mirror/transmission
1
0
Fork 0
mirror of https://github.com/transmission/transmission synced 2024-12-27 01:57:52 +00:00
Code Issues Releases Wiki Activity
transmission/libtransmission/web.c
Charles Kerr 03572a0ad5 add tr_webClose()
2008-04-25 19:46:36 +00:00

387 lines
10 KiB
C
Raw Blame History

/*
* 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 <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)))
#if CURL_CHECK_VERSION(7,16,0)
#define USE_CURL_MULTI_SOCKET
#else
#define PULSE_MSEC 200
#endif
#define dbgmsg(fmt...) tr_deepLog( __FILE__, __LINE__, "web", ##fmt )
struct tr_web
{
CURLM * cm;
tr_session * session;
int remain;
struct event timer;
};
struct tr_web_task
{
unsigned long tag;
struct evbuffer * response;
char * url;
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;
int 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->url );
tr_free( task );
}
} while( easy );
}
static void
pump( tr_web * web )
{
int unused;
CURLMcode rc;
do {
#ifdef USE_CURL_MULTI_SOCKET
rc = curl_multi_socket_all( web->cm, &unused );
#else
rc = curl_multi_perform( web->cm, &unused );
#endif
} 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
addTask( void * vtask )
{
struct tr_web_task * task = vtask;
struct tr_web * web = task->session->web;
CURL * ch;
dbgmsg( "adding task #%lu [%s]", 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_VERIFYPEER, 0 );
curl_multi_add_handle( web->cm, ch );
pump( web );
}
void
tr_webRun( tr_session * session,
const char * url,
tr_web_done_func * done_func,
void * done_func_user_data )
{
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->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 );
}
#ifdef USE_CURL_MULTI_SOCKET
/* libevent says that sock is ready to be processed, so tell libcurl */
static void
ev_sock_cb( int sock, short action, void * vweb )
{
tr_web * web = vweb;
CURLMcode rc;
int mask, unused;
switch (action & (EV_READ|EV_WRITE)) {
case EV_READ: mask = CURL_CSELECT_IN; break;
case EV_WRITE: mask = CURL_CSELECT_OUT; break;
case EV_READ|EV_WRITE: mask = CURL_CSELECT_IN|CURL_CSELECT_OUT; break;
default: tr_err( "Unknown event %hd\n", action ); return;
}
do {
rc = curl_multi_socket_action( web->cm, sock, mask, &unused );
} while( rc == CURLM_CALL_MULTI_PERFORM );
if ( rc == CURLM_OK )
processCompletedTasks( web );
else
tr_err( "%s (%d)", curl_multi_strerror(rc), (int)sock );
}
/* CURLMPOPT_SOCKETFUNCTION */
/* libcurl wants us to tell it when sock is ready to be processed */
static void
multi_sock_cb( CURL * easy UNUSED,
curl_socket_t sock,
int action,
void * vweb,
void * assigndata )
{
tr_web * web = vweb;
struct event * ev = assigndata;
if( action == CURL_POLL_REMOVE ) {
if( ev ) {
event_del( ev );
tr_free( ev );
curl_multi_assign( web->cm, sock, NULL );
}
} else {
int kind;
if( ev ) {
event_del( ev );
} else {
ev = tr_new0( struct event, 1 );
curl_multi_assign( web->cm, sock, ev );
}
kind = EV_PERSIST;
if( action & CURL_POLL_IN ) kind |= EV_READ;
if( action & CURL_POLL_OUT ) kind |= EV_WRITE;
event_set( ev, sock, kind, ev_sock_cb, web );
event_add( ev, NULL );
}
}
/* libevent says that timeout_ms have passed, so tell libcurl */
static void
event_timer_cb( int socket UNUSED, short action UNUSED, void * vweb )
{
int unused;
CURLMcode rc;
tr_web * web = vweb;
do {
rc = curl_multi_socket( web->cm, CURL_SOCKET_TIMEOUT, &unused );
} while( rc == CURLM_CALL_MULTI_PERFORM );
if ( rc == CURLM_OK )
processCompletedTasks( web );
else
tr_err( "%s", curl_multi_strerror(rc) );
}
/* CURLMPOPT_TIMERFUNCTION */
static void
multi_timer_cb( CURLM *multi UNUSED, long timeout_ms, void * vweb )
{
tr_web * web = vweb;
struct timeval tv = tr_timevalMsec( timeout_ms );
evtimer_add( &web->timer, &tv );
}
#else
static void
pulse( int socket UNUSED, short action UNUSED, void * vweb )
{
tr_web * web = vweb;
struct timeval tv = tr_timevalMsec( PULSE_MSEC );
pump( web );
evtimer_del( &web->timer );
evtimer_add( &web->timer, &tv );
}
#endif
tr_web*
tr_webInit( tr_session * session )
{
#ifndef USE_CURL_MULTI_SOCKET
struct timeval tv = tr_timevalMsec( PULSE_MSEC );
#endif
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;
#ifdef USE_CURL_MULTI_SOCKET
evtimer_set( &web->timer, event_timer_cb, web );
curl_multi_setopt( web->cm, CURLMOPT_SOCKETDATA, web );
curl_multi_setopt( web->cm, CURLMOPT_SOCKETFUNCTION, multi_sock_cb );
curl_multi_setopt( web->cm, CURLMOPT_TIMERDATA, web );
curl_multi_setopt( web->cm, CURLMOPT_TIMERFUNCTION, multi_timer_cb );
#else
evtimer_set( &web->timer, pulse, web );
evtimer_add( &web->timer, &tv );
#endif
#if CURL_CHECK_VERSION(7,16,3)
curl_multi_setopt( web->cm, CURLMOPT_MAXCONNECTS, 10 );
#endif
#if CURL_CHECK_VERSION(7,16,0)
curl_multi_setopt( web->cm, CURLMOPT_PIPELINING, 1 );
#endif
pump( web );
return web;
}
void
tr_webClose( tr_web * web )
{
evtimer_del( &web->timer );
curl_multi_cleanup( web->cm );
tr_free( web );
}
/***
****
***/
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";
}
Reference in a new issue View git blame Copy permalink