internal bool CheckPrecondition(HttpContextBase httpContext, OutboundRule outboundRule)
{
Match lastConditionMatch = null;
bool isPreconditionMatch = true;
if (outboundRule == null)
{
return(isPreconditionMatch);
}
var precondition = outboundRule.Precondition;
if (precondition == null)
{
return(isPreconditionMatch);
}
var conditions = precondition.Conditions;
// test conditions matches
if (conditions != null && conditions.Any())
{
var replacements = new RewriteHelper.Replacements
{
RequestServerVariables = httpContext.Request.ServerVariables,
RequestHeaders = httpContext.Request.Headers,
ResponseHeaders = httpContext.Response.Headers
};
var conditionMatchResult = RewriteHelper.TestConditionMatches(precondition, replacements, out lastConditionMatch);
isPreconditionMatch = conditionMatchResult.Matched;
}
return(isPreconditionMatch);
}
private void ProcessRewriteAction(InboundRule inboundRule, Uri uri, Match inboundRuleMatch, Match lastConditionMatch, InboundRuleResult ruleResult)
{
var redirectAction = inboundRule.Action as Rewrite;
var rewriteUrl = redirectAction.RewriteUrl;
var rewriteItemAnchor = redirectAction.RewriteItemAnchor;
if (string.IsNullOrEmpty(rewriteUrl))
{
ruleResult.RuleMatched = false;
return;
}
// process token replacements
var replacements = new RewriteHelper.Replacements
{
RequestHeaders = RequestHeaders,
RequestServerVariables = RequestServerVariables
};
rewriteUrl = RewriteHelper.ReplaceTokens(replacements, rewriteUrl);
if (redirectAction.AppendQueryString)
{
rewriteUrl += uri.Query;
}
rewriteUrl = RewriteHelper.ReplaceRuleBackReferences(inboundRuleMatch, rewriteUrl);
rewriteUrl = RewriteHelper.ReplaceConditionBackReferences(lastConditionMatch, rewriteUrl);
ruleResult.RewrittenUri = new Uri(rewriteUrl);
ruleResult.StopProcessing = redirectAction.StopProcessingOfSubsequentRules;
}
internal PreconditionResult CheckPreconditions(HttpContextBase httpContext, List <OutboundRule> outboundRules)
{
Match lastConditionMatch = null;
bool isPreconditionMatch = false;
var preconditions = outboundRules.Select(p => p.Precondition)
.Where(p => p != null);
foreach (var precondition in preconditions)
{
var conditions = precondition.Conditions;
// test conditions matches
if (conditions != null && conditions.Any())
{
var replacements = new RewriteHelper.Replacements
{
RequestServerVariables = httpContext.Request.ServerVariables,
RequestHeaders = httpContext.Request.Headers,
ResponseHeaders = httpContext.Response.Headers
};
var conditionMatchResult = RewriteHelper.TestConditionMatches(precondition, replacements, out lastConditionMatch);
isPreconditionMatch = conditionMatchResult.Matched;
}
}
var result = new PreconditionResult {
Passed = isPreconditionMatch
};
return(result);
}
private OutboundRuleResult ProcessRegularExpressionOutboundRule(OutboundRuleResult ruleResult, OutboundRule outboundRule)
{
Match outboundRuleMatch,
lastConditionMatch = null;
// test rule match
var isRuleMatch = true;
ConditionMatchResult conditionMatchResult = null;
// test conditions matches
if (outboundRule.Conditions != null && outboundRule.Conditions.Any())
{
var replacements = new RewriteHelper.Replacements
{
RequestHeaders = RequestHeaders,
RequestServerVariables = RequestServerVariables,
ResponseHeaders = ResponseHeaders
};
conditionMatchResult = RewriteHelper.TestConditionMatches(outboundRule, replacements, out lastConditionMatch);
isRuleMatch = conditionMatchResult.Matched;
}
if (isRuleMatch)
{
ruleResult.RewrittenResponseString = ProcessRuleReplacements(ruleResult.OriginalResponseString, outboundRule);
ruleResult.RuleMatched = true;
}
return(ruleResult);
}
public void ReplaceTokens()
{
// arrange
var replacements = new RewriteHelper.Replacements()
{
