333 lines
8.9 KiB
C
333 lines
8.9 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 <stdlib.h> /* bsearch */
|
|
|
|
#include <event.h>
|
|
#include <curl/curl.h>
|
|
|
|
#include "transmission.h"
|
|
#include "trevent.h"
|
|
#include "utils.h"
|
|
#include "web.h"
|
|
|
|
#define CURL_CHECK_VERSION(major,minor,micro) \
|
|
(LIBCURL_VERSION_MAJOR > (major) || \
|
|
(LIBCURL_VERSION_MAJOR == (major) && LIBCURL_VERSION_MINOR > (minor)) || \
|
|
(LIBCURL_VERSION_MAJOR == (major) && LIBCURL_VERSION_MINOR == (minor) && \
|
|
LIBCURL_VERSION_PATCH >= (micro)))
|
|
|
|
#define PULSE_MSEC 500
|
|
|
|
#define dbgmsg(fmt...) tr_deepLog( __FILE__, __LINE__, "web", ##fmt )
|
|
|
|
struct tr_web
|
|
{
|
|
unsigned int dying : 1;
|
|
unsigned int running : 1;
|
|
int remain;
|
|
CURLM * cm;
|
|
tr_session * session;
|
|
struct event timer;
|
|
};
|
|
|
|
struct tr_web_task
|
|
{
|
|
unsigned long tag;
|
|
struct evbuffer * response;
|
|
char * url;
|
|
char * range;
|
|
tr_session * session;
|
|
tr_web_done_func * done_func;
|
|
void * done_func_user_data;
|
|
};
|
|
|
|
static void
|
|
processCompletedTasks( tr_web * web )
|
|
{
|
|
CURL * easy;
|
|
CURLMsg * msg;
|
|
CURLcode res;
|
|
|
|
do {
|
|
/* this convoluted loop is from the "hiperinfo.c" sample which
|
|
* hints that removing an easy handle in curl_multi_info_read's
|
|
* loop may be unsafe */
|
|
int more;
|
|
easy = NULL;
|
|
while(( msg = curl_multi_info_read( web->cm, &more ))) {
|
|
if( msg->msg == CURLMSG_DONE ) {
|
|
easy = msg->easy_handle;
|
|
res = msg->data.result;
|
|
break;
|
|
}
|
|
}
|
|
if( easy ) {
|
|
struct tr_web_task * task;
|
|
long response_code;
|
|
curl_easy_getinfo( easy, CURLINFO_PRIVATE, &task );
|
|
curl_easy_getinfo( easy, CURLINFO_RESPONSE_CODE, &response_code );
|
|
--web->remain;
|
|
dbgmsg( "task #%lu done (%d remain)", task->tag, web->remain );
|
|
task->done_func( web->session,
|
|
response_code,
|
|
EVBUFFER_DATA(task->response),
|
|
EVBUFFER_LENGTH(task->response),
|
|
task->done_func_user_data );
|
|
curl_multi_remove_handle( web->cm, easy );
|
|
curl_easy_cleanup( easy );
|
|
evbuffer_free( task->response );
|
|
tr_free( task->range );
|
|
tr_free( task->url );
|
|
tr_free( task );
|
|
}
|
|
} while( easy );
|
|
}
|
|
|
|
static void
|
|
pump( tr_web * web )
|
|
{
|
|
int unused;
|
|
CURLMcode rc;
|
|
do {
|
|
rc = curl_multi_perform( web->cm, &unused );
|
|
} while( rc == CURLM_CALL_MULTI_PERFORM );
|
|
if ( rc == CURLM_OK )
|
|
processCompletedTasks( web );
|
|
else
|
|
tr_err( "%s", curl_multi_strerror(rc) );
|
|
}
|
|
|
|
static size_t
|
|
writeFunc( void * ptr, size_t size, size_t nmemb, void * task )
|
|
{
|
|
const size_t byteCount = size * nmemb;
|
|
evbuffer_add( ((struct tr_web_task*)task)->response, ptr, byteCount );
|
|
return byteCount;
|
|
}
|
|
|
|
static void
|
|
ensureTimerIsRunning( tr_web * web )
|
|
{
|
|
if( !web->running )
|
|
{
|
|
struct timeval tv = tr_timevalMsec( PULSE_MSEC );
