/**
 * @license Angular v16.2.9
 * (c) 2010-2022 Google LLC. https://angular.io/
 * License: MIT
 */

import * as i0 from '@angular/core';
import { Injectable, inject, NgZone, InjectionToken, ɵInitialRenderPendingTasks, Inject, ɵRuntimeError, PLATFORM_ID, makeEnvironmentProviders, NgModule, TransferState, makeStateKey, ɵENABLED_SSR_FEATURES, APP_BOOTSTRAP_LISTENER, ApplicationRef } from '@angular/core';
import { of, Observable, from } from 'rxjs';
import { concatMap, filter, map, finalize, switchMap, tap, first } from 'rxjs/operators';
import * as i1 from '@angular/common';
import { DOCUMENT, ɵparseCookieValue } from '@angular/common';

/**
 * Transforms an `HttpRequest` into a stream of `HttpEvent`s, one of which will likely be a
 * `HttpResponse`.
 *
 * `HttpHandler` is injectable. When injected, the handler instance dispatches requests to the
 * first interceptor in the chain, which dispatches to the second, etc, eventually reaching the
 * `HttpBackend`.
 *
 * In an `HttpInterceptor`, the `HttpHandler` parameter is the next interceptor in the chain.
 *
 * @publicApi
 */
class HttpHandler {
}
/**
 * A final `HttpHandler` which will dispatch the request via browser HTTP APIs to a backend.
 *
 * Interceptors sit between the `HttpClient` interface and the `HttpBackend`.
 *
 * When injected, `HttpBackend` dispatches requests directly to the backend, without going
 * through the interceptor chain.
 *
 * @publicApi
 */
class HttpBackend {
}

/**
 * Represents the header configuration options for an HTTP request.
 * Instances are immutable. Modifying methods return a cloned
 * instance with the change. The original object is never changed.
 *
 * @publicApi
 */
class HttpHeaders {
    /**  Constructs a new HTTP header object with the given values.*/
    constructor(headers) {
        /**
         * Internal map of lowercased header names to the normalized
         * form of the name (the form seen first).
         */
        this.normalizedNames = new Map();
        /**
         * Queued updates to be materialized the next initialization.
         */
        this.lazyUpdate = null;
        if (!headers) {
            this.headers = new Map();
        }
        else if (typeof headers === 'string') {
            this.lazyInit = () => {
                this.headers = new Map();
                headers.split('\n').forEach(line => {
                    const index = line.indexOf(':');
                    if (index > 0) {
                        const name = line.slice(0, index);
                        const key = name.toLowerCase();
                        const value = line.slice(index + 1).trim();
                        this.maybeSetNormalizedName(name, key);
                        if (this.headers.has(key)) {
                            this.headers.get(key).push(value);
                        }
                        else {
                            this.headers.set(key, [value]);
                        }
                    }
                });
            };
        }
        else if (typeof Headers !== 'undefined' && headers instanceof Headers) {
            this.headers = new Map();
            headers.forEach((values, name) => {
                this.setHeaderEntries(name, values);
            });
        }
        else {
            this.lazyInit = () => {
                if (typeof ngDevMode === 'undefined' || ngDevMode) {
                    assertValidHeaders(headers);
                }
                this.headers = new Map();
                Object.entries(headers).forEach(([name, values]) => {
                    this.setHeaderEntries(name, values);
                });
            };
        }
    }
    /**
     * Checks for existence of a given header.
     *
     * @param name The header name to check for existence.
     *
     * @returns True if the header exists, false otherwise.
     */
    has(name) {
        this.init();
        return this.headers.has(name.toLowerCase());
    }
    /**
     * Retrieves the first value of a given header.
     *
     * @param name The header name.
     *
     * @returns The value string if the header exists, null otherwise
     */
    get(name) {
        this.init();
        const values = this.headers.get(name.toLowerCase());
        return values && values.length > 0 ? values[0] : null;
    }
    /**
     * Retrieves the names of the headers.
     *
     * @returns A list of header names.
     */
    keys() {
        this.init();
        return Array.from(this.normalizedNames.values());
    }
    /**
     * Retrieves a list of values for a given header.
     *
     * @param name The header name from which to retrieve values.
     *
     * @returns A string of values if the header exists, null otherwise.
     */
    getAll(name) {
        this.init();
        return this.headers.get(name.toLowerCase()) || null;
    }
    /**
     * Appends a new value to the existing set of values for a header
     * and returns them in a clone of the original instance.
     *
     * @param name The header name for which to append the values.
     * @param value The value to append.
     *
     * @returns A clone of the HTTP headers object with the value appended to the given header.
     */
    append(name, value) {
        return this.clone({ name, value, op: 'a' });
    }
    /**
     * Sets or modifies a value for a given header in a clone of the original instance.
     * If the header already exists, its value is replaced with the given value
     * in the returned object.
     *
     * @param name The header name.
     * @param value The value or values to set or override for the given header.
     *
     * @returns A clone of the HTTP headers object with the newly set header value.
     */
    set(name, value) {
        return this.clone({ name, value, op: 's' });
    }
    /**
     * Deletes values for a given header in a clone of the original instance.
     *
     * @param name The header name.
     * @param value The value or values to delete for the given header.
     *
     * @returns A clone of the HTTP headers object with the given value deleted.
     */
    delete(name, value) {
        return this.clone({ name, value, op: 'd' });
    }
    maybeSetNormalizedName(name, lcName) {
        if (!this.normalizedNames.has(lcName)) {
            this.normalizedNames.set(lcName, name);
        }
    }
    init() {
        if (!!this.lazyInit) {
            if (this.lazyInit instanceof HttpHeaders) {
                this.copyFrom(this.lazyInit);
            }
            else {
                this.lazyInit();
            }
            this.lazyInit = null;
            if (!!this.lazyUpdate) {
                this.lazyUpdate.forEach(update => this.applyUpdate(update));
                this.lazyUpdate = null;
            }
        }
    }
    copyFrom(other) {
        other.init();
        Array.from(other.headers.keys()).forEach(key => {
            this.headers.set(key, other.headers.get(key));
            this.normalizedNames.set(key, other.normalizedNames.get(key));
        });
    }
    clone(update) {
        const clone = new HttpHeaders();
        clone.lazyInit =
            (!!this.lazyInit && this.lazyInit instanceof HttpHeaders) ? this.lazyInit : this;
        clone.lazyUpdate = (this.lazyUpdate || []).concat([update]);
        return clone;
    }
    applyUpdate(update) {
        const key = update.name.toLowerCase();
        switch (update.op) {
            case 'a':
            case 's':
                let value = update.value;
                if (typeof value === 'string') {
                    value = [value];
                }
                if (value.length === 0) {
                    return;
                }
                this.maybeSetNormalizedName(update.name, key);
                const base = (update.op === 'a' ? this.headers.get(key) : undefined) || [];
                base.push(...value);
                this.headers.set(key, base);
                break;
            case 'd':
                const toDelete = update.value;
                if (!toDelete) {
                    this.headers.delete(key);
                    this.normalizedNames.delete(key);
                }
                else {
                    let existing = this.headers.get(key);
                    if (!existing) {
                        return;
                    }
                    existing = existing.filter(value => toDelete.indexOf(value) === -1);
                    if (existing.length === 0) {
                        this.headers.delete(key);
                        this.normalizedNames.delete(key);
                    }
                    else {
                        this.headers.set(key, existing);
                    }
                }
                break;
        }
    }
    setHeaderEntries(name, values) {
        const headerValues = (Array.isArray(values) ? values : [values]).map((value) => value.toString());
        const key = name.toLowerCase();
        this.headers.set(key, headerValues);
        this.maybeSetNormalizedName(name, key);
    }
    /**
     * @internal
     */
    forEach(fn) {
        this.init();
        Array.from(this.normalizedNames.keys())
            .forEach(key => fn(this.normalizedNames.get(key), this.headers.get(key)));
    }
}
/**
 * Verifies that the headers object has the right shape: the values
 * must be either strings, numbers or arrays. Throws an error if an invalid
 * header value is present.
 */
function assertValidHeaders(headers) {
    for (const [key, value] of Object.entries(headers)) {
        if (!(typeof value === 'string' || typeof value === 'number') && !Array.isArray(value)) {
            throw new Error(`Unexpected value of the \`${key}\` header provided. ` +
                `Expecting either a string, a number or an array, but got: \`${value}\`.`);
        }
    }
}

