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/*****************************************************************************
 * httpd.c
 *****************************************************************************
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 * Copyright (C) 2004-2005 VideoLAN
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 * $Id$
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 *
 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
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 *          Remi 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 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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

#include <stdlib.h>
#include <vlc/vlc.h>

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#ifdef ENABLE_HTTPD

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#include "vlc_httpd.h"
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#include "network.h"
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#include "vlc_tls.h"
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#include <string.h>
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#include <errno.h>

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#ifdef HAVE_UNISTD_H
#   include <unistd.h>
#endif
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#ifdef HAVE_FCNTL_H
#   include <fcntl.h>
#endif
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#if defined( UNDER_CE )
#   include <winsock.h>
#elif defined( WIN32 )
#   include <winsock2.h>
#   include <ws2tcpip.h>
#else
#   include <netdb.h>                                         /* hostent ... */
#   include <sys/socket.h>
#   include <netinet/in.h>
#   ifdef HAVE_ARPA_INET_H
#       include <arpa/inet.h>                    /* inet_ntoa(), inet_aton() */
#   endif
#endif

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#if defined(WIN32) && !defined(UNDER_CE)
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static const struct in6_addr in6addr_any = {{IN6ADDR_ANY_INIT}};
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#elif defined(UNDER_CE) && defined(AF_INET6)
#   undef AF_INET6
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#endif

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#ifndef PF_INET
#    define PF_INET AF_INET                                          /* BeOS */
#endif

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#if 0
typedef struct httpd_t          httpd_t;

typedef struct httpd_host_t     httpd_host_t;
typedef struct httpd_url_t      httpd_url_t;
typedef struct httpd_client_t   httpd_client_t;

enum
{
    HTTPD_MSG_NONE,

    /* answer */
    HTTPD_MSG_ANSWER,

    /* channel communication */
    HTTPD_MSG_CHANNEL,

    /* http request */
    HTTPD_MSG_GET,
    HTTPD_MSG_HEAD,
    HTTPD_MSG_POST,

    /* rtsp request */
    HTTPD_MSG_OPTIONS,
    HTTPD_MSG_DESCRIBE,
    HTTPD_MSG_SETUP,
    HTTPD_MSG_PLAY,
    HTTPD_MSG_PAUSE,
    HTTPD_MSG_TEARDOWN,

    /* just to track the count of MSG */
    HTTPD_MSG_MAX
};

enum
{
    HTTPD_PROTO_NONE,
    HTTPD_PROTO_HTTP,
    HTTPD_PROTO_RTSP,
};

typedef struct
{
    httpd_client_t *cl; /* NULL if not throught a connection e vlc internal */

    int     i_type;
    int     i_proto;
    int     i_version;

    /* for an answer */
    int     i_status;
    char    *psz_status;

    /* for a query */
    char    *psz_url;
    char    *psz_args;  /* FIXME find a clean way to handle GET(psz_args) and POST(body) through the same code */

    /* for rtp over rtsp */
    int     i_channel;

    /* options */
    int     i_name;
    char    **name;
    int     i_value;
    char    **value;

    /* body */
    int64_t i_body_offset;
    int     i_body;
    uint8_t *p_body;

} httpd_message_t;

typedef struct httpd_callback_sys_t httpd_callback_sys_t;
/* answer could be null, int this case no answer is requested */
typedef int (*httpd_callback_t)( httpd_callback_sys_t *, httpd_client_t *, httpd_message_t *answer, httpd_message_t *query );


/* create a new host */
httpd_host_t *httpd_HostNew( vlc_object_t *, char *psz_host, int i_port );
/* delete a host */
void          httpd_HostDelete( httpd_host_t * );

/* register a new url */
httpd_url_t *httpd_UrlNew( httpd_host_t *, char *psz_url );
/* register callback on a url */
int          httpd_UrlCatch( httpd_url_t *, int i_msg,
                             httpd_callback_t, httpd_callback_sys_t * );
/* delete an url */
void         httpd_UrlDelete( httpd_url_t * );


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void httpd_ClientModeStream( httpd_client_t *cl );
void httpd_ClientModeBidir( httpd_client_t *cl );
static void httpd_ClientClean( httpd_client_t *cl );
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/* High level */
typedef struct httpd_file_t     httpd_file_t;
typedef struct httpd_file_sys_t httpd_file_sys_t;
typedef int (*httpd_file_callback_t)( httpd_file_sys_t*, httpd_file_t *, uint8_t *psz_request, uint8_t **pp_data, int *pi_data );
httpd_file_t *httpd_FileNew( httpd_host_t *,
                             char *psz_url, char *psz_mime,
                             char *psz_user, char *psz_password,
                             httpd_file_callback_t pf_fill,
                             httpd_file_sys_t *p_sys );
void         httpd_FileDelete( httpd_file_t * );

typedef struct httpd_redirect_t httpd_redirect_t;
httpd_redirect_t *httpd_RedirectNew( httpd_host_t *, char *psz_url_dst, char *psz_url_src );
void              httpd_RedirectDelete( httpd_redirect_t * );

#if 0
typedef struct httpd_stream_t httpd_stream_t;
httpd_stream_t *httpd_StreamNew( httpd_host_t * );
int             httpd_StreamHeader( httpd_stream_t *, uint8_t *p_data, int i_data );
int             httpd_StreamSend( httpd_stream_t *, uint8_t *p_data, int i_data );
void            httpd_StreamDelete( httpd_stream_t * );
#endif

