macro.c

VLC Player Source Code

/*****************************************************************************
 * macro.c : Custom <vlc> macro handling
 *****************************************************************************
 * Copyright (C) 2001-2005 the VideoLAN team
 * $Id: 7dde365b198104b2f8af2ccb12716aaa7de90db6 $
 *
 * Authors: Gildas Bazin <[e-mail]>
 *          Laurent Aimar <[e-mail]>
 *          Christophe Massiot <[e-mail]>
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include "http.h"
#include "macros.h"
#include "vlc_url.h"

static int MacroParse( macro_t *m, char *psz_src )
{
    char *dup = strdup( (char *)psz_src );
    char *src = dup;
    char *p;
    int     i_skip;

#define EXTRACT( name, l ) \
        src += l;    \
        p = strchr( src, '"' );             \
        if( p )                             \
        {                                   \
            *p++ = '\0';                    \
        }                                   \
        m->name = strdup( src );            \
        if( !p )                            \
        {                                   \
            break;                          \
        }                                   \
        src = p;

    /* init m */
    m->id = NULL;
    m->param1 = NULL;
    m->param2 = NULL;

    /* parse */
    src += 4;

    while( *src )
    {
        while( *src == ' ')
        {
            src++;
        }
        if( !strncmp( src, "id=\"", 4 ) )
        {
            EXTRACT( id, 4 );
        }
        else if( !strncmp( src, "param1=\"", 8 ) )
        {
            EXTRACT( param1, 8 );
        }
        else if( !strncmp( src, "param2=\"", 8 ) )
        {
            EXTRACT( param2, 8 );
        }
        else
        {
            break;
        }
    }
    if( strstr( src, "/>" ) )
    {
        src = strstr( src, "/>" ) + 2;
    }
    else
    {
        src += strlen( src );
    }

    if( m->id == NULL )
    {
        m->id = strdup( "" );
    }
    if( m->param1 == NULL )
    {
        m->param1 = strdup( "" );
    }
    if( m->param2 == NULL )
    {
        m->param2 = strdup( "" );
    }
    i_skip = src - dup;

    free( dup );
    return i_skip;
#undef EXTRACT
}

static void MacroClean( macro_t *m )
{
    free( m->id );
    free( m->param1 );
    free( m->param2 );
}

static int StrToMacroType( const char *name )
{
    int i;

    if( !name || *name == '\0')
    {
        return MVLC_UNKNOWN;
    }
    for( i = 0; StrToMacroTypeTab[i].psz_name != NULL; i++ )
    {
        if( !strcmp( name, StrToMacroTypeTab[i].psz_name ) )
        {
            return StrToMacroTypeTab[i].i_type;
        }
    }
    return MVLC_UNKNOWN;
}

static void MacroDo( httpd_file_sys_t *p_args,
                     macro_t *m,
                     char *p_request, int i_request,
                     char **pp_data,  int *pi_data,
                     char **pp_dst )
{
    intf_thread_t  *p_intf = p_args->p_intf;
    intf_sys_t     *p_sys = p_args->p_intf->p_sys;
    char control[512];

#define ALLOC( l ) \
    {               \
        int __i__ = *pp_dst - *pp_data; \
        *pi_data += (l);                  \
        *pp_data = realloc( *pp_data, *pi_data );   \
        *pp_dst = (*pp_data) + __i__;   \
    }
#define PRINT( str ) \
    ALLOC( strlen( str ) + 1 ); \
    *pp_dst += sprintf( *pp_dst, "%s", str );

#define PRINTS( str, s ) \
    ALLOC( strlen( str ) + strlen( s ) + 1 ); \
    { \
        char * psz_cur = *pp_dst; \
        *pp_dst += sprintf( *pp_dst, str, s ); \
        while( psz_cur && *psz_cur ) \
        {  \
            /* Prevent script injection */ \
            if( *psz_cur == '<' ) *psz_cur = '*'; \
            if( *psz_cur == '>' ) *psz_cur = '*'; \
            psz_cur++ ; \
        } \
    }

    switch( StrToMacroType( m->id ) )
    {
        case MVLC_CONTROL:
            if( i_request <= 0 )
            {
                break;
            }
            ExtractURIValue( p_request, "control", control, 512 );
            if( *m->param1 && !strstr( m->param1, control ) )
            {
                msg_Warn( p_intf, "unauthorized control=%s", control );
                break;
            }
            switch( StrToMacroType( control ) )
            {
                case MVLC_PLAY:
                {
                    int i_item;
                    char item[512];

                    ExtractURIValue( p_request, "item", item, 512 );
                    i_item = atoi( item );
                    /* id = 0 : simply ask playlist to play */
                    if( i_item == 0 )
                    {
                        playlist_Play( p_sys->p_playlist );
                        msg_Dbg( p_intf, "requested playlist play" );
                        break;
                    }
                    playlist_Control( p_sys->p_playlist, PLAYLIST_VIEWPLAY,
                                      true, NULL,
                                      playlist_ItemGetById( p_sys->p_playlist,
                                      i_item, true ) );
                    msg_Dbg( p_intf, "requested playlist item: %i", i_item );
                    break;
                }
                case MVLC_STOP:
                    playlist_Control( p_sys->p_playlist, PLAYLIST_STOP,
                                      true );
                    msg_Dbg( p_intf, "requested playlist stop" );
                    break;
                case MVLC_PAUSE:
                    playlist_Control( p_sys->p_playlist, PLAYLIST_PAUSE,
                                      true );
                    msg_Dbg( p_intf, "requested playlist pause" );
                    break;
                case MVLC_NEXT:
                    playlist_Control( p_sys->p_playlist, PLAYLIST_SKIP,
                                      true, 1 );
                    msg_Dbg( p_intf, "requested playlist next" );
                    break;
                case MVLC_PREVIOUS:
                    playlist_Control( p_sys->p_playlist, PLAYLIST_SKIP,
                                      true, -1 );
                    msg_Dbg( p_intf, "requested playlist previous" );
                    break;
                case MVLC_FULLSCREEN:
                    if( p_sys->p_input )
                    {
                        vout_thread_t *p_vout;
                        p_vout = vlc_object_find( p_sys->p_input,
                                                  VLC_OBJECT_VOUT, FIND_CHILD );