/**
 * Provides encoding and decoding of URL parameter and query-string values.
 *
 * Serializes and parses URL parameter keys and values to encode and decode them.
 * If you pass URL query parameters without encoding,
 * the query parameters can be misinterpreted at the receiving end.
 *
 *
 * @publicApi
 */
class HttpUrlEncodingCodec {
    /**
     * Encodes a key name for a URL parameter or query-string.
     * @param key The key name.
     * @returns The encoded key name.
     */
    encodeKey(key) {
        return standardEncoding(key);
    }
    /**
     * Encodes the value of a URL parameter or query-string.
     * @param value The value.
     * @returns The encoded value.
     */
    encodeValue(value) {
        return standardEncoding(value);
    }
    /**
     * Decodes an encoded URL parameter or query-string key.
     * @param key The encoded key name.
     * @returns The decoded key name.
     */
    decodeKey(key) {
        return decodeURIComponent(key);
    }
    /**
     * Decodes an encoded URL parameter or query-string value.
     * @param value The encoded value.
     * @returns The decoded value.
     */
    decodeValue(value) {
        return decodeURIComponent(value);
    }
}
function paramParser(rawParams, codec) {
    const map = new Map();
    if (rawParams.length > 0) {
        // The `window.location.search` can be used while creating an instance of the `HttpParams` class
        // (e.g. `new HttpParams({ fromString: window.location.search })`). The `window.location.search`
        // may start with the `?` char, so we strip it if it's present.
        const params = rawParams.replace(/^\?/, '').split('&');
        params.forEach((param) => {
            const eqIdx = param.indexOf('=');
            const [key, val] = eqIdx == -1 ?
                [codec.decodeKey(param), ''] :
                [codec.decodeKey(param.slice(0, eqIdx)), codec.decodeValue(param.slice(eqIdx + 1))];
            const list = map.get(key) || [];
            list.push(val);
            map.set(key, list);
        });
    }
    return map;
}
/**
 * Encode input string with standard encodeURIComponent and then un-encode specific characters.
 */
const STANDARD_ENCODING_REGEX = /%(\d[a-f0-9])/gi;
const STANDARD_ENCODING_REPLACEMENTS = {
    '40': '@',
    '3A': ':',
    '24': '$',
    '2C': ',',
    '3B': ';',
    '3D': '=',
    '3F': '?',
    '2F': '/',
};
function standardEncoding(v) {
    return encodeURIComponent(v).replace(STANDARD_ENCODING_REGEX, (s, t) => STANDARD_ENCODING_REPLACEMENTS[t] ?? s);
}
function valueToString(value) {
    return `${value}`;
}
/**
 * An HTTP request/response body that represents serialized parameters,
 * per the MIME type `application/x-www-form-urlencoded`.
 *
 * This class is immutable; all mutation operations return a new instance.
 *
 * @publicApi
 */
class HttpParams {
    constructor(options = {}) {
        this.updates = null;
        this.cloneFrom = null;
        this.encoder = options.encoder || new HttpUrlEncodingCodec();
        if (!!options.fromString) {
            if (!!options.fromObject) {
                throw new Error(`Cannot specify both fromString and fromObject.`);
            }
            this.map = paramParser(options.fromString, this.encoder);
        }
        else if (!!options.fromObject) {
            this.map = new Map();
            Object.keys(options.fromObject).forEach(key => {
                const value = options.fromObject[key];
                // convert the values to strings
                const values = Array.isArray(value) ? value.map(valueToString) : [valueToString(value)];
                this.map.set(key, values);
            });
        }
        else {
            this.map = null;
        }
    }
    /**
     * Reports whether the body includes one or more values for a given parameter.
     * @param param The parameter name.
     * @returns True if the parameter has one or more values,
     * false if it has no value or is not present.
     */
    has(param) {
        this.init();
        return this.map.has(param);
    }
    /**
     * Retrieves the first value for a parameter.
     * @param param The parameter name.
     * @returns The first value of the given parameter,
     * or `null` if the parameter is not present.
     */
    get(param) {
        this.init();
        const res = this.map.get(param);
        return !!res ? res[0] : null;
    }
    /**
     * Retrieves all values for a  parameter.
     * @param param The parameter name.
     * @returns All values in a string array,
     * or `null` if the parameter not present.
     */
    getAll(param) {
        this.init();
        return this.map.get(param) || null;
    }
    /**
     * Retrieves all the parameters for this body.
     * @returns The parameter names in a string array.
     */
    keys() {
        this.init();
        return Array.from(this.map.keys());
    }
    /**
     * Appends a new value to existing values for a parameter.
     * @param param The parameter name.
     * @param value The new value to add.
     * @return A new body with the appended value.
     */
    append(param, value) {
        return this.clone({ param, value, op: 'a' });
    }
    /**
     * Constructs a new body with appended values for the given parameter name.
     * @param params parameters and values
     * @return A new body with the new value.
     */
    appendAll(params) {
        const updates = [];
        Object.keys(params).forEach(param => {
            const value = params[param];
            if (Array.isArray(value)) {
                value.forEach(_value => {
                    updates.push({ param, value: _value, op: 'a' });
                });
            }
            else {
                updates.push({ param, value: value, op: 'a' });
            }
        });
        return this.clone(updates);
    }
    /**
     * Replaces the value for a parameter.
     * @param param The parameter name.
     * @param value The new value.
     * @return A new body with the new value.
     */
    set(param, value) {
        return this.clone({ param, value, op: 's' });
    }
    /**
     * Removes a given value or all values from a parameter.
     * @param param The parameter name.
     * @param value The value to remove, if provided.
     * @return A new body with the given value removed, or with all values
     * removed if no value is specified.
     */
    delete(param, value) {
        return this.clone({ param, value, op: 'd' });
    }
    /**
     * Serializes the body to an encoded string, where key-value pairs (separated by `=`) are
     * separated by `&`s.
     */
    toString() {
        this.init();
        return this.keys()
            .map(key => {
            const eKey = this.encoder.encodeKey(key);
            // `a: ['1']` produces `'a=1'`
            // `b: []` produces `''`
            // `c: ['1', '2']` produces `'c=1&c=2'`
            return this.map.get(key).map(value => eKey + '=' + this.encoder.encodeValue(value))
                .join('&');
        })
            // filter out empty values because `b: []` produces `''`
            // which results in `a=1&&c=1&c=2` instead of `a=1&c=1&c=2` if we don't
            .filter(param => param !== '')
            .join('&');
    }
    clone(update) {
        const clone = new HttpParams({ encoder: this.encoder });
        clone.cloneFrom = this.cloneFrom || this;
        clone.updates = (this.updates || []).concat(update);
        return clone;
    }
    init() {
        if (this.map === null) {
            this.map = new Map();
        }
        if (this.cloneFrom !== null) {
            this.cloneFrom.init();
            this.cloneFrom.keys().forEach(key => this.map.set(key, this.cloneFrom.map.get(key)));
            this.updates.forEach(update => {
                switch (update.op) {
                    case 'a':
                    case 's':
                        const base = (update.op === 'a' ? this.map.get(update.param) : undefined) || [];
                        base.push(valueToString(update.value));
                        this.map.set(update.param, base);
                        break;
                    case 'd':
                        if (update.value !== undefined) {
                            let base = this.map.get(update.param) || [];
                            const idx = base.indexOf(valueToString(update.value));
                            if (idx !== -1) {
                                base.splice(idx, 1);
                            }
                            if (base.length > 0) {
                                this.map.set(update.param, base);
                            }
                            else {
                                this.map.delete(update.param);
                            }
                        }
                        else {
                            this.map.delete(update.param);
                            break;
                        }
                }
            });
            this.cloneFrom = this.updates = null;
        }
    }
}

/**
 * A token used to manipulate and access values stored in `HttpContext`.
 *
 * @publicApi
 */
class HttpContextToken {
    constructor(defaultValue) {
        this.defaultValue = defaultValue;
    }
}
/**
 * Http context stores arbitrary user defined values and ensures type safety without
 * actually knowing the types. It is backed by a `Map` and guarantees that keys do not clash.
 *
 * This context is mutable and is shared between cloned requests unless explicitly specified.
 *
 * @usageNotes
 *
 * ### Usage Example
 *
 * ```typescript
 * // inside cache.interceptors.ts
 * export const IS_CACHE_ENABLED = new HttpContextToken<boolean>(() => false);
 *
 * export class CacheInterceptor implements HttpInterceptor {
 *
 *   intercept(req: HttpRequest<any>, delegate: HttpHandler): Observable<HttpEvent<any>> {
 *     if (req.context.get(IS_CACHE_ENABLED) === true) {
 *       return ...;
 *     }
 *     return delegate.handle(req);
 *   }
 * }
 *
 * // inside a service
 *
 * this.httpClient.get('/api/weather', {
 *   context: new HttpContext().set(IS_CACHE_ENABLED, true)
 * }).subscribe(...);
 * ```
 *
 * @publicApi
 */
class HttpContext {
    constructor() {
        this.map = new Map();
    }
    /**
     * Store a value in the context. If a value is already present it will be overwritten.
     *
     * @param token The reference to an instance of `HttpContextToken`.
     * @param value The value to store.
     *
     * @returns A reference to itself for easy chaining.
     */
    set(token, value) {
        this.map.set(token, value);
        return this;
    }
    /**
     * Retrieve the value associated with the given token.
     *
     * @param token The reference to an instance of `HttpContextToken`.
     *
     * @returns The stored value or default if one is defined.
     */
    get(token) {
        if (!this.map.has(token)) {
            this.map.set(token, token.defaultValue());
        }
        return this.map.get(token);
    }
    /**
     * Delete the value associated with the given token.
     *
     * @param token The reference to an instance of `HttpContextToken`.
     *
     * @returns A reference to itself for easy chaining.
     */
    delete(token) {
        this.map.delete(token);
        return this;
    }
    /**
     * Checks for existence of a given token.
     *
     * @param token The reference to an instance of `HttpContextToken`.
     *
     * @returns True if the token exists, false otherwise.
     */
    has(token) {
        return this.map.has(token);
    }
    /**
     * @returns a list of tokens currently stored in the context.
     */
    keys() {
        return this.map.keys();
    }
}

/**
 * Determine whether the given HTTP method may include a body.
 */
function mightHaveBody(method) {
    switch (method) {
        case 'DELETE':
        case 'GET':
        case 'HEAD':
        case 'OPTIONS':
        case 'JSONP':
            return false;
        default:
            return true;
    }
}
/**
 * Safely assert whether the given value is an ArrayBuffer.
 *
 * In some execution environments ArrayBuffer is not defined.
 */
function isArrayBuffer(value) {
    return typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer;
}
/**
 * Safely assert whether the given value is a Blob.
 *
 * In some execution environments Blob is not defined.
 */
function isBlob(value) {
    return typeof Blob !== 'undefined' && value instanceof Blob;
}
/**
 * Safely assert whether the given value is a FormData instance.
 *
 * In some execution environments FormData is not defined.
 */
function isFormData(value) {
    return typeof FormData !== 'undefined' && value instanceof FormData;
}
/**
 * Safely assert whether the given value is a URLSearchParams instance.
 *
 * In some execution environments URLSearchParams is not defined.
 */
function isUrlSearchParams(value) {
    return typeof URLSearchParams !== 'undefined' && value instanceof URLSearchParams;
}
/**
 * An outgoing HTTP request with an optional typed body.
 *
 * `HttpRequest` represents an outgoing request, including URL, method,
 * headers, body, and other request configuration options. Instances should be
 * assumed to be immutable. To modify a `HttpRequest`, the `clone`
 * method should be used.
 *
 * @publicApi
 */
class HttpRequest {
    constructor(method, url, third, fourth) {
        this.url = url;
        /**
         * The request body, or `null` if one isn't set.
         *
         * Bodies are not enforced to be immutable, as they can include a reference to any
         * user-defined data type. However, interceptors should take care to preserve
         * idempotence by treating them as such.
         */
        this.body = null;
        /**
         * Whether this request should be made in a way that exposes progress events.
         *
         * Progress events are expensive (change detection runs on each event) and so
         * they should only be requested if the consumer intends to monitor them.
         *
         * Note: The `FetchBackend` doesn't support progress report on uploads.
         */
        this.reportProgress = false;
        /**
         * Whether this request should be sent with outgoing credentials (cookies).
         */
        this.withCredentials = false;
        /**
         * The expected response type of the server.
         *
         * This is used to parse the response appropriately before returning it to
         * the requestee.
         */
        this.responseType = 'json';
        this.method = method.toUpperCase();
        // Next, need to figure out which argument holds the HttpRequestInit
        // options, if any.
        let options;
        // Check whether a body argument is expected. The only valid way to omit
        // the body argument is to use a known no-body method like GET.
        if (mightHaveBody(this.method) || !!fourth) {
            // Body is the third argument, options are the fourth.
            this.body = (third !== undefined) ? third : null;
            options = fourth;
        }
        else {
            // No body required, options are the third argument. The body stays null.
            options = third;
        }
        // If options have been passed, interpret them.
        if (options) {
            // Normalize reportProgress and withCredentials.
            this.reportProgress = !!options.reportProgress;
            this.withCredentials = !!options.withCredentials;
            // Override default response type of 'json' if one is provided.
            if (!!options.responseType) {
                this.responseType = options.responseType;
            }
            // Override headers if they're provided.
            if (!!options.headers) {
                this.headers = options.headers;
            }
            if (!!options.context) {
                this.context = options.context;
            }
            if (!!options.params) {
                this.params = options.params;
            }
        }
        // If no headers have been passed in, construct a new HttpHeaders instance.
        if (!this.headers) {
            this.headers = new HttpHeaders();
        }
        // If no context have been passed in, construct a new HttpContext instance.
        if (!this.context) {
            this.context = new HttpContext();
        }
        // If no parameters have been passed in, construct a new HttpUrlEncodedParams instance.
        if (!this.params) {
            this.params = new HttpParams();
            this.urlWithParams = url;
        }
        else {
            // Encode the parameters to a string in preparation for inclusion in the URL.
            const params = this.params.toString();
            if (params.length === 0) {
                // No parameters, the visible URL is just the URL given at creation time.
                this.urlWithParams = url;
            }
            else {
                // Does the URL already have query parameters? Look for '?'.
                const qIdx = url.indexOf('?');
                // There are 3 cases to handle:
                // 1) No existing parameters -> append '?' followed by params.
                // 2) '?' exists and is followed by existing query string ->
                //    append '&' followed by params.
                // 3) '?' exists at the end of the url -> append params directly.
                // This basically amounts to determining the character, if any, with
                // which to join the URL and parameters.
                const sep = qIdx === -1 ? '?' : (qIdx < url.length - 1 ? '&' : '');
                this.urlWithParams = url + sep + params;
            }
        }
    }
    /**
     * Transform the free-form body into a serialized format suitable for
     * transmission to the server.
     */
    serializeBody() {
        // If no body is present, no need to serialize it.
        if (this.body === null) {
            return null;
        }
        // Check whether the body is already in a serialized form. If so,
        // it can just be returned directly.
        if (isArrayBuffer(this.body) || isBlob(this.body) || isFormData(this.body) ||
            isUrlSearchParams(this.body) || typeof this.body === 'string') {
            return this.body;
        }
        // Check whether the body is an instance of HttpUrlEncodedParams.
        if (this.body instanceof HttpParams) {
            return this.body.toString();
        }
        // Check whether the body is an object or array, and serialize with JSON if so.
        if (typeof this.body === 'object' || typeof this.body === 'boolean' ||
            Array.isArray(this.body)) {
            return JSON.stringify(this.body);
        }
        // Fall back on toString() for everything else.
        return this.body.toString();
    }
    /**
     * Examine the body and attempt to infer an appropriate MIME type
     * for it.
     *
     * If no such type can be inferred, this method will return `null`.
     */
    detectContentTypeHeader() {
        // An empty body has no content type.
        if (this.body === null) {
            return null;
        }
        // FormData bodies rely on the browser's content type assignment.
        if (isFormData(this.body)) {
            return null;
        }
        // Blobs usually have their own content type. If it doesn't, then
        // no type can be inferred.
        if (isBlob(this.body)) {
            return this.body.type || null;
        }
        // Array buffers have unknown contents and thus no type can be inferred.
        if (isArrayBuffer(this.body)) {
            return null;
        }
        // Technically, strings could be a form of JSON data, but it's safe enough
        // to assume they're plain strings.
        if (typeof this.body === 'string') {
            return 'text/plain';
        }
        // `HttpUrlEncodedParams` has its own content-type.
        if (this.body instanceof HttpParams) {
            return 'application/x-www-form-urlencoded;charset=UTF-8';
        }
        // Arrays, objects, boolean and numbers will be encoded as JSON.
        if (typeof this.body === 'object' || typeof this.body === 'number' ||
            typeof this.body === 'boolean') {
            return 'application/json';
        }
        // No type could be inferred.
        return null;
    }
    clone(update = {}) {
        // For method, url, and responseType, take the current value unless
        // it is overridden in the update hash.
        const method = update.method || this.method;
        const url = update.url || this.url;
        const responseType = update.responseType || this.responseType;
        // The body is somewhat special - a `null` value in update.body means
        // whatever current body is present is being overridden with an empty
        // body, whereas an `undefined` value in update.body implies no
        // override.
        const body = (update.body !== undefined) ? update.body : this.body;
        // Carefully handle the boolean options to differentiate between
        // `false` and `undefined` in the update args.
        const withCredentials = (update.withCredentials !== undefined) ? update.withCredentials : this.withCredentials;
        const reportProgress = (update.reportProgress !== undefined) ? update.reportProgress : this.reportProgress;
        // Headers and params may be appended to if `setHeaders` or
        // `setParams` are used.
        let headers = update.headers || this.headers;
        let params = update.params || this.params;
        // Pass on context if needed
        const context = update.context ?? this.context;
        // Check whether the caller has asked to add headers.
        if (update.setHeaders !== undefined) {
            // Set every requested header.
            headers =
                Object.keys(update.setHeaders)
                    .reduce((headers, name) => headers.set(name, update.setHeaders[name]), headers);
        }
        // Check whether the caller has asked to set params.
        if (update.setParams) {
            // Set every requested param.
            params = Object.keys(update.setParams)
                .reduce((params, param) => params.set(param, update.setParams[param]), params);
        }
        // Finally, construct the new HttpRequest using the pieces from above.
        return new HttpRequest(method, url, body, {
            params,
            headers,
            context,
            reportProgress,
            responseType,
            withCredentials,
        });
    }
}

