source: [view]
define("dojo/_base/xhr", ["dojo/lib/kernel", "dojo/_base/Deferred", "dojo/_base/json", "dojo/_base/lang", "dojo/_base/query"], function(dojo){
//>>excludeStart("webkitMobile", kwArgs.webkitMobile);
(function(){
//>>excludeEnd("webkitMobile");
var _d = dojo, cfg = _d.config;
function setValue(/*Object*/obj, /*String*/name, /*String*/value){
//summary:
// For the named property in object, set the value. If a value
// already exists and it is a string, convert the value to be an
// array of values.
//Skip it if there is no value
if(value === null){
return;
}
var val = obj[name];
if(typeof val == "string"){ // inline'd type check
obj[name] = [val, value];
}else if(_d.isArray(val)){
val.push(value);
}else{
obj[name] = value;
}
}
dojo.fieldToObject = function(/*DOMNode||String*/ inputNode){
// summary:
// Serialize a form field to a JavaScript object.
//
// description:
// Returns the value encoded in a form field as
// as a string or an array of strings. Disabled form elements
// and unchecked radio and checkboxes are skipped. Multi-select
// elements are returned as an array of string values.
var ret = null;
var item = _d.byId(inputNode);
if(item){
var _in = item.name;
var type = (item.type||"").toLowerCase();
if(_in && type && !item.disabled){
if(type == "radio" || type == "checkbox"){
if(item.checked){ ret = item.value; }
}else if(item.multiple){
ret = [];
_d.query("option", item).forEach(function(opt){
if(opt.selected){
ret.push(opt.value);
}
});
}else{
ret = item.value;
}
}
}
return ret; // Object
};
dojo.formToObject = function(/*DOMNode||String*/ formNode){
// summary:
// Serialize a form node to a JavaScript object.
// description:
// Returns the values encoded in an HTML form as
// string properties in an object which it then returns. Disabled form
// elements, buttons, and other non-value form elements are skipped.
// Multi-select elements are returned as an array of string values.
//
// example:
// This form:
// |
//
// yields this object structure as the result of a call to
// formToObject():
//
// | {
// | blah: "blah",
// | multi: [
// | "thud",
// | "thonk"
// | ]
// | };
var ret = {};
var exclude = "file|submit|image|reset|button|";
_d.forEach(dojo.byId(formNode).elements, function(item){
var _in = item.name;
var type = (item.type||"").toLowerCase();
if(_in && type && exclude.indexOf(type) == -1 && !item.disabled){
setValue(ret, _in, _d.fieldToObject(item));
if(type == "image"){
ret[_in+".x"] = ret[_in+".y"] = ret[_in].x = ret[_in].y = 0;
}
}
});
return ret; // Object
};
dojo.objectToQuery = function(/*Object*/ map){
// summary:
// takes a name/value mapping object and returns a string representing
// a URL-encoded version of that object.
// example:
// this object:
//
// | {
// | blah: "blah",
// | multi: [
// | "thud",
// | "thonk"
// | ]
// | };
//
// yields the following query string:
//
// | "blah=blah&multi=thud&multi=thonk"
// FIXME: need to implement encodeAscii!!
var enc = encodeURIComponent;
var pairs = [];
var backstop = {};
for(var name in map){
var value = map[name];
if(value != backstop[name]){
var assign = enc(name) + "=";
if(_d.isArray(value)){
for(var i=0; i < value.length; i++){
pairs.push(assign + enc(value[i]));
}
}else{
pairs.push(assign + enc(value));
}
}
}
return pairs.join("&"); // String
};
dojo.formToQuery = function(/*DOMNode||String*/ formNode){
// summary:
// Returns a URL-encoded string representing the form passed as either a
// node or string ID identifying the form to serialize
return _d.objectToQuery(_d.formToObject(formNode)); // String
};
dojo.formToJson = function(/*DOMNode||String*/ formNode, /*Boolean?*/prettyPrint){
// summary:
// Create a serialized JSON string from a form node or string
// ID identifying the form to serialize
return _d.toJson(_d.formToObject(formNode), prettyPrint); // String
};
dojo.queryToObject = function(/*String*/ str){
// summary:
// Create an object representing a de-serialized query section of a
// URL. Query keys with multiple values are returned in an array.
