src/third_party/devtools/front_end/sdk/HARLog.js - cobalt - Git at Google

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 // See http://www.softwareishard.com/blog/har-12-spec/
 // for HAR specification.

 // FIXME: Some fields are not yet supported due to back-end limitations.
 // See https://bugs.webkit.org/show_bug.cgi?id=58127 for details.

 /**
  * @unrestricted
  */
 export default class HARLog {
   /**
    * @param {!SDK.NetworkRequest} request
    * @param {number} monotonicTime
    * @return {!Date}
    */
   static pseudoWallTime(request, monotonicTime) {
     return new Date(request.pseudoWallTime(monotonicTime) * 1000);
   }

   /**
    * @param {!Array.<!SDK.NetworkRequest>} requests
    * @return {!Promise<!Object>}
    */
   static async build(requests) {
     const log = new HARLog();
     const entryPromises = [];
     for (const request of requests) {
       entryPromises.push(Entry.build(request));
     }
     const entries = await Promise.all(entryPromises);
     return {version: '1.2', creator: log._creator(), pages: log._buildPages(requests), entries: entries};
   }

   _creator() {
     const webKitVersion = /AppleWebKit\/([^ ]+)/.exec(window.navigator.userAgent);

     return {name: 'WebInspector', version: webKitVersion ? webKitVersion[1] : 'n/a'};
   }

   /**
    * @param {!Array.<!SDK.NetworkRequest>} requests
    * @return {!Array.<!Object>}
    */
   _buildPages(requests) {
     const seenIdentifiers = {};
     const pages = [];
     for (let i = 0; i < requests.length; ++i) {
       const request = requests[i];
       const page = SDK.NetworkLog.PageLoad.forRequest(request);
       if (!page || seenIdentifiers[page.id]) {
         continue;
       }
       seenIdentifiers[page.id] = true;
       pages.push(this._convertPage(page, request));
     }
     return pages;
   }

   /**
    * @param {!SDK.NetworkLog.PageLoad} page
    * @param {!SDK.NetworkRequest} request
    * @return {!Object}
    */
   _convertPage(page, request) {
     return {
       startedDateTime: HARLog.pseudoWallTime(request, page.startTime).toJSON(),
       id: 'page_' + page.id,
       title: page.url,  // We don't have actual page title here. URL is probably better than nothing.
       pageTimings: {
         onContentLoad: this._pageEventTime(page, page.contentLoadTime),
         onLoad: this._pageEventTime(page, page.loadTime)
       }
     };
   }

   /**
    * @param {!SDK.NetworkLog.PageLoad} page
    * @param {number} time
    * @return {number}
    */
   _pageEventTime(page, time) {
     const startTime = page.startTime;
     if (time === -1 || startTime === -1) {
       return -1;
     }
     return Entry._toMilliseconds(time - startTime);
   }
 }

 /**
  * @unrestricted
  */
 export class Entry {
   /**
    * @param {!SDK.NetworkRequest} request
    */
   constructor(request) {
     this._request = request;
   }

   /**
    * @param {number} time
    * @return {number}
    */
   static _toMilliseconds(time) {
     return time === -1 ? -1 : time * 1000;
   }

   /**
    * @param {!SDK.NetworkRequest} request
    * @return {!Promise<!Object>}
    */
   static async build(request) {
     const harEntry = new Entry(request);
     let ipAddress = harEntry._request.remoteAddress();
     const portPositionInString = ipAddress.lastIndexOf(':');
     if (portPositionInString !== -1) {
       ipAddress = ipAddress.substr(0, portPositionInString);
     }

     const timings = harEntry._buildTimings();
     let time = 0;
     // "ssl" is included in the connect field, so do not double count it.
     for (const t of [timings.blocked, timings.dns, timings.connect, timings.send, timings.wait, timings.receive]) {
       time += Math.max(t, 0);
     }

     const initiator = harEntry._request.initiator();
     const exportedInitiator = {};
     exportedInitiator.type = initiator.type;
     if (initiator.url !== undefined) {
       exportedInitiator.url = initiator.url;
     }
     if (initiator.lineNumber !== undefined) {
       exportedInitiator.lineNumber = initiator.lineNumber;
     }
     if (initiator.stack) {
       exportedInitiator.stack = initiator.stack;
     }

