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refactor mux

pull/1343/head
Darien Raymond 2018-10-23 14:35:32 +02:00
parent 838f2919ab
commit 04bbdfc426
No known key found for this signature in database
GPG Key ID: 7251FFA14BB18169
3 changed files with 506 additions and 491 deletions
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290
common/mux/client.go Normal file
View File

@ -0,0 +1,290 @@
package mux
import (
"context"
"io"
"sync"
"time"
"v2ray.com/core/common"
"v2ray.com/core/common/buf"
"v2ray.com/core/common/errors"
"v2ray.com/core/common/net"
"v2ray.com/core/common/protocol"
"v2ray.com/core/common/session"
"v2ray.com/core/common/signal/done"
"v2ray.com/core/common/vio"
"v2ray.com/core/proxy"
"v2ray.com/core/transport/internet"
"v2ray.com/core/transport/pipe"
)
type ClientManager struct {
access sync.Mutex
clients []*Client
proxy proxy.Outbound
dialer internet.Dialer
concurrency uint32
}
func NewClientManager(p proxy.Outbound, d internet.Dialer, c uint32) *ClientManager {
return &ClientManager{
proxy: p,
dialer: d,
concurrency: c,
}
}
func (m *ClientManager) Dispatch(ctx context.Context, link *vio.Link) error {
m.access.Lock()
defer m.access.Unlock()
for _, client := range m.clients {
if client.Dispatch(ctx, link) {
return nil
}
}
client, err := NewClient(ctx, m.proxy, m.dialer, m)
if err != nil {
return newError("failed to create client").Base(err)
}
m.clients = append(m.clients, client)
client.Dispatch(ctx, link)
return nil
}
func (m *ClientManager) onClientFinish() {
m.access.Lock()
defer m.access.Unlock()
activeClients := make([]*Client, 0, len(m.clients))
for _, client := range m.clients {
if !client.Closed() {
activeClients = append(activeClients, client)
}
}
m.clients = activeClients
}
type Client struct {
sessionManager *SessionManager
link vio.Link
done *done.Instance
manager *ClientManager
concurrency uint32
}
var muxCoolAddress = net.DomainAddress("v1.mux.cool")
var muxCoolPort = net.Port(9527)
// NewClient creates a new mux.Client.
func NewClient(pctx context.Context, p proxy.Outbound, dialer internet.Dialer, m *ClientManager) (*Client, error) {
ctx := session.ContextWithOutbound(context.Background(), &session.Outbound{
Target: net.TCPDestination(muxCoolAddress, muxCoolPort),
})
ctx, cancel := context.WithCancel(ctx)
opts := pipe.OptionsFromContext(pctx)
uplinkReader, upLinkWriter := pipe.New(opts...)
downlinkReader, downlinkWriter := pipe.New(opts...)
c := &Client{
sessionManager: NewSessionManager(),
link: vio.Link{
Reader: downlinkReader,
Writer: upLinkWriter,
},
done: done.New(),
manager: m,
concurrency: m.concurrency,
}
go func() {
if err := p.Process(ctx, &vio.Link{Reader: uplinkReader, Writer: downlinkWriter}, dialer); err != nil {
errors.New("failed to handler mux client connection").Base(err).WriteToLog()
}
common.Must(c.done.Close())
cancel()
}()
go c.fetchOutput()
go c.monitor()
return c, nil
}
// Closed returns true if this Client is closed.
