fdaciuk/exceptions.js

## exceptions.js
/* jslint browser: true, jquery: true, devel: true*/

/*
  Dependencies: Tumblr.Flags

  Tumblr.Utils.exceptions will automatically log window.onerror.

  DO NOT write code like this. This is written to handle weird cases
  where normal code should probably just fail.
*/

;(function(root, exports) {
  'use strict';

  // Keep local copies of globals in case they change.
  // We should also protect against prototype hijacking, but not today.
  var document = root.document;
  var encodeURIComponent = root.encodeURIComponent;
  var navigator = root.navigator;
  var parseInt = root.parseInt;
  var performance = root.performance;
  var window = root.window;
  var Date = root.Date;
  var Error = root.Error;
  var Math = root.Math;
  var XMLHttpRequest = root.XMLHttpRequest;


  // Stores
  var ephemeral = [];
  var errors = [];
  var perf = {};
  var windowDidLoad = false;

  // oldIE addEventListener shim
  function addEventListener(el, type, listener, useCapture) {
    el.addEventListener ?
      el.addEventListener(type, listener, !!useCapture) :
      el.attachEvent && el.attachEvent('on' + type, listener, !!useCapture);
  }

  // Truncate strings in the middle.
  // If an extension or a bookmarklet throws an error, the message returned is the entire file.
  // This protects against that
  function truncate(str, max) {
    return (typeof str === 'string') && (str.length > max) ?
      [str.slice(0, max/2), '...', str.length-max, '...', str.slice(-max/2)].join('') : str;
  }

  // http://stackoverflow.com/questions/1714786/querystring-encoding-of-a-javascript-object
  function toQueryString(obj, prefix) {
    var str = [];
    for(var p in obj) {
      /*jshint -W089 */
      if (!obj.hasOwnProperty(p)) continue;
      var k = prefix ? (prefix + '[' + p + ']') : p, v = obj[p];
      str.push(typeof v === 'object' ?
        toQueryString(v, k) :
        encodeURIComponent(k) + '=' + encodeURIComponent(v));
    }
    return str.join('&');
  }

  var keys = (function(Object) {
    return (Object && Object.keys) || function(obj) {
      var result = [];
      var hasOwnProperty = Object.prototype.hasOwnProperty;
      for(var k in obj) {
        /*jshint -W089 */
        hasOwnProperty.call(obj, k) && result.push(k);
      }
      return result;
    };
  })(root.Object);

  var forEach = function(arr, fn, ctx) {
    if (typeof fn !== 'function') return;
    var len = (arr && arr.length) >>> 0;
    for (var i = 0; i < len; i++) {
      fn.call(ctx, arr[i], i, arr);
    }
  };

  // var some = function(arr, fn, ctx) {
  //     if (typeof fn !== 'function') return false;
  //     var len = (arr && arr.length) >>> 0;
  //     for (var i = 0; i < len; i++) {
  //       if (i in arr && fn.call(ctx, arr[i], i, arr)) {
  //         return true;
  //       }
  //     }
  //     return false;
  // };

  // Even if JSON.stringify exists, it can still throw a RangeError
  // if you pass in a very large object or one with recursive refs.
  // Ex: JSON.stringify(window.navigator) // Range Error
  var stringify = (function(JSON) {
    return (JSON && JSON.stringify && function(obj) {
        try {
          return JSON.stringify(obj);
        } catch (err) {
          exceptions(err);
          return '"FAILED_JSON_STRINGIFY"';
        }
      }) || function() {
        return '"NO_JSON_STRINGIFY"';
      };
  })(root.JSON);

  // Emulate Tumblr.Flags if it's not present (DON'T EVER DO THIS!)
  var doods = (function(Tumblr) {
    return (Tumblr && Tumblr.Flags) || (function() {
      // Log missing Tumblr.Flags (only once)
      exceptions(new Error('Missing Tumblr.Flags in exceptions.js'));
      // Emulate Tumblr.Flags
      var store = {
        // Always log if Tumblr.Flags is missing
        'enable_js_errors_log': true,
        'enable_js_ephemeral_log': true
      };
      function maybecall(fn, val) {
        // jshint validthis:true
        return (typeof fn === 'function') ? fn.call(this, val) : fn;
      }
      return function(name) {
        var has = !!(store[name]);
        return function feature(accept, reject) {
          var result = maybecall.call(this, (has ? accept : reject), has);
          return (result !== void 0) ? result : feature;
        };
      };
    })();
  })(root.Tumblr);

