X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/c930e9176a5a85509c5b0230e2bff5c22a591432..25ef3491bd9ae007ff1fc2b0d7943e6eaaccf775:/docs/source/swfupload.speed.html
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-
-
- The source code
-
-
-
-
- /*
- Speed Plug-in
-
- Features:
- *Adds several properties to the 'file' object indicated upload speed, time left, upload time, etc.
- - currentSpeed -- String indicating the upload speed, bytes per second
- - averageSpeed -- Overall average upload speed, bytes per second
- - movingAverageSpeed -- Speed over averaged over the last several measurements, bytes per second
- - timeRemaining -- Estimated remaining upload time in seconds
- - timeElapsed -- Number of seconds passed for this upload
- - percentUploaded -- Percentage of the file uploaded (0 to 100)
- - sizeUploaded -- Formatted size uploaded so far, bytes
-
- *Adds setting 'moving_average_history_size' for defining the window size used to calculate the moving average speed.
-
- *Adds several Formatting functions for formatting that values provided on the file object.
- - SWFUpload.speed.formatBPS(bps) -- outputs string formatted in the best units (Gbps, Mbps, Kbps, bps)
- - SWFUpload.speed.formatTime(seconds) -- outputs string formatted in the best units (x Hr y M z S)
- - SWFUpload.speed.formatSize(bytes) -- outputs string formatted in the best units (w GB x MB y KB z B )
- - SWFUpload.speed.formatPercent(percent) -- outputs string formatted with a percent sign (x.xx %)
- - SWFUpload.speed.formatUnits(baseNumber, divisionArray, unitLabelArray, fractionalBoolean)
- - Formats a number using the division array to determine how to apply the labels in the Label Array
- - factionalBoolean indicates whether the number should be returned as a single fractional number with a unit (speed)
- or as several numbers labeled with units (time)
- */
-
-var SWFUpload;
-if (typeof(SWFUpload) === "function") {
- SWFUpload.speed = {};
-
- SWFUpload.prototype.initSettings = (function (oldInitSettings) {
- return function () {
- if (typeof(oldInitSettings) === "function") {
- oldInitSettings.call(this);
- }
-
- this.ensureDefault = function (settingName, defaultValue) {
- this.settings[settingName] = (this.settings[settingName] == undefined) ? defaultValue : this.settings[settingName];
- };
-
- // List used to keep the speed stats for the files we are tracking
- this.fileSpeedStats = {};
- this.speedSettings = {};
-
- this.ensureDefault("moving_average_history_size", "10");
-
- this.speedSettings.user_file_queued_handler = this.settings.file_queued_handler;
- this.speedSettings.user_file_queue_error_handler = this.settings.file_queue_error_handler;
- this.speedSettings.user_upload_start_handler = this.settings.upload_start_handler;
- this.speedSettings.user_upload_error_handler = this.settings.upload_error_handler;
- this.speedSettings.user_upload_progress_handler = this.settings.upload_progress_handler;
- this.speedSettings.user_upload_success_handler = this.settings.upload_success_handler;
- this.speedSettings.user_upload_complete_handler = this.settings.upload_complete_handler;
-
- this.settings.file_queued_handler = SWFUpload.speed.fileQueuedHandler;
- this.settings.file_queue_error_handler = SWFUpload.speed.fileQueueErrorHandler;
- this.settings.upload_start_handler = SWFUpload.speed.uploadStartHandler;
- this.settings.upload_error_handler = SWFUpload.speed.uploadErrorHandler;
- this.settings.upload_progress_handler = SWFUpload.speed.uploadProgressHandler;
- this.settings.upload_success_handler = SWFUpload.speed.uploadSuccessHandler;
- this.settings.upload_complete_handler = SWFUpload.speed.uploadCompleteHandler;
-
- delete this.ensureDefault;
- };
- })(SWFUpload.prototype.initSettings);
-
-
- SWFUpload.speed.fileQueuedHandler = function (file) {
- if (typeof this.speedSettings.user_file_queued_handler === "function") {
- file = SWFUpload.speed.extendFile(file);
-
- return this.speedSettings.user_file_queued_handler.call(this, file);
- }
- };
-
- SWFUpload.speed.fileQueueErrorHandler = function (file, errorCode, message) {
