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/**
* https://github.com/csnover/TraceKit
* @license MIT
* @namespace TraceKit
*/
(function(window, undefined) {
if (!window) {
return;
}
var TraceKit = {};
var _oldTraceKit = window.TraceKit;
// global reference to slice
var _slice = [].slice;
var UNKNOWN_FUNCTION = '?';
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error#Error_types
var ERROR_TYPES_RE = /^(?:[Uu]ncaught (?:exception: )?)?(?:((?:Eval|Internal|Range|Reference|Syntax|Type|URI|)Error): )?(.*)$/;
/**
* A better form of hasOwnProperty<br/>
* Example: `_has(MainHostObject, property) === true/false`
*
* @param {Object} object to check property
* @param {string} key to check
* @return {Boolean} true if the object has the key and it is not inherited
*/
function _has(object, key) {
return Object.prototype.hasOwnProperty.call(object, key);
}
/**
* Returns true if the parameter is undefined<br/>
* Example: `_isUndefined(val) === true/false`
*
* @param {*} what Value to check
* @return {Boolean} true if undefined and false otherwise
*/
function _isUndefined(what) {
return typeof what === 'undefined';
}
/**
* Export TraceKit out to another variable<br/>
* Example: `var TK = TraceKit.noConflict()`
* @return {Object} The TraceKit object
* @memberof TraceKit
*/
TraceKit.noConflict = function noConflict() {
window.TraceKit = _oldTraceKit;
return TraceKit;
};
/**
* Wrap any function in a TraceKit reporter<br/>
* Example: `func = TraceKit.wrap(func);`
*
* @param {Function} func Function to be wrapped
* @return {Function} The wrapped func
* @memberof TraceKit
*/
TraceKit.wrap = function traceKitWrapper(func) {
function wrapped() {
try {
return func.apply(this, arguments);
} catch (e) {
TraceKit.report(e);
throw e;
}
}
return wrapped;
};
/**
* Cross-browser processing of unhandled exceptions
*
* Syntax:
* ```js
* TraceKit.report.subscribe(function(stackInfo) { ... })
* TraceKit.report.unsubscribe(function(stackInfo) { ... })
* TraceKit.report(exception)
* try { ...code... } catch(ex) { TraceKit.report(ex); }
* ```
*
* Supports:
* - Firefox: full stack trace with line numbers, plus column number
* on top frame; column number is not guaranteed
* - Opera: full stack trace with line and column numbers
* - Chrome: full stack trace with line and column numbers
* - Safari: line and column number for the top frame only; some frames
* may be missing, and column number is not guaranteed
* - IE: line and column number for the top frame only; some frames
* may be missing, and column number is not guaranteed
*
* In theory, TraceKit should work on all of the following versions:
* - IE5.5+ (only 8.0 tested)
* - Firefox 0.9+ (only 3.5+ tested)
* - Opera 7+ (only 10.50 tested; versions 9 and earlier may require
* Exceptions Have Stacktrace to be enabled in opera:config)
* - Safari 3+ (only 4+ tested)
* - Chrome 1+ (only 5+ tested)
* - Konqueror 3.5+ (untested)
*
* Requires TraceKit.computeStackTrace.
*
* Tries to catch all unhandled exceptions and report them to the
* subscribed handlers. Please note that TraceKit.report will rethrow the
* exception. This is REQUIRED in order to get a useful stack trace in IE.
* If the exception does not reach the top of the browser, you will only
* get a stack trace from the point where TraceKit.report was called.
*
* Handlers receive a TraceKit.StackTrace object as described in the
* TraceKit.computeStackTrace docs.
*
* @memberof TraceKit
* @namespace
*/
TraceKit.report = (function reportModuleWrapper() {
var handlers = [],
lastException = null,
lastExceptionStack = null;
/**
* Add a crash handler.
* @param {Function} handler
* @memberof TraceKit.report
*/
function subscribe(handler) {
installGlobalHandler();
installGlobalUnhandledRejectionHandler();
handlers.push(handler);
}
/**
* Remove a crash handler.
* @param {Function} handler
* @memberof TraceKit.report
*/
function unsubscribe(handler) {
for (var i = handlers.length - 1; i >= 0; --i) {
if (handlers[i] === handler) {
handlers.splice(i, 1);
}
}
if (handlers.length === 0) {
uninstallGlobalHandler();
uninstallGlobalUnhandledRejectionHandler();
}
}
/**
* Dispatch stack information to all handlers.
* @param {TraceKit.StackTrace} stack
* @param {boolean} isWindowError Is this a top-level window error?
* @param {Error=} error The error that's being handled (if available, null otherwise)
* @memberof TraceKit.report
* @throws An exception if an error occurs while calling an handler.
