88 lines
2.0 KiB
Go
88 lines
2.0 KiB
Go
package main
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import (
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"context"
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"net"
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"net/http"
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"net/http/httputil"
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"net/url"
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"strings"
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"time"
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"cdr.dev/slog"
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"forge.cadoles.com/wpetit/go-tunnel"
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"github.com/pkg/errors"
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"gitlab.com/wpetit/goweb/logger"
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)
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const sharedKey = "go-tunnel"
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const salt = "go-tunnel"
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var registry = NewRegistry()
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func main() {
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ctx := context.Background()
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logger.SetLevel(slog.LevelDebug)
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server := tunnel.NewServer(
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tunnel.WithServerAESBlockCrypt(sharedKey, salt),
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tunnel.WithServerOnClientAuth(registry.OnClientAuth),
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tunnel.WithServerOnClientDisconnect(registry.OnClientDisconnect),
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)
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go func() {
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if err := server.Listen(ctx); err != nil {
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logger.Fatal(ctx, "error while listening", logger.E(err))
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}
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}()
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if err := http.ListenAndServe(":3003", http.HandlerFunc(handleRequest)); err != nil {
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logger.Fatal(ctx, "error while listening", logger.E(err))
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}
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}
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func handleRequest(w http.ResponseWriter, r *http.Request) {
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subdomains := strings.SplitN(r.Host, ".", 2)
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if len(subdomains) < 2 {
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http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
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return
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}
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clientID := subdomains[0]
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remoteClient := registry.Get(clientID)
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if remoteClient == nil {
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http.Error(w, http.StatusText(http.StatusBadGateway), http.StatusBadGateway)
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return
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}
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target, err := url.Parse("http://localhost:3000")
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if err != nil {
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logger.Fatal(r.Context(), "could not parse url", logger.E(err))
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}
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reverse := httputil.NewSingleHostReverseProxy(target)
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reverse.Transport = &http.Transport{
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Proxy: http.ProxyFromEnvironment,
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DialContext: func(ctx context.Context, network string, addr string) (net.Conn, error) {
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conn, err := remoteClient.Proxy(ctx, network, addr)
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if err != nil {
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return nil, errors.WithStack(err)
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}
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return conn, nil
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},
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ForceAttemptHTTP2: true,
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MaxIdleConns: 100,
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IdleConnTimeout: 90 * time.Second,
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TLSHandshakeTimeout: 10 * time.Second,
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ExpectContinueTimeout: 1 * time.Second,
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}
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reverse.ServeHTTP(w, r)
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}
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