/*
 * Copyright (C) 2000-2004 the xine project
 * 
 * This file is part of xine, a free video player.
 * 
 * xine 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.
 * 
 * xine 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  02111-1307, USA
 *
 * input plugin for http network streams
 *
 * $Id: input_http.c,v 1.92 2004/06/19 19:28:30 mroi Exp $
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>

#ifndef WIN32
#include <netdb.h>
#include <errno.h>
#endif /* WIN32 */

#include <sys/time.h>

#define LOG_MODULE "input_http"
#define LOG_VERBOSE
/*
#define LOG
*/

#include "xine_internal.h"
#include "xineutils.h"
#include "input_plugin.h"
#include "net_buf_ctrl.h"
#include "http_helper.h"

#define BUFSIZE                 1024

#define DEFAULT_HTTP_PORT         80

#define TAG_ICY_NAME       "icy-name:"
#define TAG_ICY_GENRE      "icy-genre:"
#define TAG_ICY_NOTICE1    "icy-notice1:"
#define TAG_ICY_NOTICE2    "icy-notice2:"
#define TAG_ICY_METAINT    "icy-metaint:"
#define TAG_CONTENT_TYPE   "Content-Type:"

typedef struct {
  input_plugin_t   input_plugin;

  xine_stream_t   *stream;
  
  int              fh;
  char            *mrl;

  nbc_t           *nbc; 

  off_t            curpos;
  off_t            contentlength;
    
  char             buf[BUFSIZE];
  char             proxybuf[BUFSIZE];

  char             auth[BUFSIZE];
  char             proxyauth[BUFSIZE];
  
  char            *proto;
  char            *user;
  char            *password;
  char            *host;
  int              port;
  char            *uri;
  
  char             preview[MAX_PREVIEW_SIZE];
  off_t            preview_size;
  
  /* ShoutCast */
  int              shoutcast_mode;
  int              shoutcast_metaint;
  off_t            shoutcast_pos;
  char            *shoutcast_songtitle;

  /* scratch buffer for forward seeking */

  char             seek_buf[BUFSIZE];
  
} http_input_plugin_t;

typedef struct {

  input_class_t     input_class;

  xine_t           *xine;
  config_values_t  *config;

  char             *proxyhost;
  int               proxyport;
  char             *proxyuser;
  char             *proxypassword;
  char             *noproxylist;

  char             *proxyhost_env;
  int               proxyport_env;
} http_input_class_t;

static void proxy_host_change_cb (void *this_gen, xine_cfg_entry_t *cfg) {
  http_input_class_t *this = (http_input_class_t *)this_gen;

  this->proxyhost = cfg->str_value;
}

static void proxy_port_change_cb(void *this_gen, xine_cfg_entry_t *cfg) {
  http_input_class_t *this = (http_input_class_t *)this_gen;
  
  this->proxyport = cfg->num_value;
}

static void proxy_user_change_cb(void *this_gen, xine_cfg_entry_t *cfg) {
  http_input_class_t *this = (http_input_class_t *)this_gen;

  this->proxyuser = cfg->str_value;
}

static void proxy_password_change_cb(void *this_gen, xine_cfg_entry_t *cfg) {
  http_input_class_t *this = (http_input_class_t *)this_gen;

  this->proxypassword = cfg->str_value;
}

static void no_proxy_list_change_cb(void *this_gen, xine_cfg_entry_t *cfg) {
  http_input_class_t *this = (http_input_class_t *)this_gen;

  this->noproxylist = cfg->str_value;
}

/*
 * handle no proxy list config option and returns, if use the proxy or not
 * if error occured, is expected using the proxy
 */
static int _x_use_proxy(http_input_class_t *this, const char *host) {
  const char *target;
  char *no_proxy, *domain, *ptr;
  struct hostent *info;
  size_t i = 0, host_len, noprox_len;