/**
 * Type enumeration for the different kinds of `HttpEvent`.
 *
 * @publicApi
 */
var HttpEventType;
(function (HttpEventType) {
    /**
     * The request was sent out over the wire.
     */
    HttpEventType[HttpEventType["Sent"] = 0] = "Sent";
    /**
     * An upload progress event was received.
     *
     * Note: The `FetchBackend` doesn't support progress report on uploads.
     */
    HttpEventType[HttpEventType["UploadProgress"] = 1] = "UploadProgress";
    /**
     * The response status code and headers were received.
     */
    HttpEventType[HttpEventType["ResponseHeader"] = 2] = "ResponseHeader";
    /**
     * A download progress event was received.
     */
    HttpEventType[HttpEventType["DownloadProgress"] = 3] = "DownloadProgress";
    /**
     * The full response including the body was received.
     */
    HttpEventType[HttpEventType["Response"] = 4] = "Response";
    /**
     * A custom event from an interceptor or a backend.
     */
    HttpEventType[HttpEventType["User"] = 5] = "User";
})(HttpEventType || (HttpEventType = {}));
/**
 * Base class for both `HttpResponse` and `HttpHeaderResponse`.
 *
 * @publicApi
 */
class HttpResponseBase {
    /**
     * Super-constructor for all responses.
     *
     * The single parameter accepted is an initialization hash. Any properties
     * of the response passed there will override the default values.
     */
    constructor(init, defaultStatus = 200 /* HttpStatusCode.Ok */, defaultStatusText = 'OK') {
        // If the hash has values passed, use them to initialize the response.
        // Otherwise use the default values.
        this.headers = init.headers || new HttpHeaders();
        this.status = init.status !== undefined ? init.status : defaultStatus;
        this.statusText = init.statusText || defaultStatusText;
        this.url = init.url || null;
        // Cache the ok value to avoid defining a getter.
        this.ok = this.status >= 200 && this.status < 300;
    }
}
/**
 * A partial HTTP response which only includes the status and header data,
 * but no response body.
 *
 * `HttpHeaderResponse` is a `HttpEvent` available on the response
 * event stream, only when progress events are requested.
 *
 * @publicApi
 */
class HttpHeaderResponse extends HttpResponseBase {
    /**
     * Create a new `HttpHeaderResponse` with the given parameters.
     */
    constructor(init = {}) {
        super(init);
        this.type = HttpEventType.ResponseHeader;
    }
    /**
     * Copy this `HttpHeaderResponse`, overriding its contents with the
     * given parameter hash.
     */
    clone(update = {}) {
        // Perform a straightforward initialization of the new HttpHeaderResponse,
        // overriding the current parameters with new ones if given.
        return new HttpHeaderResponse({
            headers: update.headers || this.headers,
            status: update.status !== undefined ? update.status : this.status,
            statusText: update.statusText || this.statusText,
            url: update.url || this.url || undefined,
        });
    }
}
/**
 * A full HTTP response, including a typed response body (which may be `null`
 * if one was not returned).
 *
 * `HttpResponse` is a `HttpEvent` available on the response event
 * stream.
 *
 * @publicApi
 */
class HttpResponse extends HttpResponseBase {
    /**
     * Construct a new `HttpResponse`.
     */
    constructor(init = {}) {
        super(init);
        this.type = HttpEventType.Response;
        this.body = init.body !== undefined ? init.body : null;
    }
    clone(update = {}) {
        return new HttpResponse({
            body: (update.body !== undefined) ? update.body : this.body,
            headers: update.headers || this.headers,
            status: (update.status !== undefined) ? update.status : this.status,
            statusText: update.statusText || this.statusText,
            url: update.url || this.url || undefined,
        });
    }
}
/**
 * A response that represents an error or failure, either from a
 * non-successful HTTP status, an error while executing the request,
 * or some other failure which occurred during the parsing of the response.
 *
 * Any error returned on the `Observable` response stream will be
 * wrapped in an `HttpErrorResponse` to provide additional context about
 * the state of the HTTP layer when the error occurred. The error property
 * will contain either a wrapped Error object or the error response returned
 * from the server.
 *
 * @publicApi
 */
class HttpErrorResponse extends HttpResponseBase {
    constructor(init) {
        // Initialize with a default status of 0 / Unknown Error.
        super(init, 0, 'Unknown Error');
        this.name = 'HttpErrorResponse';
        /**
         * Errors are never okay, even when the status code is in the 2xx success range.
         */
        this.ok = false;
        // If the response was successful, then this was a parse error. Otherwise, it was
        // a protocol-level failure of some sort. Either the request failed in transit
        // or the server returned an unsuccessful status code.
        if (this.status >= 200 && this.status < 300) {
            this.message = `Http failure during parsing for ${init.url || '(unknown url)'}`;
        }
        else {
            this.message = `Http failure response for ${init.url || '(unknown url)'}: ${init.status} ${init.statusText}`;
        }
        this.error = init.error || null;
    }
}

/**
 * Constructs an instance of `HttpRequestOptions<T>` from a source `HttpMethodOptions` and
 * the given `body`. This function clones the object and adds the body.
 *
 * Note that the `responseType` *options* value is a String that identifies the
 * single data type of the response.
 * A single overload version of the method handles each response type.
 * The value of `responseType` cannot be a union, as the combined signature could imply.
 *
 */
function addBody(options, body) {
    return {
        body,
        headers: options.headers,
        context: options.context,
        observe: options.observe,
        params: options.params,
        reportProgress: options.reportProgress,
        responseType: options.responseType,
        withCredentials: options.withCredentials,
    };
}
/**
 * Performs HTTP requests.
 * This service is available as an injectable class, with methods to perform HTTP requests.
 * Each request method has multiple signatures, and the return type varies based on
 * the signature that is called (mainly the values of `observe` and `responseType`).
 *
 * Note that the `responseType` *options* value is a String that identifies the
 * single data type of the response.
 * A single overload version of the method handles each response type.
 * The value of `responseType` cannot be a union, as the combined signature could imply.

