remote/cdp/JSONHandler.jsm

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 "use strict";
   6
   7 var EXPORTED_SYMBOLS = ["JSONHandler"];
   8
   9 const { XPCOMUtils } = ChromeUtils.import(
  10   "resource://gre/modules/XPCOMUtils.jsm"
  11 );
  12
  13 XPCOMUtils.defineLazyModuleGetters(this, {
  14   Services: "resource://gre/modules/Services.jsm",
  15
  16   HTTP_404: "chrome://remote/content/server/HTTPD.jsm",
  17   HTTP_505: "chrome://remote/content/server/HTTPD.jsm",
  18   Log: "chrome://remote/content/shared/Log.jsm",
  19   Protocol: "chrome://remote/content/cdp/Protocol.jsm",
  20   RemoteAgentError: "chrome://remote/content/cdp/Error.jsm",
  21 });
  22
  23 class JSONHandler {
  24   constructor(cdp) {
  25     this.cdp = cdp;
  26     this.routes = {
  27       "/json/version": this.getVersion.bind(this),
  28       "/json/protocol": this.getProtocol.bind(this),
  29       "/json/list": this.getTargetList.bind(this),
  30     };
  31   }
  32
  33   getVersion() {
  34     const mainProcessTarget = this.cdp.targetList.getMainProcessTarget();
  35
  36     const { userAgent } = Cc[
  37       "@mozilla.org/network/protocol;1?name=http"
  38     ].getService(Ci.nsIHttpProtocolHandler);
  39
  40     return {
  41       Browser: `${Services.appinfo.name}/${Services.appinfo.version}`,
  42       "Protocol-Version": "1.0",
  43       "User-Agent": userAgent,
  44       "V8-Version": "1.0",
  45       "WebKit-Version": "1.0",
  46       webSocketDebuggerUrl: mainProcessTarget.toJSON().webSocketDebuggerUrl,
  47     };
  48   }
  49
  50   getProtocol() {
  51     return Protocol.Description;
  52   }
  53
  54   getTargetList() {
  55     return [...this.cdp.targetList];
  56   }
  57
  58   // nsIHttpRequestHandler
  59
  60   handle(request, response) {
  61     if (request.method != "GET") {
  62       throw HTTP_404;
  63     }
  64
  65     if (!(request.path in this.routes)) {
  66       throw HTTP_404;
  67     }
  68
  69     try {
  70       const body = this.routes[request.path]();
  71       const payload = JSON.stringify(body, null, Log.verbose ? "\t" : null);
  72
  73       response.setStatusLine(request.httpVersion, 200, "OK");
  74       response.setHeader("Content-Type", "application/json");
  75       response.write(payload);
  76     } catch (e) {
  77       new RemoteAgentError(e).notify();
  78       throw HTTP_505;
  79     }
  80   }
  81
  82   // XPCOM
  83
  84   get QueryInterface() {
  85     return ChromeUtils.generateQI(["nsIHttpRequestHandler"]);
  86   }
  87 }