Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
1 parent
a90ddf5
commit efd58c5
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,180 @@ | ||
| package localserver | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/base64" | ||
| "encoding/json" | ||
| "errors" | ||
| "fmt" | ||
| "log/slog" | ||
| "net/http" | ||
|
|
||
| "github.com/kolide/launcher/pkg/traces" | ||
| webrtc "github.com/pion/webrtc/v4" | ||
| ) | ||
|
|
||
| func (ls *localServer) webrtcHandler() http.Handler { | ||
| return http.HandlerFunc(ls.webrtcHandlerFunc) | ||
| } | ||
|
|
||
| type ( | ||
| webrtcConnectionHandler struct { | ||
| conn *webrtc.PeerConnection | ||
| slogger *slog.Logger | ||
| shutdown chan struct{} | ||
| } | ||
|
|
||
| webrtcRequest struct { | ||
| SessionDescription string `json:"client_session_description"` | ||
| } | ||
|
|
||
| webrtcResponse struct { | ||
| ClientSDP string `json:"client_sdp"` | ||
| LauncherSDP string `json:"launcher_sdp"` | ||
| } | ||
| ) | ||
|
|
||
| func (ls *localServer) webrtcHandlerFunc(w http.ResponseWriter, r *http.Request) { | ||
| r, span := traces.StartHttpRequestSpan(r, "path", r.URL.Path) | ||
| defer span.End() | ||
|
|
||
| if r.Body == nil { | ||
| sendClientError(w, span, errors.New("webrtc request body is nil")) | ||
| return | ||
| } | ||
|
|
||
| var body webrtcRequest | ||
| if err := json.NewDecoder(r.Body).Decode(&body); err != nil { | ||
| sendClientError(w, span, fmt.Errorf("error unmarshaling request body: %w", err)) | ||
| return | ||
| } | ||
|
|
||
| h, err := ls.newWebrtcHandler(body.SessionDescription) | ||
| if err != nil { | ||
| h.close() | ||
| sendClientError(w, span, fmt.Errorf("error creating webrtc handler: %w", err)) | ||
| return | ||
| } | ||
|
|
||
| localSessionDescription, err := h.localDescription() | ||
| if err != nil { | ||
| h.close() | ||
| sendClientError(w, span, fmt.Errorf("error getting webrtc session description: %w", err)) | ||
| return | ||
| } | ||
|
|
||
| // Set the conn handler on localserver so we can shut it down | ||
| ls.setWebrtcConn(h) | ||
|
|
||
| // TODO RM: Send localSessionDescription in callback -- for now, just logs | ||
| respBody := webrtcResponse{ | ||
| ClientSDP: body.SessionDescription, | ||
| LauncherSDP: localSessionDescription, | ||
| } | ||
| ls.slogger.Log(r.Context(), slog.LevelInfo, | ||
| "got local session description", | ||
| "description", localSessionDescription, | ||
| "resp", respBody, | ||
| ) | ||
|
|
||
| go h.run() | ||
| } | ||
|
|
||
| func (ls *localServer) newWebrtcHandler(sessionDescriptionRaw string) (*webrtcConnectionHandler, error) { | ||
| conn, err := webrtc.NewPeerConnection(webrtc.Configuration{}) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("creating peer connection: %w", err) | ||
| } | ||
|
|
||
| w := &webrtcConnectionHandler{ | ||
| conn: conn, | ||
| slogger: ls.slogger.With("component", "webrtc_handler"), | ||
| shutdown: make(chan struct{}), | ||
| } | ||
|
|
||
| // Prepare our handlers | ||
| w.conn.OnConnectionStateChange(w.handleWebrtcConnectionStateChange) | ||
| w.conn.OnDataChannel(w.handleDataChannel) | ||
|
|
||
| // Extract and set remote description | ||
| remoteDescription, err := extractRemoteDescription(sessionDescriptionRaw) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("extracting remote description from request: %w", err) | ||
| } | ||
| if err := w.conn.SetRemoteDescription(remoteDescription); err != nil { | ||
| return nil, fmt.Errorf("setting remote description: %w", err) | ||
| } | ||
|
|
||
| // Create local description | ||