//
// example:
// This string:
//
// | "foo=bar&foo=baz&thinger=%20spaces%20=blah&zonk=blarg&"
//
// results in this object structure:
//
// | {
// | foo: [ "bar", "baz" ],
// | thinger: " spaces =blah",
// | zonk: "blarg"
// | }
//
// Note that spaces and other urlencoded entities are correctly
// handled.
// FIXME: should we grab the URL string if we're not passed one?
var ret = {};
var qp = str.split("&");
var dec = decodeURIComponent;
_d.forEach(qp, function(item){
if(item.length){
var parts = item.split("=");
var name = dec(parts.shift());
var val = dec(parts.join("="));
if(typeof ret[name] == "string"){ // inline'd type check
ret[name] = [ret[name]];
}
if(_d.isArray(ret[name])){
ret[name].push(val);
}else{
ret[name] = val;
}
}
});
return ret; // Object
};
// need to block async callbacks from snatching this thread as the result
// of an async callback might call another sync XHR, this hangs khtml forever
// must checked by watchInFlight()
dojo._blockAsync = false;
// MOW: remove dojo._contentHandlers alias in 2.0
var handlers = _d._contentHandlers = dojo.contentHandlers = {
// summary:
// A map of availble XHR transport handle types. Name matches the
// `handleAs` attribute passed to XHR calls.
//
// description:
// A map of availble XHR transport handle types. Name matches the
// `handleAs` attribute passed to XHR calls. Each contentHandler is
// called, passing the xhr object for manipulation. The return value
// from the contentHandler will be passed to the `load` or `handle`
// functions defined in the original xhr call.
//
// example:
// Creating a custom content-handler:
// | dojo.contentHandlers.makeCaps = function(xhr){
// | return xhr.responseText.toUpperCase();
// | }
// | // and later:
// | dojo.xhrGet({
// | url:"foo.txt",
// | handleAs:"makeCaps",
// | load: function(data){ /* data is a toUpper version of foo.txt */ }
// | });
text: function(xhr){
// summary: A contentHandler which simply returns the plaintext response data
return xhr.responseText;
},
json: function(xhr){
// summary: A contentHandler which returns a JavaScript object created from the response data
return _d.fromJson(xhr.responseText || null);
},
"json-comment-filtered": function(xhr){
// summary: A contentHandler which expects comment-filtered JSON.
// description:
// A contentHandler which expects comment-filtered JSON.
// the json-comment-filtered option was implemented to prevent
// "JavaScript Hijacking", but it is less secure than standard JSON. Use
// standard JSON instead. JSON prefixing can be used to subvert hijacking.
//
// Will throw a notice suggesting to use application/json mimetype, as
// json-commenting can introduce security issues. To decrease the chances of hijacking,
// use the standard `json` contentHandler, and prefix your "JSON" with: {}&&
//
// use djConfig.useCommentedJson = true to turn off the notice
if(!dojo.config.useCommentedJson){
console.warn("Consider using the standard mimetype:application/json."
+ " json-commenting can introduce security issues. To"
+ " decrease the chances of hijacking, use the standard the 'json' handler and"
+ " prefix your json with: {}&&\n"
+ "Use djConfig.useCommentedJson=true to turn off this message.");
}
var value = xhr.responseText;
var cStartIdx = value.indexOf("\/*");
var cEndIdx = value.lastIndexOf("*\/");
if(cStartIdx == -1 || cEndIdx == -1){
throw new Error("JSON was not comment filtered");
}
return _d.fromJson(value.substring(cStartIdx+2, cEndIdx));
},
javascript: function(xhr){
// summary: A contentHandler which evaluates the response data, expecting it to be valid JavaScript
// FIXME: try Moz and IE specific eval variants?
