fs.c

实现在指定视频服务器下的视频点播

/**
 * \addtogroup httpd
 * @{
 */

/**
 * \file
 * HTTP server read-only file system code.
 * \author Adam Dunkels <[e-mail]>
 *
 * A simple read-only filesystem. 
 */
 
/*
 * Copyright (c) 2001, Swedish Institute of Computer Science.
 * All rights reserved. 
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 * 3. Neither the name of the Institute nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE. 
 *
 * This file is part of the lwIP TCP/IP stack.
 * 
 * Author: Adam Dunkels <[e-mail]>
 *
 * $Id: fs.c,v 1.7.2.3 2003/10/07 13:22:27 adam Exp $
 */

#include "uip.h"
#include "httpd.h"
#include "fs.h"
#include "fsdata.h"

#define NULL (void *)0
#include "fsdata.c"

#ifdef FS_STATISTICS
#if FS_STATISTICS == 1
static u16_t count[FS_NUMFILES];
#endif /* FS_STATISTICS */
#endif /* FS_STATISTICS */


/* Note: the figure shows the start address in this array. The first characters are the path locations e.g. data_cgi_files + 11
	
struct fsdata_file{
					next;				//NULL
					name;				//data_cgi_files
					data address;		//data_cgi_files + 11
					length;				//sizeof(data_cgi_files) - 11
	}
*/

//const struct fsdata_file file_cgi_files[] = {{NULL, data_cgi_files, data_cgi_files + 11, sizeof(data_cgi_files) - 11}};
//const struct fsdata_file file_cgi_stats[] = {{NULL, data_cgi_stats, data_cgi_stats + 11, sizeof(data_cgi_stats) - 11}};
//const struct fsdata_file file_cgi_tcp[] = {{file_cgi_stats, data_cgi_tcp, data_cgi_tcp + 9, sizeof(data_cgi_tcp) - 9}};
const struct fsdata_file file_img_bg_png[] = {{NULL, data_img_bg_png, data_img_bg_png + 12, sizeof(data_img_bg_png) - 12}};
//new image place here and don't forget to link it with the previously structure
//const struct fsdata_file file_img_logo_gif[] = {{file_img_bg_png, data_img_logo_gif, data_img_logo_gif + 12, sizeof(data_img_logo_gif) - 12}};


//const struct fsdata_file file_about_html[] = {{file_img_bg_png, data_about_html, data_about_html + 12, sizeof(data_about_html) - 12}};
const struct fsdata_file file_control_html[] = {{file_img_bg_png, data_control_html, data_control_html + 14, sizeof(data_control_html) - 14}};
const struct fsdata_file file_404_html[] = {{file_control_html, data_404_html, data_404_html + 10, sizeof(data_404_html) - 10}};
//const struct fsdata_file file_files_footer_plain[] = {{file_404_html, data_files_footer_plain, data_files_footer_plain + 20, sizeof(data_files_footer_plain) - 20}};
//const struct fsdata_file file_files_header_html[] = {{file_files_footer_plain, data_files_header_html, data_files_header_html + 19, sizeof(data_files_header_html) - 19}};
const struct fsdata_file file_media_html[] = {{file_404_html, data_media_html, data_media_html + 12, sizeof(data_media_html) - 12}};

const struct fsdata_file file_index_html[] = {{file_media_html, data_index_html, data_index_html + 12, sizeof(data_index_html) - 12}};
//const struct fsdata_file file_stats_footer_plain[] = {{file_index_html, data_stats_footer_plain, data_stats_footer_plain + 20, sizeof(data_stats_footer_plain) - 20}};
//const struct fsdata_file file_stats_header_html[] = {{file_stats_footer_plain, data_stats_header_html, data_stats_header_html + 19, sizeof(data_stats_header_html) - 19}};
//const struct fsdata_file file_tcp_footer_plain[] = {{file_stats_header_html, data_tcp_footer_plain, data_tcp_footer_plain + 18, sizeof(data_tcp_footer_plain) - 18}};
//const struct fsdata_file file_tcp_header_html[] = {{file_tcp_footer_plain, data_tcp_header_html, data_tcp_header_html + 17, sizeof(data_tcp_header_html) - 17}};




/*-----------------------------------------------------------------------------------*/
static u8_t
fs_strcmp(const char *str1, const char *str2)
{
  u8_t i;
  i = 0;
 loop:

  if(str2[i] == 0 ||
     str1[i] == '\r' || 
     str1[i] == '\n') {
    return 0;
  }

  if(str1[i] != str2[i]) {
    return 1;
  }


  ++i;
  goto loop;
}
/*-----------------------------------------------------------------------------------*/
int
fs_open(const char *name, struct fs_file *file)
{
#ifdef FS_STATISTICS
#if FS_STATISTICS == 1
  u16_t i = 0;
#endif /* FS_STATISTICS */
#endif /* FS_STATISTICS */
  struct fsdata_file_noconst *f;

  for(f = (struct fsdata_file_noconst *)FS_ROOT;
      f != NULL;
      f = (struct fsdata_file_noconst *)f->next) {

    if(fs_strcmp(name, f->name) == 0) {
      file->data = f->data;
      file->len = f->len;
#ifdef FS_STATISTICS
#if FS_STATISTICS == 1
      ++count[i];
#endif /* FS_STATISTICS */
#endif /* FS_STATISTICS */
      return 1;
    }
#ifdef FS_STATISTICS
#if FS_STATISTICS == 1
    ++i;
#endif /* FS_STATISTICS */
#endif /* FS_STATISTICS */

  }
  return 0;
}
/*-----------------------------------------------------------------------------------*/
void
fs_init(void)
{
#ifdef FS_STATISTICS
#if FS_STATISTICS == 1
  u16_t i;
  for(i = 0; i < FS_NUMFILES; i++) {
    count[i] = 0;
  }
#endif /* FS_STATISTICS */
#endif /* FS_STATISTICS */
}
/*-----------------------------------------------------------------------------------*/
#ifdef FS_STATISTICS
#if FS_STATISTICS == 1  
u16_t fs_count
(char *name)
{
  struct fsdata_file_noconst *f;
  u16_t i;

  i = 0;
  for(f = (struct fsdata_file_noconst *)FS_ROOT;
      f != NULL;
      f = (struct fsdata_file_noconst *)f->next) {

    if(fs_strcmp(name, f->name) == 0) {
      return count[i];
    }
    ++i;
  }
  return 0;
}
#endif /* FS_STATISTICS */
#endif /* FS_STATISTICS */
/*-----------------------------------------------------------------------------------*/