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path: root/src/fs/gnunet-publish.c
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/*
     This file is part of GNUnet.
     (C) 2001, 2002, 2004, 2005, 2006, 2007, 2009, 2010, 2011 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-publish.c
 * @brief publishing 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 const struct GNUNET_CONFIGURATION_Handle *cfg;

static struct GNUNET_FS_Handle *ctx;

static struct GNUNET_FS_PublishContext *pc;

static struct GNUNET_CONTAINER_MetaData *meta;

static struct GNUNET_FS_Uri *topKeywords;

static struct GNUNET_FS_Uri *uri;

static struct GNUNET_FS_BlockOptions bo = { { 0LL  }, 1, 365, 1 };

static char *uri_string;

static char *next_id;

static char *this_id;

static char *pseudonym;

static int do_insert;

static int disable_extractor;

static int do_simulate;

static int extract_only;

static int do_disable_creation_time;

static GNUNET_SCHEDULER_TaskIdentifier kill_task;


static void 
do_stop_task (void *cls,
	      const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  struct GNUNET_FS_PublishContext *p;

  if (pc != NULL)
    {
      p = pc;
      pc = NULL;
      GNUNET_FS_publish_stop (p);
      if (NULL != meta) 
	{
	  GNUNET_CONTAINER_meta_data_destroy (meta);
	  meta = NULL;
	}
    }
}


/**
 * 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;

  switch (info->status)
    {
    case GNUNET_FS_STATUS_PUBLISH_START:
      break;
    case GNUNET_FS_STATUS_PUBLISH_PROGRESS:
      if (verbose)
	{
	  s = GNUNET_STRINGS_relative_time_to_string(info->value.publish.eta);
	  fprintf (stdout,
		   _("Publishing `%s' at %llu/%llu (%s remaining)\n"),
		   info->value.publish.filename,
		   (unsigned long long) info->value.publish.completed,
		   (unsigned long long) info->value.publish.size,
		   s);
	  GNUNET_free (s);
	}
      break;
    case GNUNET_FS_STATUS_PUBLISH_ERROR:
      fprintf (stderr,
	       _("Error publishing: %s.\n"),
	       info->value.publish.specifics.error.message);
      if (kill_task != GNUNET_SCHEDULER_NO_TASK)
	{
	  GNUNET_SCHEDULER_cancel (kill_task);
	  kill_task = GNUNET_SCHEDULER_NO_TASK;
	}
      GNUNET_SCHEDULER_add_continuation (&do_stop_task,
					 NULL,
					 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
      break;
    case GNUNET_FS_STATUS_PUBLISH_COMPLETED:
      fprintf (stdout,
	       _("Publishing `%s' done.\n"),
	       info->value.publish.filename);
      s = GNUNET_FS_uri_to_string (info->value.publish.specifics.completed.chk_uri);
      fprintf (stdout,
	       _("URI is `%s'.\n"),
	       s);
      GNUNET_free (s);
      if (info->value.publish.pctx == NULL)
	{
	  if (kill_task != GNUNET_SCHEDULER_NO_TASK)
	    {
	      GNUNET_SCHEDULER_cancel (kill_task);
	      kill_task = GNUNET_SCHEDULER_NO_TASK;
	    }
	  GNUNET_SCHEDULER_add_continuation (&do_stop_task,
					     NULL,
					     GNUNET_SCHEDULER_REASON_PREREQ_DONE);
	}
      break;
    case GNUNET_FS_STATUS_PUBLISH_STOPPED: 
      GNUNET_break (NULL == pc);
      return NULL;      
    default:
      fprintf (stderr,
	       _("Unexpected status: %d\n"),
	       info->status);
      return NULL;
    }
  return ""; /* non-null */
}