*/
function notifyHandlers(stack, isWindowError, error) {
var exception = null;
if (isWindowError && !TraceKit.collectWindowErrors) {
return;
}
for (var i in handlers) {
if (_has(handlers, i)) {
try {
handlers[i](stack, isWindowError, error);
} catch (inner) {
exception = inner;
}
}
}
if (exception) {
throw exception;
}
}
var _oldOnerrorHandler, _onErrorHandlerInstalled;
var _oldOnunhandledrejectionHandler, _onUnhandledRejectionHandlerInstalled;
/**
* Ensures all global unhandled exceptions are recorded.
* Supported by Gecko and IE.
* @param {string} message Error message.
* @param {string} url URL of script that generated the exception.
* @param {(number|string)} lineNo The line number at which the error occurred.
* @param {(number|string)=} columnNo The column number at which the error occurred.
* @param {Error=} errorObj The actual Error object.
* @memberof TraceKit.report
*/
function traceKitWindowOnError(message, url, lineNo, columnNo, errorObj) {
var stack = null;
if (lastExceptionStack) {
TraceKit.computeStackTrace.augmentStackTraceWithInitialElement(lastExceptionStack, url, lineNo, message);
processLastException();
} else if (errorObj) {
stack = TraceKit.computeStackTrace(errorObj);
notifyHandlers(stack, true, errorObj);
} else {
var location = {
'url': url,
'line': lineNo,
'column': columnNo
};
var name;
var msg = message; // must be new var or will modify original `arguments`
if ({}.toString.call(message) === '[object String]') {
var groups = message.match(ERROR_TYPES_RE);
if (groups) {
name = groups[1];
msg = groups[2];
}
}
location.func = TraceKit.computeStackTrace.guessFunctionName(location.url, location.line);
location.context = TraceKit.computeStackTrace.gatherContext(location.url, location.line);
stack = {
'name': name,
'message': msg,
'mode': 'onerror',
'stack': [location]
};
notifyHandlers(stack, true, null);
}
if (_oldOnerrorHandler) {
return _oldOnerrorHandler.apply(this, arguments);
}
return false;
}
/**
* Ensures all unhandled rejections are recorded.
* @param {PromiseRejectionEvent} e event.
* @memberof TraceKit.report
* @see https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onunhandledrejection
* @see https://developer.mozilla.org/en-US/docs/Web/API/PromiseRejectionEvent
*/
function traceKitWindowOnUnhandledRejection(e) {
var stack = TraceKit.computeStackTrace(e.reason);
notifyHandlers(stack, true, e.reason);
}
/**
* Install a global onerror handler
* @memberof TraceKit.report
*/
function installGlobalHandler() {
if (_onErrorHandlerInstalled === true) {
return;
}
_oldOnerrorHandler = window.onerror;
window.onerror = traceKitWindowOnError;
_onErrorHandlerInstalled = true;
}
/**
* Uninstall the global onerror handler
* @memberof TraceKit.report
*/
function uninstallGlobalHandler() {
if (_onErrorHandlerInstalled) {
window.onerror = _oldOnerrorHandler;
_onErrorHandlerInstalled = false;
}
}
/**
* Install a global onunhandledrejection handler
* @memberof TraceKit.report
*/
function installGlobalUnhandledRejectionHandler() {
if (_onUnhandledRejectionHandlerInstalled === true) {
return;
}
_oldOnunhandledrejectionHandler = window.onunhandledrejection;
window.onunhandledrejection = traceKitWindowOnUnhandledRejection;
_onUnhandledRejectionHandlerInstalled = true;
}
/**
* Uninstall the global onunhandledrejection handler
* @memberof TraceKit.report
*/
function uninstallGlobalUnhandledRejectionHandler() {
if (_onUnhandledRejectionHandlerInstalled) {
window.onunhandledrejection = _oldOnunhandledrejectionHandler;
_onUnhandledRejectionHandlerInstalled = false;
}
}
/**
* Process the most recent exception
* @memberof TraceKit.report
*/
function processLastException() {
var _lastExceptionStack = lastExceptionStack,
_lastException = lastException;
lastExceptionStack = null;
lastException = null;
notifyHandlers(_lastExceptionStack, false, _lastException);
}
/**
* Reports an unhandled Error to TraceKit.
* @param {Error} ex
* @memberof TraceKit.report
* @throws An exception if an incomplete stack trace is detected (old IE browsers).
*/
function report(ex) {
if (lastExceptionStack) {
if (lastException === ex) {
return; // already caught by an inner catch block, ignore
} else {
processLastException();
}
}
var stack = TraceKit.computeStackTrace(ex);
lastExceptionStack = stack;
lastException = ex;
// If the stack trace is incomplete, wait for 2 seconds for
// slow slow IE to see if onerror occurs or not before reporting
// this exception; otherwise, we will end up with an incomplete
// stack trace
setTimeout(function () {
if (lastException === ex) {
processLastException();
}
}, (stack.incomplete ? 2000 : 0));
throw ex; // re-throw to propagate to the top level (and cause window.onerror)
}
report.subscribe = subscribe;
report.unsubscribe = unsubscribe;
return report;
}());
/**
* An object representing a single stack frame.
* @typedef {Object} StackFrame
* @property {string} url The JavaScript or HTML file URL.
