private void HandleRstFrame(RstStreamFrame resetFrame, out Http2Stream stream)
{
stream = GetStream(resetFrame.StreamId);
//Spec 06 tells that impl MUST not answer with rst on rst to avoid loop.
if (stream != null)
{
Http2Logger.LogDebug("RST frame with code {0} for id {1}", resetFrame.StatusCode,
resetFrame.StreamId);
stream.Dispose(ResetStatusCode.None);
}
//Do not signal an error because (06)
//WINDOW_UPDATE [WINDOW_UPDATE], PRIORITY [PRIORITY], or RST_STREAM
//[RST_STREAM] frames can be received in this state for a short
//period after a frame containing an END_STREAM flag is sent.
}
private void SaveDataFrame(Http2Stream stream, DataFrame dataFrame)
{
string originalPath = stream.Headers.GetValue(CommonHeaders.Path.ToLower());
//If user sets the empty file in get command we return notFound webpage
string fileName = string.IsNullOrEmpty(Path.GetFileName(originalPath)) ? Index : Path.GetFileName(originalPath);
string path = Path.Combine(AssemblyPath, fileName);
try
{
_fileHelper.SaveToFile(dataFrame.Data.Array, dataFrame.Data.Offset, dataFrame.Data.Count,
path, stream.ReceivedDataAmount != 0);
}
catch (IOException)
{
Http2Logger.LogError("File is still downloading. Repeat request later");
//stream.WriteDataFrame(new byte[0], true);
//RST always has endstream flag
//_fileHelper.RemoveStream(path);
stream.Dispose(ResetStatusCode.InternalError);
return;
}
stream.ReceivedDataAmount += dataFrame.FrameLength;
if (dataFrame.IsEndStream)
{
if (!stream.EndStreamSent)
{
//send terminator
stream.WriteDataFrame(new byte[0], true);
Http2Logger.LogConsole("Terminator was sent");
}
_fileHelper.RemoveStream(path);
Http2Logger.LogConsole("Bytes received " + stream.ReceivedDataAmount);
#if DEBUG
const string wayToServerRoot1 = @"..\..\..\..\Drop\Root";
const string wayToServerRoot2 = @".\Root";
var areFilesEqual = _fileHelper.CompareFiles(path, wayToServerRoot1 + originalPath) ||
_fileHelper.CompareFiles(path, wayToServerRoot2 + originalPath);
if (!areFilesEqual)
{
Console.ForegroundColor = ConsoleColor.Red;
Http2Logger.LogError("Files are NOT EQUAL!");
}
else
{
Console.ForegroundColor = ConsoleColor.Green;
Http2Logger.LogConsole("Files are EQUAL!");
}
Console.ForegroundColor = ConsoleColor.Gray;
#endif
}
}
private void SaveDataFrame(Http2Stream stream, DataFrame dataFrame)
{
string originalPath = stream.Headers.GetValue(CommonHeaders.Path.ToLower());
//If user sets the empty file in get command we return notFound webpage
string fileName = string.IsNullOrEmpty(Path.GetFileName(originalPath)) ? Index : Path.GetFileName(originalPath);
string path = Path.Combine(AssemblyPath, fileName);
try
{
_fileHelper.SaveToFile(dataFrame.Data.Array, dataFrame.Data.Offset, dataFrame.Data.Count,
path, stream.ReceivedDataAmount != 0);
}
catch (IOException)
{
Http2Logger.LogError("File is still downloading. Repeat request later");
stream.Dispose(ResetStatusCode.InternalError);
return;
}
stream.ReceivedDataAmount += dataFrame.FrameLength;
if (dataFrame.IsEndStream)
{
if (!stream.EndStreamSent)
{
//send terminator
stream.WriteDataFrame(new ArraySegment<byte>(new byte[0]), true);
Http2Logger.LogConsole("Terminator was sent");
}
_fileHelper.RemoveStream(path);
Http2Logger.LogConsole("Bytes received " + stream.ReceivedDataAmount);
}
}
protected override void ProcessRequest(Http2Stream stream, Frame frame)
{
//spec 09 -> 8.1.3.2. Response Header Fields
//A single ":status" header field is defined that carries the HTTP
//status code field (see [HTTP-p2], Section 6). This header field MUST
//be included in all responses, otherwise the response is malformed
if (stream.Headers.GetValue(CommonHeaders.Status) == null)
{
stream.WriteRst(ResetStatusCode.ProtocolError);
stream.Dispose(ResetStatusCode.ProtocolError);
return;
}
int code;
if (!int.TryParse(stream.Headers.GetValue(CommonHeaders.Status), out code))
{
stream.WriteRst(ResetStatusCode.ProtocolError); //Got something strange in the status field
stream.Dispose(ResetStatusCode.ProtocolError);
}
//got some king of error
if (code != StatusCode.Code200Ok)
{
//Close server's stream
stream.Dispose(ResetStatusCode.Cancel); //will dispose client's stream and close server's one.
}
//Do nothing. Client may not process requests for now
}
/// <summary>
/// Overrides request processing logic.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="frame">The request header frame.</param>
/// <returns></returns>
protected override void ProcessRequest(Http2Stream stream, Frame frame)
{
//spec 09
//8.1.3.1. Request Header Fields
//HTTP/2.0 defines a number of header fields starting with a colon ':'
//character that carry information about the request target:
//o The ":method" header field includes the HTTP method ([HTTP-p2],
//Section 4).
//o The ":scheme" header field includes the scheme portion of the
//target URI ([RFC3986], Section 3.1).