  /* 
   * get full host name 
   */
  if ((info = gethostbyname(host)) == NULL) {
    xine_log(this->xine, XINE_LOG_MSG, 
        _("input_http: gethostbyname(%s) failed: %s\n"), host,
        xine_hstrerror(h_errno));
    return 1;
  }
  if (!info->h_name) return 1;
  target = info->h_name;

  host_len = strlen(target);
  no_proxy = strdup(this->noproxylist);
  domain = strtok_r(no_proxy, ", ", &ptr);
  while (domain) {
    noprox_len = strlen(domain);
    if (host_len >= noprox_len && strcmp(target + host_len - noprox_len, domain) == 0) {
      lprintf("host '%s' is in no-proxy domain '%s'\n", target, domain);
      return 1;
    }
    lprintf("host '%s' isn't in no-proxy domain '%s'\n", target, domain);
    
    domain = strtok_r(NULL, ", ", &ptr);
    i++;
  }
  free(no_proxy);

  return 0;
}

static int http_plugin_basicauth (const char *user, const char *password, char* dest, int len) {
  static char *enctable="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
  char        *tmp;
  char        *sptr;
  char        *dptr;
  int          totlen;
  int          enclen;
  int          count;
  
  totlen = strlen (user) + 1;
  if(password != NULL)
    totlen += strlen (password);
  
  enclen = ((totlen + 2) / 3 ) * 4 + 1;
  
  if (len < enclen)
    return -1;
  
  tmp = malloc (sizeof(char) * (totlen + 1));
  strcpy (tmp, user);
  strcat (tmp, ":");
  if (password != NULL)
    strcat (tmp, password);  
  
  count = strlen(tmp);
  sptr = tmp;
  dptr = dest;
  while (count >= 3) {
    dptr[0] = enctable[(sptr[0] & 0xFC) >> 2];
    dptr[1] = enctable[((sptr[0] & 0x3) << 4) | ((sptr[1] & 0xF0) >> 4)];
    dptr[2] = enctable[((sptr[1] & 0x0F) << 2) | ((sptr[2] & 0xC0) >> 6)];
    dptr[3] = enctable[sptr[2] & 0x3F];
    count -= 3;
    sptr += 3;
    dptr += 4;
  }
  
  if (count > 0) {
    dptr[0] = enctable[(sptr[0] & 0xFC) >> 2];
    dptr[1] = enctable[(sptr[0] & 0x3) << 4];
    dptr[2] = '=';
    
    if (count > 1) {
      dptr[1] = enctable[((sptr[0] & 0x3) << 4) | ((sptr[1] & 0xF0) >> 4)];
      dptr[2] = enctable[(sptr[1] & 0x0F) << 2];
    }
    
    dptr[3] = '=';
    dptr += 4;
  }
  
  dptr[0] = '\0';
  
  free(tmp);
  return 0;
}

static int http_plugin_read_metainf (http_input_plugin_t *this) {
 
  char metadata_buf[255 * 16];
  unsigned char len = 0;
  char *title_end;
  char *songtitle;
  const char *radio;
  xine_event_t uevent;
  xine_ui_data_t data;
    
  /* get the length of the metadata */
  if (_x_io_tcp_read (this->stream, this->fh, &len, 1) != 1)
    return 0;

  lprintf ("http_plugin_read_metainf: len=%d\n", len);
  
  if (len > 0) {
    if (_x_io_tcp_read (this->stream, this->fh, metadata_buf, len * 16) != (len * 16))
      return 0;
  
    metadata_buf[len * 16] = '\0';
    
    lprintf ("http_plugin_read_metainf: %s\n", metadata_buf);

    /* Extract the title of the current song */
    if ((songtitle = strstr(metadata_buf, "StreamTitle='"))) {
      songtitle += 13; /* skip "StreamTitle='" */
      if ((title_end = strchr(songtitle, '\''))) {
        *title_end = '\0';
        
        if ((!this->shoutcast_songtitle ||
             (strcmp(songtitle, this->shoutcast_songtitle))) &&
            (strlen(songtitle) > 0)) {
  
          lprintf ("http_plugin_read_metainf: songtitle: %s\n", songtitle);
          
          if (this->shoutcast_songtitle)
            free(this->shoutcast_songtitle);
          this->shoutcast_songtitle = strdup(songtitle);

          _x_meta_info_set(this->stream, XINE_META_INFO_TITLE, songtitle);

          /* prepares the event */
          radio = _x_meta_info_get(this->stream, XINE_META_INFO_ALBUM);
          if (radio) {
            int len = strlen(radio);
            strncpy(data.str, radio, sizeof(data.str));
            strncat(data.str, " - ", sizeof(data.str) - len);
            strncat(data.str, songtitle, sizeof(data.str) - len - 3);
          } else {
            strncpy(data.str, songtitle, sizeof(data.str));
          }  
          data.str[sizeof(data.str) - 1] = '\0';
          data.str_len = strlen(data.str) + 1;

