Ajax Cross-Domain workarounds

Cross-Domain Post

(function ($) {Window.isie6=$.browser.msie && jquery.browser.version==6.0;jquery.extend ({ajaxformnums:0, Ajaxformpost:function (sURL, datas, callback,domains) {/*[surl= submit address, datas= to submit data to image, callback= callback, domain= domain]*/domains= domains| | ' 51.com '; var on= ' temp_post_ ' +$.ajaxformnums;var of=[];of.push (' <div id= ' ' +on+ ' _div "style=" Position:absolute; z-index:10;top:-20000100px; " ><iframe id= "' +on+ ' _iframe" name= "' +on+ ' _iframe" height= "1" width= "1" src= "Http://friend.51.com/ajax_ Blank.php?d= ' +encodeuricomponent (domains) + ' "frameborder=" 0 "border=" 0 "scrolling=" no "></iframe><form Id= "' +on+ ' _form" name= "' +on+ ' _form" method= "post" action= "' +surl+ '" target= "' +on+ ' _iframe ' > '); $.each (Datas, function (i,n) {Of.push (' <textarea name= ' +i+ ' "style=" width:1px;height:1px; " > ' +n+ ' </textarea> ');}); O F.push (' <input type= ' submit "value=" Submit "Name=" B1 "style=" WIDTH:1PX;HEIGHT:1PX;/></form></div > '), $ (document.body). Append (Of.join ("))//.insertadjacenthtml (" BeforeEnd ", Of.join (')),//document.body.insertadjacenthtml (" BeforeEnd ", Of.join (") "), of=null;$ (' # ' +on+ ' _iframe '). Bind (' Load ', function () {if (!$ (this). attr (' summary ')} {$ (this). attr (' summary ', 1); $ (' # ' +on+ ' _form '). Submit (); return false;} if (isIE6) {if ($.isfunction (CallBack)) {callBack (window.name);} Else{eval (callback+ ' (window.name) ');}} Else{var oif= this.id;if ($.isfunction (callBack)) {if (Navigator.userAgent.toLowerCase (). IndexOf (' se 2.x ') >-1) { CallBack (Frames[oif].document.body.innertext);} Else{callback (frames[oif].document.body.innerhtml);}} Else{eval (callback+ ' (frames[oif].document.body.innerhtml) ');}} Window.settimeout (function () {$ (' # ' +on+ ' _div '). Remove ();},1);}); ($.ajaxformnums++;});}) (JQuery);

Call Mode:

$.ajaxformpost (' Http://localhost/api.php?act=say ', {Cont:cont}, function (data) {  alert (data);  });

Build a file in the root directory of the Web ajax_blank.php
The contents are:

and add JS on the called page:

document.domain= ' 51.com ';


PHP section

$result =-1;  echo "<script>if (!/msie 6/i.test (navigator.useragent)) {document.domain= ' 51.com ';} Else{parent.name= ' $result ';} </script> $result ";

Cross-domain  get

$.getjson ("http://localhost/api.php?callback=", {receiver:receiver},function (data) {  alert (data.info);  })

PHP Processing Section: 

$ret [' info '] = iconv ("GBK", "UTF-8", "No user exists");  $result = Json_encode ($ret);  echo Request_check ($_get[' callback '). ' ('. $result. ') ';  $_get[' callback '] need to handle, prevent RSS attack  function Request_check ($post) {          if (!GET_MAGIC_QUOTES_GPC ())    //Judge Magic _QUOTES_GPC is open          {          $post = addslashes ($post);    The MAGIC_QUOTES_GPC does not open the filter for the submitted data          }          //$post = Str_replace ("_", "\_", $post);    Filter out the ' _ '          //$post = Str_replace ("%", "\%", $post);    Filter out the '% '          $post = NL2BR ($post);    Enter conversion          $post = Htmlspecialchars ($post, ent_quotes);    HTML tags convert             return $post;  }

IE6 JSONP return non-implementation of the workaround
In PHP return header plus

Header (' Cache-control:no-cache; ');  Header (' Content-encoding:plain ');

In addition, the JS trigger button plus return false; solve the Ajax interrupt problem under IE6
Ajax submitted data are UTF8 format, PHP is generally used iconv ("Utf-8", "Gbk//ignore", $str) or mb_convert_encoding ($value, ' gbk ', ' utf-8 ') to convert, And when encountered with the Martian text, such as: ♡ jingle. Jingle Bells. Merry christmas! ♡, the former will remove the special characters, the latter special characters will become question marks, so the use of Ajaxformpost submission method does not need to encode the conversion

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