src/server.go

   1 package server
   2
   3 import (
   4   "fmt"
   5   "http"
   6   "io"
   7   "json"
   8   "os"
   9   "path"
  10   "./paths"
  11 )
  12
  13 const kFrontEndFiles = "/Users/rsesek/Projects/armadillo/out/fe/"
  14
  15 func indexHandler(connection *http.Conn, request *http.Request) {
  16   fd, err := os.Open(path.Join(kFrontEndFiles, "index.html"), os.O_RDONLY, 0)
  17   if err != nil {
  18     fmt.Print("Error opening file ", err.String(), "\n")
  19     return
  20   }
  21   io.Copy(connection, fd)
  22 }
  23
  24 func serviceHandler(connection *http.Conn, request *http.Request) {
  25   if request.Method != "POST" {
  26     io.WriteString(connection, "Error: Not a POST request")
  27     return
  28   }
  29
  30   switch request.FormValue("action") {
  31     case "list":
  32       files, err := paths.List("./")
  33       if err != nil {
  34         errorResponse(connection, err.String())
  35       } else {
  36         okResponse(connection, files)
  37       }
  38       return
  39   }
  40
  41   errorResponse(connection, "Unhandled action")
  42 }
  43
  44 func errorResponse(connection *http.Conn, message string) {
  45   response := map[string] string {
  46     "error": "-1",
  47     "message": message,
  48   }
  49   json_data, err := json.Marshal(response)
  50
  51   connection.SetHeader("Content-Type", "text/json")
  52   if err != nil {
  53     io.WriteString(connection, "{\"error\":\"-9\",\"message\":\"Internal encoding error\"}")
  54   } else {
  55     connection.Write(json_data)
  56   }
  57 }
  58
  59 func okResponse(connection *http.Conn, data interface{}) {
  60   connection.SetHeader("Content-Type", "text/json")
  61   json_data, err := json.Marshal(data)
  62   if err != nil {
  63     errorResponse(connection, "Internal encoding error")
  64   } else {
  65     connection.Write(json_data)
  66   }
  67 }
  68
  69 func RunFrontEnd() {
  70   mux := http.NewServeMux()
  71   mux.HandleFunc("/", indexHandler)
  72   mux.Handle("/fe/", http.FileServer(kFrontEndFiles, "/fe/"))
  73   mux.HandleFunc("/service", serviceHandler)
  74
  75   error := http.ListenAndServe(":8084", mux)
  76   fmt.Printf("error %v", error)
  77 }