vlc_url.h 6.09 KB
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/*****************************************************************************
 * vlc_url.h: URL related macros
 *****************************************************************************
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 * Copyright (C) 2002-2006 VLC authors and VideoLAN
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 * $Id$
 *
 * Authors: Christophe Massiot <massiot@via.ecp.fr>
 *          Rémi Denis-Courmont <rem # videolan.org>
 *
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 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
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 * (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
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser 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.
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 *****************************************************************************/

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#ifndef VLC_URL_H
# define VLC_URL_H
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/**
 * \file
 * This file defines functions for manipulating URL in vlc
 */

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struct vlc_url_t
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{
    char *psz_protocol;
    char *psz_username;
    char *psz_password;
    char *psz_host;
    int  i_port;

    char *psz_path;

    char *psz_option;

    char *psz_buffer; /* to be freed */
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};
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VLC_API char * decode_URI_duplicate( const char *psz ) VLC_MALLOC;
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VLC_API char * decode_URI( char *psz );
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VLC_API char * encode_URI_component( const char *psz ) VLC_MALLOC;
VLC_API char * make_URI( const char *path, const char *scheme ) VLC_MALLOC;
VLC_API char * make_path( const char *url ) VLC_MALLOC;
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/*****************************************************************************
 * vlc_UrlParse:
 *****************************************************************************
 * option : if != 0 then path is split at this char
 *
 * format [protocol://[login[:password]@]][host[:port]]/path[OPTIONoption]
 *****************************************************************************/
static inline void vlc_UrlParse( vlc_url_t *url, const char *psz_url,
                                 char option )
{
    char *psz_dup;
    char *psz_parse;
    char *p;
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    char *p2;
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    url->psz_protocol = NULL;
    url->psz_username = NULL;
    url->psz_password = NULL;
    url->psz_host     = NULL;
    url->i_port       = 0;
    url->psz_path     = NULL;
    url->psz_option   = NULL;

    if( psz_url == NULL )
    {
        url->psz_buffer = NULL;
        return;
    }
    url->psz_buffer = psz_parse = psz_dup = strdup( psz_url );

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    /* Search a valid protocol */
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    p  = strstr( psz_parse, ":/" );
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    if( p != NULL )
    {
        for( p2 = psz_parse; p2 < p; p2++ )
        {
#define I(i,a,b) ( (a) <= (i) && (i) <= (b) )
            if( !I(*p2, 'a', 'z' ) && !I(*p2, 'A', 'Z') && !I(*p2, '0', '9') && *p2 != '+' && *p2 != '-' && *p2 != '.' )
            {
                p = NULL;
                break;
            }
#undef I
        }
    }

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    if( p != NULL )
    {
        /* we have a protocol */

        /* skip :// */
        *p++ = '\0';
        if( p[1] == '/' )
            p += 2;
        url->psz_protocol = psz_parse;
        psz_parse = p;
    }
    p = strchr( psz_parse, '@' );
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    p2 = strchr( psz_parse, '/' );
    if( p != NULL && ( p2 != NULL ? p < p2 : 1 ) )
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    {
        /* We have a login */
        url->psz_username = psz_parse;
        *p++ = '\0';

        psz_parse = strchr( psz_parse, ':' );
        if( psz_parse != NULL )
        {
            /* We have a password */
            *psz_parse++ = '\0';
            url->psz_password = psz_parse;
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            decode_URI( url->psz_password );
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        }
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        decode_URI( url->psz_username );
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        psz_parse = p;
    }

    p = strchr( psz_parse, '/' );
    if( !p || psz_parse < p )
    {
        /* We have a host[:port] */
        url->psz_host = strdup( psz_parse );
        if( p )
        {
            url->psz_host[p - psz_parse] = '\0';
        }

        if( *url->psz_host == '[' )
        {
            /* Ipv6 address */
            p2 = strchr( url->psz_host, ']' );
            if( p2 )
            {
                p2 = strchr( p2, ':' );
            }
        }
        else
        {
            p2 = strchr( url->psz_host, ':' );
        }
        if( p2 )
        {
            *p2++ = '\0';
            url->i_port = atoi( p2 );
        }
    }
    psz_parse = p;

    /* Now parse psz_path and psz_option */
    if( psz_parse )
    {
        url->psz_path = psz_parse;
        if( option != '\0' )
        {
            p = strchr( url->psz_path, option );
            if( p )
            {
                *p++ = '\0';
                url->psz_option = p;
            }
        }
    }
}

/*****************************************************************************
 * vlc_UrlClean:
 *****************************************************************************/
static inline void vlc_UrlClean( vlc_url_t *url )
{
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    free( url->psz_buffer );
    free( url->psz_host );
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    url->psz_protocol = NULL;
    url->psz_username = NULL;
    url->psz_password = NULL;
    url->psz_host     = NULL;
    url->i_port       = 0;
    url->psz_path     = NULL;
    url->psz_option   = NULL;

    url->psz_buffer   = NULL;
}

#include <ctype.h>

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/** Check whether a given string is not a valid URL and must hence be
 *  encoded */
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static inline int vlc_UrlIsNotEncoded( const char *psz_url )
{
    const char *ptr;

    for( ptr = psz_url; *ptr; ptr++ )
    {
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        unsigned char c = *ptr;
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        if( c == '%' )
        {
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            if( !isxdigit( (unsigned char)ptr[1] )
             || !isxdigit( (unsigned char)ptr[2] ) )
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                return 1; /* not encoded */
            ptr += 2;
        }
        else
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        if(  ( (unsigned char)( c - 'a' ) < 26 )
          || ( (unsigned char)( c - 'A' ) < 26 )
          || ( (unsigned char)( c - '0' ) < 10 )
          || ( strchr( "-_.", c ) != NULL ) )
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            return 1;
    }
    return 0; /* looks fine - but maybe it is not encoded */
}

#endif