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141 lines
4.5 KiB
JavaScript
141 lines
4.5 KiB
JavaScript
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Jetpack.
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*
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* The Initial Developer of the Original Code is Mozilla.
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* Portions created by the Initial Developer are Copyright (C) 2007
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Atul Varma <atul@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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// Undo the auto-parentification of URLs done in bug 418356.
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function deParentifyURL(url) {
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return url ? url.split(" -> ").slice(-1)[0] : url;
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}
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// TODO: We might want to move this function to url or some similar
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// module.
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function getLocalFile(path) {
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var ios = Cc['@mozilla.org/network/io-service;1']
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.getService(Ci.nsIIOService);
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var channel = ios.newChannel(path, null, null);
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var iStream = channel.open();
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var siStream = Cc['@mozilla.org/scriptableinputstream;1']
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.createInstance(Ci.nsIScriptableInputStream);
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siStream.init(iStream);
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var data = new String();
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data += siStream.read(-1);
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siStream.close();
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iStream.close();
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return data;
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}
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function safeGetFileLine(path, line) {
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try {
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var scheme = require("url").parse(path).scheme;
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// TODO: There should be an easier, more accurate way to figure out
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// what's the case here.
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if (!(scheme == "http" || scheme == "https"))
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return getLocalFile(path).split("\n")[line - 1];
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} catch (e) {}
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return null;
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}
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function errorStackToJSON(stack) {
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var lines = stack.split("\n");
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var frames = [];
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lines.forEach(
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function(line) {
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if (!line)
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return;
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var atIndex = line.indexOf("@");
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var colonIndex = line.lastIndexOf(":");
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var filename = deParentifyURL(line.slice(atIndex + 1, colonIndex));
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var lineNo = parseInt(line.slice(colonIndex + 1));
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var funcSig = line.slice(0, atIndex);
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var funcName = funcSig.slice(0, funcSig.indexOf("("));
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frames.unshift({filename: filename,
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funcName: funcName,
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lineNo: lineNo});
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});
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return frames;
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};
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function nsIStackFramesToJSON(frame) {
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var stack = [];
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while (frame) {
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var filename = deParentifyURL(frame.filename);
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stack.splice(0, 0, {filename: filename,
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lineNo: frame.lineNumber,
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funcName: frame.name});
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frame = frame.caller;
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}
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return stack;
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};
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var fromException = exports.fromException = function fromException(e) {
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if (e instanceof Ci.nsIException)
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return nsIStackFramesToJSON(e.location);
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return errorStackToJSON(e.stack);
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};
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var get = exports.get = function get() {
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return nsIStackFramesToJSON(Components.stack.caller);
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};
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var format = exports.format = function format(tbOrException) {
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if (tbOrException === undefined) {
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tbOrException = get();
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tbOrException.splice(-1, 1);
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}
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var tb;
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if (tbOrException.length === undefined)
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tb = fromException(tbOrException);
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else
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tb = tbOrException;
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var lines = ["Traceback (most recent call last):"];
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tb.forEach(
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function(frame) {
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lines.push(' File "' + frame.filename + '", line ' +
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frame.lineNo + ', in ' + frame.funcName);
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var sourceLine = safeGetFileLine(frame.filename, frame.lineNo);
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if (sourceLine)
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lines.push(' ' + sourceLine.trim());
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});
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return lines.join("\n");
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};
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