func (m *Client) Closed() bool {
return m.done.Done()
}
func (m *Client) monitor() {
defer m.manager.onClientFinish()
timer := time.NewTicker(time.Second * 16)
defer timer.Stop()
for {
select {
case <-m.done.Wait():
m.sessionManager.Close()
common.Close(m.link.Writer) // nolint: errcheck
pipe.CloseError(m.link.Reader) // nolint: errcheck
return
case <-timer.C:
size := m.sessionManager.Size()
if size == 0 && m.sessionManager.CloseIfNoSession() {
common.Must(m.done.Close())
}
}
}
}
func writeFirstPayload(reader buf.Reader, writer *Writer) error {
err := buf.CopyOnceTimeout(reader, writer, time.Millisecond*100)
if err == buf.ErrNotTimeoutReader || err == buf.ErrReadTimeout {
return writer.WriteMultiBuffer(buf.MultiBuffer{})
}
if err != nil {
return err
}
return nil
}
func fetchInput(ctx context.Context, s *Session, output buf.Writer) {
dest := session.OutboundFromContext(ctx).Target
transferType := protocol.TransferTypeStream
if dest.Network == net.Network_UDP {
transferType = protocol.TransferTypePacket
}
s.transferType = transferType
writer := NewWriter(s.ID, dest, output, transferType)
defer s.Close() // nolint: errcheck
defer writer.Close() // nolint: errcheck
newError("dispatching request to ", dest).WriteToLog(session.ExportIDToError(ctx))
if err := writeFirstPayload(s.input, writer); err != nil {
newError("failed to write first payload").Base(err).WriteToLog(session.ExportIDToError(ctx))
writer.hasError = true
pipe.CloseError(s.input)
return
}
if err := buf.Copy(s.input, writer); err != nil {
newError("failed to fetch all input").Base(err).WriteToLog(session.ExportIDToError(ctx))
writer.hasError = true
pipe.CloseError(s.input)
return
}
}
func (m *Client) Dispatch(ctx context.Context, link *vio.Link) bool {
sm := m.sessionManager
if sm.Size() >= int(m.concurrency) || sm.Count() >= maxTotal {
return false
}
if m.done.Done() {
return false
}
s := sm.Allocate()
if s == nil {
return false
}
s.input = link.Reader
s.output = link.Writer
go fetchInput(ctx, s, m.link.Writer)
return true
}
func drain(reader buf.Reader) error {
return buf.Copy(reader, buf.Discard)
}
func (m *Client) handleStatueKeepAlive(meta *FrameMetadata, reader *buf.BufferedReader) error {
if meta.Option.Has(OptionData) {
return drain(NewStreamReader(reader))
}
return nil
}
func (m *Client) handleStatusNew(meta *FrameMetadata, reader *buf.BufferedReader) error {
if meta.Option.Has(OptionData) {
return drain(NewStreamReader(reader))
}
return nil
}
func (m *Client) handleStatusKeep(meta *FrameMetadata, reader *buf.BufferedReader) error {
if !meta.Option.Has(OptionData) {
return nil
}
if s, found := m.sessionManager.Get(meta.SessionID); found {
rr := s.NewReader(reader)
if err := buf.Copy(rr, s.output); err != nil {
drain(rr)
pipe.CloseError(s.input)
return s.Close()
}
return nil
}
return drain(NewStreamReader(reader))
}
func (m *Client) handleStatusEnd(meta *FrameMetadata, reader *buf.BufferedReader) error {
if s, found := m.sessionManager.Get(meta.SessionID); found {
if meta.Option.Has(OptionError) {
pipe.CloseError(s.input)
pipe.CloseError(s.output)
}
s.Close()
}
if meta.Option.Has(OptionData) {
return drain(NewStreamReader(reader))
}
return nil
}
func (m *Client) fetchOutput() {
defer func() {
common.Must(m.done.Close())
}()
reader := &buf.BufferedReader{Reader: m.link.Reader}
var meta FrameMetadata
for {
err := meta.Unmarshal(reader)