     const entry = {
       startedDateTime: HARLog.pseudoWallTime(harEntry._request, harEntry._request.issueTime()).toJSON(),
       time: time,
       request: await harEntry._buildRequest(),
       response: harEntry._buildResponse(),
       cache: {},  // Not supported yet.
       timings: timings,
       // IPv6 address should not have square brackets per (https://tools.ietf.org/html/rfc2373#section-2.2).
       serverIPAddress: ipAddress.replace(/\[\]/g, ''),
       _initiator: exportedInitiator,
       _priority: harEntry._request.priority(),
       _resourceType: harEntry._request.resourceType().name()
     };

     // Chrome specific.

     if (harEntry._request.cached()) {
       entry._fromCache = harEntry._request.cachedInMemory() ? 'memory' : 'disk';
     }

     if (harEntry._request.connectionId !== '0') {
       entry.connection = harEntry._request.connectionId;
     }

     const page = SDK.NetworkLog.PageLoad.forRequest(harEntry._request);
     if (page) {
       entry.pageref = 'page_' + page.id;
     }

     if (harEntry._request.resourceType() === Common.resourceTypes.WebSocket) {
       const messages = [];
       for (const message of harEntry._request.frames()) {
         messages.push({type: message.type, time: message.time, opcode: message.opCode, data: message.text});
       }
       entry._webSocketMessages = messages;
     }

     return entry;
   }

   /**
    * @return {!Promise<!Object>}
    */
   async _buildRequest() {
     const headersText = this._request.requestHeadersText();
     const res = {
       method: this._request.requestMethod,
       url: this._buildRequestURL(this._request.url()),
       httpVersion: this._request.requestHttpVersion(),
       headers: this._request.requestHeaders(),
       queryString: this._buildParameters(this._request.queryParameters || []),
       cookies: this._buildCookies(this._request.requestCookies || []),
       headersSize: headersText ? headersText.length : -1,
       bodySize: await this._requestBodySize()
     };
     const postData = await this._buildPostData();
     if (postData) {
       res.postData = postData;
     }

     return res;
   }

   /**
    * @return {!Object}
    */
   _buildResponse() {
     const headersText = this._request.responseHeadersText;
     return {
       status: this._request.statusCode,
       statusText: this._request.statusText,
       httpVersion: this._request.responseHttpVersion(),
       headers: this._request.responseHeaders,
       cookies: this._buildCookies(this._request.responseCookies || []),
       content: this._buildContent(),
       redirectURL: this._request.responseHeaderValue('Location') || '',
       headersSize: headersText ? headersText.length : -1,
       bodySize: this.responseBodySize,
       _transferSize: this._request.transferSize,
       _error: this._request.localizedFailDescription
     };
   }

   /**
    * @return {!Object}
    */
   _buildContent() {
     const content = {
       size: this._request.resourceSize,
       mimeType: this._request.mimeType || 'x-unknown',
       // text: this._request.content // TODO: pull out into a boolean flag, as content can be huge (and needs to be requested with an async call)
     };
     const compression = this.responseCompression;
     if (typeof compression === 'number') {
       content.compression = compression;
     }
     return content;
   }

   /**
    * @return {!SDK.HARLog.Entry.Timing}
    */
   _buildTimings() {
     // Order of events: request_start = 0, [proxy], [dns], [connect [ssl]], [send], duration
     const timing = this._request.timing;
     const issueTime = this._request.issueTime();
     const startTime = this._request.startTime;

     const result = {blocked: -1, dns: -1, ssl: -1, connect: -1, send: 0, wait: 0, receive: 0, _blocked_queueing: -1};

     const queuedTime = (issueTime < startTime) ? startTime - issueTime : -1;
     result.blocked = Entry._toMilliseconds(queuedTime);
     result._blocked_queueing = Entry._toMilliseconds(queuedTime);

     let highestTime = 0;
     if (timing) {
       // "blocked" here represents both queued + blocked/stalled + proxy (ie: anything before request was started).
       // We pick the better of when the network request start was reported and pref timing.
       const blockedStart = leastNonNegative([timing.dnsStart, timing.connectStart, timing.sendStart]);
       if (blockedStart !== Infinity) {
         result.blocked += blockedStart;
       }

