128 lines
2.4 KiB
Go
128 lines
2.4 KiB
Go
package http2
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import (
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"crypto/tls"
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"net"
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"net/http"
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admission "github.com/go-gost/gost/v3/pkg/admission/wrapper"
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"github.com/go-gost/gost/v3/pkg/listener"
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"github.com/go-gost/gost/v3/pkg/logger"
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md "github.com/go-gost/gost/v3/pkg/metadata"
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"github.com/go-gost/gost/v3/pkg/registry"
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metrics "github.com/go-gost/metrics/wrapper"
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"golang.org/x/net/http2"
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)
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func init() {
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registry.ListenerRegistry().Register("http2", NewListener)
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}
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type http2Listener struct {
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server *http.Server
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addr net.Addr
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cqueue chan net.Conn
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errChan chan error
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logger logger.Logger
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md metadata
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options listener.Options
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}
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func NewListener(opts ...listener.Option) listener.Listener {
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options := listener.Options{}
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for _, opt := range opts {
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opt(&options)
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}
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return &http2Listener{
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logger: options.Logger,
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options: options,
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}
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}
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func (l *http2Listener) Init(md md.Metadata) (err error) {
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if err = l.parseMetadata(md); err != nil {
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return
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}
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l.server = &http.Server{
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Addr: l.options.Addr,
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Handler: http.HandlerFunc(l.handleFunc),
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TLSConfig: l.options.TLSConfig,
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}
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if err := http2.ConfigureServer(l.server, nil); err != nil {
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return err
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}
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ln, err := net.Listen("tcp", l.options.Addr)
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if err != nil {
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return err
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}
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l.addr = ln.Addr()
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ln = metrics.WrapListener(l.options.Service, ln)
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ln = admission.WrapListener(l.options.Admission, ln)
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ln = tls.NewListener(
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ln,
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l.options.TLSConfig,
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)
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l.cqueue = make(chan net.Conn, l.md.backlog)
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l.errChan = make(chan error, 1)
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go func() {
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if err := l.server.Serve(ln); err != nil {
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l.logger.Error(err)
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}
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}()
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return
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}
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func (l *http2Listener) Accept() (conn net.Conn, err error) {
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var ok bool
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select {
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case conn = <-l.cqueue:
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case err, ok = <-l.errChan:
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if !ok {
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err = listener.ErrClosed
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}
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}
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return
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}
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func (l *http2Listener) Addr() net.Addr {
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return l.addr
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}
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func (l *http2Listener) Close() (err error) {
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select {
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case <-l.errChan:
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default:
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err = l.server.Close()
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l.errChan <- err
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close(l.errChan)
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}
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return nil
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}
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func (l *http2Listener) handleFunc(w http.ResponseWriter, r *http.Request) {
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raddr, _ := net.ResolveTCPAddr("tcp", r.RemoteAddr)
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conn := &conn{
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laddr: l.addr,
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raddr: raddr,
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closed: make(chan struct{}),
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md: md.MapMetadata{
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"r": r,
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"w": w,
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},
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}
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select {
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case l.cqueue <- conn:
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default:
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l.logger.Warnf("connection queue is full, client %s discarded", r.RemoteAddr)
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return
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}
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<-conn.Done()
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}
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