变换标题分成虚线URL友好字符串 [英] Transform title into dashed URL-friendly string

问题描述

我想编写一个将改变任何标题为URL友好的字符串，类似于计算器做什么一个C＃方法：

• 破折号


• 替换空格去掉括号


• 等

我想按照RFC 3986标准除去保留的字符（从维基百科），但我不知道如果这样做够吗？它将使链接可行的，但没有人知道其它字符被替换这里在什么计算器？我不希望在我的网址与-s％，结束了...

当前实施

 字符串结果= Regex.Replace（value.Trim（），@[*'！'（）;？：@&功放; + = $，/ \\％＃ \ [\]<>«»{} _]）; 
返回Regex.Replace（result.Trim（），@[\s * [\ --- \s] \s *]， - ）; 
  

我的提问

1. 我应该去掉哪些字符？


2. 我应该限制结果字符串的最大长度是多少？


3. 任何人都知道哪些规则是在游戏应用在这里对SO？

的子问题结果
我应该搬到这个问题？即使它的节目相关的元

解决方案

而不是找东西来代替，的 无保留的字符是如此短暂，它会让一个不错的明确的正则表达式。

 返回Regex.Replace（值，@[^ A-ZA-z0-9_\〜。] +， - ）; 
  

（请注意，我并​​没有包括在允许的字符列表中的破折号，这就是因此获得由1个或多个运营商大赚[ + ]，使多个破折号（原或产生的或组合）被折叠，按照多米尼克罗杰的良好的出发点。 ）

您可能还需要删除常用词（下称，一，一等），这样做虽然可以稍微改变的意义一句话。可能要删除任何尾随破折号和句点为好。

此外强烈建议你做什么，所以和别人做的，包括一个唯一的标识符的其他比标题，然后只处理URL时使用的唯一ID。因此， http://example.com/articles/1234567/is-the-pop-catholic （注意没有'E'）和 HTTP： //example.com/articles/1234567/is-the-pope-catholic 解析为同一资源。

I would like to write a C# method that would transform any title into a URL friendly string, similar to what stackoverflow does:

• replace spaces with dashes
• remove parenthesis
• etc.

I'm thinking of removing Reserved characters as per RFC 3986 standard (from Wikipedia) but I don't know if that would be enough? It would make links workable, but does anyone know what other characters are being replaced here at stackoverflow? I don't want to end up with %-s in my URLs...

Current implementation

string result = Regex.Replace(value.Trim(), @"[!*'""`();:@&+=$,/\\?%#\[\]<>«»{}_]");
return Regex.Replace(result.Trim(), @"[\s*[\-–—\s]\s*]", "-");

My questions

1. Which characters should I remove?
2. Should I limit the maximum length of resulting string?
3. Anyone know which rules are applied on titles here on SO?

A sub-question
Should I move this question to meta even though it's programming related?

解决方案

Rather than looking for things to replace, the list of unreserved chars is so short, it'll make for a nice clear regex.

return Regex.Replace(value, @"[^A-Za-z0-9_\.~]+", "-");

(Note that I didn't include the dash in the list of allowed chars; that's so it gets gobbled up by the "1 or more" operator [+] so that multiple dashes (in the original or generated or a combination) are collapsed, as per Dominic Rodger's excellent point.)

You may also want to remove common words ("the", "an", "a", etc.), although doing so can slightly change the meaning of a sentence. Probably want to remove any trailing dashes and periods as well.

Also strongly recommend you do what SO and others do, and include a unique identifier other than the title, and then only use that unique ID when processing the URL. So http://example.com/articles/1234567/is-the-pop-catholic (note the missing 'e') and http://example.com/articles/1234567/is-the-pope-catholic resolve to the same resource.

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