feat: create initial agent for localapi

agent/hpagent/websocket.go

@@ -0,0 +1,53 @@
+package hpagent
+
+import (
+	"fmt"
+	"github.com/gorilla/websocket"
+	"github.com/tale/headplane/agent/tsnet"
+	"log"
+	"net/http"
+	"net/url"
+)
+
+type Socket struct {
+	*websocket.Conn
+	Debug bool
+	Agent *tsnet.TSAgent
+}
+
+// Creates a new websocket connection to the Headplane server.
+func NewSocket(agent *tsnet.TSAgent, controlURL string, debug bool) (*Socket, error) {
+	wsURL, err := httpToWs(controlURL)
+	if err != nil {
+		return nil, err
+	}
+
+	headers := http.Header{}
+	headers.Add("X-Headplane-TS-Node-ID", agent.ID)
+
+	log.Printf("dialing websocket at %s", wsURL)
+	ws, _, err := websocket.DefaultDialer.Dial(wsURL, headers)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Socket{ws, debug, agent}, nil
+}
+
+// We need to convert the control URL to a websocket URL
+func httpToWs(controlURL string) (string, error) {
+	u, err := url.Parse(controlURL)
+	if err != nil {
+		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)
+	}
+
+	return u.String(), nil
+}