Imported Upstream version 0.9.2upstream/0.9.2

1 files changed, 281 insertions, 0 deletions

diff --git a/src/fs/gnunet-download.c b/src/fs/gnunet-download.c
new file mode 100644
index 0000000..ff10c39
--- /dev/null
+++ b/src/fs/gnunet-download.c
@@ -0,0 +1,281 @@
+/*
+     This file is part of GNUnet.
+     (C) 2001, 2002, 2004, 2005, 2006, 2007, 2009 Christian Grothoff (and other contributing authors)
+
+     GNUnet is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 3, or (at your
+     option) any later version.
+
+     GNUnet is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+*/
+/**
+ * @file fs/gnunet-download.c
+ * @brief downloading for files on GNUnet
+ * @author Christian Grothoff
+ * @author Krista Bennett
+ * @author James Blackwell
+ * @author Igor Wronsky
+ */
+#include "platform.h"
+#include "gnunet_fs_service.h"
+
+static int ret;
+
+static int verbose;
+
+static int delete_incomplete;
+
+static const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+static struct GNUNET_FS_Handle *ctx;
+
+static struct GNUNET_FS_DownloadContext *dc;
+
+static unsigned int anonymity = 1;
+
+static unsigned int parallelism = 16;
+
+static unsigned int request_parallelism = 4092;
+
+static int do_recursive;
+
+static char *filename;
+
+static int local_only;
+
+static void
+cleanup_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+  GNUNET_FS_stop (ctx);
+  ctx = NULL;
+}
+
+
+static void
+shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+  struct GNUNET_FS_DownloadContext *d;
+
+  if (dc != NULL)
+  {
+    d = dc;
+    dc = NULL;
+    GNUNET_FS_download_stop (d, delete_incomplete);
+  }
+}
+
+
+/**
+ * Called by FS client to give information about the progress of an
+ * operation.
+ *
+ * @param cls closure
+ * @param info details about the event, specifying the event type
+ *        and various bits about the event
+ * @return client-context (for the next progress call
+ *         for this operation; should be set to NULL for
+ *         SUSPEND and STOPPED events).  The value returned
+ *         will be passed to future callbacks in the respective
+ *         field in the GNUNET_FS_ProgressInfo struct.
+ */
+static void *
+progress_cb (void *cls, const struct GNUNET_FS_ProgressInfo *info)
+{
+  char *s, *s2;
+  char *t;
+
+  switch (info->status)
+  {
+  case GNUNET_FS_STATUS_DOWNLOAD_START:
+    if (verbose > 1)
+      FPRINTF (stderr, _("Starting download `%s'.\n"),
+               info->value.download.filename);
+    break;
+  case GNUNET_FS_STATUS_DOWNLOAD_PROGRESS:
+    if (verbose)
+    {
+      s = GNUNET_STRINGS_relative_time_to_string (info->value.download.eta);
+      if (info->value.download.specifics.progress.block_download_duration.rel_value 
+          == GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
+        s2 = GNUNET_strdup (_("<unknown time>"));
+      else
+        s2 = GNUNET_STRINGS_relative_time_to_string (
+              info->value.download.specifics.progress.block_download_duration);
+      t = GNUNET_STRINGS_byte_size_fancy (info->value.download.completed *
+                                          1000LL /
+                                          (info->value.download.
+                                           duration.rel_value + 1));
+      FPRINTF (stdout,
+               _("Downloading `%s' at %llu/%llu (%s remaining, %s/s). Block took %s to download\n"),
+               info->value.download.filename,
+               (unsigned long long) info->value.download.completed,
+               (unsigned long long) info->value.download.size, s, t, s2);
+      GNUNET_free (s);
+      GNUNET_free (s2);
+      GNUNET_free (t);
+    }
+    break;
+  case GNUNET_FS_STATUS_DOWNLOAD_ERROR:
+    FPRINTF (stderr, _("Error downloading: %s.\n"),
+             info->value.download.specifics.error.message);
+    GNUNET_SCHEDULER_shutdown ();
+    break;
+  case GNUNET_FS_STATUS_DOWNLOAD_COMPLETED:
+    s = GNUNET_STRINGS_byte_size_fancy (info->value.download.completed * 1000 /
+                                        (info->value.download.
+                                         duration.rel_value + 1));
+    FPRINTF (stdout, _("Downloading `%s' done (%s/s).\n"),
+             info->value.download.filename, s);
+    GNUNET_free (s);
+    if (info->value.download.dc == dc)
+      GNUNET_SCHEDULER_shutdown ();
+    break;
+  case GNUNET_FS_STATUS_DOWNLOAD_STOPPED:
+    if (info->value.download.dc == dc)
+      GNUNET_SCHEDULER_add_continuation (&cleanup_task, NULL,
+                                         GNUNET_SCHEDULER_REASON_PREREQ_DONE);
+    break;
+  case GNUNET_FS_STATUS_DOWNLOAD_ACTIVE:
+  case GNUNET_FS_STATUS_DOWNLOAD_INACTIVE:
+    break;
+  default:
+    FPRINTF (stderr, _("Unexpected status: %d\n"), info->status);
+    break;
+  }
+  return NULL;
+}
+
+
+/**
+ * Main function that will be run by the scheduler.