return _d.eval(xhr.responseText);
},
xml: function(xhr){
// summary: A contentHandler returning an XML Document parsed from the response data
var result = xhr.responseXML;
//>>excludeStart("webkitMobile", kwArgs.webkitMobile);
if(_d.isIE && (!result || !result.documentElement)){
//WARNING: this branch used by the xml handling in dojo.io.iframe,
//so be sure to test dojo.io.iframe if making changes below.
var ms = function(n){ return "MSXML" + n + ".DOMDocument"; };
var dp = ["Microsoft.XMLDOM", ms(6), ms(4), ms(3), ms(2)];
_d.some(dp, function(p){
try{
var dom = new ActiveXObject(p);
dom.async = false;
dom.loadXML(xhr.responseText);
result = dom;
}catch(e){ return false; }
return true;
});
}
//>>excludeEnd("webkitMobile");
return result; // DOMDocument
},
"json-comment-optional": function(xhr){
// summary: A contentHandler which checks the presence of comment-filtered JSON and
// alternates between the `json` and `json-comment-filtered` contentHandlers.
if(xhr.responseText && /^[^{\[]*\/\*/.test(xhr.responseText)){
return handlers["json-comment-filtered"](xhr);
}else{
return handlers["json"](xhr);
}
}
};
dojo.__IoArgs = function(){
// url: String
// URL to server endpoint.
// content: Object?
// Contains properties with string values. These
// properties will be serialized as name1=value2 and
// passed in the request.
// timeout: Integer?
// Milliseconds to wait for the response. If this time
// passes, the then error callbacks are called.
// form: DOMNode?
// DOM node for a form. Used to extract the form values
// and send to the server.
// preventCache: Boolean?
// Default is false. If true, then a
// "dojo.preventCache" parameter is sent in the request
// with a value that changes with each request
// (timestamp). Useful only with GET-type requests.
// handleAs: String?
// Acceptable values depend on the type of IO
// transport (see specific IO calls for more information).
// rawBody: String?
// Sets the raw body for an HTTP request. If this is used, then the content
// property is ignored. This is mostly useful for HTTP methods that have
// a body to their requests, like PUT or POST. This property can be used instead
// of postData and putData for dojo.rawXhrPost and dojo.rawXhrPut respectively.
// ioPublish: Boolean?
// Set this explicitly to false to prevent publishing of topics related to
// IO operations. Otherwise, if djConfig.ioPublish is set to true, topics
// will be published via dojo.publish for different phases of an IO operation.
// See dojo.__IoPublish for a list of topics that are published.
// load: Function?
// This function will be
// called on a successful HTTP response code.
// error: Function?
// This function will
// be called when the request fails due to a network or server error, the url
// is invalid, etc. It will also be called if the load or handle callback throws an
// exception, unless djConfig.debugAtAllCosts is true. This allows deployed applications
// to continue to run even when a logic error happens in the callback, while making
// it easier to troubleshoot while in debug mode.
// handle: Function?
// This function will
// be called at the end of every request, whether or not an error occurs.
this.url = url;
this.content = content;
this.timeout = timeout;
this.form = form;
this.preventCache = preventCache;
this.handleAs = handleAs;
this.ioPublish = ioPublish;
this.load = function(response, ioArgs){
// ioArgs: dojo.__IoCallbackArgs
// Provides additional information about the request.
// response: Object
// The response in the format as defined with handleAs.
}
this.error = function(response, ioArgs){
// ioArgs: dojo.__IoCallbackArgs
// Provides additional information about the request.
// response: Object
// The response in the format as defined with handleAs.
}
this.handle = function(loadOrError, response, ioArgs){
// loadOrError: String
// Provides a string that tells you whether this function
// was called because of success (load) or failure (error).
// response: Object
// The response in the format as defined with handleAs.
// ioArgs: dojo.__IoCallbackArgs
// Provides additional information about the request.
}
}
dojo.__IoCallbackArgs = function(args, xhr, url, query, handleAs, id, canDelete, json){
// args: Object
// the original object argument to the IO call.