          /* sends the event */
          uevent.type = XINE_EVENT_UI_SET_TITLE;
          uevent.stream = this->stream;
          uevent.data = &data;
          uevent.data_length = sizeof(data);
          xine_event_send(this->stream, &uevent);
        }
      }
    }
  }
  return 1;
}

/*
 * Handle shoutcast packets
 */
static off_t http_plugin_read_int (http_input_plugin_t *this,
                                   char *buf, off_t total) {
  int read_bytes = 0;
  int nlen;
  
  lprintf("total=%lld\n", total);
  while (total) {
    nlen = total;
    if (this->shoutcast_mode &&
        ((this->shoutcast_pos + nlen) >= this->shoutcast_metaint)) {
      nlen = this->shoutcast_metaint - this->shoutcast_pos;

      nlen = _x_io_tcp_read (this->stream, this->fh, &buf[read_bytes], nlen);
      if (nlen < 0)
        goto error;

      if (!http_plugin_read_metainf(this))
        goto error;
      this->shoutcast_pos = 0;
      
    } else {
      nlen = _x_io_tcp_read (this->stream, this->fh, &buf[read_bytes], nlen);
      if (nlen < 0)
        goto error;

      this->shoutcast_pos += nlen;
    }
    
    /* end of file */
    if (nlen == 0)
      return read_bytes;
    read_bytes          += nlen;
    total               -= nlen;
  }
  return read_bytes;
  
error:
  if (!_x_action_pending(this->stream)) 
    _x_message (this->stream, XINE_MSG_READ_ERROR, this->host, NULL);
  xine_log (this->stream->xine, XINE_LOG_MSG, _("input_http: read error %d\n"), errno);
  return read_bytes;
}

static off_t http_plugin_read (input_plugin_t *this_gen,
                               char *buf, off_t nlen) {
  http_input_plugin_t *this = (http_input_plugin_t *) this_gen;
  off_t n, num_bytes;

  num_bytes = 0;

  if (this->curpos < this->preview_size) {

    if (nlen > (this->preview_size - this->curpos))
      n = this->preview_size - this->curpos;
    else
      n = nlen;

    lprintf ("%lld bytes from preview (which has %lld bytes)\n", n, this->preview_size);
    memcpy (buf, &this->preview[this->curpos], n);

    num_bytes += n;
    this->curpos += n;
  }

  n = nlen - num_bytes;

  if (n) {
    int read_bytes;
    read_bytes = http_plugin_read_int (this, &buf[num_bytes], n);
    
    if (read_bytes < 0)
      return read_bytes;

    num_bytes += read_bytes;
    this->curpos += read_bytes;
  }

  return num_bytes;
}

static int read_shoutcast_header(http_input_plugin_t *this) {
  int done, len, linenum;

  done = 0; len = 0; linenum = 0;
  while (!done) {

    if (_x_io_tcp_read (this->stream, this->fh, &this->buf[len], 1) != 1) {
      return 0;
    }

    if (this->buf[len] == '\012') {

      this->buf[len] = '\0';
      len--;

      if (len >= 0 && this->buf[len] == '\015') {
        this->buf[len] = '\0';
        len--;
      }

      linenum++;

      lprintf ("shoutcast answer: >%s<\n", this->buf);

      if (!strncasecmp(this->buf, TAG_ICY_NAME, sizeof(TAG_ICY_NAME) - 1)) {
        _x_meta_info_set(this->stream, XINE_META_INFO_ALBUM,
                         (this->buf + sizeof(TAG_ICY_NAME) - 1 +
                          (*(this->buf + sizeof(TAG_ICY_NAME)) == ' ')));
        _x_meta_info_set(this->stream, XINE_META_INFO_TITLE,
                         (this->buf + sizeof(TAG_ICY_NAME) - 1 +
                          (*(this->buf + sizeof(TAG_ICY_NAME)) == ' ')));
      }
      
      if (!strncasecmp(this->buf, TAG_ICY_GENRE, sizeof(TAG_ICY_GENRE) - 1)) {
        _x_meta_info_set(this->stream, XINE_META_INFO_GENRE,
                        (this->buf + sizeof(TAG_ICY_GENRE) - 1 +
                         (*(this->buf + sizeof(TAG_ICY_GENRE)) == ' ')));
      }
      
