Jquery jsonp cross-Origin

Initiate jsonp request pageCode

 <!  Doctype html  > 
 <  Html  > 
 <  Head  > 
 <  Meta  Charset  = "UTF-8"  > 
<  Title  > Insert title here </  Title  > 
 <  Script  SRC  = "Http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"  > </  Script  > 
 </  Head > 
 <  Body  > 
 <  Script  >  
$. Ajax ({
  //  Async: false, // use synchronous requests  
  Type:  ' Get  '  ,
URL:  '  Http: // 127.0.0.1: 8090/outapp/jsonp  '  ,
Datatype:  '  Jsonp  '  , //  Select Return Value Type  
  Jsonp:  "  Callback  "  ,  //  Specifies the sending/receiving parameters. The default value is callback.  
 Timeout:  30000  ,
Error:  Function  (Jqxhr, textstatus, errorthrown ){
  If  (Textstatus  =  "  Timeout  " ){
Alert (  '  Sorry! Request timeout. Please try again! Or check your network conditions!  '  );  Return   False  ;
}  Else   If  (Textstatus =  "  Error  "  |  Textstatus  =  "  Parsererror  "  ){
Alert (  ' Sorry! System error. Please try again!  '  );  Return   False  ;
}  Else   If  (Textstatus  =  " Abort  "  ){
Alert (  '  Sorry!ProgramInterrupted. Please try again!  '  );  Return   False  ;
}
},
Success: Function  (MSG ){
  If  (  ''   ! =  MSG ){
Alert (msg. aa );
}  Else  {
Alert (  '  The file does not exist! '  );
}
}
});
  </  Script  > 
 </  Body  > 
 </  Html  > 

Code of the Cross-origin request page

$ Callback=$ _ Get['Callback'];
Echo $ Callback. '({"Jsonp": false, "AA": "callbackname "})';
 

Obviously: the format of page return values required by jsonp is callback (JSON string );

Double quotation marks of JSON strings are recommended to avoid unexpected errors.

The output result of the corresponding final page may be (the callback value has a timestamp and will change): jquery17109581847573505305_1321_5230871 ({"jsonp": false, "AA": "callbackname "})