private unsafe List <GCHandle>?SerializeHeaders(bool isOpaqueUpgrade)
{
Headers.IsReadOnly = true; // Prohibit further modifications.
HttpApiTypes.HTTP_UNKNOWN_HEADER[]? unknownHeaders = null;
HttpApiTypes.HTTP_RESPONSE_INFO[]? knownHeaderInfo = null;
List <GCHandle> pinnedHeaders;
GCHandle gcHandle;
if (Headers.Count == 0)
{
return(null);
}
string headerName;
string headerValue;
int lookup;
byte[]? bytes = null;
pinnedHeaders = new List <GCHandle>();
int numUnknownHeaders = 0;
int numKnownMultiHeaders = 0;
foreach (var headerPair in Headers)
{
if (headerPair.Value.Count == 0)
{
continue;
}
// See if this is an unknown header
lookup = HttpApiTypes.HTTP_RESPONSE_HEADER_ID.IndexOfKnownHeader(headerPair.Key);
// Http.Sys doesn't let us send the Connection: Upgrade header as a Known header.
if (lookup == -1 ||
(isOpaqueUpgrade && lookup == (int)HttpApiTypes.HTTP_RESPONSE_HEADER_ID.Enum.HttpHeaderConnection))
{
numUnknownHeaders += headerPair.Value.Count;
}
else if (headerPair.Value.Count > 1)
{
numKnownMultiHeaders++;
}
// else known single-value header.
}
try
{
fixed(HttpApiTypes.HTTP_KNOWN_HEADER *pKnownHeaders = &_nativeResponse.Response_V1.Headers.KnownHeaders)
{
foreach (var headerPair in Headers)
{
if (headerPair.Value.Count == 0)
{
continue;
}
headerName = headerPair.Key;
StringValues headerValues = headerPair.Value;
lookup = HttpApiTypes.HTTP_RESPONSE_HEADER_ID.IndexOfKnownHeader(headerName);
// Http.Sys doesn't let us send the Connection: Upgrade header as a Known header.
if (lookup == -1 ||
(isOpaqueUpgrade && lookup == (int)HttpApiTypes.HTTP_RESPONSE_HEADER_ID.Enum.HttpHeaderConnection))
{
if (unknownHeaders == null)
{
unknownHeaders = new HttpApiTypes.HTTP_UNKNOWN_HEADER[numUnknownHeaders];
gcHandle = GCHandle.Alloc(unknownHeaders, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
_nativeResponse.Response_V1.Headers.pUnknownHeaders = (HttpApiTypes.HTTP_UNKNOWN_HEADER *)gcHandle.AddrOfPinnedObject();
}
for (int headerValueIndex = 0; headerValueIndex < headerValues.Count; headerValueIndex++)
{
// Add Name
bytes = HeaderEncoding.GetBytes(headerName);
unknownHeaders[_nativeResponse.Response_V1.Headers.UnknownHeaderCount].NameLength = (ushort)bytes.Length;
gcHandle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
unknownHeaders[_nativeResponse.Response_V1.Headers.UnknownHeaderCount].pName = (byte *)gcHandle.AddrOfPinnedObject();
// Add Value
headerValue = headerValues[headerValueIndex] ?? string.Empty;
bytes = HeaderEncoding.GetBytes(headerValue);
unknownHeaders[_nativeResponse.Response_V1.Headers.UnknownHeaderCount].RawValueLength = (ushort)bytes.Length;
gcHandle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
unknownHeaders[_nativeResponse.Response_V1.Headers.UnknownHeaderCount].pRawValue = (byte *)gcHandle.AddrOfPinnedObject();
_nativeResponse.Response_V1.Headers.UnknownHeaderCount++;
}
}
else if (headerPair.Value.Count == 1)
{
headerValue = headerValues[0] ?? string.Empty;
bytes = HeaderEncoding.GetBytes(headerValue);
pKnownHeaders[lookup].RawValueLength = (ushort)bytes.Length;
gcHandle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
pKnownHeaders[lookup].pRawValue = (byte *)gcHandle.AddrOfPinnedObject();
}
else
{
if (knownHeaderInfo == null)
{
knownHeaderInfo = new HttpApiTypes.HTTP_RESPONSE_INFO[numKnownMultiHeaders];
gcHandle = GCHandle.Alloc(knownHeaderInfo, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
_nativeResponse.pResponseInfo = (HttpApiTypes.HTTP_RESPONSE_INFO *)gcHandle.AddrOfPinnedObject();
}
knownHeaderInfo[_nativeResponse.ResponseInfoCount].Type = HttpApiTypes.HTTP_RESPONSE_INFO_TYPE.HttpResponseInfoTypeMultipleKnownHeaders;
knownHeaderInfo[_nativeResponse.ResponseInfoCount].Length = (uint)Marshal.SizeOf <HttpApiTypes.HTTP_MULTIPLE_KNOWN_HEADERS>();
HttpApiTypes.HTTP_MULTIPLE_KNOWN_HEADERS header = new HttpApiTypes.HTTP_MULTIPLE_KNOWN_HEADERS();
header.HeaderId = (HttpApiTypes.HTTP_RESPONSE_HEADER_ID.Enum)lookup;
header.Flags = HttpApiTypes.HTTP_RESPONSE_INFO_FLAGS.PreserveOrder; // TODO: The docs say this is for www-auth only.
