使用greasemonkey加载和解析远程URL [英] Load and parse remote url with greasemonkey

问题描述

如何编写Greasemonkey脚本，该脚本将通过URL列表（在同一个域中）并在生成的DOM上启用XPath查询？

How can I write a Greasemonkey script that will go through a list of URLs (on the same domain) and enable an XPath query to be performed on the resulting DOM?

谢谢

推荐答案

使用 GM_xmlhttpRequest 和用于HTML解析的createContextualFragment。有关使用createContextualFragment的示例，请参阅 Greasemonkey的最佳插件 。要解析有效的XML，您只需使用 DOMParser.parseFromString 即可。

Use GM_xmlhttpRequest for the request, and createContextualFragment for HTML parsing. See Best Addons for Greasemonkey for an example using createContextualFragment. For parsing of valid XML you can just use DOMParser.parseFromString.

编辑：这是一个非常简单但完整的例子，展示了一切如何融合在一起：

Here's a very simple but complete example to show how everything fits together:

// ==UserScript==
// @name           Parse HTML demo
// @namespace
// @include        *
// ==/UserScript==

GM_xmlhttpRequest({
    method: 'GET',
    url: 'http://www.google.com',
    onload: function(resp){
    var range = document.createRange();
    range.setStartAfter(document.body);
    var xhr_frag = range.createContextualFragment(resp.responseText);
    var xhr_doc = document.implementation.createDocument(null, 'html', null);
    xhr_doc.adoptNode(xhr_frag);
    xhr_doc.documentElement.appendChild(xhr_frag);
    var node = xhr_doc.evaluate("//span//b[@class='gb1']", xhr_doc, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
    GM_log("node.localName: " + node.localName);
    GM_log("node.textContent: " + node.textContent);
    }
});

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