 *
 * @usageNotes
 * Sample HTTP requests for the [Tour of Heroes](/tutorial/tour-of-heroes/toh-pt0) application.
 *
 * ### HTTP Request Example
 *
 * ```
 *  // GET heroes whose name contains search term
 * searchHeroes(term: string): observable<Hero[]>{
 *
 *  const params = new HttpParams({fromString: 'name=term'});
 *    return this.httpClient.request('GET', this.heroesUrl, {responseType:'json', params});
 * }
 * ```
 *
 * Alternatively, the parameter string can be used without invoking HttpParams
 * by directly joining to the URL.
 * ```
 * this.httpClient.request('GET', this.heroesUrl + '?' + 'name=term', {responseType:'json'});
 * ```
 *
 *
 * ### JSONP Example
 * ```
 * requestJsonp(url, callback = 'callback') {
 *  return this.httpClient.jsonp(this.heroesURL, callback);
 * }
 * ```
 *
 * ### PATCH Example
 * ```
 * // PATCH one of the heroes' name
 * patchHero (id: number, heroName: string): Observable<{}> {
 * const url = `${this.heroesUrl}/${id}`;   // PATCH api/heroes/42
 *  return this.httpClient.patch(url, {name: heroName}, httpOptions)
 *    .pipe(catchError(this.handleError('patchHero')));
 * }
 * ```
 *
 * @see [HTTP Guide](guide/understanding-communicating-with-http)
 * @see [HTTP Request](api/common/http/HttpRequest)
 *
 * @publicApi
 */
class HttpClient {
    constructor(handler) {
        this.handler = handler;
    }
    /**
     * Constructs an observable for a generic HTTP request that, when subscribed,
     * fires the request through the chain of registered interceptors and on to the
     * server.
     *
     * You can pass an `HttpRequest` directly as the only parameter. In this case,
     * the call returns an observable of the raw `HttpEvent` stream.
     *
     * Alternatively you can pass an HTTP method as the first parameter,
     * a URL string as the second, and an options hash containing the request body as the third.
     * See `addBody()`. In this case, the specified `responseType` and `observe` options determine the
     * type of returned observable.
     *   * The `responseType` value determines how a successful response body is parsed.
     *   * If `responseType` is the default `json`, you can pass a type interface for the resulting
     * object as a type parameter to the call.
     *
     * The `observe` value determines the return type, according to what you are interested in
     * observing.
     *   * An `observe` value of events returns an observable of the raw `HttpEvent` stream, including
     * progress events by default.
     *   * An `observe` value of response returns an observable of `HttpResponse<T>`,
     * where the `T` parameter depends on the `responseType` and any optionally provided type
     * parameter.
     *   * An `observe` value of body returns an observable of `<T>` with the same `T` body type.
     *
     */
    request(first, url, options = {}) {
        let req;
        // First, check whether the primary argument is an instance of `HttpRequest`.
        if (first instanceof HttpRequest) {
            // It is. The other arguments must be undefined (per the signatures) and can be
            // ignored.
            req = first;
        }
        else {
            // It's a string, so it represents a URL. Construct a request based on it,
            // and incorporate the remaining arguments (assuming `GET` unless a method is
            // provided.
            // Figure out the headers.
            let headers = undefined;
            if (options.headers instanceof HttpHeaders) {
                headers = options.headers;
            }
            else {
                headers = new HttpHeaders(options.headers);
            }
            // Sort out parameters.
            let params = undefined;
            if (!!options.params) {
                if (options.params instanceof HttpParams) {
                    params = options.params;
                }
                else {
                    params = new HttpParams({ fromObject: options.params });
                }
            }
            // Construct the request.
            req = new HttpRequest(first, url, (options.body !== undefined ? options.body : null), {
                headers,
                context: options.context,
                params,
                reportProgress: options.reportProgress,
                // By default, JSON is assumed to be returned for all calls.
                responseType: options.responseType || 'json',
                withCredentials: options.withCredentials,
            });
        }
        // Start with an Observable.of() the initial request, and run the handler (which
        // includes all interceptors) inside a concatMap(). This way, the handler runs
        // inside an Observable chain, which causes interceptors to be re-run on every
        // subscription (this also makes retries re-run the handler, including interceptors).
        const events$ = of(req).pipe(concatMap((req) => this.handler.handle(req)));
        // If coming via the API signature which accepts a previously constructed HttpRequest,
        // the only option is to get the event stream. Otherwise, return the event stream if
        // that is what was requested.
        if (first instanceof HttpRequest || options.observe === 'events') {
            return events$;
        }
        // The requested stream contains either the full response or the body. In either
        // case, the first step is to filter the event stream to extract a stream of
        // responses(s).
        const res$ = events$.pipe(filter((event) => event instanceof HttpResponse));
        // Decide which stream to return.
        switch (options.observe || 'body') {
            case 'body':
                // The requested stream is the body. Map the response stream to the response
                // body. This could be done more simply, but a misbehaving interceptor might
                // transform the response body into a different format and ignore the requested
                // responseType. Guard against this by validating that the response is of the
                // requested type.
                switch (req.responseType) {
                    case 'arraybuffer':
                        return res$.pipe(map((res) => {
                            // Validate that the body is an ArrayBuffer.
                            if (res.body !== null && !(res.body instanceof ArrayBuffer)) {
                                throw new Error('Response is not an ArrayBuffer.');
                            }
                            return res.body;
                        }));
                    case 'blob':
                        return res$.pipe(map((res) => {
                            // Validate that the body is a Blob.
                            if (res.body !== null && !(res.body instanceof Blob)) {
                                throw new Error('Response is not a Blob.');
                            }
                            return res.body;
                        }));
                    case 'text':
                        return res$.pipe(map((res) => {
                            // Validate that the body is a string.
                            if (res.body !== null && typeof res.body !== 'string') {
                                throw new Error('Response is not a string.');
                            }
                            return res.body;
                        }));
                    case 'json':
                    default:
                        // No validation needed for JSON responses, as they can be of any type.
                        return res$.pipe(map((res) => res.body));
                }
            case 'response':
                // The response stream was requested directly, so return it.
                return res$;
            default:
                // Guard against new future observe types being added.
                throw new Error(`Unreachable: unhandled observe type ${options.observe}}`);
        }
    }
    /**
     * Constructs an observable that, when subscribed, causes the configured
     * `DELETE` request to execute on the server. See the individual overloads for
     * details on the return type.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     */
    delete(url, options = {}) {
        return this.request('DELETE', url, options);
    }
    /**
     * Constructs an observable that, when subscribed, causes the configured
     * `GET` request to execute on the server. See the individual overloads for
     * details on the return type.
     */
    get(url, options = {}) {
        return this.request('GET', url, options);
    }
    /**
     * Constructs an observable that, when subscribed, causes the configured
     * `HEAD` request to execute on the server. The `HEAD` method returns
     * meta information about the resource without transferring the
     * resource itself. See the individual overloads for
     * details on the return type.
     */
    head(url, options = {}) {
        return this.request('HEAD', url, options);
    }
    /**
     * Constructs an `Observable` that, when subscribed, causes a request with the special method
     * `JSONP` to be dispatched via the interceptor pipeline.
     * The [JSONP pattern](https://en.wikipedia.org/wiki/JSONP) works around limitations of certain
     * API endpoints that don't support newer,
     * and preferable [CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) protocol.
     * JSONP treats the endpoint API as a JavaScript file and tricks the browser to process the
     * requests even if the API endpoint is not located on the same domain (origin) as the client-side
     * application making the request.
     * The endpoint API must support JSONP callback for JSONP requests to work.
     * The resource API returns the JSON response wrapped in a callback function.
     * You can pass the callback function name as one of the query parameters.
     * Note that JSONP requests can only be used with `GET` requests.
     *
     * @param url The resource URL.
     * @param callbackParam The callback function name.
     *
     */
    jsonp(url, callbackParam) {
        return this.request('JSONP', url, {
            params: new HttpParams().append(callbackParam, 'JSONP_CALLBACK'),
            observe: 'body',
            responseType: 'json',
        });
    }
    /**
     * Constructs an `Observable` that, when subscribed, causes the configured
     * `OPTIONS` request to execute on the server. This method allows the client
     * to determine the supported HTTP methods and other capabilities of an endpoint,
     * without implying a resource action. See the individual overloads for
     * details on the return type.
     */
    options(url, options = {}) {
        return this.request('OPTIONS', url, options);
    }
    /**
     * Constructs an observable that, when subscribed, causes the configured
     * `PATCH` request to execute on the server. See the individual overloads for
     * details on the return type.
     */
    patch(url, body, options = {}) {
        return this.request('PATCH', url, addBody(options, body));
    }
    /**
     * Constructs an observable that, when subscribed, causes the configured
     * `POST` request to execute on the server. The server responds with the location of
     * the replaced resource. See the individual overloads for
     * details on the return type.
     */
    post(url, body, options = {}) {
        return this.request('POST', url, addBody(options, body));
    }
    /**
     * Constructs an observable that, when subscribed, causes the configured
     * `PUT` request to execute on the server. The `PUT` method replaces an existing resource
     * with a new set of values.
     * See the individual overloads for details on the return type.
     */
    put(url, body, options = {}) {
        return this.request('PUT', url, addBody(options, body));
    }
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpClient, deps: [{ token: HttpHandler }], target: i0.ɵɵFactoryTarget.Injectable }); }
    static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpClient }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpClient, decorators: [{
            type: Injectable
        }], ctorParameters: function () { return [{ type: HttpHandler }]; } });

const XSSI_PREFIX$1 = /^\)\]\}',?\n/;
const REQUEST_URL_HEADER = `X-Request-URL`;
/**
 * Determine an appropriate URL for the response, by checking either
 * response url or the X-Request-URL header.
 */
function getResponseUrl$1(response) {
    if (response.url) {
        return response.url;
    }
    // stored as lowercase in the map
    const xRequestUrl = REQUEST_URL_HEADER.toLocaleLowerCase();
    return response.headers.get(xRequestUrl);
}
/**
 * Uses `fetch` to send requests to a backend server.
 *
 * This `FetchBackend` requires the support of the
 * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) which is available on all
 * supported browsers and on Node.js v18 or later.
 *
 * @see {@link HttpHandler}
 *
 * @publicApi
 * @developerPreview
 */
class FetchBackend {
    constructor() {
        // We need to bind the native fetch to its context or it will throw an "illegal invocation"
        this.fetchImpl = inject(FetchFactory, { optional: true })?.fetch ?? fetch.bind(globalThis);
        this.ngZone = inject(NgZone);
    }
    handle(request) {
        return new Observable(observer => {
            const aborter = new AbortController();
            this.doRequest(request, aborter.signal, observer)
                .then(noop, error => observer.error(new HttpErrorResponse({ error })));
            return () => aborter.abort();
        });
    }
    async doRequest(request, signal, observer) {
        const init = this.createRequestInit(request);
        let response;
        try {
            const fetchPromise = this.fetchImpl(request.urlWithParams, { signal, ...init });
            // Make sure Zone.js doesn't trigger false-positive unhandled promise
            // error in case the Promise is rejected synchronously. See function
            // description for additional information.
            silenceSuperfluousUnhandledPromiseRejection(fetchPromise);
            // Send the `Sent` event before awaiting the response.
            observer.next({ type: HttpEventType.Sent });
            response = await fetchPromise;
        }
        catch (error) {
            observer.error(new HttpErrorResponse({
                error,
                status: error.status ?? 0,
                statusText: error.statusText,
                url: request.urlWithParams,
                headers: error.headers,
            }));
            return;
        }
        const headers = new HttpHeaders(response.headers);
        const statusText = response.statusText;
        const url = getResponseUrl$1(response) ?? request.urlWithParams;
        let status = response.status;
        let body = null;
        if (request.reportProgress) {
            observer.next(new HttpHeaderResponse({ headers, status, statusText, url }));
        }
        if (response.body) {
            // Read Progress
            const contentLength = response.headers.get('content-length');
            const chunks = [];
            const reader = response.body.getReader();
            let receivedLength = 0;
            let decoder;
            let partialText;
            // We have to check whether the Zone is defined in the global scope because this may be called
            // when the zone is nooped.
            const reqZone = typeof Zone !== 'undefined' && Zone.current;
            // Perform response processing outside of Angular zone to
            // ensure no excessive change detection runs are executed
            // Here calling the async ReadableStreamDefaultReader.read() is responsible for triggering CD
            await this.ngZone.runOutsideAngular(async () => {
                while (true) {
                    const { done, value } = await reader.read();
                    if (done) {
                        break;
                    }
                    chunks.push(value);
                    receivedLength += value.length;
                    if (request.reportProgress) {
                        partialText = request.responseType === 'text' ?
                            (partialText ?? '') + (decoder ??= new TextDecoder).decode(value, { stream: true }) :
                            undefined;
                        const reportProgress = () => observer.next({
                            type: HttpEventType.DownloadProgress,
                            total: contentLength ? +contentLength : undefined,
                            loaded: receivedLength,
                            partialText,
                        });
                        reqZone ? reqZone.run(reportProgress) : reportProgress();
                    }
                }
            });
            // Combine all chunks.
            const chunksAll = this.concatChunks(chunks, receivedLength);
            try {
                body = this.parseBody(request, chunksAll);
            }
            catch (error) {
                // Body loading or parsing failed
                observer.error(new HttpErrorResponse({
                    error,
                    headers: new HttpHeaders(response.headers),
                    status: response.status,
                    statusText: response.statusText,
                    url: getResponseUrl$1(response) ?? request.urlWithParams,
                }));
                return;
            }
        }
        // Same behavior as the XhrBackend
        if (status === 0) {
            status = body ? 200 /* HttpStatusCode.Ok */ : 0;
        }
        // ok determines whether the response will be transmitted on the event or
        // error channel. Unsuccessful status codes (not 2xx) will always be errors,
        // but a successful status code can still result in an error if the user
        // asked for JSON data and the body cannot be parsed as such.
        const ok = status >= 200 && status < 300;
        if (ok) {
            observer.next(new HttpResponse({
                body,
                headers,
                status,
                statusText,
                url,
            }));
            // The full body has been received and delivered, no further events
            // are possible. This request is complete.
            observer.complete();
        }
        else {
            observer.error(new HttpErrorResponse({
                error: body,
                headers,
                status,
                statusText,
                url,
            }));
        }
    }
    parseBody(request, binContent) {
        switch (request.responseType) {
            case 'json':
                // stripping the XSSI when present
                const text = new TextDecoder().decode(binContent).replace(XSSI_PREFIX$1, '');
                return text === '' ? null : JSON.parse(text);
            case 'text':
                return new TextDecoder().decode(binContent);
            case 'blob':
                return new Blob([binContent]);
            case 'arraybuffer':
                return binContent.buffer;
        }
    }
    createRequestInit(req) {
        // We could share some of this logic with the XhrBackend
        const headers = {};
        const credentials = req.withCredentials ? 'include' : undefined;
        // Setting all the requested headers.
        req.headers.forEach((name, values) => (headers[name] = values.join(',')));
        // Add an Accept header if one isn't present already.
        headers['Accept'] ??= 'application/json, text/plain, */*';
        // Auto-detect the Content-Type header if one isn't present already.
        if (!headers['Content-Type']) {
            const detectedType = req.detectContentTypeHeader();
            // Sometimes Content-Type detection fails.
            if (detectedType !== null) {
                headers['Content-Type'] = detectedType;
            }
        }
        return {
            body: req.serializeBody(),
            method: req.method,
            headers,
            credentials,
        };
    }
    concatChunks(chunks, totalLength) {
        const chunksAll = new Uint8Array(totalLength);
        let position = 0;
        for (const chunk of chunks) {
            chunksAll.set(chunk, position);
            position += chunk.length;
        }
        return chunksAll;
    }
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: FetchBackend, deps: [], target: i0.ɵɵFactoryTarget.Injectable }); }
    static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: FetchBackend }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: FetchBackend, decorators: [{
            type: Injectable
        }] });
/**
 * Abstract class to provide a mocked implementation of `fetch()`
 */
class FetchFactory {
}
function noop() { }
/**
 * Zone.js treats a rejected promise that has not yet been awaited
 * as an unhandled error. This function adds a noop `.then` to make
 * sure that Zone.js doesn't throw an error if the Promise is rejected
 * synchronously.
 */
function silenceSuperfluousUnhandledPromiseRejection(promise) {
    promise.then(noop, noop);
}

