14 files changed, 1941 insertions, 0 deletions
diff --git a/devtools/client/netmonitor/har/har-automation.js b/devtools/client/netmonitor/har/har-automation.js
new file mode 100644
index 000000000..0885c4f96
--- /dev/null
+++ b/devtools/client/netmonitor/har/har-automation.js
@@ -0,0 +1,273 @@
+/* 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/. */
+"use strict";
+/* eslint-disable mozilla/reject-some-requires */
+const { Ci } = require("chrome");
+const { Class } = require("sdk/core/heritage");
+const { resolve } = require("promise");
+const Services = require("Services");
+
+loader.lazyRequireGetter(this, "HarCollector", "devtools/client/netmonitor/har/har-collector", true);
+loader.lazyRequireGetter(this, "HarExporter", "devtools/client/netmonitor/har/har-exporter", true);
+loader.lazyRequireGetter(this, "HarUtils", "devtools/client/netmonitor/har/har-utils", true);
+
+const prefDomain = "devtools.netmonitor.har.";
+
+// Helper tracer. Should be generic sharable by other modules (bug 1171927)
+const trace = {
+  log: function (...args) {
+  }
+};
+
+/**
+ * This object is responsible for automated HAR export. It listens
+ * for Network activity, collects all HTTP data and triggers HAR
+ * export when the page is loaded.
+ *
+ * The user needs to enable the following preference to make the
+ * auto-export work: devtools.netmonitor.har.enableAutoExportToFile
+ *
+ * HAR files are stored within directory that is specified in this
+ * preference: devtools.netmonitor.har.defaultLogDir
+ *
+ * If the default log directory preference isn't set the following
+ * directory is used by default: <profile>/har/logs
+ */
+var HarAutomation = Class({
+  // Initialization
+
+  initialize: function (toolbox) {
+    this.toolbox = toolbox;
+
+    let target = toolbox.target;
+    target.makeRemote().then(() => {
+      this.startMonitoring(target.client, target.form);
+    });
+  },
+
+  destroy: function () {
+    if (this.collector) {
+      this.collector.stop();
+    }
+
+    if (this.tabWatcher) {
+      this.tabWatcher.disconnect();
+    }
+  },
+
+  // Automation
+
+  startMonitoring: function (client, tabGrip, callback) {
+    if (!client) {
+      return;
+    }
+
+    if (!tabGrip) {
+      return;
+    }
+
+    this.debuggerClient = client;
+    this.tabClient = this.toolbox.target.activeTab;
+    this.webConsoleClient = this.toolbox.target.activeConsole;
+
+    this.tabWatcher = new TabWatcher(this.toolbox, this);
+    this.tabWatcher.connect();
+  },
+
+  pageLoadBegin: function (response) {
+    this.resetCollector();
+  },
+
+  resetCollector: function () {
+    if (this.collector) {
+      this.collector.stop();
+    }
+
+    // A page is about to be loaded, start collecting HTTP
+    // data from events sent from the backend.
+    this.collector = new HarCollector({
+      webConsoleClient: this.webConsoleClient,
+      debuggerClient: this.debuggerClient
+    });
+
+    this.collector.start();
+  },
+
+  /**
+   * A page is done loading, export collected data. Note that
+   * some requests for additional page resources might be pending,
+   * so export all after all has been properly received from the backend.
+   *
+   * This collector still works and collects any consequent HTTP
+   * traffic (e.g. XHRs) happening after the page is loaded and
+   * The additional traffic can be exported by executing
+   * triggerExport on this object.
+   */
+  pageLoadDone: function (response) {
+    trace.log("HarAutomation.pageLoadDone; ", response);
+
+    if (this.collector) {
+      this.collector.waitForHarLoad().then(collector => {
+        return this.autoExport();
+      });
+    }
+  },
+
+  autoExport: function () {
+    let autoExport = Services.prefs.getBoolPref(prefDomain +
+      "enableAutoExportToFile");
+
+    if (!autoExport) {
+      return resolve();
+    }
+
+    // Auto export to file is enabled, so save collected data
+    // into a file and use all the default options.
+    let data = {
+      fileName: Services.prefs.getCharPref(prefDomain + "defaultFileName"),
+    };
+
+    return this.executeExport(data);
+  },
+
+  // Public API
+
+  /**
+   * Export all what is currently collected.
+   */
+  triggerExport: function (data) {
+    if (!data.fileName) {
+      data.fileName = Services.prefs.getCharPref(prefDomain +
+        "defaultFileName");
+    }
+
+    return this.executeExport(data);
+  },
+
+  /**
+   * Clear currently collected data.
+   */
+  clear: function () {
+    this.resetCollector();
+  },
+
+  // HAR Export
+
+  /**
+   * Execute HAR export. This method fetches all data from the
+   * Network panel (asynchronously) and saves it into a file.
+   */
+  executeExport: function (data) {
+    let items = this.collector.getItems();
+    let form = this.toolbox.target.form;
+    let title = form.title || form.url;
+
+    let options = {
+      getString: this.getString.bind(this),
+      view: this,
+      items: items,
+    };
+
+    options.defaultFileName = data.fileName;
+    options.compress = data.compress;
+    options.title = data.title || title;
+    options.id = data.id;
+    options.jsonp = data.jsonp;
+    options.includeResponseBodies = data.includeResponseBodies;
+    options.jsonpCallback = data.jsonpCallback;
+    options.forceExport = data.forceExport;
+
+    trace.log("HarAutomation.executeExport; " + data.fileName, options);
+
+    return HarExporter.fetchHarData(options).then(jsonString => {
+      // Save the HAR file if the file name is provided.
+      if (jsonString && options.defaultFileName) {
+        let file = getDefaultTargetFile(options);
+        if (file) {
+          HarUtils.saveToFile(file, jsonString, options.compress);
+        }
+      }
+
+      return jsonString;
+    });
+  },
+
+  /**
+   * Fetches the full text of a string.
+   */
+  getString: function (stringGrip) {
+    return this.webConsoleClient.getString(stringGrip);
+  },
+});
+
+// Helpers
+
+function TabWatcher(toolbox, listener) {
+  this.target = toolbox.target;
+  this.listener = listener;
+
+  this.onTabNavigated = this.onTabNavigated.bind(this);
+}
+
+TabWatcher.prototype = {
+  // Connection
+
+  connect: function () {
+    this.target.on("navigate", this.onTabNavigated);
+    this.target.on("will-navigate", this.onTabNavigated);
+  },
+
+  disconnect: function () {
+    if (!this.target) {
+      return;
+    }
+
+    this.target.off("navigate", this.onTabNavigated);
+    this.target.off("will-navigate", this.onTabNavigated);
+  },
+
+  // Event Handlers
+
+  /**
+   * Called for each location change in the monitored tab.
+   *
+   * @param string aType
+   *        Packet type.
+   * @param object aPacket
+   *        Packet received from the server.
+   */
+  onTabNavigated: function (type, packet) {
+    switch (type) {
+      case "will-navigate": {
+        this.listener.pageLoadBegin(packet);
+        break;
+      }
+      case "navigate": {
+        this.listener.pageLoadDone(packet);
+        break;
+      }
+    }
+  },
+};
+
+// Protocol Helpers
+
+/**
+ * Returns target file for exported HAR data.
