private string GetKnowHeaderHelper(HttpSysRequestHeader header, long fixup, HttpApiTypes.HTTP_REQUEST *request)
{
int headerIndex = (int)header;
string value = null;
HttpApiTypes.HTTP_KNOWN_HEADER *pKnownHeader = (&request->Headers.KnownHeaders) + headerIndex;
// For known headers, when header value is empty, RawValueLength will be 0 and
// pRawValue will point to empty string ("\0")
if (pKnownHeader->RawValueLength > 0)
{
value = HeaderEncoding.GetString(pKnownHeader->pRawValue + fixup, pKnownHeader->RawValueLength);
}
return(value);
}
// These methods are for accessing the request structure after it has been unpinned. They need to adjust addresses
// in case GC has moved the original object.
internal string GetKnownHeader(HttpSysRequestHeader header)
{
if (_permanentlyPinned)
{
return(GetKnowHeaderHelper(header, 0, _nativeRequest));
}
else
{
fixed(byte *pMemoryBlob = _backingBuffer)
{
var request = (HttpApiTypes.HTTP_REQUEST *)(pMemoryBlob + _bufferAlignment);
long fixup = pMemoryBlob - (byte *)_originalBufferAddress;
return(GetKnowHeaderHelper(header, fixup, request));
}
}
}
private string?GetKnownHeader(HttpSysRequestHeader header)
{
return(_requestMemoryBlob.GetKnownHeader(header));
}
private string GetKnownHeader(HttpSysRequestHeader header)
{
return(UnsafeNclNativeMethods.HttpApi.GetKnownHeader(_requestMemoryBlob.RequestBuffer,
_requestMemoryBlob.OriginalBlobAddress, (int)header));
}
