src/server.go

   1 package server
   2
   3 import (
   4   "fmt"
   5   "http"
   6   "io"
   7   "json"
   8   "os"
   9   "path"
  10 )
  11
  12 const kFrontEndFiles = "/Users/rsesek/Projects/armadillo/out/fe/"
  13
  14 func indexHandler(connection *http.Conn, request *http.Request) {
  15   fd, err := os.Open(path.Join(kFrontEndFiles, "index.html"), os.O_RDONLY, 0)
  16   if err != nil {
  17     fmt.Print("Error opening file ", err.String(), "\n")
  18     return
  19   }
  20   io.Copy(connection, fd)
  21 }
  22
  23 func serviceHandler(connection *http.Conn, request *http.Request) {
  24   if request.Method != "POST" {
  25     io.WriteString(connection, "Error: Not a POST request")
  26     return
  27   }
  28
  29   switch request.FormValue("action") {
  30     case "list":
  31       okResponse(connection, "Request received")
  32       return
  33   }
  34
  35   errorResponse(connection, "Unhandled action")
  36 }
  37
  38 func errorResponse(connection *http.Conn, message string) {
  39   response := map[string] string {
  40     "error": "-1",
  41     "message": message,
  42   }
  43   json_data, err := json.Marshal(response)
  44
  45   connection.SetHeader("Content-Type", "text/json")
  46   if err != nil {
  47     io.WriteString(connection, "{\"error\":\"-9\",\"message\":\"Internal encoding error\"}")
  48   } else {
  49     connection.Write(json_data)
  50   }
  51 }
  52
  53 func okResponse(connection *http.Conn, data interface{}) {
  54   connection.SetHeader("Content-Type", "text/json")
  55   json_data, err := json.Marshal(data)
  56   if err != nil {
  57     errorResponse(connection, "Internal encoding error")
  58   } else {
  59     connection.Write(json_data)
  60   }
  61 }
  62
  63 func RunFrontEnd() {
  64   mux := http.NewServeMux()
  65   mux.HandleFunc("/", indexHandler)
  66   mux.Handle("/fe/", http.FileServer(kFrontEndFiles, "/fe/"))
  67   mux.HandleFunc("/service", serviceHandler)
  68
  69   error := http.ListenAndServe(":8084", mux)
  70   fmt.Printf("error %v", error)
  71 }