+ */
+function getDefaultTargetFile(options) {
+  let path = options.defaultLogDir ||
+    Services.prefs.getCharPref("devtools.netmonitor.har.defaultLogDir");
+  let folder = HarUtils.getLocalDirectory(path);
+  let fileName = HarUtils.getHarFileName(options.defaultFileName,
+    options.jsonp, options.compress);
+
+  folder.append(fileName);
+  folder.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, parseInt("0666", 8));
+
+  return folder;
+}
+
+// Exports from this module
+exports.HarAutomation = HarAutomation;
diff --git a/devtools/client/netmonitor/har/har-builder.js b/devtools/client/netmonitor/har/har-builder.js
new file mode 100644
index 000000000..f28e43016
--- /dev/null
+++ b/devtools/client/netmonitor/har/har-builder.js
@@ -0,0 +1,491 @@
+/* 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/. */
+"use strict";
+
+const { defer, all } = require("promise");
+const { LocalizationHelper } = require("devtools/shared/l10n");
+const Services = require("Services");
+const appInfo = Services.appinfo;
+const { CurlUtils } = require("devtools/client/shared/curl");
+const { getFormDataSections } = require("devtools/client/netmonitor/request-utils");
+
+loader.lazyRequireGetter(this, "NetworkHelper", "devtools/shared/webconsole/network-helper");
+
+loader.lazyGetter(this, "L10N", () => {
+  return new LocalizationHelper("devtools/client/locales/har.properties");
+});
+
+const HAR_VERSION = "1.1";
+
+/**
+ * This object is responsible for building HAR file. See HAR spec:
+ * https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/HAR/Overview.html
+ * http://www.softwareishard.com/blog/har-12-spec/
+ *
+ * @param {Object} options configuration object
+ *
+ * The following options are supported:
+ *
+ * - items {Array}: List of Network requests to be exported. It is possible
+ *   to use directly: NetMonitorView.RequestsMenu.items
+ *
+ * - id {String}: ID of the exported page.
+ *
+ * - title {String}: Title of the exported page.
+ *
+ * - includeResponseBodies {Boolean}: Set to true to include HTTP response
+ *   bodies in the result data structure.
+ */
+var HarBuilder = function (options) {
+  this._options = options;
+  this._pageMap = [];
+};
+
+HarBuilder.prototype = {
+  // Public API
+
+  /**
+   * This is the main method used to build the entire result HAR data.
+   * The process is asynchronous since it can involve additional RDP
+   * communication (e.g. resolving long strings).
+   *
+   * @returns {Promise} A promise that resolves to the HAR object when
+   * the entire build process is done.
+   */
+  build: function () {
+    this.promises = [];
+
+    // Build basic structure for data.
+    let log = this.buildLog();
+
+    // Build entries.
+    let items = this._options.items;
+    for (let i = 0; i < items.length; i++) {
+      let file = items[i].attachment;
+      log.entries.push(this.buildEntry(log, file));
+    }
+
+    // Some data needs to be fetched from the backend during the
+    // build process, so wait till all is done.
+    let { resolve, promise } = defer();
+    all(this.promises).then(results => resolve({ log: log }));
+
+    return promise;
+  },
+
+  // Helpers
+
+  buildLog: function () {
+    return {
+      version: HAR_VERSION,
+      creator: {
+        name: appInfo.name,
+        version: appInfo.version
+      },
+      browser: {
+        name: appInfo.name,
+        version: appInfo.version
+      },
+      pages: [],
+      entries: [],
+    };
+  },
+
+  buildPage: function (file) {
+    let page = {};
+
+    // Page start time is set when the first request is processed
+    // (see buildEntry)
+    page.startedDateTime = 0;
+    page.id = "page_" + this._options.id;
+    page.title = this._options.title;
+
+    return page;
+  },
+
+  getPage: function (log, file) {
+    let id = this._options.id;
+    let page = this._pageMap[id];
+    if (page) {
+      return page;
+    }
+
+    this._pageMap[id] = page = this.buildPage(file);
+    log.pages.push(page);
+
+    return page;
+  },
+
+  buildEntry: function (log, file) {
+    let page = this.getPage(log, file);
+
+    let entry = {};
+    entry.pageref = page.id;
+    entry.startedDateTime = dateToJSON(new Date(file.startedMillis));
+    entry.time = file.endedMillis - file.startedMillis;
+
+    entry.request = this.buildRequest(file);
+    entry.response = this.buildResponse(file);
+    entry.cache = this.buildCache(file);
+    entry.timings = file.eventTimings ? file.eventTimings.timings : {};
+
+    if (file.remoteAddress) {
+      entry.serverIPAddress = file.remoteAddress;
+    }
+
+    if (file.remotePort) {
+      entry.connection = file.remotePort + "";
+    }
+
+    // Compute page load start time according to the first request start time.
+    if (!page.startedDateTime) {
+      page.startedDateTime = entry.startedDateTime;
+      page.pageTimings = this.buildPageTimings(page, file);
+    }
+
+    return entry;
+  },
+
+  buildPageTimings: function (page, file) {
+    // Event timing info isn't available
+    let timings = {
+      onContentLoad: -1,
+      onLoad: -1
+    };
+
+    return timings;
+  },
+
+  buildRequest: function (file) {
+    let request = {
+      bodySize: 0
+    };
+
+    request.method = file.method;
+    request.url = file.url;
+    request.httpVersion = file.httpVersion || "";
+
+    request.headers = this.buildHeaders(file.requestHeaders);
+    request.headers = this.appendHeadersPostData(request.headers, file);
+    request.cookies = this.buildCookies(file.requestCookies);
+
+    request.queryString = NetworkHelper.parseQueryString(
+      NetworkHelper.nsIURL(file.url).query) || [];
+
+    request.postData = this.buildPostData(file);
+
+    request.headersSize = file.requestHeaders.headersSize;
+
+    // Set request body size, but make sure the body is fetched
+    // from the backend.
+    if (file.requestPostData) {
+      this.fetchData(file.requestPostData.postData.text).then(value => {
+        request.bodySize = value.length;
+      });
+    }
+
+    return request;
+  },
+
+  /**
+   * Fetch all header values from the backend (if necessary) and
+   * build the result HAR structure.
+   *
+   * @param {Object} input Request or response header object.
+   */
+  buildHeaders: function (input) {
+    if (!input) {
+      return [];
+    }
+
+    return this.buildNameValuePairs(input.headers);
+  },
+
+  appendHeadersPostData: function (input = [], file) {
+    if (!file.requestPostData) {
+      return input;
+    }
+
+    this.fetchData(file.requestPostData.postData.text).then(value => {
+      let multipartHeaders = CurlUtils.getHeadersFromMultipartText(value);
+      for (let header of multipartHeaders) {
+        input.push(header);
+      }
+    });
+
+    return input;
+  },
+
+  buildCookies: function (input) {
+    if (!input) {
+      return [];
+    }
+
+    return this.buildNameValuePairs(input.cookies);
+  },
+
+  buildNameValuePairs: function (entries) {
+    let result = [];
+
+    // HAR requires headers array to be presented, so always
+    // return at least an empty array.
+    if (!entries) {
+      return result;
+    }
+
+    // Make sure header values are fully fetched from the server.
+    entries.forEach(entry => {
+      this.fetchData(entry.value).then(value => {
+        result.push({
+          name: entry.name,
+          value: value
+        });
+      });
+    });
+
+    return result;
+  },
+
+  buildPostData: function (file) {
+    let postData = {
+      mimeType: findValue(file.requestHeaders.headers, "content-type"),
+      params: [],
+      text: ""
+    };
+
+    if (!file.requestPostData) {
+      return postData;
+    }
+
+    if (file.requestPostData.postDataDiscarded) {
+      postData.comment = L10N.getStr("har.requestBodyNotIncluded");
+      return postData;
+    }
+
+    // Load request body from the backend.
+    this.fetchData(file.requestPostData.postData.text).then(postDataText => {
+      postData.text = postDataText;
+
+      // If we are dealing with URL encoded body, parse parameters.
+      let { headers } = file.requestHeaders;
+      if (CurlUtils.isUrlEncodedRequest({ headers, postDataText })) {
+        postData.mimeType = "application/x-www-form-urlencoded";
+
+        // Extract form parameters and produce nice HAR array.