* @property {string} func The function name, or empty for anonymous functions (if guessing did not work).
* @property {string[]?} args The arguments passed to the function, if known.
* @property {number=} line The line number, if known.
* @property {number=} column The column number, if known.
* @property {string[]} context An array of source code lines; the middle element corresponds to the correct line#.
* @memberof TraceKit
*/
/**
* An object representing a JavaScript stack trace.
* @typedef {Object} StackTrace
* @property {string} name The name of the thrown exception.
* @property {string} message The exception error message.
* @property {TraceKit.StackFrame[]} stack An array of stack frames.
* @property {string} mode 'stack', 'stacktrace', 'multiline', 'callers', 'onerror', or 'failed' -- method used to collect the stack trace.
* @memberof TraceKit
*/
/**
* TraceKit.computeStackTrace: cross-browser stack traces in JavaScript
*
* Syntax:
* ```js
* s = TraceKit.computeStackTrace.ofCaller([depth])
* s = TraceKit.computeStackTrace(exception) // consider using TraceKit.report instead (see below)
* ```
*
* Supports:
* - Firefox: full stack trace with line numbers and unreliable column
* number on top frame
* - Opera 10: full stack trace with line and column numbers
* - Opera 9-: full stack trace with line numbers
* - Chrome: full stack trace with line and column numbers
* - Safari: line and column number for the topmost stacktrace element
* only
* - IE: no line numbers whatsoever
*
* Tries to guess names of anonymous functions by looking for assignments
* in the source code. In IE and Safari, we have to guess source file names
* by searching for function bodies inside all page scripts. This will not
* work for scripts that are loaded cross-domain.
* Here be dragons: some function names may be guessed incorrectly, and
* duplicate functions may be mismatched.
*
* TraceKit.computeStackTrace should only be used for tracing purposes.
* Logging of unhandled exceptions should be done with TraceKit.report,
* which builds on top of TraceKit.computeStackTrace and provides better
* IE support by utilizing the window.onerror event to retrieve information
* about the top of the stack.
*
* Note: In IE and Safari, no stack trace is recorded on the Error object,
* so computeStackTrace instead walks its *own* chain of callers.
* This means that:
* * in Safari, some methods may be missing from the stack trace;
* * in IE, the topmost function in the stack trace will always be the
* caller of computeStackTrace.
*
* This is okay for tracing (because you are likely to be calling
* computeStackTrace from the function you want to be the topmost element
* of the stack trace anyway), but not okay for logging unhandled
* exceptions (because your catch block will likely be far away from the
* inner function that actually caused the exception).
*
* Tracing example:
* ```js
* function trace(message) {
* var stackInfo = TraceKit.computeStackTrace.ofCaller();
* var data = message + "\n";
* for(var i in stackInfo.stack) {
* var item = stackInfo.stack[i];
* data += (item.func || '[anonymous]') + "() in " + item.url + ":" + (item.line || '0') + "\n";
* }
* if (window.console)
* console.info(data);
* else
* alert(data);
* }
* ```
* @memberof TraceKit
* @namespace
*/
TraceKit.computeStackTrace = (function computeStackTraceWrapper() {
var debug = false,
sourceCache = {};
/**
* Attempts to retrieve source code via XMLHttpRequest, which is used
* to look up anonymous function names.
* @param {string} url URL of source code.
* @return {string} Source contents.
* @memberof TraceKit.computeStackTrace
*/
function loadSource(url) {
if (!TraceKit.remoteFetching) { //Only attempt request if remoteFetching is on.
return '';
}
try {
var getXHR = function() {
try {
return new window.XMLHttpRequest();
} catch (e) {
// explicitly bubble up the exception if not found
return new window.ActiveXObject('Microsoft.XMLHTTP');
}
};
var request = getXHR();
request.open('GET', url, false);
request.send('');
return request.responseText;
} catch (e) {
return '';
}
}
/**
* Retrieves source code from the source code cache.
* @param {string} url URL of source code.
* @return {Array.<string>} Source contents.
* @memberof TraceKit.computeStackTrace
*/
function getSource(url) {
if (typeof url !== 'string') {
return [];
}
if (!_has(sourceCache, url)) {
// URL needs to be able to fetched within the acceptable domain. Otherwise,
// cross-domain errors will be triggered.
/*
Regex matches:
0 - Full Url
1 - Protocol
2 - Domain
3 - Port (Useful for internal applications)
4 - Path
*/
var source = '';
var domain = '';
try { domain = window.document.domain; } catch (e) { }
var match = /(.*)\:\/\/([^:\/]+)([:\d]*)\/{0,1}([\s\S]*)/.exec(url);
if (match && match[2] === domain) {
source = loadSource(url);
}
sourceCache[url] = source ? source.split('\n') : [];
}
return sourceCache[url];
}
/**
* Tries to use an externally loaded copy of source code to determine
* the name of a function by looking at the name of the variable it was
* assigned to, if any.
* @param {string} url URL of source code.