if err != nil {
if errors.Cause(err) != io.EOF {
newError("failed to read metadata").Base(err).WriteToLog()
}
break
}
switch meta.SessionStatus {
case SessionStatusKeepAlive:
err = m.handleStatueKeepAlive(&meta, reader)
case SessionStatusEnd:
err = m.handleStatusEnd(&meta, reader)
case SessionStatusNew:
err = m.handleStatusNew(&meta, reader)
case SessionStatusKeep:
err = m.handleStatusKeep(&meta, reader)
default:
status := meta.SessionStatus
newError("unknown status: ", status).AtError().WriteToLog()
return
}
if err != nil {
newError("failed to process data").Base(err).WriteToLog()
return
}
}
}

491
common/mux/mux.go
View File

@ -2,497 +2,6 @@ package mux
//go:generate errorgen //go:generate errorgen
import (
"context"
"io"
"sync"
"time"
"v2ray.com/core"
"v2ray.com/core/common"
"v2ray.com/core/common/buf"
"v2ray.com/core/common/errors"
"v2ray.com/core/common/log"
"v2ray.com/core/common/net"
"v2ray.com/core/common/protocol"
"v2ray.com/core/common/session"
"v2ray.com/core/common/signal/done"
"v2ray.com/core/common/vio"
"v2ray.com/core/features/routing"
"v2ray.com/core/proxy"
"v2ray.com/core/transport/internet"
"v2ray.com/core/transport/pipe"
)
const ( const (
maxTotal = 128 maxTotal = 128
) )
type ClientManager struct {
access sync.Mutex
clients []*Client
proxy proxy.Outbound
dialer internet.Dialer
concurrency uint32
}
func NewClientManager(p proxy.Outbound, d internet.Dialer, c uint32) *ClientManager {
return &ClientManager{
proxy: p,
dialer: d,
concurrency: c,
}
}
func (m *ClientManager) Dispatch(ctx context.Context, link *vio.Link) error {
m.access.Lock()
defer m.access.Unlock()
for _, client := range m.clients {
if client.Dispatch(ctx, link) {
return nil
}
}
client, err := NewClient(ctx, m.proxy, m.dialer, m)
if err != nil {
return newError("failed to create client").Base(err)
}
m.clients = append(m.clients, client)
client.Dispatch(ctx, link)
return nil
}
func (m *ClientManager) onClientFinish() {
m.access.Lock()
defer m.access.Unlock()
activeClients := make([]*Client, 0, len(m.clients))
for _, client := range m.clients {
if !client.Closed() {
activeClients = append(activeClients, client)
}
}
m.clients = activeClients
}
type Client struct {
sessionManager *SessionManager
link vio.Link
done *done.Instance
manager *ClientManager
concurrency uint32
}
var muxCoolAddress = net.DomainAddress("v1.mux.cool")
var muxCoolPort = net.Port(9527)
// NewClient creates a new mux.Client.
func NewClient(pctx context.Context, p proxy.Outbound, dialer internet.Dialer, m *ClientManager) (*Client, error) {
ctx := session.ContextWithOutbound(context.Background(), &session.Outbound{
Target: net.TCPDestination(muxCoolAddress, muxCoolPort),
})
ctx, cancel := context.WithCancel(ctx)
opts := pipe.OptionsFromContext(pctx)
uplinkReader, upLinkWriter := pipe.New(opts...)
downlinkReader, downlinkWriter := pipe.New(opts...)
c := &Client{
sessionManager: NewSessionManager(),
link: vio.Link{
Reader: downlinkReader,
Writer: upLinkWriter,
},
done: done.New(),
manager: m,
concurrency: m.concurrency,
}
go func() {
if err := p.Process(ctx, &vio.Link{Reader: uplinkReader, Writer: downlinkWriter}, dialer); err != nil {
errors.New("failed to handler mux client connection").Base(err).WriteToLog()
}
common.Must(c.done.Close())
cancel()
}()
go c.fetchOutput()
go c.monitor()
return c, nil
}
// Closed returns true if this Client is closed.