// xhr: XMLHttpRequest
// For XMLHttpRequest calls only, the
// XMLHttpRequest object that was used for the
// request.
// url: String
// The final URL used for the call. Many times it
// will be different than the original args.url
// value.
// query: String
// For non-GET requests, the
// name1=value1&name2=value2 parameters sent up in
// the request.
// handleAs: String
// The final indicator on how the response will be
// handled.
// id: String
// For dojo.io.script calls only, the internal
// script ID used for the request.
// canDelete: Boolean
// For dojo.io.script calls only, indicates
// whether the script tag that represents the
// request can be deleted after callbacks have
// been called. Used internally to know when
// cleanup can happen on JSONP-type requests.
// json: Object
// For dojo.io.script calls only: holds the JSON
// response for JSONP-type requests. Used
// internally to hold on to the JSON responses.
// You should not need to access it directly --
// the same object should be passed to the success
// callbacks directly.
this.args = args;
this.xhr = xhr;
this.url = url;
this.query = query;
this.handleAs = handleAs;
this.id = id;
this.canDelete = canDelete;
this.json = json;
}
dojo.__IoPublish = function(){
// summary:
// This is a list of IO topics that can be published
// if djConfig.ioPublish is set to true. IO topics can be
// published for any Input/Output, network operation. So,
// dojo.xhr, dojo.io.script and dojo.io.iframe can all
// trigger these topics to be published.
// start: String
// "/dojo/io/start" is sent when there are no outstanding IO
// requests, and a new IO request is started. No arguments
// are passed with this topic.
// send: String
// "/dojo/io/send" is sent whenever a new IO request is started.
// It passes the dojo.Deferred for the request with the topic.
// load: String
// "/dojo/io/load" is sent whenever an IO request has loaded
// successfully. It passes the response and the dojo.Deferred
// for the request with the topic.
// error: String
// "/dojo/io/error" is sent whenever an IO request has errored.
// It passes the error and the dojo.Deferred
// for the request with the topic.
// done: String
// "/dojo/io/done" is sent whenever an IO request has completed,
// either by loading or by erroring. It passes the error and
// the dojo.Deferred for the request with the topic.
// stop: String
// "/dojo/io/stop" is sent when all outstanding IO requests have
// finished. No arguments are passed with this topic.
this.start = "/dojo/io/start";
this.send = "/dojo/io/send";
this.load = "/dojo/io/load";
this.error = "/dojo/io/error";
this.done = "/dojo/io/done";
this.stop = "/dojo/io/stop";
}
dojo._ioSetArgs = function(/*dojo.__IoArgs*/args,
/*Function*/canceller,
/*Function*/okHandler,
/*Function*/errHandler){
// summary:
// sets up the Deferred and ioArgs property on the Deferred so it
// can be used in an io call.
// args:
// The args object passed into the public io call. Recognized properties on
// the args object are:
// canceller:
// The canceller function used for the Deferred object. The function
// will receive one argument, the Deferred object that is related to the
// canceller.
// okHandler:
// The first OK callback to be registered with Deferred. It has the opportunity
// to transform the OK response. It will receive one argument -- the Deferred
// object returned from this function.
// errHandler:
// The first error callback to be registered with Deferred. It has the opportunity
// to do cleanup on an error. It will receive two arguments: error (the
// Error object) and dfd, the Deferred object returned from this function.
var ioArgs = {args: args, url: args.url};
//Get values from form if requestd.
var formObject = null;
if(args.form){
var form = _d.byId(args.form);
//IE requires going through getAttributeNode instead of just getAttribute in some form cases,
//so use it for all. See #2844
var actnNode = form.getAttributeNode("action");
ioArgs.url = ioArgs.url || (actnNode ? actnNode.value : null);
formObject = _d.formToObject(form);
}
// set up the query params
var miArgs = [{}];
if(formObject){
// potentially over-ride url-provided params w/ form values
miArgs.push(formObject);
}
if(args.content){
// stuff in content over-rides what's set by form
miArgs.push(args.content);
}
if(args.preventCache){
miArgs.push({"dojo.preventCache": new Date().valueOf()});
}
ioArgs.query = _d.objectToQuery(_d.mixin.apply(null, miArgs));
// .. and the real work of getting the deferred in order, etc.
ioArgs.handleAs = args.handleAs || "text";
var d = new _d.Deferred(canceller);
d.addCallbacks(okHandler, function(error){
return errHandler(error, d);
});
//Support specifying load, error and handle callback functions from the args.
