Exemple #1
0
func (s *Server) processStreamingRPC(t transport.ServerTransport, stream *transport.Stream, srv *service, sd *StreamDesc, trInfo *traceInfo) (err error) {
	if s.opts.cp != nil {
		stream.SetSendCompress(s.opts.cp.Type())
	}
	ss := &serverStream{
		t:      t,
		s:      stream,
		p:      &parser{s: stream},
		codec:  s.opts.codec,
		cp:     s.opts.cp,
		dc:     s.opts.dc,
		trInfo: trInfo,
	}
	if ss.cp != nil {
		ss.cbuf = new(bytes.Buffer)
	}
	if trInfo != nil {
		trInfo.tr.LazyLog(&trInfo.firstLine, false)
		defer func() {
			ss.mu.Lock()
			if err != nil && err != io.EOF {
				ss.trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
				ss.trInfo.tr.SetError()
			}
			ss.trInfo.tr.Finish()
			ss.trInfo.tr = nil
			ss.mu.Unlock()
		}()
	}
	if appErr := sd.Handler(srv.server, ss); appErr != nil {
		if err, ok := appErr.(rpcError); ok {
			ss.statusCode = err.code
			ss.statusDesc = err.desc
		} else if err, ok := appErr.(transport.StreamError); ok {
			ss.statusCode = err.Code
			ss.statusDesc = err.Desc
		} else {
			ss.statusCode = convertCode(appErr)
			ss.statusDesc = appErr.Error()
		}
	}
	if trInfo != nil {
		ss.mu.Lock()
		if ss.statusCode != codes.OK {
			ss.trInfo.tr.LazyLog(stringer(ss.statusDesc), true)
			ss.trInfo.tr.SetError()
		} else {
			ss.trInfo.tr.LazyLog(stringer("OK"), false)
		}
		ss.mu.Unlock()
	}
	return t.WriteStatus(ss.s, ss.statusCode, ss.statusDesc)

}
Exemple #2
0
func (s *Server) serveStreams(st transport.ServerTransport) {
	defer s.removeConn(st)
	defer st.Close()
	var wg sync.WaitGroup
	st.HandleStreams(func(stream *transport.Stream) {
		wg.Add(1)
		go func() {
			defer wg.Done()
			s.handleStream(st, stream, s.traceInfo(st, stream))
		}()
	})
	wg.Wait()
}
Exemple #3
0
// traceInfo returns a traceInfo and associates it with stream, if tracing is enabled.
// If tracing is not enabled, it returns nil.
func (s *Server) traceInfo(st transport.ServerTransport, stream *transport.Stream) (trInfo *traceInfo) {
	if !EnableTracing {
		return nil
	}
	trInfo = &traceInfo{
		tr: trace.New("grpc.Recv."+methodFamily(stream.Method()), stream.Method()),
	}
	trInfo.firstLine.client = false
	trInfo.firstLine.remoteAddr = st.RemoteAddr()
	stream.TraceContext(trInfo.tr)
	if dl, ok := stream.Context().Deadline(); ok {
		trInfo.firstLine.deadline = dl.Sub(time.Now())
	}
	return trInfo
}
Exemple #4
0
func (s *Server) sendResponse(t transport.ServerTransport, stream *transport.Stream, msg interface{}, cp Compressor, opts *transport.Options) error {
	var cbuf *bytes.Buffer
	if cp != nil {
		cbuf = new(bytes.Buffer)
	}
	p, err := encode(s.opts.codec, msg, cp, cbuf)
	if err != nil {
		// This typically indicates a fatal issue (e.g., memory
		// corruption or hardware faults) the application program
		// cannot handle.
		//
		// TODO(zhaoq): There exist other options also such as only closing the
		// faulty stream locally and remotely (Other streams can keep going). Find
		// the optimal option.
		grpclog.Fatalf("grpc: Server failed to encode response %v", err)
	}
	return t.Write(stream, p, opts)
}
Exemple #5
0
func (s *Server) handleStream(t transport.ServerTransport, stream *transport.Stream, trInfo *traceInfo) {
	sm := stream.Method()
	if sm != "" && sm[0] == '/' {
		sm = sm[1:]
	}
	pos := strings.LastIndex(sm, "/")
	if pos == -1 {
		if trInfo != nil {
			trInfo.tr.LazyLog(&fmtStringer{"Malformed method name %q", []interface{}{sm}}, true)
			trInfo.tr.SetError()
		}
		if err := t.WriteStatus(stream, codes.InvalidArgument, fmt.Sprintf("malformed method name: %q", stream.Method())); err != nil {
			if trInfo != nil {
				trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
				trInfo.tr.SetError()
			}
			grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err)
		}
		if trInfo != nil {
			trInfo.tr.Finish()
		}
		return
	}
	service := sm[:pos]
	method := sm[pos+1:]
	srv, ok := s.m[service]
	if !ok {
		if trInfo != nil {
			trInfo.tr.LazyLog(&fmtStringer{"Unknown service %v", []interface{}{service}}, true)
			trInfo.tr.SetError()
		}
		if err := t.WriteStatus(stream, codes.Unimplemented, fmt.Sprintf("unknown service %v", service)); err != nil {
			if trInfo != nil {
				trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
				trInfo.tr.SetError()
			}
			grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err)
		}
		if trInfo != nil {
			trInfo.tr.Finish()
		}
		return
	}
	// Unary RPC or Streaming RPC?
	if md, ok := srv.md[method]; ok {
		s.processUnaryRPC(t, stream, srv, md, trInfo)
		return
	}
	if sd, ok := srv.sd[method]; ok {
		s.processStreamingRPC(t, stream, srv, sd, trInfo)
		return
	}
	if trInfo != nil {
		trInfo.tr.LazyLog(&fmtStringer{"Unknown method %v", []interface{}{method}}, true)
		trInfo.tr.SetError()
	}
	if err := t.WriteStatus(stream, codes.Unimplemented, fmt.Sprintf("unknown method %v", method)); err != nil {
		if trInfo != nil {
			trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
			trInfo.tr.SetError()
		}
		grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err)
	}
	if trInfo != nil {
		trInfo.tr.Finish()
	}
}
Exemple #6
0
func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.Stream, srv *service, md *MethodDesc, trInfo *traceInfo) (err error) {
	if trInfo != nil {
		defer trInfo.tr.Finish()
		trInfo.firstLine.client = false
		trInfo.tr.LazyLog(&trInfo.firstLine, false)
		defer func() {
			if err != nil && err != io.EOF {
				trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
				trInfo.tr.SetError()
			}
		}()
	}
	p := &parser{s: stream}
	for {
		pf, req, err := p.recvMsg()
		if err == io.EOF {
			// The entire stream is done (for unary RPC only).
			return err
		}
		if err != nil {
			switch err := err.(type) {
			case transport.ConnectionError:
				// Nothing to do here.
			case transport.StreamError:
				if err := t.WriteStatus(stream, err.Code, err.Desc); err != nil {
					grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", err)
				}
			default:
				panic(fmt.Sprintf("grpc: Unexpected error (%T) from recvMsg: %v", err, err))
			}
			return err
		}