/**
 * Print metadata entries (except binary
 * metadata and the filename).
 *
 * @param cls closure
 * @param plugin_name name of the plugin that generated the meta data
 * @param type type of the meta data
 * @param format format of data
 * @param data_mime_type mime type of data
 * @param data value of the meta data
 * @param data_size number of bytes in data
 * @return always 0
 */
static int
meta_printer (void *cls,
	      const char *plugin_name,
	      enum EXTRACTOR_MetaType type, 
	      enum EXTRACTOR_MetaFormat format,
	      const char *data_mime_type,
	      const char *data,
	      size_t data_size)
{
  if ( (format != EXTRACTOR_METAFORMAT_UTF8) &&
       (format != EXTRACTOR_METAFORMAT_C_STRING) )
    return 0;
  if (type == EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME) 
    return 0;
  fprintf (stdout, 
	   "\t%s - %s\n",
	   EXTRACTOR_metatype_to_string (type),
	   data);
  return 0;
}


/**
 * Iterator printing keywords
 *
 * @param cls closure
 * @param keyword the keyword
 * @param is_mandatory is the keyword mandatory (in a search)
 * @return GNUNET_OK to continue to iterate, GNUNET_SYSERR to abort
 */

static int
keyword_printer (void *cls,
		 const char *keyword,
		 int is_mandatory)
{
  fprintf (stdout, 
	   "\t%s\n",
	   keyword);
  return GNUNET_OK;
}


/**
 * Function called on all entries before the publication.  This is
 * where we perform modifications to the default based on command-line
 * options.
 *
 * @param cls closure
 * @param fi the entry in the publish-structure
 * @param length length of the file or directory
 * @param m metadata for the file or directory (can be modified)
 * @param uri pointer to the keywords that will be used for this entry (can be modified)
 * @param bo block options
 * @param do_index should we index?
 * @param client_info pointer to client context set upon creation (can be modified)
 * @return GNUNET_OK to continue, GNUNET_NO to remove
 *         this entry from the directory, GNUNET_SYSERR
 *         to abort the iteration
 */
static int
publish_inspector (void *cls,
		   struct GNUNET_FS_FileInformation *fi,
		   uint64_t length,
		   struct GNUNET_CONTAINER_MetaData *m,
		   struct GNUNET_FS_Uri **uri,
		   struct GNUNET_FS_BlockOptions *bo,
		   int *do_index,
		   void **client_info)
{
  char *fn;
  char *fs;
  struct GNUNET_FS_Uri *new_uri;

  if (cls == fi)
    return GNUNET_OK;
  if (NULL != topKeywords)
    {
      if (*uri != NULL)
	{
 	  new_uri = GNUNET_FS_uri_ksk_merge (topKeywords,
					     *uri);
	  GNUNET_FS_uri_destroy (*uri);	
	  *uri = new_uri;
	  GNUNET_FS_uri_destroy (topKeywords);
	}
      else
	{
	  *uri = topKeywords;
	}
      topKeywords = NULL;
    }
  if (NULL != meta) 
    {
      GNUNET_CONTAINER_meta_data_merge (m, meta);
      GNUNET_CONTAINER_meta_data_destroy (meta);
      meta = NULL;
    }
  if (! do_disable_creation_time)
    GNUNET_CONTAINER_meta_data_add_publication_date (m);
  if (extract_only)
    {
      fn = GNUNET_CONTAINER_meta_data_get_by_type (m,
						   EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME);
      fs = GNUNET_STRINGS_byte_size_fancy (length);
      fprintf (stdout,
	       _("Meta data for file `%s' (%s)\n"),
	       fn,
	       fs);
      GNUNET_CONTAINER_meta_data_iterate (m,
					  &meta_printer,
					  NULL);
      fprintf (stdout,
	       _("Keywords for file `%s' (%s)\n"),
	       fn,
	       fs);
      GNUNET_free (fn);
      GNUNET_free (fs);
      if (NULL != *uri)
	GNUNET_FS_uri_ksk_get_keywords (*uri,
					&keyword_printer,
					NULL);
      fprintf (stdout, "\n");
    }
  if (GNUNET_YES == GNUNET_FS_meta_data_test_for_directory (m))
    GNUNET_FS_file_information_inspect (fi,
					&publish_inspector,
					fi);
  return GNUNET_OK;
}


