下面是我的(稍慢，但写起来很有趣)Jeff的代码版本:

public static string URLFriendly(string title)
{
    char? prevRead = null,
        prevWritten = null;

    var seq = 
        from c in title
        let norm = RemapInternationalCharToAscii(char.ToLowerInvariant(c).ToString())[0]
        let keep = char.IsLetterOrDigit(norm)
        where prevRead.HasValue || keep
        let replaced = keep ? norm
            :  prevWritten != '-' ? '-'
            :  (char?)null
        where replaced != null
        let s = replaced + (prevRead == null ? ""
            : norm == '#' && "cf".Contains(prevRead.Value) ? "sharp"
            : norm == '+' ? "plus"
            : "")
        let _ = prevRead = norm
        from written in s
        let __ = prevWritten = written
        select written;

    const int maxlen = 80;  
    return string.Concat(seq.Take(maxlen)).TrimEnd('-');
}

public static string RemapInternationalCharToAscii(string text)
{
    var seq = text.Normalize(NormalizationForm.FormD)
        .Where(c => CharUnicodeInfo.GetUnicodeCategory(c) != UnicodeCategory.NonSpacingMark);

    return string.Concat(seq).Normalize(NormalizationForm.FormC);
}

我的测试字符串:

“我喜欢c#， f#， c++，还有……焦糖布丁! !他们看到我在编程……他们hatin”……想抓住我的下流行为……”

假设你的模型类有一个title属性，你可以简单地覆盖模型中的to_param方法，就像这样:

def to_param
  title.downcase.gsub(/ /, '-')
end

Railscast的这集有所有的细节。你也可以使用这个来确保标题只包含有效字符:

validates_format_of :title, :with => /^[a-z0-9-]+$/,
                    :message => 'can only contain letters, numbers and hyphens'

我不太了解Ruby或Rails，但在Perl中，这是我要做的:

my $title = "How do you change a title to be part of the url like Stackoverflow?";

my $url = lc $title;   # Change to lower case and copy to URL.
$url =~ s/^\s+//g;     # Remove leading spaces.
$url =~ s/\s+$//g;     # Remove trailing spaces.
$url =~ s/\s+/\-/g;    # Change one or more spaces to single hyphen.
$url =~ s/[^\w\-]//g;  # Remove any non-word characters.

print "$title\n$url\n";

我刚做了一个快速测试，似乎有用。希望这在Ruby中比较容易翻译。

现在所有的浏览器都能很好地处理utf8编码，所以你可以使用WebUtility。UrlEncode方法，它类似于HttpUtility。@giamin使用的UrlEncode，但它在web应用程序之外工作。

为了更好地衡量，这里是WordPress中的PHP函数…我认为WordPress是使用花哨链接的最受欢迎的平台之一。

    function sanitize_title_with_dashes($title) {
            $title = strip_tags($title);
            // Preserve escaped octets.
            $title = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '---$1---', $title);
            // Remove percent signs that are not part of an octet.
            $title = str_replace('%', '', $title);
            // Restore octets.
            $title = preg_replace('|---([a-fA-F0-9][a-fA-F0-9])---|', '%$1', $title);
            $title = remove_accents($title);
            if (seems_utf8($title)) {
                    if (function_exists('mb_strtolower')) {
                            $title = mb_strtolower($title, 'UTF-8');
                    }
                    $title = utf8_uri_encode($title, 200);
            }
            $title = strtolower($title);
            $title = preg_replace('/&.+?;/', '', $title); // kill entities
            $title = preg_replace('/[^%a-z0-9 _-]/', '', $title);
            $title = preg_replace('/\s+/', '-', $title);
            $title = preg_replace('|-+|', '-', $title);
            $title = trim($title, '-');
            return $title;
    }

这个函数以及一些支持函数可以在wp-includes/formatting.php中找到。

您可以使用以下帮助器方法。它可以转换Unicode字符。

public static string ConvertTextToSlug(string s)
{
    StringBuilder sb = new StringBuilder();

    bool wasHyphen = true;

    foreach (char c in s)
    {
        if (char.IsLetterOrDigit(c))
        {
            sb.Append(char.ToLower(c));
            wasHyphen = false;
        }
        else
            if (char.IsWhiteSpace(c) && !wasHyphen)
            {
                sb.Append('-');
                wasHyphen = true;
            }
    }

    // Avoid trailing hyphens
    if (wasHyphen && sb.Length > 0)
        sb.Length--;

    return sb.ToString().Replace("--","-");
}