/* Msg functions facilities */
void         httpd_MsgInit( httpd_message_t * );
void         httpd_MsgAdd( httpd_message_t *, char *psz_name, char *psz_value, ... );
/* return "" if not found. The string is not allocated */
char        *httpd_MsgGet( httpd_message_t *, char *psz_name );
void         httpd_MsgClean( httpd_message_t * );
#endif

#if 0
struct httpd_t
{
    VLC_COMMON_MEMBERS

    /* vlc_mutex_t  lock; */
    int          i_host;
    httpd_host_t **host;
};
#endif

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static void httpd_ClientClean( httpd_client_t *cl );

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/* each host run in his own thread */
struct httpd_host_t
{
    VLC_COMMON_MEMBERS

    httpd_t     *httpd;

    /* ref count */
    int         i_ref;

    /* address/port and socket for listening at connections */
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    struct sockaddr_storage sock;
    int                     i_sock_size;
    int                     fd;
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    vlc_mutex_t lock;

    /* all registered url (becarefull that 2 httpd_url_t could point at the same url)
     * This will slow down the url research but make my live easier
     * All url will have their cb trigger, but only the first one can answer
     * */
    int         i_url;
    httpd_url_t **url;

    int            i_client;
    httpd_client_t **client;
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    /* TLS data */
    tls_server_t *p_tls;
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};

struct httpd_url_t
{
    httpd_host_t *host;

    vlc_mutex_t lock;

    char    *psz_url;
    char    *psz_user;
    char    *psz_password;

    struct
    {
        httpd_callback_t     cb;
        httpd_callback_sys_t *p_sys;
    } catch[HTTPD_MSG_MAX];
};

/* status */
enum
{
    HTTPD_CLIENT_RECEIVING,
    HTTPD_CLIENT_RECEIVE_DONE,

    HTTPD_CLIENT_SENDING,
    HTTPD_CLIENT_SEND_DONE,

    HTTPD_CLIENT_WAITING,

    HTTPD_CLIENT_DEAD,
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    HTTPD_CLIENT_TLS_HS_IN,
    HTTPD_CLIENT_TLS_HS_OUT
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};
/* mode */
enum
{
    HTTPD_CLIENT_FILE,      /* default */
    HTTPD_CLIENT_STREAM,    /* regulary get data from cb */
    HTTPD_CLIENT_BIDIR,     /* check for reading and get data from cb */
};

struct httpd_client_t
{
    httpd_url_t *url;

    int     i_ref;

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    struct  sockaddr_storage sock;
    int     i_sock_size;
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    int     fd;

    int     i_mode;
    int     i_state;
    int     b_read_waiting; /* stop as soon as possible sending */

    mtime_t i_activity_date;
    mtime_t i_activity_timeout;

    /* buffer for reading header */
    int     i_buffer_size;
    int     i_buffer;
    uint8_t *p_buffer;

    /* */
    httpd_message_t query;  /* client -> httpd */
    httpd_message_t answer; /* httpd -> client */
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    /* TLS data */
    tls_session_t *p_tls;
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};


/*****************************************************************************
 * Various functions
 *****************************************************************************/
/*char b64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";*/
static void b64_decode( char *dest, char *src )
{
    int  i_level;
    int  last = 0;
    int  b64[256] = {
        -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 00-0F */
        -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 10-1F */
        -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,62,-1,-1,-1,63,  /* 20-2F */
        52,53,54,55,56,57,58,59,60,61,-1,-1,-1,-1,-1,-1,  /* 30-3F */
        -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,  /* 40-4F */
        15,16,17,18,19,20,21,22,23,24,25,-1,-1,-1,-1,-1,  /* 50-5F */
        -1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,  /* 60-6F */
        41,42,43,44,45,46,47,48,49,50,51,-1,-1,-1,-1,-1,  /* 70-7F */
        -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 80-8F */
        -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 90-9F */
        -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* A0-AF */
        -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* B0-BF */
        -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* C0-CF */
        -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* D0-DF */
        -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* E0-EF */
        -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1   /* F0-FF */
        };

    for( i_level = 0; *src != '\0'; src++ )
    {
        int  c;

        c = b64[(unsigned int)*src];
        if( c == -1 )
        {
            continue;
        }

        switch( i_level )
        {
            case 0:
                i_level++;
                break;
            case 1:
                *dest++ = ( last << 2 ) | ( ( c >> 4)&0x03 );
                i_level++;
                break;
            case 2:
                *dest++ = ( ( last << 4 )&0xf0 ) | ( ( c >> 2 )&0x0f );
                i_level++;
                break;
            case 3:
                *dest++ = ( ( last &0x03 ) << 6 ) | c;
                i_level = 0;
        }
        last = c;
    }

    *dest = '\0';
}

static struct
{
    char *psz_ext;
    char *psz_mime;
} http_mime[] =
{
    { ".htm",   "text/html" },
    { ".html",  "text/html" },
    { ".txt",   "text/plain" },
    { ".xml",   "text/xml" },
    { ".dtd",   "text/dtd" },