      /* icy-notice1 is always the same */
      if (!strncasecmp(this->buf, TAG_ICY_NOTICE2, sizeof(TAG_ICY_NOTICE2) - 1)) {
        _x_meta_info_set(this->stream, XINE_META_INFO_COMMENT,
                         (this->buf + sizeof(TAG_ICY_NOTICE2) - 1 +
                          (*(this->buf + sizeof(TAG_ICY_NOTICE2)) == ' ')));
      }

      /* metadata interval (in byte) */
      if (sscanf(this->buf, "icy-metaint:%d", &this->shoutcast_metaint) == 1) {
        lprintf("shoutcast_metaint: %d\n", this->shoutcast_metaint);
      }

      /* content type */
      if (!strncasecmp(this->buf, TAG_CONTENT_TYPE, sizeof(TAG_CONTENT_TYPE) - 1)) {
        if (!strncasecmp(this->buf + sizeof(TAG_CONTENT_TYPE) - 1, "video/nsv", 9)) {
          lprintf("shoutcast nsv detected\n");
          this->shoutcast_mode = 2;
        } else {
          lprintf("shoutcast mp3 detected\n");
        }
      }
      
      if (len == -1)
        done = 1;
      else
        len = 0;
    } else
      len ++;
  }
  
  this->shoutcast_pos = 0;
  
  /* NSV resync */
  /* FIXME: move that to the demuxer */
  if (this->shoutcast_mode == 2) {
    uint8_t c;
    int pos = 0;
    int read_bytes = 0;
  
    lprintf("resyncing NSV stream\n");
    while ((pos < 3) && (read_bytes < (1024*1024))) {
    
      if (http_plugin_read_int(this, &c, 1) != 1)
        return 1;

      this->preview[pos] = c;
      switch (pos) {
        case 0:
          if (c == 'N')
            pos++;
          break;
        case 1:
          if (c == 'S')
            pos++;
          else
            if (c != 'N')
              pos = 0;
          break;
        case 2:
          if (c == 'V')
            pos++;
          else
            if (c == 'N')
              pos = 1;
            else
              pos = 0;
          break;
      }
      read_bytes++;
    }
    if (pos == 3) {
      lprintf("NSV stream resynced\n");
    } else {
      xprintf(this->stream->xine, XINE_VERBOSITY_DEBUG, 
        "http: cannot resync NSV stream!\n");
      return 0;
    }
  }
  lprintf ("end of the shoutcast header\n");

  return 1;
}

static buf_element_t *http_plugin_read_block (input_plugin_t *this_gen, fifo_buffer_t *fifo, off_t todo) {

  off_t                 total_bytes;
  buf_element_t        *buf = fifo->buffer_pool_alloc (fifo);

  buf->content = buf->mem;
  buf->type = BUF_DEMUX_BLOCK;

  total_bytes = http_plugin_read (this_gen, buf->content, todo);

  if (total_bytes != todo) {
    buf->free_buffer (buf);
    buf = NULL;
  }

  if (buf != NULL)
    buf->size = total_bytes;

  return buf;
}

static off_t http_plugin_get_length (input_plugin_t *this_gen) {
  http_input_plugin_t *this = (http_input_plugin_t *) this_gen;

  return this->contentlength;
}

static uint32_t http_plugin_get_capabilities (input_plugin_t *this_gen) {
  http_input_plugin_t *this = (http_input_plugin_t *) this_gen;
  uint32_t caps = INPUT_CAP_PREVIEW;

  /* Nullsoft asked to not allow saving streaming nsv files */
  if (this->uri && strlen(this->uri) >= 4 &&
      !strncmp(this->uri + strlen(this->uri) - 4, ".nsv", 4))
    caps |= INPUT_CAP_RIP_FORBIDDEN;

  return caps;
}

static uint32_t http_plugin_get_blocksize (input_plugin_t *this_gen) {

  return 0;
}

static off_t http_plugin_get_current_pos (input_plugin_t *this_gen){
  http_input_plugin_t *this = (http_input_plugin_t *) this_gen;

  return this->curpos;
}

static off_t http_plugin_seek(input_plugin_t *this_gen, off_t offset, int origin) {
  http_input_plugin_t *this = (http_input_plugin_t *) this_gen;

  if ((origin == SEEK_CUR) && (offset >= 0)) {

    for (;((int)offset) - BUFSIZE > 0; offset -= BUFSIZE) {
      if( !this_gen->read (this_gen, this->seek_buf, BUFSIZE) )
        return this->curpos;
    }

    this_gen->read (this_gen, this->seek_buf, offset);
  }

  if (origin == SEEK_SET) {

    if (offset < this->curpos) {

      if( this->curpos <= this->preview_size )
        this->curpos = offset;
      else
        xprintf(this->stream->xine, XINE_VERBOSITY_DEBUG, 
		"http: cannot seek back! (%lld > %lld)\n", this->curpos, offset);
      