+        getFormDataSections(
+          file.requestHeaders,
+          file.requestHeadersFromUploadStream,
+          file.requestPostData,
+          this._options.getString
+        ).then(formDataSections => {
+          formDataSections.forEach(section => {
+            let paramsArray = NetworkHelper.parseQueryString(section);
+            if (paramsArray) {
+              postData.params = [...postData.params, ...paramsArray];
+            }
+          });
+        });
+      }
+    });
+
+    return postData;
+  },
+
+  buildResponse: function (file) {
+    let response = {
+      status: 0
+    };
+
+    // Arbitrary value if it's aborted to make sure status has a number
+    if (file.status) {
+      response.status = parseInt(file.status, 10);
+    }
+
+    let responseHeaders = file.responseHeaders;
+
+    response.statusText = file.statusText || "";
+    response.httpVersion = file.httpVersion || "";
+
+    response.headers = this.buildHeaders(responseHeaders);
+    response.cookies = this.buildCookies(file.responseCookies);
+    response.content = this.buildContent(file);
+
+    let headers = responseHeaders ? responseHeaders.headers : null;
+    let headersSize = responseHeaders ? responseHeaders.headersSize : -1;
+
+    response.redirectURL = findValue(headers, "Location");
+    response.headersSize = headersSize;
+
+    // 'bodySize' is size of the received response body in bytes.
+    // Set to zero in case of responses coming from the cache (304).
+    // Set to -1 if the info is not available.
+    if (typeof file.transferredSize != "number") {
+      response.bodySize = (response.status == 304) ? 0 : -1;
+    } else {
+      response.bodySize = file.transferredSize;
+    }
+
+    return response;
+  },
+
+  buildContent: function (file) {
+    let content = {
+      mimeType: file.mimeType,
+      size: -1
+    };
+
+    let responseContent = file.responseContent;
+    if (responseContent && responseContent.content) {
+      content.size = responseContent.content.size;
+      content.encoding = responseContent.content.encoding;
+    }
+
+    let includeBodies = this._options.includeResponseBodies;
+    let contentDiscarded = responseContent ?
+      responseContent.contentDiscarded : false;
+
+    // The comment is appended only if the response content
+    // is explicitly discarded.
+    if (!includeBodies || contentDiscarded) {
+      content.comment = L10N.getStr("har.responseBodyNotIncluded");
+      return content;
+    }
+
+    if (responseContent) {
+      let text = responseContent.content.text;
+      this.fetchData(text).then(value => {
+        content.text = value;
+      });
+    }
+
+    return content;
+  },
+
+  buildCache: function (file) {
+    let cache = {};
+
+    if (!file.fromCache) {
+      return cache;
+    }
+
+    // There is no such info yet in the Net panel.
+    // cache.beforeRequest = {};
+
+    if (file.cacheEntry) {
+      cache.afterRequest = this.buildCacheEntry(file.cacheEntry);
+    } else {
+      cache.afterRequest = null;
+    }
+
+    return cache;
+  },
+
+  buildCacheEntry: function (cacheEntry) {
+    let cache = {};
+
+    cache.expires = findValue(cacheEntry, "Expires");
+    cache.lastAccess = findValue(cacheEntry, "Last Fetched");
+    cache.eTag = "";
+    cache.hitCount = findValue(cacheEntry, "Fetch Count");
+
+    return cache;
+  },
+
+  getBlockingEndTime: function (file) {
+    if (file.resolveStarted && file.connectStarted) {
+      return file.resolvingTime;
+    }
+
+    if (file.connectStarted) {
+      return file.connectingTime;
+    }
+
+    if (file.sendStarted) {
+      return file.sendingTime;
+    }
+
+    return (file.sendingTime > file.startTime) ?
+      file.sendingTime : file.waitingForTime;
+  },
+
+  // RDP Helpers
+
+  fetchData: function (string) {
+    let promise = this._options.getString(string).then(value => {
+      return value;
+    });
+
+    // Building HAR is asynchronous and not done till all
+    // collected promises are resolved.
+    this.promises.push(promise);
+
+    return promise;
+  }
+};
+
+// Helpers
+
+/**
+ * Find specified value within an array of name-value pairs
+ * (used for headers, cookies and cache entries)
+ */
+function findValue(arr, name) {
+  if (!arr) {
+    return "";
+  }
+
+  name = name.toLowerCase();
+  let result = arr.find(entry => entry.name.toLowerCase() == name);
+  return result ? result.value : "";
+}
+
+/**
+ * Generate HAR representation of a date.
+ * (YYYY-MM-DDThh:mm:ss.sTZD, e.g. 2009-07-24T19:20:30.45+01:00)
+ * See also HAR Schema: http://janodvarko.cz/har/viewer/
+ *
+ * Note: it would be great if we could utilize Date.toJSON(), but
+ * it doesn't return proper time zone offset.
+ *
+ * An example:
+ * This helper returns:    2015-05-29T16:10:30.424+02:00
+ * Date.toJSON() returns:  2015-05-29T14:10:30.424Z
+ *
+ * @param date {Date} The date object we want to convert.
+ */
+function dateToJSON(date) {
+  function f(n, c) {
+    if (!c) {
+      c = 2;
+    }
+    let s = new String(n);
+    while (s.length < c) {
+      s = "0" + s;
+    }
+    return s;
+  }
+
+  let result = date.getFullYear() + "-" +
+    f(date.getMonth() + 1) + "-" +
+    f(date.getDate()) + "T" +
+    f(date.getHours()) + ":" +
+    f(date.getMinutes()) + ":" +
+    f(date.getSeconds()) + "." +
+    f(date.getMilliseconds(), 3);
+
+  let offset = date.getTimezoneOffset();
+  let positive = offset > 0;
+
+  // Convert to positive number before using Math.floor (see issue 5512)
+  offset = Math.abs(offset);
+  let offsetHours = Math.floor(offset / 60);
+  let offsetMinutes = Math.floor(offset % 60);
+  let prettyOffset = (positive > 0 ? "-" : "+") + f(offsetHours) +
+    ":" + f(offsetMinutes);
+
+  return result + prettyOffset;
+}
+
+// Exports from this module
+exports.HarBuilder = HarBuilder;
diff --git a/devtools/client/netmonitor/har/har-collector.js b/devtools/client/netmonitor/har/har-collector.js
new file mode 100644
index 000000000..e3c510756
--- /dev/null
+++ b/devtools/client/netmonitor/har/har-collector.js
@@ -0,0 +1,462 @@
+/* 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/. */
+"use strict";
+
+const { defer, all } = require("promise");
+const { makeInfallible } = require("devtools/shared/DevToolsUtils");
+const Services = require("Services");
+
+// Helper tracer. Should be generic sharable by other modules (bug 1171927)
+const trace = {
+  log: function (...args) {
+  }
+};
+
+/**
+ * This object is responsible for collecting data related to all
+ * HTTP requests executed by the page (including inner iframes).
+ */
+function HarCollector(options) {
+  this.webConsoleClient = options.webConsoleClient;
+  this.debuggerClient = options.debuggerClient;
+
+  this.onNetworkEvent = this.onNetworkEvent.bind(this);
+  this.onNetworkEventUpdate = this.onNetworkEventUpdate.bind(this);
+  this.onRequestHeaders = this.onRequestHeaders.bind(this);
+  this.onRequestCookies = this.onRequestCookies.bind(this);
+  this.onRequestPostData = this.onRequestPostData.bind(this);
+  this.onResponseHeaders = this.onResponseHeaders.bind(this);
+  this.onResponseCookies = this.onResponseCookies.bind(this);
+  this.onResponseContent = this.onResponseContent.bind(this);
+  this.onEventTimings = this.onEventTimings.bind(this);
+
+  this.onPageLoadTimeout = this.onPageLoadTimeout.bind(this);
+
+  this.clear();
+}
+
+HarCollector.prototype = {
+  // Connection
+
+  start: function () {
+    this.debuggerClient.addListener("networkEvent", this.onNetworkEvent);
+    this.debuggerClient.addListener("networkEventUpdate",
+      this.onNetworkEventUpdate);
+  },
+
+  stop: function () {
+    this.debuggerClient.removeListener("networkEvent", this.onNetworkEvent);
+    this.debuggerClient.removeListener("networkEventUpdate",
+      this.onNetworkEventUpdate);
+  },
+
+  clear: function () {
+    // Any pending requests events will be ignored (they turn
+    // into zombies, since not present in the files array).