    { ".css",   "text/css" },

    /* image mime */
    { ".gif",   "image/gif" },
    { ".jpe",   "image/jpeg" },
    { ".jpg",   "image/jpeg" },
    { ".jpeg",  "image/jpeg" },
    { ".png",   "image/png" },
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    { ".mpjpeg","multipart/x-mixed-replace; boundary=This Random String" },
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    /* media mime */
    { ".avi",   "video/avi" },
    { ".asf",   "video/x-ms-asf" },
    { ".m1a",   "audio/mpeg" },
    { ".m2a",   "audio/mpeg" },
    { ".m1v",   "video/mpeg" },
    { ".m2v",   "video/mpeg" },
    { ".mp2",   "audio/mpeg" },
    { ".mp3",   "audio/mpeg" },
    { ".mpa",   "audio/mpeg" },
    { ".mpg",   "video/mpeg" },
    { ".mpeg",  "video/mpeg" },
    { ".mpe",   "video/mpeg" },
    { ".mov",   "video/quicktime" },
    { ".moov",  "video/quicktime" },
    { ".ogg",   "application/ogg" },
    { ".ogm",   "application/ogg" },
    { ".wav",   "audio/wav" },
    { ".wma",   "audio/x-ms-wma" },
    { ".wmv",   "video/x-ms-wmv" },


    /* end */
    { NULL,     NULL }
};
static char *httpd_MimeFromUrl( char *psz_url )
{

    char *psz_ext;

    psz_ext = strrchr( psz_url, '.' );
    if( psz_ext )
    {
        int i;

        for( i = 0; http_mime[i].psz_ext != NULL ; i++ )
        {
            if( !strcasecmp( http_mime[i].psz_ext, psz_ext ) )
            {
                return http_mime[i].psz_mime;
            }
        }
    }
    return "application/octet-stream";
}

/*****************************************************************************
 * High Level Funtions: httpd_file_t
 *****************************************************************************/
struct httpd_file_t
{
    httpd_url_t *url;

    char *psz_url;
    char *psz_mime;

    httpd_file_callback_t pf_fill;
    httpd_file_sys_t      *p_sys;

};


static int httpd_FileCallBack( httpd_callback_sys_t *p_sys, httpd_client_t *cl, httpd_message_t *answer, httpd_message_t *query )
{
    httpd_file_t *file = (httpd_file_t*)p_sys;

    if( answer == NULL || query == NULL )
    {
        return VLC_SUCCESS;
    }
    answer->i_proto  = HTTPD_PROTO_HTTP;
    answer->i_version= query->i_version;
    answer->i_type   = HTTPD_MSG_ANSWER;

    answer->i_status = 200;
    answer->psz_status = strdup( "OK" );

    httpd_MsgAdd( answer, "Content-type",  "%s", file->psz_mime );
    httpd_MsgAdd( answer, "Cache-Control", "%s", "no-cache" );

    if( query->i_type != HTTPD_MSG_HEAD )
    {
        char *psz_args = query->psz_args;
        if( query->i_type == HTTPD_MSG_POST )
        {
            /* Check that */
            psz_args = query->p_body;
        }
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        file->pf_fill( file->p_sys, file, psz_args, &answer->p_body,
                       &answer->i_body );
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    }
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    /* We respect client request */
    if( strcmp( httpd_MsgGet( &cl->query, "Connection" ), "" ) )
    {
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        httpd_MsgAdd( answer, "Connection",
                      httpd_MsgGet( &cl->query, "Connection" ) );
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    }

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    httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );

    return VLC_SUCCESS;
}


httpd_file_t *httpd_FileNew( httpd_host_t *host,
                             char *psz_url, char *psz_mime,
                             char *psz_user, char *psz_password,
                             httpd_file_callback_t pf_fill,
                             httpd_file_sys_t *p_sys )
{
    httpd_file_t *file = malloc( sizeof( httpd_file_t ) );

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    if( ( file->url = httpd_UrlNewUnique( host, psz_url, psz_user,
                                          psz_password ) ) == NULL )
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    {
        free( file );
        return NULL;
    }

    file->psz_url  = strdup( psz_url );
    if( psz_mime && *psz_mime )
    {
        file->psz_mime = strdup( psz_mime );
    }
    else
    {
        file->psz_mime = strdup( httpd_MimeFromUrl( psz_url ) );
    }

    file->pf_fill = pf_fill;
    file->p_sys   = p_sys;

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    httpd_UrlCatch( file->url, HTTPD_MSG_HEAD, httpd_FileCallBack,
                    (httpd_callback_sys_t*)file );
    httpd_UrlCatch( file->url, HTTPD_MSG_GET,  httpd_FileCallBack,
                    (httpd_callback_sys_t*)file );
    httpd_UrlCatch( file->url, HTTPD_MSG_POST, httpd_FileCallBack,
                    (httpd_callback_sys_t*)file );
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    return file;
}

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void httpd_FileDelete( httpd_file_t *file )
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{
    httpd_UrlDelete( file->url );

    free( file->psz_url );
    free( file->psz_mime );

    free( file );
}

/*****************************************************************************
 * High Level Funtions: httpd_redirect_t
 *****************************************************************************/
struct httpd_redirect_t
{
    httpd_url_t *url;
    char        *psz_dst;
};

