public void ExecuteResult(HttpContextBase httpContext, ProcessInboundRulesResult ruleResult)
{
var httpRequest = httpContext.Request;
var httpResponse = httpContext.Response;
var responseHeaders = ruleResult.ProcessedResults.SelectMany(e => e.ResponseHeaders);
var replacements = new RewriteHelper.Replacements
{
RequestHeaders = RequestHeaders,
RequestServerVariables = RequestServerVariables
};
httpResponse.Clear();
foreach (var responseHeader in responseHeaders)
{
var responseHeaderValue = RewriteHelper.ReplaceTokens(replacements, responseHeader.Value);
httpResponse.Headers.Set(responseHeader.VariableName, responseHeaderValue);
}
if (ruleResult.FinalAction is IBaseRedirect)
{
if (Configuration.AnalyticsTrackingEnabled)
{
Tracking.TrackRedirect(ruleResult);
}
var redirectAction = ruleResult.FinalAction as IBaseRedirect;
int statusCode;
if (redirectAction.StatusCode.HasValue)
{
statusCode = (int)(redirectAction.StatusCode.Value);
}
else
{
statusCode = (int)HttpStatusCode.MovedPermanently;
}
httpResponse.RedirectLocation = ruleResult.RewrittenUri.ToString();
httpResponse.StatusCode = statusCode;
if (redirectAction.HttpCacheability.HasValue)
{
httpResponse.Cache.SetCacheability(redirectAction.HttpCacheability.Value);
}
}
else if (ruleResult.FinalAction is IBaseRewrite)
{
var rewrittenUrl = ruleResult.RewrittenUri;
var isLocal = String.Equals(httpRequest.Url.Host, rewrittenUrl.Host,
StringComparison.OrdinalIgnoreCase);
if (!isLocal)
{
throw new ApplicationException("Rewrite Url must be a local URL");
}
httpContext.Server.TransferRequest(rewrittenUrl.PathAndQuery, true, httpRequest.HttpMethod, RequestHeaders, true);
}
else if (ruleResult.FinalAction is AbortRequest)
{
// do nothing
}
else if (ruleResult.FinalAction is CustomResponse)
{
var customResponse = ruleResult.FinalAction as CustomResponse;
httpResponse.TrySkipIisCustomErrors = true;
httpResponse.StatusCode = customResponse.StatusCode;
httpResponse.StatusDescription = customResponse.ErrorDescription;
// TODO: Implement Status Reason?
//httpResponse.??? = customResponse.Reason;
if (customResponse.SubStatusCode.HasValue)
{
httpResponse.SubStatusCode = customResponse.SubStatusCode.Value;
}
}
httpResponse.End();
}
private InboundRuleResult ProcessRegularExpressionInboundRule(Uri originalUri, InboundRule inboundRule)
{
var ruleResult = new InboundRuleResult
{
OriginalUri = originalUri,
RewrittenUri = originalUri
};
Match inboundRuleMatch,
lastConditionMatch = null;
// test rule match
var isInboundRuleMatch = TestRuleMatches(inboundRule, originalUri, out inboundRuleMatch);
ConditionMatchResult conditionMatchResult = null;
// test conditions matches
if (isInboundRuleMatch && inboundRule.Conditions != null && inboundRule.Conditions.Any())
{
var replacements = new RewriteHelper.Replacements
{
RequestHeaders = RequestHeaders,
RequestServerVariables = RequestServerVariables
};
conditionMatchResult = RewriteHelper.TestConditionMatches(inboundRule, replacements, out lastConditionMatch);
isInboundRuleMatch = conditionMatchResult.Matched;
}
// test site name restrictions
if (isInboundRuleMatch && !string.IsNullOrEmpty(inboundRule.SiteNameRestriction))
{
isInboundRuleMatch = TestSiteNameRestriction(inboundRule);
}
if (isInboundRuleMatch && inboundRule.Action != null)
{
ruleResult.RuleMatched = true;
if (inboundRule.ResponseHeaders.Any())
{
ruleResult.ResponseHeaders = inboundRule.ResponseHeaders;
}
Log.Debug(this, "INBOUND RULE MATCH - requestUri: {0} inboundRule: {1}", originalUri, inboundRule.Name);
// TODO: Need to implement Rewrite, None
if (inboundRule.Action is Redirect)
{
ProcessRedirectAction(inboundRule, originalUri, inboundRuleMatch, lastConditionMatch, ruleResult);
}
else if (inboundRule.Action is Rewrite)