function interceptorChainEndFn(req, finalHandlerFn) {
    return finalHandlerFn(req);
}
/**
 * Constructs a `ChainedInterceptorFn` which adapts a legacy `HttpInterceptor` to the
 * `ChainedInterceptorFn` interface.
 */
function adaptLegacyInterceptorToChain(chainTailFn, interceptor) {
    return (initialRequest, finalHandlerFn) => interceptor.intercept(initialRequest, {
        handle: (downstreamRequest) => chainTailFn(downstreamRequest, finalHandlerFn),
    });
}
/**
 * Constructs a `ChainedInterceptorFn` which wraps and invokes a functional interceptor in the given
 * injector.
 */
function chainedInterceptorFn(chainTailFn, interceptorFn, injector) {
    // clang-format off
    return (initialRequest, finalHandlerFn) => injector.runInContext(() => interceptorFn(initialRequest, downstreamRequest => chainTailFn(downstreamRequest, finalHandlerFn)));
    // clang-format on
}
/**
 * A multi-provider token that represents the array of registered
 * `HttpInterceptor` objects.
 *
 * @publicApi
 */
const HTTP_INTERCEPTORS = new InjectionToken(ngDevMode ? 'HTTP_INTERCEPTORS' : '');
/**
 * A multi-provided token of `HttpInterceptorFn`s.
 */
const HTTP_INTERCEPTOR_FNS = new InjectionToken(ngDevMode ? 'HTTP_INTERCEPTOR_FNS' : '');
/**
 * A multi-provided token of `HttpInterceptorFn`s that are only set in root.
 */
const HTTP_ROOT_INTERCEPTOR_FNS = new InjectionToken(ngDevMode ? 'HTTP_ROOT_INTERCEPTOR_FNS' : '');
/**
 * Creates an `HttpInterceptorFn` which lazily initializes an interceptor chain from the legacy
 * class-based interceptors and runs the request through it.
 */
function legacyInterceptorFnFactory() {
    let chain = null;
    return (req, handler) => {
        if (chain === null) {
            const interceptors = inject(HTTP_INTERCEPTORS, { optional: true }) ?? [];
            // Note: interceptors are wrapped right-to-left so that final execution order is
            // left-to-right. That is, if `interceptors` is the array `[a, b, c]`, we want to
            // produce a chain that is conceptually `c(b(a(end)))`, which we build from the inside
            // out.
            chain = interceptors.reduceRight(adaptLegacyInterceptorToChain, interceptorChainEndFn);
        }
        const pendingTasks = inject(ɵInitialRenderPendingTasks);
        const taskId = pendingTasks.add();
        return chain(req, handler).pipe(finalize(() => pendingTasks.remove(taskId)));
    };
}
class HttpInterceptorHandler extends HttpHandler {
    constructor(backend, injector) {
        super();
        this.backend = backend;
        this.injector = injector;
        this.chain = null;
        this.pendingTasks = inject(ɵInitialRenderPendingTasks);
    }
    handle(initialRequest) {
        if (this.chain === null) {
            const dedupedInterceptorFns = Array.from(new Set([
                ...this.injector.get(HTTP_INTERCEPTOR_FNS),
                ...this.injector.get(HTTP_ROOT_INTERCEPTOR_FNS, []),
            ]));
            // Note: interceptors are wrapped right-to-left so that final execution order is
            // left-to-right. That is, if `dedupedInterceptorFns` is the array `[a, b, c]`, we want to
            // produce a chain that is conceptually `c(b(a(end)))`, which we build from the inside
            // out.
            this.chain = dedupedInterceptorFns.reduceRight((nextSequencedFn, interceptorFn) => chainedInterceptorFn(nextSequencedFn, interceptorFn, this.injector), interceptorChainEndFn);
        }
        const taskId = this.pendingTasks.add();
        return this.chain(initialRequest, downstreamRequest => this.backend.handle(downstreamRequest))
            .pipe(finalize(() => this.pendingTasks.remove(taskId)));
    }
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpInterceptorHandler, deps: [{ token: HttpBackend }, { token: i0.EnvironmentInjector }], target: i0.ɵɵFactoryTarget.Injectable }); }
    static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpInterceptorHandler }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpInterceptorHandler, decorators: [{
            type: Injectable
        }], ctorParameters: function () { return [{ type: HttpBackend }, { type: i0.EnvironmentInjector }]; } });

// Every request made through JSONP needs a callback name that's unique across the
// whole page. Each request is assigned an id and the callback name is constructed
// from that. The next id to be assigned is tracked in a global variable here that
// is shared among all applications on the page.
let nextRequestId = 0;
/**
 * When a pending <script> is unsubscribed we'll move it to this document, so it won't be
 * executed.
 */
let foreignDocument;
// Error text given when a JSONP script is injected, but doesn't invoke the callback
// passed in its URL.
const JSONP_ERR_NO_CALLBACK = 'JSONP injected script did not invoke callback.';
// Error text given when a request is passed to the JsonpClientBackend that doesn't
// have a request method JSONP.
const JSONP_ERR_WRONG_METHOD = 'JSONP requests must use JSONP request method.';
const JSONP_ERR_WRONG_RESPONSE_TYPE = 'JSONP requests must use Json response type.';
// Error text given when a request is passed to the JsonpClientBackend that has
// headers set
const JSONP_ERR_HEADERS_NOT_SUPPORTED = 'JSONP requests do not support headers.';
/**
 * DI token/abstract type representing a map of JSONP callbacks.
 *
 * In the browser, this should always be the `window` object.
 *
 *
 */
class JsonpCallbackContext {
}
/**
 * Factory function that determines where to store JSONP callbacks.
 *
 * Ordinarily JSONP callbacks are stored on the `window` object, but this may not exist
 * in test environments. In that case, callbacks are stored on an anonymous object instead.
 *
 *
 */
function jsonpCallbackContext() {
    if (typeof window === 'object') {
        return window;
    }
    return {};
}
/**
 * Processes an `HttpRequest` with the JSONP method,
 * by performing JSONP style requests.
 * @see {@link HttpHandler}
 * @see {@link HttpXhrBackend}
 *
 * @publicApi
 */
class JsonpClientBackend {
    constructor(callbackMap, document) {
        this.callbackMap = callbackMap;
        this.document = document;
        /**
         * A resolved promise that can be used to schedule microtasks in the event handlers.
         */
        this.resolvedPromise = Promise.resolve();
    }
    /**
     * Get the name of the next callback method, by incrementing the global `nextRequestId`.
     */
    nextCallback() {
        return `ng_jsonp_callback_${nextRequestId++}`;
    }
    /**
     * Processes a JSONP request and returns an event stream of the results.
     * @param req The request object.
     * @returns An observable of the response events.
     *
     */
    handle(req) {
        // Firstly, check both the method and response type. If either doesn't match
        // then the request was improperly routed here and cannot be handled.
        if (req.method !== 'JSONP') {
            throw new Error(JSONP_ERR_WRONG_METHOD);
        }
        else if (req.responseType !== 'json') {
            throw new Error(JSONP_ERR_WRONG_RESPONSE_TYPE);
        }
        // Check the request headers. JSONP doesn't support headers and
        // cannot set any that were supplied.
        if (req.headers.keys().length > 0) {
            throw new Error(JSONP_ERR_HEADERS_NOT_SUPPORTED);
        }
        // Everything else happens inside the Observable boundary.
        return new Observable((observer) => {
            // The first step to make a request is to generate the callback name, and replace the
            // callback placeholder in the URL with the name. Care has to be taken here to ensure
            // a trailing &, if matched, gets inserted back into the URL in the correct place.
            const callback = this.nextCallback();
            const url = req.urlWithParams.replace(/=JSONP_CALLBACK(&|$)/, `=${callback}$1`);
            // Construct the <script> tag and point it at the URL.
            const node = this.document.createElement('script');
            node.src = url;
            // A JSONP request requires waiting for multiple callbacks. These variables
            // are closed over and track state across those callbacks.
            // The response object, if one has been received, or null otherwise.
            let body = null;
            // Whether the response callback has been called.
            let finished = false;
            // Set the response callback in this.callbackMap (which will be the window
            // object in the browser. The script being loaded via the <script> tag will
            // eventually call this callback.
            this.callbackMap[callback] = (data) => {
                // Data has been received from the JSONP script. Firstly, delete this callback.
                delete this.callbackMap[callback];
                // Set state to indicate data was received.
                body = data;
                finished = true;
            };
            // cleanup() is a utility closure that removes the <script> from the page and
            // the response callback from the window. This logic is used in both the
            // success, error, and cancellation paths, so it's extracted out for convenience.
            const cleanup = () => {
                // Remove the <script> tag if it's still on the page.
                if (node.parentNode) {
                    node.parentNode.removeChild(node);
                }
                // Remove the response callback from the callbackMap (window object in the
                // browser).
                delete this.callbackMap[callback];
            };
            // onLoad() is the success callback which runs after the response callback
            // if the JSONP script loads successfully. The event itself is unimportant.
            // If something went wrong, onLoad() may run without the response callback
            // having been invoked.
            const onLoad = (event) => {
                // We wrap it in an extra Promise, to ensure the microtask
                // is scheduled after the loaded endpoint has executed any potential microtask itself,
                // which is not guaranteed in Internet Explorer and EdgeHTML. See issue #39496
                this.resolvedPromise.then(() => {
                    // Cleanup the page.
                    cleanup();
                    // Check whether the response callback has run.
                    if (!finished) {
                        // It hasn't, something went wrong with the request. Return an error via
                        // the Observable error path. All JSONP errors have status 0.
                        observer.error(new HttpErrorResponse({
                            url,
                            status: 0,
                            statusText: 'JSONP Error',
                            error: new Error(JSONP_ERR_NO_CALLBACK),
                        }));
                        return;
                    }
                    // Success. body either contains the response body or null if none was
                    // returned.
                    observer.next(new HttpResponse({
                        body,
                        status: 200 /* HttpStatusCode.Ok */,
                        statusText: 'OK',
                        url,
                    }));
                    // Complete the stream, the response is over.
                    observer.complete();
                });
            };
            // onError() is the error callback, which runs if the script returned generates
            // a Javascript error. It emits the error via the Observable error channel as
            // a HttpErrorResponse.
            const onError = (error) => {
                cleanup();
                // Wrap the error in a HttpErrorResponse.
                observer.error(new HttpErrorResponse({
                    error,
                    status: 0,
                    statusText: 'JSONP Error',
                    url,
                }));
            };
            // Subscribe to both the success (load) and error events on the <script> tag,
            // and add it to the page.
            node.addEventListener('load', onLoad);
            node.addEventListener('error', onError);
            this.document.body.appendChild(node);
            // The request has now been successfully sent.
            observer.next({ type: HttpEventType.Sent });
            // Cancellation handler.
            return () => {
                if (!finished) {
                    this.removeListeners(node);
                }
                // And finally, clean up the page.
                cleanup();
            };
        });
    }
    removeListeners(script) {
        // Issue #34818
        // Changing <script>'s ownerDocument will prevent it from execution.
        // https://html.spec.whatwg.org/multipage/scripting.html#execute-the-script-block
        if (!foreignDocument) {
            foreignDocument = this.document.implementation.createHTMLDocument();
        }
        foreignDocument.adoptNode(script);
    }
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: JsonpClientBackend, deps: [{ token: JsonpCallbackContext }, { token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable }); }
    static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: JsonpClientBackend }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: JsonpClientBackend, decorators: [{
            type: Injectable
        }], ctorParameters: function () { return [{ type: JsonpCallbackContext }, { type: undefined, decorators: [{
                    type: Inject,
                    args: [DOCUMENT]
                }] }]; } });
/**
 * Identifies requests with the method JSONP and shifts them to the `JsonpClientBackend`.
 */
function jsonpInterceptorFn(req, next) {
    if (req.method === 'JSONP') {
        return inject(JsonpClientBackend).handle(req);
    }
    // Fall through for normal HTTP requests.
    return next(req);
}
/**
 * Identifies requests with the method JSONP and
 * shifts them to the `JsonpClientBackend`.
 *
 * @see {@link HttpInterceptor}
 *
 * @publicApi
 */
class JsonpInterceptor {
    constructor(injector) {
        this.injector = injector;
    }
    /**
     * Identifies and handles a given JSONP request.
     * @param initialRequest The outgoing request object to handle.
     * @param next The next interceptor in the chain, or the backend
     * if no interceptors remain in the chain.
     * @returns An observable of the event stream.
     */
    intercept(initialRequest, next) {
        return this.injector.runInContext(() => jsonpInterceptorFn(initialRequest, downstreamRequest => next.handle(downstreamRequest)));
    }
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: JsonpInterceptor, deps: [{ token: i0.EnvironmentInjector }], target: i0.ɵɵFactoryTarget.Injectable }); }
    static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: JsonpInterceptor }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: JsonpInterceptor, decorators: [{
            type: Injectable
        }], ctorParameters: function () { return [{ type: i0.EnvironmentInjector }]; } });

