100 lines
2.0 KiB
Go
100 lines
2.0 KiB
Go
package main
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import (
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"encoding/json"
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"io/ioutil"
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"net/http"
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"runtime"
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"strings"
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)
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func StatusHandler(w http.ResponseWriter, r *http.Request) {
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info := make(map[string]map[string]uint)
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for _, q := range queues {
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info[q.Name] = map[string]uint{
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"messages": q.Counter.Distance(),
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"subscriptions": 0,
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}
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}
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for _, r := range pool.Requests {
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for _, q := range r.Queues {
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info[q]["subscriptions"]++
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}
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}
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infoJson, _ := json.Marshal(info)
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w.Write(infoJson)
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}
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func DebugHandler(w http.ResponseWriter, r *http.Request) {
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info := make(map[string]int)
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info["goroutines"] = runtime.NumGoroutine()
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infoJson, _ := json.Marshal(info)
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w.Write(infoJson)
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}
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func PublishHandler(w http.ResponseWriter, r *http.Request) {
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defer r.Body.Close()
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msg, _ := ioutil.ReadAll(r.Body)
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if len(msg) == 0 {
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msg = Message(r.FormValue("msg"))
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}
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queueName := r.FormValue("queue")
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ok := RegisterPublication(queueName, msg)
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if ok {
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Debug("Published message of %d bytes to queue %s", len(msg), queueName)
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w.Write([]byte("OK"))
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} else {
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Debug("Failed to publish message of %d bytes to queue %s", len(msg), queueName)
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http.Error(w, "FAIL", 500)
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}
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}
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func SubscriptionHandler(w http.ResponseWriter, r *http.Request) {
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rch := make(chan *Response)
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abort := make(chan bool, 1)
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req := &Request{
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Queues: strings.Split(r.FormValue("queues"), ","),
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Callback: func(r *Response) {
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rch <- r
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},
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Abort: abort,
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}
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go RegisterSubscription(req)
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disconnected := w.(http.CloseNotifier).CloseNotify()
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finished := make(chan bool)
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go func() {
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select {
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case <-disconnected:
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rch <- nil
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abort <- true
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req.Purge()
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case <-finished:
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}
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}()
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res := <-rch
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if res == nil {
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return
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}
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w.Header().Set("Queue", res.Queue)
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w.Write(res.Message)
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Debug("Recieved message of %d bytes from queue %s", len(res.Message), res.Queue)
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finished <- true
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}
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func SetupServer() {
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http.HandleFunc("/status", StatusHandler)
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http.HandleFunc("/debug", DebugHandler)
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http.HandleFunc("/publish", PublishHandler)
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http.HandleFunc("/subscribe", SubscriptionHandler)
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}
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