func (m *Client) Closed() bool {
return m.done.Done()
}
func (m *Client) monitor() {
defer m.manager.onClientFinish()
timer := time.NewTicker(time.Second * 16)
defer timer.Stop()
for {
select {
case <-m.done.Wait():
m.sessionManager.Close()
common.Close(m.link.Writer) // nolint: errcheck
pipe.CloseError(m.link.Reader) // nolint: errcheck
return
case <-timer.C:
size := m.sessionManager.Size()
if size == 0 && m.sessionManager.CloseIfNoSession() {
common.Must(m.done.Close())
}
}
}
}
func writeFirstPayload(reader buf.Reader, writer *Writer) error {
err := buf.CopyOnceTimeout(reader, writer, time.Millisecond*100)
if err == buf.ErrNotTimeoutReader || err == buf.ErrReadTimeout {
return writer.WriteMultiBuffer(buf.MultiBuffer{})
}
if err != nil {
return err
}
return nil
}
func fetchInput(ctx context.Context, s *Session, output buf.Writer) {
dest := session.OutboundFromContext(ctx).Target
transferType := protocol.TransferTypeStream
if dest.Network == net.Network_UDP {
transferType = protocol.TransferTypePacket
}
s.transferType = transferType
writer := NewWriter(s.ID, dest, output, transferType)
defer s.Close() // nolint: errcheck
defer writer.Close() // nolint: errcheck
newError("dispatching request to ", dest).WriteToLog(session.ExportIDToError(ctx))
if err := writeFirstPayload(s.input, writer); err != nil {
newError("failed to write first payload").Base(err).WriteToLog(session.ExportIDToError(ctx))
writer.hasError = true
pipe.CloseError(s.input)
return
}
if err := buf.Copy(s.input, writer); err != nil {
newError("failed to fetch all input").Base(err).WriteToLog(session.ExportIDToError(ctx))
writer.hasError = true
pipe.CloseError(s.input)
return
}
}
func (m *Client) Dispatch(ctx context.Context, link *vio.Link) bool {
sm := m.sessionManager
if sm.Size() >= int(m.concurrency) || sm.Count() >= maxTotal {
return false
}
if m.done.Done() {
return false
}
s := sm.Allocate()
if s == nil {
return false
}
s.input = link.Reader
s.output = link.Writer
go fetchInput(ctx, s, m.link.Writer)
return true
}
func drain(reader buf.Reader) error {
return buf.Copy(reader, buf.Discard)
}
func (m *Client) handleStatueKeepAlive(meta *FrameMetadata, reader *buf.BufferedReader) error {
if meta.Option.Has(OptionData) {
return drain(NewStreamReader(reader))
}
return nil
}
func (m *Client) handleStatusNew(meta *FrameMetadata, reader *buf.BufferedReader) error {
if meta.Option.Has(OptionData) {
return drain(NewStreamReader(reader))
}
return nil
}
func (m *Client) handleStatusKeep(meta *FrameMetadata, reader *buf.BufferedReader) error {
if !meta.Option.Has(OptionData) {
return nil
}
if s, found := m.sessionManager.Get(meta.SessionID); found {
rr := s.NewReader(reader)
if err := buf.Copy(rr, s.output); err != nil {
drain(rr)
pipe.CloseError(s.input)
return s.Close()
}
return nil
}
return drain(NewStreamReader(reader))
}
func (m *Client) handleStatusEnd(meta *FrameMetadata, reader *buf.BufferedReader) error {
if s, found := m.sessionManager.Get(meta.SessionID); found {
if meta.Option.Has(OptionError) {
pipe.CloseError(s.input)
pipe.CloseError(s.output)
}
s.Close()
}
if meta.Option.Has(OptionData) {
return drain(NewStreamReader(reader))
}
return nil
}
func (m *Client) fetchOutput() {
defer func() {
common.Must(m.done.Close())
}()
reader := &buf.BufferedReader{Reader: m.link.Reader}
var meta FrameMetadata
for {
err := meta.Unmarshal(reader)
if err != nil {
if errors.Cause(err) != io.EOF {
newError("failed to read metadata").Base(err).WriteToLog()
}
break
}
switch meta.SessionStatus {
case SessionStatusKeepAlive:
err = m.handleStatueKeepAlive(&meta, reader)
case SessionStatusEnd:
err = m.handleStatusEnd(&meta, reader)
case SessionStatusNew:
err = m.handleStatusNew(&meta, reader)
case SessionStatusKeep:
err = m.handleStatusKeep(&meta, reader)
default:
status := meta.SessionStatus
newError("unknown status: ", status).AtError().WriteToLog()
return
}
if err != nil {
newError("failed to process data").Base(err).WriteToLog()
return
}
}
}
type Server struct {
dispatcher routing.Dispatcher
}
// NewServer creates a new mux.Server.