    } else {
      offset -= this->curpos;

      for (;((int)offset) - BUFSIZE > 0; offset -= BUFSIZE) {
        if( !this_gen->read (this_gen, this->seek_buf, BUFSIZE) )
          return this->curpos;
      }

      this_gen->read (this_gen, this->seek_buf, offset);
    }
  }

  return this->curpos;
}

static char* http_plugin_get_mrl (input_plugin_t *this_gen) {
  http_input_plugin_t *this = (http_input_plugin_t *) this_gen;

  return this->mrl;
}

static int http_plugin_get_optional_data (input_plugin_t *this_gen,
					  void *data, int data_type) {

  http_input_plugin_t *this = (http_input_plugin_t *) this_gen;

  switch (data_type) {
  case INPUT_OPTIONAL_DATA_PREVIEW:

    memcpy (data, this->preview, this->preview_size);
    return this->preview_size;

    break;
  }

  return INPUT_OPTIONAL_UNSUPPORTED;
}

static void http_plugin_dispose (input_plugin_t *this_gen ) {
  http_input_plugin_t *this = (http_input_plugin_t *) this_gen;

  if (this->fh != -1) {
    close(this->fh);
    this->fh = -1;
  }
  
  if (this->nbc) {
    nbc_close (this->nbc);
    this->nbc = NULL;
  }

  if (this->mrl) free(this->mrl);
  if (this->proto) free(this->proto);
  if (this->host) free(this->host);
  if (this->user) free(this->user);
  if (this->password) free(this->password);
  if (this->uri) free(this->uri);
  free (this);
}

static void report_progress (xine_stream_t *stream, int p) {

  xine_event_t             event;
  xine_progress_data_t     prg;
  
  prg.description = _("Connecting HTTP server...");
  prg.percent = p;

  event.type = XINE_EVENT_PROGRESS;
  event.data = &prg;
  event.data_length = sizeof (xine_progress_data_t);

  xine_event_send (stream, &event);
}

static int http_plugin_open (input_plugin_t *this_gen ) {
  http_input_plugin_t *this = (http_input_plugin_t *) this_gen;
  http_input_class_t  *this_class = (http_input_class_t *) this->input_plugin.input_class;
  int                  done, len, linenum;
  int                  shoutcast = 0, httpcode;
  int                  res, progress;
  int                  buflen;
  int                  use_proxy;
  int                  proxyport;
  
  use_proxy = this_class->proxyhost && strlen(this_class->proxyhost);
  
  if (use_proxy) {
    if (this_class->proxyuser && strlen(this_class->proxyuser)) {
      if (http_plugin_basicauth (this_class->proxyuser,
			         this_class->proxypassword,
				 this->proxyauth, BUFSIZE)) {
	_x_message(this->stream, XINE_MSG_CONNECTION_REFUSED, "proxy error", NULL);
	return 0;
      }
    }
  }
  
  
  if (!_x_parse_url(this->mrl, &this->proto, &this->host, &this->port,
                    &this->user, &this->password, &this->uri)) {
    _x_message(this->stream, XINE_MSG_GENERAL_WARNING, "malformed url", NULL);
    return 0;
  }
  if (use_proxy && _x_use_proxy(this_class, this->host)) {
    use_proxy = 0;
  }
  if (this->port == 0)
    this->port = DEFAULT_HTTP_PORT;
  
  if ((this->user && strlen(this->user)) && use_proxy) {
    if (http_plugin_basicauth (this->user, this->password, this->auth, BUFSIZE)) {
      _x_message(this->stream, XINE_MSG_CONNECTION_REFUSED, "basic auth error", NULL);
      return 0;
    }
  }
  
  if (this_class->proxyport == 0)
    proxyport = DEFAULT_HTTP_PORT;
  else
    proxyport = this_class->proxyport;