- if (typeof this.speedSettings.user_file_queue_error_handler === "function") {
- file = SWFUpload.speed.extendFile(file);
-
- return this.speedSettings.user_file_queue_error_handler.call(this, file, errorCode, message);
- }
- };
-
- SWFUpload.speed.uploadStartHandler = function (file) {
- if (typeof this.speedSettings.user_upload_start_handler === "function") {
- file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
- return this.speedSettings.user_upload_start_handler.call(this, file);
- }
- };
-
- SWFUpload.speed.uploadErrorHandler = function (file, errorCode, message) {
- file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
- SWFUpload.speed.removeTracking(file, this.fileSpeedStats);
-
- if (typeof this.speedSettings.user_upload_error_handler === "function") {
- return this.speedSettings.user_upload_error_handler.call(this, file, errorCode, message);
- }
- };
- SWFUpload.speed.uploadProgressHandler = function (file, bytesComplete, bytesTotal) {
- this.updateTracking(file, bytesComplete);
- file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
-
- if (typeof this.speedSettings.user_upload_progress_handler === "function") {
- return this.speedSettings.user_upload_progress_handler.call(this, file, bytesComplete, bytesTotal);
- }
- };
-
- SWFUpload.speed.uploadSuccessHandler = function (file, serverData) {
- if (typeof this.speedSettings.user_upload_success_handler === "function") {
- file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
- return this.speedSettings.user_upload_success_handler.call(this, file, serverData);
- }
- };
- SWFUpload.speed.uploadCompleteHandler = function (file) {
- file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
- SWFUpload.speed.removeTracking(file, this.fileSpeedStats);
-
- if (typeof this.speedSettings.user_upload_complete_handler === "function") {
- return this.speedSettings.user_upload_complete_handler.call(this, file);
- }
- };
-
- // Private: extends the file object with the speed plugin values
- SWFUpload.speed.extendFile = function (file, trackingList) {
- var tracking;
-
- if (trackingList) {
- tracking = trackingList[file.id];
- }
-
- if (tracking) {
- file.currentSpeed = tracking.currentSpeed;
- file.averageSpeed = tracking.averageSpeed;
- file.movingAverageSpeed = tracking.movingAverageSpeed;
- file.timeRemaining = tracking.timeRemaining;
- file.timeElapsed = tracking.timeElapsed;
- file.percentUploaded = tracking.percentUploaded;
- file.sizeUploaded = tracking.bytesUploaded;
-
- } else {
- file.currentSpeed = 0;
- file.averageSpeed = 0;
- file.movingAverageSpeed = 0;
- file.timeRemaining = 0;
- file.timeElapsed = 0;
- file.percentUploaded = 0;
- file.sizeUploaded = 0;
- }
-
- return file;
- };
-
- // Private: Updates the speed tracking object, or creates it if necessary
- SWFUpload.prototype.updateTracking = function (file, bytesUploaded) {
- var tracking = this.fileSpeedStats[file.id];
- if (!tracking) {
- this.fileSpeedStats[file.id] = tracking = {};
- }
-
- // Sanity check inputs
- bytesUploaded = bytesUploaded || tracking.bytesUploaded || 0;
- if (bytesUploaded < 0) {
- bytesUploaded = 0;
- }
- if (bytesUploaded > file.size) {
- bytesUploaded = file.size;
- }
-
- var tickTime = (new Date()).getTime();
- if (!tracking.startTime) {
- tracking.startTime = (new Date()).getTime();
- tracking.lastTime = tracking.startTime;
- tracking.currentSpeed = 0;
- tracking.averageSpeed = 0;
- tracking.movingAverageSpeed = 0;
- tracking.movingAverageHistory = [];
- tracking.timeRemaining = 0;
- tracking.timeElapsed = 0;
- tracking.percentUploaded = bytesUploaded / file.size;
- tracking.bytesUploaded = bytesUploaded;
- } else if (tracking.startTime > tickTime) {
- this.debug("When backwards in time");
- } else {
- // Get time and deltas
- var now = (new Date()).getTime();
- var lastTime = tracking.lastTime;
- var deltaTime = now - lastTime;
- var deltaBytes = bytesUploaded - tracking.bytesUploaded;
-
- if (deltaBytes === 0 || deltaTime === 0) {
- return tracking;
- }
-
- // Update tracking object
- tracking.lastTime = now;
- tracking.bytesUploaded = bytesUploaded;
-
- // Calculate speeds
