src/fs/gnunet-download.c

   1 /*
   2      This file is part of GNUnet.
   3      (C) 2001, 2002, 2004, 2005, 2006, 2007, 2009 Christian Grothoff (and other contributing authors)
   4
   5      GNUnet is free software; you can redistribute it and/or modify
   6      it under the terms of the GNU General Public License as published
   7      by the Free Software Foundation; either version 3, or (at your
   8      option) any later version.
   9
  10      GNUnet is distributed in the hope that it will be useful, but
  11      WITHOUT ANY WARRANTY; without even the implied warranty of
  12      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13      General Public License for more details.
  14
  15      You should have received a copy of the GNU General Public License
  16      along with GNUnet; see the file COPYING.  If not, write to the
  17      Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18      Boston, MA 02111-1307, USA.
  19 */
  20 /**
  21  * @file fs/gnunet-download.c
  22  * @brief downloading for files on GNUnet
  23  * @author Christian Grothoff
  24  * @author Krista Bennett
  25  * @author James Blackwell
  26  * @author Igor Wronsky
  27  */
  28 #include "platform.h"
  29 #include "gnunet_fs_service.h"
  30
  31 static int ret;
  32
  33 static int verbose;
  34
  35 static int delete_incomplete;
  36
  37 static const struct GNUNET_CONFIGURATION_Handle *cfg;
  38
  39 static struct GNUNET_FS_Handle *ctx;
  40
  41 static struct GNUNET_FS_DownloadContext *dc;
  42
  43 static unsigned int anonymity = 1;
  44
  45 static unsigned int parallelism = 16;
  46
  47 static unsigned int request_parallelism = 4092;
  48
  49 static int do_recursive;
  50
  51 static char *filename;
  52
  53 static int local_only;
  54
  55 static void
  56 cleanup_task (void *cls,
  57               const struct GNUNET_SCHEDULER_TaskContext *tc)
  58 {
  59   GNUNET_FS_stop (ctx);
  60   ctx = NULL;
  61 }
  62
  63
  64 static void
  65 shutdown_task (void *cls,
  66               const struct GNUNET_SCHEDULER_TaskContext *tc)
  67 {
  68   struct GNUNET_FS_DownloadContext *d;
  69
  70   if (dc != NULL)
  71     {
  72       d = dc;
  73       dc = NULL;
  74       GNUNET_FS_download_stop (d, delete_incomplete);
  75     }
  76 }
  77
  78
  79 /**
  80  * Called by FS client to give information about the progress of an
  81  * operation.
  82  *
  83  * @param cls closure
  84  * @param info details about the event, specifying the event type
  85  *        and various bits about the event
  86  * @return client-context (for the next progress call
  87  *         for this operation; should be set to NULL for
  88  *         SUSPEND and STOPPED events).  The value returned
  89  *         will be passed to future callbacks in the respective
  90  *         field in the GNUNET_FS_ProgressInfo struct.
  91  */
  92 static void *
  93 progress_cb (void *cls,
  94              const struct GNUNET_FS_ProgressInfo *info)
  95 {
  96   char *s;
  97   char *t;
  98
  99   switch (info->status)
 100     {
 101     case GNUNET_FS_STATUS_DOWNLOAD_START:
 102       if (verbose > 1)
 103         fprintf (stderr,
 104                  _("Starting download `%s'.\n"),
 105                  info->value.download.filename);
 106       break;
 107     case GNUNET_FS_STATUS_DOWNLOAD_PROGRESS:
 108       if (verbose)
 109         {
 110           s = GNUNET_STRINGS_relative_time_to_string(info->value.download.eta);
 111           t = GNUNET_STRINGS_byte_size_fancy(info->value.download.completed * 1000LL / (info->value.download.duration.rel_value + 1));
 112           fprintf (stdout,
 113                    _("Downloading `%s' at %llu/%llu (%s remaining, %s/s)\n"),
 114                    info->value.download.filename,
 115                    (unsigned long long) info->value.download.completed,
 116                    (unsigned long long) info->value.download.size,
 117                    s,
 118                    t);
 119           GNUNET_free (s);
 120           GNUNET_free (t);
 121         }
 122       break;
 123     case GNUNET_FS_STATUS_DOWNLOAD_ERROR:
 124       fprintf (stderr,
 125                _("Error downloading: %s.\n"),
 126                info->value.download.specifics.error.message);
 127       GNUNET_SCHEDULER_shutdown ();
 128       break;
 129     case GNUNET_FS_STATUS_DOWNLOAD_COMPLETED:
 130       s = GNUNET_STRINGS_byte_size_fancy(info->value.download.completed * 1000 / (info->value.download.duration.rel_value + 1));
 131       fprintf (stdout,
 132                _("Downloading `%s' done (%s/s).\n"),
 133                info->value.download.filename,
 134                s);
 135       GNUNET_free (s);
 136       if (info->value.download.dc == dc)
 137         GNUNET_SCHEDULER_shutdown ();
 138       break;
 139     case GNUNET_FS_STATUS_DOWNLOAD_STOPPED:
 140       if (info->value.download.dc == dc)
 141         GNUNET_SCHEDULER_add_continuation (&cleanup_task,
 142                                            NULL,
 143                                            GNUNET_SCHEDULER_REASON_PREREQ_DONE);
 144       break;
 145     case GNUNET_FS_STATUS_DOWNLOAD_ACTIVE:
 146     case GNUNET_FS_STATUS_DOWNLOAD_INACTIVE:
 147       break;
 148     default:
 149       fprintf (stderr,
 150                _("Unexpected status: %d\n"),
 151                info->status);
 152       break;
 153     }
 154   return NULL;
 155 }
 156
 157
 158 /**
 159  * Main function that will be run by the scheduler.