#ifdef LOG
  {
    printf ("input_http: opening >%s< (on host >%s<)", this->mrl, this->host);
    
    if (use_proxy)
      printf (" via proxy >%s:%d<", this_class->proxyhost, proxyport);
    
    printf ("\n");
  }

#endif  
  if (use_proxy)
    this->fh = _x_io_tcp_connect (this->stream, this_class->proxyhost, proxyport);
  else
    this->fh = _x_io_tcp_connect (this->stream, this->host, this->port);
  
  this->curpos = 0;
  
  if (this->fh == -1)
    return 0;
  
  /* connection timeout 20s */
  progress = 0;
  do {
    report_progress(this->stream, progress);
    res = _x_io_select (this->stream, this->fh, XIO_WRITE_READY, 500);
    progress += 2;
  } while ((res == XIO_TIMEOUT) && (progress < 100));
  if (res != XIO_READY)
    return 0;
  
  if (use_proxy) {
    if (this->port != DEFAULT_HTTP_PORT) {
      snprintf (this->buf, BUFSIZE, "GET http://%s:%d%s HTTP/1.0\015\012",
	       this->host, this->port, this->uri);
    } else {
      snprintf (this->buf, BUFSIZE, "GET http://%s%s HTTP/1.0\015\012",
	       this->host, this->uri);
    }
  } 
  else
    snprintf (this->buf, BUFSIZE, "GET %s HTTP/1.0\015\012", this->uri);
  
  buflen = strlen(this->buf);
  if (this->port != DEFAULT_HTTP_PORT)
    snprintf (this->buf + buflen, BUFSIZE - buflen, "Host: %s:%d\015\012",
	     this->host, this->port);
  else
    snprintf (this->buf + buflen, BUFSIZE - buflen, "Host: %s\015\012",
	     this->host);
  
  buflen = strlen(this->buf);
  if (this_class->proxyuser && strlen(this_class->proxyuser)) {
    snprintf (this->buf + buflen, BUFSIZE - buflen,
              "Proxy-Authorization: Basic %s\015\012", this->proxyauth);
    buflen = strlen(this->buf);
  }
  if (this->user && strlen(this->user)) {
    snprintf (this->buf + buflen, BUFSIZE - buflen,
              "Authorization: Basic %s\015\012", this->auth);
    buflen = strlen(this->buf);
  }
  
  snprintf(this->buf + buflen, BUFSIZE - buflen,
           "User-Agent: xine/%s\015\012", VERSION);
  buflen = strlen(this->buf);
  strncat (this->buf, "Accept: */*\015\012", BUFSIZE - buflen);
  buflen = strlen(this->buf);
  strncat (this->buf, "Icy-MetaData: 1\015\012", BUFSIZE - buflen);
  buflen = strlen(this->buf);
  strncat (this->buf, "\015\012", BUFSIZE - buflen);
  buflen = strlen(this->buf);
  if (_x_io_tcp_write (this->stream, this->fh, this->buf, buflen) != buflen) {
    _x_message(this->stream, XINE_MSG_CONNECTION_REFUSED, "couldn't send request", NULL);
    xprintf(this_class->xine, XINE_VERBOSITY_DEBUG, "input_http: couldn't send request\n");
    return 0;
  }

  lprintf ("request sent: >%s<\n", this->buf);

  /* read and parse reply */
  done = 0; len = 0; linenum = 0;
  this->contentlength = 0;

  while (!done) {

    /* 
       printf ("input_http: read...\n");
    */

    if (_x_io_tcp_read (this->stream, this->fh, &this->buf[len], 1) <= 0) {
      return 0;
    }

    if (this->buf[len] == '\012') {

      this->buf[len] = '\0';
      len--;
      
      if (len >= 0 && this->buf[len] == '\015') {
	this->buf[len] = '\0';
	len--;
      }

      linenum++;
      
      lprintf ("answer: >%s<\n", this->buf);

      if (linenum == 1) {
        int httpver, httpsub;
	char httpstatus[51];

	if (sscanf(this->buf, "HTTP/%d.%d %d %50[^\015\012]", &httpver, &httpsub,
		   &httpcode, httpstatus) != 4)	{
	  