|
|
dbgmsg( "starting web timer" );
|
|
web->running = 1;
|
|
evtimer_add( &web->timer, &tv );
|
|
}
|
|
}
|
|
|
|
static void
|
|
addTask( void * vtask )
|
|
{
|
|
struct tr_web_task * task = vtask;
|
|
|
|
if( task->session && task->session->web )
|
|
{
|
|
struct tr_web * web = task->session->web;
|
|
CURL * ch;
|
|
|
|
ensureTimerIsRunning( web );
|
|
|
|
++web->remain;
|
|
dbgmsg( "adding task #%lu [%s] (%d remain)", task->tag, task->url, web->remain );
|
|
|
|
ch = curl_easy_init( );
|
|
curl_easy_setopt( ch, CURLOPT_PRIVATE, task );
|
|
curl_easy_setopt( ch, CURLOPT_URL, task->url );
|
|
curl_easy_setopt( ch, CURLOPT_WRITEFUNCTION, writeFunc );
|
|
curl_easy_setopt( ch, CURLOPT_WRITEDATA, task );
|
|
curl_easy_setopt( ch, CURLOPT_USERAGENT, TR_NAME "/" LONG_VERSION_STRING );
|
|
curl_easy_setopt( ch, CURLOPT_SSL_VERIFYHOST, 0 );
|
|
curl_easy_setopt( ch, CURLOPT_SSL_VERIFYPEER, 0 );
|
|
curl_easy_setopt( ch, CURLOPT_FORBID_REUSE, 1 );
|
|
curl_easy_setopt( ch, CURLOPT_NOSIGNAL, 1 );
|
|
curl_easy_setopt( ch, CURLOPT_FOLLOWLOCATION, 1 );
|
|
curl_easy_setopt( ch, CURLOPT_MAXREDIRS, 5 );
|
|
curl_easy_setopt( ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4 );
|
|
if( task->range )
|
|
curl_easy_setopt( ch, CURLOPT_RANGE, task->range );
|
|
else /* don't set encoding if range is sent; it messes up binary data */
|
|
curl_easy_setopt( ch, CURLOPT_ENCODING, "" );
|
|
curl_multi_add_handle( web->cm, ch );
|
|
}
|
|
}
|
|
|
|
void
|
|
tr_webRun( tr_session * session,
|
|
const char * url,
|
|
const char * range,
|
|
tr_web_done_func * done_func,
|
|
void * done_func_user_data )
|
|
{
|
|
if( session->web )
|
|
{
|
|
static unsigned long tag = 0;
|
|
struct tr_web_task * task;
|
|
|
|
task = tr_new0( struct tr_web_task, 1 );
|
|
task->session = session;
|
|
task->url = tr_strdup( url );
|
|
task->range = tr_strdup( range );
|
|
task->done_func = done_func;
|
|
task->done_func_user_data = done_func_user_data;
|
|
task->tag = ++tag;
|
|
task->response = evbuffer_new( );
|
|
|
|
tr_runInEventThread( session, addTask, task );
|
|
}
|
|
}
|
|
|
|
static void
|
|
webDestroy( tr_web * web )
|
|
{
|
|
dbgmsg( "deleting web timer" );
|
|
assert( !web->running );
|
|
evtimer_del( &web->timer );
|
|
curl_multi_cleanup( web->cm );
|
|
tr_free( web );
|
|
}
|
|
|
|
static void
|
|
pulse( int socket UNUSED, short action UNUSED, void * vweb )
|
|
{
|
|
tr_web * web = vweb;
|
|
assert( web->running );
|
|
|
|
pump( web );
|
|
|
|
evtimer_del( &web->timer );
|
|
|
|
web->running = web->remain > 0;
|
|
|
|
if( web->running ) {
|
|
struct timeval tv = tr_timevalMsec( PULSE_MSEC );
|
|
evtimer_add( &web->timer, &tv );
|
|
} else if( web->dying ) {
|
|
webDestroy( web );
|
|
} else {
|
|
dbgmsg( "stopping web timer" );
|
|
}
|
|
}
|
|
|
|
tr_web*
|
|
tr_webInit( tr_session * session )
|
|
{
|
|
static int curlInited = FALSE;
|
|
tr_web * web;
|
|
|
|
/* call curl_global_init if we haven't done it already.