- tracking.currentSpeed = (deltaBytes * 8 ) / (deltaTime / 1000);
- tracking.averageSpeed = (tracking.bytesUploaded * 8) / ((now - tracking.startTime) / 1000);
-
- // Calculate moving average
- tracking.movingAverageHistory.push(tracking.currentSpeed);
- if (tracking.movingAverageHistory.length > this.settings.moving_average_history_size) {
- tracking.movingAverageHistory.shift();
- }
-
- tracking.movingAverageSpeed = SWFUpload.speed.calculateMovingAverage(tracking.movingAverageHistory);
-
- // Update times
- tracking.timeRemaining = (file.size - tracking.bytesUploaded) * 8 / tracking.movingAverageSpeed;
- tracking.timeElapsed = (now - tracking.startTime) / 1000;
-
- // Update percent
- tracking.percentUploaded = (tracking.bytesUploaded / file.size * 100);
- }
-
- return tracking;
- };
- SWFUpload.speed.removeTracking = function (file, trackingList) {
- try {
- trackingList[file.id] = null;
- delete trackingList[file.id];
- } catch (ex) {
- }
- };
-
- SWFUpload.speed.formatUnits = function (baseNumber, unitDivisors, unitLabels, singleFractional) {
- var i, unit, unitDivisor, unitLabel;
-
- if (baseNumber === 0) {
- return "0 " + unitLabels[unitLabels.length - 1];
- }
-
- if (singleFractional) {
- unit = baseNumber;
- unitLabel = unitLabels.length >= unitDivisors.length ? unitLabels[unitDivisors.length - 1] : "";
- for (i = 0; i < unitDivisors.length; i++) {
- if (baseNumber >= unitDivisors[i]) {
- unit = (baseNumber / unitDivisors[i]).toFixed(2);
- unitLabel = unitLabels.length >= i ? " " + unitLabels[i] : "";
- break;
- }
- }
-
- return unit + unitLabel;
- } else {
- var formattedStrings = [];
- var remainder = baseNumber;
-
- for (i = 0; i < unitDivisors.length; i++) {
- unitDivisor = unitDivisors[i];
- unitLabel = unitLabels.length > i ? " " + unitLabels[i] : "";
-
- unit = remainder / unitDivisor;
- if (i < unitDivisors.length -1) {
- unit = Math.floor(unit);
- } else {
- unit = unit.toFixed(2);
- }
- if (unit > 0) {
- remainder = remainder % unitDivisor;
-
- formattedStrings.push(unit + unitLabel);
- }
- }
-
- return formattedStrings.join(" ");
- }
- };
-
- SWFUpload.speed.formatBPS = function (baseNumber) {
- var bpsUnits = [1073741824, 1048576, 1024, 1], bpsUnitLabels = ["Gbps", "Mbps", "Kbps", "bps"];
- return SWFUpload.speed.formatUnits(baseNumber, bpsUnits, bpsUnitLabels, true);
-
- };
- SWFUpload.speed.formatTime = function (baseNumber) {
- var timeUnits = [86400, 3600, 60, 1], timeUnitLabels = ["d", "h", "m", "s"];
- return SWFUpload.speed.formatUnits(baseNumber, timeUnits, timeUnitLabels, false);
-
- };
- SWFUpload.speed.formatBytes = function (baseNumber) {
- var sizeUnits = [1073741824, 1048576, 1024, 1], sizeUnitLabels = ["GB", "MB", "KB", "bytes"];
- return SWFUpload.speed.formatUnits(baseNumber, sizeUnits, sizeUnitLabels, true);
-
- };
- SWFUpload.speed.formatPercent = function (baseNumber) {
- return baseNumber.toFixed(2) + " %";
- };
-
- SWFUpload.speed.calculateMovingAverage = function (history) {
- var vals = [], size, sum = 0.0, mean = 0.0, varianceTemp = 0.0, variance = 0.0, standardDev = 0.0;
- var i;
- var mSum = 0, mCount = 0;
-
- size = history.length;
-
- // Check for sufficient data
- if (size >= 8) {
- // Clone the array and Calculate sum of the values
- for (i = 0; i < size; i++) {
- vals[i] = history[i];
- sum += vals[i];
- }
-
- mean = sum / size;
-
- // Calculate variance for the set
- for (i = 0; i < size; i++) {
- varianceTemp += Math.pow((vals[i] - mean), 2);
- }
-
- variance = varianceTemp / size;
- standardDev = Math.sqrt(variance);
-
- //Standardize the Data
- for (i = 0; i < size; i++) {
- vals[i] = (vals[i] - mean) / standardDev;
- }
-
- // Calculate the average excluding outliers
- var deviationRange = 2.0;
- for (i = 0; i < size; i++) {
-
- if (vals[i] <= deviationRange && vals[i] >= -deviationRange) {
- mCount++;
- mSum += history[i];
- }
- }
-
- } else {
- // Calculate the average (not enough data points to remove outliers)
- mCount = size;
- for (i = 0; i < size; i++) {
- mSum += history[i];
- }
- }
-
- return mSum / mCount;
- };
-
-}
-
-
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