static void 
uri_sks_continuation (void *cls,
		      const struct GNUNET_FS_Uri *ksk_uri,
		      const char *emsg)
{
  if (emsg != NULL)
    {
      fprintf (stderr,
	       "%s\n",
	       emsg);
      ret = 1;
    }
  GNUNET_FS_uri_destroy (uri);
  uri = NULL;
  GNUNET_FS_stop (ctx);
  ctx = NULL;
}


static void 
uri_ksk_continuation (void *cls,
		      const struct GNUNET_FS_Uri *ksk_uri,
		      const char *emsg)
{
  struct GNUNET_FS_Namespace *ns;

  if (emsg != NULL)
    {
      fprintf (stderr,
	       "%s\n",
	       emsg);
      ret = 1;
    }
  if (pseudonym != NULL)
    {
      ns = GNUNET_FS_namespace_create (ctx,
				       pseudonym);
      if (ns == NULL)
	{
	  fprintf (stderr,
		   _("Failed to create namespace `%s'\n"),
		   pseudonym);
	  ret = 1;
	}
      else
	{
	  GNUNET_FS_publish_sks (ctx,
				 ns,
				 this_id,
				 next_id,
				 meta,
				 uri,
				 &bo,
				 GNUNET_FS_PUBLISH_OPTION_NONE,
				 uri_sks_continuation,
				 NULL);
	  GNUNET_assert (GNUNET_OK ==
			 GNUNET_FS_namespace_delete (ns, GNUNET_NO));
	  return;
	}
    }
  GNUNET_FS_uri_destroy (uri);
  uri = NULL;
  GNUNET_FS_stop (ctx);
  ctx = 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_FileInformation *fi;
  struct GNUNET_FS_Namespace *namespace;
  struct EXTRACTOR_PluginList *plugins;
  struct GNUNET_FS_Uri *keywords;
  struct stat sbuf;
  char *ex;
  char *emsg;
  