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static int httpd_RedirectCallBack( httpd_callback_sys_t *p_sys,
                                   httpd_client_t *cl, httpd_message_t *answer,
                                   httpd_message_t *query )
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{
    httpd_redirect_t *rdir = (httpd_redirect_t*)p_sys;
    uint8_t *p;

    if( answer == NULL || query == NULL )
    {
        return VLC_SUCCESS;
    }
    answer->i_proto  = query->i_proto;
    answer->i_version= query->i_version;
    answer->i_type   = HTTPD_MSG_ANSWER;
    answer->i_status = 301;
    answer->psz_status = strdup( "Moved Permanently" );

    p = answer->p_body = malloc( 1000 + strlen( rdir->psz_dst ) );
    p += sprintf( p, "<html>\n" );
    p += sprintf( p, "<head>\n" );
    p += sprintf( p, "<title>Redirection</title>\n" );
    p += sprintf( p, "</head>\n" );
    p += sprintf( p, "<body>\n" );
    p += sprintf( p, "<h1><center>You should be <a href=\"%s\">redirected</a></center></h1>\n", rdir->psz_dst );
    p += sprintf( p, "<hr />\n" );
    p += sprintf( p, "<a href=\"http://www.videolan.org\">VideoLAN</a>\n" );
    p += sprintf( p, "</body>\n" );
    p += sprintf( p, "</html>\n" );
    answer->i_body = p - answer->p_body;

    /* XXX check if it's ok or we need to set an absolute url */
    httpd_MsgAdd( answer, "Location",  "%s", rdir->psz_dst );

    httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );

    return VLC_SUCCESS;
}

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httpd_redirect_t *httpd_RedirectNew( httpd_host_t *host, char *psz_url_dst,
                                     char *psz_url_src )
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{
    httpd_redirect_t *rdir = malloc( sizeof( httpd_redirect_t ) );

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    if( !( rdir->url = httpd_UrlNewUnique( host, psz_url_src, NULL, NULL ) ) )
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    {
        free( rdir );
        return NULL;
    }
    rdir->psz_dst = strdup( psz_url_dst );

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    /* Redirect apply for all HTTP request and RTSP DESCRIBE resquest */
    httpd_UrlCatch( rdir->url, HTTPD_MSG_HEAD, httpd_RedirectCallBack,
                    (httpd_callback_sys_t*)rdir );
    httpd_UrlCatch( rdir->url, HTTPD_MSG_GET, httpd_RedirectCallBack,
                    (httpd_callback_sys_t*)rdir );
    httpd_UrlCatch( rdir->url, HTTPD_MSG_POST, httpd_RedirectCallBack,
                    (httpd_callback_sys_t*)rdir );
    httpd_UrlCatch( rdir->url, HTTPD_MSG_DESCRIBE, httpd_RedirectCallBack,
                    (httpd_callback_sys_t*)rdir );
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    return rdir;
}
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void httpd_RedirectDelete( httpd_redirect_t *rdir )
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{
    httpd_UrlDelete( rdir->url );
    free( rdir->psz_dst );
    free( rdir );
}

/*****************************************************************************
 * High Level Funtions: httpd_stream_t
 *****************************************************************************/
struct httpd_stream_t
{
    vlc_mutex_t lock;
    httpd_url_t *url;

    char    *psz_mime;

    /* Header to send as first packet */
    uint8_t *p_header;
    int     i_header;

    /* circular buffer */
    int         i_buffer_size;      /* buffer size, can't be reallocated smaller */
    uint8_t     *p_buffer;          /* buffer */
    int64_t     i_buffer_pos;       /* absolute position from begining */
    int64_t     i_buffer_last_pos;  /* a new connection will start with that */
};

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static int httpd_StreamCallBack( httpd_callback_sys_t *p_sys,
                                 httpd_client_t *cl, httpd_message_t *answer,
                                 httpd_message_t *query )
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{
    httpd_stream_t *stream = (httpd_stream_t*)p_sys;

    if( answer == NULL || query == NULL || cl == NULL )
    {
        return VLC_SUCCESS;
    }
    if( answer->i_body_offset > 0 )
    {
        int64_t i_write;
        int     i_pos;

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#if 0
        fprintf( stderr, "httpd_StreamCallBack i_body_offset=%lld\n",
                 answer->i_body_offset );
#endif
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        if( answer->i_body_offset >= stream->i_buffer_pos )
        {
            /* fprintf( stderr, "httpd_StreamCallBack: no data\n" ); */
            return VLC_EGENERIC;    /* wait, no data available */
        }
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        if( answer->i_body_offset + stream->i_buffer_size <
            stream->i_buffer_pos )
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        {
            /* this client isn't fast enough */
            fprintf( stderr, "fixing i_body_offset (old=%lld new=%lld)\n",
                     answer->i_body_offset, stream->i_buffer_last_pos );
            answer->i_body_offset = stream->i_buffer_last_pos;
        }

        i_pos   = answer->i_body_offset % stream->i_buffer_size;
        i_write = stream->i_buffer_pos - answer->i_body_offset;
        if( i_write > 10000 )
        {
            i_write = 10000;
        }
        else if( i_write <= 0 )
        {
            return VLC_EGENERIC;    /* wait, no data available */
        }

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        /* Don't go past the end of the circular buffer */
        i_write = __MIN( i_write, stream->i_buffer_size - i_pos );