//For those callbacks, the "this" object will be the args object.
//The callbacks will get the deferred result value as the
//first argument and the ioArgs object as the second argument.
var ld = args.load;
if(ld && _d.isFunction(ld)){
d.addCallback(function(value){
return ld.call(args, value, ioArgs);
});
}
var err = args.error;
if(err && _d.isFunction(err)){
d.addErrback(function(value){
return err.call(args, value, ioArgs);
});
}
var handle = args.handle;
if(handle && _d.isFunction(handle)){
d.addBoth(function(value){
return handle.call(args, value, ioArgs);
});
}
//Plug in topic publishing, if dojo.publish is loaded.
if(cfg.ioPublish && _d.publish && ioArgs.args.ioPublish !== false){
d.addCallbacks(
function(res){
_d.publish("/dojo/io/load", [d, res]);
return res;
},
function(res){
_d.publish("/dojo/io/error", [d, res]);
return res;
}
);
d.addBoth(function(res){
_d.publish("/dojo/io/done", [d, res]);
return res;
});
}
d.ioArgs = ioArgs;
// FIXME: need to wire up the xhr object's abort method to something
// analagous in the Deferred
return d;
};
var _deferredCancel = function(/*Deferred*/dfd){
// summary: canceller function for dojo._ioSetArgs call.
dfd.canceled = true;
var xhr = dfd.ioArgs.xhr;
var _at = typeof xhr.abort;
if(_at == "function" || _at == "object" || _at == "unknown"){
xhr.abort();
}
var err = dfd.ioArgs.error;
if(!err){
err = new Error("xhr cancelled");
err.dojoType="cancel";
}
return err;
};
var _deferredOk = function(/*Deferred*/dfd){
// summary: okHandler function for dojo._ioSetArgs call.
var ret = handlers[dfd.ioArgs.handleAs](dfd.ioArgs.xhr);
return ret === undefined ? null : ret;
};
var _deferError = function(/*Error*/error, /*Deferred*/dfd){
// summary: errHandler function for dojo._ioSetArgs call.
if(!dfd.ioArgs.args.failOk){
console.error(error);
}
return error;
};
// avoid setting a timer per request. It degrades performance on IE
// something fierece if we don't use unified loops.
var _inFlightIntvl = null;
var _inFlight = [];
//Use a separate count for knowing if we are starting/stopping io calls.
//Cannot use _inFlight.length since it can change at a different time than
//when we want to do this kind of test. We only want to decrement the count
//after a callback/errback has finished, since the callback/errback should be
//considered as part of finishing a request.
var _pubCount = 0;
var _checkPubCount = function(dfd){
if(_pubCount <= 0){
_pubCount = 0;
if(cfg.ioPublish && _d.publish && (!dfd || dfd && dfd.ioArgs.args.ioPublish !== false)){
_d.publish("/dojo/io/stop");
}
}
};
var _watchInFlight = function(){
//summary:
// internal method that checks each inflight XMLHttpRequest to see
// if it has completed or if the timeout situation applies.
var now = (new Date()).getTime();
// make sure sync calls stay thread safe, if this callback is called
// during a sync call and this results in another sync call before the
// first sync call ends the browser hangs
if(!_d._blockAsync){
// we need manual loop because we often modify _inFlight (and therefore 'i') while iterating
// note: the second clause is an assigment on purpose, lint may complain
for(var i = 0, tif; i < _inFlight.length && (tif = _inFlight[i]); i++){
var dfd = tif.dfd;
var func = function(){
if(!dfd || dfd.canceled || !tif.validCheck(dfd)){
_inFlight.splice(i--, 1);
_pubCount -= 1;
}else if(tif.ioCheck(dfd)){
_inFlight.splice(i--, 1);
tif.resHandle(dfd);
_pubCount -= 1;
}else if(dfd.startTime){
//did we timeout?