  /* check arguments */
  if ((uri_string != NULL) && (extract_only))
    {
      printf (_("Cannot extract metadata from a URI!\n"));
      ret = -1;
      return;
    }
  if ( ( (uri_string == NULL) || (extract_only) ) 
       && ( (args[0] == NULL) || (args[1] != NULL) ) )
    {
      printf (_
              ("You must specify one and only one filename for insertion.\n"));
      ret = -1;
      return;
    }
  if ((uri_string != NULL) && (args[0] != NULL))
    {
      printf (_("You must NOT specify an URI and a filename.\n"));
      ret = -1;
      return;
    }
  if (pseudonym != NULL)
    {
      if (NULL == this_id)
        {
          fprintf (stderr,
                   _("Option `%s' is required when using option `%s'.\n"),
                   "-t", "-P");
          ret = -1;
          return;
        }
    }
  else
    {                           /* ordinary insertion checks */
      if (NULL != next_id)
        {
          fprintf (stderr,
                   _("Option `%s' makes no sense without option `%s'.\n"),
                   "-N", "-P");
          ret = -1;
          return;
        }
      if (NULL != this_id)
        {
          fprintf (stderr,
                   _("Option `%s' makes no sense without option `%s'.\n"),
                   "-t", "-P");
          ret = -1;
	  return;
        }
    }
  cfg = c;
  ctx = GNUNET_FS_start (cfg,
			 "gnunet-publish",
			 &progress_cb,
			 NULL,
			 GNUNET_FS_FLAGS_NONE,
			 GNUNET_FS_OPTIONS_END);
  if (NULL == ctx)
    {
      fprintf (stderr,
	       _("Could not initialize `%s' subsystem.\n"),
	       "FS");
      ret = 1;
      return;
    }
  namespace = NULL;
  if (NULL != pseudonym)
    {
      namespace = GNUNET_FS_namespace_create (ctx,
					      pseudonym);
      if (NULL == namespace)
	{
	  fprintf (stderr,
		   _("Could not create namespace `%s'\n"),
		   pseudonym);
	  GNUNET_FS_stop (ctx);
	  ret = 1;
	  return;
	}
    }
  if (NULL != uri_string)
    {      
      emsg = NULL;
      uri = GNUNET_FS_uri_parse (uri_string,
				 &emsg);
      if (uri == NULL)
	{
	  fprintf (stderr, 
		   _("Failed to parse URI: %s\n"),
		   emsg);
	  GNUNET_free (emsg);
	  if (namespace != NULL)
	    GNUNET_FS_namespace_delete (namespace, GNUNET_NO);
	  GNUNET_FS_stop (ctx);
	  ret = 1;
	  return;	  
	}
      GNUNET_FS_publish_ksk (ctx,
			     topKeywords,
			     meta,
			     uri,
			     &bo,
			     GNUNET_FS_PUBLISH_OPTION_NONE,
			     &uri_ksk_continuation,
			     NULL);
      if (namespace != NULL)
	GNUNET_FS_namespace_delete (namespace, GNUNET_NO);
      return;
    }
  plugins = NULL;
  if (! disable_extractor)
    {
      plugins = EXTRACTOR_plugin_add_defaults (EXTRACTOR_OPTION_DEFAULT_POLICY);
      if (GNUNET_OK ==
	  GNUNET_CONFIGURATION_get_value_string (cfg, "FS", "EXTRACTORS",
						 &ex))
	{
	  if (strlen (ex) > 0)
	    plugins = EXTRACTOR_plugin_add_config (plugins, ex, EXTRACTOR_OPTION_DEFAULT_POLICY);
	  GNUNET_free (ex);
	}
    }
  emsg = NULL;
  GNUNET_assert (NULL != args[0]);
  if (0 != STAT (args[0], &sbuf))
    {
      GNUNET_asprintf (&emsg,
		       _("Could not access file: %s\n"),
		       STRERROR (errno));
      fi = NULL;
    }
  else if (S_ISDIR (sbuf.st_mode))
    {
      fi = GNUNET_FS_file_information_create_from_directory (ctx,
							     NULL,
							     args[0],
							     &GNUNET_FS_directory_scanner_default,
							     plugins,
							     !do_insert,
							     &bo,
							     &emsg);
    }
  else
    {
      if (meta == NULL)
	meta = GNUNET_CONTAINER_meta_data_create ();
      GNUNET_FS_meta_data_extract_from_file (meta,
					     args[0],
					     plugins);
      keywords = GNUNET_FS_uri_ksk_create_from_meta_data (meta);
      fi = GNUNET_FS_file_information_create_from_file (ctx,
							NULL,
							args[0],
							keywords,
							NULL,
							!do_insert,
							&bo);
      GNUNET_break (fi != NULL);
      GNUNET_FS_uri_destroy (keywords);
    }
  EXTRACTOR_plugin_remove_all (plugins);  
  if (fi == NULL)
    {
      fprintf (stderr,
	       _("Could not publish `%s': %s\n"),
	       args[0],
	       emsg);
      GNUNET_free (emsg);
      if (namespace != NULL)
	GNUNET_FS_namespace_delete (namespace, GNUNET_NO);
      GNUNET_FS_stop (ctx);
      ret = 1;
      return;
    }
  GNUNET_FS_file_information_inspect (fi,
				      &publish_inspector,
				      NULL);
  if (extract_only)
    {
      if (namespace != NULL)
	GNUNET_FS_namespace_delete (namespace, GNUNET_NO);
      GNUNET_FS_file_information_destroy (fi, NULL, NULL);
      GNUNET_FS_stop (ctx);
      return;
    }
  pc = GNUNET_FS_publish_start (ctx,
				fi,
				namespace,
				this_id,
				next_id,
				(do_simulate) 
				? GNUNET_FS_PUBLISH_OPTION_SIMULATE_ONLY
				: GNUNET_FS_PUBLISH_OPTION_NONE);
  if (NULL == pc)
    {
      fprintf (stderr,
	       _("Could not start publishing.\n"));
      GNUNET_FS_stop (ctx);
      ret = 1;
      return;
    }
  kill_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
					    &do_stop_task,
					    NULL);
}