HttpApiTypes.HTTP_KNOWN_HEADER[] nativeHeaderValues = new HttpApiTypes.HTTP_KNOWN_HEADER[headerValues.Count];
gcHandle = GCHandle.Alloc(nativeHeaderValues, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
header.KnownHeaders = (HttpApiTypes.HTTP_KNOWN_HEADER *)gcHandle.AddrOfPinnedObject();
for (int headerValueIndex = 0; headerValueIndex < headerValues.Count; headerValueIndex++)
{
// Add Value
headerValue = headerValues[headerValueIndex] ?? string.Empty;
bytes = HeaderEncoding.GetBytes(headerValue);
nativeHeaderValues[header.KnownHeaderCount].RawValueLength = (ushort)bytes.Length;
gcHandle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
nativeHeaderValues[header.KnownHeaderCount].pRawValue = (byte *)gcHandle.AddrOfPinnedObject();
header.KnownHeaderCount++;
}
// This type is a struct, not an object, so pinning it causes a boxed copy to be created. We can't do that until after all the fields are set.
gcHandle = GCHandle.Alloc(header, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
knownHeaderInfo[_nativeResponse.ResponseInfoCount].pInfo = (HttpApiTypes.HTTP_MULTIPLE_KNOWN_HEADERS *)gcHandle.AddrOfPinnedObject();
_nativeResponse.ResponseInfoCount++;
}
}
}
}
catch
{
FreePinnedHeaders(pinnedHeaders);
throw;
}
return(pinnedHeaders);
}
internal unsafe void SendError(ulong requestId, int httpStatusCode, IList <string>?authChallenges = null)
{
HttpApiTypes.HTTP_RESPONSE_V2 httpResponse = new HttpApiTypes.HTTP_RESPONSE_V2();
httpResponse.Response_V1.Version = new HttpApiTypes.HTTP_VERSION();
httpResponse.Response_V1.Version.MajorVersion = (ushort)1;
httpResponse.Response_V1.Version.MinorVersion = (ushort)1;
List <GCHandle>?pinnedHeaders = null;
GCHandle gcHandle;
try
{
// Copied from the multi-value headers section of SerializeHeaders
if (authChallenges != null && authChallenges.Count > 0)
{
pinnedHeaders = new List <GCHandle>(authChallenges.Count + 3);
HttpApiTypes.HTTP_RESPONSE_INFO[] knownHeaderInfo = new HttpApiTypes.HTTP_RESPONSE_INFO[1];
gcHandle = GCHandle.Alloc(knownHeaderInfo, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
httpResponse.pResponseInfo = (HttpApiTypes.HTTP_RESPONSE_INFO *)gcHandle.AddrOfPinnedObject();
knownHeaderInfo[httpResponse.ResponseInfoCount].Type = HttpApiTypes.HTTP_RESPONSE_INFO_TYPE.HttpResponseInfoTypeMultipleKnownHeaders;
knownHeaderInfo[httpResponse.ResponseInfoCount].Length =
(uint)Marshal.SizeOf <HttpApiTypes.HTTP_MULTIPLE_KNOWN_HEADERS>();
HttpApiTypes.HTTP_MULTIPLE_KNOWN_HEADERS header = new HttpApiTypes.HTTP_MULTIPLE_KNOWN_HEADERS();
header.HeaderId = HttpApiTypes.HTTP_RESPONSE_HEADER_ID.Enum.HttpHeaderWwwAuthenticate;
header.Flags = HttpApiTypes.HTTP_RESPONSE_INFO_FLAGS.PreserveOrder; // The docs say this is for www-auth only.