if(dfd.startTime + (dfd.ioArgs.args.timeout || 0) < now){
_inFlight.splice(i--, 1);
var err = new Error("timeout exceeded");
err.dojoType = "timeout";
dfd.errback(err);
//Cancel the request so the io module can do appropriate cleanup.
dfd.cancel();
_pubCount -= 1;
}
}
};
if(dojo.config.debugAtAllCosts){
func.call(this);
}else{
try{
func.call(this);
}catch(e){
dfd.errback(e);
}
}
}
}
_checkPubCount(dfd);
if(!_inFlight.length){
clearInterval(_inFlightIntvl);
_inFlightIntvl = null;
return;
}
};
dojo._ioCancelAll = function(){
//summary: Cancels all pending IO requests, regardless of IO type
//(xhr, script, iframe).
try{
_d.forEach(_inFlight, function(i){
try{
i.dfd.cancel();
}catch(e){/*squelch*/}
});
}catch(e){/*squelch*/}
};
//Automatically call cancel all io calls on unload
//in IE for trac issue #2357.
//>>excludeStart("webkitMobile", kwArgs.webkitMobile);
if(_d.isIE){
_d.addOnWindowUnload(_d._ioCancelAll);
}
//>>excludeEnd("webkitMobile");
_d._ioNotifyStart = function(/*Deferred*/dfd){
// summary:
// If dojo.publish is available, publish topics
// about the start of a request queue and/or the
// the beginning of request.
// description:
// Used by IO transports. An IO transport should
// call this method before making the network connection.
if(cfg.ioPublish && _d.publish && dfd.ioArgs.args.ioPublish !== false){
if(!_pubCount){
_d.publish("/dojo/io/start");
}
_pubCount += 1;
_d.publish("/dojo/io/send", [dfd]);
}
};
_d._ioWatch = function(dfd, validCheck, ioCheck, resHandle){
// summary:
// Watches the io request represented by dfd to see if it completes.
// dfd: Deferred
// The Deferred object to watch.
// validCheck: Function
// Function used to check if the IO request is still valid. Gets the dfd
// object as its only argument.
// ioCheck: Function
// Function used to check if basic IO call worked. Gets the dfd
// object as its only argument.
// resHandle: Function
// Function used to process response. Gets the dfd
// object as its only argument.
var args = dfd.ioArgs.args;
if(args.timeout){
dfd.startTime = (new Date()).getTime();
}
_inFlight.push({dfd: dfd, validCheck: validCheck, ioCheck: ioCheck, resHandle: resHandle});
if(!_inFlightIntvl){
_inFlightIntvl = setInterval(_watchInFlight, 50);
}
// handle sync requests
//A weakness: async calls in flight
//could have their handlers called as part of the
//_watchInFlight call, before the sync's callbacks
// are called.
if(args.sync){
_watchInFlight();
}
};
var _defaultContentType = "application/x-www-form-urlencoded";
var _validCheck = function(/*Deferred*/dfd){
return dfd.ioArgs.xhr.readyState; //boolean
};
var _ioCheck = function(/*Deferred*/dfd){
return 4 == dfd.ioArgs.xhr.readyState; //boolean
};
var _resHandle = function(/*Deferred*/dfd){
var xhr = dfd.ioArgs.xhr;
if(_d._isDocumentOk(xhr)){
dfd.callback(dfd);
}else{
var err = new Error("Unable to load " + dfd.ioArgs.url + " status:" + xhr.status);
err.status = xhr.status;
err.responseText = xhr.responseText;
dfd.errback(err);
}
};
dojo._ioAddQueryToUrl = function(/*dojo.__IoCallbackArgs*/ioArgs){
//summary: Adds query params discovered by the io deferred construction to the URL.