  // Passing an Error object (like from a try/catch) will log the error as if
  // it were intercepted by "onerror". Otherwise, it'll go the special ephemeral log.
  // "doSometimes" takes a decimal proportion of time. So:
  // 0.10 means 10% of the time actually record this error.
  // 1 means always record (or if ommited also always record).
  function exceptions(data, doSometimes) {
    // (0 <= Math.random() < 1 )
    if (typeof doSometimes === 'number' && Math.random() > doSometimes) return;
    if (data instanceof Error) {
      // Error instances don't really have a 'url', 'ln', or 'col' properties, but
      // pass them anyway just in case they were manually added.
      // Set 'url' for proper Indef tagging
      data.url || (data.url = '//www.tumblr.com/');
      onError(data.message, data.url, data.ln, data.col, data);
    } else {
      // Please see Andres before you use the ephemeral log :)
      ephemeral.push(stringify(data));
    }
  }

  var reHasUrl = /https?:\/\//;
  var reHasTumblrUrl = /https?:\/\/[^/]*tumblr[^/]*/;

  // This gets called by the browser
  // It helps us filter out errors that might not be ours
  function onError(msg, url, ln, col, err) {
    try {
      // We only care about things that (1) Don't have a url, or (2) if
      // they have url, then that at least one must have "tumblr" in the host.
      url = truncate(url, 300) || '';
      if (reHasUrl.test(url) && !reHasTumblrUrl.test(url)) return;
      err = stringify(truncate(err && err.stack, 1000) || '');
      if (reHasUrl.test(err) && !reHasTumblrUrl.test(err)) return;
      errors.push({
        path: (document.location || {}).pathname || 'NO_LOCATION_OR_PATHNAME',
        // not sending lang for now
        // lang: (navigator.language || navigator.userLanguage || '').toLowerCase()
        msg: truncate(msg, 200) || '',
        // url's for errors from bookmarklets are the entire source of the bookmarklet.
        url: url,
        ln: parseInt(ln, 10) || -1,
        // Only Chrome 31+ report col and err
        col: parseInt(col, 10) || -1,
        err: err,
        group: doods('js_errors_a')('A', doods('js_errors_b')('B', '*'))
      });


    } catch (err) {
      // Do nothing. If something fails while recording an error,
      // then we're probably fucked - but lets not get stuck in a
      // error logging loop.
    }
  }

  // If you have MissingE, we don't trust any errors coming from your browser
  function isMissingE() {
    return ((document.head||{}).innerHTML||'').indexOf('#missinge_button') !== -1;
  }

  // Build more information around an error
  var debugDump = exceptions.debugDump = function() {
    var scripts = [];
    forEach(document.getElementsByTagName('script'), function(tag) {
      scripts.push(tag.src);
    });
    return {
      timestamp: +new Date(),
      path: (document.location || {}).href || 'NO_HREF',
      lang: (navigator || {}).userLanguage || (navigator || {}).language || 'NO_LANG',
      referrer: document.referrer || 'NO_REFERRER',
      ua: (navigator || {}).userAgent || 'NO_UA',
      timing: (performance || {}).timing || 'NO_TIMING',
      scripts: scripts,
      globals: keys(root),
      cookie: document.cookie,
      ephemeral: ephemeral,
      errors: errors,
      document: (document.documentElement || {}).innerHTML || 'NO_DOCUMENT'
    };
  };

  // Associates UserID to Errors
  function js_debugger(name) {
    var dump = debugDump();
    dump.name = name;
    return stringify(dump);
  }

  // Transmit errors
  function onBeforeUnload() {
    try {
      // (window.onerror === onError) || exceptions(new Error('window.onerror from exceptions.js was overridden'));

