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observer.go
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observer.go
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package observerip
import (
"context"
"encoding/json"
"fmt"
"net/http"
)
/*
USAGE:
x := observerip.New(5080)
x.SetPassthrough(true)
x.ListenAndServe()
*/
// Since our router is just forwarding all port 80 requests from ObserverIP to
// us, we don't know where to send the data if passthrough is turned on.
// This is the URL that we prepend the response URI with.
var WU_URL string = "http://rtupdate.wunderground.com"
var WU_PASSTHROUGH bool = false
// ObserverIP Handler
type ObHandler struct {
stationResponse StationResponse
endpointResponse EndpointResponse
server *http.Server
port int
ctx context.Context
}
// This one just calls ListenAndServe (does not return)
func (me *ObHandler) ListenAndServe() {
me.server.ListenAndServe()
}
// This starts the listenAndServe, and returns
func (me *ObHandler) Start() {
go me.server.ListenAndServe()
}
func (me *ObHandler) SetPassthrough(b bool) {
WU_PASSTHROUGH = b
}
func (me *ObHandler) SetPassthroughURL(u string) {
WU_URL = u
}
func (me *ObHandler) Close() {
me.server.Close()
}
func (me *ObHandler) GetStationResponse() StationResponse {
return me.stationResponse
}
func (me *ObHandler) GetEndpointResponse() EndpointResponse {
return me.endpointResponse
}
func New(port int) (*ObHandler, error) {
ctx := context.Background()
return NewWithContext(port, ctx)
}
func NewWithContext(port int, ctx context.Context) (*ObHandler, error) {
h := ObHandler{
port: port,
ctx: ctx,
}
mux := http.NewServeMux()
h.server = &http.Server{Addr: fmt.Sprintf(":%d", port), Handler: mux}
// Actual Weather Underground Endpoints SENT by ObserverIP
mux.HandleFunc("/weatherstation/updateweatherstation.php", h.stationResponse.Parse)
mux.HandleFunc("/endpoint", h.endpointResponse.Parse)
// Our Endpoints for polling stored data
mux.HandleFunc("/endpoints", h.GetEndpoints)
mux.HandleFunc("/info", h.GetInfo)
return &h, nil
}
func (me *ObHandler) GetEndpoints(w http.ResponseWriter, r *http.Request) {
json.NewEncoder(w).Encode(me.endpointResponse)
}
func (me *ObHandler) GetInfo(w http.ResponseWriter, r *http.Request) {
json.NewEncoder(w).Encode(me.stationResponse)
}