* @param {(string|number)} lineNo Line number in source code.
* @return {string} The function name, if discoverable.
* @memberof TraceKit.computeStackTrace
*/
function guessFunctionName(url, lineNo) {
var reFunctionArgNames = /function ([^(]*)\(([^)]*)\)/,
reGuessFunction = /['"]?([0-9A-Za-z$_]+)['"]?\s*[:=]\s*(function|eval|new Function)/,
line = '',
maxLines = 10,
source = getSource(url),
m;
if (!source.length) {
return UNKNOWN_FUNCTION;
}
// Walk backwards from the first line in the function until we find the line which
// matches the pattern above, which is the function definition
for (var i = 0; i < maxLines; ++i) {
line = source[lineNo - i] + line;
if (!_isUndefined(line)) {
if ((m = reGuessFunction.exec(line))) {
return m[1];
} else if ((m = reFunctionArgNames.exec(line))) {
return m[1];
}
}
}
return UNKNOWN_FUNCTION;
}
/**
* Retrieves the surrounding lines from where an exception occurred.
* @param {string} url URL of source code.
* @param {(string|number)} line Line number in source code to center around for context.
* @return {?Array.<string>} Lines of source code.
* @memberof TraceKit.computeStackTrace
*/
function gatherContext(url, line) {
var source = getSource(url);
if (!source.length) {
return null;
}
var context = [],
// linesBefore & linesAfter are inclusive with the offending line.
// if linesOfContext is even, there will be one extra line
// *before* the offending line.
linesBefore = Math.floor(TraceKit.linesOfContext / 2),
// Add one extra line if linesOfContext is odd
linesAfter = linesBefore + (TraceKit.linesOfContext % 2),
start = Math.max(0, line - linesBefore - 1),
end = Math.min(source.length, line + linesAfter - 1);
line -= 1; // convert to 0-based index
for (var i = start; i < end; ++i) {
if (!_isUndefined(source[i])) {
context.push(source[i]);
}
}
return context.length > 0 ? context : null;
}
/**
* Escapes special characters, except for whitespace, in a string to be
* used inside a regular expression as a string literal.
* @param {string} text The string.
* @return {string} The escaped string literal.
* @memberof TraceKit.computeStackTrace
*/
function escapeRegExp(text) {
return text.replace(/[\-\[\]{}()*+?.,\\\^$|#]/g, '\\$&');
}
/**
* Escapes special characters in a string to be used inside a regular
* expression as a string literal. Also ensures that HTML entities will
* be matched the same as their literal friends.
* @param {string} body The string.
* @return {string} The escaped string.
* @memberof TraceKit.computeStackTrace
*/
function escapeCodeAsRegExpForMatchingInsideHTML(body) {
return escapeRegExp(body).replace('<', '(?:<|<)').replace('>', '(?:>|>)').replace('&', '(?:&|&)').replace('"', '(?:"|")').replace(/\s+/g, '\\s+');
}
/**
* Determines where a code fragment occurs in the source code.
* @param {RegExp} re The function definition.
* @param {Array.<string>} urls A list of URLs to search.
* @return {?Object.<string, (string|number)>} An object containing
* the url, line, and column number of the defined function.
* @memberof TraceKit.computeStackTrace
*/
function findSourceInUrls(re, urls) {
var source, m;
for (var i = 0, j = urls.length; i < j; ++i) {
if ((source = getSource(urls[i])).length) {
source = source.join('\n');
if ((m = re.exec(source))) {
return {
'url': urls[i],
'line': source.substring(0, m.index).split('\n').length,
'column': m.index - source.lastIndexOf('\n', m.index) - 1
};
}
}
}
return null;
}
/**
* Determines at which column a code fragment occurs on a line of the
* source code.
* @param {string} fragment The code fragment.
* @param {string} url The URL to search.
* @param {(string|number)} line The line number to examine.
* @return {?number} The column number.
* @memberof TraceKit.computeStackTrace
*/
function findSourceInLine(fragment, url, line) {
var source = getSource(url),
re = new RegExp('\\b' + escapeRegExp(fragment) + '\\b'),
m;
line -= 1;
if (source && source.length > line && (m = re.exec(source[line]))) {
return m.index;
}
return null;
}
/**
* Determines where a function was defined within the source code.
* @param {(Function|string)} func A function reference or serialized
* function definition.
* @return {?Object.<string, (string|number)>} An object containing
* the url, line, and column number of the defined function.