RequestServerVariables = new NameValueCollection()
{
{ "HTTPS", "off" },
{ "HTTP_HOST", "www.iamandycohen.com"},
{ "QUERY_STRING", "var1=1&var2=2"},
},
RequestHeaders = new NameValueCollection()
{
{ "X-Custom-Header", "This is a test"}
},
ResponseHeaders = new NameValueCollection()
{
{ "Content-Type", @"text/html"}
}
};
var inputString = "test {QUERY_STRING} test {REQUEST_X_Custom_Header} test {RESPONSE_Content_Type} test {HTTPS} test";
// act
var replacementOutput = RewriteHelper.ReplaceTokens(replacements, inputString);
// assert
Assert.AreEqual(replacementOutput, @"test var1=1&var2=2 test This is a test test text/html test off test");
}
private void ProcessItemQueryRedirectAction(InboundRule inboundRule, Uri uri, Match inboundRuleMatch, Match lastConditionMatch, InboundRuleResult ruleResult)
{
var redirectAction = inboundRule.Action as ItemQueryRedirect;
var itemQuery = redirectAction.ItemQuery;
if (string.IsNullOrEmpty(itemQuery))
{
ruleResult.RuleMatched = false;
return;
}
// process token replacements in the item query
itemQuery = RewriteHelper.ReplaceRuleBackReferences(inboundRuleMatch, itemQuery);
itemQuery = RewriteHelper.ReplaceConditionBackReferences(lastConditionMatch, itemQuery);
var rewriteItemId = ExecuteItemQuery(itemQuery);
if (!rewriteItemId.HasValue)
{
ruleResult.RuleMatched = false;
return;
}
string rewriteUrl = GetRewriteUrlFromItemId(rewriteItemId.Value, null, null);
// process token replacements
var replacements = new RewriteHelper.Replacements
{
RequestHeaders = RequestHeaders,
RequestServerVariables = RequestServerVariables
};
rewriteUrl = RewriteHelper.ReplaceTokens(replacements, rewriteUrl);
rewriteUrl = RewriteHelper.ReplaceRuleBackReferences(inboundRuleMatch, rewriteUrl);
rewriteUrl = RewriteHelper.ReplaceConditionBackReferences(lastConditionMatch, rewriteUrl);
ruleResult.RewrittenUri = new Uri(rewriteUrl);
ruleResult.StopProcessing = redirectAction.StopProcessingOfSubsequentRules;
}
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);
}
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();
}
internal bool CheckPrecondition(HttpContextBase httpContext, OutboundRule outboundRule)
{
Match lastConditionMatch = null;
bool isPreconditionMatch = true;
if (outboundRule == null) return isPreconditionMatch;
var precondition = outboundRule.Precondition;
if (precondition == null) return isPreconditionMatch;
var conditions = precondition.Conditions;
// test conditions matches
if (conditions != null && conditions.Any())
{
var replacements = new RewriteHelper.Replacements
{
RequestServerVariables = httpContext.Request.ServerVariables,
RequestHeaders = httpContext.Request.Headers,
ResponseHeaders = httpContext.Response.Headers
};
var conditionMatchResult = RewriteHelper.TestConditionMatches(precondition, replacements, out lastConditionMatch);
isPreconditionMatch = conditionMatchResult.Matched;
}
return isPreconditionMatch;
}
internal PreconditionResult CheckPreconditions(HttpContextBase httpContext, List<OutboundRule> outboundRules)
{
Match lastConditionMatch = null;
bool isPreconditionMatch = false;
var preconditions = outboundRules.Select(p => p.Precondition)
.Where(p => p != null);
foreach (var precondition in preconditions)
{
var conditions = precondition.Conditions;
// test conditions matches
if (conditions != null && conditions.Any())
{
var replacements = new RewriteHelper.Replacements
{
RequestServerVariables = httpContext.Request.ServerVariables,
RequestHeaders = httpContext.Request.Headers,
ResponseHeaders = httpContext.Response.Headers
};
var conditionMatchResult = RewriteHelper.TestConditionMatches(precondition, replacements, out lastConditionMatch);
isPreconditionMatch = conditionMatchResult.Matched;
}
}