       // Proxy is part of blocked but sometimes (like quic) blocked is -1 but has proxy timings.
       if (timing.proxyEnd !== -1) {
         result._blocked_proxy = timing.proxyEnd - timing.proxyStart;
       }
       if (result._blocked_proxy && result._blocked_proxy > result.blocked) {
         result.blocked = result._blocked_proxy;
       }

       const dnsStart = timing.dnsEnd >= 0 ? blockedStart : 0;
       const dnsEnd = timing.dnsEnd >= 0 ? timing.dnsEnd : -1;
       result.dns = dnsEnd - dnsStart;

       // SSL timing is included in connection timing.
       const sslStart = timing.sslEnd > 0 ? timing.sslStart : 0;
       const sslEnd = timing.sslEnd > 0 ? timing.sslEnd : -1;
       result.ssl = sslEnd - sslStart;

       const connectStart = timing.connectEnd >= 0 ? leastNonNegative([dnsEnd, blockedStart]) : 0;
       const connectEnd = timing.connectEnd >= 0 ? timing.connectEnd : -1;
       result.connect = connectEnd - connectStart;

       // Send should not be -1 for legacy reasons even if it is served from cache.
       const sendStart = timing.sendEnd >= 0 ? Math.max(connectEnd, dnsEnd, blockedStart) : 0;
       const sendEnd = timing.sendEnd >= 0 ? timing.sendEnd : 0;
       result.send = sendEnd - sendStart;
       // Quic sometimes says that sendStart is before connectionEnd (see: crbug.com/740792)
       if (result.send < 0) {
         result.send = 0;
       }
       highestTime = Math.max(sendEnd, connectEnd, sslEnd, dnsEnd, blockedStart, 0);
     } else if (this._request.responseReceivedTime === -1) {
       // Means that we don't have any more details after blocked, so attribute all to blocked.
       result.blocked = this._request.endTime - issueTime;
       return result;
     }

     const requestTime = timing ? timing.requestTime : startTime;
     const waitStart = highestTime;
     const waitEnd = Entry._toMilliseconds(this._request.responseReceivedTime - requestTime);
     result.wait = waitEnd - waitStart;

     const receiveStart = waitEnd;
     const receiveEnd = Entry._toMilliseconds(this._request.endTime - requestTime);
     result.receive = Math.max(receiveEnd - receiveStart, 0);

     return result;

     /**
      * @param {!Array<number>} values
      * @return {number}
      */
     function leastNonNegative(values) {
       return values.reduce((best, value) => (value >= 0 && value < best) ? value : best, Infinity);
     }
   }

   /**
    * @return {!Promise<?Object>}
    */
   async _buildPostData() {
     const postData = await this._request.requestFormData();
     if (!postData) {
       return null;
     }
     const res = {mimeType: this._request.requestContentType() || '', text: postData};
     const formParameters = await this._request.formParameters();
     if (formParameters) {
       res.params = this._buildParameters(formParameters);
     }
     return res;
   }

   /**
    * @param {!Array.<!Object>} parameters
    * @return {!Array.<!Object>}
    */
   _buildParameters(parameters) {
     return parameters.slice();
   }

   /**
    * @param {string} url
    * @return {string}
    */
   _buildRequestURL(url) {
     return url.split('#', 2)[0];
   }

   /**
    * @param {!Array.<!SDK.Cookie>} cookies
    * @return {!Array.<!Object>}
    */
   _buildCookies(cookies) {
     return cookies.map(this._buildCookie.bind(this));
   }

   /**
    * @param {!SDK.Cookie} cookie
    * @return {!Object}
    */
   _buildCookie(cookie) {
     const c = {
       name: cookie.name(),
       value: cookie.value(),
       path: cookie.path(),
       domain: cookie.domain(),
       expires: cookie.expiresDate(HARLog.pseudoWallTime(this._request, this._request.startTime)),
       httpOnly: cookie.httpOnly(),
       secure: cookie.secure()
     };
     if (cookie.sameSite()) {
       c.sameSite = cookie.sameSite();
     }
     return c;
   }

