private List <GCHandle> SerializeHeaders(bool isOpaqueUpgrade)
{
Headers.IsReadOnly = true; // Prohibit further modifications.
HttpApi.HTTP_UNKNOWN_HEADER[] unknownHeaders = null;
HttpApi.HTTP_RESPONSE_INFO[] knownHeaderInfo = null;
List <GCHandle> pinnedHeaders;
GCHandle gcHandle;
/*
* // here we would check for BoundaryType.Raw, in this case we wouldn't need to do anything
* if (m_BoundaryType==BoundaryType.Raw) {
* return null;
* }
*/
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 = HttpApi.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)HttpApi.HTTP_RESPONSE_HEADER_ID.Enum.HttpHeaderConnection))
{
numUnknownHeaders += headerPair.Value.Count;
}
else if (headerPair.Value.Count > 1)
{
numKnownMultiHeaders++;
}
// else known single-value header.
}
try
{
fixed(HttpApi.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 = HttpApi.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)HttpApi.HTTP_RESPONSE_HEADER_ID.Enum.HttpHeaderConnection))
{
if (unknownHeaders == null)
{
unknownHeaders = new HttpApi.HTTP_UNKNOWN_HEADER[numUnknownHeaders];
gcHandle = GCHandle.Alloc(unknownHeaders, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
_nativeResponse.Response_V1.Headers.pUnknownHeaders = (HttpApi.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 = (sbyte *)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 = (sbyte *)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 = (sbyte *)gcHandle.AddrOfPinnedObject();
}
else
{
if (knownHeaderInfo == null)
{
knownHeaderInfo = new HttpApi.HTTP_RESPONSE_INFO[numKnownMultiHeaders];
gcHandle = GCHandle.Alloc(knownHeaderInfo, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
_nativeResponse.pResponseInfo = (HttpApi.HTTP_RESPONSE_INFO *)gcHandle.AddrOfPinnedObject();
}
knownHeaderInfo[_nativeResponse.ResponseInfoCount].Type = HttpApi.HTTP_RESPONSE_INFO_TYPE.HttpResponseInfoTypeMultipleKnownHeaders;
knownHeaderInfo[_nativeResponse.ResponseInfoCount].Length = (uint)Marshal.SizeOf <HttpApi.HTTP_MULTIPLE_KNOWN_HEADERS>();
HttpApi.HTTP_MULTIPLE_KNOWN_HEADERS header = new HttpApi.HTTP_MULTIPLE_KNOWN_HEADERS();
header.HeaderId = (HttpApi.HTTP_RESPONSE_HEADER_ID.Enum)lookup;
header.Flags = HttpApi.HTTP_RESPONSE_INFO_FLAGS.PreserveOrder; // TODO: The docs say this is for www-auth only.
HttpApi.HTTP_KNOWN_HEADER[] nativeHeaderValues = new HttpApi.HTTP_KNOWN_HEADER[headerValues.Count];
gcHandle = GCHandle.Alloc(nativeHeaderValues, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
header.KnownHeaders = (HttpApi.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 = (sbyte *)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 = (HttpApi.HTTP_MULTIPLE_KNOWN_HEADERS *)gcHandle.AddrOfPinnedObject();
_nativeResponse.ResponseInfoCount++;
}
}
}
}
catch
{
FreePinnedHeaders(pinnedHeaders);
throw;
}
return(pinnedHeaders);
}
private unsafe void SendError(ulong requestId, HttpStatusCode httpStatusCode, IList <string> authChallenges)
{
UnsafeNclNativeMethods.HttpApi.HTTP_RESPONSE_V2 httpResponse = new UnsafeNclNativeMethods.HttpApi.HTTP_RESPONSE_V2();
httpResponse.Response_V1.Version = new UnsafeNclNativeMethods.HttpApi.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>();
UnsafeNclNativeMethods.HttpApi.HTTP_RESPONSE_INFO[] knownHeaderInfo = null;
knownHeaderInfo = new UnsafeNclNativeMethods.HttpApi.HTTP_RESPONSE_INFO[1];
