static void ParseAndApplyFlags(string[] lineTokens, RewriteRule rule)
{
if (lineTokens.Length != 4)
{
return;
}
var flagStr = lineTokens[3].ToLowerInvariant();
flagStr = flagStr.Trim('[', ']');
var flagArray = flagStr.Split(',');
foreach (var flag in flagArray)
{
switch (flag)
{
case "f":
case "forbidden":
rule.StatusCode = HttpStatusCode.Forbidden;
continue;
case "g":
case "gone":
rule.StatusCode = HttpStatusCode.Gone;
continue;
case "nc":
case "nocase":
rule.Flags |= RewriteRuleFlags.CaseInsensitive;
continue;
case "qsa":
case "qsappend":
rule.Flags |= RewriteRuleFlags.QueryStringAppend;
continue;
case "qsd":
case "qsdrop":
rule.Flags |= RewriteRuleFlags.QueryStringDrop;
continue;
case "permanent":
rule.StatusCode = HttpStatusCode.MovedPermanently;
continue;
case "seeother":
rule.StatusCode = HttpStatusCode.SeeOther;
continue;
case "temp":
rule.StatusCode = HttpStatusCode.TemporaryRedirect;
continue;
}
if (flag.StartsWith("r="))
{
rule.StatusCode = (HttpStatusCode)int.Parse(flag.Substring(2));
}
}
}
public static RewriteRule Parse(string line, string[] lineTokens, RewriteOptions options)
{
var rewriteRule = new RewriteRule
{
RewrittenUrl = lineTokens[2],
Source = line,
Options = options,
StatusCode = options.DefaultResponseStatusCode
};
ParseAndApplyFlags(lineTokens, rewriteRule);
var regexOptions = rewriteRule.Flags.HasFlag(RewriteRuleFlags.CaseInsensitive) || options.GlobalCaseInsensitivity ? RegexOptions.IgnoreCase : RegexOptions.None;
rewriteRule.PathRegex = new Regex(lineTokens[1], regexOptions, TimeSpan.FromMilliseconds(100));
return(rewriteRule);
}
public static IEnumerable <Ruleset> Parse(string rules)
{
var lines = rules.Split(new[] { "\n" }, StringSplitOptions.RemoveEmptyEntries);
var rulesets = new List <Ruleset>();
var ruleset = new Ruleset();
var options = new RewriteOptions();
foreach (var line in lines)
{
try
{
var tokens = line.Trim().Split(new[] { " " }, StringSplitOptions.RemoveEmptyEntries);
if (tokens[0] == "RewriteCond")
{
ruleset.Conditions.Add(RewriteCond.Parse(line, tokens, options));
}
else if (tokens[0] == "RewriteRule")
{
ruleset.Rule = RewriteRule.Parse(line, tokens, options);
rulesets.Add(ruleset);
ruleset = new Ruleset();
}
else if (tokens[0] == "RewriteOptions")
{
options = RewriteOptions.Parse(line, tokens);
}
}
catch
{
}
}
return(rulesets);
}