+    this.files = new Map();
+    this.items = [];
+    this.firstRequestStart = -1;
+    this.lastRequestStart = -1;
+    this.requests = [];
+  },
+
+  waitForHarLoad: function () {
+    // There should be yet another timeout e.g.:
+    // 'devtools.netmonitor.har.pageLoadTimeout'
+    // that should force export even if page isn't fully loaded.
+    let deferred = defer();
+    this.waitForResponses().then(() => {
+      trace.log("HarCollector.waitForHarLoad; DONE HAR loaded!");
+      deferred.resolve(this);
+    });
+
+    return deferred.promise;
+  },
+
+  waitForResponses: function () {
+    trace.log("HarCollector.waitForResponses; " + this.requests.length);
+
+    // All requests for additional data must be received to have complete
+    // HTTP info to generate the result HAR file. So, wait for all current
+    // promises. Note that new promises (requests) can be generated during the
+    // process of HTTP data collection.
+    return waitForAll(this.requests).then(() => {
+      // All responses are received from the backend now. We yet need to
+      // wait for a little while to see if a new request appears. If yes,
+      // lets's start gathering HTTP data again. If no, we can declare
+      // the page loaded.
+      // If some new requests appears in the meantime the promise will
+      // be rejected and we need to wait for responses all over again.
+      return this.waitForTimeout().then(() => {
+        // Page loaded!
+      }, () => {
+        trace.log("HarCollector.waitForResponses; NEW requests " +
+          "appeared during page timeout!");
+
+        // New requests executed, let's wait again.
+        return this.waitForResponses();
+      });
+    });
+  },
+
+  // Page Loaded Timeout
+
+  /**
+   * The page is loaded when there are no new requests within given period
+   * of time. The time is set in preferences:
+   * 'devtools.netmonitor.har.pageLoadedTimeout'
+   */
+  waitForTimeout: function () {
+    // The auto-export is not done if the timeout is set to zero (or less).
+    // This is useful in cases where the export is done manually through
+    // API exposed to the content.
+    let timeout = Services.prefs.getIntPref(
+      "devtools.netmonitor.har.pageLoadedTimeout");
+
+    trace.log("HarCollector.waitForTimeout; " + timeout);
+
+    this.pageLoadDeferred = defer();
+
+    if (timeout <= 0) {
+      this.pageLoadDeferred.resolve();
+      return this.pageLoadDeferred.promise;
+    }
+
+    this.pageLoadTimeout = setTimeout(this.onPageLoadTimeout, timeout);
+
+    return this.pageLoadDeferred.promise;
+  },
+
+  onPageLoadTimeout: function () {
+    trace.log("HarCollector.onPageLoadTimeout;");
+
+    // Ha, page has been loaded. Resolve the final timeout promise.
+    this.pageLoadDeferred.resolve();
+  },
+
+  resetPageLoadTimeout: function () {
+    // Remove the current timeout.
+    if (this.pageLoadTimeout) {
+      trace.log("HarCollector.resetPageLoadTimeout;");
+
+      clearTimeout(this.pageLoadTimeout);
+      this.pageLoadTimeout = null;
+    }
+
+    // Reject the current page load promise
+    if (this.pageLoadDeferred) {
+      this.pageLoadDeferred.reject();
+      this.pageLoadDeferred = null;
+    }
+  },
+
+  // Collected Data
+
+  getFile: function (actorId) {
+    return this.files.get(actorId);
+  },
+
+  getItems: function () {
+    return this.items;
+  },
+
+  // Event Handlers
+
+  onNetworkEvent: function (type, packet) {
+    // Skip events from different console actors.
+    if (packet.from != this.webConsoleClient.actor) {
+      return;
+    }
+
+    trace.log("HarCollector.onNetworkEvent; " + type, packet);
+
+    let { actor, startedDateTime, method, url, isXHR } = packet.eventActor;
+    let startTime = Date.parse(startedDateTime);
+
+    if (this.firstRequestStart == -1) {
+      this.firstRequestStart = startTime;
+    }
+
+    if (this.lastRequestEnd < startTime) {
+      this.lastRequestEnd = startTime;
+    }
+
+    let file = this.getFile(actor);
+    if (file) {
+      console.error("HarCollector.onNetworkEvent; ERROR " +
+                    "existing file conflict!");
+      return;
+    }
+
+    file = {
+      startedDeltaMillis: startTime - this.firstRequestStart,
+      startedMillis: startTime,
+      method: method,
+      url: url,
+      isXHR: isXHR
+    };
+
+    this.files.set(actor, file);
+
+    // Mimic the Net panel data structure
+    this.items.push({
+      attachment: file
+    });
+  },
+
+  onNetworkEventUpdate: function (type, packet) {
+    let actor = packet.from;
+
+    // Skip events from unknown actors (not in the list).
+    // It can happen when there are zombie requests received after
+    // the target is closed or multiple tabs are attached through
+    // one connection (one DebuggerClient object).
+    let file = this.getFile(packet.from);
+    if (!file) {
+      return;
+    }
+
+    trace.log("HarCollector.onNetworkEventUpdate; " +
+      packet.updateType, packet);
+
+    let includeResponseBodies = Services.prefs.getBoolPref(
+      "devtools.netmonitor.har.includeResponseBodies");
+
+    let request;
+    switch (packet.updateType) {
+      case "requestHeaders":
+        request = this.getData(actor, "getRequestHeaders",
+          this.onRequestHeaders);
+        break;
+      case "requestCookies":
+        request = this.getData(actor, "getRequestCookies",
+          this.onRequestCookies);
+        break;
+      case "requestPostData":
+        request = this.getData(actor, "getRequestPostData",
+          this.onRequestPostData);
+        break;
+      case "responseHeaders":
+        request = this.getData(actor, "getResponseHeaders",
+          this.onResponseHeaders);
+        break;
+      case "responseCookies":
+        request = this.getData(actor, "getResponseCookies",
+          this.onResponseCookies);
+        break;
+      case "responseStart":
+        file.httpVersion = packet.response.httpVersion;
+        file.status = packet.response.status;
+        file.statusText = packet.response.statusText;
+        break;
+      case "responseContent":
+        file.contentSize = packet.contentSize;
+        file.mimeType = packet.mimeType;
+        file.transferredSize = packet.transferredSize;
+
+        if (includeResponseBodies) {
+          request = this.getData(actor, "getResponseContent",
+            this.onResponseContent);
+        }
+        break;
+      case "eventTimings":
+        request = this.getData(actor, "getEventTimings",
+          this.onEventTimings);
+        break;
+    }
+
+    if (request) {
+      this.requests.push(request);
+    }
+
+    this.resetPageLoadTimeout();
+  },
+
+  getData: function (actor, method, callback) {
+    let deferred = defer();
+
+    if (!this.webConsoleClient[method]) {
+      console.error("HarCollector.getData; ERROR " +
+                    "Unknown method!");
+      return deferred.resolve();
+    }
+
+    let file = this.getFile(actor);
+
+    trace.log("HarCollector.getData; REQUEST " + method +
+      ", " + file.url, file);
+
+    this.webConsoleClient[method](actor, response => {
+      trace.log("HarCollector.getData; RESPONSE " + method +
+        ", " + file.url, response);
+
+      callback(response);
+      deferred.resolve(response);
+    });
+
+    return deferred.promise;
+  },
+
+  /**
+   * Handles additional information received for a "requestHeaders" packet.