func NewServer(ctx context.Context) *Server {
s := &Server{}
core.RequireFeatures(ctx, func(d routing.Dispatcher) {
s.dispatcher = d
})
return s
}
// Type implements common.HasType.
func (s *Server) Type() interface{} {
return s.dispatcher.Type()
}
// Dispatch impliments routing.Dispatcher
func (s *Server) Dispatch(ctx context.Context, dest net.Destination) (*vio.Link, error) {
if dest.Address != muxCoolAddress {
return s.dispatcher.Dispatch(ctx, dest)
}
opts := pipe.OptionsFromContext(ctx)
uplinkReader, uplinkWriter := pipe.New(opts...)
downlinkReader, downlinkWriter := pipe.New(opts...)
worker := &ServerWorker{
dispatcher: s.dispatcher,
link: &vio.Link{
Reader: uplinkReader,
Writer: downlinkWriter,
},
sessionManager: NewSessionManager(),
}
go worker.run(ctx)
return &vio.Link{Reader: downlinkReader, Writer: uplinkWriter}, nil
}
// Start implements common.Runnable.
func (s *Server) Start() error {
return nil
}
// Close implements common.Closable.
func (s *Server) Close() error {
return nil
}
type ServerWorker struct {
dispatcher routing.Dispatcher
link *vio.Link
sessionManager *SessionManager
}
func handle(ctx context.Context, s *Session, output buf.Writer) {
writer := NewResponseWriter(s.ID, output, s.transferType)
if err := buf.Copy(s.input, writer); err != nil {
newError("session ", s.ID, " ends.").Base(err).WriteToLog(session.ExportIDToError(ctx))
writer.hasError = true
}
writer.Close()
s.Close()
}
func (w *ServerWorker) handleStatusKeepAlive(meta *FrameMetadata, reader *buf.BufferedReader) error {
if meta.Option.Has(OptionData) {
return drain(NewStreamReader(reader))
}
return nil
}
func (w *ServerWorker) handleStatusNew(ctx context.Context, meta *FrameMetadata, reader *buf.BufferedReader) error {
newError("received request for ", meta.Target).WriteToLog(session.ExportIDToError(ctx))
{
msg := &log.AccessMessage{
To: meta.Target,
Status: log.AccessAccepted,
Reason: "",
}
if inbound := session.InboundFromContext(ctx); inbound != nil && inbound.Source.IsValid() {
msg.From = inbound.Source
}
log.Record(msg)
}
link, err := w.dispatcher.Dispatch(ctx, meta.Target)
if err != nil {
if meta.Option.Has(OptionData) {
drain(NewStreamReader(reader))
}
return newError("failed to dispatch request.").Base(err)
}
s := &Session{
input: link.Reader,
output: link.Writer,
parent: w.sessionManager,
ID: meta.SessionID,
transferType: protocol.TransferTypeStream,
}
if meta.Target.Network == net.Network_UDP {
s.transferType = protocol.TransferTypePacket
}
w.sessionManager.Add(s)
go handle(ctx, s, w.link.Writer)
if !meta.Option.Has(OptionData) {
return nil
}
rr := s.NewReader(reader)
if err := buf.Copy(rr, s.output); err != nil {
drain(rr)
pipe.CloseError(s.input)
return s.Close()
}
return nil
}
func (w *ServerWorker) handleStatusKeep(meta *FrameMetadata, reader *buf.BufferedReader) error {
if !meta.Option.Has(OptionData) {
return nil
}
if s, found := w.sessionManager.Get(meta.SessionID); found {
rr := s.NewReader(reader)
if err := buf.Copy(rr, s.output); err != nil {
