protected virtual void TransformRequestHeaders(NameValueCollection leftSideHeaders, WebHeaderCollection rightSideHeaders)
{
foreach (string headerName in leftSideHeaders)
{
var h = headerName.ToLowerInvariant();
string headerValue = leftSideHeaders[headerName];
if (HandlePvpHeader(headerName, headerValue, rightSideHeaders))
{
continue;
}
if (s_headersToRemove.Contains(h))
{
TraceScope.Current.TraceEvent(System.Diagnostics.TraceEventType.Verbose,
(int)Event.TransformRequest,
"Removing Header {0}.", headerName);
continue;
}
switch (h)
{
case "connection":
case "date":
case "host":
//Restricted Header
TraceScope.Current.TraceEvent(System.Diagnostics.TraceEventType.Verbose,
(int)Event.TransformRequest,
"Ignoring Header {0}.", headerName);
break;
case "authorization":
bool remove = false;
if (s_authorizationToRemove != null)
{
foreach (string authorizationType in s_authorizationToRemove)
{
if (!String.IsNullOrEmpty(authorizationType) &&
headerValue.StartsWith(authorizationType))
{
remove = true;
break;
}
}
}
if (!remove)
{
rightSideHeaders.Add(headerName, headerValue);
}
break;
case "keep-alive":
// true is default _rightSideRequest.KeepAlive = true;
break;
case "transfer-encoding":
if (String.Equals(headerValue, "chunked", StringComparison.InvariantCultureIgnoreCase))
{
_rightSideRequest.SendChunked = true;
}
else
{
_rightSideRequest.TransferEncoding = headerValue;
}
break;
case "content-length":
_rightSideRequest.ContentLength = _leftSideRequest.ContentLength;
break;
case "content-type":
_rightSideRequest.ContentType = _leftSideRequest.ContentType;
break;
case "accept":
_rightSideRequest.Accept = headerValue;
break;
case "cookie":
TraceScope.Current.TraceEvent(System.Diagnostics.TraceEventType.Verbose,
(int)Event.TransformRequest, "Transforming Cookies");
CookieTransformer cookieTransformer = new CookieTransformer(_isolateCookies, _targetRootUrl);
_rightSideRequest.CookieContainer.Add(cookieTransformer.GetRightSideRequestCookies(_leftSideRequest));
break;
case "expect":
string val = headerValue;
if (val.ToLowerInvariant() == "100-continue")
{
_rightSideRequest.ServicePoint.Expect100Continue = true;
}
else
{
_rightSideRequest.Expect = headerValue;
}
break;
case "if-modified-since":
_rightSideRequest.IfModifiedSince = DateTime.Parse(headerValue);
break;
case "referer":
_rightSideRequest.Referer = headerValue;
break;
case "range":
string rangeValue = headerValue;
string[] rangeParts = rangeValue.Split('=');
string rangeType;
if (rangeParts.Length >= 2)
{
rangeType = rangeParts[0];
foreach (string range in rangeParts[1].Split(','))
{
string[] limits = range.Split('-');
if (limits.Length >= 2)
{
TraceScope.Current.TraceEvent(System.Diagnostics.TraceEventType.Verbose, (int)Event.TransformRequest,
"Transforming Range Header {0}.", range);
if (limits[0].Length > 0 && limits[1].Length > 0)
{
_rightSideRequest.AddRange(rangeType, Int32.Parse(limits[0]), Int32.Parse(limits[1]));
}
else if (limits[0].Length > 0 && limits[1].Length == 0)
{
_rightSideRequest.AddRange(Int32.Parse(limits[0]) * (-1));
}
else if (limits[0].Length == 0 && limits[1].Length > 0)
{
_rightSideRequest.AddRange(Int32.Parse(limits[1]));
}
else
{
TraceScope.Current.TraceEvent(System.Diagnostics.TraceEventType.Verbose,
(int)Event.TransformRequest, "Error Transforming Range Header {0}.",
range);