const XSSI_PREFIX = /^\)\]\}',?\n/;
/**
 * Determine an appropriate URL for the response, by checking either
 * XMLHttpRequest.responseURL or the X-Request-URL header.
 */
function getResponseUrl(xhr) {
    if ('responseURL' in xhr && xhr.responseURL) {
        return xhr.responseURL;
    }
    if (/^X-Request-URL:/m.test(xhr.getAllResponseHeaders())) {
        return xhr.getResponseHeader('X-Request-URL');
    }
    return null;
}
/**
 * Uses `XMLHttpRequest` to send requests to a backend server.
 * @see {@link HttpHandler}
 * @see {@link JsonpClientBackend}
 *
 * @publicApi
 */
class HttpXhrBackend {
    constructor(xhrFactory) {
        this.xhrFactory = xhrFactory;
    }
    /**
     * Processes a request and returns a stream of response events.
     * @param req The request object.
     * @returns An observable of the response events.
     */
    handle(req) {
        // Quick check to give a better error message when a user attempts to use
        // HttpClient.jsonp() without installing the HttpClientJsonpModule
        if (req.method === 'JSONP') {
            throw new ɵRuntimeError(-2800 /* RuntimeErrorCode.MISSING_JSONP_MODULE */, (typeof ngDevMode === 'undefined' || ngDevMode) &&
                `Cannot make a JSONP request without JSONP support. To fix the problem, either add the \`withJsonpSupport()\` call (if \`provideHttpClient()\` is used) or import the \`HttpClientJsonpModule\` in the root NgModule.`);
        }
        // Check whether this factory has a special function to load an XHR implementation
        // for various non-browser environments. We currently limit it to only `ServerXhr`
        // class, which needs to load an XHR implementation.
        const xhrFactory = this.xhrFactory;
        const source = xhrFactory.ɵloadImpl ? from(xhrFactory.ɵloadImpl()) : of(null);
        return source.pipe(switchMap(() => {
            // Everything happens on Observable subscription.
            return new Observable((observer) => {
                // Start by setting up the XHR object with request method, URL, and withCredentials
                // flag.
                const xhr = xhrFactory.build();
                xhr.open(req.method, req.urlWithParams);
                if (req.withCredentials) {
                    xhr.withCredentials = true;
                }
                // Add all the requested headers.
                req.headers.forEach((name, values) => xhr.setRequestHeader(name, values.join(',')));
                // Add an Accept header if one isn't present already.
                if (!req.headers.has('Accept')) {
                    xhr.setRequestHeader('Accept', 'application/json, text/plain, */*');
                }
                // Auto-detect the Content-Type header if one isn't present already.
                if (!req.headers.has('Content-Type')) {
                    const detectedType = req.detectContentTypeHeader();
                    // Sometimes Content-Type detection fails.
                    if (detectedType !== null) {
                        xhr.setRequestHeader('Content-Type', detectedType);
                    }
                }
                // Set the responseType if one was requested.
                if (req.responseType) {
                    const responseType = req.responseType.toLowerCase();
                    // JSON responses need to be processed as text. This is because if the server
                    // returns an XSSI-prefixed JSON response, the browser will fail to parse it,
                    // xhr.response will be null, and xhr.responseText cannot be accessed to
                    // retrieve the prefixed JSON data in order to strip the prefix. Thus, all JSON
                    // is parsed by first requesting text and then applying JSON.parse.
                    xhr.responseType = ((responseType !== 'json') ? responseType : 'text');
                }
                // Serialize the request body if one is present. If not, this will be set to null.
                const reqBody = req.serializeBody();
                // If progress events are enabled, response headers will be delivered
                // in two events - the HttpHeaderResponse event and the full HttpResponse
                // event. However, since response headers don't change in between these
                // two events, it doesn't make sense to parse them twice. So headerResponse
                // caches the data extracted from the response whenever it's first parsed,
                // to ensure parsing isn't duplicated.
                let headerResponse = null;
                // partialFromXhr extracts the HttpHeaderResponse from the current XMLHttpRequest
                // state, and memoizes it into headerResponse.
                const partialFromXhr = () => {
                    if (headerResponse !== null) {
                        return headerResponse;
                    }
                    const statusText = xhr.statusText || 'OK';
                    // Parse headers from XMLHttpRequest - this step is lazy.
                    const headers = new HttpHeaders(xhr.getAllResponseHeaders());
                    // Read the response URL from the XMLHttpResponse instance and fall back on the
                    // request URL.
                    const url = getResponseUrl(xhr) || req.url;
                    // Construct the HttpHeaderResponse and memoize it.
                    headerResponse =
                        new HttpHeaderResponse({ headers, status: xhr.status, statusText, url });
                    return headerResponse;
                };
                // Next, a few closures are defined for the various events which XMLHttpRequest can
                // emit. This allows them to be unregistered as event listeners later.
                // First up is the load event, which represents a response being fully available.
                const onLoad = () => {
                    // Read response state from the memoized partial data.
                    let { headers, status, statusText, url } = partialFromXhr();
                    // The body will be read out if present.
                    let body = null;
                    if (status !== 204 /* HttpStatusCode.NoContent */) {
                        // Use XMLHttpRequest.response if set, responseText otherwise.
                        body = (typeof xhr.response === 'undefined') ? xhr.responseText : xhr.response;
                    }
                    // Normalize another potential bug (this one comes from CORS).
                    if (status === 0) {
                        status = !!body ? 200 /* HttpStatusCode.Ok */ : 0;
                    }
                    // ok determines whether the response will be transmitted on the event or
                    // error channel. Unsuccessful status codes (not 2xx) will always be errors,
                    // but a successful status code can still result in an error if the user
                    // asked for JSON data and the body cannot be parsed as such.
                    let ok = status >= 200 && status < 300;
                    // Check whether the body needs to be parsed as JSON (in many cases the browser
                    // will have done that already).
                    if (req.responseType === 'json' && typeof body === 'string') {
                        // Save the original body, before attempting XSSI prefix stripping.
                        const originalBody = body;
                        body = body.replace(XSSI_PREFIX, '');
                        try {
                            // Attempt the parse. If it fails, a parse error should be delivered to the
                            // user.
                            body = body !== '' ? JSON.parse(body) : null;
                        }
                        catch (error) {
                            // Since the JSON.parse failed, it's reasonable to assume this might not have
                            // been a JSON response. Restore the original body (including any XSSI prefix)
                            // to deliver a better error response.
                            body = originalBody;
                            // If this was an error request to begin with, leave it as a string, it
                            // probably just isn't JSON. Otherwise, deliver the parsing error to the user.
                            if (ok) {
                                // Even though the response status was 2xx, this is still an error.
                                ok = false;
                                // The parse error contains the text of the body that failed to parse.
                                body = { error, text: body };
                            }
                        }
                    }
                    if (ok) {
                        // A successful response is delivered on the event stream.
                        observer.next(new HttpResponse({
                            body,
                            headers,
                            status,
                            statusText,
                            url: url || undefined,
                        }));
                        // The full body has been received and delivered, no further events
                        // are possible. This request is complete.
                        observer.complete();
                    }
                    else {
                        // An unsuccessful request is delivered on the error channel.
                        observer.error(new HttpErrorResponse({
                            // The error in this case is the response body (error from the server).
                            error: body,
                            headers,
                            status,
                            statusText,
                            url: url || undefined,
                        }));
                    }
                };
                // The onError callback is called when something goes wrong at the network level.
                // Connection timeout, DNS error, offline, etc. These are actual errors, and are
                // transmitted on the error channel.
                const onError = (error) => {
                    const { url } = partialFromXhr();
                    const res = new HttpErrorResponse({
                        error,
                        status: xhr.status || 0,
                        statusText: xhr.statusText || 'Unknown Error',
                        url: url || undefined,
                    });
                    observer.error(res);
                };
                // The sentHeaders flag tracks whether the HttpResponseHeaders event
                // has been sent on the stream. This is necessary to track if progress
                // is enabled since the event will be sent on only the first download
                // progress event.
                let sentHeaders = false;
                // The download progress event handler, which is only registered if
                // progress events are enabled.
                const onDownProgress = (event) => {
                    // Send the HttpResponseHeaders event if it hasn't been sent already.
                    if (!sentHeaders) {
                        observer.next(partialFromXhr());
                        sentHeaders = true;
                    }
                    // Start building the download progress event to deliver on the response
                    // event stream.
                    let progressEvent = {
                        type: HttpEventType.DownloadProgress,
                        loaded: event.loaded,
                    };
                    // Set the total number of bytes in the event if it's available.
                    if (event.lengthComputable) {
                        progressEvent.total = event.total;
                    }
                    // If the request was for text content and a partial response is
                    // available on XMLHttpRequest, include it in the progress event
                    // to allow for streaming reads.
                    if (req.responseType === 'text' && !!xhr.responseText) {
                        progressEvent.partialText = xhr.responseText;
                    }
                    // Finally, fire the event.
                    observer.next(progressEvent);
                };
                // The upload progress event handler, which is only registered if
                // progress events are enabled.
                const onUpProgress = (event) => {
                    // Upload progress events are simpler. Begin building the progress
                    // event.
                    let progress = {
                        type: HttpEventType.UploadProgress,
                        loaded: event.loaded,
                    };
                    // If the total number of bytes being uploaded is available, include
                    // it.
                    if (event.lengthComputable) {
                        progress.total = event.total;
                    }
                    // Send the event.
                    observer.next(progress);
                };
                // By default, register for load and error events.
                xhr.addEventListener('load', onLoad);
                xhr.addEventListener('error', onError);
                xhr.addEventListener('timeout', onError);
                xhr.addEventListener('abort', onError);
                // Progress events are only enabled if requested.
                if (req.reportProgress) {
                    // Download progress is always enabled if requested.
                    xhr.addEventListener('progress', onDownProgress);
                    // Upload progress depends on whether there is a body to upload.
                    if (reqBody !== null && xhr.upload) {
                        xhr.upload.addEventListener('progress', onUpProgress);
                    }
                }
                // Fire the request, and notify the event stream that it was fired.
                xhr.send(reqBody);
                observer.next({ type: HttpEventType.Sent });
                // This is the return from the Observable function, which is the
                // request cancellation handler.
                return () => {
                    // On a cancellation, remove all registered event listeners.
                    xhr.removeEventListener('error', onError);
                    xhr.removeEventListener('abort', onError);
                    xhr.removeEventListener('load', onLoad);
                    xhr.removeEventListener('timeout', onError);
                    if (req.reportProgress) {
                        xhr.removeEventListener('progress', onDownProgress);
                        if (reqBody !== null && xhr.upload) {
                            xhr.upload.removeEventListener('progress', onUpProgress);
                        }
                    }
                    // Finally, abort the in-flight request.
                    if (xhr.readyState !== xhr.DONE) {
                        xhr.abort();
                    }
                };
            });
        }));
    }
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpXhrBackend, deps: [{ token: i1.XhrFactory }], target: i0.ɵɵFactoryTarget.Injectable }); }
    static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpXhrBackend }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpXhrBackend, decorators: [{
            type: Injectable
        }], ctorParameters: function () { return [{ type: i1.XhrFactory }]; } });

