清理带有标题的 URL 的最佳方法是什么 [英] What is the Best Way to Clean a URL with a Title in it

问题描述

清理 URL 的最佳方法是什么?我正在寻找这样的网址

What is the best way to clean a URL? I am looking for a URL like this

what_is_the_best_headache_medication

what_is_the_best_headache_medication

我当前的代码

public string CleanURL(string str)
{
    str = str.Replace("!", "");
    str = str.Replace("@", "");
    str = str.Replace("#", "");
    str = str.Replace("$", "");
    str = str.Replace("%", "");
    str = str.Replace("^", "");
    str = str.Replace("&", "");
    str = str.Replace("*", "");
    str = str.Replace("(", "");
    str = str.Replace(")", "");
    str = str.Replace("-", "");
    str = str.Replace("_", "");
    str = str.Replace("+", "");
    str = str.Replace("=", "");
    str = str.Replace("{", "");
    str = str.Replace("[", "");
    str = str.Replace("]", "");
    str = str.Replace("}", "");
    str = str.Replace("|", "");
    str = str.Replace(@"\", "");
    str = str.Replace(":", "");
    str = str.Replace(";", "");
    str = str.Replace(@"\", "");
    str = str.Replace("'", "");
    str = str.Replace("<", "");
    str = str.Replace(">", "");
    str = str.Replace(",", "");
    str = str.Replace(".", "");
    str = str.Replace("`", "");
    str = str.Replace("~", "");
    str = str.Replace("/", "");
    str = str.Replace("?", "");
    str = str.Replace("  ", " ");
    str = str.Replace("   ", " ");
    str = str.Replace("    ", " ");
    str = str.Replace("     ", " ");
    str = str.Replace("      ", " ");
    str = str.Replace("       ", " ");
    str = str.Replace("        ", " ");
    str = str.Replace("         ", " ");
    str = str.Replace("          ", " ");
    str = str.Replace("           ", " ");
    str = str.Replace("            ", " ");
    str = str.Replace("             ", " ");
    str = str.Replace("              ", " ");
    str = str.Replace(" ", "_");
    return str;
}

推荐答案

通常你最好的选择是使用白名单正则表达式方法，而不是删除所有不需要的字符，因为你肯定会去想念一些.

Generally your best bet is to go with a white list regular expression approach instead of removing all the unwanted characters because you definitely are going to miss some.

到目前为止，这里的答案都很好，但我个人不想完全删除带有重音符号的变音符号和字符.所以我想出的最终解决方案是这样的:

The answers here are fine so far but I personally did not want to remove umlauts and characters with accent marks entirely. So the final solution I came up with looks like this:

public static string CleanUrl(string value)
{
    if (value.IsNullOrEmpty())
        return value;

    // replace hyphens to spaces, remove all leading and trailing whitespace
    value = value.Replace("-", " ").Trim().ToLower();

    // replace multiple whitespace to one hyphen
    value = Regex.Replace(value, @"[\s]+", "-");

    // replace umlauts and eszett with their equivalent
    value = value.Replace("ß", "ss");
    value = value.Replace("ä", "ae");
    value = value.Replace("ö", "oe");
    value = value.Replace("ü", "ue");

    // removes diacritic marks (often called accent marks) from characters
    value = RemoveDiacritics(value);

    // remove all left unwanted chars (white list)
    value = Regex.Replace(value, @"[^a-z0-9\s-]", String.Empty);

    return value;
}

使用的 RemoveDiacritics 方法基于 布莱尔康拉德的回答:

The used RemoveDiacritics method is based on the SO answer by Blair Conrad:

public static string RemoveDiacritics(string value)
{
    if (value.IsNullOrEmpty())
        return value;

    string normalized = value.Normalize(NormalizationForm.FormD);
    StringBuilder sb = new StringBuilder();

    foreach (char c in normalized)
    {
        if (CharUnicodeInfo.GetUnicodeCategory(c) != UnicodeCategory.NonSpacingMark)
            sb.Append(c);
    }

    Encoding nonunicode = Encoding.GetEncoding(850);
    Encoding unicode = Encoding.Unicode;

    byte[] nonunicodeBytes = Encoding.Convert(unicode, nonunicode, unicode.GetBytes(sb.ToString()));
    char[] nonunicodeChars = new char[nonunicode.GetCharCount(nonunicodeBytes, 0, nonunicodeBytes.Length)];
    nonunicode.GetChars(nonunicodeBytes, 0, nonunicodeBytes.Length, nonunicodeChars, 0);

    return new string(nonunicodeChars);
}

希望能帮助那些通过 slugifying URLs 和保持变音和朋友同时使用他们的 URL 友好的等价物来挑战的人.

Hope that helps somebody challenged by slugifying URLs and keeping umlauts and friends with their URL friendly equivalent at the same time.

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