+   *
+   * @param object response
+   *        The message received from the server.
+   */
+  onRequestHeaders: function (response) {
+    let file = this.getFile(response.from);
+    file.requestHeaders = response;
+
+    this.getLongHeaders(response.headers);
+  },
+
+  /**
+   * Handles additional information received for a "requestCookies" packet.
+   *
+   * @param object response
+   *        The message received from the server.
+   */
+  onRequestCookies: function (response) {
+    let file = this.getFile(response.from);
+    file.requestCookies = response;
+
+    this.getLongHeaders(response.cookies);
+  },
+
+  /**
+   * Handles additional information received for a "requestPostData" packet.
+   *
+   * @param object response
+   *        The message received from the server.
+   */
+  onRequestPostData: function (response) {
+    trace.log("HarCollector.onRequestPostData;", response);
+
+    let file = this.getFile(response.from);
+    file.requestPostData = response;
+
+    // Resolve long string
+    let text = response.postData.text;
+    if (typeof text == "object") {
+      this.getString(text).then(value => {
+        response.postData.text = value;
+      });
+    }
+  },
+
+  /**
+   * Handles additional information received for a "responseHeaders" packet.
+   *
+   * @param object response
+   *        The message received from the server.
+   */
+  onResponseHeaders: function (response) {
+    let file = this.getFile(response.from);
+    file.responseHeaders = response;
+
+    this.getLongHeaders(response.headers);
+  },
+
+  /**
+   * Handles additional information received for a "responseCookies" packet.
+   *
+   * @param object response
+   *        The message received from the server.
+   */
+  onResponseCookies: function (response) {
+    let file = this.getFile(response.from);
+    file.responseCookies = response;
+
+    this.getLongHeaders(response.cookies);
+  },
+
+  /**
+   * Handles additional information received for a "responseContent" packet.
+   *
+   * @param object response
+   *        The message received from the server.
+   */
+  onResponseContent: function (response) {
+    let file = this.getFile(response.from);
+    file.responseContent = response;
+
+    // Resolve long string
+    let text = response.content.text;
+    if (typeof text == "object") {
+      this.getString(text).then(value => {
+        response.content.text = value;
+      });
+    }
+  },
+
+  /**
+   * Handles additional information received for a "eventTimings" packet.
+   *
+   * @param object response
+   *        The message received from the server.
+   */
+  onEventTimings: function (response) {
+    let file = this.getFile(response.from);
+    file.eventTimings = response;
+
+    let totalTime = response.totalTime;
+    file.totalTime = totalTime;
+    file.endedMillis = file.startedMillis + totalTime;
+  },
+
+  // Helpers
+
+  getLongHeaders: makeInfallible(function (headers) {
+    for (let header of headers) {
+      if (typeof header.value == "object") {
+        this.getString(header.value).then(value => {
+          header.value = value;
+        });
+      }
+    }
+  }),
+
+  /**
+   * Fetches the full text of a string.
+   *
+   * @param object | string stringGrip
+   *        The long string grip containing the corresponding actor.
+   *        If you pass in a plain string (by accident or because you're lazy),
+   *        then a promise of the same string is simply returned.
+   * @return object Promise
+   *         A promise that is resolved when the full string contents
+   *         are available, or rejected if something goes wrong.
+   */
+  getString: function (stringGrip) {
+    let promise = this.webConsoleClient.getString(stringGrip);
+    this.requests.push(promise);
+    return promise;
+  }
+};
+
+// Helpers
+
+/**
+ * Helper function that allows to wait for array of promises. It is
+ * possible to dynamically add new promises in the provided array.
+ * The function will wait even for the newly added promises.
+ * (this isn't possible with the default Promise.all);
+ */
+function waitForAll(promises) {
+  // Remove all from the original array and get clone of it.
+  let clone = promises.splice(0, promises.length);
+
+  // Wait for all promises in the given array.
+  return all(clone).then(() => {
+    // If there are new promises (in the original array)
+    // to wait for - chain them!
+    if (promises.length) {
+      return waitForAll(promises);
+    }
+    return undefined;
+  });
+}
+
+// Exports from this module
+exports.HarCollector = HarCollector;
diff --git a/devtools/client/netmonitor/har/har-exporter.js b/devtools/client/netmonitor/har/har-exporter.js
new file mode 100644
index 000000000..972cf87dc
--- /dev/null
+++ b/devtools/client/netmonitor/har/har-exporter.js
@@ -0,0 +1,187 @@
+/* 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/. */
+
+"use strict";
+/* eslint-disable mozilla/reject-some-requires */
+const { Cc, Ci } = require("chrome");
+const Services = require("Services");
+/* eslint-disable mozilla/reject-some-requires */
+const { XPCOMUtils } = require("resource://gre/modules/XPCOMUtils.jsm");
+const { resolve } = require("promise");
+const { HarUtils } = require("./har-utils.js");
+const { HarBuilder } = require("./har-builder.js");
+
+XPCOMUtils.defineLazyGetter(this, "clipboardHelper", function () {
+  return Cc["@mozilla.org/widget/clipboardhelper;1"]
+    .getService(Ci.nsIClipboardHelper);
+});
+
+var uid = 1;
+
+// Helper tracer. Should be generic sharable by other modules (bug 1171927)
+const trace = {
+  log: function (...args) {
+  }
+};
+
+/**
+ * This object represents the main public API designed to access
+ * Network export logic. Clients, such as the Network panel itself,
+ * should use this API to export collected HTTP data from the panel.
+ */
+const HarExporter = {
+  // Public API
+
+  /**
+   * Save collected HTTP data from the Network panel into HAR file.
+   *
+   * @param Object options
+   *        Configuration object
+   *
+   * The following options are supported:
+   *
+   * - includeResponseBodies {Boolean}: If set to true, HTTP response bodies
+   *   are also included in the HAR file (can produce significantly bigger
+   *   amount of data).
+   *
+   * - items {Array}: List of Network requests to be exported. It is possible
+   *   to use directly: NetMonitorView.RequestsMenu.items
+   *
+   * - jsonp {Boolean}: If set to true the export format is HARP (support
+   *   for JSONP syntax).
+   *
+   * - jsonpCallback {String}: Default name of JSONP callback (used for
+   *   HARP format).
+   *
+   * - compress {Boolean}: If set to true the final HAR file is zipped.
+   *   This represents great disk-space optimization.
+   *
+   * - defaultFileName {String}: Default name of the target HAR file.
+   *   The default file name supports formatters, see:
+   *   https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toLocaleFormat
+   *
+   * - defaultLogDir {String}: Default log directory for automated logs.
+   *
+   * - id {String}: ID of the page (used in the HAR file).
+   *
+   * - title {String}: Title of the page (used in the HAR file).
+   *
+   * - forceExport {Boolean}: The result HAR file is created even if
+   *   there are no HTTP entries.
+   */
+  save: function (options) {
+    // Set default options related to save operation.
+    options.defaultFileName = Services.prefs.getCharPref(
+      "devtools.netmonitor.har.defaultFileName");
+    options.compress = Services.prefs.getBoolPref(
+      "devtools.netmonitor.har.compress");
+
+    // Get target file for exported data. Bail out, if the user
+    // presses cancel.
