Javascript访问其他网页 [英] Javascript access another webpage

问题描述

我对JavaScript的了解非常少，但是我对编写一个需要来自另一个网页的信息的脚本感兴趣.是否有类似urllib2之类的javascript代码?它不需要非常强大，只需足以处理一个简单的GET请求，而无需存储cookie或任何东西并存储结果.

I know very, very little of javascript, but I'm interested in writing a script which needs information from another webpage. It there a javascript equivalent of something like urllib2? It doesn't need to be very robust, just enough to process a simple GET request, no need to store cookies or anything and store the results.

推荐答案

有 XMLHttpRequest ，但由于相同的来源政策相同的来源政策.

There is the XMLHttpRequest, but that would be limited to the same domain of your web site, because of the Same Origin Policy.

但是，您可能有兴趣查看以下Stack Overflow帖子，以获取有关Same Origin策略的一些解决方案:

However, you may be interested in checking out the following Stack Overflow post for a few solutions around the Same Origin Policy:

• 如何规避原产地政策

更新:

这是一个非常基本的(非跨浏览器)示例:

Here's a very basic (non cross-browser) example:

var xhr = new XMLHttpRequest();
xhr.open('GET', '/questions/3315235', true);
xhr.onreadystatechange = function() {
  if (xhr.readyState === 4)  { 
    console.log(xhr.responseText);
  }
};
xhr.send(null);

如果您在 Firebug 中运行以上命令，并且打开了堆栈溢出功能，则将获得该问题的HTML在您的JavaScript控制台中打印:

If you run the above in Firebug, with Stack Overflow open, you'd get the HTML of this question printed in your JavaScript console:

JavaScript访问其他网页http://img217.imageshack.us/img217/5545 /fbugxml.png

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