HttpApiTypes.HTTP_KNOWN_HEADER[] nativeHeaderValues = new HttpApiTypes.HTTP_KNOWN_HEADER[authChallenges.Count];
gcHandle = GCHandle.Alloc(nativeHeaderValues, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
header.KnownHeaders = (HttpApiTypes.HTTP_KNOWN_HEADER *)gcHandle.AddrOfPinnedObject();
for (int headerValueIndex = 0; headerValueIndex < authChallenges.Count; headerValueIndex++)
{
// Add Value
string headerValue = authChallenges[headerValueIndex];
byte[] bytes = HeaderEncoding.GetBytes(headerValue);
nativeHeaderValues[header.KnownHeaderCount].RawValueLength = (ushort)bytes.Length;
gcHandle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
nativeHeaderValues[header.KnownHeaderCount].pRawValue = (byte *)gcHandle.AddrOfPinnedObject();
header.KnownHeaderCount++;
}
// This type is a struct, not an object, so pinning it causes a boxed copy to be created. We can't do that until after all the fields are set.
gcHandle = GCHandle.Alloc(header, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
knownHeaderInfo[0].pInfo = (HttpApiTypes.HTTP_MULTIPLE_KNOWN_HEADERS *)gcHandle.AddrOfPinnedObject();
httpResponse.ResponseInfoCount = 1;
}
httpResponse.Response_V1.StatusCode = (ushort)httpStatusCode;
string?statusDescription = HttpReasonPhrase.Get(httpStatusCode);
uint dataWritten = 0;
uint statusCode;
byte[] byteReason = statusDescription != null?HeaderEncoding.GetBytes(statusDescription) : Array.Empty <byte>();
fixed(byte *pReason = byteReason)
{
httpResponse.Response_V1.pReason = (byte *)pReason;
httpResponse.Response_V1.ReasonLength = (ushort)byteReason.Length;
byte[] byteContentLength = new byte[] { (byte)'0' };
fixed(byte *pContentLength = byteContentLength)
{
(&httpResponse.Response_V1.Headers.KnownHeaders)[(int)HttpSysResponseHeader.ContentLength].pRawValue = (byte *)pContentLength;
(&httpResponse.Response_V1.Headers.KnownHeaders)[(int)HttpSysResponseHeader.ContentLength].RawValueLength = (ushort)byteContentLength.Length;
httpResponse.Response_V1.Headers.UnknownHeaderCount = 0;
statusCode =
HttpApi.HttpSendHttpResponse(
_requestQueue.Handle,
requestId,
0,
&httpResponse,
null,
&dataWritten,
IntPtr.Zero,
0,
SafeNativeOverlapped.Zero,
IntPtr.Zero);
}
}
if (statusCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS)
{
// if we fail to send a 401 something's seriously wrong, abort the request
HttpApi.HttpCancelHttpRequest(_requestQueue.Handle, requestId, IntPtr.Zero);
}
}
finally
{
if (pinnedHeaders != null)
{
foreach (GCHandle handle in pinnedHeaders)
{
if (handle.IsAllocated)
{
handle.Free();
}
}
}
}
}
// From HttpSys, except does not write to response
private unsafe List <GCHandle> SerializeHeaders(HttpApiTypes.HTTP_RESPONSE_V2 *pHttpResponse)
{
HttpResponseHeaders.IsReadOnly = true;
HttpApiTypes.HTTP_UNKNOWN_HEADER[] unknownHeaders = null;
HttpApiTypes.HTTP_RESPONSE_INFO[] knownHeaderInfo = null;
var pinnedHeaders = new List <GCHandle>();
GCHandle gcHandle;
if (HttpResponseHeaders.Count == 0)
{
return(null);
}
string headerName;
string headerValue;
int lookup;
var numUnknownHeaders = 0;
int numKnownMultiHeaders = 0;
byte[] bytes = null;
foreach (var headerPair in HttpResponseHeaders)
{
if (headerPair.Value.Count == 0)
{
continue;
}
lookup = HttpApiTypes.HTTP_RESPONSE_HEADER_ID.IndexOfKnownHeader(headerPair.Key);
if (lookup == -1) // TODO handle opaque stream upgrade?
{
numUnknownHeaders++;
}
else if (headerPair.Value.Count > 1)
{
numKnownMultiHeaders++;
}
}
try
{
var pKnownHeaders = &pHttpResponse->Response_V1.Headers.KnownHeaders;
foreach (var headerPair in HttpResponseHeaders)
{
if (headerPair.Value.Count == 0)
{
continue;
}
headerName = headerPair.Key;
StringValues headerValues = headerPair.Value;
lookup = HttpApiTypes.HTTP_RESPONSE_HEADER_ID.IndexOfKnownHeader(headerName);
if (lookup == -1)
{
if (unknownHeaders == null)
{
unknownHeaders = new HttpApiTypes.HTTP_UNKNOWN_HEADER[numUnknownHeaders];
gcHandle = GCHandle.Alloc(unknownHeaders, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
pHttpResponse->Response_V1.Headers.pUnknownHeaders = (HttpApiTypes.HTTP_UNKNOWN_HEADER *)gcHandle.AddrOfPinnedObject();
pHttpResponse->Response_V1.Headers.UnknownHeaderCount = 0; // to remove the iis header for server=...