* @memberof TraceKit.computeStackTrace
*/
function findSourceByFunctionBody(func) {
if (_isUndefined(window && window.document)) {
return;
}
var urls = [window.location.href],
scripts = window.document.getElementsByTagName('script'),
body,
code = '' + func,
codeRE = /^function(?:\s+([\w$]+))?\s*\(([\w\s,]*)\)\s*\{\s*(\S[\s\S]*\S)\s*\}\s*$/,
eventRE = /^function on([\w$]+)\s*\(event\)\s*\{\s*(\S[\s\S]*\S)\s*\}\s*$/,
re,
parts,
result;
for (var i = 0; i < scripts.length; ++i) {
var script = scripts[i];
if (script.src) {
urls.push(script.src);
}
}
if (!(parts = codeRE.exec(code))) {
re = new RegExp(escapeRegExp(code).replace(/\s+/g, '\\s+'));
}
// not sure if this is really necessary, but I don’t have a test
// corpus large enough to confirm that and it was in the original.
else {
var name = parts[1] ? '\\s+' + parts[1] : '',
args = parts[2].split(',').join('\\s*,\\s*');
body = escapeRegExp(parts[3]).replace(/;$/, ';?'); // semicolon is inserted if the function ends with a comment.replace(/\s+/g, '\\s+');
re = new RegExp('function' + name + '\\s*\\(\\s*' + args + '\\s*\\)\\s*{\\s*' + body + '\\s*}');
}
// look for a normal function definition
if ((result = findSourceInUrls(re, urls))) {
return result;
}
// look for an old-school event handler function
if ((parts = eventRE.exec(code))) {
var event = parts[1];
body = escapeCodeAsRegExpForMatchingInsideHTML(parts[2]);
// look for a function defined in HTML as an onXXX handler
re = new RegExp('on' + event + '=[\\\'"]\\s*' + body + '\\s*[\\\'"]', 'i');
if ((result = findSourceInUrls(re, urls[0]))) {
return result;
}
// look for ???
re = new RegExp(body);
if ((result = findSourceInUrls(re, urls))) {
return result;
}
}
return null;
}
// Contents of Exception in various browsers.
//
// SAFARI:
// ex.message = Can't find variable: qq
// ex.line = 59
// ex.sourceId = 580238192
// ex.sourceURL = http://...
// ex.expressionBeginOffset = 96
// ex.expressionCaretOffset = 98
// ex.expressionEndOffset = 98
// ex.name = ReferenceError
//
// FIREFOX:
// ex.message = qq is not defined
// ex.fileName = http://...
// ex.lineNumber = 59
// ex.columnNumber = 69
// ex.stack = ...stack trace... (see the example below)
// ex.name = ReferenceError
//
// CHROME:
// ex.message = qq is not defined
// ex.name = ReferenceError
// ex.type = not_defined
// ex.arguments = ['aa']
// ex.stack = ...stack trace...
//
// INTERNET EXPLORER:
// ex.message = ...
// ex.name = ReferenceError
//
// OPERA:
// ex.message = ...message... (see the example below)
// ex.name = ReferenceError
// ex.opera#sourceloc = 11 (pretty much useless, duplicates the info in ex.message)
// ex.stacktrace = n/a; see 'opera:config#UserPrefs|Exceptions Have Stacktrace'
/**
* Computes stack trace information from the stack property.
* Chrome and Gecko use this property.
* @param {Error} ex
* @return {?TraceKit.StackTrace} Stack trace information.
* @memberof TraceKit.computeStackTrace
*/
function computeStackTraceFromStackProp(ex) {
if (!ex.stack) {
return null;
}
var chrome = /^\s*at (.*?) ?\(((?:file|https?|blob|chrome-extension|native|eval|webpack|<anonymous>|\/).*?)(?::(\d+))?(?::(\d+))?\)?\s*$/i,
gecko = /^\s*(.*?)(?:\((.*?)\))?(?:^|@)((?:file|https?|blob|chrome|webpack|resource|\[native).*?|[^@]*bundle)(?::(\d+))?(?::(\d+))?\s*$/i,
winjs = /^\s*at (?:((?:\[object object\])?.+) )?\(?((?:file|ms-appx|https?|webpack|blob):.*?):(\d+)(?::(\d+))?\)?\s*$/i,
// Used to additionally parse URL/line/column from eval frames
isEval,
geckoEval = /(\S+) line (\d+)(?: > eval line \d+)* > eval/i,
chromeEval = /\((\S*)(?::(\d+))(?::(\d+))\)/,
lines = ex.stack.split('\n'),
stack = [],
submatch,
parts,
element,
reference = /^(.*) is undefined$/.exec(ex.message);
for (var i = 0, j = lines.length; i < j; ++i) {
if ((parts = chrome.exec(lines[i]))) {
var isNative = parts[2] && parts[2].indexOf('native') === 0; // start of line
isEval = parts[2] && parts[2].indexOf('eval') === 0; // start of line
if (isEval && (submatch = chromeEval.exec(parts[2]))) {
// throw out eval line/column and use top-most line/column number
parts[2] = submatch[1]; // url
parts[3] = submatch[2]; // line
parts[4] = submatch[3]; // column
}
element = {
'url': !isNative ? parts[2] : null,
'func': parts[1] || UNKNOWN_FUNCTION,
'args': isNative ? [parts[2]] : [],