//o The ":authority" header field includes the authority portion of
//the target URI ([RFC3986], Section 3.2).
//To ensure that the HTTP/1.1 request line can be reproduced
//accurately, this header field MUST be omitted when translating
//from an HTTP/1.1 request that has a request target in origin or
//asterisk form (see [HTTP-p1], Section 5.3). Clients that generate
//HTTP/2.0 requests directly SHOULD instead omit the "Host" header
//field. An intermediary that converts a request to HTTP/1.1 MUST
//create a "Host" header field if one is not present in a request by
//copying the value of the ":authority" header field.
//o The ":path" header field includes the path and query parts of the
//target URI (the "path-absolute" production from [RFC3986] and
//optionally a '?' character followed by the "query" production, see
//[RFC3986], Section 3.3 and [RFC3986], Section 3.4). This field
//MUST NOT be empty; URIs that do not contain a path component MUST
//include a value of '/', unless the request is an OPTIONS in
//asterisk form, in which case the ":path" header field MUST include
//'*'.
//All HTTP/2.0 requests MUST include exactly one valid value for all of
//these header fields, unless this is a CONNECT request (Section 8.3).
//An HTTP request that omits mandatory header fields is malformed
//(Section 8.1.3.5).
//Header field names that contain a colon are only valid in the
//HTTP/2.0 context. These are not HTTP header fields. Implementations
//MUST NOT generate header fields that start with a colon, but they
//MUST ignore any header field that starts with a colon. In
//particular, header fields with names starting with a colon MUST NOT
//be exposed as HTTP header fields.
if (stream.Headers.GetValue(CommonHeaders.Method) == null
|| stream.Headers.GetValue(CommonHeaders.Path) == null
|| stream.Headers.GetValue(CommonHeaders.Scheme) == null
|| stream.Headers.GetValue(CommonHeaders.Authority) == null)
{
stream.WriteRst(ResetStatusCode.ProtocolError);
stream.Dispose(ResetStatusCode.ProtocolError);
return;
}
Task.Factory.StartNew(async () =>
{
try
{
var context = new Http2OwinMessageContext(stream);
var contextEnv = context.OwinContext.Environment;
PushFunc pushDelegate = null;
pushDelegate = async pairs =>
{
var promisedStream = CreateStream();
//assume that we have already received endStream
promisedStream.EndStreamReceived = true;
stream.WritePushPromise(pairs, promisedStream.Id);
var headers = new HeadersList(pairs);
promisedStream.Headers.AddRange(headers);
var http2MsgCtx = new Http2OwinMessageContext(promisedStream);
var http2PushCtx = http2MsgCtx.OwinContext;
http2PushCtx.Set(CommonOwinKeys.ServerPushFunc, pushDelegate);
//pass add info from parent to child context. This info can store
//reference table for example or something els that should be passed from
//client request into child push requests.
if (contextEnv.ContainsKey(CommonOwinKeys.AdditionalInfo))
http2PushCtx.Set(CommonOwinKeys.AdditionalInfo, contextEnv[CommonOwinKeys.AdditionalInfo]);
await _next(http2PushCtx);
http2MsgCtx.FinishResponse();
};
context.OwinContext.Set(CommonOwinKeys.ServerPushFunc, pushDelegate);
context.OwinContext.Set(CommonOwinKeys.EnableServerPush, _isPushEnabled);
await _next(context.OwinContext);
context.FinishResponse();
}
catch (Exception ex)
{
EndResponse(stream, ex);
}
});
}
private void ValidateHeaders(Http2Stream stream)
{
//spec 09 -> 8.1.3. HTTP Header Fields
//Header field names MUST be
//converted to lowercase prior to their encoding in HTTP/2.0. A
//request or response containing uppercase header field names MUST be
//treated as malformed (Section 8.1.3.5).
foreach (var header in stream.Headers)
{
if (!_matcher.IsMatch(header.Key))
{
stream.WriteRst(ResetStatusCode.RefusedStream);
stream.Dispose(ResetStatusCode.RefusedStream);
break;
}
}
}
private void HandleRstFrame(RstStreamFrame resetFrame, out Http2Stream stream)
{
//spec 09
//6.4. RST_STREAM
//RST_STREAM frames MUST be associated with a stream. If a RST_STREAM
//frame is received with a stream identifier of 0x0, the recipient MUST
//treat this as a connection error (Section 5.4.1) of type
//PROTOCOL_ERROR.
if (resetFrame.StreamId == 0)
{
throw new ProtocolError(ResetStatusCode.ProtocolError, "resetFrame with id = 0");
}
stream = GetStream(resetFrame.StreamId);
//09 -> 5.4.2. Stream Error Handling
//An endpoint MUST NOT send a RST_STREAM in response to an RST_STREAM
//frame, to avoid looping.
if (stream == null)
return;
Http2Logger.LogDebug("RST frame with code {0} for id {1}", resetFrame.StatusCode,
resetFrame.StreamId);
stream.Dispose(ResetStatusCode.None);
//09 -> 5.1. Stream States
//WINDOW_UPDATE, PRIORITY, or RST_STREAM frames can be received in
//this state for a short period after a DATA or HEADERS frame
//containing an END_STREAM flag is sent. Until the remote peer
//receives and processes the frame bearing the END_STREAM flag, it
//might send frame of any of these types. Endpoints MUST ignore
//WINDOW_UPDATE, PRIORITY, or RST_STREAM frames received in this
//state, though endpoints MAY choose to treat frames that arrive a
//significant time after sending END_STREAM as a connection error
//(Section 5.4.1) of type PROTOCOL_ERROR.
}
