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.Close(ResetStatusCode.InternalError);
return;
}
stream.ReceivedDataAmount += dataFrame.Data.Count;
if (dataFrame.IsEndStream)
{
if (stream.HalfClosedRemote)
{
//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);
}
}
private void HandleRstFrame(RstStreamFrame resetFrame, out Http2Stream stream)
{
Http2Logger.LogDebug("RST_STREAM frame: stream id={0}, status code={1}",
resetFrame.StreamId, resetFrame.StatusCode);
/* 12 -> 6.4
* 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 of type PROTOCOL_ERROR. */
if (resetFrame.StreamId == 0)
{
throw new ProtocolError(ResetStatusCode.ProtocolError, "Rst frame with stream id=0");
}
stream = GetStream(resetFrame.StreamId);
if (stream.Closed)
{
/* 12 -> 5.4.2
* An endpoint MUST NOT send a RST_STREAM in response to an RST_STREAM
* frame, to avoid looping. */
if (!stream.WasRstSent)
{
throw new Http2StreamNotFoundException(resetFrame.StreamId);
}
return;
}
if (!(stream.ReservedRemote || stream.Opened || stream.HalfClosedLocal))
{
throw new ProtocolError(ResetStatusCode.ProtocolError, "Rst for non opened or reserved stream");
}
stream.Close(ResetStatusCode.None);
}
private void ValidateHeaders(Http2Stream stream)
{
/* 12 -> 8.1.3
* 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. */
foreach (var header in stream.Headers)
{
string key = header.Key;
if (!_matcher.IsMatch(key) || key == ":")
{
stream.WriteRst(ResetStatusCode.RefusedStream);
stream.Close(ResetStatusCode.RefusedStream);
break;
}
}
}
private void ValidateHeaders(Http2Stream stream)
{
/* 12 -> 8.1.3
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. */
foreach (var header in stream.Headers)
{
string key = header.Key;
if (!_matcher.IsMatch(key) || key == ":")
{
stream.WriteRst(ResetStatusCode.RefusedStream);
stream.Close(ResetStatusCode.RefusedStream);
break;
}
}
}
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)
{
throw new ProtocolError(ResetStatusCode.ProtocolError,
"no status header in response. StreamId = " + stream.Id);
}
int code;
if (!int.TryParse(stream.Headers.GetValue(CommonHeaders.Status), out code))
{
stream.WriteRst(ResetStatusCode.ProtocolError); //Got something strange in the status field
stream.Close(ResetStatusCode.ProtocolError);
}
//got some king of error
if (code != StatusCode.Code200Ok)
{
//Close server's stream
stream.Close(ResetStatusCode.Cancel); //will dispose client's stream and close server's one.
}
//Do nothing. Client may not process requests for now
}
private void HandleRstFrame(RstStreamFrame resetFrame, out Http2Stream stream)
{
Http2Logger.LogDebug("RST_STREAM frame: stream id={0}, status code={1}",
resetFrame.StreamId, resetFrame.StatusCode);
/* 12 -> 6.4
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 of type PROTOCOL_ERROR. */
if (resetFrame.StreamId == 0)
throw new ProtocolError(ResetStatusCode.ProtocolError, "Rst frame with stream id=0");
stream = GetStream(resetFrame.StreamId);
if (stream.Closed)
{
/* 12 -> 5.4.2
An endpoint MUST NOT send a RST_STREAM in response to an RST_STREAM
frame, to avoid looping. */
if (!stream.WasRstSent)
{
throw new Http2StreamNotFoundException(resetFrame.StreamId);
}
return;
}
if (!(stream.ReservedRemote || stream.Opened || stream.HalfClosedLocal))
throw new ProtocolError(ResetStatusCode.ProtocolError, "Rst for non opened or reserved stream");
stream.Close(ResetStatusCode.None);
}
/// <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)
{
/* 12 -> 8.1.3.1
All HTTP/2 requests MUST include exactly one valid value for the
":method", ":scheme", and ":path" 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). */
if (stream.Headers.GetValue(CommonHeaders.Method) == null
|| stream.Headers.GetValue(CommonHeaders.Path) == null
|| stream.Headers.GetValue(CommonHeaders.Scheme) == null)
{
stream.WriteRst(ResetStatusCode.ProtocolError);
stream.Close(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.HalfClosedLocal = 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);
}
});
}
