func publishHandler(w http.ResponseWriter, r *http.Request) {
id, err := sessionHandling(w, r)
if err != nil {
log.Printf("error in session handling (%v)", err)
fmt.Fprintf(w, "Error: %v", err)
return
}
decoder := json.NewDecoder(r.Body)
evt := susigo.Event{}
err = decoder.Decode(&evt)
if err != nil {
log.Printf("error while decoding event from http-publish-request body: %v", err)
w.WriteHeader(400)
w.Write([]byte("malformed payload"))
return
}
if evt.Topic == "" {
log.Printf("error while decoding event from http-publish-request body: %v", "topic empty")
w.WriteHeader(400)
w.Write([]byte("you MUST specify at least a topic for your event"))
return
}
evt.SessionID = id
ready := make(chan bool)
susi.Publish(evt, func(evt *susigo.Event) {
encoder := json.NewEncoder(w)
encoder.Encode(evt)
ready <- true
})
log.Printf("publish event with topic '%v' for session %v via http", evt.Topic, id)
<-ready
}
func main() {
flag.Parse()
s, err := susigo.NewSusi(*susiaddr, *cert, *key)
if err != nil {
log.Printf("Error while creating susi connection: %v", err)
return
}
susi = s
log.Println("successfully create susi connection")
file, err := os.Open(*mappingFile)
if err != nil {
log.Printf("Error while opening the mapping file: %v", err)
return
}
dec := json.NewDecoder(file)
var mapping map[string]map[string]string
err = dec.Decode(&mapping)
if err != nil {
log.Printf("Error while decoding the mapping file: %v", err)
return
}
r := mux.NewRouter()
for endpoint, specifier := range mapping {
var spec = specifier
r.HandleFunc(endpoint, func(w http.ResponseWriter, r *http.Request) {
topic := spec[r.Method]
if _, ok := spec[r.Method]; !ok {
w.WriteHeader(http.StatusNotFound)
return
}
event := susigo.Event{
Topic: topic,
}
payload := make(map[string]interface{})
for key, value := range mux.Vars(r) {
payload[key] = value
}
event.Payload = payload
if r.Method == "POST" || r.Method == "PUT" || r.Method == "PATCH" {
bodyPayload := make(map[string]interface{})
payloadDecoder := json.NewDecoder(r.Body)
err = payloadDecoder.Decode(&bodyPayload)
if err != nil {
w.WriteHeader(http.StatusNotAcceptable)
fmt.Fprintf(w, "Error while parsing body: %v", err)
return
}
for key, value := range bodyPayload {
payload[key] = value
}
event.Payload = payload
}
result := make(chan interface{})
err = susi.Publish(event, func(event *susigo.Event) {
result <- event.Payload
})
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
fmt.Fprintf(w, "Error while publishing event: %v", err)
return
}
resultPayload := <-result
w.Header().Set("Content-Type", "application/json")
enc := json.NewEncoder(w)
enc.Encode(resultPayload)
})
}
http.Handle("/", r)
log.Printf("starting REST server on %v...", *webaddr)
if *useHTTPS {
log.Fatal(http.ListenAndServeTLS(*webaddr, *cert, *key, context.ClearHandler(http.DefaultServeMux)))
} else {
log.Fatal(http.ListenAndServe(*webaddr, context.ClearHandler(http.DefaultServeMux)))
}
}