      // Do not log errors if page load was aborted
      if (!windowDidLoad) {
        errors.length = 0;
        exceptions(new Error('PAGE_DID_NOT_LOAD'));
      }

      var log;
      !isMissingE() && doods('enable_js_errors_log')(function() {
        errors.length && ((log || (log = {})).errors = errors);
      });
      doods('js_performance_logging')(function() {
        try {
          if(!performance || !performance.getEntriesByType) return; // Performance API not supported
          var entries = performance.getEntriesByType('resource');
          forEach(entries, function(entry) {
            if (entry.initiatorType !== 'img') return;
            var host = (entry.name.match(/\/\/([^/]+)/) || '')[1];
            if (host.indexOf('.tumblr.') === -1) return;
            var bucket = host.split('.')[0];
            perf.entries || (perf.entries = []);
            perf.entries.push({
              name: entry.name.split('tumblr.com/')[1],
              duration: entry.duration,
              bucket: bucket
            });
          });
          if (keys(perf)) {
            ((log || (log = {})).perf = perf);
            perf.timing = performance.timing;
          }
        } catch(err) {}
      });
      doods('enable_js_ephemeral_log')(function() {
        ephemeral.length && ((log || (log = {})).ephemeral = ephemeral);
      });
      doods('js_debugger_1')(function() {
        (log || (log = {})).ephemeral = [ js_debugger('js_debugger_1') ];
      });
      doods('js_debugger_2')(function() {
        (log || (log = {})).ephemeral = [ js_debugger('js_debugger_2') ];
      });
      if (!log) return;

      var xhr = new XMLHttpRequest();
      xhr.open('POST', '/svc/log/capture/exceptions', /* make async false */ false);
      xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
      xhr.onreadystatechange = function() {
        if (xhr.readyState !== 4) return;
        // In case 'beforeunload' runs again, we don't want to resend the same data
        errors.length = ephemeral.length = 0;
      };
      xhr.send(toQueryString({
        // 'body' doesn't have a form_key, but return an element to get undefined out of
        // getAttribute instead of throwing or adding too much error handling code.
        form_key: (document.getElementById('tumblr_form_key') || document.body).getAttribute('content'),
        log: log
      }));

    } catch(err) {
      // In case something goes wrong try to fallback on jQuery and log it
      if (!root.jQuery) return;
      exceptions(err);
      (log || (log = {})).errors || (log.errors = errors);
      root.jQuery.ajax({
        async: false,
        type: 'POST',
        data: {
          form_key: root.jQuery('#tumblr_form_key').attr('content'),
          log: log
        },
        url: '/svc/log/capture/exceptions',
        with_form_key: true
      });
    }
  }

  (function init() {
    addEventListener(window, 'beforeunload', onBeforeUnload);
    // onError handler has to be on `window.onerror` to collect meaningful data.
    window.onerror = onError;
  })();

  (exports.Utils || (exports.Utils = {})).exceptions = exceptions;

  function pageLoadTime() {
    if(!performance || !performance.timing) return; // Performance API not supported
    try {
      var now = new Date().getTime();
      var page_load_time = now - performance.timing.navigationStart;
      perf.page_load_time = page_load_time;
    } catch (err) {
      // Do nothing. If something fails while recording performance.
    }
  }

  function onLoad() {
    windowDidLoad = true;
    pageLoadTime();
  }
  addEventListener(window, 'load', onLoad);

  // For debugging
  // exceptions.beforeunload = onBeforeUnload;
  // exceptions.onerror = onError;
  // exceptions.test = function() {
  //     // 'throw' has to run on another tick because if you run this
  //     // from the console then 'onerror' won't receive it
  //     setTimeout(function() {
  //         throw new Error('Simualted error for testing.');
  //     });
  // };
  // exceptions.info = function() {
  //     console.log('enable_js_errors_log: %s', doods('enable_js_errors_log')(true, false));
  //     console.log('enable_js_ephemeral_log: %s', doods('enable_js_ephemeral_log')(true,false));
  //     console.log('errors[%d] ', errors.length, errors);
  //     console.log('ephemeral[%d] ', ephemeral.length, ephemeral);
  // };

})(this, this.Tumblr || (this.Tumblr = {}));
	/* jslint browser: true, jquery: true, devel: true*/

	/*
	Dependencies: Tumblr.Flags

	Tumblr.Utils.exceptions will automatically log window.onerror.