}
for (var headerValueIndex = 0; headerValueIndex < headerValues.Count; headerValueIndex++)
{
// Add Name
bytes = HeaderEncoding.GetBytes(headerName);
unknownHeaders[pHttpResponse->Response_V1.Headers.UnknownHeaderCount].NameLength = (ushort)bytes.Length;
gcHandle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
unknownHeaders[pHttpResponse->Response_V1.Headers.UnknownHeaderCount].pName = (byte *)gcHandle.AddrOfPinnedObject();
// Add Value
headerValue = headerValues[headerValueIndex] ?? string.Empty;
bytes = HeaderEncoding.GetBytes(headerValue);
unknownHeaders[pHttpResponse->Response_V1.Headers.UnknownHeaderCount].RawValueLength = (ushort)bytes.Length;
gcHandle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
unknownHeaders[pHttpResponse->Response_V1.Headers.UnknownHeaderCount].pRawValue = (byte *)gcHandle.AddrOfPinnedObject();
pHttpResponse->Response_V1.Headers.UnknownHeaderCount++;
}
}
else if (headerPair.Value.Count == 1)
{
headerValue = headerValues[0] ?? string.Empty;
bytes = HeaderEncoding.GetBytes(headerValue);
pKnownHeaders[lookup].RawValueLength = (ushort)bytes.Length;
gcHandle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
pKnownHeaders[lookup].pRawValue = (byte *)gcHandle.AddrOfPinnedObject();
}
else
{
if (knownHeaderInfo == null)
{
knownHeaderInfo = new HttpApiTypes.HTTP_RESPONSE_INFO[numKnownMultiHeaders];
gcHandle = GCHandle.Alloc(knownHeaderInfo, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
pHttpResponse->pResponseInfo = (HttpApiTypes.HTTP_RESPONSE_INFO *)gcHandle.AddrOfPinnedObject();
}
knownHeaderInfo[pHttpResponse->ResponseInfoCount].Type = HttpApiTypes.HTTP_RESPONSE_INFO_TYPE.HttpResponseInfoTypeMultipleKnownHeaders;
knownHeaderInfo[pHttpResponse->ResponseInfoCount].Length = (uint)Marshal.SizeOf <HttpApiTypes.HTTP_MULTIPLE_KNOWN_HEADERS>();
var header = new HttpApiTypes.HTTP_MULTIPLE_KNOWN_HEADERS();
header.HeaderId = (HttpApiTypes.HTTP_RESPONSE_HEADER_ID.Enum)lookup;
header.Flags = HttpApiTypes.HTTP_RESPONSE_INFO_FLAGS.PreserveOrder; // TODO: The docs say this is for www-auth only.
var nativeHeaderValues = new HttpApiTypes.HTTP_KNOWN_HEADER[headerValues.Count];
gcHandle = GCHandle.Alloc(nativeHeaderValues, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
header.KnownHeaders = (HttpApiTypes.HTTP_KNOWN_HEADER *)gcHandle.AddrOfPinnedObject();
for (int headerValueIndex = 0; headerValueIndex < headerValues.Count; headerValueIndex++)
{
// Add Value
headerValue = headerValues[headerValueIndex] ?? string.Empty;
bytes = HeaderEncoding.GetBytes(headerValue);
nativeHeaderValues[header.KnownHeaderCount].RawValueLength = (ushort)bytes.Length;
gcHandle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
nativeHeaderValues[header.KnownHeaderCount].pRawValue = (byte *)gcHandle.AddrOfPinnedObject();
header.KnownHeaderCount++;
}
// This type is a struct, not an object, so pinning it causes a boxed copy to be created. We can't do that until after all the fields are set.
gcHandle = GCHandle.Alloc(header, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
knownHeaderInfo[pHttpResponse->ResponseInfoCount].pInfo = (HttpApiTypes.HTTP_MULTIPLE_KNOWN_HEADERS *)gcHandle.AddrOfPinnedObject();
pHttpResponse->ResponseInfoCount++;
}
}
}
catch (Exception)
{
FreePinnedHeaders(pinnedHeaders);
throw;
}
return(pinnedHeaders);
}
