获取 iframe 的源代码

Question

无论如何要获取 iframe 加载的页面的源代码？ 我不想更改任何代码，我只想阅读它。 我还需要能够使用 javascript/html 来获取它。

Answer 1

document.getElementById('iframeID').contentWindow.document.body.innerHTML

适用于 Firefox、Chrome、Opera、IE9 beta

Answer 2

试试这样：

<!DOCTYPE html>
<html>
<body>

//this is iframe I ll look for its source
<iframe id="frmin" src="http://www.w3schools.com"></iframe>

<p>Click the button to see the source.</p>
//this is display I will display Iframe's source here
<div id="srcout"></div>

//show source upon click event
<button onclick="myFunction()">Show it</button>

<script>
function myFunction() {
//get Iframe element ready for javascript manipulation
var frm = document.getElementById("frmin");
//get display element ready for javascript manipulation
var dsp = document.getElementById("srcout");

//find Iframe's HTML (root) element, [0] because I'm using getElementsByTagName which returns node list so I have to chose the 1st one, and put its outer content (i.e. with outer tags) to display, i.e. dsp.innerText. I use innerText because I want a text output not formatted as html.
dsp.innerText = frm.contentDocument.getElementsByTagName('html')[0].outerHTML;

}
</script>

</body> 
</html>

Answer 3

我知道这看起来很复杂，但我为您提供了一种 100% 防弹的方法，可以在您的页面上查看您的源代码。 我不完全知道如何在 iframe 中显示它，但是还有另一种查看源代码的方法，它比 iframe 好得多，这就是方法。

重要的是 JavaScript，而 HTML 正是如此。

CSS：在<head></head>部分：

<style type="text/css" >
.button
    {
    background:#000cff;
    padding:2px 10px;
    color:white;
    text-decoration:none;
    -moz-border-radius:10px;
    -webkit-border-radius:10px;
    border-radius:10px;
    cursor: pointer;
    font-weight: bold;
    color: white;
    display: inline-block;
    box-shadow: 0 0 3px gray;
    margin: 0px;
    font: bold 11px Arial, Sans-Serif;
    }

#source-code
    {
    display:none;
    position:absolute;
    top:-24px;
    left:0;
    width:100%;
    height:414px;
    background:rgba(255,255,255,0.0);
    }

#source-code:target { display: block; }
#source-code pre
    {
    padding:20px;
    font:14px/1.6 Monaco, Courier, MonoSpace;
    margin:50px auto;
    background:rgba(0,0,0,0.8);
    color:white;
    width:80%;
    height:80%;
    overflow:auto;
    }

#source-code pre a,
#source-code pre a span
    {
    text-decoration:none;
    color:#00ccff !important;
    }

#x
    {
    position:absolute;
    top:30px;
    left:10%;
    margin-left:-41px;
    }

.control-copytextarea
    {
    position:absolute;
    top:-3px;
    left:20px;
    cursor: pointer;
    font-weight: bold;
    padding:3px 10px;
    border-radius: 5px 5px 0 0;
    background: darkred;
    color: white;
    display: inline-block;
    box-shadow: 0 0 3px gray;
    margin: 0px;
    font: bold 10px Arial, Sans-Serif;
    }
</style>

JavaScript：

<script languade="JavaScript">
        $(function() {
            $("<pre />", {
                "html":   '&lt;!DOCTYPE html>\n&lt;html>\n' + 
                        $("html")
                            .html()
                            .replace(/[<>]/g, function(m) { return {'<':'&lt;','>':'&gt;'}[m]})
                            .replace(/((ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?)/gi,'<a href="$1">$1</a>') + 
                        '\n&lt;/html>',
                "class": "prettyprint"
            }).appendTo("#source-code");

            prettyPrint();
        });
</script>

<script languade="JavaScript">
        var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
        document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
</script>

<script languade="JavaScript">
        var pageTracker = _gat._getTracker("UA-68528-29");
        pageTracker._initData();
        pageTracker._trackPageview();
</script>

注意：您不需要在线使用这些 JavaScript 代码，但为了使其在所有浏览器上都能正常工作，建议您也使用它们。

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script src="http://css-tricks.com/examples/ViewSourceButton/prettify/prettify.js"></script>

HTML：在<body></body>部分：

<a class="button" href="#source-code" id="view-source">Show the Source Code for this page</a>
<div id="source-code" align="left">
    <a href="#" id="x"><input type="button" alt="close" class="control-copytextarea" value=" Close Source Code Viewing " /></a>
</div>