drain(rr)
pipe.CloseError(s.input)
return s.Close()
}
return nil
}
return drain(NewStreamReader(reader))
}
func (w *ServerWorker) handleStatusEnd(meta *FrameMetadata, reader *buf.BufferedReader) error {
if s, found := w.sessionManager.Get(meta.SessionID); found {
if meta.Option.Has(OptionError) {
pipe.CloseError(s.input)
pipe.CloseError(s.output)
}
s.Close()
}
if meta.Option.Has(OptionData) {
return drain(NewStreamReader(reader))
}
return nil
}
func (w *ServerWorker) handleFrame(ctx context.Context, reader *buf.BufferedReader) error {
var meta FrameMetadata
err := meta.Unmarshal(reader)
if err != nil {
return newError("failed to read metadata").Base(err)
}
switch meta.SessionStatus {
case SessionStatusKeepAlive:
err = w.handleStatusKeepAlive(&meta, reader)
case SessionStatusEnd:
err = w.handleStatusEnd(&meta, reader)
case SessionStatusNew:
err = w.handleStatusNew(ctx, &meta, reader)
case SessionStatusKeep:
err = w.handleStatusKeep(&meta, reader)
default:
status := meta.SessionStatus
return newError("unknown status: ", status).AtError()
}
if err != nil {
return newError("failed to process data").Base(err)
}
return nil
}
func (w *ServerWorker) run(ctx context.Context) {
input := w.link.Reader
reader := &buf.BufferedReader{Reader: input}
defer w.sessionManager.Close() // nolint: errcheck
for {
select {
case <-ctx.Done():
return
default:
err := w.handleFrame(ctx, reader)
if err != nil {
if errors.Cause(err) != io.EOF {
newError("unexpected EOF").Base(err).WriteToLog(session.ExportIDToError(ctx))
pipe.CloseError(input)
}
return
}
}
}
}

216
common/mux/server.go Normal file
View File

@ -0,0 +1,216 @@
package mux
import (
"context"
"io"
"v2ray.com/core"
"v2ray.com/core/common/buf"
"v2ray.com/core/common/errors"
"v2ray.com/core/common/log"
"v2ray.com/core/common/net"
"v2ray.com/core/common/protocol"
"v2ray.com/core/common/session"
"v2ray.com/core/common/vio"
"v2ray.com/core/features/routing"
"v2ray.com/core/transport/pipe"
)
type Server struct {
dispatcher routing.Dispatcher
}
// NewServer creates a new mux.Server.
func NewServer(ctx context.Context) *Server {
s := &Server{}
core.RequireFeatures(ctx, func(d routing.Dispatcher) {
s.dispatcher = d
})
return s
}
// Type implements common.HasType.
func (s *Server) Type() interface{} {
return s.dispatcher.Type()
}
// Dispatch impliments routing.Dispatcher
func (s *Server) Dispatch(ctx context.Context, dest net.Destination) (*vio.Link, error) {
if dest.Address != muxCoolAddress {
return s.dispatcher.Dispatch(ctx, dest)
}
opts := pipe.OptionsFromContext(ctx)
uplinkReader, uplinkWriter := pipe.New(opts...)
downlinkReader, downlinkWriter := pipe.New(opts...)
worker := &ServerWorker{
dispatcher: s.dispatcher,
link: &vio.Link{
Reader: uplinkReader,
Writer: downlinkWriter,
},
sessionManager: NewSessionManager(),
}
go worker.run(ctx)
return &vio.Link{Reader: downlinkReader, Writer: uplinkWriter}, nil
}
// Start implements common.Runnable.
func (s *Server) Start() error {
return nil
}
// Close implements common.Closable.