{
ProcessRewriteAction(inboundRule, originalUri, inboundRuleMatch, lastConditionMatch, ruleResult);
}
else if (inboundRule.Action is ItemQueryRedirect)
{
ProcessItemQueryRedirectAction(inboundRule, originalUri, inboundRuleMatch, lastConditionMatch, ruleResult);
}
else if (inboundRule.Action is AbortRequest || inboundRule.Action is CustomResponse)
{
ProcessActionProcessing(ruleResult);
}
else
{
throw new NotImplementedException("Redirect Action, Custome Response and Abort Reqeust Action are the only supported type of redirects");
}
ruleResult.ResultAction = inboundRule.Action;
ruleResult.ConditionMatchResult = conditionMatchResult;
}
else if (inboundRule.Action == null)
{
Log.Warn(this, "Inbound Rule has no Action set - inboundRule: {0} inboundRule ItemId: {1}", inboundRule.Name, inboundRule.ItemId);
// we are going to skip this because we don't know what to do with it during processing
ruleResult.RuleMatched = false;
}
return(ruleResult);
}
private static string ProcessRuleReplacementsWithMatchTags(string responseString, Using?outboundRuleUsing,
IEnumerable <MatchTag> matchTags, string rewritePattern, string rewriteValue)
{
const string startKey = "start";
const string innerKey = "inner";
const string endKey = "end";
const string nameKey = "name";
const string startquoteKey = "startquote";
const string valueKey = "value";
const string endquoteKey = "endquote";
const string tagPatternFormat =
@"(?<" + startKey + @"><{0}\s+)(?<" + innerKey + @">.*?{1}=(?:""|').*?)(?<" + endKey + @">\s*/?>)";
const string attributePatternFormat =
@"(?<" + nameKey + @">{0}=)(?<" + startquoteKey + @">""|')(?<" + valueKey + @">.*?)(?<" +
endquoteKey + @">""|')";
var output = responseString;
foreach (var matchTag in matchTags)
{
var tag = matchTag.Tag;
var attribute = matchTag.Attribute;
var tagPattern = string.Format(tagPatternFormat, tag, attribute);
var tagRegex = new Regex(tagPattern);
output = tagRegex.Replace(responseString, tagMatch =>
{
var tagMatchGroups = tagMatch.Groups;
var tagStart = tagMatchGroups[startKey].Value;
var tagInnards = tagMatchGroups[innerKey].Value;
var tagEnd = tagMatchGroups[endKey].Value;
var attributePattern = string.Format(attributePatternFormat, attribute);
var attributeRegex = new Regex(attributePattern);
var newTagInnards = attributeRegex.Replace(tagInnards, attributeMatch =>
{
var attributeMatchGroups = attributeMatch.Groups;
var attributeValue = attributeMatchGroups[valueKey].Value;
var attributeValueRegex = new Regex(rewritePattern);
var attributeValueMatch = attributeValueRegex.Match(attributeValue);
if (attributeValueMatch.Success)
{
var attributeName = attributeMatchGroups[nameKey].Value;
var attributeStartQuote = attributeMatchGroups[startquoteKey].Value;
var attributeEndQuote = attributeMatchGroups[endquoteKey].Value;
// need to determine where the match occurs within the original string
var attributeValueMatchIndex = attributeValueMatch.Index;
var attributeValueMatchLength = attributeValueMatch.Length;
string attributeValueReplaced;
if (outboundRuleUsing == Using.ExactMatch)
{
attributeValueReplaced = attributeValueMatch.Value.Replace(
attributeValueMatch.Value, rewriteValue);
}
else
{
attributeValueReplaced = RewriteHelper.ReplaceRuleBackReferences(attributeValueMatch,
rewriteValue);
}
var newAttributeValue = attributeValue.Substring(0, attributeValueMatchIndex) +
attributeValueReplaced +
attributeValue.Substring(attributeValueMatchIndex +
attributeValueMatchLength);
var attributeOutput = attributeName + attributeStartQuote + newAttributeValue +
attributeEndQuote;
return(attributeOutput);
}
return(attributeMatch.Value);
});
var tagOutput = tagStart + newTagInnards + tagEnd;
return(tagOutput);
});
}
return(output);
}
