func pauseChannelHandler(w http.ResponseWriter, req *http.Request) {
if req.Method != "POST" {
log.Printf("ERROR: invalid %s to POST only method", req.Method)
http.Error(w, "INVALID_REQUEST", 500)
return
}
reqParams := &util.PostParams{req}
topicName, channelName, err := util.GetTopicChannelArgs(reqParams)
if err != nil {
http.Error(w, err.Error(), 500)
return
}
producers := getProducers(topicName)
for _, addr := range producers {
endpoint := fmt.Sprintf("http://%s%s?topic=%s&channel=%s",
addr, req.URL.Path, url.QueryEscape(topicName), url.QueryEscape(channelName))
log.Printf("NSQD: calling %s", endpoint)
_, err := util.ApiRequest(endpoint)
if err != nil {
log.Printf("ERROR: nsqd %s - %s", endpoint, err.Error())
continue
}
}
NotifyAdminAction(strings.TrimLeft(req.URL.Path, "/"), topicName, channelName, "", req)
http.Redirect(w, req, fmt.Sprintf("/topic/%s/%s", url.QueryEscape(topicName), url.QueryEscape(channelName)), 302)
}
func (s *httpServer) deleteChannelHandler(w http.ResponseWriter, req *http.Request) {
reqParams, err := util.NewReqParams(req)
if err != nil {
util.ApiResponse(w, 500, "INVALID_REQUEST", nil)
return
}
topicName, channelName, err := util.GetTopicChannelArgs(reqParams)
if err != nil {
util.ApiResponse(w, 500, err.Error(), nil)
return
}
registrations := s.context.nsqlookupd.DB.FindRegistrations("channel", topicName, channelName)
if len(registrations) == 0 {
util.ApiResponse(w, 404, "NOT_FOUND", nil)
return
}
log.Printf("DB: removing channel(%s) from topic(%s)", channelName, topicName)
for _, registration := range registrations {
s.context.nsqlookupd.DB.RemoveRegistration(registration)
}
util.ApiResponse(w, 200, "OK", nil)
}
func (s *httpServer) deleteChannelHandler(w http.ResponseWriter, req *http.Request) {
reqParams, err := util.NewReqParams(req)
if err != nil {
log.Printf("ERROR: failed to parse request params - %s", err.Error())
util.ApiResponse(w, 500, "INVALID_REQUEST", nil)
return
}
topicName, channelName, err := util.GetTopicChannelArgs(reqParams)
if err != nil {
util.ApiResponse(w, 500, err.Error(), nil)
return
}
topic, err := s.context.nsqd.GetExistingTopic(topicName)
if err != nil {
util.ApiResponse(w, 500, "INVALID_TOPIC", nil)
return
}
err = topic.DeleteExistingChannel(channelName)
if err != nil {
util.ApiResponse(w, 500, "INVALID_CHANNEL", nil)
return
}
util.ApiResponse(w, 200, "OK", nil)
}
func deleteChannelHandler(w http.ResponseWriter, req *http.Request) {
if req.Method != "POST" {
log.Printf("ERROR: invalid %s to POST only method", req.Method)
http.Error(w, "INVALID_REQUEST", 500)
return
}
reqParams := &util.PostParams{req}
topicName, channelName, err := util.GetTopicChannelArgs(reqParams)
if err != nil {
http.Error(w, err.Error(), 500)
return
}
rd, _ := reqParams.Get("rd")
if !strings.HasPrefix(rd, "/") {
rd = fmt.Sprintf("/topic/%s", url.QueryEscape(topicName))
}
for _, addr := range lookupdHTTPAddrs {
endpoint := fmt.Sprintf("http://%s/delete_channel?topic=%s&channel=%s",
addr, url.QueryEscape(topicName), url.QueryEscape(channelName))
log.Printf("LOOKUPD: querying %s", endpoint)
_, err := util.ApiRequest(endpoint)
if err != nil {
log.Printf("ERROR: lookupd %s - %s", endpoint, err.Error())
continue
}
}
producers := getProducers(topicName)
for _, addr := range producers {
endpoint := fmt.Sprintf("http://%s/delete_channel?topic=%s&channel=%s",
addr, url.QueryEscape(topicName), url.QueryEscape(channelName))
log.Printf("NSQD: querying %s", endpoint)
_, err := util.ApiRequest(endpoint)
if err != nil {
log.Printf("ERROR: nsqd %s - %s", endpoint, err.Error())
continue
}
}
NotifyAdminAction("delete_channel", topicName, channelName, "", req)
http.Redirect(w, req, rd, 302)
}
func (s *httpServer) createChannelHandler(w http.ResponseWriter, req *http.Request) {
reqParams, err := util.NewReqParams(req)
if err != nil {
util.ApiResponse(w, 500, "INVALID_REQUEST", nil)
return
}
topicName, channelName, err := util.GetTopicChannelArgs(reqParams)
if err != nil {
util.ApiResponse(w, 500, err.Error(), nil)
return
}
log.Printf("DB: adding channel(%s) in topic(%s)", channelName, topicName)
key := Registration{"channel", topicName, channelName}
s.context.nsqlookupd.DB.AddRegistration(key)
log.Printf("DB: adding topic(%s)", topicName)
key = Registration{"topic", topicName, ""}
s.context.nsqlookupd.DB.AddRegistration(key)
util.ApiResponse(w, 200, "OK", nil)
}
func (s *httpServer) pauseChannelHandler(w http.ResponseWriter, req *http.Request) {
reqParams, err := util.NewReqParams(req)
if err != nil {
log.Printf("ERROR: failed to parse request params - %s", err.Error())
util.ApiResponse(w, 500, "INVALID_REQUEST", nil)
return
}
topicName, channelName, err := util.GetTopicChannelArgs(reqParams)
if err != nil {
util.ApiResponse(w, 500, err.Error(), nil)
return
}
topic, err := s.context.nsqd.GetExistingTopic(topicName)
if err != nil {
util.ApiResponse(w, 500, "INVALID_TOPIC", nil)
return
}
channel, err := topic.GetExistingChannel(channelName)
if err != nil {
util.ApiResponse(w, 500, "INVALID_CHANNEL", nil)
return
}
if strings.HasPrefix(req.URL.Path, "/pause") {
err = channel.Pause()
} else {
err = channel.UnPause()
}
if err != nil {
log.Printf("ERROR: failure in %s - %s", req.URL.Path, err.Error())
}
util.ApiResponse(w, 200, "OK", 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 := util.NewReqParams(req)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
topicName, channelName, err := util.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
}
r, err := nsq.NewReader(topicName, channelName, *authenticationPassword)
r.SetMaxInFlight(*maxInFlight)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
sr := &StreamReader{
topic: topicName,
channel: channelName,
reader: 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 (%s); closing", b)
}
sr.reader.Stop()
}(bufrw)
go sr.HeartbeatLoop()
}