注意：您可以直接将代码复制并粘贴到您的网页，它将完全按照原样工作。

完整示例：

<html>
  <head><title>View your Source Code</title>

<style type="text/css" >
.button
    {
    background:#000cff;
    padding:2px 10px;
    color:white;
    text-decoration:none;
    -moz-border-radius:10px;
    -webkit-border-radius:10px;
    border-radius:10px;
    cursor: pointer;
    font-weight: bold;
    color: white;
    display: inline-block;
    box-shadow: 0 0 3px gray;
    margin: 0px;
    font: bold 11px Arial, Sans-Serif;
    }

#source-code
    {
    display:none;
    position:absolute;
    top:-24px;
    left:0;
    width:100%;
    height:414px;
    background:rgba(255,255,255,0.0);
    }

#source-code:target { display: block; }
#source-code pre
    {
    padding:20px;
    font:14px/1.6 Monaco, Courier, MonoSpace;
    margin:50px auto;
    background:rgba(0,0,0,0.8);
    color:white;
    width:80%;
    height:80%;
    overflow:auto;
    }

#source-code pre a,
#source-code pre a span
    {
    text-decoration:none;
    color:#00ccff !important;
    }

#x
    {
    position:absolute;
    top:30px;
    left:10%;
    margin-left:-41px;
    }

.control-copytextarea
    {
    position:absolute;
    top:-3px;
    left:20px;
    cursor: pointer;
    font-weight: bold;
    padding:3px 10px;
    border-radius: 5px 5px 0 0;
    background: darkred;
    color: white;
    display: inline-block;
    box-shadow: 0 0 3px gray;
    margin: 0px;
    font: bold 10px Arial, Sans-Serif;
    }
</style>

<script languade="JavaScript">
        $(function() {
            $("<pre />", {
                "html":   '&lt;!DOCTYPE html>\n&lt;html>\n' + 
                        $("html")
                            .html()
                            .replace(/[<>]/g, function(m) { return {'<':'&lt;','>':'&gt;'}[m]})
                            .replace(/((ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?)/gi,'<a href="$1">$1</a>') + 
                        '\n&lt;/html>',
                "class": "prettyprint"
            }).appendTo("#source-code");

            prettyPrint();
        });
</script>

<script languade="JavaScript">
        var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
        document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
</script>

<script languade="JavaScript">
        var pageTracker = _gat._getTracker("UA-68528-29");
        pageTracker._initData();
        pageTracker._trackPageview();
</script>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
    <script src="http://css-tricks.com/examples/ViewSourceButton/prettify/prettify.js"></script>

  </head>
<body>



<a class="button" href="#source-code" id="view-source">Show the Source Code for this page</a>
<div id="source-code" align="left">
    <a href="#" id="x"><input type="button" alt="close" class="control-copytextarea" value=" Close Source Code Viewing " /></a>
</div>


  </body>
</html>

Answer 4

    <html>
      <head>
<title>source code viewer</title>
 <meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1.0">
<script src="https://CodeMirror.net/addon/hint/anyword-hint.js" id="anyword"></script>
<link rel="stylesheet" href="https://CodeMirror.net/lib/codemirror.css">
<link rel="stylesheet" href="https://CodeMirror.net/theme/DE.css">
<link rel="stylesheet" href="https://CodeMirror.net/addon/hint/show-hint.css">
<link rel="stylesheet" href="https://CodeMirror.net/addon/dialog/dialog.css">
<link rel="stylesheet" href="https://CodeMirror.net/addon/search/matchesonscrollbar.css">
<script src="https://CodeMirror.net/lib/codemirror.js"></script>
<script src="https://CodeMirror.net/addon/edit/closetag.js"></script>
<script src="https://CodeMirror.net/addon/hint/show-hint.js"></script>
<script src="https://CodeMirror.net/addon/hint/sql-hint.js"></script>
 <script src="https://CodeMirror.net/addon/mode/loadmode.js"></script>
<script src="https://CodeMirror.net/mode/meta.js"></script>
<script src="https://CodeMirror.net/addon/hint/xml-hint.js"></script>
<script src="https://CodeMirror.net/addon/hint/html-hint.js"></script>
<script src="https://CodeMirror.net/addon/search/jump-to-line.js"></script>
<script src="https://CodeMirror.net/addon/hint/javascript-hint.js"></script>
<script src="https://CodeMirror.net/mode/xml/xml.js"></script>
<script src="https://CodeMirror.net/mode/javascript/javascript.js"></script>
<script src="https://CodeMirror.net/mode/css/css.js"></script>
<script src="https://CodeMirror.net/mode/htmlmixed/htmlmixed.js"></script>
<script src="https://CodeMirror.net/addon/dialog/dialog.js"></script> 
<script src="https://CodeMirror.net/addon/search/searchcursor.js"></script>
<script src="https://CodeMirror.net/addon/search/jump-to-line.js"></script> 
<script src="https://CodeMirror.net/addon/search/search.js"></script> 
<script src="https://CodeMirror.net/addon/scroll/annotatescrollbar.js"></script> 
<script src="https://CodeMirror.net/addon/search/matchesonscrollbar.js"></script>
    <style>
    