/**
 * The main function to publish content to 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 sender-anonymity"),
     1, &GNUNET_GETOPT_set_uint, &bo.anonymity_level},
    {'d', "disable-creation-time", NULL,
     gettext_noop
     ("disable adding the creation time to the metadata of the uploaded file"),
     0, &GNUNET_GETOPT_set_one, &do_disable_creation_time},
    {'D', "disable-extractor", NULL,
     gettext_noop
     ("do not use libextractor to add keywords or metadata"),
     0, &GNUNET_GETOPT_set_one, &disable_extractor},
    {'e', "extract", NULL,
     gettext_noop
     ("print list of extracted keywords that would be used, but do not perform upload"),
     0, &GNUNET_GETOPT_set_one, &extract_only},
    {'k', "key", "KEYWORD",
     gettext_noop
     ("add an additional keyword for the top-level file or directory"
      " (this option can be specified multiple times)"),
     1, &GNUNET_FS_getopt_set_keywords, &topKeywords},
    {'m', "meta", "TYPE:VALUE",
     gettext_noop ("set the meta-data for the given TYPE to the given VALUE"),
     1, &GNUNET_FS_getopt_set_metadata, &meta},
    {'n', "noindex", NULL,
     gettext_noop ("do not index, perform full insertion (stores entire "
		   "file in encrypted form in GNUnet database)"),
     0, &GNUNET_GETOPT_set_one, &do_insert},
    {'N', "next", "ID",
     gettext_noop
     ("specify ID of an updated version to be published in the future"
      " (for namespace insertions only)"),
     1, &GNUNET_GETOPT_set_string, &next_id},
    {'p', "priority", "PRIORITY",
     gettext_noop ("specify the priority of the content"),
     1, &GNUNET_GETOPT_set_uint, &bo.content_priority},
    {'P', "pseudonym", "NAME",
     gettext_noop
     ("publish the files under the pseudonym NAME (place file into namespace)"),
     1, &GNUNET_GETOPT_set_string, &pseudonym},
    {'r', "replication", "LEVEL",
     gettext_noop ("set the desired replication LEVEL"),
     1, &GNUNET_GETOPT_set_uint, &bo.replication_level},
    {'s', "simulate-only", NULL,
     gettext_noop ("only simulate the process but do not do any "
		   "actual publishing (useful to compute URIs)"),
     0, &GNUNET_GETOPT_set_one, &do_simulate},
    {'t', "this", "ID",
     gettext_noop ("set the ID of this version of the publication"
		   " (for namespace insertions only)"),
     1, &GNUNET_GETOPT_set_string, &this_id},
    {'u', "uri", "URI",
     gettext_noop ("URI to be published (can be used instead of passing a "
		   "file to add keywords to the file with the respective URI)"),
     1, &GNUNET_GETOPT_set_string, &uri_string}, 
    {'V', "verbose", NULL,
     gettext_noop ("be verbose (print progress information)"),
     0, &GNUNET_GETOPT_set_one, &verbose},
    GNUNET_GETOPT_OPTION_END
  };
  bo.expiration_time = GNUNET_FS_year_to_time (GNUNET_FS_get_current_year () + 2);
  return (GNUNET_OK ==
          GNUNET_PROGRAM_run (argc,
                              argv,
                              "gnunet-publish",
                              gettext_noop
                              ("Publish files on GNUnet."),
                              options, &run, NULL)) ? ret : 1;
}

/* end of gnunet-publish.c */