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        /* using HTTPD_MSG_ANSWER -> data available */
        answer->i_proto  = HTTPD_PROTO_HTTP;
        answer->i_version= 0;
        answer->i_type   = HTTPD_MSG_ANSWER;

        answer->i_body = i_write;
        answer->p_body = malloc( i_write );
        memcpy( answer->p_body, &stream->p_buffer[i_pos], i_write );

        answer->i_body_offset += i_write;

        return VLC_SUCCESS;
    }
    else
    {
        answer->i_proto  = HTTPD_PROTO_HTTP;
        answer->i_version= 0;
        answer->i_type   = HTTPD_MSG_ANSWER;

        answer->i_status = 200;
        answer->psz_status = strdup( "OK" );

        if( query->i_type != HTTPD_MSG_HEAD )
        {
            httpd_ClientModeStream( cl );
            vlc_mutex_lock( &stream->lock );
            /* Send the header */
            if( stream->i_header > 0 )
            {
                answer->i_body = stream->i_header;
                answer->p_body = malloc( stream->i_header );
                memcpy( answer->p_body, stream->p_header, stream->i_header );
            }
            answer->i_body_offset = stream->i_buffer_last_pos;
            vlc_mutex_unlock( &stream->lock );
        }
        else
        {
            httpd_MsgAdd( answer, "Content-Length", "%d", 0 );
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            answer->i_body_offset = 0;
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        }

        if( !strcmp( stream->psz_mime, "video/x-ms-asf-stream" ) )
        {
            vlc_bool_t b_xplaystream = VLC_FALSE;
            int i;

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            httpd_MsgAdd( answer, "Content-type", "%s",
                          "application/octet-stream" );
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            httpd_MsgAdd( answer, "Server", "Cougar 4.1.0.3921" );
            httpd_MsgAdd( answer, "Pragma", "no-cache" );
            httpd_MsgAdd( answer, "Pragma", "client-id=%d", rand()&0x7fff );
            httpd_MsgAdd( answer, "Pragma", "features=\"broadcast\"" );
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            /* Check if there is a xPlayStrm=1 */
            for( i = 0; i < query->i_name; i++ )
            {
                if( !strcasecmp( query->name[i],  "Pragma" ) &&
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                    strstr( query->value[i], "xPlayStrm=1" ) )
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                {
                    b_xplaystream = VLC_TRUE;
                }
            }

            if( !b_xplaystream )
            {
                answer->i_body_offset = 0;
            }
        }
        else
        {
            httpd_MsgAdd( answer, "Content-type",  "%s", stream->psz_mime );
        }
        httpd_MsgAdd( answer, "Cache-Control", "%s", "no-cache" );
        return VLC_SUCCESS;
    }
}

httpd_stream_t *httpd_StreamNew( httpd_host_t *host,
                                 char *psz_url, char *psz_mime,
                                 char *psz_user, char *psz_password )
{
    httpd_stream_t *stream = malloc( sizeof( httpd_stream_t ) );

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    if( ( stream->url = httpd_UrlNewUnique( host, psz_url, psz_user,
                                            psz_password ) ) == NULL )
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    {
        free( stream );
        return NULL;
    }
    vlc_mutex_init( host, &stream->lock );
    if( psz_mime && *psz_mime )
    {
        stream->psz_mime = strdup( psz_mime );
    }
    else
    {
        stream->psz_mime = strdup( httpd_MimeFromUrl( psz_url ) );
    }
    stream->i_header = 0;
    stream->p_header = NULL;
    stream->i_buffer_size = 5000000;    /* 5 Mo per stream */
    stream->p_buffer = malloc( stream->i_buffer_size );
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    /* We set to 1 to make life simpler
     * (this way i_body_offset can never be 0) */
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    stream->i_buffer_pos = 1;
    stream->i_buffer_last_pos = 1;

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    httpd_UrlCatch( stream->url, HTTPD_MSG_HEAD, httpd_StreamCallBack,
                    (httpd_callback_sys_t*)stream );
    httpd_UrlCatch( stream->url, HTTPD_MSG_GET, httpd_StreamCallBack,
                    (httpd_callback_sys_t*)stream );
    httpd_UrlCatch( stream->url, HTTPD_MSG_POST, httpd_StreamCallBack,
                    (httpd_callback_sys_t*)stream );
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    return stream;
}

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int httpd_StreamHeader( httpd_stream_t *stream, uint8_t *p_data, int i_data )
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{
    vlc_mutex_lock( &stream->lock );
    if( stream->p_header )
    {
        free( stream->p_header );
        stream->p_header = NULL;
    }
    stream->i_header = i_data;
    if( i_data > 0 )
    {
        stream->p_header = malloc( i_data );
        memcpy( stream->p_header, p_data, i_data );
    }
    vlc_mutex_unlock( &stream->lock );

    return VLC_SUCCESS;
}

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int httpd_StreamSend( httpd_stream_t *stream, uint8_t *p_data, int i_data )
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{
    int i_count;
    int i_pos;

    if( i_data < 0 || p_data == NULL )
    {
        return VLC_SUCCESS;
    }
    vlc_mutex_lock( &stream->lock );