	DO NOT write code like this. This is written to handle weird cases
	where normal code should probably just fail.
	*/

	;(function(root, exports) {
	'use strict';

	// Keep local copies of globals in case they change.
	// We should also protect against prototype hijacking, but not today.
	var document = root.document;
	var encodeURIComponent = root.encodeURIComponent;
	var navigator = root.navigator;
	var parseInt = root.parseInt;
	var performance = root.performance;
	var window = root.window;
	var Date = root.Date;
	var Error = root.Error;
	var Math = root.Math;
	var XMLHttpRequest = root.XMLHttpRequest;


	// Stores
	var ephemeral = [];
	var errors = [];
	var perf = {};
	var windowDidLoad = false;

	// oldIE addEventListener shim
	function addEventListener(el, type, listener, useCapture) {
	el.addEventListener ?
	el.addEventListener(type, listener, !!useCapture) :
	el.attachEvent && el.attachEvent('on' + type, listener, !!useCapture);
	}

	// Truncate strings in the middle.
	// If an extension or a bookmarklet throws an error, the message returned is the entire file.
	// This protects against that
	function truncate(str, max) {
	return (typeof str === 'string') && (str.length > max) ?
	[str.slice(0, max/2), '...', str.length-max, '...', str.slice(-max/2)].join('') : str;
	}

	// http://stackoverflow.com/questions/1714786/querystring-encoding-of-a-javascript-object
	function toQueryString(obj, prefix) {
	var str = [];
	for(var p in obj) {
	/jshint -W089 /
	if (!obj.hasOwnProperty(p)) continue;
	var k = prefix ? (prefix + '[' + p + ']') : p, v = obj[p];
	str.push(typeof v === 'object' ?
	toQueryString(v, k) :
	encodeURIComponent(k) + '=' + encodeURIComponent(v));
	}
	return str.join('&');
	}

	var keys = (function(Object) {
	return (Object && Object.keys) \|\| function(obj) {
	var result = [];
	var hasOwnProperty = Object.prototype.hasOwnProperty;
	for(var k in obj) {
	/jshint -W089 /
	hasOwnProperty.call(obj, k) && result.push(k);
	}
	return result;
	};
	})(root.Object);

	var forEach = function(arr, fn, ctx) {
	if (typeof fn !== 'function') return;
	var len = (arr && arr.length) >>> 0;
	for (var i = 0; i < len; i++) {
	fn.call(ctx, arr[i], i, arr);
	}
	};

	// var some = function(arr, fn, ctx) {
	// if (typeof fn !== 'function') return false;
	// var len = (arr && arr.length) >>> 0;
	// for (var i = 0; i < len; i++) {
	// if (i in arr && fn.call(ctx, arr[i], i, arr)) {
	// return true;
	// }
	// }
	// return false;
	// };

	// Even if JSON.stringify exists, it can still throw a RangeError
	// if you pass in a very large object or one with recursive refs.
	// Ex: JSON.stringify(window.navigator) // Range Error
	var stringify = (function(JSON) {
	return (JSON && JSON.stringify && function(obj) {
	try {
	return JSON.stringify(obj);
	} catch (err) {
	exceptions(err);
	return '"FAILED_JSON_STRINGIFY"';
	}
	}) \|\| function() {
	return '"NO_JSON_STRINGIFY"';
	};
	})(root.JSON);

	// Emulate Tumblr.Flags if it's not present (DON'T EVER DO THIS!)
	var doods = (function(Tumblr) {
	return (Tumblr && Tumblr.Flags) \|\| (function() {
	// Log missing Tumblr.Flags (only once)
	exceptions(new Error('Missing Tumblr.Flags in exceptions.js'));
	// Emulate Tumblr.Flags
	var store = {
	// Always log if Tumblr.Flags is missing
	'enable_js_errors_log': true,
	'enable_js_ephemeral_log': true
	};
	function maybecall(fn, val) {
	// jshint validthis:true
	return (typeof fn === 'function') ? fn.call(this, val) : fn;
	}
	return function(name) {
	var has = !!(store[name]);
	return function feature(accept, reject) {
	var result = maybecall.call(this, (has ? accept : reject), has);
	return (result !== void 0) ? result : feature;
	};
	};
	})();
	})(root.Tumblr);

