/
NetworkManager.ts
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/
NetworkManager.ts
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/**
* Copyright 2017 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { EventEmitter } from './EventEmitter';
import { assert } from './assert';
import { helper, debugError } from './helper';
import Protocol from '../protocol';
import { Events } from './Events';
import { CDPSession } from './Connection';
import { FrameManager } from './FrameManager';
import { HTTPRequest } from './HTTPRequest';
import { HTTPResponse } from './HTTPResponse';
export interface Credentials {
username: string;
password: string;
}
export class NetworkManager extends EventEmitter {
_client: CDPSession;
_ignoreHTTPSErrors: boolean;
_frameManager: FrameManager;
_requestIdToRequest = new Map<string, HTTPRequest>();
_requestIdToRequestWillBeSentEvent = new Map<
string,
Protocol.Network.requestWillBeSentPayload
>();
_extraHTTPHeaders: Record<string, string> = {};
_offline = false;
_credentials?: Credentials = null;
_attemptedAuthentications = new Set<string>();
_userRequestInterceptionEnabled = false;
_protocolRequestInterceptionEnabled = false;
_userCacheDisabled = false;
_requestIdToInterceptionId = new Map<string, string>();
constructor(
client: CDPSession,
ignoreHTTPSErrors: boolean,
frameManager: FrameManager
) {
super();
this._client = client;
this._ignoreHTTPSErrors = ignoreHTTPSErrors;
this._frameManager = frameManager;
this._client.on('Fetch.requestPaused', this._onRequestPaused.bind(this));
this._client.on('Fetch.authRequired', this._onAuthRequired.bind(this));
this._client.on(
'Network.requestWillBeSent',
this._onRequestWillBeSent.bind(this)
);
this._client.on(
'Network.requestServedFromCache',
this._onRequestServedFromCache.bind(this)
);
this._client.on(
'Network.responseReceived',
this._onResponseReceived.bind(this)
);
this._client.on(
'Network.loadingFinished',
this._onLoadingFinished.bind(this)
);
this._client.on('Network.loadingFailed', this._onLoadingFailed.bind(this));
}
async initialize(): Promise<void> {
await this._client.send('Network.enable');
if (this._ignoreHTTPSErrors)
await this._client.send('Security.setIgnoreCertificateErrors', {
ignore: true,
});
}
async authenticate(credentials?: Credentials): Promise<void> {
this._credentials = credentials;
await this._updateProtocolRequestInterception();
}
async setExtraHTTPHeaders(
extraHTTPHeaders: Record<string, string>
): Promise<void> {
this._extraHTTPHeaders = {};
for (const key of Object.keys(extraHTTPHeaders)) {
const value = extraHTTPHeaders[key];
assert(
helper.isString(value),
`Expected value of header "${key}" to be String, but "${typeof value}" is found.`
);
this._extraHTTPHeaders[key.toLowerCase()] = value;
}
await this._client.send('Network.setExtraHTTPHeaders', {
headers: this._extraHTTPHeaders,
});
}
extraHTTPHeaders(): Record<string, string> {
return Object.assign({}, this._extraHTTPHeaders);
}
async setOfflineMode(value: boolean): Promise<void> {
if (this._offline === value) return;
this._offline = value;
await this._client.send('Network.emulateNetworkConditions', {
offline: this._offline,
// values of 0 remove any active throttling. crbug.com/456324#c9
latency: 0,
downloadThroughput: -1,
uploadThroughput: -1,
});
}
async setUserAgent(userAgent: string): Promise<void> {
await this._client.send('Network.setUserAgentOverride', { userAgent });
}
async setCacheEnabled(enabled: boolean): Promise<void> {
this._userCacheDisabled = !enabled;
await this._updateProtocolCacheDisabled();
}
async setRequestInterception(value: boolean): Promise<void> {
this._userRequestInterceptionEnabled = value;
await this._updateProtocolRequestInterception();
}
async _updateProtocolRequestInterception(): Promise<void> {
const enabled = this._userRequestInterceptionEnabled || !!this._credentials;
if (enabled === this._protocolRequestInterceptionEnabled) return;
this._protocolRequestInterceptionEnabled = enabled;
if (enabled) {
await Promise.all([
this._updateProtocolCacheDisabled(),
this._client.send('Fetch.enable', {
handleAuthRequests: true,
patterns: [{ urlPattern: '*' }],
}),
]);
} else {
await Promise.all([
this._updateProtocolCacheDisabled(),
this._client.send('Fetch.disable'),
]);
}
}
async _updateProtocolCacheDisabled(): Promise<void> {
await this._client.send('Network.setCacheDisabled', {
cacheDisabled:
this._userCacheDisabled || this._protocolRequestInterceptionEnabled,
});
}
_onRequestWillBeSent(event: Protocol.Network.requestWillBeSentPayload): void {
// Request interception doesn't happen for data URLs with Network Service.
if (
this._protocolRequestInterceptionEnabled &&
!event.request.url.startsWith('data:')
) {
const requestId = event.requestId;
const interceptionId = this._requestIdToInterceptionId.get(requestId);
if (interceptionId) {
this._onRequest(event, interceptionId);
this._requestIdToInterceptionId.delete(requestId);
} else {
this._requestIdToRequestWillBeSentEvent.set(event.requestId, event);
}
return;
}
this._onRequest(event, null);
}
/**
* @param {!Protocol.Fetch.authRequiredPayload} event
*/
_onAuthRequired(event: Protocol.Fetch.authRequiredPayload): void {
/* TODO(jacktfranklin): This is defined in protocol.d.ts but not
* in an easily referrable way - we should look at exposing it.
