diff options
Diffstat (limited to 'remote/shared/listeners/NetworkEventRecord.sys.mjs')
| -rw-r--r-- | remote/shared/listeners/NetworkEventRecord.sys.mjs | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/remote/shared/listeners/NetworkEventRecord.sys.mjs b/remote/shared/listeners/NetworkEventRecord.sys.mjs new file mode 100644 index 0000000000..cc3e0d1001 --- /dev/null +++ b/remote/shared/listeners/NetworkEventRecord.sys.mjs @@ -0,0 +1,370 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +const lazy = {}; +ChromeUtils.defineESModuleGetters(lazy, { + NetworkUtils: + "resource://devtools/shared/network-observer/NetworkUtils.sys.mjs", + + TabManager: "chrome://remote/content/shared/TabManager.sys.mjs", +}); + +/** + * The NetworkEventRecord implements the interface expected from network event + * owners for consumers of the DevTools NetworkObserver. + * + * The NetworkEventRecord emits the before-request-sent event on behalf of the + * NetworkListener instance which created it. + */ +export class NetworkEventRecord { + #channel; + #fromCache; + #networkListener; + #redirectCount; + #requestData; + #requestId; + #responseData; + #wrappedChannel; + + /** + * + * @param {object} networkEvent + * The initial network event information (see createNetworkEvent() in + * NetworkUtils.sys.mjs). + * @param {nsIChannel} channel + * The nsIChannel behind this network event. + * @param {NetworkListener} networkListener + * The NetworkListener which created this NetworkEventRecord. + */ + constructor(networkEvent, channel, networkListener) { + this.#channel = channel; + this.#fromCache = networkEvent.fromCache; + + this.#wrappedChannel = ChannelWrapper.get(channel); + + this.#networkListener = networkListener; + + // The wrappedChannel id remains identical across redirects, whereas + // nsIChannel.channelId is different for each and every request. + this.#requestId = this.#wrappedChannel.id.toString(); + + const { cookies, headers } = + lazy.NetworkUtils.fetchRequestHeadersAndCookies(channel); + + // See the RequestData type definition for the full list of properties that + // should be set on this object. + this.#requestData = { + bodySize: null, + cookies, + headers, + headersSize: networkEvent.rawHeaders ? networkEvent.rawHeaders.length : 0, + method: channel.requestMethod, + request: this.#requestId, + timings: {}, + url: channel.URI.spec, + }; + + // See the ResponseData type definition for the full list of properties that + // should be set on this object. + this.#responseData = { + // encoded size (body) + bodySize: null, + content: { + // decoded size + size: null, + }, + // encoded size (headers) + headersSize: null, + url: channel.URI.spec, + }; + + // NetworkObserver creates a network event when request headers have been + // parsed. + // According to the BiDi spec, we should emit beforeRequestSent when adding + // request headers, see https://whatpr.org/fetch/1540.html#http-network-or-cache-fetch + // step 8.17 + // Bug 1802181: switch the NetworkObserver to an event-based API. + this.#emitBeforeRequestSent(); + } + + /** + * Add network request POST data. + * + * Required API for a NetworkObserver event owner. + * + * @param {object} postData + * The request POST data. + */ + addRequestPostData(postData) { + // Only the postData size is needed for RemoteAgent consumers. + this.#requestData.bodySize = postData.size; + } + + /** + * Add the initial network response information. + * + * Required API for a NetworkObserver event owner. + * + * + * @param {object} options + * @param {nsIChannel} options.channel + * The channel. + * @param {boolean} options.fromCache + * @param {string} options.rawHeaders + */ + addResponseStart(options) { + const { channel, fromCache, rawHeaders = "" } = options; + const { headers } = + lazy.NetworkUtils.fetchResponseHeadersAndCookies(channel); + + const headersSize = rawHeaders.length; + this.#responseData = { + ...this.#responseData, + bodySize: 0, + bytesReceived: headersSize, + fromCache: this.#fromCache || !!fromCache, + headers, + headersSize, + mimeType: this.#getMimeType(), + protocol: lazy.NetworkUtils.getProtocol(channel), + status: channel.responseStatus, + statusText: channel.responseStatusText, + }; + + // This should be triggered when all headers have been received, matching + // the WebDriverBiDi response started trigger in `4.6. HTTP-network fetch` + // from the fetch specification, based on the PR visible at + // https://github.com/whatwg/fetch/pull/1540 + this.#emitResponseStarted(); + } + + /** + * Add connection security information. + * + * Required API for a NetworkObserver event owner. + * + * Not used for RemoteAgent. + * + * @param {object} info + * The object containing security information. + * @param {boolean} isRacing + * True if the corresponding channel raced the cache and network requests. + */ + addSecurityInfo(info, isRacing) {} + + /** + * Add network event timings. + * + * Required API for a NetworkObserver event owner. + * + * Not used for RemoteAgent. + * + * @param {number} total + * The total time for the request. + * @param {object} timings + * The har-like timings. + * @param {object} offsets + * The har-like timings, but as offset from the request start. + * @param {Array} serverTimings + * The server timings. + */ + addEventTimings(total, timings, offsets, serverTimings) {} + + /** + * Add response cache entry. + * + * Required API for a NetworkObserver event owner. + * + * Not used for RemoteAgent. + * + * @param {object} options + * An object which contains a single responseCache property. + */ + addResponseCache(options) {} + + /** + * Add response content. + * + * Required API for a NetworkObserver event owner. + * + * @param {object} response + * An object which represents the response content. + * @param {object} responseInfo + * Additional meta data about the response. + */ + addResponseContent(response, responseInfo) { + // Update content-related sizes with the latest data from addResponseContent. + this.