browser/components/downloads/src/DownloadsLogger.jsm

branch
TOR_BUG_9701
changeset 15
b8a032363ba2
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-1:000000000000 0:4eb89be83d32
1 /* -*- Mode: js2; js2-basic-offset: 2; indent-tabs-mode: nil; -*- */
2 /* vim: set ft=javascript ts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
5 * You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 /**
8 * The contents of this file were copied almost entirely from
9 * toolkit/identity/LogUtils.jsm. Until we've got a more generalized logging
10 * mechanism for toolkit, I think this is going to be how we roll.
11 */
12
13 "use strict";
14
15 this.EXPORTED_SYMBOLS = ["DownloadsLogger"];
16 const PREF_DEBUG = "browser.download.debug";
17
18 const Cu = Components.utils;
19 const Ci = Components.interfaces;
20 const Cc = Components.classes;
21 const Cr = Components.results;
22
23 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
24 Cu.import("resource://gre/modules/Services.jsm");
25
26 this.DownloadsLogger = {
27 _generateLogMessage: function _generateLogMessage(args) {
28 // create a string representation of a list of arbitrary things
29 let strings = [];
30
31 for (let arg of args) {
32 if (typeof arg === 'string') {
33 strings.push(arg);
34 } else if (arg === undefined) {
35 strings.push('undefined');
36 } else if (arg === null) {
37 strings.push('null');
38 } else {
39 try {
40 strings.push(JSON.stringify(arg, null, 2));
41 } catch(err) {
42 strings.push("<<something>>");
43 }
44 }
45 };
46 return 'Downloads: ' + strings.join(' ');
47 },
48
49 /**
50 * log() - utility function to print a list of arbitrary things
51 *
52 * Enable with about:config pref browser.download.debug
53 */
54 log: function DL_log(...args) {
55 let output = this._generateLogMessage(args);
56 dump(output + "\n");
57
58 // Additionally, make the output visible in the Error Console
59 Services.console.logStringMessage(output);
60 },
61
62 /**
63 * reportError() - report an error through component utils as well as
64 * our log function
65 */
66 reportError: function DL_reportError(...aArgs) {
67 // Report the error in the browser
68 let output = this._generateLogMessage(aArgs);
69 Cu.reportError(output);
70 dump("ERROR:" + output + "\n");
71 for (let frame = Components.stack.caller; frame; frame = frame.caller) {
72 dump("\t" + frame + "\n");
73 }
74 }
75
76 };

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