initial commit

cmd/link.go

@@ -0,0 +1,136 @@
+package cmd
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+
+	"github.com/gorilla/websocket"
+	"github.com/spf13/cobra"
+)
+
+type TunnelRequest struct {
+	ID      string            `json:"id"`
+	Method  string            `json:"method"`
+	URL     string            `json:"url"`
+	Headers map[string]string `json:"headers"`
+	Body    []byte            `json:"body"`
+}
+
+type TunnelResponse struct {
+	ID         string            `json:"id"`
+	StatusCode int               `json:"status_code"`
+	Headers    map[string]string `json:"headers"`
+	Body       []byte            `json:"body"`
+}
+
+var serverAddr string
+
+var linkCmd = &cobra.Command{
+	Use:   "link <vhost_location> <local_port>",
+	Short: "Create a tunnel link",
+	Args:  cobra.ExactArgs(2),
+	Run: func(cmd *cobra.Command, args []string) {
+		vhostLoc := args[0]
+		localPort := args[1]
+
+		fmt.Printf("Creating tunnel: %s -> localhost:%s\n", vhostLoc, localPort)
+
+		if err := startTunnel(vhostLoc, localPort); err != nil {
+			log.Fatal("Failed to start tunnel:", err)
+		}
+	},
+}
+
+func init() {
+	linkCmd.Flags().StringVarP(&serverAddr, "server", "s", "localhost:8080", "Conduit server address")
+}
+
+func startTunnel(vhost, localPort string) error {
+	// Connect to WebSocket
+	wsURL := fmt.Sprintf("ws://%s/_conduit/tunnel?vhost=%s", serverAddr, vhost)
+	conn, _, err := websocket.DefaultDialer.Dial(wsURL, nil)
+	if err != nil {
+		return fmt.Errorf("failed to connect: %v", err)
+	}
+	defer conn.Close()
+
+	fmt.Printf("Tunnel active! %s.example.com -> localhost:%s\n", vhost, localPort)
+
+	// Handle incoming requests
+	for {
+		var req TunnelRequest
+		if err := conn.ReadJSON(&req); err != nil {
+			log.Printf("Error reading request: %v", err)
+			break
+		}
+
+		go handleTunnelRequest(conn, &req, localPort)
+	}
+
+	return nil
+}
+
+func handleTunnelRequest(conn *websocket.Conn, req *TunnelRequest, localPort string) {
+	// Make request to local service
+	localURL := fmt.Sprintf("http://localhost:%s%s", localPort, req.URL)
+
+	httpReq, err := http.NewRequest(req.Method, localURL, bytes.NewReader(req.Body))
+	if err != nil {
+		sendErrorResponse(conn, req.ID, 500, "Failed to create request")
+		return
+	}
+
+	// Set headers
+	for k, v := range req.Headers {
+		httpReq.Header.Set(k, v)
+	}
+
+	// Make the request
+	client := &http.Client{}
+	resp, err := client.Do(httpReq)
+	if err != nil {
+		sendErrorResponse(conn, req.ID, 502, "Failed to reach local service")
+		return
+	}
+	defer resp.Body.Close()
+
+	// Read response body
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		sendErrorResponse(conn, req.ID, 500, "Failed to read response")
+		return
+	}
+
+	// Convert response headers
+	headers := make(map[string]string)
+	for k, v := range resp.Header {
+		if len(v) > 0 {
+			headers[k] = v[0]
+		}
+	}
+
+	// Send response back
+	tunnelResp := &TunnelResponse{
+		ID:         req.ID,
+		StatusCode: resp.StatusCode,
+		Headers:    headers,
+		Body:       body,
+	}
+
+	if err := conn.WriteJSON(tunnelResp); err != nil {
+		log.Printf("Error sending response: %v", err)
+	}
+}
+
+func sendErrorResponse(conn *websocket.Conn, reqID string, statusCode int, message string) {
+	resp := &TunnelResponse{
+		ID:         reqID,
+		StatusCode: statusCode,
+		Headers:    map[string]string{"Content-Type": "text/plain"},
+		Body:       []byte(message),
+	}
+	conn.WriteJSON(resp)
+}

cmd/root.go

@@ -0,0 +1,26 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+var rootCmd = &cobra.Command{
+	Use:   "conduit",
+	Short: "A tunneling service similar to ngrok",
+	Long:  `Conduit allows you to expose local services through secure tunnels`,
+}
+
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}
+
+func init() {
+	rootCmd.AddCommand(serveCmd)
+	rootCmd.AddCommand(linkCmd)
+}

cmd/serve.go

@@ -0,0 +1,30 @@
+package cmd
+
+import (
+	"fmt"
+	"log"
+
+	"reichard.io/conduit/server"
+
+	"github.com/spf13/cobra"
+)
+
+var port string
+
+var serveCmd = &cobra.Command{
+	Use:   "serve",
+	Short: "Start the conduit server",
+	Long:  `Start the conduit server to handle incoming tunnel requests`,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Printf("Starting Conduit server on port %s...\n", port)
+
+		srv := server.NewServer()
+		if err := srv.Start(":" + port); err != nil {
+			log.Fatal("Failed to start server:", err)
+		}
+	},
+}
+
+func init() {
+	serveCmd.Flags().StringVarP(&port, "port", "p", "8080", "Port to run the server on")
+}