| answer, err := w.conn.CreateAnswer(nil) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("creating local description: %w", err) | ||
| } | ||
| if err := w.conn.SetLocalDescription(answer); err != nil { | ||
| return nil, fmt.Errorf("setting local description: %w", err) | ||
| } | ||
|
|
||
| return w, nil | ||
| } | ||
|
|
||
| func extractRemoteDescription(sessionDescriptionRaw string) (webrtc.SessionDescription, error) { | ||
| descriptionDecoded, err := base64.StdEncoding.DecodeString(sessionDescriptionRaw) | ||
| if err != nil { | ||
| return webrtc.SessionDescription{}, fmt.Errorf("decoding session description: %w", err) | ||
| } | ||
|
|
||
| var remoteDescription webrtc.SessionDescription | ||
| if err := json.Unmarshal(descriptionDecoded, &remoteDescription); err != nil { | ||
| return remoteDescription, fmt.Errorf("unmarshalling session description: %w", err) | ||
| } | ||
|
|
||
| return remoteDescription, nil | ||
| } | ||
|
|
||
| func (w *webrtcConnectionHandler) handleDataChannel(d *webrtc.DataChannel) { | ||
| d.OnOpen(func() { | ||
| w.slogger.Log(context.TODO(), slog.LevelInfo, | ||
| "data channel opened", | ||
| ) | ||
| }) | ||
|
|
||
| d.OnMessage(func(msg webrtc.DataChannelMessage) { | ||
| w.slogger.Log(context.TODO(), slog.LevelInfo, | ||
| "received message", | ||
| "message", string(msg.Data), | ||
| ) | ||
| }) | ||
| } | ||
|
|
||
| func (w *webrtcConnectionHandler) handleWebrtcConnectionStateChange(s webrtc.PeerConnectionState) { | ||
| w.slogger.Log(context.TODO(), slog.LevelInfo, | ||
| "peer connection state has changed", | ||
| "new_state", s.String(), | ||
| ) | ||
|
|
||
| if s == webrtc.PeerConnectionStateFailed || s == webrtc.PeerConnectionStateClosed { | ||
| w.shutdown <- struct{}{} | ||
| } | ||
| } | ||
|
|
||
| func (w *webrtcConnectionHandler) localDescription() (string, error) { | ||
| descriptionRaw, err := json.Marshal(w.conn.LocalDescription()) | ||
| if err != nil { | ||
| return "", fmt.Errorf("marshalling local description: %w", err) | ||
| } | ||
|
|
||
| return base64.StdEncoding.EncodeToString(descriptionRaw), nil | ||
| } | ||
|
|
||
| func (w *webrtcConnectionHandler) run() { | ||
| <-w.shutdown | ||
| w.close() | ||
| } | ||
|
|
||
| func (w *webrtcConnectionHandler) close() { | ||
| w.slogger.Log(context.TODO(), slog.LevelInfo, | ||
| "shutting down", | ||
| ) | ||
| w.conn.Close() | ||
| // TODO RM: This requires a refactor to be able to set ls.webrtcConn to nil after close | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| package localserver | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "log/slog" | ||
| "testing" | ||
| "time" | ||
|
|
||
| "github.com/kolide/launcher/pkg/log/multislogger" | ||
| "github.com/kolide/launcher/pkg/threadsafebuffer" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| func TestWebrtc(t *testing.T) { | ||
|
Check failure on line 14 in ee/localserver/webrtc_test.go
|
||
| // Paste from Fiddle https://jsfiddle.net/e41tgovp/ | ||
| remoteSessionDescription := "" | ||
|
|
||
| var logBytes threadsafebuffer.ThreadSafeBuffer | ||
| slogger := multislogger.New(slog.NewJSONHandler(&logBytes, &slog.HandlerOptions{Level: slog.LevelDebug})) | ||
| ls := localServer{ | ||
| slogger: slogger.Logger, | ||
| } | ||
|
|
||
| conn, err := ls.newWebrtcHandler(remoteSessionDescription) | ||
| require.NoError(t, err) | ||
|
|
||
| defer conn.close() | ||
|
|
||
| localSessionDescription, err := conn.localDescription() | ||
| require.NoError(t, err) | ||
|
|
||
| fmt.Println(localSessionDescription) | ||
|
|
||
| time.Sleep(1 * time.Minute) | ||
|
|
||
| fmt.Println(logBytes.String()) | ||
| } | ||
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.