    /* save this pointer (to be used by new connection) */
    stream->i_buffer_last_pos = stream->i_buffer_pos;

    i_pos = stream->i_buffer_pos % stream->i_buffer_size;
    i_count = i_data;
    while( i_count > 0)
    {
        int i_copy;

        i_copy = __MIN( i_count, stream->i_buffer_size - i_pos );

        /* Ok, we can't go past the end of our buffer */
        memcpy( &stream->p_buffer[i_pos], p_data, i_copy );

        i_pos = ( i_pos + i_copy ) % stream->i_buffer_size;
        i_count -= i_copy;
        p_data  += i_copy;
    }

    stream->i_buffer_pos += i_data;

    vlc_mutex_unlock( &stream->lock );
    return VLC_SUCCESS;
}

void httpd_StreamDelete( httpd_stream_t *stream )
{
    httpd_UrlDelete( stream->url );
    vlc_mutex_destroy( &stream->lock );
    if( stream->psz_mime ) free( stream->psz_mime );
    if( stream->p_header ) free( stream->p_header );
    if( stream->p_buffer ) free( stream->p_buffer );
    free( stream );
}


/*****************************************************************************
 * Low level
 *****************************************************************************/
#define LISTEN_BACKLOG          100

static void httpd_HostThread( httpd_host_t * );
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static int GetAddrPort( const struct sockaddr_storage *p_ss );

#ifndef HAVE_GETADDRINFO
struct httpd_addrinfo
{
    int ai_family;
    int ai_socktype;
    int ai_protocol;
    /*int ai_flags;*/
    struct sockaddr *ai_addr;
    int ai_addrlen;
    struct httpd_addrinfo *ai_next;
};
#   define addrinfo httpd_addrinfo

static int BuildAddr( struct sockaddr_in * p_socket,
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                      const char * psz_address, int i_port );
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#endif
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/* create a new host */
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httpd_host_t *httpd_HostNew( vlc_object_t *p_this, char *psz_host,
                             int i_port )
{
    return httpd_TLSHostNew( p_this, psz_host, i_port, NULL );
}

httpd_host_t *httpd_TLSHostNew( vlc_object_t *p_this, char *psz_host,
                                int i_port, tls_server_t *p_tls )
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{
    httpd_t      *httpd;
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    httpd_host_t *host = NULL;
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    vlc_value_t lockval;
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    int fd = -1;
    struct addrinfo *res, *ptr;
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    /* resolv */
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#ifdef HAVE_GETADDRINFO
    {
        vlc_value_t val;
        char psz_port[6];
        struct addrinfo hints;
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        int check;
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        memset( &hints, 0, sizeof( hints ) );
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        /* Check if ipv4 or ipv6 were forced */
        var_Create( p_this, "ipv4", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
        var_Get( p_this, "ipv4", &val );
        if( val.b_bool )
            hints.ai_family = PF_INET;
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        var_Create( p_this, "ipv6", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
        var_Get( p_this, "ipv6", &val );
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        if( val.b_bool )
            hints.ai_family = PF_INET6;
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        hints.ai_socktype = SOCK_STREAM;
        hints.ai_flags = AI_PASSIVE;

        if (*psz_host == '\0')
            psz_host = NULL;

        snprintf( psz_port, sizeof( psz_port ), "%d", i_port );
        psz_port[sizeof( psz_port ) - 1] = '\0';
        
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        check = getaddrinfo( psz_host, psz_port, &hints, &res );
        if( check != 0 )
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        {
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#ifdef HAVE_GAI_STRERROR
            msg_Err( p_this, "cannot resolve %s:%d : %s", psz_host, i_port,
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                     gai_strerror( check ) );
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#else
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            msg_Err( p_this, "cannot resolve %s:%d", psz_host, i_port );
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#endif
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            return NULL;
        }
    }
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#else
    struct sockaddr_in sock;
    struct httpd_addrinfo info;
    
    info.ai_family = PF_INET;
    info.ai_socktype = SOCK_STREAM;
    info.ai_protocol = 0;
    info.ai_addr = (struct sockaddr *)&sock;
    info.ai_addrlen = sizeof( sock );
    info.ai_next = NULL;
    
    res = &info;

    if( BuildAddr( &sock, psz_host, i_port ) )
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    {
        msg_Err( p_this, "cannot build address for %s:%d", psz_host, i_port );
        return NULL;
    }

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#   define freeaddrinfo( r ) (void)0;
#endif

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    /* to be sure to avoid multiple creation */
    var_Create( p_this->p_libvlc, "httpd_mutex", VLC_VAR_MUTEX );
    var_Get( p_this->p_libvlc, "httpd_mutex", &lockval );
    vlc_mutex_lock( lockval.p_address );

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    if( !(httpd = vlc_object_find( p_this, VLC_OBJECT_HTTPD, FIND_ANYWHERE )) )
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    {
        msg_Info( p_this, "creating httpd" );
        if( ( httpd = vlc_object_create( p_this, VLC_OBJECT_HTTPD ) ) == NULL )
        {
            vlc_mutex_unlock( lockval.p_address );
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            freeaddrinfo( res );
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            return NULL;
        }

        httpd->i_host = 0;
        httpd->host   = NULL;

        vlc_object_yield( httpd );
        vlc_object_attach( httpd, p_this->p_vlc );
    }

