Implement basic server

secondly.go

@@ -3,6 +3,7 @@ package secondly
 import (
 	"encoding/json"
 	"flag"
+	"fmt"
 	"log"
 	"os"
 	"os/signal"
@@ -37,6 +38,11 @@ func Manage(target interface{}) {
 	bootstrap()
 }
 
+// StartServer will start an HTTP server with web interface to edit config.
+func StartServer(host string, port int) {
+	go startServer(fmt.Sprintf("%s:%d", host, port))
+}
+
 // HandleSIGHUP waits a SIGHUP system call and reloads configuration when
 // receives one.
 func HandleSIGHUP() {

server.go

@@ -0,0 +1,21 @@
+package secondly
+
+import (
+	"encoding/json"
+	"log"
+	"net/http"
+)
+
+func startServer(addr string) {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/fields.json", fieldsHandler)
+
+	log.Println("Starting configuration server on", addr)
+	go http.ListenAndServe(addr, mux)
+}
+
+func fieldsHandler(rw http.ResponseWriter, req *http.Request) {
+	fields := extractFields(config, "")
+	body, _ := json.Marshal(fields)
+	rw.Write(body)
+}