+    let file = HarUtils.getTargetFile(options.defaultFileName,
+      options.jsonp, options.compress);
+
+    if (!file) {
+      return resolve();
+    }
+
+    trace.log("HarExporter.save; " + options.defaultFileName, options);
+
+    return this.fetchHarData(options).then(jsonString => {
+      if (!HarUtils.saveToFile(file, jsonString, options.compress)) {
+        let msg = "Failed to save HAR file at: " + options.defaultFileName;
+        console.error(msg);
+      }
+      return jsonString;
+    });
+  },
+
+  /**
+   * Copy HAR string into the clipboard.
+   *
+   * @param Object options
+   *        Configuration object, see save() for detailed description.
+   */
+  copy: function (options) {
+    return this.fetchHarData(options).then(jsonString => {
+      clipboardHelper.copyString(jsonString);
+      return jsonString;
+    });
+  },
+
+  // Helpers
+
+  fetchHarData: function (options) {
+    // Generate page ID
+    options.id = options.id || uid++;
+
+    // Set default generic HAR export options.
+    options.jsonp = options.jsonp ||
+      Services.prefs.getBoolPref("devtools.netmonitor.har.jsonp");
+    options.includeResponseBodies = options.includeResponseBodies ||
+      Services.prefs.getBoolPref(
+        "devtools.netmonitor.har.includeResponseBodies");
+    options.jsonpCallback = options.jsonpCallback ||
+      Services.prefs.getCharPref("devtools.netmonitor.har.jsonpCallback");
+    options.forceExport = options.forceExport ||
+      Services.prefs.getBoolPref("devtools.netmonitor.har.forceExport");
+
+    // Build HAR object.
+    return this.buildHarData(options).then(har => {
+      // Do not export an empty HAR file, unless the user
+      // explicitly says so (using the forceExport option).
+      if (!har.log.entries.length && !options.forceExport) {
+        return resolve();
+      }
+
+      let jsonString = this.stringify(har);
+      if (!jsonString) {
+        return resolve();
+      }
+
+      // If JSONP is wanted, wrap the string in a function call
+      if (options.jsonp) {
+        // This callback name is also used in HAR Viewer by default.
+        // http://www.softwareishard.com/har/viewer/
+        let callbackName = options.jsonpCallback || "onInputData";
+        jsonString = callbackName + "(" + jsonString + ");";
+      }
+
+      return jsonString;
+    }).then(null, function onError(err) {
+      console.error(err);
+    });
+  },
+
+  /**
+   * Build HAR data object. This object contains all HTTP data
+   * collected by the Network panel. The process is asynchronous
+   * since it can involve additional RDP communication (e.g. resolving
+   * long strings).
+   */
+  buildHarData: function (options) {
+    // Build HAR object from collected data.
+    let builder = new HarBuilder(options);
+    return builder.build();
+  },
+
+  /**
+   * Build JSON string from the HAR data object.
+   */
+  stringify: function (har) {
+    if (!har) {
+      return null;
+    }
+
+    try {
+      return JSON.stringify(har, null, "  ");
+    } catch (err) {
+      console.error(err);
+      return undefined;
+    }
+  },
+};
+
+// Exports from this module
+exports.HarExporter = HarExporter;
diff --git a/devtools/client/netmonitor/har/har-utils.js b/devtools/client/netmonitor/har/har-utils.js
new file mode 100644
index 000000000..aa9bd3811
--- /dev/null
+++ b/devtools/client/netmonitor/har/har-utils.js
@@ -0,0 +1,189 @@
+/* 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/. */
+
+"use strict";
+/* eslint-disable mozilla/reject-some-requires */
+const { Ci, Cc, CC } = require("chrome");
+/* eslint-disable mozilla/reject-some-requires */
+const { XPCOMUtils } = require("resource://gre/modules/XPCOMUtils.jsm");
+
+XPCOMUtils.defineLazyGetter(this, "dirService", function () {
+  return Cc["@mozilla.org/file/directory_service;1"]
+    .getService(Ci.nsIProperties);
+});
+
+XPCOMUtils.defineLazyGetter(this, "ZipWriter", function () {
+  return CC("@mozilla.org/zipwriter;1", "nsIZipWriter");
+});
+
+XPCOMUtils.defineLazyGetter(this, "LocalFile", function () {
+  return new CC("@mozilla.org/file/local;1", "nsILocalFile", "initWithPath");
+});
+
+XPCOMUtils.defineLazyGetter(this, "getMostRecentBrowserWindow", function () {
+  return require("sdk/window/utils").getMostRecentBrowserWindow;
+});
+
+const nsIFilePicker = Ci.nsIFilePicker;
+
+const OPEN_FLAGS = {
+  RDONLY: parseInt("0x01", 16),
+  WRONLY: parseInt("0x02", 16),
+  CREATE_FILE: parseInt("0x08", 16),
+  APPEND: parseInt("0x10", 16),
+  TRUNCATE: parseInt("0x20", 16),
+  EXCL: parseInt("0x80", 16)
+};
+
+/**
+ * Helper API for HAR export features.
+ */
+var HarUtils = {
+  /**
+   * Open File Save As dialog and let the user pick the proper file
+   * location for generated HAR log.
+   */
+  getTargetFile: function (fileName, jsonp, compress) {
+    let browser = getMostRecentBrowserWindow();
+
+    let fp = Cc["@mozilla.org/filepicker;1"].createInstance(nsIFilePicker);
+    fp.init(browser, null, nsIFilePicker.modeSave);
+    fp.appendFilter(
+      "HTTP Archive Files", "*.har; *.harp; *.json; *.jsonp; *.zip");
+    fp.appendFilters(nsIFilePicker.filterAll | nsIFilePicker.filterText);
+    fp.filterIndex = 1;
+
+    fp.defaultString = this.getHarFileName(fileName, jsonp, compress);
+
+    let rv = fp.show();
+    if (rv == nsIFilePicker.returnOK || rv == nsIFilePicker.returnReplace) {
+      return fp.file;
+    }
+
+    return null;
+  },
+
+  getHarFileName: function (defaultFileName, jsonp, compress) {
+    let extension = jsonp ? ".harp" : ".har";
+
+    // Read more about toLocaleFormat & format string.
+    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toLocaleFormat
+    let now = new Date();
+    let name = now.toLocaleFormat(defaultFileName);
+    name = name.replace(/\:/gm, "-", "");
+    name = name.replace(/\//gm, "_", "");
+
+    let fileName = name + extension;
+
+    // Default file extension is zip if compressing is on.
+    if (compress) {
+      fileName += ".zip";
+    }
+
+    return fileName;
+  },
+
+  /**
+   * Save HAR string into a given file. The file might be compressed
+   * if specified in the options.
+   *
+   * @param {File} file Target file where the HAR string (JSON)
+   * should be stored.
+   * @param {String} jsonString HAR data (JSON or JSONP)
+   * @param {Boolean} compress The result file is zipped if set to true.
+   */
+  saveToFile: function (file, jsonString, compress) {
+    let openFlags = OPEN_FLAGS.WRONLY | OPEN_FLAGS.CREATE_FILE |
+      OPEN_FLAGS.TRUNCATE;
+
+    try {
+      let foStream = Cc["@mozilla.org/network/file-output-stream;1"]
+        .createInstance(Ci.nsIFileOutputStream);
+
+      let permFlags = parseInt("0666", 8);
+      foStream.init(file, openFlags, permFlags, 0);
+
+      let convertor = Cc["@mozilla.org/intl/converter-output-stream;1"]
+        .createInstance(Ci.nsIConverterOutputStream);
+      convertor.init(foStream, "UTF-8", 0, 0);
+
+      // The entire jsonString can be huge so, write the data in chunks.