		if err := checkRecvPayload(pf, stream.RecvCompress(), s.opts.dc); err != nil {
			switch err := err.(type) {
			case transport.StreamError:
				if err := t.WriteStatus(stream, err.Code, err.Desc); err != nil {
					grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", err)
				}
			default:
				if err := t.WriteStatus(stream, codes.Internal, err.Error()); err != nil {
					grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", err)
				}

			}
			return err
		}
		statusCode := codes.OK
		statusDesc := ""
		df := func(v interface{}) error {
			if pf == compressionMade {
				var err error
				req, err = s.opts.dc.Do(bytes.NewReader(req))
				if err != nil {
					if err := t.WriteStatus(stream, codes.Internal, err.Error()); err != nil {
						grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", err)
					}
					return err
				}
			}
			if err := s.opts.codec.Unmarshal(req, v); err != nil {
				return err
			}
			if trInfo != nil {
				trInfo.tr.LazyLog(&payload{sent: false, msg: v}, true)
			}
			return nil
		}
		reply, appErr := md.Handler(srv.server, stream.Context(), df)
		if appErr != nil {
			if err, ok := appErr.(rpcError); ok {
				statusCode = err.code
				statusDesc = err.desc
			} else {
				statusCode = convertCode(appErr)
				statusDesc = appErr.Error()
			}
			if trInfo != nil && statusCode != codes.OK {
				trInfo.tr.LazyLog(stringer(statusDesc), true)
				trInfo.tr.SetError()
			}
			if err := t.WriteStatus(stream, statusCode, statusDesc); err != nil {
				grpclog.Printf("grpc: Server.processUnaryRPC failed to write status: %v", err)
				return err
			}
			return nil
		}
		if trInfo != nil {
			trInfo.tr.LazyLog(stringer("OK"), false)
		}
		opts := &transport.Options{
			Last:  true,
			Delay: false,
		}
		if s.opts.cp != nil {
			stream.SetSendCompress(s.opts.cp.Type())
		}
		if err := s.sendResponse(t, stream, reply, s.opts.cp, opts); err != nil {
			switch err := err.(type) {
			case transport.ConnectionError:
				// Nothing to do here.
			case transport.StreamError:
				statusCode = err.Code
				statusDesc = err.Desc
			default:
				statusCode = codes.Unknown
				statusDesc = err.Error()
			}
			return err
		}
		if trInfo != nil {
			trInfo.tr.LazyLog(&payload{sent: true, msg: reply}, true)
		}
		return t.WriteStatus(stream, statusCode, statusDesc)
	}
}