const XSRF_ENABLED = new InjectionToken('XSRF_ENABLED');
const XSRF_DEFAULT_COOKIE_NAME = 'XSRF-TOKEN';
const XSRF_COOKIE_NAME = new InjectionToken('XSRF_COOKIE_NAME', {
    providedIn: 'root',
    factory: () => XSRF_DEFAULT_COOKIE_NAME,
});
const XSRF_DEFAULT_HEADER_NAME = 'X-XSRF-TOKEN';
const XSRF_HEADER_NAME = new InjectionToken('XSRF_HEADER_NAME', {
    providedIn: 'root',
    factory: () => XSRF_DEFAULT_HEADER_NAME,
});
/**
 * Retrieves the current XSRF token to use with the next outgoing request.
 *
 * @publicApi
 */
class HttpXsrfTokenExtractor {
}
/**
 * `HttpXsrfTokenExtractor` which retrieves the token from a cookie.
 */
class HttpXsrfCookieExtractor {
    constructor(doc, platform, cookieName) {
        this.doc = doc;
        this.platform = platform;
        this.cookieName = cookieName;
        this.lastCookieString = '';
        this.lastToken = null;
        /**
         * @internal for testing
         */
        this.parseCount = 0;
    }
    getToken() {
        if (this.platform === 'server') {
            return null;
        }
        const cookieString = this.doc.cookie || '';
        if (cookieString !== this.lastCookieString) {
            this.parseCount++;
            this.lastToken = ɵparseCookieValue(cookieString, this.cookieName);
            this.lastCookieString = cookieString;
        }
        return this.lastToken;
    }
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpXsrfCookieExtractor, deps: [{ token: DOCUMENT }, { token: PLATFORM_ID }, { token: XSRF_COOKIE_NAME }], target: i0.ɵɵFactoryTarget.Injectable }); }
    static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpXsrfCookieExtractor }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpXsrfCookieExtractor, decorators: [{
            type: Injectable
        }], ctorParameters: function () { return [{ type: undefined, decorators: [{
                    type: Inject,
                    args: [DOCUMENT]
                }] }, { type: undefined, decorators: [{
                    type: Inject,
                    args: [PLATFORM_ID]
                }] }, { type: undefined, decorators: [{
                    type: Inject,
                    args: [XSRF_COOKIE_NAME]
                }] }]; } });
function xsrfInterceptorFn(req, next) {
    const lcUrl = req.url.toLowerCase();
    // Skip both non-mutating requests and absolute URLs.
    // Non-mutating requests don't require a token, and absolute URLs require special handling
    // anyway as the cookie set
    // on our origin is not the same as the token expected by another origin.
    if (!inject(XSRF_ENABLED) || req.method === 'GET' || req.method === 'HEAD' ||
        lcUrl.startsWith('http://') || lcUrl.startsWith('https://')) {
        return next(req);
    }
    const token = inject(HttpXsrfTokenExtractor).getToken();
    const headerName = inject(XSRF_HEADER_NAME);
    // Be careful not to overwrite an existing header of the same name.
    if (token != null && !req.headers.has(headerName)) {
        req = req.clone({ headers: req.headers.set(headerName, token) });
    }
    return next(req);
}
/**
 * `HttpInterceptor` which adds an XSRF token to eligible outgoing requests.
 */
class HttpXsrfInterceptor {
    constructor(injector) {
        this.injector = injector;
    }
    intercept(initialRequest, next) {
        return this.injector.runInContext(() => xsrfInterceptorFn(initialRequest, downstreamRequest => next.handle(downstreamRequest)));
    }
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpXsrfInterceptor, deps: [{ token: i0.EnvironmentInjector }], target: i0.ɵɵFactoryTarget.Injectable }); }
    static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpXsrfInterceptor }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpXsrfInterceptor, decorators: [{
            type: Injectable
        }], ctorParameters: function () { return [{ type: i0.EnvironmentInjector }]; } });

/**
 * Identifies a particular kind of `HttpFeature`.
 *
 * @publicApi
 */
var HttpFeatureKind;
(function (HttpFeatureKind) {
    HttpFeatureKind[HttpFeatureKind["Interceptors"] = 0] = "Interceptors";
    HttpFeatureKind[HttpFeatureKind["LegacyInterceptors"] = 1] = "LegacyInterceptors";
    HttpFeatureKind[HttpFeatureKind["CustomXsrfConfiguration"] = 2] = "CustomXsrfConfiguration";
    HttpFeatureKind[HttpFeatureKind["NoXsrfProtection"] = 3] = "NoXsrfProtection";
    HttpFeatureKind[HttpFeatureKind["JsonpSupport"] = 4] = "JsonpSupport";
    HttpFeatureKind[HttpFeatureKind["RequestsMadeViaParent"] = 5] = "RequestsMadeViaParent";
    HttpFeatureKind[HttpFeatureKind["Fetch"] = 6] = "Fetch";
})(HttpFeatureKind || (HttpFeatureKind = {}));
function makeHttpFeature(kind, providers) {
    return {
        ɵkind: kind,
        ɵproviders: providers,
    };
}
/**
 * Configures Angular's `HttpClient` service to be available for injection.
 *
 * By default, `HttpClient` will be configured for injection with its default options for XSRF
 * protection of outgoing requests. Additional configuration options can be provided by passing
 * feature functions to `provideHttpClient`. For example, HTTP interceptors can be added using the
 * `withInterceptors(...)` feature.
 *
 * @see {@link withInterceptors}
 * @see {@link withInterceptorsFromDi}
 * @see {@link withXsrfConfiguration}
 * @see {@link withNoXsrfProtection}
 * @see {@link withJsonpSupport}
 * @see {@link withRequestsMadeViaParent}
 * @see {@link withFetch}
 */
function provideHttpClient(...features) {
    if (ngDevMode) {
        const featureKinds = new Set(features.map(f => f.ɵkind));
        if (featureKinds.has(HttpFeatureKind.NoXsrfProtection) &&
            featureKinds.has(HttpFeatureKind.CustomXsrfConfiguration)) {
            throw new Error(ngDevMode ?
                `Configuration error: found both withXsrfConfiguration() and withNoXsrfProtection() in the same call to provideHttpClient(), which is a contradiction.` :
                '');
        }
    }
    const providers = [
        HttpClient,
        HttpXhrBackend,
        HttpInterceptorHandler,
        { provide: HttpHandler, useExisting: HttpInterceptorHandler },
        { provide: HttpBackend, useExisting: HttpXhrBackend },
        {
            provide: HTTP_INTERCEPTOR_FNS,
            useValue: xsrfInterceptorFn,
            multi: true,
        },
        { provide: XSRF_ENABLED, useValue: true },
        { provide: HttpXsrfTokenExtractor, useClass: HttpXsrfCookieExtractor },
    ];
    for (const feature of features) {
        providers.push(...feature.ɵproviders);
    }
    return makeEnvironmentProviders(providers);
}
/**
 * Adds one or more functional-style HTTP interceptors to the configuration of the `HttpClient`
 * instance.
 *
 * @see {@link HttpInterceptorFn}
 * @see {@link provideHttpClient}
 * @publicApi
 */
function withInterceptors(interceptorFns) {
    return makeHttpFeature(HttpFeatureKind.Interceptors, interceptorFns.map(interceptorFn => {
        return {
            provide: HTTP_INTERCEPTOR_FNS,
            useValue: interceptorFn,
            multi: true,
        };
    }));
}
const LEGACY_INTERCEPTOR_FN = new InjectionToken('LEGACY_INTERCEPTOR_FN');
/**
 * Includes class-based interceptors configured using a multi-provider in the current injector into
 * the configured `HttpClient` instance.
 *
 * Prefer `withInterceptors` and functional interceptors instead, as support for DI-provided
 * interceptors may be phased out in a later release.
 *
 * @see {@link HttpInterceptor}
 * @see {@link HTTP_INTERCEPTORS}
 * @see {@link provideHttpClient}
 */
function withInterceptorsFromDi() {
    // Note: the legacy interceptor function is provided here via an intermediate token
    // (`LEGACY_INTERCEPTOR_FN`), using a pattern which guarantees that if these providers are
    // included multiple times, all of the multi-provider entries will have the same instance of the
    // interceptor function. That way, the `HttpINterceptorHandler` will dedup them and legacy
    // interceptors will not run multiple times.
    return makeHttpFeature(HttpFeatureKind.LegacyInterceptors, [
        {
            provide: LEGACY_INTERCEPTOR_FN,
            useFactory: legacyInterceptorFnFactory,
        },
        {
            provide: HTTP_INTERCEPTOR_FNS,
            useExisting: LEGACY_INTERCEPTOR_FN,
            multi: true,
        }
    ]);
}
/**
 * Customizes the XSRF protection for the configuration of the current `HttpClient` instance.
 *
 * This feature is incompatible with the `withNoXsrfProtection` feature.
 *
 * @see {@link provideHttpClient}
 */
function withXsrfConfiguration({ cookieName, headerName }) {
    const providers = [];
    if (cookieName !== undefined) {
        providers.push({ provide: XSRF_COOKIE_NAME, useValue: cookieName });
    }
    if (headerName !== undefined) {
        providers.push({ provide: XSRF_HEADER_NAME, useValue: headerName });
    }
    return makeHttpFeature(HttpFeatureKind.CustomXsrfConfiguration, providers);
}
/**
 * Disables XSRF protection in the configuration of the current `HttpClient` instance.
 *
 * This feature is incompatible with the `withXsrfConfiguration` feature.
 *
 * @see {@link provideHttpClient}
 */
function withNoXsrfProtection() {
    return makeHttpFeature(HttpFeatureKind.NoXsrfProtection, [
        {
            provide: XSRF_ENABLED,
            useValue: false,
        },
    ]);
}
/**
 * Add JSONP support to the configuration of the current `HttpClient` instance.
 *
 * @see {@link provideHttpClient}
 */
function withJsonpSupport() {
    return makeHttpFeature(HttpFeatureKind.JsonpSupport, [
        JsonpClientBackend,
        { provide: JsonpCallbackContext, useFactory: jsonpCallbackContext },
        { provide: HTTP_INTERCEPTOR_FNS, useValue: jsonpInterceptorFn, multi: true },
    ]);
}
/**
 * Configures the current `HttpClient` instance to make requests via the parent injector's
 * `HttpClient` instead of directly.
 *
 * By default, `provideHttpClient` configures `HttpClient` in its injector to be an independent
 * instance. For example, even if `HttpClient` is configured in the parent injector with
 * one or more interceptors, they will not intercept requests made via this instance.
 *
 * With this option enabled, once the request has passed through the current injector's
 * interceptors, it will be delegated to the parent injector's `HttpClient` chain instead of
 * dispatched directly, and interceptors in the parent configuration will be applied to the request.
 *
 * If there are several `HttpClient` instances in the injector hierarchy, it's possible for
 * `withRequestsMadeViaParent` to be used at multiple levels, which will cause the request to
 * "bubble up" until either reaching the root level or an `HttpClient` which was not configured with
 * this option.
 *
 * @see {@link provideHttpClient}
 * @developerPreview
 */
function withRequestsMadeViaParent() {
    return makeHttpFeature(HttpFeatureKind.RequestsMadeViaParent, [
        {
            provide: HttpBackend,
            useFactory: () => {
                const handlerFromParent = inject(HttpHandler, { skipSelf: true, optional: true });
                if (ngDevMode && handlerFromParent === null) {
                    throw new Error('withRequestsMadeViaParent() can only be used when the parent injector also configures HttpClient');
                }
                return handlerFromParent;
            },
        },
    ]);
}
/**
 * Configures the current `HttpClient` instance to make requests using the fetch API.
 *
 * This `FetchBackend` requires the support of the Fetch API which is available on all evergreen
 * browsers and on NodeJS from v18 onward.
 *
 * Note: The Fetch API doesn't support progress report on uploads.
 *
 * @publicApi
 * @developerPreview
 */
function withFetch() {
    if ((typeof ngDevMode === 'undefined' || ngDevMode) && typeof fetch !== 'function') {
        // TODO: Create a runtime error
        // TODO: Use ENVIRONMENT_INITIALIZER to contextualize the error message (browser or server)
        throw new Error('The `withFetch` feature of HttpClient requires the `fetch` API to be available. ' +
            'If you run the code in a Node environment, make sure you use Node v18.10 or later.');
    }
    return makeHttpFeature(HttpFeatureKind.Fetch, [
        FetchBackend,
        { provide: HttpBackend, useExisting: FetchBackend },
    ]);
}