'line': parts[3] ? +parts[3] : null,
'column': parts[4] ? +parts[4] : null
};
} else if ( parts = winjs.exec(lines[i]) ) {
element = {
'url': parts[2],
'func': parts[1] || UNKNOWN_FUNCTION,
'args': [],
'line': +parts[3],
'column': parts[4] ? +parts[4] : null
};
} else if ((parts = gecko.exec(lines[i]))) {
isEval = parts[3] && parts[3].indexOf(' > eval') > -1;
if (isEval && (submatch = geckoEval.exec(parts[3]))) {
// throw out eval line/column and use top-most line number
parts[3] = submatch[1];
parts[4] = submatch[2];
parts[5] = null; // no column when eval
} else if (i === 0 && !parts[5] && !_isUndefined(ex.columnNumber)) {
// FireFox uses this awesome columnNumber property for its top frame
// Also note, Firefox's column number is 0-based and everything else expects 1-based,
// so adding 1
// NOTE: this hack doesn't work if top-most frame is eval
stack[0].column = ex.columnNumber + 1;
}
element = {
'url': parts[3],
'func': parts[1] || UNKNOWN_FUNCTION,
'args': parts[2] ? parts[2].split(',') : [],
'line': parts[4] ? +parts[4] : null,
'column': parts[5] ? +parts[5] : null
};
} else {
continue;
}
if (!element.func && element.line) {
element.func = guessFunctionName(element.url, element.line);
}
element.context = element.line ? gatherContext(element.url, element.line) : null;
stack.push(element);
}
if (!stack.length) {
return null;
}
if (stack[0] && stack[0].line && !stack[0].column && reference) {
stack[0].column = findSourceInLine(reference[1], stack[0].url, stack[0].line);
}
return {
'mode': 'stack',
'name': ex.name,
'message': ex.message,
'stack': stack
};
}
/**
* Computes stack trace information from the stacktrace property.
* Opera 10+ uses this property.
* @param {Error} ex
* @return {?TraceKit.StackTrace} Stack trace information.
* @memberof TraceKit.computeStackTrace
*/
function computeStackTraceFromStacktraceProp(ex) {
// Access and store the stacktrace property before doing ANYTHING
// else to it because Opera is not very good at providing it
// reliably in other circumstances.
var stacktrace = ex.stacktrace;
if (!stacktrace) {
return;
}
var opera10Regex = / line (\d+).*script (?:in )?(\S+)(?:: in function (\S+))?$/i,
opera11Regex = / line (\d+), column (\d+)\s*(?:in (?:<anonymous function: ([^>]+)>|([^\)]+))\((.*)\))? in (.*):\s*$/i,
lines = stacktrace.split('\n'),
stack = [],
parts;
for (var line = 0; line < lines.length; line += 2) {
var element = null;
if ((parts = opera10Regex.exec(lines[line]))) {
element = {
'url': parts[2],
'line': +parts[1],
'column': null,
'func': parts[3],
'args':[]
};
} else if ((parts = opera11Regex.exec(lines[line]))) {
element = {
'url': parts[6],
'line': +parts[1],
'column': +parts[2],
'func': parts[3] || parts[4],
'args': parts[5] ? parts[5].split(',') : []
};
}
if (element) {
if (!element.func && element.line) {
element.func = guessFunctionName(element.url, element.line);
}
if (element.line) {
try {
element.context = gatherContext(element.url, element.line);
} catch (exc) {}
}
if (!element.context) {
element.context = [lines[line + 1]];
}
stack.push(element);
}
}
if (!stack.length) {
return null;
}
return {
'mode': 'stacktrace',
'name': ex.name,
'message': ex.message,
'stack': stack
};
}
/**
* NOT TESTED.
* Computes stack trace information from an error message that includes
* the stack trace.
* Opera 9 and earlier use this method if the option to show stack
* traces is turned on in opera:config.
* @param {Error} ex
* @return {?TraceKit.StackTrace} Stack information.
* @memberof TraceKit.computeStackTrace
*/
function computeStackTraceFromOperaMultiLineMessage(ex) {
// TODO: Clean this function up
// Opera includes a stack trace into the exception message. An example is:
//
// Statement on line 3: Undefined variable: undefinedFunc
// Backtrace:
// Line 3 of linked script file://localhost/Users/andreyvit/Projects/TraceKit/javascript-client/sample.js: In function zzz
// undefinedFunc(a);
// Line 7 of inline#1 script in file://localhost/Users/andreyvit/Projects/TraceKit/javascript-client/sample.html: In function yyy
// zzz(x, y, z);
// Line 3 of inline#1 script in file://localhost/Users/andreyvit/Projects/TraceKit/javascript-client/sample.html: In function xxx
// yyy(a, a, a);
// Line 1 of function script
// try { xxx('hi'); return false; } catch(ex) { TraceKit.report(ex); }
// ...