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    for( ptr = res; (ptr != NULL) && (fd == -1); ptr = ptr->ai_next )
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    {
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        int i;
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        if( ((unsigned)ptr->ai_addrlen) > sizeof( struct sockaddr_storage ) )
        {
            msg_Dbg( p_this, "socket address too big" );
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            continue;
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        }

        /* verify if it already exist */
        for( i = 0; i < httpd->i_host; i++ )
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        {
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            if( GetAddrPort (&httpd->host[i]->sock) != i_port )
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                continue;

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            /* Cannot re-use host if it uses TLS/SSL */
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            if( httpd->host[i]->p_tls != NULL )
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                continue;

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#ifdef AF_INET6
            if( httpd->host[i]->sock.ss_family == AF_INET6 )
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            {
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                const struct sockaddr_in6 *p_hsock, *p_sock;

                p_hsock = (const struct sockaddr_in6 *)&httpd->host[i]->sock;
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                p_sock = (const struct sockaddr_in6 *)ptr->ai_addr;
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                if( memcmp( &p_hsock->sin6_addr, &in6addr_any,
                            sizeof( struct in6_addr ) ) &&
                            ( p_sock->sin6_family != AF_INET6 ||
                              memcmp( &p_hsock->sin6_addr, &p_sock->sin6_addr,
                                      sizeof( struct in6_addr ) ) ) )
                    continue; /* does not match */
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            }
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            else if( ptr->ai_family == PF_INET6 )
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                continue;
            else
#endif
            if( httpd->host[i]->sock.ss_family == AF_INET )
            {
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                const struct sockaddr_in *p_hsock, *p_sock;

                p_hsock = (const struct sockaddr_in *)&httpd->host[i]->sock;
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                p_sock = (const struct sockaddr_in *)ptr->ai_addr;
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                if( p_hsock->sin_addr.s_addr != INADDR_ANY &&
                    ( p_sock->sin_family != AF_INET ||
                      p_hsock->sin_addr.s_addr != p_sock->sin_addr.s_addr ) )
                    continue; /* does not match */
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            }
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            else if( ptr->ai_family == PF_INET )
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                continue;
            else
            {
                msg_Dbg( p_this, "host with unknown address family" );
                continue;
            }

            freeaddrinfo( res );

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            /* yep found */
            host = httpd->host[i];
            host->i_ref++;

            vlc_mutex_unlock( lockval.p_address );

            msg_Dbg( p_this, "host already registered" );
            return host;
        }

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        /* create the listening socket */
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        fd = socket( ptr->ai_family, ptr->ai_socktype, ptr->ai_protocol );
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        if( fd == -1 )
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            continue;

        /* reuse socket */
        {
            int dummy = 1;
            if( setsockopt( fd, SOL_SOCKET, SO_REUSEADDR,
                            (void *)&dummy, sizeof( dummy ) ) < 0 )
            {
                msg_Warn( p_this, "cannot configure socket (SO_REUSEADDR)" );
            }
        }

        /* bind it */
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        if( bind( fd, ptr->ai_addr, ptr->ai_addrlen ) )
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        {
            msg_Err( p_this, "cannot bind socket" );
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            goto socket_error;
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        }
        /* set to non-blocking */
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#if defined( WIN32 ) || defined( UNDER_CE )
        {
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            unsigned long i_dummy = 1;
            if( ioctlsocket( fd, FIONBIO, &i_dummy ) != 0 )
            {
                msg_Err( p_this, "cannot set socket to non-blocking mode" );
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                goto socket_error;
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            }
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        }
#else
        {
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            unsigned int i_flags;
            if( ( i_flags = fcntl( fd, F_GETFL, 0 ) ) < 0 )
            {
                msg_Err( p_this, "cannot F_GETFL socket" );
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                goto socket_error;
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            }
            if( fcntl( fd, F_SETFL, i_flags | O_NONBLOCK ) < 0 )
            {
                msg_Err( p_this, "cannot F_SETFL O_NONBLOCK" );
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                goto socket_error;
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            }
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        }
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#endif
        /* listen */
        if( listen( fd, LISTEN_BACKLOG ) < 0 )
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        {
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            msg_Err( p_this, "cannot listen socket" );
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            goto socket_error;
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        }
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        break; // success
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socket_error:
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        net_Close( fd );
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        fd = -1;
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    }

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    if( fd == -1 )
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    {
        freeaddrinfo( res );
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        goto error;
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    }
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    /* create the new host */
    host = vlc_object_create( p_this, sizeof( httpd_host_t ) );
    host->httpd = httpd;
    vlc_mutex_init( httpd, &host->lock );
    host->i_ref = 1;
    host->fd = fd;

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    memcpy( &host->sock, ptr->ai_addr, ptr->ai_addrlen );
    host->i_sock_size = ptr->ai_addrlen;
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    host->i_url     = 0;
    host->url       = NULL;
    host->i_client  = 0;
    host->client    = NULL;
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    freeaddrinfo( res );
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    host->p_tls = p_tls;
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    /* create the thread */
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    if( vlc_thread_create( host, "httpd host thread", httpd_HostThread,
                           VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
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    {
        msg_Err( p_this, "cannot spawn http host thread" );
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        goto error;
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    }

    /* now add it to httpd */
    TAB_APPEND( httpd->i_host, httpd->host, host );
    vlc_mutex_unlock( lockval.p_address );

    return host;