/**
 * Configures XSRF protection support for outgoing requests.
 *
 * For a server that supports a cookie-based XSRF protection system,
 * use directly to configure XSRF protection with the correct
 * cookie and header names.
 *
 * If no names are supplied, the default cookie name is `XSRF-TOKEN`
 * and the default header name is `X-XSRF-TOKEN`.
 *
 * @publicApi
 */
class HttpClientXsrfModule {
    /**
     * Disable the default XSRF protection.
     */
    static disable() {
        return {
            ngModule: HttpClientXsrfModule,
            providers: [
                withNoXsrfProtection().ɵproviders,
            ],
        };
    }
    /**
     * Configure XSRF protection.
     * @param options An object that can specify either or both
     * cookie name or header name.
     * - Cookie name default is `XSRF-TOKEN`.
     * - Header name default is `X-XSRF-TOKEN`.
     *
     */
    static withOptions(options = {}) {
        return {
            ngModule: HttpClientXsrfModule,
            providers: withXsrfConfiguration(options).ɵproviders,
        };
    }
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpClientXsrfModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule }); }
    static { this.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: "14.0.0", version: "16.2.9", ngImport: i0, type: HttpClientXsrfModule }); }
    static { this.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpClientXsrfModule, providers: [
            HttpXsrfInterceptor,
            { provide: HTTP_INTERCEPTORS, useExisting: HttpXsrfInterceptor, multi: true },
            { provide: HttpXsrfTokenExtractor, useClass: HttpXsrfCookieExtractor },
            withXsrfConfiguration({
                cookieName: XSRF_DEFAULT_COOKIE_NAME,
                headerName: XSRF_DEFAULT_HEADER_NAME,
            }).ɵproviders,
            { provide: XSRF_ENABLED, useValue: true },
        ] }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpClientXsrfModule, decorators: [{
            type: NgModule,
            args: [{
                    providers: [
                        HttpXsrfInterceptor,
                        { provide: HTTP_INTERCEPTORS, useExisting: HttpXsrfInterceptor, multi: true },
                        { provide: HttpXsrfTokenExtractor, useClass: HttpXsrfCookieExtractor },
                        withXsrfConfiguration({
                            cookieName: XSRF_DEFAULT_COOKIE_NAME,
                            headerName: XSRF_DEFAULT_HEADER_NAME,
                        }).ɵproviders,
                        { provide: XSRF_ENABLED, useValue: true },
                    ],
                }]
        }] });
/**
 * Configures the [dependency injector](guide/glossary#injector) for `HttpClient`
 * with supporting services for XSRF. Automatically imported by `HttpClientModule`.
 *
 * You can add interceptors to the chain behind `HttpClient` by binding them to the
 * multiprovider for built-in [DI token](guide/glossary#di-token) `HTTP_INTERCEPTORS`.
 *
 * @publicApi
 */
class HttpClientModule {
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpClientModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule }); }
    static { this.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: "14.0.0", version: "16.2.9", ngImport: i0, type: HttpClientModule }); }
    static { this.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpClientModule, providers: [
            provideHttpClient(withInterceptorsFromDi()),
        ] }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpClientModule, decorators: [{
            type: NgModule,
            args: [{
                    /**
                     * Configures the [dependency injector](guide/glossary#injector) where it is imported
                     * with supporting services for HTTP communications.
                     */
                    providers: [
                        provideHttpClient(withInterceptorsFromDi()),
                    ],
                }]
        }] });
/**
 * Configures the [dependency injector](guide/glossary#injector) for `HttpClient`
 * with supporting services for JSONP.
 * Without this module, Jsonp requests reach the backend
 * with method JSONP, where they are rejected.
 *
 * @publicApi
 */
class HttpClientJsonpModule {
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpClientJsonpModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule }); }
    static { this.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: "14.0.0", version: "16.2.9", ngImport: i0, type: HttpClientJsonpModule }); }
    static { this.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpClientJsonpModule, providers: [
            withJsonpSupport().ɵproviders,
        ] }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.9", ngImport: i0, type: HttpClientJsonpModule, decorators: [{
            type: NgModule,
            args: [{
                    providers: [
                        withJsonpSupport().ɵproviders,
                    ],
                }]
        }] });

const CACHE_STATE = new InjectionToken(ngDevMode ? 'HTTP_TRANSFER_STATE_CACHE_STATE' : '');
/**
 * A list of allowed HTTP methods to cache.
 */
const ALLOWED_METHODS = ['GET', 'HEAD'];
function transferCacheInterceptorFn(req, next) {
    const { isCacheActive } = inject(CACHE_STATE);
    // Stop using the cache if the application has stabilized, indicating initial rendering
    // is complete.
    if (!isCacheActive || !ALLOWED_METHODS.includes(req.method)) {
        // Cache is no longer active or method is not HEAD or GET.
        // Pass the request through.
        return next(req);
    }
    const transferState = inject(TransferState);
    const storeKey = makeCacheKey(req);
    const response = transferState.get(storeKey, null);
    if (response) {
        // Request found in cache. Respond using it.
        let body = response.body;
        switch (response.responseType) {
            case 'arraybuffer':
                body = new TextEncoder().encode(response.body).buffer;
                break;
            case 'blob':
                body = new Blob([response.body]);
                break;
        }
        return of(new HttpResponse({
            body,
            headers: new HttpHeaders(response.headers),
            status: response.status,
            statusText: response.statusText,
            url: response.url,
        }));
    }
    // Request not found in cache. Make the request and cache it.
    return next(req).pipe(tap((event) => {
        if (event instanceof HttpResponse) {
            transferState.set(storeKey, {
                body: event.body,
                headers: getHeadersMap(event.headers),
                status: event.status,
                statusText: event.statusText,
                url: event.url || '',
                responseType: req.responseType,
            });
        }
    }));
}
function getHeadersMap(headers) {
    const headersMap = {};
    for (const key of headers.keys()) {
        const values = headers.getAll(key);
        if (values !== null) {
            headersMap[key] = values;
        }
    }
    return headersMap;
}
function makeCacheKey(request) {
    // make the params encoded same as a url so it's easy to identify
    const { params, method, responseType, url } = request;
    const encodedParams = params.keys().sort().map((k) => `${k}=${params.getAll(k)}`).join('&');
    const key = method + '.' + responseType + '.' + url + '?' + encodedParams;
    const hash = generateHash(key);
    return makeStateKey(hash);
}
/**
 * A method that returns a hash representation of a string using a variant of DJB2 hash
 * algorithm.
 *
 * This is the same hashing logic that is used to generate component ids.
 */
function generateHash(value) {
    let hash = 0;
    for (const char of value) {
        hash = Math.imul(31, hash) + char.charCodeAt(0) << 0;
    }
    // Force positive number hash.
    // 2147483647 = equivalent of Integer.MAX_VALUE.
    hash += 2147483647 + 1;
    return hash.toString();
}
/**
 * Returns the DI providers needed to enable HTTP transfer cache.
 *
 * By default, when using server rendering, requests are performed twice: once on the server and
 * other one on the browser.
 *
 * When these providers are added, requests performed on the server are cached and reused during the
 * bootstrapping of the application in the browser thus avoiding duplicate requests and reducing
 * load time.
 *
 */
function withHttpTransferCache() {
    return [
        {
            provide: CACHE_STATE,
            useFactory: () => {
                inject(ɵENABLED_SSR_FEATURES).add('httpcache');
                return { isCacheActive: true };
            }
        },
        {
            provide: HTTP_ROOT_INTERCEPTOR_FNS,
            useValue: transferCacheInterceptorFn,
            multi: true,
            deps: [TransferState, CACHE_STATE]
        },
        {
            provide: APP_BOOTSTRAP_LISTENER,
            multi: true,
            useFactory: () => {
                const appRef = inject(ApplicationRef);
                const cacheState = inject(CACHE_STATE);
                return () => {
                    appRef.isStable.pipe(first((isStable) => isStable)).toPromise().then(() => {
                        cacheState.isCacheActive = false;
                    });
                };
            }
        }
    ];
}

// This file is not used to build this module. It is only used during editing

/**
 * Generated bundle index. Do not edit.
 */

export { FetchBackend, HTTP_INTERCEPTORS, HttpBackend, HttpClient, HttpClientJsonpModule, HttpClientModule, HttpClientXsrfModule, HttpContext, HttpContextToken, HttpErrorResponse, HttpEventType, HttpFeatureKind, HttpHandler, HttpHeaderResponse, HttpHeaders, HttpParams, HttpRequest, HttpResponse, HttpResponseBase, HttpUrlEncodingCodec, HttpXhrBackend, HttpXsrfTokenExtractor, JsonpClientBackend, JsonpInterceptor, provideHttpClient, withFetch, withInterceptors, withInterceptorsFromDi, withJsonpSupport, withNoXsrfProtection, withRequestsMadeViaParent, withXsrfConfiguration, HttpInterceptorHandler as ɵHttpInterceptingHandler, HttpInterceptorHandler as ɵHttpInterceptorHandler, withHttpTransferCache as ɵwithHttpTransferCache };
//# sourceMappingURL=http.mjs.map