   /**
    * @return {!Promise<number>}
    */
   async _requestBodySize() {
     const postData = await this._request.requestFormData();
     if (!postData) {
       return 0;
     }

     // As per the har spec, returns the length in bytes of the posted data.
     // TODO(jarhar): This will be wrong if the underlying encoding is not UTF-8. NetworkRequest.requestFormData is
     //   assumed to be UTF-8 because the backend decodes post data to a UTF-8 string regardless of the provided
     //   content-type/charset in InspectorNetworkAgent::FormDataToString
     return new TextEncoder('utf-8').encode(postData).length;
   }

   /**
    * @return {number}
    */
   get responseBodySize() {
     if (this._request.cached() || this._request.statusCode === 304) {
       return 0;
     }
     if (!this._request.responseHeadersText) {
       return -1;
     }
     return this._request.transferSize - this._request.responseHeadersText.length;
   }

   /**
    * @return {number|undefined}
    */
   get responseCompression() {
     if (this._request.cached() || this._request.statusCode === 304 || this._request.statusCode === 206) {
       return;
     }
     if (!this._request.responseHeadersText) {
       return;
     }
     return this._request.resourceSize - this.responseBodySize;
   }
 }

 /* Legacy exported object */
 self.SDK = self.SDK || {};

 /* Legacy exported object */
 SDK = SDK || {};

 /** @constructor */
 SDK.HARLog = HARLog;

 /** @constructor */
 SDK.HARLog.Entry = Entry;

 /** @typedef {!{
   blocked: number,
   dns: number,
   ssl: number,
   connect: number,
   send: number,
   wait: number,
   receive: number,
   _blocked_queueing: number,
   _blocked_proxy: (number|undefined)
 }} */
 SDK.HARLog.Entry.Timing;
	/*
	* Copyright (C) 2012 Google Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are
	* met:
	*
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above
	* copyright notice, this list of conditions and the following disclaimer
	* in the documentation and/or other materials provided with the
	* distribution.
	* * Neither the name of Google Inc. nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/
	// See http://www.softwareishard.com/blog/har-12-spec/
	// for HAR specification.

	// FIXME: Some fields are not yet supported due to back-end limitations.
	// See https://bugs.webkit.org/show_bug.cgi?id=58127 for details.

	/**
	* @unrestricted
	*/
	export default class HARLog {
	/**
	* @param {!SDK.NetworkRequest} request
	* @param {number} monotonicTime
	* @return {!Date}
	*/
	static pseudoWallTime(request, monotonicTime) {
	return new Date(request.pseudoWallTime(monotonicTime) * 1000);
	}

	/**
	* @param {!Array.<!SDK.NetworkRequest>} requests
	* @return {!Promise<!Object>}
	*/
	static async build(requests) {
	const log = new HARLog();
	const entryPromises = [];
	for (const request of requests) {
	entryPromises.push(Entry.build(request));
	}
	const entries = await Promise.all(entryPromises);
	return {version: '1.2', creator: log._creator(), pages: log._buildPages(requests), entries: entries};
	}

	_creator() {
	const webKitVersion = /AppleWebKit\/([^ ]+)/.exec(window.navigator.userAgent);

	return {name: 'WebInspector', version: webKitVersion ? webKitVersion[1] : 'n/a'};
	}

	/**
	* @param {!Array.<!SDK.NetworkRequest>} requests
	* @return {!Array.<!Object>}
	*/
	_buildPages(requests) {
	const seenIdentifiers = {};
	const pages = [];
	for (let i = 0; i < requests.length; ++i) {
	const request = requests[i];
	const page = SDK.NetworkLog.PageLoad.forRequest(request);
	if (!page \|\| seenIdentifiers[page.id]) {
	continue;
	}
	seenIdentifiers[page.id] = true;
	pages.push(this._convertPage(page, request));
	}
	return pages;
	}