+ *
+ * @param cls closure
+ * @param args remaining command-line arguments
+ * @param cfgfile name of the configuration file used (for saving, can be NULL!)
+ * @param c configuration
+ */
+static void
+run (void *cls, char *const *args, const char *cfgfile,
+     const struct GNUNET_CONFIGURATION_Handle *c)
+{
+  struct GNUNET_FS_Uri *uri;
+  char *emsg;
+  enum GNUNET_FS_DownloadOptions options;
+
+  if (NULL == args[0])
+  {
+    FPRINTF (stderr, "%s",  _("You need to specify a URI argument.\n"));
+    return;
+  }
+  uri = GNUNET_FS_uri_parse (args[0], &emsg);
+  if (NULL == uri)
+  {
+    FPRINTF (stderr, _("Failed to parse URI: %s\n"), emsg);
+    GNUNET_free (emsg);
+    ret = 1;
+    return;
+  }
+  if ((!GNUNET_FS_uri_test_chk (uri)) && (!GNUNET_FS_uri_test_loc (uri)))
+  {
+    FPRINTF (stderr, "%s",  _("Only CHK or LOC URIs supported.\n"));
+    ret = 1;
+    GNUNET_FS_uri_destroy (uri);
+    return;
+  }
+  if (NULL == filename)
+  {
+    FPRINTF (stderr, "%s",  _("Target filename must be specified.\n"));
+    ret = 1;
+    GNUNET_FS_uri_destroy (uri);
+    return;
+  }
+  cfg = c;
+  ctx =
+      GNUNET_FS_start (cfg, "gnunet-download", &progress_cb, NULL,
+                       GNUNET_FS_FLAGS_NONE,
+                       GNUNET_FS_OPTIONS_DOWNLOAD_PARALLELISM, parallelism,
+                       GNUNET_FS_OPTIONS_REQUEST_PARALLELISM,
+                       request_parallelism, GNUNET_FS_OPTIONS_END);
+  if (NULL == ctx)
+  {
+    FPRINTF (stderr, _("Could not initialize `%s' subsystem.\n"), "FS");
+    GNUNET_FS_uri_destroy (uri);
+    ret = 1;
+    return;
+  }
+  options = GNUNET_FS_DOWNLOAD_OPTION_NONE;
+  if (do_recursive)
+    options |= GNUNET_FS_DOWNLOAD_OPTION_RECURSIVE;
+  if (local_only)
+    options |= GNUNET_FS_DOWNLOAD_OPTION_LOOPBACK_ONLY;
+  dc = GNUNET_FS_download_start (ctx, uri, NULL, filename, NULL, 0,
+                                 GNUNET_FS_uri_chk_get_file_size (uri),
+                                 anonymity, options, NULL, NULL);
+  GNUNET_FS_uri_destroy (uri);
+  if (dc == NULL)
+  {
+    GNUNET_FS_stop (ctx);
+    ctx = NULL;
+    return;
+  }
+  GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
+                                NULL);
+}
+
+
+/**
+ * The main function to download GNUnet.
+ *
+ * @param argc number of arguments from the command line
+ * @param argv command line arguments
+ * @return 0 ok, 1 on error
+ */
+int
+main (int argc, char *const *argv)
+{
+  static const struct GNUNET_GETOPT_CommandLineOption options[] = {
+    {'a', "anonymity", "LEVEL",
+     gettext_noop ("set the desired LEVEL of receiver-anonymity"),
+     1, &GNUNET_GETOPT_set_uint, &anonymity},
+    {'D', "delete-incomplete", NULL,
+     gettext_noop ("delete incomplete downloads (when aborted with CTRL-C)"),
+     0, &GNUNET_GETOPT_set_one, &delete_incomplete},
+    {'n', "no-network", NULL,
+     gettext_noop ("only search the local peer (no P2P network search)"),
+     0, &GNUNET_GETOPT_set_uint, &local_only},
+    {'o', "output", "FILENAME",
+     gettext_noop ("write the file to FILENAME"),
+     1, &GNUNET_GETOPT_set_string, &filename},
+    {'p', "parallelism", "DOWNLOADS",
+     gettext_noop
+     ("set the maximum number of parallel downloads that is allowed"),
+     1, &GNUNET_GETOPT_set_uint, &parallelism},
+    {'r', "request-parallelism", "REQUESTS",
+     gettext_noop
+     ("set the maximum number of parallel requests for blocks that is allowed"),
+     1, &GNUNET_GETOPT_set_uint, &request_parallelism},
+    {'R', "recursive", NULL,
+     gettext_noop ("download a GNUnet directory recursively"),
+     0, &GNUNET_GETOPT_set_one, &do_recursive},
+    {'V', "verbose", NULL,
+     gettext_noop ("be verbose (print progress information)"),
+     0, &GNUNET_GETOPT_increment_value, &verbose},
+    GNUNET_GETOPT_OPTION_END
+  };
+  return (GNUNET_OK ==
+          GNUNET_PROGRAM_run (argc, argv, "gnunet-download [OPTIONS] URI",
+                              gettext_noop
+                              ("Download files from GNUnet using a GNUnet CHK or LOC URI (gnunet://fs/chk/...)"),
+                              options, &run, NULL)) ? ret : 1;
+}
+
+/* end of gnunet-download.c */