[英]RegEx - character not before match
I understand the concepts of RegEx, but this is more or less the first time I've actually been trying to write some myself. 我了解RegEx的概念,但这或多或少是我第一次真正尝试自己编写一些东西。
As a part of a project, I'm attempting to parse out strings which match to a certain domain (actually an array of domains, but let's keep it simple). 作为项目的一部分,我试图解析出与某个域匹配的字符串(实际上是一个域数组,但让我们保持简单)。
At first I started out with this: 首先,我从以下开始:
url.match('www.example.com')
But I noticed I was also getting input like this: 但是我注意到我也得到了这样的输入:
http://www.someothersite.com/page?ref=http://www.example.com http://www.someothersite.com/page?ref=http://www.example.com
These rows will of course match for www.example.com
but I wish to exclude them. 这些行当然会与www.example.com
匹配,但我希望排除它们。 So I was thinking along these lines: Only match rows that contain www.example.com
, but not after a ?
因此,我一直在考虑以下方面:只匹配包含www.example.com
行,而不匹配?
character. 字符。 This is what I came up with: 这是我想出的:
var reg = new RegExp("[^\\?]*" + url + "(\\.*)", "gi");
This does however not seem to work, any suggestions would be greatly appreciated as I fear I've used what little knowledge I yet possess in the matter. 但是,这似乎行不通,因为我担心自己在此问题上所掌握的知识很少,所以任何建议都将不胜感激。
Edit: Some clarifications. 编辑:一些澄清。
example.com
, www.example.org
, www.somethirdsite.com
and web.example.net
should all be valid), these will be stored in a variable. 这些将具有/应该处理0-1个任意子域( example.com
, www.example.org
, www.somethirdsite.com
和web.example.net
均应有效),它们将存储在变量中。 http://www.someothersite.com/page?ref=https://www.example.com
and http://www.someothersite.com/page?ref=www.example.com
ie, if my needle is not part of the request domain, but part of the request data, I do not want the match. 我专门找到了如上所述的请求,但我也希望能够处理http://www.someothersite.com/page?ref=https://www.example.com
和http://www.someothersite.com/page?ref=www.example.com
即,如果我的针头不是请求域的一部分,而是请求数据的一部分,则我不希望匹配。 Edit: here is the modified regex for arbitrary domain: 编辑:这是任意域的修改后的正则表达式:
RegExp("(^|\\s)(https?://)?(\\w+\\.)?" + url, "gi");
The idea here is that you're matching only url preceded by some white spaces character, which makes it impossible to be inside the query. 这里的想法是,您只匹配带有一些空格字符的url,这使得它不可能出现在查询中。
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