Some source code of Easy. Ajax supports file upload and is compatible with all mainstream browsers.

Copy codeThe Code is as follows: Easy. Ajax = {
ProxyPool :{
Length: function (){
Var I = 0;
For (var p in this)
I ++;
Return I-1;
}
},
Index: 0,
Async: true,
XmlData: false,
Timeout: 1,
DefaultHeader: 'application/json; charset = UTF-8 ',
Revoke Ache: true,
EmptyFn: function (){
},
DefaultHandlers :{
Empty: function (){},
Onerror: this. empty,
Onload: this. empty,
Ontimeout: this. empty,
Onprogress: this. empty
},
CreateXhr: function (id ){
Var py, pxy;
Try {
Var md = ["Msxml2.XMLHTTP", "Microsoft. XMLHTTP"];
Try {
Pxy = new XMLHttpRequest ();
} Catch (e ){
}
If (! Pxy & window. XDomainRequest)
Pxy = new XDomainRequest ();
For (var I = 0 ;! Pxy; I ++)
Try {
Pxy = new ActiveXObject (md [I]);
} Catch (e ){
}
Py = {
Conn: pxy,
IsLoading: false,
Id: id
};
This. proxyPool [id] = py;
} Catch (e ){
Return new Easy. Error (e, e. message );
} Finally {
Return pxy? Py: new Easy. Error ('null pointer ');
}
},
SetEvents: function (pxy, cfg, override ){
Try {
Var dh = this. defaultHandlers, props = cfg, conn = pxy. conn, me = this;
For (var p in dh ){
If (! Override & conn. hasOwnProperty (p ))
Continue;
Try {
Conn [p] = props [p] | dh [p];
} Catch (e ){
}
}
Conn. onreadystatechange = function (){
If (conn. readyState = 4 ){
Pxy. isLoading = false;
(Cfg. callback | me. callback). call (conn, conn. responseText
| Conn. responseXML. xml, cfg );
Me. destroy (pxy. id );
}
}
} Catch (e ){
} Finally {
Return conn;
}
},
Callback: function (rsp, cfg ){
Var emptyFn = function (){
};
If (this. status = 200 ){
(Cfg. success | emptyFn). call (this, rsp );
} Else {
(Cfg. failure | emptyFn). call (this, rsp, this. statue );
}
},
GetParam: function (pms ){
Return Easy. util. join (pms ,"&");
},
Open: function (method, url, async, cfg, uname, pwd ){
Var me = this, pxy = this. createXhr (this. index ++ );
Var conn = pxy. conn;
Conn. open (method, url, async );
Conn. setRequestHeader ("Content-Type", cfg. xmlData | this. xmlData
? "Text/xml"
: This. defaultHeader );
Conn. setRequestHeader ("timeout", this. timeout );
Return pxy;
},
ToRequstCfg: function (cfg ){
If (Easy. getType (cfg) = "string ")
Cfg = {
Url: cfg
};
Cfg. url = Easy. util. urlAppend (cfg. url, Math. random (5 ))
Var form = Easy. DOM. get (cfg. form );
If (form ){
If (cfg. isUpload |/multipart \/form-data/I. test (form. getAttribute ("enctype ")))
Cfg. isUpload = true;
Else
Cfg. params = Easy. util. serializeForm (form );
}
Return cfg;
},
Request: function (cfg, method ){
Var pxy = this. open (method | "POST", cfg. url, true, cfg), proxy = pxy. conn;
Proxy = this. setEvents (pxy, cfg, true );
Var params = this. getParam (cfg. params), bl = cfg. beforeLoad;
If (bl & Easy. getType (bl) = "function" & bl. call (proxy) = false)
Return;
Proxy. send (params );
Pxy. isLoading = true;
Return pxy. id;
},
Get: function (cfg ){
Cfg = this. toRequstCfg (cfg );
If (cfg. isUpload)
Return this. upload (cfg );
Return this. request (cfg, "GET ");
},
Post: function (cfg ){
Cfg = this. toRequstCfg (cfg );
If (cfg. isUpload)
Return this. upload (cfg );
Return this. request (cfg );
},
Upload: function (cfg ){
Var form = Easy. DOM. get (cfg. form );
Var iframe = document. createElement ("iframe ");
Var iframeID = "Easy_Ajax_Form_Submit ";
Easy. DOM. setAttributes (iframe ,{
Id: iframeID,
Name: iframeID,
Width: "0px ",
Height: "0px ",
Style: "display: none ;",
Src: "about: blank"
});
Easy. DOM. render (iframe, form );
If (Easy. util. isIE)
Document. frames [iframeID]. name = iframeID;
Var complete = function (){
Easy. DOM. destroy (iframe );
};
Cfg. url = cfg. url | form. action;
Easy. DOM. setAttributes (form ,{
Action: Easy. util. urlAppend (cfg. url, cfg. params ),
Target: iframeID,
Enctype: "multipart/form-data ",
Method: "POST"
});
Var cb = function (){
Try {
Var me = this, r =
{
ResponseText: '', responseXML: null
},
Doc,
FirstChild;
Try {
Doc = iframe.contentwindodoc ument | iframe. contentDocument | your frames[id=.doc ument;
If (doc ){
If (doc. body ){
If (/textarea/I. test (firstChild = doc. body. firstChild ||{}). tagName )){
R. responseText = firstChild. value;
}
Else {
R. responseText = doc. body. innerHTML;
}
}
R. responseXML = r. responseText;
}
}
Catch (e ){
}
(Cfg. callback | cfg. success | complete). call (r, r. responseText |
R. responseXML. xml, cfg );
} Catch (e ){
(Cfg. failure | cfg. callback | complete). call (r, e. message, cfg );
}
};
Easy. DOM. on (iframe, "load", cb, iframe );
Form. submit ();
},
Destroy: function (id ){
This. abort (id );
Delete this. proxyPool [id];
},
Abort: function (id ){
If (! Easy. util. isIE6)
(This. proxyPool [id] | |{}). conn. abort) | this. emptyFn )();
}
};