	// Passing an Error object (like from a try/catch) will log the error as if
	// it were intercepted by "onerror". Otherwise, it'll go the special ephemeral log.
	// "doSometimes" takes a decimal proportion of time. So:
	// 0.10 means 10% of the time actually record this error.
	// 1 means always record (or if ommited also always record).
	function exceptions(data, doSometimes) {
	// (0 <= Math.random() < 1 )
	if (typeof doSometimes === 'number' && Math.random() > doSometimes) return;
	if (data instanceof Error) {
	// Error instances don't really have a 'url', 'ln', or 'col' properties, but
	// pass them anyway just in case they were manually added.
	// Set 'url' for proper Indef tagging
	data.url \|\| (data.url = '//www.tumblr.com/');
	onError(data.message, data.url, data.ln, data.col, data);
	} else {
	// Please see Andres before you use the ephemeral log :)
	ephemeral.push(stringify(data));
	}
	}

	var reHasUrl = /https?:\/\//;
	var reHasTumblrUrl = /https?:\/\/[^/]tumblr[^/]/;

	// This gets called by the browser
	// It helps us filter out errors that might not be ours
	function onError(msg, url, ln, col, err) {
	try {
	// We only care about things that (1) Don't have a url, or (2) if
	// they have url, then that at least one must have "tumblr" in the host.
	url = truncate(url, 300) \|\| '';
	if (reHasUrl.test(url) && !reHasTumblrUrl.test(url)) return;
	err = stringify(truncate(err && err.stack, 1000) \|\| '');
	if (reHasUrl.test(err) && !reHasTumblrUrl.test(err)) return;
	errors.push({
	path: (document.location \|\| {}).pathname \|\| 'NO_LOCATION_OR_PATHNAME',
	// not sending lang for now
	// lang: (navigator.language \|\| navigator.userLanguage \|\| '').toLowerCase()
	msg: truncate(msg, 200) \|\| '',
	// url's for errors from bookmarklets are the entire source of the bookmarklet.
	url: url,
	ln: parseInt(ln, 10) \|\| -1,
	// Only Chrome 31+ report col and err
	col: parseInt(col, 10) \|\| -1,
	err: err,
	group: doods('js_errors_a')('A', doods('js_errors_b')('B', '*'))
	});


	} catch (err) {
	// Do nothing. If something fails while recording an error,
	// then we're probably fucked - but lets not get stuck in a
	// error logging loop.
	}
	}

	// If you have MissingE, we don't trust any errors coming from your browser
	function isMissingE() {
	return ((document.head\|\|{}).innerHTML\|\|'').indexOf('#missinge_button') !== -1;
	}

	// Build more information around an error
	var debugDump = exceptions.debugDump = function() {
	var scripts = [];
	forEach(document.getElementsByTagName('script'), function(tag) {
	scripts.push(tag.src);
	});
	return {
	timestamp: +new Date(),
	path: (document.location \|\| {}).href \|\| 'NO_HREF',
	lang: (navigator \|\| {}).userLanguage \|\| (navigator \|\| {}).language \|\| 'NO_LANG',
	referrer: document.referrer \|\| 'NO_REFERRER',
	ua: (navigator \|\| {}).userAgent \|\| 'NO_UA',
	timing: (performance \|\| {}).timing \|\| 'NO_TIMING',
	scripts: scripts,
	globals: keys(root),
	cookie: document.cookie,
	ephemeral: ephemeral,
	errors: errors,
	document: (document.documentElement \|\| {}).innerHTML \|\| 'NO_DOCUMENT'
	};
	};

	// Associates UserID to Errors
	function js_debugger(name) {
	var dump = debugDump();
	dump.name = name;
	return stringify(dump);
	}

	// Transmit errors
	function onBeforeUnload() {
	try {
	// (window.onerror === onError) \|\| exceptions(new Error('window.onerror from exceptions.js was overridden'));

