modules/access/htcpcp.c

   1 /*****************************************************************************
   2  * htcpcp.c: HTCPCP module for VLC media player
   3  *****************************************************************************
   4  * Copyright © 2011 Rémi Denis-Courmont
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include "config.h"
  23 #endif
  24
  25 #include <vlc_common.h>
  26 #include <vlc_plugin.h>
  27 #include <vlc_access.h>
  28 #include <vlc_dialog.h>
  29 #include <vlc_network.h>
  30 #include <vlc_url.h>
  31
  32 #define IPPORT_HTCPCP 80
  33
  34 static int Open (vlc_object_t *);
  35 static void Close (vlc_object_t *);
  36
  37 vlc_module_begin ()
  38     set_shortname ("HTCPCP")
  39     set_description (N_("Coffee pot control"))
  40     set_capability ("access", 0)
  41     set_category (CAT_INPUT)
  42     set_subcategory (SUBCAT_INPUT_ACCESS)
  43     add_shortcut ("koffie", "q%C3%A6hv%C3%A6", "%D9%82%D9%87%D9%88%D8%A9",
  44                   "akeita", "koffee", "kahva", "kafe", "caf%C3%E8",
  45                   "%E5%92%96%E5%95%A1", "kava", "k%C3%A1va", "kaffe", "coffee",
  46                   "kafo", "kohv", "kahvi", "%4Baffee"/*,
  47                   "%CE%BA%CE%B1%CF%86%CE%AD",
  48                   "%E0%A4%95%E0%A5%8C%E0%A4%AB%E0%A5%80",
  49                   "%E3%82%B3%E3%83%BC%E3%83%92%E3%83%BC",
  50                   "%EC%BB%A4%ED%94%BC", "%D0%BA%D0%BE%D1%84%D0%B5",
  51                   "%E0%B8%81%E0%B8%B2%E0%B9%81%E0%B8%9F"*/)
  52     set_callbacks (Open, Close)
  53 vlc_module_end ()
  54
  55 static ssize_t Read( access_t *, uint8_t *, size_t );
  56 static int Seek( access_t *, uint64_t );
  57 static int Control( access_t *, int, va_list );
  58
  59 struct access_sys_t
  60 {
  61     int fd;
  62 };
  63
  64 static int Open (vlc_object_t *obj)
  65 {
  66     access_t *access = (access_t *)obj;
  67
  68     vlc_url_t url;
  69     vlc_UrlParse (&url, access->psz_location, 0);
  70
  71     int fd = net_ConnectTCP (obj, url.psz_host,
  72                              url.i_port ? url.i_port : IPPORT_HTCPCP);
  73     if (fd == -1)
  74     {
  75         vlc_UrlClean (&url);
  76         return VLC_EGENERIC;
  77     }
  78
  79     access_sys_t *sys = malloc (sizeof (*sys));
  80     if (unlikely(sys == NULL))
  81         goto error;
  82
  83     sys->fd = fd;
  84     net_Printf (obj, fd, NULL, "BREW %s HTTP/1.1\r\n",
  85                 url.psz_path ? url.psz_path : "/");
  86     if (url.i_port)
  87         net_Printf (obj, fd, NULL, "Host: %s:%u\r\n",
  88                     url.psz_host, url.i_port);
  89     else
  90         net_Printf (obj, fd, NULL, "Host: %s\r\n", url.psz_host);
  91     net_Printf (obj, fd, NULL,
  92                 "User-Agent: "PACKAGE_NAME"/"PACKAGE_VERSION"\r\n"
  93                 "Accept-Additions: \r\n"
  94                 "Content-Type: application/coffee-pot-command\r\n"
  95                 "Content-Length: 0\r\n"
  96                 "\r\n");
  97     vlc_UrlClean (&url);
  98
  99     access->p_sys = sys;
 100     access->pf_read = Read;
 101     access->pf_seek = Seek;
 102     access->pf_control = Control;
 103     return VLC_SUCCESS;
 104
 105 error:
 106     net_Close (fd);
 107     free (sys);
 108     vlc_UrlClean (&url);
 109     return VLC_EGENERIC;
 110 }
 111
 112 static void Close (vlc_object_t *obj)
 113 {
 114     access_t *access = (access_t *)obj;
 115     access_sys_t *sys = access->p_sys;
 116
 117     net_Close (sys->fd);
 118     free (sys);
 119 }
 120
 121 static ssize_t Read (access_t *access, uint8_t *buf, size_t len)
 122 {
 123     access_sys_t *sys = access->p_sys;
 124
 125     char *resp = net_Gets (access, sys->fd, NULL);
 126     if (resp == NULL)
 127         goto error;
 128
 129     unsigned code;
 130     if (sscanf (resp, "HTTP/%*u.%*u %u", &code) != 1)
 131     {
 132         msg_Err (access, "cannot parse response from coffee server");
 133         goto error;
 134     }
 135     if ((code / 100) != 2)
 136     {
 137         msg_Err (access, "server error %u", code);
 138         if (code == 418)
 139             dialog_FatalWait (access, N_("Teapot"), "%s",
 140                 N_("The server is a teapot. You can't brew coffee with "
 141                    "a teapot."));
 142         else
 143             dialog_FatalWait (access, N_("Coffee pot"),
 144                 N_("The pot failed to brew coffee (server error %u)."), code);
 145         goto error;
 146     }
 147
 148     (void) buf; (void) len;
 149     dialog_FatalWait (access, N_("Coffee pot"), N_("Coffee is ready."));
 150 error:
 151     access->info.b_eof = true;
 152     return 0;
 153 }
 154
 155 static int Seek (access_t *access, uint64_t pos)
 156 {
 157     (void) access; (void) pos;
 158     return VLC_EGENERIC;
 159 }
 160
 161 static int Control (access_t *access, int query, va_list args)
 162 {
 163     (void) access;
 164
 165     switch (query)
 166     {
 167         case ACCESS_CAN_SEEK:
 168         case ACCESS_CAN_FASTSEEK:
 169         case ACCESS_CAN_PAUSE:
 170         case ACCESS_CAN_CONTROL_PACE:
 171             *va_arg (args, bool *) = false;
 172             break;
 173
 174         case ACCESS_GET_PTS_DELAY:
 175             *va_arg (args, int64_t *) = DEFAULT_PTS_DELAY * INT64_C(1000);
 176             break;
 177
 178         default:
 179             return VLC_EGENERIC;
 180
 181     }
 182     return VLC_SUCCESS;
 183 }