实现跨域iframe接口方法调用简单介绍

2023-12-04 13:48:33 前端笔记 107

页面a.html域名为，嵌入页面/b.html.

b.html要调用a.html中的js函数，由于两个页面不在一个域中，会提示没权限。

下面就介绍一下如何如何解决此问题，需要的朋友可以做一下参考。

一.cross.js代码:

(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);

二.a.html代码:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="/" />
<title>实例</title>
<script src="jquery-1.8.3.min.js"></script>
<script src="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localhost:8088
  Cross.call(ifw,"localhost:8088","test",{t: $("#txt").val()});
}
</script>
</head>
<body>
<input id="txt" type="text"/>
<button>call</button>
<iframe id="ifr" src="localhost:8088/b.html"></iframe>
</body>
</html>

三.b.html代码:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="/" />
<title>实例</title>
<script src="jquery-1.8.3.min.js"></script>
<script src="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>