	  /* icecast ? */
	  if (sscanf(this->buf, "ICY %d OK", &httpcode) != 1)	{
	    _x_message(this->stream, XINE_MSG_CONNECTION_REFUSED, "invalid http answer", NULL);
	    xine_log (this->stream->xine, XINE_LOG_MSG, 
		      _("input_http: invalid http answer\n"));
	    return 0;
	  } else {
	    shoutcast = 1;
	    done = 1;
	  }
	}

	if (httpcode >= 300 && httpcode < 400) {
      	  xine_log (this->stream->xine, XINE_LOG_MSG, 
		    _("input_http: 3xx redirection: >%d %s<\n"),
		    httpcode, httpstatus);
	} else if (httpcode == 404) {
	  _x_message(this->stream, XINE_MSG_FILE_NOT_FOUND, this->mrl, NULL);
	  xine_log (this->stream->xine, XINE_LOG_MSG,
		    _("input_http: http status not 2xx: >%d %s<\n"),
		                        httpcode, httpstatus);
	  return 0;
	} else if (httpcode == 403) {
          _x_message(this->stream, XINE_MSG_PERMISSION_ERROR, this->mrl, NULL);
	  xine_log (this->stream->xine, XINE_LOG_MSG,
		    _("input_http: http status not 2xx: >%d %s<\n"),
		    httpcode, httpstatus);
	  return 0;
	} else if (httpcode < 200 || httpcode >= 300) {
	  _x_message(this->stream, XINE_MSG_CONNECTION_REFUSED, "http status not 2xx: ",
	               httpstatus, NULL);
      	  xine_log (this->stream->xine, XINE_LOG_MSG,
		    _("input_http: http status not 2xx: >%d %s<\n"),
		    httpcode, httpstatus);
	  return 0;
	}
      } else {
	if (this->contentlength == 0) {
	  off_t contentlength;
	  
	  if (sscanf(this->buf, "Content-Length: %Ld", &contentlength) == 1) {
      	    xine_log (this->stream->xine, XINE_LOG_MSG, 
		      _("input_http: content length = %Ld bytes\n"), contentlength);
	    this->contentlength = contentlength;
	  }
        }
	
	if (!strncasecmp(this->buf, "Location: ", 10)) {
	  char *href = (this->buf + 10);
	  
	  lprintf ("trying to open target of redirection: >%s<\n", href);

          free(this->mrl);
          this->mrl = strdup(href);
          return http_plugin_open(this_gen);
        }
      }
 
      if (len == -1)
	done = 1;
      else
	len = 0;
    } else
      len ++;
  }

  lprintf ("end of headers\n");

  
  /* Trivial shoutcast detection */
  this->shoutcast_metaint = 0;
  this->shoutcast_songtitle = NULL;
  if (shoutcast) {
    this->shoutcast_mode = 1;
    if (!read_shoutcast_header(this)) {
      /* problem when reading shoutcast header */
      _x_message(this->stream, XINE_MSG_CONNECTION_REFUSED, "can't read shoutcast header", NULL);
      xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "can't read shoutcast header\n");
      return 0;
    }
  } else {
    this->shoutcast_mode = 0;
  }

  /*
   * fill preview buffer
   */
  this->preview_size = MAX_PREVIEW_SIZE;
  if (this->shoutcast_mode == 2) {
    /* the first 3 chars are "NSV" */
    this->preview_size = http_plugin_read_int (this, this->preview + 3, MAX_PREVIEW_SIZE - 3);
  } else {
    this->preview_size = http_plugin_read_int (this, this->preview, MAX_PREVIEW_SIZE);
  }
  if (this->preview_size < 0) {
    xine_log (this->stream->xine, XINE_LOG_MSG, _("input_http: read error %d\n"), errno);
    return 0;
  }
  
  lprintf("preview_size=%lld\n", this->preview_size);
  this->curpos = 0;
  
  return 1;
}

/*
 * http input plugin class
 */
static input_plugin_t *http_class_get_instance (input_class_t *cls_gen, xine_stream_t *stream,
				    const char *mrl) {
  /* http_input_class_t  *cls = (http_input_class_t *) cls_gen;*/
  http_input_plugin_t *this;
  
  if (strncasecmp (mrl, "http://", 7)) {
    return NULL;
  }
  this = (http_input_plugin_t *) xine_xmalloc(sizeof(http_input_plugin_t));

  this->mrl     = strdup(mrl);
  this->stream  = stream;
  this->fh      = -1;
  this->nbc     = nbc_init (this->stream);
  
