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96 lines
3.1 KiB
96 lines
3.1 KiB
4 years ago
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/*
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Proxy Plug-in
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Features:
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Times an upload to see if it appear suspiciously fast which might indicate a proxy server or anti-virus suite intercepting the upload.
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If the upload seems too fast an uploadError event is fired with PROXY error code after the final uploadProgress event.
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Adds a SWFUpload setting allowing you to tweak the bytes/s for triggering the error:
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proxy_detect_threshold : 256000
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Adds an UPLOAD_ERROR entry called PROXY:
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function uploadError(file, errorCode, message) {
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if (errorCode === SWFUpload.UPLOAD_ERROR.PROXY) {
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alert("You might have a proxy!");
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}
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}
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*/
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var SWFUpload;
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if (typeof(SWFUpload) === "function") {
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SWFUpload.proxyDetect = {};
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SWFUpload.UPLOAD_ERROR.PROXY = -30300;
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SWFUpload.prototype.initSettings = (function (oldInitSettings) {
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return function (userSettings) {
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if (typeof(oldInitSettings) === "function") {
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oldInitSettings.call(this, userSettings);
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}
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this.ensureDefault = function (settingName, defaultValue) {
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this.settings[settingName] = (userSettings[settingName] == undefined) ? defaultValue : userSettings[settingName];
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};
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// List used to keep the speed stats for the files we are tracking
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this.proxyDetectFileStartTimes = {};
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this.proxyDetectSettings = {};
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this.ensureDefault("proxy_detect_threshold", 256000); // Default is 250 KB per second
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this.proxyDetectSettings.user_upload_progress_handler = this.settings.upload_progress_handler;
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this.proxyDetectSettings.user_upload_complete_handler = this.settings.upload_complete_handler;
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this.settings.upload_progress_handler = SWFUpload.proxyDetect.uploadProgressHandler;
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this.settings.upload_complete_handler = SWFUpload.proxyDetect.uploadCompleteHandler;
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delete this.ensureDefault;
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};
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}(SWFUpload.prototype.initSettings));
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SWFUpload.proxyDetect.uploadProgressHandler = function (file, bytesComplete, bytesTotal) {
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var ex1 = null, time, differenceMS, bps;
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try {
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if (typeof this.proxyDetectSettings.user_upload_progress_handler === "function") {
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this.proxyDetectSettings.user_upload_progress_handler.call(this, file, bytesComplete, bytesTotal);
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}
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} catch (ex1) { }
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if (bytesComplete === 0) {
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this.proxyDetectFileStartTimes[file.ID] = new Date();
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} else if (bytesComplete === bytesTotal) {
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try {
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// Calculate the Bps and decide if we should trigger the error
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time = new Date();
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differenceMS = time.getTime() - this.proxyDetectFileStartTimes[file.ID].getTime();
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if (differenceMS === 0) {
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differenceMS = 1;
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}
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bps = bytesTotal / (differenceMS * 1000);
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if (bps > parseInt(this.settings.proxy_detect_threshold, 10)) {
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this.queueEvent("upload_error_handler", [file, SWFUpload.UPLOAD_ERROR.PROXY, bps]);
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}
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} catch (ex) {
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}
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}
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if (ex1 !== null) {
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throw(ex1);
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}
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};
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SWFUpload.proxyDetect.uploadCompleteHandler = function (file) {
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try {
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delete this.proxyDetectFileStartTimes[file.ID];
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} catch (ex) {
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}
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if (typeof this.proxyDetectSettings.user_upload_progress_handler === "function") {
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return this.proxyDetectSettings.user_upload_progress_handler.call(this, file);
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}
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};
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}
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