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error:
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    vlc_mutex_unlock( lockval.p_address );

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    if( fd != -1 )
        net_Close( fd );

    if( host != NULL )
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    {
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        vlc_mutex_destroy( &host->lock );
        vlc_object_destroy( host );
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    }

    /* TODO destroy no more used httpd TODO */
    vlc_object_release( httpd );
    return NULL;
}

/* delete a host */
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void httpd_HostDelete( httpd_host_t *host )
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{
    httpd_t *httpd = host->httpd;
    vlc_value_t lockval;
    int i;

    msg_Dbg( host, "httpd_HostDelete" );

    var_Get( httpd->p_libvlc, "httpd_mutex", &lockval );
    vlc_mutex_lock( lockval.p_address );

    vlc_object_release( httpd );

    host->i_ref--;
    if( host->i_ref > 0 )
    {
        /* still used */
        vlc_mutex_unlock( lockval.p_address );
        msg_Dbg( host, "httpd_HostDelete: host still used" );
        return;
    }
    TAB_REMOVE( httpd->i_host, httpd->host, host );

    msg_Dbg( host, "httpd_HostDelete: host removed from http" );

    host->b_die = 1;
    vlc_thread_join( host );

    msg_Dbg( host, "httpd_HostDelete: host thread joined" );

    for( i = 0; i < host->i_url; i++ )
    {
        msg_Err( host, "url still registered:%s", host->url[i]->psz_url );
    }
    for( i = 0; i < host->i_client; i++ )
    {
        httpd_client_t *cl = host->client[i];
        msg_Warn( host, "client still connected" );
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        httpd_ClientClean( cl );
        TAB_REMOVE( host->i_client, host->client, cl );
        free( cl );
        i--;
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        /* TODO */
    }

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    if( host->p_tls != NULL)
        tls_ServerDelete( host->p_tls );
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    net_Close( host->fd );
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    vlc_mutex_destroy( &host->lock );
    vlc_object_destroy( host );

    if( httpd->i_host <= 0 )
    {
        msg_Info( httpd, "httpd doesn't reference any host, deleting" );
        vlc_object_detach( httpd );
        vlc_object_destroy( httpd );
    }
    vlc_mutex_unlock( lockval.p_address );
}

/* register a new url */
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static httpd_url_t *httpd_UrlNewPrivate( httpd_host_t *host, char *psz_url,
                                         char *psz_user, char *psz_password,
                                         vlc_bool_t b_check )
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{
    httpd_url_t *url;
    int         i;

    vlc_mutex_lock( &host->lock );
    if( b_check )
    {
        for( i = 0; i < host->i_url; i++ )
        {
            if( !strcmp( psz_url, host->url[i]->psz_url ) )
            {
                msg_Warn( host->httpd,
                          "cannot add '%s' (url already defined)", psz_url );
                vlc_mutex_unlock( &host->lock );
                return NULL;
            }
        }
    }

    url = malloc( sizeof( httpd_url_t ) );
    url->host = host;

    vlc_mutex_init( host->httpd, &url->lock );
    url->psz_url = strdup( psz_url );
    url->psz_user = strdup( psz_user ? psz_user : "" );
    url->psz_password = strdup( psz_password ? psz_password : "" );
    for( i = 0; i < HTTPD_MSG_MAX; i++ )
    {
        url->catch[i].cb = NULL;
        url->catch[i].p_sys = NULL;
    }

    TAB_APPEND( host->i_url, host->url, url );
    vlc_mutex_unlock( &host->lock );

    return url;
}

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httpd_url_t *httpd_UrlNew( httpd_host_t *host, char *psz_url,
                           char *psz_user, char *psz_password )
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{
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    return httpd_UrlNewPrivate( host, psz_url, psz_user,
                                psz_password, VLC_FALSE );
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}

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httpd_url_t *httpd_UrlNewUnique( httpd_host_t *host, char *psz_url,
                                 char *psz_user, char *psz_password )
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{
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    return httpd_UrlNewPrivate( host, psz_url, psz_user,
                                psz_password, VLC_TRUE );
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}

/* register callback on a url */
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int httpd_UrlCatch( httpd_url_t *url, int i_msg, httpd_callback_t cb,
                    httpd_callback_sys_t *p_sys )
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{
    vlc_mutex_lock( &url->lock );
    url->catch[i_msg].cb   = cb;
    url->catch[i_msg].p_sys= p_sys;
    vlc_mutex_unlock( &url->lock );

    return VLC_SUCCESS;
}


/* delete an url */
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void httpd_UrlDelete( httpd_url_t *url )
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{
    httpd_host_t *host = url->host;
    int          i;

    vlc_mutex_lock( &host->lock );
    TAB_REMOVE( host->i_url, host->url, url );

    vlc_mutex_destroy( &url->lock );
    free( url->psz_url );
    free( url->psz_user );
    free( url->psz_password );

    for( i = 0; i < host->i_client; i++ )
    {
        httpd_client_t *client = host->client[i];

        if( client->url == url )
        {
            /* TODO complete it */
            msg_Warn( host, "force closing connections" );
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            httpd_ClientClean( client );
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            TAB_REMOVE( host->i_client, host->client, client );
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            free( client );
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            i--;
        }
    }
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    free( url );
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