如何从CasperJS访问iframe？

Question

I have a webpage with an iframe. 我有一个带有iframe的网页。 I'd like to access the contents of the iframe using CasperJS . 我想使用CasperJS访问iframe的内容。 In particular, I need to click buttons and fill a form. 特别是，我需要单击按钮并填写表格。 How can I do that? 我怎样才能做到这一点？

The main webpage is main.html : 主页是main.html ：

<html><body>
<a id='main-a' href="javascript:console.log('pressed main-a');">main-a</a>
<iframe src="iframe.html"></iframe>
<a id='main-b' href="javascript:console.log('pressed main-b');">main-b</a>
</body></html>

The iframe is: iframe是：

<html><body>
<a id='iframe-c' href="javascript:console.log('pressed iframe-c');">iframe-c</a>
</body></html>

My naïve approach: 我的天真做法：

var casper = require('casper').create({
    verbose: true,
    logLevel: "debug"
});

casper.start("http://jim.sh/~jim/tmp/casper/main.html", function() {
    this.click('a#main-a');
    this.click('a#main-b');
    this.click('a#iframe-c');
});

casper.run(function() {
    this.exit();
});

Doesn't work, of course, because the a#iframe-c selector isn't valid in the main frame: 当然不起作用，因为a#iframe-c选择器在主框架中无效：

[info] [phantom] Starting...
[info] [phantom] Running suite: 2 steps
[debug] [phantom] opening url: http://jim.sh/~jim/tmp/casper/main.html, HTTP GET
[debug] [phantom] Navigation requested: url=http://jim.sh/~jim/tmp/casper/main.html, type=Other, lock=true, isMainFrame=true
[debug] [phantom] url changed to "http://jim.sh/~jim/tmp/casper/main.html"
[debug] [phantom] Navigation requested: url=http://jim.sh/~jim/tmp/casper/iframe.html, type=Other, lock=true, isMainFrame=false
[debug] [phantom] Successfully injected Casper client-side utilities
[info] [phantom] Step 2/2 http://jim.sh/~jim/tmp/casper/main.html (HTTP 200)
[debug] [phantom] Mouse event 'click' on selector: a#main-a
[info] [remote] pressed main-a
[debug] [phantom] Mouse event 'click' on selector: a#main-b
[info] [remote] pressed main-b
[debug] [phantom] Mouse event 'click' on selector: a#iframe-c
FAIL CasperError: Cannot dispatch click event on nonexistent selector: a#iframe-c
#    type: uncaughtError
#    error: "CasperError: Cannot dispatch click event on nonexistent selector: a#iframe-c"
CasperError: Cannot dispatch click event on nonexistent selector: a#iframe-c    
  /tmp:901 in mouseEvent
  /tmp:365 in click
  /tmp/test.js:9
  /tmp:1103 in runStep
  /tmp:324 in checkStep

Is there any way to make this work? 有什么办法可以使这项工作吗？ A hack that involves poking into phantomjs directly would be fine, but I don't know what to do there. 直接涉及到phantomjs的hack很好，但是我不知道该怎么办。

I'm using CasperJS version 1.0.0-RC1 and phantomjs version 1.6.0. 我正在使用CasperJS 1.0.0-RC1版和phantomjs 1.6.0版。

Answer 1

Spent forever looking for this, and of course I found the answer minutes after posting the question. 一直花时间寻找这个问题，当然我在发布问题后几分钟就找到了答案。

I can use the new frame switching commands added to phantomjs in this commit . 我可以在此commit中使用添加到phantomjs的新帧切换命令。 Specifically, the this.page.switchToChildFrame(0) and this.page.switchToParentFrame() functions. 具体来说， this.page.switchToChildFrame(0)和this.page.switchToParentFrame()函数。 It appears undocumented, and it also seems that the methods have been changed for upcoming releases, but it does work: 似乎未记录在案，并且似乎方法也已针对即将发布的版本进行了更改，但它确实起作用：

var casper = require('casper').create({
    verbose: true,
    logLevel: "debug"
});

casper.start("http://jim.sh/~jim/tmp/casper/main.html", function() {
    this.click('a#main-a');
    this.click('a#main-b');
    this.page.switchToChildFrame(0);
    this.click('a#iframe-c');
    this.page.switchToParentFrame();
});

casper.run(function() {
    this.exit();
});

Answer 2

From 1.0 you can use withFrame 从1.0开始，您可以使用withFrame

  casper.open("http://www.example.com/page.html", function() {
    casper.withFrame('flashHolder', function() {
      this.test.assertSelectorExists('#the-flash-thing', 'Should show Flash');
    });
  });

Answer 3

实际上，您必须使用Phantomjs 1.5提供的新--web-security=no功能，才能访问这些iFrames及其内容。

Answer 4

Suppose we have different frames(frame1 and frame2) and we have to access different elements(like click or check if div tag exits or not) of those frames. 假设我们有不同的框架（frame1和frame2），并且我们必须访问这些框架的不同元素（例如单击或检查div标签是否退出）。

casper.withFrame('frame1', function() {
    var file = '//*[@id="profile_file"]';
    casper.thenClick(x(file));
});

casper.withFrame('frame2', function() {
  casper.then(function () {
     casper.waitForSelector('#pageDIV',
            function pass() {
                console.log("pass");
            },
            function fail(){
                console.log("fail");
            }
      );
   });
});

Answer 5

You can do something like this: 您可以执行以下操作：

casper.start("url here...", function() { 
    this.withFrame(0, function() {
        this.evaluate(function() {
            document.querySelector('img#btn_start').click();
        })
    })
});

You can replace the zero with the name of the iframe. 您可以将零替换为iframe的名称。

如何从CasperJS访问iframe？

问题描述

5 个解决方案

解决方案1
41 已采纳 2012-08-27 22:12:22

解决方案2
35 2013-01-04 09:16:58

解决方案3
4 2012-08-27 22:02:08

解决方案4
3 2015-10-28 13:28:49

解决方案5
0 2018-04-04 09:14:59

如何从CasperJS访问iframe？

问题描述

5 个解决方案

解决方案1 41 已采纳 2012-08-27 22:12:22

解决方案2 35 2013-01-04 09:16:58

解决方案3 4 2012-08-27 22:02:08

解决方案4 3 2015-10-28 13:28:49

解决方案5 0 2018-04-04 09:14:59

解决方案1
41 已采纳 2012-08-27 22:12:22

解决方案2
35 2013-01-04 09:16:58

解决方案3
4 2012-08-27 22:02:08

解决方案4
3 2015-10-28 13:28:49

解决方案5
0 2018-04-04 09:14:59