throw new HttpParseException("range header not understood: " + rangeValue);
}
}
else
{
TraceScope.Current.TraceEvent(System.Diagnostics.TraceEventType.Verbose,
(int)Event.TransformRequest, "Error Transforming Range Header {0}.", range);
throw new HttpParseException("range header not understood: " + rangeValue);
}
}
}
break;
case "user-agent":
_rightSideRequest.UserAgent = _leftSideRequest.UserAgent;
break;
case "from":
if (!Settings.Default.UseFromHeader)
{
rightSideHeaders.Add(headerName, headerValue);
}
break;
// all other Headers not handled yet are copied 1:1
default:
rightSideHeaders.Add(headerName, headerValue);
break;
}
}
}
protected virtual void TransformResponseHeaders()
{
var cookiesWithEmptyPath = new List <string>();
for (int i = 0; i < _rightSideResponse.Headers.Count; i++)
//foreach (string headerName in _rightSideResponse.Headers)
{
var headerName = _rightSideResponse.Headers.GetKey(i);
var headerValues = _rightSideResponse.Headers.GetValues(i);
foreach (var headerValue in headerValues.Length > 0 ? headerValues : new string[] { null })
{
switch (headerName.ToLowerInvariant())
{
// Do nothing
case "keep-alive":
case "content-length":
case "range":
TraceScope.Current.TraceEvent(System.Diagnostics.TraceEventType.Verbose,
(int)Event.TransformResponse,
"Ignoring Header {0} with value {1}.", headerName,
headerValue);
break;
case "transfer-encoding":
//if (String.Equals(headerValue, "chunked", StringComparison.InvariantCultureIgnoreCase))
// _leftSideResponse.SendChunked = true;
// else if (String.Equals(headerValue, "compress, deflate, gzip, identity", StringComparison.InvariantCultureIgnoreCase))
// else do nothing
break;
// Cookies
case "set-cookie":
case "set-cookie2":
TraceScope.Current.TraceEvent(System.Diagnostics.TraceEventType.Verbose,
(int)Event.TransformResponse,
"Transforming Cookies.");
var cookieName = GetCookieName(headerValue);
if (cookieName == null)
{
break;
}
var hasPath = headerValue.IndexOf("path=", StringComparison.InvariantCultureIgnoreCase);
if (hasPath == -1)
{
cookiesWithEmptyPath.Add(cookieName);
}
break;
//Location
case "location":
string location = LocationTransformer.AdjustPath(headerValue);
TraceScope.Current.TraceEvent(System.Diagnostics.TraceEventType.Verbose,
(int)Event.TransformResponse,
"Transforming Location Header from {0} to {1}.",
headerValue, location);
_leftSideResponse.AddHeader(headerName, location);
break;
// all other Headers not handled yet are copied 1:1
default:
TraceScope.Current.TraceEvent(System.Diagnostics.TraceEventType.Verbose,
(int)Event.TransformResponse,
"Copy Header {0} with value {1}.", headerName,
headerValue);
_leftSideResponse.AddHeader(headerName, headerValue);
break;
}
}
}
CookieTransformer cookieTransformer = new CookieTransformer(_isolateCookies, _targetRootUrl, _rightSideResponse.ResponseUri);
// https://github.com/dotnet/corefx/issues/19166
// wenn Cookie Path empty, dann sollte current Path herangezogen werden.
// Beispiel Url = https://pamgate2.portal.at/at.gv.bmvit.uhs_p/uhs_c/f?p=blablabla
// Path sollte sein https://pamgate2.portal.at/at.gv.bmvit.uhs_p/uhs_c
// Path ist aber https://pamgate2.portal.at/at.gv.bmvit.uhs_p/uhs_c/f
// daher wird Cookie nicht zurückgeliefert
foreach (HttpCookie cookie in cookieTransformer.GetLeftSideResponseCookies(_rightSideResponse.Cookies, cookiesWithEmptyPath))
{
_leftSideResponse.Cookies.Add(cookie);
}
}