	// Do not log errors if page load was aborted
	if (!windowDidLoad) {
	errors.length = 0;
	exceptions(new Error('PAGE_DID_NOT_LOAD'));
	}

	var log;
	!isMissingE() && doods('enable_js_errors_log')(function() {
	errors.length && ((log \|\| (log = {})).errors = errors);
	});
	doods('js_performance_logging')(function() {
	try {
	if(!performance \|\| !performance.getEntriesByType) return; // Performance API not supported
	var entries = performance.getEntriesByType('resource');
	forEach(entries, function(entry) {
	if (entry.initiatorType !== 'img') return;
	var host = (entry.name.match(/\/\/([^/]+)/) \|\| '')[1];
	if (host.indexOf('.tumblr.') === -1) return;
	var bucket = host.split('.')[0];
	perf.entries \|\| (perf.entries = []);
	perf.entries.push({
	name: entry.name.split('tumblr.com/')[1],
	duration: entry.duration,
	bucket: bucket
	});
	});
	if (keys(perf)) {
	((log \|\| (log = {})).perf = perf);
	perf.timing = performance.timing;
	}
	} catch(err) {}
	});
	doods('enable_js_ephemeral_log')(function() {
	ephemeral.length && ((log \|\| (log = {})).ephemeral = ephemeral);
	});
	doods('js_debugger_1')(function() {
	(log \|\| (log = {})).ephemeral = [ js_debugger('js_debugger_1') ];
	});
	doods('js_debugger_2')(function() {
	(log \|\| (log = {})).ephemeral = [ js_debugger('js_debugger_2') ];
	});
	if (!log) return;

	var xhr = new XMLHttpRequest();
	xhr.open('POST', '/svc/log/capture/exceptions', /* make async false */ false);
	xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
	xhr.onreadystatechange = function() {
	if (xhr.readyState !== 4) return;
	// In case 'beforeunload' runs again, we don't want to resend the same data
	errors.length = ephemeral.length = 0;
	};
	xhr.send(toQueryString({
	// 'body' doesn't have a form_key, but return an element to get undefined out of
	// getAttribute instead of throwing or adding too much error handling code.
	form_key: (document.getElementById('tumblr_form_key') \|\| document.body).getAttribute('content'),
	log: log
	}));

	} catch(err) {
	// In case something goes wrong try to fallback on jQuery and log it
	if (!root.jQuery) return;
	exceptions(err);
	(log \|\| (log = {})).errors \|\| (log.errors = errors);
	root.jQuery.ajax({
	async: false,
	type: 'POST',
	data: {
	form_key: root.jQuery('#tumblr_form_key').attr('content'),
	log: log
	},
	url: '/svc/log/capture/exceptions',
	with_form_key: true
	});
	}
	}

	(function init() {
	addEventListener(window, 'beforeunload', onBeforeUnload);
	// onError handler has to be on `window.onerror` to collect meaningful data.
	window.onerror = onError;
	})();

	(exports.Utils \|\| (exports.Utils = {})).exceptions = exceptions;

	function pageLoadTime() {
	if(!performance \|\| !performance.timing) return; // Performance API not supported
	try {
	var now = new Date().getTime();
	var page_load_time = now - performance.timing.navigationStart;
	perf.page_load_time = page_load_time;
	} catch (err) {
	// Do nothing. If something fails while recording performance.
	}
	}

	function onLoad() {
	windowDidLoad = true;
	pageLoadTime();
	}
	addEventListener(window, 'load', onLoad);

	// For debugging
	// exceptions.beforeunload = onBeforeUnload;
	// exceptions.onerror = onError;
	// exceptions.test = function() {
	// // 'throw' has to run on another tick because if you run this
	// // from the console then 'onerror' won't receive it
	// setTimeout(function() {
	// throw new Error('Simualted error for testing.');
	// });
	// };
	// exceptions.info = function() {
	// console.log('enable_js_errors_log: %s', doods('enable_js_errors_log')(true, false));
	// console.log('enable_js_ephemeral_log: %s', doods('enable_js_ephemeral_log')(true,false));
	// console.log('errors[%d] ', errors.length, errors);
	// console.log('ephemeral[%d] ', ephemeral.length, ephemeral);
	// };

	})(this, this.Tumblr \|\| (this.Tumblr = {}));