                        if( p_vout )
                        {
                            p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
                            vlc_object_release( p_vout );
                            msg_Dbg( p_intf, "requested fullscreen toggle" );
                        }
                    }
                    break;
                case MVLC_SEEK:
                {
                    char value[30];
                    ExtractURIValue( p_request, "seek_value", value, 30 );
                    decode_URI( value );
                    HandleSeek( p_intf, value );
                    break;
                }
                case MVLC_VOLUME:
                {
                    char vol[8];
                    audio_volume_t i_volume;
                    int i_value;

                    ExtractURIValue( p_request, "value", vol, 8 );
                    aout_VolumeGet( p_intf, &i_volume );
                    decode_URI( vol );

                    if( vol[0] == '+' )
                    {
                        i_value = atoi( vol + 1 );
                        if( (i_volume + i_value) > AOUT_VOLUME_MAX )
                        {
                            aout_VolumeSet( p_intf , AOUT_VOLUME_MAX );
                            msg_Dbg( p_intf, "requested volume set: max" );
                        }
                        else
                        {
                            aout_VolumeSet( p_intf , (i_volume + i_value) );
                            msg_Dbg( p_intf, "requested volume set: +%i", (i_volume + i_value) );
                        }
                    }
                    else if( vol[0] == '-' )
                    {
                        i_value = atoi( vol + 1 );
                        if( (i_volume - i_value) < AOUT_VOLUME_MIN )
                        {
                            aout_VolumeSet( p_intf , AOUT_VOLUME_MIN );
                            msg_Dbg( p_intf, "requested volume set: min" );
                        }
                        else
                        {
                            aout_VolumeSet( p_intf , (i_volume - i_value) );
                            msg_Dbg( p_intf, "requested volume set: -%i", (i_volume - i_value) );
                        }
                    }
                    else if( strstr(vol, "%") != NULL )
                    {
                        i_value = atoi( vol );
                        if( (i_value <= 400) && (i_value>=0) ){
                            aout_VolumeSet( p_intf, (i_value * (AOUT_VOLUME_MAX - AOUT_VOLUME_MIN))/400+AOUT_VOLUME_MIN);
                            msg_Dbg( p_intf, "requested volume set: %i%%", atoi( vol ));
                        }
                    }
                    else
                    {
                        i_value = atoi( vol );
                        if( ( i_value <= AOUT_VOLUME_MAX ) && ( i_value >= AOUT_VOLUME_MIN ) )
                        {
                            aout_VolumeSet( p_intf , atoi( vol ) );
                            msg_Dbg( p_intf, "requested volume set: %i", atoi( vol ) );
                        }
                    }
                    break;
                }

                /* playlist management */
                case MVLC_ADD:
                {
                    char mrl[1024], psz_name[1024], tmp[1024];
                    char *p, *str;
                    input_item_t *p_input;

                    ExtractURIValue( p_request, "mrl", tmp, 1024 );
                    decode_URI( tmp );
                    ExtractURIValue( p_request, "name", psz_name, 1024 );
                    decode_URI( psz_name );
                    if( !*psz_name )
                    {
                        memcpy( psz_name, tmp, 1024 );
                    }
                    /* addslashes for backward compatibility with the old
                     * http intf */
                    p = mrl; str = tmp;
                    while( *str != '\0' )
                    {
                        if( *str == '"' || *str == '\'' || *str == '\\' )
                        {
                            *p++ = '\\';
                        }
                        *p++ = *str;
                        str++;
                    }
                    *p = '\0';

                    p_input = MRLParse( p_intf, mrl, psz_name );

                    char *psz_uri = input_item_GetURI( p_input );
                    if( !p_input || !psz_uri || !*psz_uri )
                    {
                        msg_Dbg( p_intf, "invalid requested mrl: %s", mrl );
                    }
                    else
                    {
                        int i_ret = playlist_AddInput( p_sys->p_playlist,
                                     p_input,
                                     PLAYLIST_APPEND, PLAYLIST_END, true,
                                     false);
                        vlc_gc_decref( p_input );
                        if( i_ret == VLC_SUCCESS )
                            msg_Dbg( p_intf, "requested mrl add: %s", mrl );
                        else
                            msg_Warn( p_intf, "adding mrl %s failed", mrl );
                    }
                    free( psz_uri );

                    break;
                }
                case MVLC_DEL:
                {
                    int i_item, *p_items = NULL, i_nb_items = 0;
                    char item[512], *p_parser = p_request;

                    /* Get the list of items to delete */
                    while( (p_parser =
                            ExtractURIValue( p_parser, "item", item, 512 )) )
                    {
                        if( !*item ) continue;

                        i_item = atoi( item );
                        p_items = realloc( p_items, (i_nb_items + 1) *
                                           sizeof(int) );
                        p_items[i_nb_items] = i_item;
                        i_nb_items++;