The Tor Browser / file comparison
comparison: toolkit/components/social/MessagePortWorker.js
toolkit/components/social/MessagePortWorker.js
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:f69ecc93b0e4 |
|---|---|
| 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 // Note: this is never instantiated in chrome - the source is sent across | |
| 6 // to the worker and it is evaluated there and created in response to a | |
| 7 // port-create message we send. | |
| 8 function WorkerPort(portid) { | |
| 9 AbstractPort.call(this, portid); | |
| 10 } | |
| 11 | |
| 12 WorkerPort.prototype = { | |
| 13 __proto__: AbstractPort.prototype, | |
| 14 _portType: "worker", | |
| 15 | |
| 16 _dopost: function fw_WorkerPort_dopost(data) { | |
| 17 // postMessage is injected into the sandbox. | |
| 18 _postMessage(data, "*"); | |
| 19 }, | |
| 20 | |
| 21 _onerror: function fw_WorkerPort_onerror(err) { | |
| 22 // We throw an object that "derives" from the exception, but with | |
| 23 // a more detailed message. | |
| 24 throw {message: "Port " + this + " handler failed: " + err.message, __proto__: err}; | |
| 25 } | |
| 26 } | |
| 27 | |
| 28 function importScripts() { | |
| 29 for (var i=0; i < arguments.length; i++) { | |
| 30 // load the url *synchronously* | |
| 31 var scriptURL = arguments[i]; | |
| 32 var xhr = new XMLHttpRequest(); | |
| 33 xhr.open('GET', scriptURL, false); | |
| 34 xhr.onreadystatechange = function(aEvt) { | |
| 35 if (xhr.readyState == 4) { | |
| 36 if (xhr.status == 200 || xhr.status == 0) { | |
| 37 _evalInSandbox(xhr.responseText, scriptURL); | |
| 38 } | |
| 39 else { | |
| 40 throw new Error("Unable to importScripts ["+scriptURL+"], status " + xhr.status) | |
| 41 } | |
| 42 } | |
| 43 }; | |
| 44 xhr.send(null); | |
| 45 } | |
| 46 } | |
| 47 | |
| 48 // This function is magically injected into the sandbox and used there. | |
| 49 // Thus, it is only ever dealing with "worker" ports. | |
| 50 function __initWorkerMessageHandler() { | |
| 51 | |
| 52 let ports = {}; // all "worker" ports currently alive, keyed by ID. | |
| 53 | |
| 54 function messageHandler(event) { | |
| 55 // We will ignore all messages destined for otherType. | |
| 56 let data = event.data; | |
| 57 let portid = data.portId; | |
| 58 let port; | |
| 59 if (!data.portFromType || data.portFromType === "worker") { | |
| 60 // this is a message posted by ourself so ignore it. | |
| 61 return; | |
| 62 } | |
| 63 switch (data.portTopic) { | |
| 64 case "port-create": | |
| 65 // a new port was created on the "client" side - create a new worker | |
| 66 // port and store it in the map | |
| 67 port = new WorkerPort(portid); | |
| 68 ports[portid] = port; | |
| 69 // and call the "onconnect" handler. | |
| 70 try { | |
| 71 onconnect({ports: [port]}); | |
| 72 } catch(e) { | |
| 73 // we have a bad worker and cannot continue, we need to signal | |
| 74 // an error | |
| 75 port._postControlMessage("port-connection-error", JSON.stringify(e.toString())); | |
| 76 throw e; | |
| 77 } | |
| 78 break; | |
| 79 | |
| 80 case "port-close": | |
| 81 // the client side of the port was closed, so close this side too. | |
| 82 port = ports[portid]; | |
| 83 if (!port) { | |
| 84 // port already closed (which will happen when we call port.close() | |
| 85 // below - the client side will send us this message but we've | |
| 86 // already closed it.) | |
| 87 return; | |
| 88 } | |
| 89 delete ports[portid]; | |
| 90 port.close(); | |
| 91 break; | |
| 92 | |
| 93 case "port-message": | |
| 94 // the client posted a message to this worker port. | |
| 95 port = ports[portid]; | |
| 96 if (!port) { | |
| 97 // port must be closed - this shouldn't happen! | |
| 98 return; | |
| 99 } | |
| 100 port._onmessage(data.data); | |
| 101 break; | |
| 102 | |
| 103 default: | |
| 104 break; | |
| 105 } | |
| 106 } | |
| 107 // addEventListener is injected into the sandbox. | |
| 108 _addEventListener('message', messageHandler); | |
| 109 } | |
| 110 __initWorkerMessageHandler(); |
