mirror of
https://github.com/transmission/transmission
synced 2024-12-26 01:27:28 +00:00
364 lines
9 KiB
C
364 lines
9 KiB
C
/*
|
|
* This file Copyright (C) 2008 Charles Kerr <charles@rebelbase.com>
|
|
*
|
|
* This file is licensed by the GPL version 2. Works owned by the
|
|
* Transmission project are granted a special exemption to clause 2(b)
|
|
* so that the bulk of its code can remain under the MIT license.
|
|
* This exemption does not extend to derived works not owned by
|
|
* the Transmission project.
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include <string.h> /* strlen */
|
|
|
|
#include <event.h>
|
|
|
|
#include "transmission.h"
|
|
#include "inout.h"
|
|
#include "list.h"
|
|
#include "ratecontrol.h"
|
|
#include "torrent.h"
|
|
#include "utils.h"
|
|
#include "web.h"
|
|
#include "webseed.h"
|
|
|
|
struct tr_webseed
|
|
{
|
|
unsigned int busy : 1;
|
|
unsigned int dead : 1;
|
|
|
|
uint8_t hash[SHA_DIGEST_LENGTH];
|
|
|
|
char * url;
|
|
|
|
tr_delivery_func * callback;
|
|
void * callback_userdata;
|
|
|
|
tr_piece_index_t pieceIndex;
|
|
uint32_t pieceOffset;
|
|
uint32_t byteCount;
|
|
|
|
tr_ratecontrol * rateDown;
|
|
|
|
tr_session * session;
|
|
|
|
struct evbuffer * content;
|
|
};
|
|
|
|
/***
|
|
****
|
|
***/
|
|
|
|
static const tr_peer_event blankEvent = { 0, 0, 0, 0, 0.0f, 0 };
|
|
|
|
static void
|
|
publish( tr_webseed * w,
|
|
tr_peer_event * e )
|
|
{
|
|
if( w->callback )
|
|
w->callback( NULL, e, w->callback_userdata );
|
|
}
|
|
|
|
static void
|
|
fireNeedReq( tr_webseed * w )
|
|
{
|
|
tr_peer_event e = blankEvent;
|
|
|
|
e.eventType = TR_PEER_NEED_REQ;
|
|
publish( w, &e );
|
|
}
|
|
|
|
static void
|
|
fireClientGotBlock( tr_webseed * w,
|
|
uint32_t pieceIndex,
|
|
uint32_t offset,
|
|
uint32_t length )
|
|
{
|
|
tr_peer_event e = blankEvent;
|
|
|
|
e.eventType = TR_PEER_CLIENT_GOT_BLOCK;
|
|
e.pieceIndex = pieceIndex;
|
|
e.offset = offset;
|
|
e.length = length;
|
|
publish( w, &e );
|
|
}
|
|
|
|
static void
|
|
fireClientGotData( tr_webseed * w,
|
|
uint32_t length )
|
|
{
|
|
tr_peer_event e = blankEvent;
|
|
|
|
e.eventType = TR_PEER_CLIENT_GOT_DATA;
|
|
e.length = length;
|
|
publish( w, &e );
|
|
}
|
|
|
|
/***
|
|
****
|
|
***/
|
|
|
|
static char*
|
|
makeURL( tr_webseed * w,
|
|
const tr_file * file )
|
|
{
|
|
char * ret;
|
|
struct evbuffer * out = evbuffer_new( );
|
|
const char * url = w->url;
|
|
const size_t url_len = strlen( url );
|
|
|
|
evbuffer_add( out, url, url_len );
|
|
|
|
/* if url ends with a '/', add the torrent name */
|
|
if( url[url_len - 1] == '/' )
|
|
{
|
|
const char * str = file->name;
|
|
|
|
/* this is like curl_escape() but doesn't munge the