//Only use this for operations which are fundamentally GET-type operations.
if(ioArgs.query.length){
ioArgs.url += (ioArgs.url.indexOf("?") == -1 ? "?" : "&") + ioArgs.query;
ioArgs.query = null;
}
};
dojo.declare("dojo.__XhrArgs", dojo.__IoArgs, {
constructor: function(){
// summary:
// In addition to the properties listed for the dojo._IoArgs type,
// the following properties are allowed for dojo.xhr* methods.
// handleAs: String?
// Acceptable values are: text (default), json, json-comment-optional,
// json-comment-filtered, javascript, xml. See `dojo.contentHandlers`
// sync: Boolean?
// false is default. Indicates whether the request should
// be a synchronous (blocking) request.
// headers: Object?
// Additional HTTP headers to send in the request.
// failOk: Boolean?
// false is default. Indicates whether a request should be
// allowed to fail (and therefore no console error message in
// the event of a failure)
this.handleAs = handleAs;
this.sync = sync;
this.headers = headers;
this.failOk = failOk;
}
});
dojo.xhr = function(/*String*/ method, /*dojo.__XhrArgs*/ args, /*Boolean?*/ hasBody){
// summary:
// Sends an HTTP request with the given method.
// description:
// Sends an HTTP request with the given method.
// See also dojo.xhrGet(), xhrPost(), xhrPut() and dojo.xhrDelete() for shortcuts
// for those HTTP methods. There are also methods for "raw" PUT and POST methods
// via dojo.rawXhrPut() and dojo.rawXhrPost() respectively.
// method:
// HTTP method to be used, such as GET, POST, PUT, DELETE. Should be uppercase.
// hasBody:
// If the request has an HTTP body, then pass true for hasBody.
//Make the Deferred object for this xhr request.
var dfd = _d._ioSetArgs(args, _deferredCancel, _deferredOk, _deferError);
var ioArgs = dfd.ioArgs;
//Pass the args to _xhrObj, to allow alternate XHR calls based specific calls, like
//the one used for iframe proxies.
var xhr = ioArgs.xhr = _d._xhrObj(ioArgs.args);
//If XHR factory fails, cancel the deferred.
if(!xhr){
dfd.cancel();
return dfd;
}
//Allow for specifying the HTTP body completely.
if("postData" in args){
ioArgs.query = args.postData;
}else if("putData" in args){
ioArgs.query = args.putData;
}else if("rawBody" in args){
ioArgs.query = args.rawBody;
}else if((arguments.length > 2 && !hasBody) || "POST|PUT".indexOf(method.toUpperCase()) == -1){
//Check for hasBody being passed. If no hasBody,
//then only append query string if not a POST or PUT request.
_d._ioAddQueryToUrl(ioArgs);
}
// IE 6 is a steaming pile. It won't let you call apply() on the native function (xhr.open).
// workaround for IE6's apply() "issues"
xhr.open(method, ioArgs.url, args.sync !== true, args.user || undefined, args.password || undefined);
if(args.headers){
for(var hdr in args.headers){
if(hdr.toLowerCase() === "content-type" && !args.contentType){
args.contentType = args.headers[hdr];
}else if(args.headers[hdr]){
//Only add header if it has a value. This allows for instnace, skipping
//insertion of X-Requested-With by specifying empty value.
xhr.setRequestHeader(hdr, args.headers[hdr]);
}
}
}
// FIXME: is this appropriate for all content types?
xhr.setRequestHeader("Content-Type", args.contentType || _defaultContentType);
if(!args.headers || !("X-Requested-With" in args.headers)){
xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
}
// FIXME: set other headers here!
_d._ioNotifyStart(dfd);
if(dojo.config.debugAtAllCosts){
xhr.send(ioArgs.query);
}else{
try{
xhr.send(ioArgs.query);
}catch(e){
ioArgs.error = e;
dfd.cancel();
}
}
_d._ioWatch(dfd, _validCheck, _ioCheck, _resHandle);
xhr = null;
return dfd; // dojo.Deferred