func (s *httpServer) getExistingTopicFromQuery(req *http.Request) (*http_api.ReqParams, *Topic, string, error) {
reqParams, err := http_api.NewReqParams(req)
if err != nil {
s.ctx.nsqd.logf("ERROR: failed to parse request params - %s", err)
return nil, nil, "", http_api.Err{400, "INVALID_REQUEST"}
}
topicName, channelName, err := http_api.GetTopicChannelArgs(reqParams)
if err != nil {
return nil, nil, "", http_api.Err{400, err.Error()}
}
topic, err := s.ctx.nsqd.GetExistingTopic(topicName)
if err != nil {
return nil, nil, "", http_api.Err{404, "TOPIC_NOT_FOUND"}
}
return reqParams, topic, channelName, err
}
func (s *httpServer) doCreateChannel(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
reqParams, err := http_api.NewReqParams(req)
if err != nil {
return nil, http_api.Err{400, "INVALID_REQUEST"}
}
topicName, channelName, err := http_api.GetTopicChannelArgs(reqParams)
if err != nil {
return nil, http_api.Err{400, err.Error()}
}
s.ctx.nsqlookupd.logf("DB: adding channel(%s) in topic(%s)", channelName, topicName)
key := Registration{"channel", topicName, channelName}
s.ctx.nsqlookupd.DB.AddRegistration(key)
s.ctx.nsqlookupd.logf("DB: adding topic(%s)", topicName)
key = Registration{"topic", topicName, ""}
s.ctx.nsqlookupd.DB.AddRegistration(key)
return nil, nil
}
func (s *httpServer) doDeleteChannel(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
reqParams, err := http_api.NewReqParams(req)
if err != nil {
return nil, http_api.Err{400, "INVALID_REQUEST"}
}
topicName, channelName, err := http_api.GetTopicChannelArgs(reqParams)
if err != nil {
return nil, http_api.Err{400, err.Error()}
}
registrations := s.ctx.nsqlookupd.DB.FindRegistrations("channel", topicName, channelName)
if len(registrations) == 0 {
return nil, http_api.Err{404, "CHANNEL_NOT_FOUND"}
}
s.ctx.nsqlookupd.logf("DB: removing channel(%s) from topic(%s)", channelName, topicName)
for _, registration := range registrations {
s.ctx.nsqlookupd.DB.RemoveRegistration(registration)
}
return nil, nil
}
func (s *StreamServer) ServeHTTP(w http.ResponseWriter, req *http.Request) {
path := req.URL.Path
if path == "/stats" {
StatsHandler(w, req)
return
}
if path != "/sub" {
w.WriteHeader(404)
return
}
reqParams, err := http_api.NewReqParams(req)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
topicName, channelName, err := http_api.GetTopicChannelArgs(reqParams)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
hj, ok := w.(http.Hijacker)
if !ok {
http.Error(w, "httpserver doesn't support hijacking", http.StatusInternalServerError)
return
}
conn, bufrw, err := hj.Hijack()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
cfg := nsq.NewConfig()
cfg.UserAgent = fmt.Sprintf("nsq_pubsub/%s go-nsq/%s", version.Binary, nsq.VERSION)
cfg.MaxInFlight = *maxInFlight
r, err := nsq.NewConsumer(topicName, channelName, cfg)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
r.SetLogger(log.New(os.Stderr, "", log.LstdFlags), nsq.LogLevelInfo)
sr := &StreamReader{
topic: topicName,
channel: channelName,
consumer: r,
req: req,
conn: conn,
bufrw: bufrw, // TODO: latency writer
connectTime: time.Now(),
}
s.Set(sr)
log.Printf("[%s] new connection", conn.RemoteAddr().String())
bufrw.WriteString("HTTP/1.1 200 OK\r\nConnection: close\r\nContent-Type: text/plain; charset=utf-8\r\n\r\n")
bufrw.Flush()
r.AddHandler(sr)
// TODO: handle the error cases better (ie. at all :) )
errors := ConnectToNSQAndLookupd(r, nsqdTCPAddrs, lookupdHTTPAddrs)
log.Printf("connected to NSQ %v", errors)
// this read allows us to detect clients that disconnect
go func(rw *bufio.ReadWriter) {
b, err := rw.ReadByte()
if err != nil {
log.Printf("got connection err %s", err.Error())
} else {
log.Printf("unexpected data on request socket (%c); closing", b)
}
sr.consumer.Stop()
}(bufrw)
go sr.HeartbeatLoop()
}