  this->input_plugin.open              = http_plugin_open;
  this->input_plugin.get_capabilities  = http_plugin_get_capabilities;
  this->input_plugin.read              = http_plugin_read;
  this->input_plugin.read_block        = http_plugin_read_block;
  this->input_plugin.seek              = http_plugin_seek;
  this->input_plugin.get_current_pos   = http_plugin_get_current_pos;
  this->input_plugin.get_length        = http_plugin_get_length;
  this->input_plugin.get_blocksize     = http_plugin_get_blocksize;
  this->input_plugin.get_mrl           = http_plugin_get_mrl;
  this->input_plugin.get_optional_data = http_plugin_get_optional_data;
  this->input_plugin.dispose           = http_plugin_dispose;
  this->input_plugin.input_class       = cls_gen;

  return &this->input_plugin;
}

static char *http_class_get_description (input_class_t *this_gen) {
  return _("http input plugin");
}

static char *http_class_get_identifier (input_class_t *this_gen) {
  return "http";
}

static void http_class_dispose (input_class_t *this_gen) {
  http_input_class_t  *this = (http_input_class_t *) this_gen;
  
  if(this->proxyhost_env)
    free(this->proxyhost_env);

  free (this);
}

static void *init_class (xine_t *xine, void *data) {
  http_input_class_t  *this;
  config_values_t     *config;
  char                *proxy_env;

  this = (http_input_class_t *) xine_xmalloc (sizeof (http_input_class_t));

  this->xine   = xine;
  this->config = xine->config;
  config       = xine->config;

  this->input_class.get_instance       = http_class_get_instance;
  this->input_class.get_identifier     = http_class_get_identifier;
  this->input_class.get_description    = http_class_get_description;
  this->input_class.get_dir            = NULL;
  this->input_class.get_autoplay_list  = NULL;
  this->input_class.dispose            = http_class_dispose;
  this->input_class.eject_media        = NULL;

  /* 
   * honour http_proxy envvar 
   */
  if((proxy_env = getenv("http_proxy")) && (strlen(proxy_env))) {
    int    proxy_port = DEFAULT_HTTP_PORT;
    char  *http_proxy = xine_xmalloc(strlen(proxy_env) + 1);
    char  *p;
    
    if(!strncmp(proxy_env, "http://", 7))
      proxy_env += 7;
    
    sprintf(http_proxy, "%s", proxy_env);
    
    if((p = strrchr(&http_proxy[0], ':')) && (strlen(p) > 1)) {
      *p++ = '\0';
      proxy_port = (int) strtol(p, &p, 10);
    }
    
    this->proxyhost_env = strdup(http_proxy);
    this->proxyport_env = proxy_port;
    
    free(http_proxy);
  }

  /*
   * proxy settings
   */
  this->proxyhost = config->register_string(config, 
      "input.http_proxy_host", proxy_env ? this->proxyhost_env : "",
      _("HTTP proxy host"), _("The hostname of the HTTP proxy."), 10,
      proxy_host_change_cb, (void *) this);
  this->proxyport = config->register_num(config,
      "input.http_proxy_port", proxy_env ? this->proxyport_env : DEFAULT_HTTP_PORT,
      _("HTTP proxy port"), _("The port number of the HTTP proxy."), 10,
      proxy_port_change_cb, (void *) this);
  this->proxyuser = config->register_string(config,
      "input.http_proxy_user", "", _("HTTP proxy username"),
      _("The user name for the HTTP proxy."), 10,
      proxy_user_change_cb, (void *) this);
  this->proxypassword = config->register_string(config,
      "input.http_proxy_password", "", _("HTTP proxy password"),
      _("The password for the HTTP proxy."), 10,
      proxy_password_change_cb, (void *) this);
  this->noproxylist = config->register_string(config,
      "input.http_no_proxy", "", _("Domains, where to ignore the HTTP proxy"),
      _("A Comma separated list of domain names, where the proxy is to be ignored."), 10,
      no_proxy_list_change_cb, (void *) this);

  return this;
}

/*
 * exported plugin catalog entry
 */

plugin_info_t xine_plugin_info[] = {
  /* type, API, "name", version, special_info, init_function */  
  { PLUGIN_INPUT, 15, "http", XINE_VERSION_CODE, NULL, init_class },
  { PLUGIN_NONE, 0, "", 0, NULL, NULL }
};