Code for Ajax cross-origin proxy access to network resources

Smart. asp Copy codeThe Code is as follows: <script language = "jscript" runat = "server">
/*
Call method in VBS
Dim myhttp
Set myhttp = SmartHttp (url, method, data); // all three parameters are optional.
Attribute:
Url: String, the requested URL
Method: String, REQUEST method
Data: String, request data
Charset: String, the encoding of the data returned by the request URL
Status: Int, status code returned by the request
ReadyState: Int, the current communication status of the same HTTP request, 1, 2, 3, 4
Dataset: Object: the requested data. If it is added, the data will be appended to the data attribute.
Dataset attributes:
Charset: String, encoding of sent data
Dataset method:
Append (key, value, noencode): add data
Remove (key): remove a data item
Isexists (key): determines whether a data item exists.
Clear: clear all data items
Method:
Header (headstr): sets the request header. Separate the items and values:
Timeout (t1, t2, t3, t4): sets the timeout time.
Send (): send a request
Getbinary: Get the binary data returned by the server
Gettext (charset): Get the text of the specified Encoding
Getjson (charset): obtains the json data of the specified encoding.
Getheader (key): Get the Response Header returned by the server
Getxml (charset): Get the xml data of the specified Encoding
*/
Function SmartHttp (url, method, data ){
Return new _ SmartHttp (url, method, data );
}

Function _ SmartHttp (url, method, data ){
If (typeof method = "undefined") method = "GET ";
If (typeof data = "undefined") data = "";
Method = method. toUpperCase ();
Method = method! = "POST "? "GET": "POST ";
This. timeout = [hour, 10000, hour, 10000];
This. method = method;
This. url = url;
This. data = data;
This. charset = "gb2312 ";
This. http = null;
This. headers = [];
This. status = 0;
This. readyState = 0;
This. content = null;
This. msg = "";
This. dataset = {
Charset: "gb2312 ",
Data: [],
Append: function (key, value, noencode ){
Var fn = null;
If (this. charset. toLowerCase () = "UTF-8") {fn = encodeURIComponent;} else {fn = escape ;}
If (noencode = true) {fn = function (_ str) {return _ str ;}}
This. data. push ({"key": fn (key), "value": fn (value )});
},
Remove: function (key ){
If (this. data. length <= 0) return false;
Var _ data = [];
For (var I = 0; I <this. data. length; I ++ ){
If (this. data [I]. key! = Key ){
_ Data. push (this. data [I]);
}
}
This. data = _ data;
},
Isexists: function (key ){
If (this. data. length <= 0) return false;
For (var I = 0; I <this. data. length; I ++ ){
If (this. data [I]. key = key ){
Return true;
}
}
Return false;
},
Clear: function (){
This. dataset. data = [];
}
};
}

_ SmartHttp. prototype. init = function (){
Var datasetstr = "";
If (this. dataset. data. length> 0 ){
For (var I = 0; I <this. dataset. data. length; I ++ ){
Datasetstr + = this. dataset. data [I]. key + "=" + this. dataset. data [I]. value + "&";
}
}
If (datasetstr! = "") Datasetstr = datasetstr. substr (0, datasetstr. length-1 );
If (this. data = "") {this. data = datasetstr;} else {if (datasetstr! = "") This. data + = "&" + datasetstr ;}
If (this. data = "") this. data = null;
// This. url + = (this. url. indexOf ("? ") <0 )? "? ":" & ") +" Jornd = "+ this. getrnd ();
If (this. method = "GET" & this. data! = Null) this. url + = "&" + this. data;
If (this. method = "POST") this. headers. push ("Content-Type: application/x-www-form-urlencoded ");
If (! This. charset | this. charset = "") this. charset = "gb2312 ";
};

_ SmartHttp. prototype. header = function (headstr ){
If (headstr. indexOf (":")> = 0) this. headers. push (headstr );
Return this;
};

_ SmartHttp. prototype. timeout = function (){
If (arguments. length> 4) {return this ;}
For (var I = 0; I <arguments. length; I ++ ){
If (! IsNaN (arguments [I]) {
This. timeout [I] = parseInt (arguments [I]);
}
}
Return this;
};

