/
server.go
132 lines (114 loc) · 2.69 KB
/
server.go
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package server
import (
"context"
"crypto/tls"
"crypto/x509"
"io/ioutil"
"log"
"net"
"net/http"
"github.com/gorilla/websocket"
"github.com/fanzy618/wsproxy/common"
)
var upgrader = websocket.Upgrader{
ReadBufferSize: common.BufferSize,
WriteBufferSize: common.BufferSize,
}
const echoAddr = "127.0.0.1:11234"
const proxyAddr = "127.0.0.1:13128"
// Proxy handle URL like "/proxy?des=127.0.0.1:3128"
func Proxy(w http.ResponseWriter, r *http.Request) {
c, err := upgrader.Upgrade(w, r, nil)
if err != nil {
log.Println("upgrade:", err)
w.WriteHeader(500)
return
}
defer c.Close()
log.Println("Handle request: ", r.URL.String())
defer log.Println("Close request ", r.URL.String())
dst := r.URL.Query().Get("dst")
if dst == "echo" || dst == "" {
dst = echoAddr
}
if dst == "proxy" {
dst = proxyAddr
}
addr, err := net.ResolveTCPAddr("tcp4", dst)
if err != nil {
log.Println("Resolve ", dst, " failed: ", err.Error())
w.WriteHeader(500)
return
}
conn, err := net.DialTCP("tcp4", nil, addr)
if err != nil {
log.Println("Connect to ", dst, " failed: ", err.Error())
w.WriteHeader(500)
return
}
defer conn.Close()
conn.SetReadBuffer(common.BufferSize)
conn.SetWriteBuffer(common.BufferSize)
log.Println("Connect to ", dst, " succeed!")
ctx, cancel := context.WithCancel(context.Background())
go common.Ws2Tcp(ctx, cancel, c, conn)
go common.TCP2Ws(ctx, cancel, c, conn)
for {
select {
case <-ctx.Done():
return
}
}
}
// Config for server
type Config struct {
WebSocketAddr string
QuicAddr string
ServerKey string
ServerCA string
RootCA string
ProxyEnable bool
EchoEnable bool
}
// OK return string "OK" for test and health check
func OK(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("OK"))
}
// Main is the entry point of server
func Main(ctx context.Context, cfg Config) {
if cfg.EchoEnable {
go echoMain(ctx, echoAddr)
}
if cfg.ProxyEnable {
go ProxyMain(ctx, proxyAddr)
}
http.HandleFunc("/proxy", Proxy)
http.HandleFunc("/", OK)
if cfg.ServerCA != "" && cfg.ServerKey != "" {
var server *http.Server
var tlsCfg *tls.Config
if cfg.RootCA != "" {
clientCA, err := ioutil.ReadFile(cfg.RootCA)
if err != nil {
log.Fatal(err)
}
caCertPool := x509.NewCertPool()
caCertPool.AppendCertsFromPEM(clientCA)
tlsCfg = &tls.Config{
ClientAuth: tls.RequireAndVerifyClientCert,
ClientCAs: caCertPool,
}
}
addr := cfg.WebSocketAddr
if addr == "" {
addr = ":443"
}
server = &http.Server{
Addr: cfg.WebSocketAddr,
TLSConfig: tlsCfg,
}
log.Fatalln(server.ListenAndServeTLS(cfg.ServerCA, cfg.ServerKey))
return
}
log.Fatalln(http.ListenAndServe(cfg.WebSocketAddr, nil))
}