gcHandle = GCHandle.Alloc(knownHeaderInfo, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
httpResponse.pResponseInfo = (UnsafeNclNativeMethods.HttpApi.HTTP_RESPONSE_INFO *)gcHandle.AddrOfPinnedObject();
knownHeaderInfo[httpResponse.ResponseInfoCount].Type = UnsafeNclNativeMethods.HttpApi.HTTP_RESPONSE_INFO_TYPE.HttpResponseInfoTypeMultipleKnownHeaders;
knownHeaderInfo[httpResponse.ResponseInfoCount].Length =
(uint)Marshal.SizeOf <UnsafeNclNativeMethods.HttpApi.HTTP_MULTIPLE_KNOWN_HEADERS>();
UnsafeNclNativeMethods.HttpApi.HTTP_MULTIPLE_KNOWN_HEADERS header = new UnsafeNclNativeMethods.HttpApi.HTTP_MULTIPLE_KNOWN_HEADERS();
header.HeaderId = UnsafeNclNativeMethods.HttpApi.HTTP_RESPONSE_HEADER_ID.Enum.HttpHeaderWwwAuthenticate;
header.Flags = UnsafeNclNativeMethods.HttpApi.HTTP_RESPONSE_INFO_FLAGS.PreserveOrder; // The docs say this is for www-auth only.
UnsafeNclNativeMethods.HttpApi.HTTP_KNOWN_HEADER[] nativeHeaderValues = new UnsafeNclNativeMethods.HttpApi.HTTP_KNOWN_HEADER[authChallenges.Count];
gcHandle = GCHandle.Alloc(nativeHeaderValues, GCHandleType.Pinned);
pinnedHeaders.Add(gcHandle);
header.KnownHeaders = (UnsafeNclNativeMethods.HttpApi.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 = (sbyte *)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 = (UnsafeNclNativeMethods.HttpApi.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 = HeaderEncoding.GetBytes(statusDescription);
fixed(byte *pReason = byteReason)
{
httpResponse.Response_V1.pReason = (sbyte *)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 = (sbyte *)pContentLength;
(&httpResponse.Response_V1.Headers.KnownHeaders)[(int)HttpSysResponseHeader.ContentLength].RawValueLength = (ushort)byteContentLength.Length;
httpResponse.Response_V1.Headers.UnknownHeaderCount = 0;
statusCode =
UnsafeNclNativeMethods.HttpApi.HttpSendHttpResponse(
_requestQueueHandle,
requestId,
0,
&httpResponse,
null,
&dataWritten,
SafeLocalFree.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
RequestContext.CancelRequest(_requestQueueHandle, requestId);
}
}
finally
{
if (pinnedHeaders != null)
{
foreach (GCHandle handle in pinnedHeaders)
{
if (handle.IsAllocated)
{
handle.Free();
}
}
}
}
}
/*
* 12.3
* HttpSendHttpResponse() and HttpSendResponseEntityBody() Flag Values.
* The following flags can be used on calls to HttpSendHttpResponse() and HttpSendResponseEntityBody() API calls:
*
#define HTTP_SEND_RESPONSE_FLAG_DISCONNECT 0x00000001
#define HTTP_SEND_RESPONSE_FLAG_MORE_DATA 0x00000002
#define HTTP_SEND_RESPONSE_FLAG_RAW_HEADER 0x00000004
#define HTTP_SEND_RESPONSE_FLAG_VALID 0x00000007
*
* HTTP_SEND_RESPONSE_FLAG_DISCONNECT:
* specifies that the network connection should be disconnected immediately after
* sending the response, overriding the HTTP protocol's persistent connection features.
* HTTP_SEND_RESPONSE_FLAG_MORE_DATA:
* specifies that additional entity body data will be sent by the caller. Thus,
* the last call HttpSendResponseEntityBody for a RequestId, will have this flag reset.
* HTTP_SEND_RESPONSE_RAW_HEADER:
* specifies that a caller of HttpSendResponseEntityBody() is intentionally omitting
* a call to HttpSendHttpResponse() in order to bypass normal header processing. The
* actual HTTP header will be generated by the application and sent as entity body.