var lines = ex.message.split('\n');
if (lines.length < 4) {
return null;
}
var lineRE1 = /^\s*Line (\d+) of linked script ((?:file|https?|blob)\S+)(?:: in function (\S+))?\s*$/i,
lineRE2 = /^\s*Line (\d+) of inline#(\d+) script in ((?:file|https?|blob)\S+)(?:: in function (\S+))?\s*$/i,
lineRE3 = /^\s*Line (\d+) of function script\s*$/i,
stack = [],
scripts = (window && window.document && window.document.getElementsByTagName('script')),
inlineScriptBlocks = [],
parts;
for (var s in scripts) {
if (_has(scripts, s) && !scripts[s].src) {
inlineScriptBlocks.push(scripts[s]);
}
}
for (var line = 2; line < lines.length; line += 2) {
var item = null;
if ((parts = lineRE1.exec(lines[line]))) {
item = {
'url': parts[2],
'func': parts[3],
'args': [],
'line': +parts[1],
'column': null
};
} else if ((parts = lineRE2.exec(lines[line]))) {
item = {
'url': parts[3],
'func': parts[4],
'args': [],
'line': +parts[1],
'column': null // TODO: Check to see if inline#1 (+parts[2]) points to the script number or column number.
};
var relativeLine = (+parts[1]); // relative to the start of the <SCRIPT> block
var script = inlineScriptBlocks[parts[2] - 1];
if (script) {
var source = getSource(item.url);
if (source) {
source = source.join('\n');
var pos = source.indexOf(script.innerText);
if (pos >= 0) {
item.line = relativeLine + source.substring(0, pos).split('\n').length;
}
}
}
} else if ((parts = lineRE3.exec(lines[line]))) {
var url = window.location.href.replace(/#.*$/, '');
var re = new RegExp(escapeCodeAsRegExpForMatchingInsideHTML(lines[line + 1]));
var src = findSourceInUrls(re, [url]);
item = {
'url': url,
'func': '',
'args': [],
'line': src ? src.line : parts[1],
'column': null
};
}
if (item) {
if (!item.func) {
item.func = guessFunctionName(item.url, item.line);
}
var context = gatherContext(item.url, item.line);
var midline = (context ? context[Math.floor(context.length / 2)] : null);
if (context && midline.replace(/^\s*/, '') === lines[line + 1].replace(/^\s*/, '')) {
item.context = context;
} else {
// if (context) alert("Context mismatch. Correct midline:\n" + lines[i+1] + "\n\nMidline:\n" + midline + "\n\nContext:\n" + context.join("\n") + "\n\nURL:\n" + item.url);
item.context = [lines[line + 1]];
}
stack.push(item);
}
}
if (!stack.length) {
return null; // could not parse multiline exception message as Opera stack trace
}
return {
'mode': 'multiline',
'name': ex.name,
'message': lines[0],
'stack': stack
};
}
/**
* Adds information about the first frame to incomplete stack traces.
* Safari and IE require this to get complete data on the first frame.
* @param {TraceKit.StackTrace} stackInfo Stack trace information from
* one of the compute* methods.
* @param {string} url The URL of the script that caused an error.
* @param {(number|string)} lineNo The line number of the script that
* caused an error.
* @param {string=} message The error generated by the browser, which
* hopefully contains the name of the object that caused the error.
* @return {boolean} Whether or not the stack information was
* augmented.
* @memberof TraceKit.computeStackTrace
*/
function augmentStackTraceWithInitialElement(stackInfo, url, lineNo, message) {
var initial = {
'url': url,
'line': lineNo
};
if (initial.url && initial.line) {
stackInfo.incomplete = false;
if (!initial.func) {
initial.func = guessFunctionName(initial.url, initial.line);
}
if (!initial.context) {
initial.context = gatherContext(initial.url, initial.line);
}
var reference = / '([^']+)' /.exec(message);
if (reference) {
initial.column = findSourceInLine(reference[1], initial.url, initial.line);
}
if (stackInfo.stack.length > 0) {
if (stackInfo.stack[0].url === initial.url) {
if (stackInfo.stack[0].line === initial.line) {
return false; // already in stack trace
} else if (!stackInfo.stack[0].line && stackInfo.stack[0].func === initial.func) {
stackInfo.stack[0].line = initial.line;
stackInfo.stack[0].context = initial.context;
return false;
}
}
}
stackInfo.stack.unshift(initial);
stackInfo.partial = true;
return true;
} else {
stackInfo.incomplete = true;
}
return false;
}
/**
* Computes stack trace information by walking the arguments.caller
* chain at the time the exception occurred. This will cause earlier
* frames to be missed but is the only way to get any stack trace in
* Safari and IE. The top frame is restored by
* {@link augmentStackTraceWithInitialElement}.
* @param {Error} ex
* @return {TraceKit.StackTrace=} Stack trace information.