	/**
	* @param {!SDK.NetworkLog.PageLoad} page
	* @param {!SDK.NetworkRequest} request
	* @return {!Object}
	*/
	_convertPage(page, request) {
	return {
	startedDateTime: HARLog.pseudoWallTime(request, page.startTime).toJSON(),
	id: 'page_' + page.id,
	title: page.url, // We don't have actual page title here. URL is probably better than nothing.
	pageTimings: {
	onContentLoad: this._pageEventTime(page, page.contentLoadTime),
	onLoad: this._pageEventTime(page, page.loadTime)
	}
	};
	}

	/**
	* @param {!SDK.NetworkLog.PageLoad} page
	* @param {number} time
	* @return {number}
	*/
	_pageEventTime(page, time) {
	const startTime = page.startTime;
	if (time === -1 \|\| startTime === -1) {
	return -1;
	}
	return Entry._toMilliseconds(time - startTime);
	}
	}

	/**
	* @unrestricted
	*/
	export class Entry {
	/**
	* @param {!SDK.NetworkRequest} request
	*/
	constructor(request) {
	this._request = request;
	}

	/**
	* @param {number} time
	* @return {number}
	*/
	static _toMilliseconds(time) {
	return time === -1 ? -1 : time * 1000;
	}

	/**
	* @param {!SDK.NetworkRequest} request
	* @return {!Promise<!Object>}
	*/
	static async build(request) {
	const harEntry = new Entry(request);
	let ipAddress = harEntry._request.remoteAddress();
	const portPositionInString = ipAddress.lastIndexOf(':');
	if (portPositionInString !== -1) {
	ipAddress = ipAddress.substr(0, portPositionInString);
	}

	const timings = harEntry._buildTimings();
	let time = 0;
	// "ssl" is included in the connect field, so do not double count it.
	for (const t of [timings.blocked, timings.dns, timings.connect, timings.send, timings.wait, timings.receive]) {
	time += Math.max(t, 0);
	}

	const initiator = harEntry._request.initiator();
	const exportedInitiator = {};
	exportedInitiator.type = initiator.type;
	if (initiator.url !== undefined) {
	exportedInitiator.url = initiator.url;
	}
	if (initiator.lineNumber !== undefined) {
	exportedInitiator.lineNumber = initiator.lineNumber;
	}
	if (initiator.stack) {
	exportedInitiator.stack = initiator.stack;
	}

	const entry = {
	startedDateTime: HARLog.pseudoWallTime(harEntry._request, harEntry._request.issueTime()).toJSON(),
	time: time,
	request: await harEntry._buildRequest(),
	response: harEntry._buildResponse(),
	cache: {}, // Not supported yet.
	timings: timings,
	// IPv6 address should not have square brackets per (https://tools.ietf.org/html/rfc2373#section-2.2).
	serverIPAddress: ipAddress.replace(/\[\]/g, ''),
	_initiator: exportedInitiator,
	_priority: harEntry._request.priority(),
	_resourceType: harEntry._request.resourceType().name()
	};

	// Chrome specific.

	if (harEntry._request.cached()) {
	entry._fromCache = harEntry._request.cachedInMemory() ? 'memory' : 'disk';
	}

	if (harEntry._request.connectionId !== '0') {
	entry.connection = harEntry._request.connectionId;
	}

	const page = SDK.NetworkLog.PageLoad.forRequest(harEntry._request);
	if (page) {
	entry.pageref = 'page_' + page.id;
	}

	if (harEntry._request.resourceType() === Common.resourceTypes.WebSocket) {
	const messages = [];
	for (const message of harEntry._request.frames()) {
	messages.push({type: message.type, time: message.time, opcode: message.opCode, data: message.text});
	}
	entry._webSocketMessages = messages;
	}

	return entry;
	}

	/**
	* @return {!Promise<!Object>}
	*/
	async _buildRequest() {
	const headersText = this._request.requestHeadersText();
	const res = {
	method: this._request.requestMethod,
	url: this._buildRequestURL(this._request.url()),
	httpVersion: this._request.requestHttpVersion(),
	headers: this._request.requestHeaders(),
	queryString: this._buildParameters(this._request.queryParameters \|\| []),
	cookies: this._buildCookies(this._request.requestCookies \|\| []),
	headersSize: headersText ? headersText.length : -1,
	bodySize: await this._requestBodySize()
	};
	const postData = await this._buildPostData();
	if (postData) {
	res.postData = postData;
	}