#responseData = { + ...this.#responseData, + bodySize: response.bodySize, + bytesReceived: response.transferredSize, + content: { + size: response.decodedBodySize, + }, + }; + + this.#emitResponseCompleted(); + } + + /** + * Add server timings. + * + * Required API for a NetworkObserver event owner. + * + * Not used for RemoteAgent. + * + * @param {Array} serverTimings + * The server timings. + */ + addServerTimings(serverTimings) {} + + #emitBeforeRequestSent() { + this.#updateDataFromTimedChannel(); + + this.#networkListener.emit("before-request-sent", { + contextId: this.#getContextId(), + redirectCount: this.#redirectCount, + requestData: this.#requestData, + timestamp: Date.now(), + }); + } + + #emitResponseCompleted() { + this.#updateDataFromTimedChannel(); + + this.#networkListener.emit("response-completed", { + contextId: this.#getContextId(), + redirectCount: this.#redirectCount, + requestData: this.#requestData, + responseData: this.#responseData, + timestamp: Date.now(), + }); + } + + #emitResponseStarted() { + this.#updateDataFromTimedChannel(); + + this.#networkListener.emit("response-started", { + contextId: this.#getContextId(), + redirectCount: this.#redirectCount, + requestData: this.#requestData, + responseData: this.#responseData, + timestamp: Date.now(), + }); + } + + /** + * Convert the provided request timing to a timing relative to the beginning + * of the request. All timings are numbers representing high definition + * timestamps. + * + * @param {number} timing + * High definition timestamp for a request timing relative from the time + * origin. + * @param {number} requestTime + * High definition timestamp for the request start time relative from the + * time origin. + * @returns {number} + * High definition timestamp for the request timing relative to the start + * time of the request, or 0 if the provided timing was 0. + */ + #convertTimestamp(timing, requestTime) { + if (timing == 0) { + return 0; + } + + return timing - requestTime; + } + + /** + * Retrieve the context id corresponding to the current channel, this could + * change dynamically during a cross group navigation for an iframe, so this + * should always be retrieved dynamically. + */ + #getContextId() { + const id = lazy.NetworkUtils.getChannelBrowsingContextID(this.#channel); + const browsingContext = BrowsingContext.get(id); + return lazy.TabManager.getIdForBrowsingContext(browsingContext); + } + + #getMimeType() { + // TODO: DevTools NetworkObserver is computing a similar value in + // addResponseContent, but uses an inconsistent implementation in + // addResponseStart. This approach can only be used as early as in + // addResponseHeaders. We should move this logic to the NetworkObserver and + // expose mimeType in addResponseStart. Bug 1809670. + let mimeType = ""; + + try { + mimeType = this.#wrappedChannel.contentType; + const contentCharset = this.#channel.contentCharset; + if (contentCharset) { + mimeType += `;charset=${contentCharset}`; + } + } catch (e) { + // Ignore exceptions when reading contentType/contentCharset + } + + return mimeType; + } + + #getTimingsFromTimedChannel(timedChannel) { + const { + channelCreationTime, + redirectStartTime, + redirectEndTime, + dispatchFetchEventStartTime, + cacheReadStartTime, + domainLookupStartTime, + domainLookupEndTime, + connectStartTime, + connectEndTime, + secureConnectionStartTime, + requestStartTime, + responseStartTime, + responseEndTime, + } = timedChannel; + + // fetchStart should be the post-redirect start time, which should be the + // first non-zero timing from: dispatchFetchEventStart, cacheReadStart and + // domainLookupStart. See https://www.w3.org/TR/navigation-timing-2/#processing-model + const fetchStartTime = + dispatchFetchEventStartTime || + cacheReadStartTime || + domainLookupStartTime; + + // Bug 1805478: Per spec, the origin time should match Performance API's + // originTime for the global which initiated the request. This is not + // available in the parent process, so for now we will use 0. + const originTime = 0; + + return { + originTime, + requestTime: this.#convertTimestamp(channelCreationTime, originTime), + redirectStart: this.#convertTimestamp(redirectStartTime, originTime), + redirectEnd: this.#convertTimestamp(redirectEndTime, originTime), + fetchStart: this.#convertTimestamp(fetchStartTime, originTime), + dnsStart: this.#convertTimestamp(domainLookupStartTime, originTime), + dnsEnd: this.#convertTimestamp(domainLookupEndTime, originTime), + connectStart: this.#convertTimestamp(connectStartTime, originTime), + connectEnd: this.#convertTimestamp(connectEndTime, originTime), + tlsStart: this.#convertTimestamp(secureConnectionStartTime, originTime), + tlsEnd: this.#convertTimestamp(connectEndTime, originTime), + requestStart: this.#convertTimestamp(requestStartTime, originTime), + responseStart: this.#convertTimestamp(responseStartTime, originTime), + responseEnd: this.#convertTimestamp(responseEndTime, originTime), + }; + } + + /** + * Update the timings and the redirect count from the nsITimedChannel + * corresponding to the current channel. This should be called before emitting + * any event from this class. + */ + #updateDataFromTimedChannel() { + const timedChannel = this.#channel.QueryInterface(Ci.nsITimedChannel); + this.#redirectCount = timedChannel.redirectCount; + this.#requestData.timings = this.#getTimingsFromTimedChannel(timedChannel); + } +} |