src/server.go

   1 //
   2 // Armadillo File Manager
   3 // Copyright (c) 2010, Robert Sesek <http://www.bluestatic.org>
   4 //
   5 // This program is free software: you can redistribute it and/or modify it under
   6 // the terms of the GNU General Public License as published by the Free Software
   7 // Foundation, either version 3 of the License, or any later version.
   8 //
   9
  10 package server
  11
  12 import (
  13   "fmt"
  14   "http"
  15   "io"
  16   "json"
  17   "os"
  18   "path"
  19   "./paths"
  20 )
  21
  22 var dir, file = path.Split(path.Clean(os.Getenv("_")))
  23 var kFrontEndFiles string = path.Join(dir, "fe")
  24
  25 func indexHandler(connection *http.Conn, request *http.Request) {
  26   fd, err := os.Open(path.Join(kFrontEndFiles, "index.html"), os.O_RDONLY, 0)
  27   if err != nil {
  28     fmt.Print("Error opening file ", err.String(), "\n")
  29     return
  30   }
  31   io.Copy(connection, fd)
  32 }
  33
  34 func serviceHandler(connection *http.Conn, request *http.Request) {
  35   if request.Method != "POST" {
  36     io.WriteString(connection, "Error: Not a POST request")
  37     return
  38   }
  39
  40   switch request.FormValue("action") {
  41     case "list":
  42       files, err := paths.List(request.FormValue("path"))
  43       if err != nil {
  44         errorResponse(connection, err.String())
  45       } else {
  46         okResponse(connection, files)
  47       }
  48     default:
  49       errorResponse(connection, "Unhandled action")
  50   }
  51 }
  52
  53 func errorResponse(connection *http.Conn, message string) {
  54   response := map[string] string {
  55     "error": "-1",
  56     "message": message,
  57   }
  58   json_data, err := json.Marshal(response)
  59
  60   connection.SetHeader("Content-Type", "text/json")
  61   if err != nil {
  62     io.WriteString(connection, "{\"error\":\"-9\",\"message\":\"Internal encoding error\"}")
  63   } else {
  64     connection.Write(json_data)
  65   }
  66 }
  67
  68 func okResponse(connection *http.Conn, data interface{}) {
  69   connection.SetHeader("Content-Type", "text/json")
  70   json_data, err := json.Marshal(data)
  71   if err != nil {
  72     errorResponse(connection, "Internal encoding error")
  73   } else {
  74     connection.Write(json_data)
  75   }
  76 }
  77
  78 func RunFrontEnd() {
  79   mux := http.NewServeMux()
  80   mux.HandleFunc("/", indexHandler)
  81   mux.Handle("/fe/", http.FileServer(kFrontEndFiles, "/fe/"))
  82   mux.HandleFunc("/service", serviceHandler)
  83
  84   error := http.ListenAndServe(":8084", mux)
  85   fmt.Printf("error %v", error)
  86 }