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whep_handler.go
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whep_handler.go
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package media
import (
"crypto/md5"
"errors"
"fmt"
"net/http"
"strconv"
"github.com/pion/webrtc/v3"
"github.com/shigde/sfu/internal/auth"
"github.com/shigde/sfu/internal/lobby"
"github.com/shigde/sfu/internal/stream"
"github.com/shigde/sfu/internal/telemetry"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
)
func whep(streamService *stream.LiveStreamService, liveService *stream.LiveLobbyService) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
ctx, span := otel.Tracer(tracerName).Start(r.Context(), "api: whep_create")
defer span.End()
w.Header().Set("Content-Type", "application/sdp")
user, err := auth.GetPrincipalFromSession(r)
if err != nil {
switch {
case errors.Is(err, auth.ErrNotAuthenticatedSession):
httpError(w, "no session", http.StatusForbidden, err)
case errors.Is(err, auth.ErrNoUserSession):
httpError(w, "no user session", http.StatusForbidden, err)
default:
httpError(w, "internal error", http.StatusInternalServerError, err)
}
_ = telemetry.RecordError(span, err)
return
}
userId, err := user.GetUuid()
if err != nil {
_ = telemetry.RecordError(span, err)
httpError(w, "error user", http.StatusBadRequest, err)
return
}
liveStream, _, err := getLiveStream(r, streamService)
if err != nil {
_ = telemetry.RecordError(span, err)
handleResourceError(w, err)
return
}
offer, err := getSdpPayload(w, r, webrtc.SDPTypeOffer)
if err != nil {
_ = telemetry.RecordError(span, err)
w.WriteHeader(http.StatusBadRequest)
return
}
// track request meta by otel
span.SetAttributes(
attribute.String("streamId", liveStream.UUID.String()),
attribute.String("userId", userId.String()),
)
answer, resourceId, err := liveService.CreateLobbyEgressEndpoint(ctx, offer, liveStream, userId)
if err != nil && errors.Is(err, lobby.ErrSessionAlreadyExists) {
w.WriteHeader(http.StatusConflict)
_ = telemetry.RecordError(span, err)
httpError(w, "session already exists", http.StatusConflict, err)
return
}
if err != nil {
_ = telemetry.RecordError(span, err)
httpError(w, "error build whep", http.StatusInternalServerError, err)
return
}
span.SetAttributes(attribute.String("sessionId", resourceId))
response := []byte(answer.SDP)
hash := md5.Sum(response)
w.WriteHeader(http.StatusCreated)
w.Header().Set("etag", fmt.Sprintf("%x", hash))
w.Header().Set("Location", "resource/"+resourceId)
contentLen, err := w.Write(response)
if err != nil {
_ = telemetry.RecordError(span, err)
httpError(w, "error build response", http.StatusInternalServerError, err)
return
}
w.Header().Set("Content-Length", strconv.Itoa(contentLen))
}
}
// old api -----
func whepOffer(streamService *stream.LiveStreamService, liveService *stream.LiveLobbyService) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
ctx, span := otel.Tracer(tracerName).Start(r.Context(), "whep_offer")
defer span.End()
w.Header().Set("Content-Type", "application/sdp")
user, err := auth.GetPrincipalFromSession(r)
if err != nil {
switch {
case errors.Is(err, auth.ErrNotAuthenticatedSession):
httpError(w, "no session", http.StatusForbidden, err)
case errors.Is(err, auth.ErrNoUserSession):
httpError(w, "no user session", http.StatusForbidden, err)
default:
httpError(w, "internal error", http.StatusInternalServerError, err)
}
telemetry.RecordError(span, err)
return
}
userId, err := user.GetUuid()
if err != nil {
telemetry.RecordError(span, err)
httpError(w, "error user", http.StatusBadRequest, err)
return
}
liveStream, _, err := getLiveStream(r, streamService)
if err != nil {
telemetry.RecordError(span, err)
handleResourceError(w, err)
return
}
answer, err := liveService.InitLobbyEgressEndpoint(ctx, liveStream, userId)
if err != nil && errors.Is(err, stream.ErrLobbyNotActive) {
telemetry.RecordError(span, err)
w.WriteHeader(http.StatusNotFound)
return
}
if err != nil {
telemetry.RecordError(span, err)
httpError(w, "error build whep", http.StatusInternalServerError, err)
return
}
response := []byte(answer.SDP)
hash := md5.Sum(response)
w.WriteHeader(http.StatusCreated)
contentLen, err := w.Write(response)
if err != nil {
telemetry.RecordError(span, err)
httpError(w, "error build response", http.StatusInternalServerError, err)
return
}
w.Header().Set("etag", fmt.Sprintf("%x", hash))
w.Header().Set("Content-Length", strconv.Itoa(contentLen))
}
}