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transmission/utils/show.c

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/*
* This file Copyright (C) Mnemosyne LLC
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
* $Id$
*/
#include <stdio.h> /* fprintf() */
#include <string.h> /* strcmp(), strchr(), memcmp() */
#include <stdlib.h> /* getenv(), qsort() */
#include <time.h>
#define CURL_DISABLE_TYPECHECK /* otherwise -Wunreachable-code goes insane */
#include <curl/curl.h>
#include <event2/buffer.h>
#include <libtransmission/transmission.h>
#include <libtransmission/bencode.h>
#include <libtransmission/tr-getopt.h>
#include <libtransmission/utils.h>
#include <libtransmission/web.h> /* tr_webGetResponseStr() */
#include <libtransmission/version.h>
#define MY_NAME "transmission-show"
#define TIMEOUT_SECS 30
#define MEM_K 1024
#define MEM_K_STR "KiB"
#define MEM_M_STR "MiB"
#define MEM_G_STR "GiB"
#define MEM_T_STR "TiB"
#define DISK_K 1000
#define DISK_B_STR "B"
#define DISK_K_STR "kB"
#define DISK_M_STR "MB"
#define DISK_G_STR "GB"
#define DISK_T_STR "TB"
#define SPEED_K 1000
#define SPEED_B_STR "B/s"
#define SPEED_K_STR "kB/s"
#define SPEED_M_STR "MB/s"
#define SPEED_G_STR "GB/s"
#define SPEED_T_STR "TB/s"
static tr_option options[] =
{
{ 's', "scrape", "Ask the torrent's trackers how many peers are in the torrent's swarm", "s", 0, NULL },
{ 'V', "version", "Show version number and exit", "V", 0, NULL },
{ 0, NULL, NULL, NULL, 0, NULL }
};
static const char *
getUsage( void )
{
return "Usage: " MY_NAME " [options] <.torrent file>";
}
static bool scrapeFlag = false;
static bool showVersion = false;
const char * filename = NULL;
static int
parseCommandLine( int argc, const char ** argv )
{
int c;
const char * optarg;
while(( c = tr_getopt( getUsage( ), argc, argv, options, &optarg )))
{
switch( c )
{
case 's': scrapeFlag = true; break;
case 'V': showVersion = true; break;
case TR_OPT_UNK: filename = optarg; break;
default: return 1;
}
}
return 0;
}
static int
compare_files_by_name( const void * va, const void * vb )
{
const tr_file * a = *(const tr_file**)va;
const tr_file * b = *(const tr_file**)vb;
return strcmp( a->name, b->name );
}
static void
showInfo( const tr_info * inf )
{
int i;
char buf[128];
tr_file ** files;
int prevTier = -1;
/**
*** General Info
**/
printf( "GENERAL\n\n" );
printf( " Name: %s\n", inf->name );
printf( " Hash: %s\n", inf->hashString );
printf( " Created by: %s\n", inf->creator ? inf->creator : "Unknown" );
if( !inf->dateCreated )
printf( " Created on: Unknown\n" );
else {
struct tm tm = *localtime( &inf->dateCreated );
printf( " Created on: %s", asctime( &tm ) );
}
if( inf->comment && *inf->comment )
printf( " Comment: %s\n", inf->comment );
printf( " Piece Count: %d\n", inf->pieceCount );
printf( " Piece Size: %s\n", tr_formatter_mem_B( buf, inf->pieceSize, sizeof( buf ) ) );
printf( " Total Size: %s\n", tr_formatter_size_B( buf, inf->totalSize, sizeof( buf ) ) );
printf( " Privacy: %s\n", inf->isPrivate ? "Private torrent" : "Public torrent" );
/**
*** Trackers
**/
printf( "\nTRACKERS\n" );
for( i=0; i<inf->trackerCount; ++i )
{
if( prevTier != inf->trackers[i].tier )
{
prevTier = inf->trackers[i].tier;
printf( "\n Tier #%d\n", prevTier + 1 );
}
printf( " %s\n", inf->trackers[i].announce );
}
/**
***
**/
if( inf->webseedCount > 0 )
{
printf( "\nWEBSEEDS\n\n" );
for( i=0; i<inf->webseedCount; ++i )
printf( " %s\n", inf->webseeds[i] );
}
/**
*** Files
**/
printf( "\nFILES\n\n" );
files = tr_new( tr_file*, inf->fileCount );
for( i=0; i<(int)inf->fileCount; ++i )
files[i] = &inf->files[i];
qsort( files, inf->fileCount, sizeof(tr_file*), compare_files_by_name );
for( i=0; i<(int)inf->fileCount; ++i )
printf( " %s (%s)\n", files[i]->name, tr_formatter_size_B( buf, files[i]->length, sizeof( buf ) ) );
