/
securetunnel_server.go
139 lines (109 loc) · 2.61 KB
/
securetunnel_server.go
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package testutil
import (
"context"
"fmt"
"net"
"net/http"
"net/url"
"time"
"github.com/gorilla/websocket"
"github.com/mizosukedev/securetunnel/aws"
"google.golang.org/protobuf/proto"
)
type ReadMessageResult struct {
MessageType int
Message []byte
Err error
}
func (result *ReadMessageResult) UnmarshalMessage() (*aws.Message, error) {
message := &aws.Message{}
err := proto.Unmarshal(result.Message[aws.SizeOfMessageSize:], message)
return message, err
}
type SecureTunnelServer struct {
Host string
Endpoint *url.URL
ChRequest chan *http.Request
ChMessage chan *ReadMessageResult
ChWebSocket chan *websocket.Conn
ChPing chan string
RequestHandler func(w http.ResponseWriter, r *http.Request) (endResponse bool)
}
func NewSecureTunnelServer() *SecureTunnelServer {
address := FreeLocalAddress()
endpoint := fmt.Sprintf("ws://%s/tunnel", address)
endpointURL, err := url.Parse(endpoint)
if err != nil {
panic(err)
}
instance := &SecureTunnelServer{
Host: address,
Endpoint: endpointURL,
ChRequest: make(chan *http.Request, 10),
ChMessage: make(chan *ReadMessageResult, 10),
ChWebSocket: make(chan *websocket.Conn, 10),
ChPing: make(chan string, 100),
}
return instance
}
func (server *SecureTunnelServer) Start(ctx context.Context) {
serverMux := http.NewServeMux()
serverMux.HandleFunc("/tunnel", server.handleTunnel)
httpServer := http.Server{
Addr: server.Host,
Handler: serverMux,
}
go func() {
err := httpServer.ListenAndServe()
fmt.Println(err)
}()
go func() {
<-ctx.Done()
httpServer.Shutdown(ctx)
}()
connected := false
maxRetry := 5
for i := 0; i < maxRetry; i++ {
con, err := net.Dial("tcp", server.Host)
if err == nil {
con.Close()
connected = true
break
}
time.Sleep(time.Millisecond * 200)
}
if !connected {
panic("failed to start http server")
}
}
func (server *SecureTunnelServer) handleTunnel(w http.ResponseWriter, r *http.Request) {
server.ChRequest <- r
if server.RequestHandler != nil {
endResponse := server.RequestHandler(w, r)
if endResponse {
return
}
}
upgrader := websocket.Upgrader{}
ws, err := upgrader.Upgrade(w, r, nil)
if err != nil {
panic("failed to upgrade websocket")
}
ws.SetPingHandler(func(appData string) error {
server.ChPing <- appData
return nil
})
server.ChWebSocket <- ws
defer ws.Close()
for {
wsMessageType, wsMessageBin, err := ws.ReadMessage()
server.ChMessage <- &ReadMessageResult{
MessageType: wsMessageType,
Message: wsMessageBin,
Err: err,
}
if err != nil {
return
}
}
}