var result = new PreconditionResult { Passed = isPreconditionMatch };
return result;
}
private OutboundRuleResult ProcessRegularExpressionOutboundRule(OutboundRuleResult ruleResult, OutboundRule outboundRule)
{
Match outboundRuleMatch,
lastConditionMatch = null;
// test rule match
var isRuleMatch = true;
ConditionMatchResult conditionMatchResult = null;
// test conditions matches
if (outboundRule.Conditions != null && outboundRule.Conditions.Any())
{
var replacements = new RewriteHelper.Replacements
{
RequestHeaders = RequestHeaders,
RequestServerVariables = RequestServerVariables,
ResponseHeaders = ResponseHeaders
};
conditionMatchResult = RewriteHelper.TestConditionMatches(outboundRule, replacements, out lastConditionMatch);
isRuleMatch = conditionMatchResult.Matched;
}
if (isRuleMatch)
{
ruleResult.RewrittenResponseString = ProcessRuleReplacements(ruleResult.OriginalResponseString, outboundRule);
ruleResult.RuleMatched = true;
}
return ruleResult;
}
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)
{
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);
}
//ReportingService.QueueReport(ruleResult.ProcessedResults.Where(e => e.RuleMatched), Sitecore.Context.Database);
}
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 void ProcessRewriteAction(InboundRule inboundRule, Uri uri, Match inboundRuleMatch, Match lastConditionMatch, InboundRuleResult ruleResult)
{
var redirectAction = inboundRule.Action as Rewrite;
var rewriteUrl = redirectAction.RewriteUrl;
var rewriteItemId = redirectAction.RewriteItemId;
var rewriteItemAnchor = redirectAction.RewriteItemAnchor;
if (string.IsNullOrEmpty(rewriteUrl) && rewriteItemId == null)
{
ruleResult.RuleMatched = false;
return;
}
if (rewriteItemId.HasValue)
{
rewriteUrl = GetRewriteUrlFromItemId(rewriteItemId.Value, rewriteItemAnchor);
}
// process token replacements
var replacements = new RewriteHelper.Replacements
{
RequestHeaders = RequestHeaders,
RequestServerVariables = RequestServerVariables
};
rewriteUrl = RewriteHelper.ReplaceTokens(replacements, rewriteUrl);
if (redirectAction.AppendQueryString)
{
rewriteUrl += uri.Query;
}
rewriteUrl = RewriteHelper.ReplaceRuleBackReferences(inboundRuleMatch, rewriteUrl);
rewriteUrl = RewriteHelper.ReplaceConditionBackReferences(lastConditionMatch, rewriteUrl);
ruleResult.RewrittenUri = new Uri(rewriteUrl);
ruleResult.StopProcessing = redirectAction.StopProcessingOfSubsequentRules;
}
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 void ProcessItemQueryRedirectAction(InboundRule inboundRule, Uri uri, Match inboundRuleMatch, Match lastConditionMatch, InboundRuleResult ruleResult)
{
var redirectAction = inboundRule.Action as ItemQueryRedirect;
var itemQuery = redirectAction.ItemQuery;
if (string.IsNullOrEmpty(itemQuery))
{
ruleResult.RuleMatched = false;
return;
}
// process token replacements in the item query
itemQuery = RewriteHelper.ReplaceRuleBackReferences(inboundRuleMatch, itemQuery);
itemQuery = RewriteHelper.ReplaceConditionBackReferences(lastConditionMatch, itemQuery);
var rewriteItemId = ExecuteItemQuery(itemQuery);
if (!rewriteItemId.HasValue)
{
ruleResult.RuleMatched = false;
return;
}
string rewriteUrl = GetRewriteUrlFromItemId(rewriteItemId.Value, null);
// process token replacements
var replacements = new RewriteHelper.Replacements
{
RequestHeaders = RequestHeaders,
RequestServerVariables = RequestServerVariables
};
rewriteUrl = RewriteHelper.ReplaceTokens(replacements, rewriteUrl);
rewriteUrl = RewriteHelper.ReplaceRuleBackReferences(inboundRuleMatch, rewriteUrl);
rewriteUrl = RewriteHelper.ReplaceConditionBackReferences(lastConditionMatch, rewriteUrl);
ruleResult.RewrittenUri = new Uri(rewriteUrl);
ruleResult.StopProcessing = redirectAction.StopProcessingOfSubsequentRules;
}
