using System; using System.Collections.Generic; using System.Text; using System.Web; using System.Text.RegularExpressions;
namespace Deerchao.Web { public class UbbDecoder { private static readonly RegexOptions options = RegexOptions.Compiled | RegexOptions.Singleline;
/// /// 解析Ubb代码为Html代码 /// /// Ubb代码 /// 解析得到的Html代码 public static string Decode(string ubb) { if (string.IsNullOrEmpty(ubb)) return null; string result = ubb; result = HttpUtility.HtmlEncode(result);
result = DecodeStyle(result); result = DecodeFont(result); result = DecodeColor(result); result = DecodeImage(result); result = DecodeLinks(result); result = DecodeQuote(result); result = DecodeAlign(result); result = DecodeList(result); result = DecodeHeading(result); result = DecodeBlank(result);
return result; }
/// /// 解析Ubb代码为Html代码,所有的链接为rel="nofollow" /// /// Ubb代码 /// 解析得到的Html代码 public static string DecodeNoFollow(string ubb) { if (string.IsNullOrEmpty(ubb)) return null; string result = ubb; result = HttpUtility.HtmlEncode(result);
result = DecodeStyle(result); result = DecodeFont(result); result = DecodeColor(result); result = DecodeImage(result); result = DecodeLinksNoFollow(result); result = DecodeQuote(result); result = DecodeAlign(result); result = DecodeList(result); result = DecodeHeading(result); result = DecodeBlank(result);
return result; }
private static string DecodeHeading(string ubb) { string result = ubb; result = Regex.Replace(result, @"\[h(\d)\](.*?)\[/h\1\]", "$2", options); return result; }
", options); result = Regex.Replace(result, @"\[list\]\s*(.*?)\[/list\]", "
$1
", options); result = Regex.Replace(result, @"\[list=1\]\s*(.*?)\[/list\]", string.Format(sListFormat, "decimal"), options); result = Regex.Replace(result, @"\[list=i\]\s*(.*?)\[/list\]", string.Format(sListFormat, "lower-roman"), options); result = Regex.Replace(result, @"\[list=I\]\s*(.*?)\[/list\]", string.Format(sListFormat, "upper-roman"), options); result = Regex.Replace(result, @"\[list=a\]\s*(.*?)\[/list\]", string.Format(sListFormat, "lower-alpha"), options); result = Regex.Replace(result, @"\[list=A\]\s*(.*?)\[/list\]", string.Format(sListFormat, "upper-alpha"), options);
return result; }
private static string DecodeBlank(string ubb) { string result = ubb;
result = Regex.Replace(result, @"(?<= ) | (?= )", " ", options); result = Regex.Replace(result, @"\r\n", ""); string[] blockTags = {"h[1-6]", "li", "list", "div", "p", "ul"}; //clear br before block tags(start or end) foreach (string tag in blockTags) { Regex r = new Regex("(<" + tag + ")",options); result = r.Replace(result, "$1"); r = new Regex("( result = r.Replace(result, "$1"); } return result; }
private static string DecodeAlign(string ubb) { string result = ubb;
result = Regex.Replace(result, @"\[left\](.*?)\[/left\]", "$1
", options); result = Regex.Replace(result, @"\[right\](.*?)\[/right\]", "$1
", options); result = Regex.Replace(result, @"\[center\](.*?)\[/center\]", "$1
", options);
return result; }
private static string DecodeQuote(string ubb) { string result = ubb;
result = Regex.Replace(result, @"\[quote\]", "
", options); result = Regex.Replace(result, @"\[/quote\]", "
", options); return result; }
private static string DecodeFont(string ubb) { string result = ubb;
result = Regex.Replace(result, @"\[size=([-\w]+)\](.*?)\[/size\]", "$2", options); result = Regex.Replace(result, @"\[fOnt=(.*?)\](.*?)\[/font\]", "$2", options); return result; }
private static string DecodeLinks(string ubb) { string result = ubb;
result = Regex.Replace(result, @"\[url\]www\.(.*?)\[/url\]", "$1", options); result = Regex.Replace(result, @"\[url\](.*?)\[/url\]", "$1", options); result = Regex.Replace(result, @"\[url=(.*?)\](.*?)\[/url\]", "$2", options); result = Regex.Replace(result, @"\[email\](.*?)\[/email\]", "$1", options); return result; }
private static string DecodeLinksNoFollow(string ubb) { string result = ubb;
result = Regex.Replace(result, @"\[url\]www\.(.*?)\[/url\]", "$1", options); result = Regex.Replace(result, @"\[url\](.*?)\[/url\]", "$1", options); result = Regex.Replace(result, @"\[url=(.*?)\](.*?)\[/url\]", "$2", options); result = Regex.Replace(result, @"\[email\](.*?)\[/email\]", "$1", options); return result; }
private static string DecodeImage(string ubb) { string result = ubb;
result = Regex.Replace(result, @"\[hr\]", "", options); result = Regex.Replace(result, @"\[img\](.+?)\[/img\]", "", options); result = Regex.Replace(result, @"\[img=(\d+)x(\d+)\](.+?)\[/img\]", "", options);
return result; }
private static string DecodeColor(string ubb) { string result = ubb; result = Regex.Replace(result, @"\[color=(#?\w+?)\](.+?)\[/color\]", "$2",options);
return result; }
private static string DecodeStyle(string ubb) { string result=ubb; //we don't need this for perfomance and other consideration: //(]*>(?>]*>(?)|(?<-Depth>)|.)+(?(Depth)(?!))) result = Regex.Replace(result, @"\[[b]\](.*?)\[/[b]\]", "$1", options); result = Regex.Replace(result, @"\[[u]\](.*?)\[/[u]\]", "$1", options); result = Regex.Replace(result, @"\[[i]\](.*?)\[/[i]\]", "$1", options);
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