    #window{
            margin-left:-22px;
            margin-top: -40px;
            border: none;
            width:394px;
            height:660px;
            }
    .preview-nav{
            margin-left:-33px;
            margin-top:-100px;
            background: #00002c;
            position: fixed;
            height:62px;
            width:415px;
            }
    .Run{
      z-index:3;
      display:none;
      padding-top:100px;
      position:fixed;
      left:0;
      top:0;
      width:100%;
      height:100%;
      overflow:auto;
      background-color:#ffffff;
      }
    .Run-content{
      border-radius:8px;
      margin:auto;
      background-color:#ffffff;
      position:relative;
      padding:0;
      outline:0;
      width:350px;
      height:300px;
      color:#000000;
      }
      .ncolor{
        background: none;
        border: none;
      }
      .cm-keyword{
        color: red;
      }
    </style>
      </head>
      <body bgcolor="#000000">
        <table border="0">
        <tr><td><input type="url" autocomplete="off" id="url" placeholder="URL...." oninput="Get()"></td><td><button onclick="document.getElementById('Run').style.display='block'" style="margin-top:-50px;" class="bbotton"><img src="icons/browser.png" width="45" height="45"></button></td><td><button class="Save" onclick="Save()"><img src="icons/GDownload.png" width="50" height="48"></button></td></tr>
        </table>
        <div id="SourceCode" onclick="editor.execCommand('autocomplete')"></div>
        <div id="tools">
          <button style="margin-top:-46px;margin-left:30px;position:fixed;" class="ncolor" onclick="find()"><img src="icons/search.png" width="40" height="40"></button>
          </div>
        <script>
          var editor = CodeMirror(document.getElementById('SourceCode'), {
            mode: 'text/html',
            lineNumbers: true,
            theme: 'DE',
          });
        </script>
    <script>
    function viewsource() {
    
      editor.setValue(document.getElementById('window').contentWindow.document.documentElement.innerHTML);
    }
    function Get() {
    
    document.getElementById('window').src= document.getElementById('url').value;
    }
    function Save() {
        var textToWrite = editor.getValue();
        var textFileAsBlob = new Blob([textToWrite], {
            type: ''
        });
        var fileNameToSaveAs = document.getElementById('url').value;
        var downloadLink = document.createElement("a");
        downloadLink.download = fileNameToSaveAs;
        downloadLink.innerHTML = "Download File";
        if (window.webkitURL && window.webkitURL.createObjectURL) {
            // Chrome allows the link to be clicked
            // without actually adding it to the DOM.
            downloadLink.href = window.webkitURL.createObjectURL(textFileAsBlob);
        } else {
            // Firefox requires the link to be added to the DOM
            // before it can be clicked.
            downloadLink.href = window.URL.createObjectURL(textFileAsBlob);
            downloadLink.onclick = destroyClickedElement;
            downloadLink.style.display = "none";
            document.body.appendChild(downloadLink);
        }
        downloadLink.click();
    }
    
    function destroyClickedElement(event) {
        document.body.removeChild(event.target);
    }
    function find() {
      
      editor.execCommand('find');
    }
    function AC() {
      
      editor.execCommand('autocomplete');
    }
    </script>
         <div id="Run" class="Run">
      <div class="Run-content">
        <div>
     <nav class="preview-nav">
    <button class="ncolor" onclick="document.getElementById('Run').style.display='none';"><img src="icons/Close.png" width="50" height="50"></button>
    </nav>
           <iframe id="window" onload="viewsource()" onerror="error()"></iframe>
         </div>
        </div>
       </div>
      </body>
    </html>

但是除非要下载的文件位于设备本地，否则无法显示源，例如：- 如果您尝试它将不起作用，因为出于安全目的，只有当要包含的文件是位于设备本地

Answer 5

使用JQuery： http : //api.jquery.com/contents/ （仅当域匹配时）

例如：

$(iframe).contents().find('body').html();

如果不匹配，则可以再次加载它（因为它可能已经存储在客户端中，因此可能不会再次发送到服务器）：

var html;
$.get($(iframe).get(0).src, function(content) {
    html = content;
});

Answer 6

有关基于 Mozilla 的浏览器如何处理它，请参阅https://developer.mozilla.org/en/HTML/Element/iframe#Scripting 。 你最喜欢的 JavaScript 库中应该有抽象，可以处理 IE、WebKit、Gecko 等 DOM 之间不可避免的命名差异。