	return res;
	}

	/**
	* @return {!Object}
	*/
	_buildResponse() {
	const headersText = this._request.responseHeadersText;
	return {
	status: this._request.statusCode,
	statusText: this._request.statusText,
	httpVersion: this._request.responseHttpVersion(),
	headers: this._request.responseHeaders,
	cookies: this._buildCookies(this._request.responseCookies \|\| []),
	content: this._buildContent(),
	redirectURL: this._request.responseHeaderValue('Location') \|\| '',
	headersSize: headersText ? headersText.length : -1,
	bodySize: this.responseBodySize,
	_transferSize: this._request.transferSize,
	_error: this._request.localizedFailDescription
	};
	}

	/**
	* @return {!Object}
	*/
	_buildContent() {
	const content = {
	size: this._request.resourceSize,
	mimeType: this._request.mimeType \|\| 'x-unknown',
	// text: this._request.content // TODO: pull out into a boolean flag, as content can be huge (and needs to be requested with an async call)
	};
	const compression = this.responseCompression;
	if (typeof compression === 'number') {
	content.compression = compression;
	}
	return content;
	}

	/**
	* @return {!SDK.HARLog.Entry.Timing}
	*/
	_buildTimings() {
	// Order of events: request_start = 0, [proxy], [dns], [connect [ssl]], [send], duration
	const timing = this._request.timing;
	const issueTime = this._request.issueTime();
	const startTime = this._request.startTime;

	const result = {blocked: -1, dns: -1, ssl: -1, connect: -1, send: 0, wait: 0, receive: 0, _blocked_queueing: -1};

	const queuedTime = (issueTime < startTime) ? startTime - issueTime : -1;
	result.blocked = Entry._toMilliseconds(queuedTime);
	result._blocked_queueing = Entry._toMilliseconds(queuedTime);

	let highestTime = 0;
	if (timing) {
	// "blocked" here represents both queued + blocked/stalled + proxy (ie: anything before request was started).
	// We pick the better of when the network request start was reported and pref timing.
	const blockedStart = leastNonNegative([timing.dnsStart, timing.connectStart, timing.sendStart]);
	if (blockedStart !== Infinity) {
	result.blocked += blockedStart;
	}

	// Proxy is part of blocked but sometimes (like quic) blocked is -1 but has proxy timings.
	if (timing.proxyEnd !== -1) {
	result._blocked_proxy = timing.proxyEnd - timing.proxyStart;
	}
	if (result._blocked_proxy && result._blocked_proxy > result.blocked) {
	result.blocked = result._blocked_proxy;
	}

	const dnsStart = timing.dnsEnd >= 0 ? blockedStart : 0;
	const dnsEnd = timing.dnsEnd >= 0 ? timing.dnsEnd : -1;
	result.dns = dnsEnd - dnsStart;

	// SSL timing is included in connection timing.
	const sslStart = timing.sslEnd > 0 ? timing.sslStart : 0;
	const sslEnd = timing.sslEnd > 0 ? timing.sslEnd : -1;
	result.ssl = sslEnd - sslStart;

	const connectStart = timing.connectEnd >= 0 ? leastNonNegative([dnsEnd, blockedStart]) : 0;
	const connectEnd = timing.connectEnd >= 0 ? timing.connectEnd : -1;
	result.connect = connectEnd - connectStart;

	// Send should not be -1 for legacy reasons even if it is served from cache.
	const sendStart = timing.sendEnd >= 0 ? Math.max(connectEnd, dnsEnd, blockedStart) : 0;
	const sendEnd = timing.sendEnd >= 0 ? timing.sendEnd : 0;
	result.send = sendEnd - sendStart;
	// Quic sometimes says that sendStart is before connectionEnd (see: crbug.com/740792)
	if (result.send < 0) {
	result.send = 0;
	}
	highestTime = Math.max(sendEnd, connectEnd, sslEnd, dnsEnd, blockedStart, 0);
	} else if (this._request.responseReceivedTime === -1) {
	// Means that we don't have any more details after blocked, so attribute all to blocked.
	result.blocked = this._request.endTime - issueTime;
	return result;
	}

	const requestTime = timing ? timing.requestTime : startTime;
	const waitStart = highestTime;
	const waitEnd = Entry._toMilliseconds(this._request.responseReceivedTime - requestTime);
	result.wait = waitEnd - waitStart;

	const receiveStart = waitEnd;
	const receiveEnd = Entry._toMilliseconds(this._request.endTime - requestTime);
	result.receive = Math.max(receiveEnd - receiveStart, 0);

	return result;

