問題描述
我正在嘗試編寫一個正則表達式.
I'm trying to write a regexp.
一些背景信息:我嘗試查看我網站 URL 的 REQUEST_URI 是否包含另一個 URL.像這樣:
some background info: I am try to see if the REQUEST_URI of my website's URL contains another URL. like these:
- http://mywebsite.com/google.com/search=xyz
但是，網址不會總是包含http"或www".所以模式也應該匹配像這樣的字符串:
However, the url wont always contain the 'http' or the 'www'. so the pattern should also match strings like:
- http://mywebsite.com/yahoo.org/search=xyz
- http://mywebsite.com/www.yahoo.org/search=xyz
- http://mywebsite.com/msn.co.uk'
- http://mywebsite.com/http://msn.co.uk'
有一堆正則表達式可以匹配 url，但我發現沒有一個可以在 http 和 www 上進行可選匹配.
there are a bunch of regexps out there to match urls but none I have found do an optional match on the http and www.
我想知道匹配的模式是否可能是這樣的:
i'm wondering if the pattern to match could be something like:
^([a-z]).(com|ca|org|etc)(.)
我想也許另一個選擇是匹配任何包含點 (.) 的字符串.(因為我的應用程序中的其他 REQUEST_URI 通常不包含點)
I thought maybe another option was to perhaps just match any string that had a dot (.) in it. (as the other REQUEST_URI's in my application typically won't contain dots)
這對任何人都有意義嗎?我真的很感謝在這方面的幫助，因為它已經阻止了我的項目數周.
Does this make sense to anyone? I'd really appreciate some help with this its been blocking my project for weeks.
非常感謝-蒂姆
推薦答案
我建議使用一種簡單的方法，基本上是建立在你所說的基礎上，只是任何帶有點的東西，但也使用正斜杠.捕獲所有內容而不會錯過不尋常的 URL.所以就像:
I suggest using a simple approach, essentially building on what you said, just anything with a dot in it, but working with the forward slashes too. To capture everything and not miss unusual URLs. So something like:
^((?:https?://)?[^./]+(?:.[^./]+)+(?:/.*)?)$
它讀作:
- 可選 http://或 https://
- 非點或正斜杠字符
- 一組或多組點后跟非點或正斜杠字符
- 可選的正斜杠及其后的任何內容
將整個事物捕獲到第一個分組.
Capturing the whole thing to the first grouping.
它會匹配，例如:
nic.uknic.uk/http://nic.ukhttp://nic.uk/https://example.com/test/?a=bcd
驗證它們是有效的 URL 是另一回事！它也會匹配:
Verifying they are valid URLs is another story! It would also match:
index.php
它不會匹配:
目錄/index.php
最小匹配基本上是something.something，其中沒有正斜杠，除非它在點之后至少出現一個字符.因此，請確保不要將這種格式用于其他任何用途.
The minimal match is basically something.something, with no forward slash in it, unless it comes at least one character past the dot. So just be sure not to use that format for anything else.
這篇關于正則表達式匹配帶有可選的“www"和協議的 URL的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！