+      let chunkLength = 1024 * 1024;
+      for (let i = 0; i <= jsonString.length; i++) {
+        let data = jsonString.substr(i, chunkLength + 1);
+        if (data) {
+          convertor.writeString(data);
+        }
+
+        i = i + chunkLength;
+      }
+
+      // this closes foStream
+      convertor.close();
+    } catch (err) {
+      console.error(err);
+      return false;
+    }
+
+    // If no compressing then bail out.
+    if (!compress) {
+      return true;
+    }
+
+    // Remember name of the original file, it'll be replaced by a zip file.
+    let originalFilePath = file.path;
+    let originalFileName = file.leafName;
+
+    try {
+      // Rename using unique name (the file is going to be removed).
+      file.moveTo(null, "temp" + (new Date()).getTime() + "temphar");
+
+      // Create compressed file with the original file path name.
+      let zipFile = Cc["@mozilla.org/file/local;1"]
+        .createInstance(Ci.nsILocalFile);
+      zipFile.initWithPath(originalFilePath);
+
+      // The file within the zipped file doesn't use .zip extension.
+      let fileName = originalFileName;
+      if (fileName.indexOf(".zip") == fileName.length - 4) {
+        fileName = fileName.substr(0, fileName.indexOf(".zip"));
+      }
+
+      let zip = new ZipWriter();
+      zip.open(zipFile, openFlags);
+      zip.addEntryFile(fileName, Ci.nsIZipWriter.COMPRESSION_DEFAULT,
+        file, false);
+      zip.close();
+
+      // Remove the original file (now zipped).
+      file.remove(true);
+      return true;
+    } catch (err) {
+      console.error(err);
+
+      // Something went wrong (disk space?) rename the original file back.
+      file.moveTo(null, originalFileName);
+    }
+
+    return false;
+  },
+
+  getLocalDirectory: function (path) {
+    let dir;
+
+    if (!path) {
+      dir = dirService.get("ProfD", Ci.nsILocalFile);
+      dir.append("har");
+      dir.append("logs");
+    } else {
+      dir = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFile);
+      dir.initWithPath(path);
+    }
+
+    return dir;
+  },
+};
+
+// Exports from this module
+exports.HarUtils = HarUtils;
diff --git a/devtools/client/netmonitor/har/moz.build b/devtools/client/netmonitor/har/moz.build
new file mode 100644
index 000000000..f6dd4aff8
--- /dev/null
+++ b/devtools/client/netmonitor/har/moz.build
@@ -0,0 +1,15 @@
+# vim: set filetype=python:
+# 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/.
+
+DevToolsModules(
+    'har-automation.js',
+    'har-builder.js',
+    'har-collector.js',
+    'har-exporter.js',
+    'har-utils.js',
+    'toolbox-overlay.js',
+)
+
+BROWSER_CHROME_MANIFESTS += ['test/browser.ini']
diff --git a/devtools/client/netmonitor/har/test/.eslintrc.js b/devtools/client/netmonitor/har/test/.eslintrc.js
new file mode 100644
index 000000000..698ae9181
--- /dev/null
+++ b/devtools/client/netmonitor/har/test/.eslintrc.js
@@ -0,0 +1,6 @@
+"use strict";
+
+module.exports = {
+  // Extend from the shared list of defined globals for mochitests.
+  "extends": "../../../../.eslintrc.mochitests.js"
+};
diff --git a/devtools/client/netmonitor/har/test/browser.ini b/devtools/client/netmonitor/har/test/browser.ini
new file mode 100644
index 000000000..14d4f846f
--- /dev/null
+++ b/devtools/client/netmonitor/har/test/browser.ini
@@ -0,0 +1,12 @@
+[DEFAULT]
+tags = devtools
+subsuite = clipboard
+support-files =
+  head.js
+  html_har_post-data-test-page.html
+  !/devtools/client/netmonitor/test/head.js
+  !/devtools/client/netmonitor/test/html_simple-test-page.html
+
+[browser_net_har_copy_all_as_har.js]
+[browser_net_har_post_data.js]
+[browser_net_har_throttle_upload.js]
diff --git a/devtools/client/netmonitor/har/test/browser_net_har_copy_all_as_har.js b/devtools/client/netmonitor/har/test/browser_net_har_copy_all_as_har.js
new file mode 100644
index 000000000..10df7aba6
--- /dev/null
+++ b/devtools/client/netmonitor/har/test/browser_net_har_copy_all_as_har.js
@@ -0,0 +1,49 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Basic tests for exporting Network panel content into HAR format.
+ */
+add_task(function* () {
+  let { tab, monitor } = yield initNetMonitor(SIMPLE_URL);
+
+  info("Starting test... ");
+
+  let { NetMonitorView } = monitor.panelWin;
+  let { RequestsMenu } = NetMonitorView;
+
+  RequestsMenu.lazyUpdate = false;
+
+  let wait = waitForNetworkEvents(monitor, 1);
+  tab.linkedBrowser.reload();
+  yield wait;
+
+  yield RequestsMenu.contextMenu.copyAllAsHar();
+
+  let jsonString = SpecialPowers.getClipboardData("text/unicode");
+  let har = JSON.parse(jsonString);
+
+  // Check out HAR log
+  isnot(har.log, null, "The HAR log must exist");
+  is(har.log.creator.name, "Firefox", "The creator field must be set");
+  is(har.log.browser.name, "Firefox", "The browser field must be set");
+  is(har.log.pages.length, 1, "There must be one page");
+  is(har.log.entries.length, 1, "There must be one request");
+
+  let entry = har.log.entries[0];
+  is(entry.request.method, "GET", "Check the method");
+  is(entry.request.url, SIMPLE_URL, "Check the URL");
+  is(entry.request.headers.length, 9, "Check number of request headers");
+  is(entry.response.status, 200, "Check response status");
+  is(entry.response.statusText, "OK", "Check response status text");
+  is(entry.response.headers.length, 6, "Check number of response headers");
+  is(entry.response.content.mimeType, // eslint-disable-line
+    "text/html", "Check response content type"); // eslint-disable-line
+  isnot(entry.response.content.text, undefined, // eslint-disable-line
+    "Check response body");
+  isnot(entry.timings, undefined, "Check timings");
+
+  return teardown(monitor);
+});
diff --git a/devtools/client/netmonitor/har/test/browser_net_har_post_data.js b/devtools/client/netmonitor/har/test/browser_net_har_post_data.js
new file mode 100644
index 000000000..b3d611ca7
--- /dev/null
+++ b/devtools/client/netmonitor/har/test/browser_net_har_post_data.js
@@ -0,0 +1,44 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Tests for exporting POST data into HAR format.
+ */
+add_task(function* () {
+  let { tab, monitor } = yield initNetMonitor(
+    HAR_EXAMPLE_URL + "html_har_post-data-test-page.html");
+
+  info("Starting test... ");
+
+  let { NetMonitorView } = monitor.panelWin;
+  let { RequestsMenu } = NetMonitorView;
+
+  RequestsMenu.lazyUpdate = false;
+
+  // Execute one POST request on the page and wait till its done.
+  let wait = waitForNetworkEvents(monitor, 0, 1);
+  yield ContentTask.spawn(tab.linkedBrowser, {}, function* () {
+    content.wrappedJSObject.executeTest();
+  });
+  yield wait;
+
+  // Copy HAR into the clipboard (asynchronous).
+  let jsonString = yield RequestsMenu.contextMenu.copyAllAsHar();
+  let har = JSON.parse(jsonString);
+
+  // Check out the HAR log.