|
|
* '/' directory separators in the path */
|
|
while( str && *str )
|
|
{
|
|
switch( *str )
|
|
{
|
|
case ',':
|
|
case '-':
|
|
case '.':
|
|
case '/':
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
case 'a':
|
|
case 'b':
|
|
case 'c':
|
|
case 'd':
|
|
case 'e':
|
|
case 'f':
|
|
case 'g':
|
|
case 'h':
|
|
case 'i':
|
|
case 'j':
|
|
case 'k':
|
|
case 'l':
|
|
case 'm':
|
|
case 'n':
|
|
case 'o':
|
|
case 'p':
|
|
case 'q':
|
|
case 'r':
|
|
case 's':
|
|
case 't':
|
|
case 'u':
|
|
case 'v':
|
|
case 'w':
|
|
case 'x':
|
|
case 'y':
|
|
case 'z':
|
|
case 'A':
|
|
case 'B':
|
|
case 'C':
|
|
case 'D':
|
|
case 'E':
|
|
case 'F':
|
|
case 'G':
|
|
case 'H':
|
|
case 'I':
|
|
case 'J':
|
|
case 'K':
|
|
case 'L':
|
|
case 'M':
|
|
case 'N':
|
|
case 'O':
|
|
case 'P':
|
|
case 'Q':
|
|
case 'R':
|
|
case 'S':
|
|
case 'T':
|
|
case 'U':
|
|
case 'V':
|
|
case 'W':
|
|
case 'X':
|
|
case 'Y':
|
|
case 'Z':
|
|
evbuffer_add( out, str, 1 );
|
|
break;
|
|
|
|
default:
|
|
evbuffer_add_printf( out, "%%%02X", *str );
|
|
break;
|
|
}
|
|
str++;
|
|
}
|
|
}
|
|
|
|
ret = tr_strndup( EVBUFFER_DATA( out ), EVBUFFER_LENGTH( out ) );
|
|
evbuffer_free( out );
|
|
return ret;
|
|
}
|
|
|
|
static void requestNextChunk( tr_webseed * w );
|
|
|
|
static void
|
|
webResponseFunc( tr_handle * session,
|
|
long response_code,
|
|
const void * response,
|
|
size_t response_byte_count,
|
|
void * vw )
|
|
{
|
|
tr_webseed * w = vw;
|
|
tr_torrent * tor = tr_torrentFindFromHash( session, w->hash );
|
|
const int success = ( response_code == 206 );
|
|
|
|
/*fprintf( stderr, "server responded with code %ld and %lu bytes\n",
|
|
response_code, (unsigned long)response_byte_count );*/
|
|
if( !success )
|
|
{
|
|
/* FIXME */
|
|
}
|
|
else if( tor != NULL )
|
|
{
|
|
evbuffer_add( w->content, response, response_byte_count );
|
|
if( !w->dead )
|
|
{
|
|
fireClientGotData( w, response_byte_count );
|
|
tr_rcTransferred( w->rateDown, response_byte_count );
|
|
}
|
|
|
|
if( EVBUFFER_LENGTH( w->content ) < w->byteCount )
|
|
requestNextChunk( w );
|
|
else {
|
|
tr_ioWrite( tor, w->pieceIndex, w->pieceOffset, w->byteCount, EVBUFFER_DATA(w->content) );
|
|
evbuffer_drain( w->content, EVBUFFER_LENGTH( w->content ) );
|
|
w->busy = 0;
|
|
if( w->dead )
|
|
tr_webseedFree( w );
|
|
else {
|
|
fireClientGotBlock( w, w->pieceIndex, w->pieceOffset, w->byteCount );
|
|
fireNeedReq( w );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
requestNextChunk( tr_webseed * w )
|
|
{
|
|
tr_torrent * tor = tr_torrentFindFromHash( w->session, w->hash );
|
|
|
|
if( tor != NULL )
|
|
{
|
|
const tr_info * inf = tr_torrentInfo( tor );
|
|
