func broadcastChannelOp(op string, req *http.Request) (err error) {
reqParams, err := http_api.NewReqParams(req)
if err != nil {
return
}
topicName, channelName, err := http_api.GetTopicChannelArgs(reqParams)
if err != nil {
return
}
for _, addr := range getAllProducersHttpAddr(topicName) {
req_url := fmt.Sprintf("%s%s?topic=%s&channel=%s", addr, op, topicName, channelName)
resp, err := http.PostForm(req_url, url.Values{})
if err != nil {
log.Printf("request nsqd fail %s %s", req_url, err.Error())
return err
}
defer resp.Body.Close()
respBody, err := ioutil.ReadAll(resp.Body)
log.Printf("request nsqd %s [%s] %v", req_url, string(respBody), err)
}
return nil
}
func SubHandler(w http.ResponseWriter, req *http.Request) {
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_httpsub go-nsq/%s", 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(),
}
streamServer.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, lookupdHTTPAddrs)
log.Printf("connected to NSQ %v", errors)
if *timeout > 0 {
go func(sr *StreamReader) {
timer := time.AfterFunc(time.Duration(*timeout)*time.Second, func() {
log.Printf("timeout after %d seconds", *timeout)
sr.consumer.Stop()
})
for {
select {
case <-sr.consumer.StopChan:
timer.Stop()
return
}
}
}(sr)
}
go sr.HeartbeatLoop()
// this read allows us to detect clients that disconnect
go func(rw *bufio.ReadWriter) {
b, err := rw.ReadByte()
if err != nil {
log.Printf("disconnect client %s", err.Error())
} else {
log.Printf("unexpected data on request socket (%c); closing", b)
}
sr.consumer.Stop()
}(bufrw)
}