+  isnot(har.log, null, "The HAR log must exist");
+  is(har.log.pages.length, 1, "There must be one page");
+  is(har.log.entries.length, 1, "There must be one request");
+
+  let entry = har.log.entries[0];
+  is(entry.request.postData.mimeType, "application/json",
+    "Check post data content type");
+  is(entry.request.postData.text, "{'first': 'John', 'last': 'Doe'}",
+    "Check post data payload");
+
+  // Clean up
+  return teardown(monitor);
+});
diff --git a/devtools/client/netmonitor/har/test/browser_net_har_throttle_upload.js b/devtools/client/netmonitor/har/test/browser_net_har_throttle_upload.js
new file mode 100644
index 000000000..c0e424172
--- /dev/null
+++ b/devtools/client/netmonitor/har/test/browser_net_har_throttle_upload.js
@@ -0,0 +1,75 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test timing of upload when throttling.
+
+"use strict";
+
+add_task(function* () {
+  yield throttleUploadTest(true);
+  yield throttleUploadTest(false);
+});
+
+function* throttleUploadTest(actuallyThrottle) {
+  let { tab, monitor } = yield initNetMonitor(
+    HAR_EXAMPLE_URL + "html_har_post-data-test-page.html");
+
+  info("Starting test... (actuallyThrottle = " + actuallyThrottle + ")");
+
+  let { NetMonitorView } = monitor.panelWin;
+  let { RequestsMenu } = NetMonitorView;
+
+  const size = 4096;
+  const uploadSize = actuallyThrottle ? size / 3 : 0;
+
+  const request = {
+    "NetworkMonitor.throttleData": {
+      roundTripTimeMean: 0,
+      roundTripTimeMax: 0,
+      downloadBPSMean: 200000,
+      downloadBPSMax: 200000,
+      uploadBPSMean: uploadSize,
+      uploadBPSMax: uploadSize,
+    },
+  };
+  let client = monitor._controller.webConsoleClient;
+
+  info("sending throttle request");
+  let deferred = promise.defer();
+  client.setPreferences(request, response => {
+    deferred.resolve(response);
+  });
+  yield deferred.promise;
+
+  RequestsMenu.lazyUpdate = false;
+
+  // Execute one POST request on the page and wait till its done.
+  let wait = waitForNetworkEvents(monitor, 0, 1);
+  yield ContentTask.spawn(tab.linkedBrowser, { size }, function* (args) {
+    content.wrappedJSObject.executeTest2(args.size);
+  });
+  yield wait;
+
+  // Copy HAR into the clipboard (asynchronous).
+  let jsonString = yield RequestsMenu.contextMenu.copyAllAsHar();
+  let har = JSON.parse(jsonString);
+
+  // Check out the HAR log.
+  isnot(har.log, null, "The HAR log must exist");
+  is(har.log.pages.length, 1, "There must be one page");
+  is(har.log.entries.length, 1, "There must be one request");
+
+  let entry = har.log.entries[0];
+  is(entry.request.postData.text, "x".repeat(size),
+     "Check post data payload");
+
+  const wasTwoSeconds = entry.timings.send >= 2000;
+  if (actuallyThrottle) {
+    ok(wasTwoSeconds, "upload should have taken more than 2 seconds");
+  } else {
+    ok(!wasTwoSeconds, "upload should not have taken more than 2 seconds");
+  }
+
+  // Clean up
+  yield teardown(monitor);
+}
diff --git a/devtools/client/netmonitor/har/test/head.js b/devtools/client/netmonitor/har/test/head.js
new file mode 100644
index 000000000..22eb87fe6
--- /dev/null
+++ b/devtools/client/netmonitor/har/test/head.js
@@ -0,0 +1,14 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/* eslint no-unused-vars: [2, {"vars": "local", "args": "none"}] */
+/* import-globals-from ../../test/head.js */
+
+// Load the NetMonitor head.js file to share its API.
+var netMonitorHead = "chrome://mochitests/content/browser/devtools/client/netmonitor/test/head.js";
+Services.scriptloader.loadSubScript(netMonitorHead, this);
+
+// Directory with HAR related test files.
+const HAR_EXAMPLE_URL = "http://example.com/browser/devtools/client/netmonitor/har/test/";
diff --git a/devtools/client/netmonitor/har/test/html_har_post-data-test-page.html b/devtools/client/netmonitor/har/test/html_har_post-data-test-page.html
new file mode 100644
index 000000000..816dad08e
--- /dev/null
+++ b/devtools/client/netmonitor/har/test/html_har_post-data-test-page.html
@@ -0,0 +1,39 @@
+<!-- Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/ -->
+<!doctype html>
+
+<html>
+  <head>
+    <meta charset="utf-8"/>
+    <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
+    <meta http-equiv="Pragma" content="no-cache" />
+    <meta http-equiv="Expires" content="0" />
+    <title>Network Monitor Test Page</title>
+  </head>
+
+  <body>
+    <p>HAR POST data test</p>
+
+    <script type="text/javascript">
+      function post(aAddress, aData) {
+        var xhr = new XMLHttpRequest();
+        xhr.open("POST", aAddress, true);
+        xhr.setRequestHeader("Content-Type", "application/json");
+        xhr.send(aData);
+      }
+
+      function executeTest() {
+        var url = "html_har_post-data-test-page.html";
+        var data = "{'first': 'John', 'last': 'Doe'}";
+        post(url, data);
+      }
+
+      function executeTest2(size) {
+        var url = "html_har_post-data-test-page.html";
+        var data = "x".repeat(size);
+        post(url, data);
+      }
+    </script>
+  </body>
+
+</html>
diff --git a/devtools/client/netmonitor/har/toolbox-overlay.js b/devtools/client/netmonitor/har/toolbox-overlay.js
new file mode 100644
index 000000000..4ba5d08a9
--- /dev/null
+++ b/devtools/client/netmonitor/har/toolbox-overlay.js
@@ -0,0 +1,85 @@
+/* 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/. */
+"use strict";
+
+const Services = require("Services");
+
+loader.lazyRequireGetter(this, "HarAutomation", "devtools/client/netmonitor/har/har-automation", true);
+
+// Map of all created overlays. There is always one instance of
+// an overlay per Toolbox instance (i.e. one per browser tab).
+const overlays = new WeakMap();
+
+/**
+ * This object is responsible for initialization and cleanup for HAR
+ * export feature. It represents an overlay for the Toolbox
+ * following the same life time by listening to its events.
+ *
+ * HAR APIs are designed for integration with tools (such as Selenium)
+ * that automates the browser. Primarily, it is for automating web apps
+ * and getting HAR file for every loaded page.
+ */
+function ToolboxOverlay(toolbox) {
+  this.toolbox = toolbox;
+
+  this.onInit = this.onInit.bind(this);
+  this.onDestroy = this.onDestroy.bind(this);
+
+  this.toolbox.on("ready", this.onInit);
+  this.toolbox.on("destroy", this.onDestroy);
+}
+
+ToolboxOverlay.prototype = {
+  /**
+   * Executed when the toolbox is ready.
+   */
+  onInit: function () {
+    let autoExport = Services.prefs.getBoolPref(
+      "devtools.netmonitor.har.enableAutoExportToFile");
+
+    if (!autoExport) {
+      return;
+    }
+
+    this.initAutomation();
+  },
+
+  /**
+   * Executed when the toolbox is destroyed.
+   */
+  onDestroy: function (eventId, toolbox) {
+    this.destroyAutomation();
+  },
+
+  // Automation
+
+  initAutomation: function () {
+    this.automation = new HarAutomation(this.toolbox);
+  },
+
+  destroyAutomation: function () {
+    if (this.automation) {
+      this.automation.destroy();
+    }
+  },
+};
+
+// Registration
+function register(toolbox) {
+  if (overlays.has(toolbox)) {
+    throw Error("There is an existing overlay for the toolbox");
+  }
+
+  // Instantiate an overlay for the toolbox.
+  let overlay = new ToolboxOverlay(toolbox);
+  overlays.set(toolbox, overlay);
+}
+
+function get(toolbox) {
+  return overlays.get(toolbox);
+}
+
+// Exports from this module
+exports.register = register;
+exports.get = get;