const uint32_t have = EVBUFFER_LENGTH( w->content );
|
|
const uint32_t left = w->byteCount - have;
|
|
const uint32_t pieceOffset = w->pieceOffset + have;
|
|
tr_file_index_t fileIndex;
|
|
uint64_t fileOffset;
|
|
uint32_t thisPass;
|
|
char * url;
|
|
char * range;
|
|
|
|
tr_ioFindFileLocation( tor, w->pieceIndex, pieceOffset,
|
|
&fileIndex, &fileOffset );
|
|
thisPass = MIN( left, inf->files[fileIndex].length - fileOffset );
|
|
|
|
url = makeURL( w, &inf->files[fileIndex] );
|
|
/*fprintf( stderr, "url is [%s]\n", url );*/
|
|
range = tr_strdup_printf( "%"PRIu64"-%"PRIu64, fileOffset, fileOffset + thisPass - 1 );
|
|
/*fprintf( stderr, "range is [%s] ... we want %lu total, we have %lu, so %lu are left, and we're asking for %lu this time\n", range, (unsigned long)w->byteCount, (unsigned long)have, (unsigned long)left, (unsigned long)thisPass );*/
|
|
tr_webRun( w->session, url, range, webResponseFunc, w );
|
|
tr_free( range );
|
|
tr_free( url );
|
|
}
|
|
}
|
|
|
|
tr_addreq_t
|
|
tr_webseedAddRequest( tr_webseed * w,
|
|
uint32_t pieceIndex,
|
|
uint32_t pieceOffset,
|
|
uint32_t byteCount )
|
|
{
|
|
int ret;
|
|
|
|
if( w->busy || w->dead )
|
|
{
|
|
ret = TR_ADDREQ_FULL;
|
|
}
|
|
else
|
|
{
|
|
w->busy = 1;
|
|
w->pieceIndex = pieceIndex;
|
|
w->pieceOffset = pieceOffset;
|
|
w->byteCount = byteCount;
|
|
evbuffer_drain( w->content, EVBUFFER_LENGTH( w->content ) );
|
|
requestNextChunk( w );
|
|
ret = TR_ADDREQ_OK;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
tr_webseedIsActive( const tr_webseed * w )
|
|
{
|
|
return w->busy != 0;
|
|
}
|
|
|
|
int
|
|
tr_webseedGetSpeed( const tr_webseed * w,
|
|
float * setme_KiBs )
|
|
{
|
|
const int isActive = tr_webseedIsActive( w );
|
|
|
|
*setme_KiBs = isActive ? tr_rcRate( w->rateDown ) : 0.0f;
|
|
return isActive;
|
|
}
|
|
|
|
/***
|
|
****
|
|
***/
|
|
|
|
tr_webseed*
|
|
tr_webseedNew( struct tr_torrent * torrent,
|
|
const char * url,
|
|
tr_delivery_func callback,
|
|
void * callback_userdata )
|
|
{
|
|
tr_webseed * w = tr_new0( tr_webseed, 1 );
|
|
|
|
memcpy( w->hash, torrent->info.hash, SHA_DIGEST_LENGTH );
|
|
w->session = torrent->session;
|
|
w->content = evbuffer_new( );
|
|
w->rateDown = tr_rcInit( );
|
|
w->url = tr_strdup( url );
|
|
w->callback = callback;
|
|
w->callback_userdata = callback_userdata;
|
|
/*fprintf( stderr, "w->callback_userdata is %p\n", w->callback_userdata );*/
|
|
return w;
|
|
}
|
|
|
|
void
|
|
tr_webseedFree( tr_webseed * w )
|
|
{
|
|
if( w )
|
|
{
|
|
if( w->busy )
|
|
{
|
|
w->dead = 1;
|
|
}
|
|
else
|
|
{
|
|
evbuffer_free( w->content );
|
|
tr_rcClose( w->rateDown );
|
|
tr_free( w->url );
|
|
tr_free( w );
|
|
}
|
|
}
|
|
}
|