feat: use a debug logger for agent

agent/internal/hpagent/websocket.go

@@ -0,0 +1,67 @@
+package hpagent
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+
+	"github.com/gorilla/websocket"
+	"github.com/tale/headplane/agent/internal/config"
+	"github.com/tale/headplane/agent/internal/tsnet"
+	"github.com/tale/headplane/agent/internal/util"
+)
+
+type Socket struct {
+	*websocket.Conn
+	Agent *tsnet.TSAgent
+}
+
+// Creates a new websocket connection to the Headplane server.
+func NewSocket(agent *tsnet.TSAgent, cfg *config.Config) (*Socket, error) {
+	log := util.GetLogger()
+
+	wsURL, err := httpToWs(cfg.HPControlURL)
+	if err != nil {
+		return nil, err
+	}
+
+	headers := http.Header{}
+	headers.Add("X-Headplane-Tailnet-ID", agent.ID)
+	auth := fmt.Sprintf("Bearer %s", cfg.HPAuthKey)
+	headers.Add("Authorization", auth)
+
+	log.Info("Dialing WebSocket with master: %s", wsURL)
+	ws, _, err := websocket.DefaultDialer.Dial(wsURL, headers)
+	if err != nil {
+		log.Debug("Failed to dial WebSocket: %s", err)
+		return nil, err
+	}
+
+	return &Socket{ws, agent}, nil
+}
+
+// We need to convert the control URL to a websocket URL
+func httpToWs(controlURL string) (string, error) {
+	log := util.GetLogger()
+	u, err := url.Parse(controlURL)
+	if err != nil {
+		log.Debug("Failed to parse control URL: %s", err)
+		return "", err
+	}
+
+	if u.Scheme == "http" {
+		u.Scheme = "ws"
+	} else if u.Scheme == "https" {
+		u.Scheme = "wss"
+	} else {
+		return "", fmt.Errorf("unsupported scheme: %s", u.Scheme)
+	}
+
+	// We also need to append /_dial to the path
+	if u.Path[len(u.Path)-1] != '/' {
+		u.Path += "/"
+	}
+
+	u.Path += "_dial"
+	return u.String(), nil
+}