* @memberof TraceKit.computeStackTrace
*/
function computeStackTraceByWalkingCallerChain(ex, depth) {
var functionName = /function\s+([_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*)?\s*\(/i,
stack = [],
funcs = {},
recursion = false,
parts,
item,
source;
for (var curr = computeStackTraceByWalkingCallerChain.caller; curr && !recursion; curr = curr.caller) {
if (curr === computeStackTrace || curr === TraceKit.report) {
continue;
}
item = {
'url': null,
'func': UNKNOWN_FUNCTION,
'args': [],
'line': null,
'column': null
};
if (curr.name) {
item.func = curr.name;
} else if ((parts = functionName.exec(curr.toString()))) {
item.func = parts[1];
}
if (typeof item.func === 'undefined') {
try {
item.func = parts.input.substring(0, parts.input.indexOf('{'));
} catch (e) { }
}
if ((source = findSourceByFunctionBody(curr))) {
item.url = source.url;
item.line = source.line;
if (item.func === UNKNOWN_FUNCTION) {
item.func = guessFunctionName(item.url, item.line);
}
var reference = / '([^']+)' /.exec(ex.message || ex.description);
if (reference) {
item.column = findSourceInLine(reference[1], source.url, source.line);
}
}
if (funcs['' + curr]) {
recursion = true;
}else{
funcs['' + curr] = true;
}
stack.push(item);
}
if (depth) {
stack.splice(0, depth);
}
var result = {
'mode': 'callers',
'name': ex.name,
'message': ex.message,
'stack': stack
};
augmentStackTraceWithInitialElement(result, ex.sourceURL || ex.fileName, ex.line || ex.lineNumber, ex.message || ex.description);
return result;
}
/**
* Computes a stack trace for an exception.
* @param {Error} ex
* @param {(string|number)=} depth
* @memberof TraceKit.computeStackTrace
*/
function computeStackTrace(ex, depth) {
var stack = null;
depth = (depth == null ? 0 : +depth);
try {
// This must be tried first because Opera 10 *destroys*
// its stacktrace property if you try to access the stack
// property first!!
stack = computeStackTraceFromStacktraceProp(ex);
if (stack) {
return stack;
}
} catch (e) {
if (debug) {
throw e;
}
}
try {
stack = computeStackTraceFromStackProp(ex);
if (stack) {
return stack;
}
} catch (e) {
if (debug) {
throw e;
}
}
try {
stack = computeStackTraceFromOperaMultiLineMessage(ex);
if (stack) {
return stack;
}
} catch (e) {
if (debug) {
throw e;
}
}
try {
stack = computeStackTraceByWalkingCallerChain(ex, depth + 1);
if (stack) {
return stack;
}
} catch (e) {
if (debug) {
throw e;
}
}
return {
'name': ex.name,
'message': ex.message,
'mode': 'failed'
};
}
/**
* Logs a stacktrace starting from the previous call and working down.
* @param {(number|string)=} depth How many frames deep to trace.
* @return {TraceKit.StackTrace} Stack trace information.
* @memberof TraceKit.computeStackTrace
*/
function computeStackTraceOfCaller(depth) {
depth = (depth == null ? 0 : +depth) + 1; // "+ 1" because "ofCaller" should drop one frame
try {
throw new Error();
} catch (ex) {
return computeStackTrace(ex, depth + 1);
}
}
computeStackTrace.augmentStackTraceWithInitialElement = augmentStackTraceWithInitialElement;
computeStackTrace.computeStackTraceFromStackProp = computeStackTraceFromStackProp;
computeStackTrace.guessFunctionName = guessFunctionName;
computeStackTrace.gatherContext = gatherContext;
computeStackTrace.ofCaller = computeStackTraceOfCaller;
computeStackTrace.getSource = getSource;
return computeStackTrace;
}());
/**
* Extends support for global error handling for asynchronous browser
* functions. Adopted from Closure Library's errorhandler.js
* @memberof TraceKit
*/
TraceKit.extendToAsynchronousCallbacks = function () {
var _helper = function _helper(fnName) {
var originalFn = window[fnName];
window[fnName] = function traceKitAsyncExtension() {
// Make a copy of the arguments
var args = _slice.call(arguments);
var originalCallback = args[0];
if (typeof (originalCallback) === 'function') {
args[0] = TraceKit.wrap(originalCallback);
}
// IE < 9 doesn't support .call/.apply on setInterval/setTimeout, but it
// also only supports 2 argument and doesn't care what "this" is, so we
// can just call the original function directly.
if (originalFn.apply) {
return originalFn.apply(this, args);
} else {
return originalFn(args[0], args[1]);
}
};
};
_helper('setTimeout');
_helper('setInterval');
};
//Default options:
if (!TraceKit.remoteFetching) {
TraceKit.remoteFetching = true;
}
if (!TraceKit.collectWindowErrors) {
TraceKit.collectWindowErrors = true;
}
if (!TraceKit.linesOfContext || TraceKit.linesOfContext < 1) {
// 5 lines before, the offending line, 5 lines after
TraceKit.linesOfContext = 11;
}
// UMD export
if (typeof define === 'function' && define.amd) {
define('TraceKit', [], TraceKit);
} else if (typeof module !== 'undefined' && module.exports && window.module !== module) {
module.exports = TraceKit;
} else {
window.TraceKit = TraceKit;
}
}(typeof window !== 'undefined' ? window : global));