/
listener.go
165 lines (144 loc) · 3.76 KB
/
listener.go
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package ws
import (
"context"
"crypto/tls"
"net"
"net/http"
"net/http/httputil"
"time"
"github.com/gorilla/websocket"
"github.com/jxo-me/netx/core/listener"
"github.com/jxo-me/netx/core/logger"
md "github.com/jxo-me/netx/core/metadata"
admission "github.com/jxo-me/netx/x/admission/wrapper"
xnet "github.com/jxo-me/netx/x/internal/net"
"github.com/jxo-me/netx/x/internal/net/proxyproto"
ws_util "github.com/jxo-me/netx/x/internal/util/ws"
climiter "github.com/jxo-me/netx/x/limiter/conn/wrapper"
limiter "github.com/jxo-me/netx/x/limiter/traffic/wrapper"
metrics "github.com/jxo-me/netx/x/metrics/wrapper"
stats "github.com/jxo-me/netx/x/stats/wrapper"
)
type wsListener struct {
addr net.Addr
upgrader *websocket.Upgrader
srv *http.Server
tlsEnabled bool
cqueue chan net.Conn
errChan chan error
logger logger.ILogger
md metadata
options listener.Options
}
func NewListener(opts ...listener.Option) listener.IListener {
options := listener.Options{}
for _, opt := range opts {
opt(&options)
}
return &wsListener{
logger: options.Logger,
options: options,
}
}
func NewTLSListener(opts ...listener.Option) listener.IListener {
options := listener.Options{}
for _, opt := range opts {
opt(&options)
}
return &wsListener{
tlsEnabled: true,
logger: options.Logger,
options: options,
}
}
func (l *wsListener) Init(md md.IMetaData) (err error) {
if err = l.parseMetadata(md); err != nil {
return
}
l.upgrader = &websocket.Upgrader{
HandshakeTimeout: l.md.handshakeTimeout,
ReadBufferSize: l.md.readBufferSize,
WriteBufferSize: l.md.writeBufferSize,
EnableCompression: l.md.enableCompression,
CheckOrigin: func(r *http.Request) bool { return true },
}
mux := http.NewServeMux()
mux.Handle(l.md.path, http.HandlerFunc(l.upgrade))
l.srv = &http.Server{
Addr: l.options.Addr,
Handler: mux,
ReadHeaderTimeout: l.md.readHeaderTimeout,
}
l.cqueue = make(chan net.Conn, l.md.backlog)
l.errChan = make(chan error, 1)
network := "tcp"
if xnet.IsIPv4(l.options.Addr) {
network = "tcp4"
}
lc := net.ListenConfig{}
if l.md.mptcp {
lc.SetMultipathTCP(true)
l.logger.Debugf("mptcp enabled: %v", lc.MultipathTCP())
}
ln, err := lc.Listen(context.Background(), network, l.options.Addr)
if err != nil {
return
}
ln = proxyproto.WrapListener(l.options.ProxyProtocol, ln, 10*time.Second)
ln = metrics.WrapListener(l.options.Service, ln)
ln = stats.WrapListener(ln, l.options.Stats)
ln = admission.WrapListener(l.options.Admission, ln)
ln = limiter.WrapListener(l.options.TrafficLimiter, ln)
ln = climiter.WrapListener(l.options.ConnLimiter, ln)
if l.tlsEnabled {
ln = tls.NewListener(ln, l.options.TLSConfig)
}
l.addr = ln.Addr()
go func() {
err := l.srv.Serve(ln)
if err != nil {
l.errChan <- err
}
close(l.errChan)
}()
return
}
func (l *wsListener) Accept() (conn net.Conn, err error) {
var ok bool
select {
case conn = <-l.cqueue:
case err, ok = <-l.errChan:
if !ok {
err = listener.ErrClosed
}
}
return
}
func (l *wsListener) Close() error {
return l.srv.Close()
}
func (l *wsListener) Addr() net.Addr {
return l.addr
}
func (l *wsListener) upgrade(w http.ResponseWriter, r *http.Request) {
if l.logger.IsLevelEnabled(logger.TraceLevel) {
log := l.logger.WithFields(map[string]any{
"local": l.addr.String(),
"remote": r.RemoteAddr,
})
dump, _ := httputil.DumpRequest(r, false)
log.Trace(string(dump))
}
conn, err := l.upgrader.Upgrade(w, r, l.md.header)
if err != nil {
l.logger.Error(err)
w.WriteHeader(http.StatusInternalServerError)
return
}
select {
case l.cqueue <- ws_util.Conn(conn):
default:
conn.Close()
l.logger.Warnf("connection queue is full, client %s discarded", conn.RemoteAddr())
}
}