jQuery实现跨域iframe接口方法调用

复制代码 代码如下:


(function(global){
  global.Cross = {
    signalHandler: {},
    on: function(signal, func){
      this.signalHandler[signal] = func;
    },
    call: function(win, domain, signal, data, callbackfunc){
      var notice = {"signal": signal, "data": data};
      if(!!callbackfunc){
          notice["callback"] = "callback_" + new Date().getTime();
          Cross.on(notice["callback"], callbackfunc);
      }
      var noticeStr = JSON.stringify(notice);
      win.postMessage(noticeStr, domain);
    }
  };
  $(window).on("message", function(e) {
    var realEvent = e.originalEvent,
        data = realEvent.data,
        swin = realEvent.source,
        origin = realEvent.origin,
        protocol;
    try {
        protocol = JSON.parse(data);
        var result = global.Cross.signalHandler[protocol.signal].call(null, protocol.data);
        if(!!protocol["callback"]){
          Cross.call(swin, origin, protocol["callback"], {result: result});
        }
        if(/^callback_/.test(protocol.signal)){
          delete Cross.signalHandler[protocol.signal];
        }
    } catch (e) {
      console.log(e);
      throw new Error("cross error.");
    }
  });
})(window);

a.html

复制代码 代码如下:


<!doctype HTML>
<html>
  <head>
    <script src="https://www.jb51.net/jquery-1.8.3.min.js"></script>
    <script src="https://www.jb51.net/cross.js"></script>
    <script>
      function call_b(){
        var ifw = $("#ifr")[0].contentWindow;
        //调用iframe子页面的公开的test接口, 子页面域名为:8088
        Cross.call(ifw,":8088","test",{t: $("#txt").val()});
      }
    </script>
  </head>
  <body>
    <input type="text"/>
    <button>call</button>
    <iframe src=":8088/b.html"></iframe>
  </body>
</html>

b.html

复制代码 代码如下:


<!doctype HTML>
<html>
  <head>
    <script src="https://www.jb51.net/jquery-1.8.3.min.js"></script>
    <script src="https://www.jb51.net/cross.js"></script>
    <script>
    //对外公开一个接口命名为test
    Cross.on("test", function(data){
      alert(data.t);
    });
    </script>
  </head>
  <body>
  </body>
</html>

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