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Simplify OpenSeadragon.makeAjaxRequest

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* Since async is always true – and browsers are starting to deprecate
  synchronous XHR – we were able to prune considerable amount of code
* Add an error callback to match the existing success callback
This commit is contained in:
Chris Adams 2013-06-26 16:27:52 -04:00
parent bb1dd78979
commit 496b7d757b
1 changed files with 17 additions and 42 deletions
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59
src/openseadragon.js
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@ -1306,64 +1306,39 @@ window.OpenSeadragon = window.OpenSeadragon || function( options ){
* @function
* @name OpenSeadragon.makeAjaxRequest
* @param {String} url - the url to request
* @param {Function} [callback] - a function to call when complete
* @param {Function} onSuccess - a function to call on a successful response
* @param {Function} onError - a function to call on when an error occurs
* @throws {Error}
*/
makeAjaxRequest: function( url, callback ) {
makeAjaxRequest: function( url, onSuccess, onError ) {
var request = $.createAjaxRequest();
var async = true,
request = $.createAjaxRequest(),
options;
request.onreadystatechange = function() {
// 4 = DONE (https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest#Properties)
if ( request.readyState == 4) {
request.onreadystatechange = function(){};
if( $.isPlainObject( url ) ){
options.async = options.async || async;
}else{
options = {
url: url,
async: $.isFunction( callback ),
success: callback,
error: null
};
}
if ( options.async ) {
/** @ignore */
request.onreadystatechange = function() {
// 4 = DONE (https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest#Properties)
if ( request.readyState == 4) {
request.onreadystatechange = function(){};
options.success( request );
if (request.status == 200) {
onSuccess( request );
} else {
onError( request );
}
};
}
}
};
try {
request.open( "GET", options.url, options.async );
request.open( "GET", url, true );
request.send( null );
} catch (e) {
$.console.log(
"%s while making AJAX request: %s",
e.name,
e.message
);
$.console.log("%s while making AJAX request: %s", e.name, e.message);
request.onreadystatechange = function(){};
request = null;
if ( options.error && $.isFunction( options.error ) ) {
options.error( request );
}
onError(request, e);
}
if( !options.async && $.isFunction( options.success ) ){
options.success( request );
}
return options.async ? null : request;
},
/**
* Taken from jQuery 1.6.1
* @function