|
|
* try to enable ssl for https support; but if that fails,
|
|
* try a plain vanilla init */
|
|
if( curlInited == FALSE ) {
|
|
curlInited = TRUE;
|
|
if( curl_global_init( CURL_GLOBAL_SSL ) )
|
|
curl_global_init( 0 );
|
|
}
|
|
|
|
web = tr_new0( struct tr_web, 1 );
|
|
web->cm = curl_multi_init( );
|
|
web->session = session;
|
|
|
|
evtimer_set( &web->timer, pulse, web );
|
|
#if CURL_CHECK_VERSION(7,16,3)
|
|
curl_multi_setopt( web->cm, CURLMOPT_MAXCONNECTS, 10 );
|
|
#endif
|
|
pump( web );
|
|
|
|
return web;
|
|
}
|
|
|
|
void
|
|
tr_webClose( tr_web ** web_in )
|
|
{
|
|
tr_web * web = *web_in;
|
|
*web_in = NULL;
|
|
|
|
if( !web->running )
|
|
webDestroy( web );
|
|
else
|
|
web->dying = 1;
|
|
}
|
|
|
|
/***
|
|
****
|
|
***/
|
|
|
|
static struct http_msg {
|
|
long code;
|
|
const char * text;
|
|
} http_msg[] = {
|
|
{ 101, "Switching Protocols" },
|
|
{ 200, "OK" },
|
|
{ 201, "Created" },
|
|
{ 202, "Accepted" },
|
|
{ 203, "Non-Authoritative Information" },
|
|
{ 204, "No Content" },
|
|
{ 205, "Reset Content" },
|
|
{ 206, "Partial Content" },
|
|
{ 300, "Multiple Choices" },
|
|
{ 301, "Moved Permanently" },
|
|
{ 302, "Found" },
|
|
{ 303, "See Other" },
|
|
{ 304, "Not Modified" },
|
|
{ 305, "Use Proxy" },
|
|
{ 306, "(Unused)" },
|
|
{ 307, "Temporary Redirect" },
|
|
{ 400, "Bad Request" },
|
|
{ 401, "Unauthorized" },
|
|
{ 402, "Payment Required" },
|
|
{ 403, "Forbidden" },
|
|
{ 404, "Not Found" },
|
|
{ 405, "Method Not Allowed" },
|
|
{ 406, "Not Acceptable" },
|
|
{ 407, "Proxy Authentication Required" },
|
|
{ 408, "Request Timeout" },
|
|
{ 409, "Conflict" },
|
|
{ 410, "Gone" },
|
|
{ 411, "Length Required" },
|
|
{ 412, "Precondition Failed" },
|
|
{ 413, "Request Entity Too Large" },
|
|
{ 414, "Request-URI Too Long" },
|
|
{ 415, "Unsupported Media Type" },
|
|
{ 416, "Requested Range Not Satisfiable" },
|
|
{ 417, "Expectation Failed" },
|
|
{ 500, "Internal Server Error" },
|
|
{ 501, "Not Implemented" },
|
|
{ 502, "Bad Gateway" },
|
|
{ 503, "Service Unavailable" },
|
|
{ 504, "Gateway Timeout" },
|
|
{ 505, "HTTP Version Not Supported" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static int
|
|
compareResponseCodes( const void * va, const void * vb )
|
|
{
|
|
const long a = *(const long*) va;
|
|
const struct http_msg * b = vb;
|
|
return a - b->code;
|
|
}
|
|
|
|
const char *
|
|
tr_webGetResponseStr( long code )
|
|
{
|
|
struct http_msg * msg = bsearch( &code,
|
|
http_msg,
|
|
sizeof( http_msg ) / sizeof( http_msg[0] ),
|
|
sizeof( http_msg[0] ),
|
|
compareResponseCodes );
|
|
return msg ? msg->text : "Unknown Error";
|
|
}
|