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Exported XHR function. Changed how dispose works for source handlers.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| /** | ||
| * Simple http request for retrieving external files (e.g. text tracks) | ||
| * | ||
| * ##### Example | ||
| * | ||
| * // using url string | ||
| * videojs.xhr('http://example.com/myfile.vtt', function(error, response, responseBody){}); | ||
| * | ||
| * // or options block | ||
| * videojs.xhr({ | ||
| * uri: 'http://example.com/myfile.vtt', | ||
| * method: 'GET', | ||
| * responseType: 'text' | ||
| * }, function(error, response, responseBody){ | ||
| * if (error) { | ||
| * // log the error | ||
| * } else { | ||
| * // successful, do something with the response | ||
| * } | ||
| * }); | ||
| * | ||
| * | ||
| * API is modeled after the Raynos/xhr, which we hope to use after | ||
| * getting browserify implemented. | ||
| * https://github.com/Raynos/xhr/blob/master/index.js | ||
| * | ||
| * @param {Object|String} options Options block or URL string | ||
| * @param {Function} callback The callback function | ||
| * @returns {Object} The request | ||
| */ | ||
| vjs.xhr = function(options, callback){ | ||
| var XHR, request, urlInfo, winLoc, fileUrl, crossOrigin, abortTimeout, successHandler, errorHandler; | ||
|
|
||
| // If options is a string it's the url | ||
| if (typeof options === 'string') { | ||
| options = { | ||
| uri: options | ||
| }; | ||
| } | ||
|
|
||
| // Merge with default options | ||
| videojs.util.mergeOptions({ | ||
| method: 'GET', | ||
| timeout: 45 * 1000 | ||
| }, options); | ||
|
|
||
| callback = callback || function(){}; | ||
|
|
||
| successHandler = function(){ | ||
| window.clearTimeout(abortTimeout); | ||
| callback(null, request, request.response || request.responseText); | ||
| }; | ||
|
|
||
| errorHandler = function(err){ | ||
| window.clearTimeout(abortTimeout); | ||
|
|
||
| if (!err || typeof err === 'string') { | ||
| err = new Error(err); | ||
| } | ||
|
|
||
| callback(err, request); | ||
| }; | ||
|
|
||
| XHR = window.XMLHttpRequest; | ||
|
|
||
| if (typeof XHR === 'undefined') { | ||
| // Shim XMLHttpRequest for older IEs | ||
| XHR = function () { | ||
| try { return new window.ActiveXObject('Msxml2.XMLHTTP.6.0'); } catch (e) {} | ||
| try { return new window.ActiveXObject('Msxml2.XMLHTTP.3.0'); } catch (f) {} | ||
| try { return new window.ActiveXObject('Msxml2.XMLHTTP'); } catch (g) {} | ||
| throw new Error('This browser does not support XMLHttpRequest.'); | ||
| }; | ||
| } | ||
|
|
||
| request = new XHR(); | ||
| // Store a reference to the url on the request instance | ||
| request.uri = options.uri; | ||
|
|
||
| urlInfo = vjs.parseUrl(options.uri); | ||
| winLoc = window.location; | ||
| // Check if url is for another domain/origin | ||
| // IE8 doesn't know location.origin, so we won't rely on it here | ||
| crossOrigin = (urlInfo.protocol + urlInfo.host) !== (winLoc.protocol + winLoc.host); | ||
|
|
||
| // XDomainRequest -- Use for IE if XMLHTTPRequest2 isn't available | ||
| // 'withCredentials' is only available in XMLHTTPRequest2 | ||
| // Also XDomainRequest has a lot of gotchas, so only use if cross domain | ||
| if (crossOrigin && window.XDomainRequest && !('withCredentials' in request)) { | ||
| request = new window.XDomainRequest(); | ||
| request.onload = successHandler; | ||
| request.onerror = errorHandler; | ||
| // These blank handlers need to be set to fix ie9 | ||
| // http://cypressnorth.com/programming/internet-explorer-aborting-ajax-requests-fixed/ | ||
| request.onprogress = function(){}; | ||
| request.ontimeout = function(){}; | ||
|
|
||
| // XMLHTTPRequest | ||
| } else { | ||
| fileUrl = (urlInfo.protocol == 'file:' || winLoc.protocol == 'file:'); | ||
|
|
||
| request.onreadystatechange = function() { | ||
| if (request.readyState === 4) { | ||
| if (request.timedout) { | ||
| return errorHandler('timeout'); | ||
| } | ||
|
|
||
| if (request.status === 200 || fileUrl && request.status === 0) { | ||
| successHandler(); | ||
| } else { | ||
| errorHandler(); | ||
| } | ||
| } | ||
| }; | ||
|
|
||
| if (options.timeout) { | ||
| abortTimeout = window.setTimeout(function() { | ||
| if (request.readyState !== 4) { | ||
| request.timedout = true; | ||
| request.abort(); | ||
| } | ||
| }, options.timeout); | ||
| } | ||
| } | ||
|
|
||
| // open the connection | ||
| try { | ||
| // Third arg is async, or ignored by XDomainRequest | ||
| request.open(options.method || 'GET', options.uri, true); | ||
| } catch(err) { | ||
| return errorHandler(err); | ||
| } | ||
|
|
||
| // withCredentials only supported by XMLHttpRequest2 | ||
| if(options.withCredentials) { | ||
| request.withCredentials = true; | ||
| } | ||
|
|
||
| if (options.responseType) { | ||
| request.responseType = options.responseType; | ||
| } | ||
|
|
||
| // send the request | ||
| try { | ||
| request.send(); | ||
| } catch(err) { | ||
| return errorHandler(err); | ||
| } | ||
|
|
||
| return request; | ||
| }; |
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