*/
type AuthResponse = 'Default' | 'CancelAuth' | 'ProvideCredentials';
let response: AuthResponse = 'Default';
if (this._attemptedAuthentications.has(event.requestId)) {
response = 'CancelAuth';
} else if (this._credentials) {
response = 'ProvideCredentials';
this._attemptedAuthentications.add(event.requestId);
}
const { username, password } = this._credentials || {
username: undefined,
password: undefined,
};
this._client
.send('Fetch.continueWithAuth', {
requestId: event.requestId,
authChallengeResponse: { response, username, password },
})
.catch(debugError);
}
_onRequestPaused(event: Protocol.Fetch.requestPausedPayload): void {
if (
!this._userRequestInterceptionEnabled &&
this._protocolRequestInterceptionEnabled
) {
this._client
.send('Fetch.continueRequest', {
requestId: event.requestId,
})
.catch(debugError);
}
const requestId = event.networkId;
const interceptionId = event.requestId;
if (requestId && this._requestIdToRequestWillBeSentEvent.has(requestId)) {
const requestWillBeSentEvent = this._requestIdToRequestWillBeSentEvent.get(
requestId
);
this._onRequest(requestWillBeSentEvent, interceptionId);
this._requestIdToRequestWillBeSentEvent.delete(requestId);
} else {
this._requestIdToInterceptionId.set(requestId, interceptionId);
}
}
_onRequest(
event: Protocol.Network.requestWillBeSentPayload,
interceptionId?: string
): void {
let redirectChain = [];
if (event.redirectResponse) {
const request = this._requestIdToRequest.get(event.requestId);
// If we connect late to the target, we could have missed the requestWillBeSent event.
if (request) {
this._handleRequestRedirect(request, event.redirectResponse);
redirectChain = request._redirectChain;
}
}
const frame = event.frameId
? this._frameManager.frame(event.frameId)
: null;
const request = new HTTPRequest(
this._client,
frame,
interceptionId,
this._userRequestInterceptionEnabled,
event,
redirectChain
);
this._requestIdToRequest.set(event.requestId, request);
this.emit(Events.NetworkManager.Request, request);
}
_onRequestServedFromCache(
event: Protocol.Network.requestServedFromCachePayload
): void {
const request = this._requestIdToRequest.get(event.requestId);
if (request) request._fromMemoryCache = true;
}
_handleRequestRedirect(
request: HTTPRequest,
responsePayload: Protocol.Network.Response
): void {
const response = new HTTPResponse(this._client, request, responsePayload);
request._response = response;
request._redirectChain.push(request);
response._resolveBody(
new Error('Response body is unavailable for redirect responses')
);
this._requestIdToRequest.delete(request._requestId);
this._attemptedAuthentications.delete(request._interceptionId);
this.emit(Events.NetworkManager.Response, response);
this.emit(Events.NetworkManager.RequestFinished, request);
}
_onResponseReceived(event: Protocol.Network.responseReceivedPayload): void {
const request = this._requestIdToRequest.get(event.requestId);
// FileUpload sends a response without a matching request.
if (!request) return;
const response = new HTTPResponse(this._client, request, event.response);
request._response = response;
this.emit(Events.NetworkManager.Response, response);
}
_onLoadingFinished(event: Protocol.Network.loadingFinishedPayload): void {
const request = this._requestIdToRequest.get(event.requestId);
// For certain requestIds we never receive requestWillBeSent event.
// @see https://crbug.com/750469
if (!request) return;
// Under certain conditions we never get the Network.responseReceived
// event from protocol. @see https://crbug.com/883475
if (request.response()) request.response()._resolveBody(null);
this._requestIdToRequest.delete(request._requestId);
this._attemptedAuthentications.delete(request._interceptionId);
this.emit(Events.NetworkManager.RequestFinished, request);
}
_onLoadingFailed(event: Protocol.Network.loadingFailedPayload): void {
const request = this._requestIdToRequest.get(event.requestId);
// For certain requestIds we never receive requestWillBeSent event.
// @see https://crbug.com/750469
if (!request) return;
request._failureText = event.errorText;
const response = request.response();
if (response) response._resolveBody(null);
this._requestIdToRequest.delete(request._requestId);
this._attemptedAuthentications.delete(request._interceptionId);
this.emit(Events.NetworkManager.RequestFailed, request);
}
}