* This flag should be passed on the first call to HttpSendResponseEntityBody, and
* not after. Thus, flag is not applicable to HttpSendHttpResponse.
*/
// TODO: Consider using HTTP_SEND_RESPONSE_RAW_HEADER with HttpSendResponseEntityBody instead of calling HttpSendHttpResponse.
// This will give us more control of the bytes that hit the wire, including encodings, HTTP 1.0, etc..
// It may also be faster to do this work in managed code and then pass down only one buffer.
// What would we loose by bypassing HttpSendHttpResponse?
//
// TODO: Consider using the HTTP_SEND_RESPONSE_FLAG_BUFFER_DATA flag for most/all responses rather than just Opaque.
internal unsafe uint SendHeaders(HttpApi.HTTP_DATA_CHUNK[] dataChunks,
ResponseStreamAsyncResult asyncResult,
HttpApi.HTTP_FLAGS flags,
bool isOpaqueUpgrade)
{
Debug.Assert(!HasStartedSending, "HttpListenerResponse::SendHeaders()|SentHeaders is true.");
_responseState = ResponseState.StartedSending;
var reasonPhrase = GetReasonPhrase(StatusCode);
/*
* if (m_BoundaryType==BoundaryType.Raw) {
* use HTTP_SEND_RESPONSE_FLAG_RAW_HEADER;
* }
*/
uint statusCode;
uint bytesSent;
List <GCHandle> pinnedHeaders = SerializeHeaders(isOpaqueUpgrade);
try
{
if (dataChunks != null)
{
if (pinnedHeaders == null)
{
pinnedHeaders = new List <GCHandle>();
}
var handle = GCHandle.Alloc(dataChunks, GCHandleType.Pinned);
pinnedHeaders.Add(handle);
_nativeResponse.Response_V1.EntityChunkCount = (ushort)dataChunks.Length;
_nativeResponse.Response_V1.pEntityChunks = (HttpApi.HTTP_DATA_CHUNK *)handle.AddrOfPinnedObject();
}
else if (asyncResult != null && asyncResult.DataChunks != null)
{
_nativeResponse.Response_V1.EntityChunkCount = asyncResult.DataChunkCount;
_nativeResponse.Response_V1.pEntityChunks = asyncResult.DataChunks;
}
else
{
_nativeResponse.Response_V1.EntityChunkCount = 0;
_nativeResponse.Response_V1.pEntityChunks = null;
}
var cachePolicy = new HttpApi.HTTP_CACHE_POLICY();
var cacheTtl = CacheTtl;
if (cacheTtl.HasValue && cacheTtl.Value > TimeSpan.Zero)
{
cachePolicy.Policy = HttpApi.HTTP_CACHE_POLICY_TYPE.HttpCachePolicyTimeToLive;
cachePolicy.SecondsToLive = (uint)Math.Min(cacheTtl.Value.Ticks / TimeSpan.TicksPerSecond, Int32.MaxValue);
}
byte[] reasonPhraseBytes = HeaderEncoding.GetBytes(reasonPhrase);
fixed(byte *pReasonPhrase = reasonPhraseBytes)
{
_nativeResponse.Response_V1.ReasonLength = (ushort)reasonPhraseBytes.Length;
_nativeResponse.Response_V1.pReason = (sbyte *)pReasonPhrase;
fixed(HttpApi.HTTP_RESPONSE_V2 *pResponse = &_nativeResponse)
{
statusCode =
HttpApi.HttpSendHttpResponse(
RequestContext.RequestQueueHandle,
Request.RequestId,
(uint)flags,
pResponse,
&cachePolicy,
&bytesSent,
SafeLocalFree.Zero,
0,
asyncResult == null ? SafeNativeOverlapped.Zero : asyncResult.NativeOverlapped,
IntPtr.Zero);
if (asyncResult != null &&
statusCode == ErrorCodes.ERROR_SUCCESS &&
WebListener.SkipIOCPCallbackOnSuccess)
{
asyncResult.BytesSent = bytesSent;
// The caller will invoke IOCompleted
}
}
}
}
finally
{
FreePinnedHeaders(pinnedHeaders);
}
return(statusCode);
}