func (s *Server) Close() error {
return nil
}
type ServerWorker struct {
dispatcher routing.Dispatcher
link *vio.Link
sessionManager *SessionManager
}
func handle(ctx context.Context, s *Session, output buf.Writer) {
writer := NewResponseWriter(s.ID, output, s.transferType)
if err := buf.Copy(s.input, writer); err != nil {
newError("session ", s.ID, " ends.").Base(err).WriteToLog(session.ExportIDToError(ctx))
writer.hasError = true
}
writer.Close()
s.Close()
}
func (w *ServerWorker) handleStatusKeepAlive(meta *FrameMetadata, reader *buf.BufferedReader) error {
if meta.Option.Has(OptionData) {
return drain(NewStreamReader(reader))
}
return nil
}
func (w *ServerWorker) handleStatusNew(ctx context.Context, meta *FrameMetadata, reader *buf.BufferedReader) error {
newError("received request for ", meta.Target).WriteToLog(session.ExportIDToError(ctx))
{
msg := &log.AccessMessage{
To: meta.Target,
Status: log.AccessAccepted,
Reason: "",
}
if inbound := session.InboundFromContext(ctx); inbound != nil && inbound.Source.IsValid() {
msg.From = inbound.Source
}
log.Record(msg)
}
link, err := w.dispatcher.Dispatch(ctx, meta.Target)
if err != nil {
if meta.Option.Has(OptionData) {
drain(NewStreamReader(reader))
}
return newError("failed to dispatch request.").Base(err)
}
s := &Session{
input: link.Reader,
output: link.Writer,
parent: w.sessionManager,
ID: meta.SessionID,
transferType: protocol.TransferTypeStream,
}
if meta.Target.Network == net.Network_UDP {
s.transferType = protocol.TransferTypePacket
}
w.sessionManager.Add(s)
go handle(ctx, s, w.link.Writer)
if !meta.Option.Has(OptionData) {
return nil
}
rr := s.NewReader(reader)
if err := buf.Copy(rr, s.output); err != nil {
drain(rr)
pipe.CloseError(s.input)
return s.Close()
}
return nil
}
func (w *ServerWorker) handleStatusKeep(meta *FrameMetadata, reader *buf.BufferedReader) error {
if !meta.Option.Has(OptionData) {
return nil
}
if s, found := w.sessionManager.Get(meta.SessionID); found {
rr := s.NewReader(reader)
if err := buf.Copy(rr, s.output); err != nil {
drain(rr)
pipe.CloseError(s.input)
return s.Close()
}
return nil
}
return drain(NewStreamReader(reader))
}
func (w *ServerWorker) handleStatusEnd(meta *FrameMetadata, reader *buf.BufferedReader) error {
if s, found := w.sessionManager.Get(meta.SessionID); found {
if meta.Option.Has(OptionError) {
pipe.CloseError(s.input)
pipe.CloseError(s.output)
}
s.Close()
}
if meta.Option.Has(OptionData) {
return drain(NewStreamReader(reader))
}
return nil
}
func (w *ServerWorker) handleFrame(ctx context.Context, reader *buf.BufferedReader) error {
var meta FrameMetadata
err := meta.Unmarshal(reader)
if err != nil {
return newError("failed to read metadata").Base(err)
}
switch meta.SessionStatus {
case SessionStatusKeepAlive:
err = w.handleStatusKeepAlive(&meta, reader)
case SessionStatusEnd:
err = w.handleStatusEnd(&meta, reader)
case SessionStatusNew:
err = w.handleStatusNew(ctx, &meta, reader)
case SessionStatusKeep:
err = w.handleStatusKeep(&meta, reader)
default:
status := meta.SessionStatus
return newError("unknown status: ", status).AtError()
}
if err != nil {
return newError("failed to process data").Base(err)
}
return nil
}
func (w *ServerWorker) run(ctx context.Context) {
input := w.link.Reader
reader := &buf.BufferedReader{Reader: input}
defer w.sessionManager.Close() // nolint: errcheck
for {
select {
case <-ctx.Done():
return
default:
err := w.handleFrame(ctx, reader)
if err != nil {
if errors.Cause(err) != io.EOF {
newError("unexpected EOF").Base(err).WriteToLog(session.ExportIDToError(ctx))
pipe.CloseError(input)
}
return
}
}
}
}