	/**
	* @param {!Array<number>} values
	* @return {number}
	*/
	function leastNonNegative(values) {
	return values.reduce((best, value) => (value >= 0 && value < best) ? value : best, Infinity);
	}
	}

	/**
	* @return {!Promise<?Object>}
	*/
	async _buildPostData() {
	const postData = await this._request.requestFormData();
	if (!postData) {
	return null;
	}
	const res = {mimeType: this._request.requestContentType() \|\| '', text: postData};
	const formParameters = await this._request.formParameters();
	if (formParameters) {
	res.params = this._buildParameters(formParameters);
	}
	return res;
	}

	/**
	* @param {!Array.<!Object>} parameters
	* @return {!Array.<!Object>}
	*/
	_buildParameters(parameters) {
	return parameters.slice();
	}

	/**
	* @param {string} url
	* @return {string}
	*/
	_buildRequestURL(url) {
	return url.split('#', 2)[0];
	}

	/**
	* @param {!Array.<!SDK.Cookie>} cookies
	* @return {!Array.<!Object>}
	*/
	_buildCookies(cookies) {
	return cookies.map(this._buildCookie.bind(this));
	}

	/**
	* @param {!SDK.Cookie} cookie
	* @return {!Object}
	*/
	_buildCookie(cookie) {
	const c = {
	name: cookie.name(),
	value: cookie.value(),
	path: cookie.path(),
	domain: cookie.domain(),
	expires: cookie.expiresDate(HARLog.pseudoWallTime(this._request, this._request.startTime)),
	httpOnly: cookie.httpOnly(),
	secure: cookie.secure()
	};
	if (cookie.sameSite()) {
	c.sameSite = cookie.sameSite();
	}
	return c;
	}

	/**
	* @return {!Promise<number>}
	*/
	async _requestBodySize() {
	const postData = await this._request.requestFormData();
	if (!postData) {
	return 0;
	}

	// As per the har spec, returns the length in bytes of the posted data.
	// TODO(jarhar): This will be wrong if the underlying encoding is not UTF-8. NetworkRequest.requestFormData is
	// assumed to be UTF-8 because the backend decodes post data to a UTF-8 string regardless of the provided
	// content-type/charset in InspectorNetworkAgent::FormDataToString
	return new TextEncoder('utf-8').encode(postData).length;
	}

	/**
	* @return {number}
	*/
	get responseBodySize() {
	if (this._request.cached() \|\| this._request.statusCode === 304) {
	return 0;
	}
	if (!this._request.responseHeadersText) {
	return -1;
	}
	return this._request.transferSize - this._request.responseHeadersText.length;
	}

	/**
	* @return {number\|undefined}
	*/
	get responseCompression() {
	if (this._request.cached() \|\| this._request.statusCode === 304 \|\| this._request.statusCode === 206) {
	return;
	}
	if (!this._request.responseHeadersText) {
	return;
	}
	return this._request.resourceSize - this.responseBodySize;
	}
	}

	/* Legacy exported object */
	self.SDK = self.SDK \|\| {};

	/* Legacy exported object */
	SDK = SDK \|\| {};

	/** @constructor */
	SDK.HARLog = HARLog;

	/** @constructor */
	SDK.HARLog.Entry = Entry;

	/** @typedef {!{
	blocked: number,
	dns: number,
	ssl: number,
	connect: number,
	send: number,
	wait: number,
	receive: number,
	_blocked_queueing: number,
	_blocked_proxy: (number\|undefined)
	}} */
	SDK.HARLog.Entry.Timing;