 160  *
 161  * @param cls closure
 162  * @param args remaining command-line arguments
 163  * @param cfgfile name of the configuration file used (for saving, can be NULL!)
 164  * @param c configuration
 165  */
 166 static void
 167 run (void *cls,
 168      char *const *args,
 169      const char *cfgfile,
 170      const struct GNUNET_CONFIGURATION_Handle *c)
 171 {
 172   struct GNUNET_FS_Uri *uri;
 173   char *emsg;
 174   enum GNUNET_FS_DownloadOptions options;
 175
 176   uri = GNUNET_FS_uri_parse (args[0],
 177                              &emsg);
 178   if (NULL == uri)
 179     {
 180       fprintf (stderr,
 181                _("Failed to parse URI: %s\n"),
 182                emsg);
 183       GNUNET_free (emsg);
 184       ret = 1;
 185       return;
 186     }
 187   if ( (! GNUNET_FS_uri_test_chk (uri)) &&
 188        (! GNUNET_FS_uri_test_loc (uri)) )
 189     {
 190       fprintf (stderr,
 191                _("Only CHK or LOC URIs supported.\n"));
 192       ret = 1;
 193       GNUNET_FS_uri_destroy (uri);
 194       return;
 195     }
 196   if (NULL == filename)
 197     {
 198       fprintf (stderr,
 199                _("Target filename must be specified.\n"));
 200       ret = 1;
 201       GNUNET_FS_uri_destroy (uri);
 202       return;
 203     }
 204   cfg = c;
 205   ctx = GNUNET_FS_start (cfg,
 206                          "gnunet-download",
 207                          &progress_cb,
 208                          NULL,
 209                          GNUNET_FS_FLAGS_NONE,
 210                          GNUNET_FS_OPTIONS_DOWNLOAD_PARALLELISM,
 211                          parallelism,
 212                          GNUNET_FS_OPTIONS_REQUEST_PARALLELISM,
 213                          request_parallelism,
 214                          GNUNET_FS_OPTIONS_END);
 215   if (NULL == ctx)
 216     {
 217       fprintf (stderr,
 218                _("Could not initialize `%s' subsystem.\n"),
 219                "FS");
 220       GNUNET_FS_uri_destroy (uri);
 221       ret = 1;
 222       return;
 223     }
 224   options = GNUNET_FS_DOWNLOAD_OPTION_NONE;
 225   if (do_recursive)
 226     options |= GNUNET_FS_DOWNLOAD_OPTION_RECURSIVE;
 227   if (local_only)
 228     options |= GNUNET_FS_DOWNLOAD_OPTION_LOOPBACK_ONLY;
 229   dc = GNUNET_FS_download_start (ctx,
 230                                  uri,
 231                                  NULL,
 232                                  filename, NULL,
 233                                  0,
 234                                  GNUNET_FS_uri_chk_get_file_size (uri),
 235                                  anonymity,
 236                                  options,
 237                                  NULL,
 238                                  NULL);
 239   GNUNET_FS_uri_destroy (uri);
 240   if (dc == NULL)
 241     {
 242       GNUNET_FS_stop (ctx);
 243       ctx = NULL;
 244       return;
 245     }
 246   GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
 247                                 &shutdown_task,
 248                                 NULL);
 249 }
 250
 251
 252 /**
 253  * The main function to download GNUnet.
 254  *
 255  * @param argc number of arguments from the command line
 256  * @param argv command line arguments
 257  * @return 0 ok, 1 on error
 258  */
 259 int
 260 main (int argc, char *const *argv)
 261 {
 262   static const struct GNUNET_GETOPT_CommandLineOption options[] = {
 263     {'a', "anonymity", "LEVEL",
 264      gettext_noop ("set the desired LEVEL of receiver-anonymity"),
 265      1, &GNUNET_GETOPT_set_uint, &anonymity},
 266     {'D', "delete-incomplete", NULL,
 267      gettext_noop ("delete incomplete downloads (when aborted with CTRL-C)"),
 268      0, &GNUNET_GETOPT_set_one, &delete_incomplete},
 269     {'n', "no-network", NULL,
 270      gettext_noop ("only search the local peer (no P2P network search)"),
 271      1, &GNUNET_GETOPT_set_uint, &local_only},
 272     {'o', "output", "FILENAME",
 273      gettext_noop ("write the file to FILENAME"),
 274      1, &GNUNET_GETOPT_set_string, &filename},
 275     {'p', "parallelism", "DOWNLOADS",
 276      gettext_noop
 277      ("set the maximum number of parallel downloads that is allowed"),
 278      1, &GNUNET_GETOPT_set_uint, &parallelism},
 279     {'r', "request-parallelism", "REQUESTS",
 280      gettext_noop
 281      ("set the maximum number of parallel requests for blocks that is allowed"),
 282      1, &GNUNET_GETOPT_set_uint, &request_parallelism},
 283     {'R', "recursive", NULL,
 284      gettext_noop ("download a GNUnet directory recursively"),
 285      0, &GNUNET_GETOPT_set_one, &do_recursive},
 286     {'V', "verbose", NULL,
 287      gettext_noop ("be verbose (print progress information)"),
 288      0, &GNUNET_GETOPT_increment_value, &verbose},
 289     GNUNET_GETOPT_OPTION_END
 290   };
 291   return (GNUNET_OK ==
 292           GNUNET_PROGRAM_run (argc,
 293                               argv,
 294                               "gnunet-download",
 295                               gettext_noop
 296                               ("Download files from GNUnet."),
 297                               options, &run, NULL)) ? ret : 1;
 298 }
 299
 300 /* end of gnunet-download.c */
 301