tr_free( files );
}
static size_t
writeFunc( void * ptr, size_t size, size_t nmemb, void * buf )
{
const size_t byteCount = size * nmemb;
evbuffer_add( buf, ptr, byteCount );
return byteCount;
}
static CURL*
tr_curl_easy_init( struct evbuffer * writebuf )
{
CURL * curl = curl_easy_init( );
curl_easy_setopt( curl, CURLOPT_USERAGENT, MY_NAME "/" LONG_VERSION_STRING );
curl_easy_setopt( curl, CURLOPT_WRITEFUNCTION, writeFunc );
curl_easy_setopt( curl, CURLOPT_WRITEDATA, writebuf );
curl_easy_setopt( curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY );
curl_easy_setopt( curl, CURLOPT_VERBOSE, getenv( "TR_CURL_VERBOSE" ) != NULL );
curl_easy_setopt( curl, CURLOPT_ENCODING, "" );
return curl;
}
static void
doScrape( const tr_info * inf )
{
int i;
for( i=0; i<inf->trackerCount; ++i )
{
CURL * curl;
CURLcode res;
struct evbuffer * buf;
const char * scrape = inf->trackers[i].scrape;
char * url;
char escaped[SHA_DIGEST_LENGTH*3 + 1];
if( scrape == NULL )
continue;
tr_http_escape_sha1( escaped, inf->hash );
url = tr_strdup_printf( "%s%cinfo_hash=%s",
scrape,
strchr( scrape, '?' ) ? '&' : '?',
escaped );
printf( "%s ... ", url );
fflush( stdout );
buf = evbuffer_new( );
curl = tr_curl_easy_init( buf );
curl_easy_setopt( curl, CURLOPT_URL, url );
curl_easy_setopt( curl, CURLOPT_TIMEOUT, TIMEOUT_SECS );
if(( res = curl_easy_perform( curl )))
{
printf( "error: %s\n", curl_easy_strerror( res ) );
}
else
{
long response;
curl_easy_getinfo( curl, CURLINFO_RESPONSE_CODE, &response );
if( response != 200 )
{
printf( "error: unexpected response %ld \"%s\"\n",
response,
tr_webGetResponseStr( response ) );
}
else /* HTTP OK */
{
tr_benc top;
tr_benc * files;
bool matched = false;
const char * begin = (const char*) evbuffer_pullup( buf, -1 );
const char * end = begin + evbuffer_get_length( buf );
if( !tr_bencParse( begin, end, &top, NULL ) )
{
if( tr_bencDictFindDict( &top, "files", &files ) )
{
int i = 0;
tr_benc * val;
const char * key;
while( tr_bencDictChild( files, i++, &key, &val ))
{
if( !memcmp( inf->hash, key, SHA_DIGEST_LENGTH ) )
{
int64_t seeders = -1;
int64_t leechers = -1;
tr_bencDictFindInt( val, "complete", &seeders );
tr_bencDictFindInt( val, "incomplete", &leechers );
printf( "%d seeders, %d leechers\n", (int)seeders, (int)leechers );
matched = true;
}
}
}
tr_bencFree( &top );
}
if( !matched )
printf( "no match\n" );
}
}
curl_easy_cleanup( curl );
evbuffer_free( buf );
tr_free( url );
}
}
int
main( int argc, char * argv[] )
{
int err;
tr_info inf;
tr_ctor * ctor;
tr_setMessageLevel( TR_MSG_ERR );
tr_formatter_mem_init ( MEM_K, MEM_K_STR, MEM_M_STR, MEM_G_STR, MEM_T_STR );
tr_formatter_size_init ( DISK_K, DISK_K_STR, DISK_M_STR, DISK_G_STR, DISK_T_STR );
tr_formatter_speed_init ( SPEED_K, SPEED_K_STR, SPEED_M_STR, SPEED_G_STR, SPEED_T_STR );
if( parseCommandLine( argc, (const char**)argv ) )
return EXIT_FAILURE;
if( showVersion )
{
fprintf( stderr, MY_NAME" "LONG_VERSION_STRING"\n" );
return 0;
}
/* make sure the user specified a filename */
if( !filename )
{
fprintf( stderr, "ERROR: No .torrent file specified.\n" );
tr_getopt_usage( MY_NAME, getUsage( ), options );
fprintf( stderr, "\n" );
return EXIT_FAILURE;
}
/* try to parse the .torrent file */
ctor = tr_ctorNew( NULL );
tr_ctorSetMetainfoFromFile( ctor, filename );
err = tr_torrentParse( ctor, &inf );
tr_ctorFree( ctor );
if( err )
{
fprintf( stderr, "Error parsing .torrent file \"%s\"\n", filename );
return 1;
}
printf( "Name: %s\n", inf.name );
printf( "File: %s\n", filename );
printf( "\n" );
fflush( stdout );
if( scrapeFlag )
doScrape( &inf );
else
showInfo( &inf );
/* cleanup */
putc( '\n', stdout );
tr_metainfoFree( &inf );
return 0;
}
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