_ SmartHttp. prototype. send = function (){
This. init ();
Var _ http = this. getobj ();
If (_ http = null) {return this ;}
Try {
_ Http. setTimeouts (this. timeout [0], this. timeout [1], this. timeout [2], this. timeout [3]);
} Catch (ex ){}
_ Http. open (this. method, this. url, false );
If (this. headers. length> 0 ){
For (var I = 0; I <this. headers. length; I ++ ){
Var Sindex = this. headers [I]. indexOf (":");
Var key = this. headers [I]. substr (0, Sindex );
Var value = this. headers [I]. substr (Sindex + 1 );
_ Http. setRequestHeader (key, value );
}
}
_ Http. send (this. data );
This. readyState = _ http. readyState;
If (_ http. readyState = 4 ){
This. status = parseInt (_ http. status );
This. http = _ http;
This. content = _ http. responseBody;
}
Return this;
}

_ SmartHttp. prototype. getbinary = function (){
Return this. content;
};

_ SmartHttp. prototype. gettext = function (charset ){
Try {
Return this. b2s (this. content, charset? Charset: this. charset );
} Catch (ex ){
This. msg = ex. description;
Return "";
}
};

_ SmartHttp. prototype. getjson = function (charset ){
Try {
Var _ json = null;
Eval ("_ json = (" + this. gettext (charset) + ");");
Return _ json;
} Catch (ex ){
This. msg = ex. description;
Return null;
}
};

_ SmartHttp. prototype. getheader = function (key ){
If (key ){
If (key. toUpperCase () = "SET-COOKIE "){
Key = key. replace ("-","\-");
Var headers = this. http. getAllResponseHeaders ();
Var regexp = new RegExp ("\ n" + key + "\ :(. + ?) \ R "," ig ");
Var resstr = "";
While (res = regexp.exe c (headers ))! = Null ){
Var val = res [1]. trim ();
Resstr = resstr + val. substr (0, val. indexOf (";") + ";"
}
If (resstr! = ""){
Resstr = resstr. substr (0, resstr. lastIndexOf (";"));
}
Return resstr;
} Else {
Return this. http. getResponseHeader (key );
}
} Else {return this. http. getAllResponseHeaders ();}
};

_ SmartHttp. prototype. getxml = function (charset ){
Try {
Var _ dom = new ActiveXObject ("MSXML2.DOMDocument ");
_ Dom. loadXML (this. gettext (charset ));
Return _ dom;
} Catch (ex ){
This. msg = ex. description;
Return null;
}
};
_ SmartHttp. prototype. getobj = function (){
Var B = null;
Var httplist = ["MSXML2.serverXMLHttp. 3.0", "MSXML2.serverXMLHttp", "MSXML2.XMLHttp. 3.0", "MSXML2.XMLHttp", "Microsoft. XMLHttp"];
For (var I = 0; I <= httplist. length-1; I ++ ){
Try {
B = new ActiveXObject (httplist [I]);
(Function (o ){
_ SmartHttp. prototype. getobj = function () {return new ActiveXObject (o )};
}) (Httplist [I]);
Return B;
} Catch (ex ){
Eval ("this. msg = ex. description ;");
}
}
Return B;
};

_ SmartHttp. prototype. getrnd = function () {return Math. random (). toString (). substr (2 );};

_ SmartHttp. prototype. b2s = function (bytSource, Cset) {// ef bb bf, c0 fd
Var Objstream, c1, c2, c3;
Var byts;
Objstream = Server. CreateObject ("ADODB. Stream ");
Objstream. Type = 1;
Objstream. Mode = 3;
Objstream. Open ();
Objstream. Write (bytSource );
Objstream. Position = 0;
Objstream. Type = 2;
Objstream. CharSet = Cset;
Byts = Objstream. ReadText ();
Objstream. Close ();
Objstream = null;
Return byts;
};
_ SmartHttp. prototype. urlencode = function (str) {return encodeURIComponent (str );};
_ SmartHttp. prototype. urldecode = function (str) {return decodeURIComponent (str );};
String. prototype. trim = function () {return this. replace (/(^ (\ s +) | (\ s +) $)/igm ,"");};
</Script>

Code:Copy codeThe Code is as follows: <! -- # Include file = "smart. asp" -->
<%
Response. charset = "UTF-8"
Dim url, method, data, charset
Url = Request. Form ("targeturl ")
Method = Request. Form ("method ")
Data = Request. Form ("data ")
Charset = Request. Form ("charset ")
If charset = "" then charset = "GB2312"
Response. Write SmartHttp (url, method, data). send (). gettext (charset)
Set myhttp = nothing
%>

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