1/*
2 * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 *    this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 *    this list of conditions and the following disclaimer in the documentation
12 *    and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
25 * OF SUCH DAMAGE.
26 *
27 * This file is part of the lwIP TCP/IP stack.
28 *
29 * Author: Adam Dunkels <adam@sics.se>
30 *
31 */
32
33#include "lwip/apps/httpd_opts.h"
34#include "lwip/def.h"
35#include "lwip/apps/fs.h"
36#include "fsdata.h"
37#include <string.h>
38
39
40#if HTTPD_USE_CUSTOM_FSDATA
41#include "fsdata_custom.c"
42#else /* HTTPD_USE_CUSTOM_FSDATA */
43#include "fsdata.c"
44#endif /* HTTPD_USE_CUSTOM_FSDATA */
45
46/*-----------------------------------------------------------------------------------*/
47
48#if LWIP_HTTPD_CUSTOM_FILES
49int fs_open_custom(struct fs_file *file, const char *name);
50void fs_close_custom(struct fs_file *file);
51#if LWIP_HTTPD_FS_ASYNC_READ
52u8_t fs_canread_custom(struct fs_file *file);
53u8_t fs_wait_read_custom(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg);
54int fs_read_async_custom(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg);
55#else /* LWIP_HTTPD_FS_ASYNC_READ */
56int fs_read_custom(struct fs_file *file, char *buffer, int count);
57#endif /* LWIP_HTTPD_FS_ASYNC_READ */
58#endif /* LWIP_HTTPD_CUSTOM_FILES */
59
60/*-----------------------------------------------------------------------------------*/
61err_t
62fs_open(struct fs_file *file, const char *name)
63{
64  const struct fsdata_file *f;
65
66  if ((file == NULL) || (name == NULL)) {
67     return ERR_ARG;
68  }
69
70#if LWIP_HTTPD_CUSTOM_FILES
71  if (fs_open_custom(file, name)) {
72    file->is_custom_file = 1;
73    return ERR_OK;
74  }
75  file->is_custom_file = 0;
76#endif /* LWIP_HTTPD_CUSTOM_FILES */
77
78  for (f = FS_ROOT; f != NULL; f = f->next) {
79    if (!strcmp(name, (const char *)f->name)) {
80      file->data = (const char *)f->data;
81      file->len = f->len;
82      file->index = f->len;
83      file->pextension = NULL;
84      file->flags = f->flags;
85#if HTTPD_PRECALCULATED_CHECKSUM
86      file->chksum_count = f->chksum_count;
87      file->chksum = f->chksum;
88#endif /* HTTPD_PRECALCULATED_CHECKSUM */
89#if LWIP_HTTPD_FILE_STATE
90      file->state = fs_state_init(file, name);
91#endif /* #if LWIP_HTTPD_FILE_STATE */
92      return ERR_OK;
93    }
94  }
95  /* file not found */
96  return ERR_VAL;
97}
98
99/*-----------------------------------------------------------------------------------*/
100void
101fs_close(struct fs_file *file)
102{
103#if LWIP_HTTPD_CUSTOM_FILES
104  if (file->is_custom_file) {
105    fs_close_custom(file);
106  }
107#endif /* LWIP_HTTPD_CUSTOM_FILES */
108#if LWIP_HTTPD_FILE_STATE
109  fs_state_free(file, file->state);
110#endif /* #if LWIP_HTTPD_FILE_STATE */
111  LWIP_UNUSED_ARG(file);
112}
113/*-----------------------------------------------------------------------------------*/
114#if LWIP_HTTPD_DYNAMIC_FILE_READ
115#if LWIP_HTTPD_FS_ASYNC_READ
116int
117fs_read_async(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg)
118#else /* LWIP_HTTPD_FS_ASYNC_READ */
119int
120fs_read(struct fs_file *file, char *buffer, int count)
121#endif /* LWIP_HTTPD_FS_ASYNC_READ */
122{
123  int read;
124  if(file->index == file->len) {
125    return FS_READ_EOF;
126  }
127#if LWIP_HTTPD_FS_ASYNC_READ
128  LWIP_UNUSED_ARG(callback_fn);
129  LWIP_UNUSED_ARG(callback_arg);
130#endif /* LWIP_HTTPD_FS_ASYNC_READ */
131#if LWIP_HTTPD_CUSTOM_FILES
132  if (file->is_custom_file) {
133#if LWIP_HTTPD_FS_ASYNC_READ
134    return fs_read_async_custom(file, buffer, count, callback_fn, callback_arg);
135#else /* LWIP_HTTPD_FS_ASYNC_READ */
136    return fs_read_custom(file, buffer, count);
137#endif /* LWIP_HTTPD_FS_ASYNC_READ */
138  }
139#endif /* LWIP_HTTPD_CUSTOM_FILES */
140
141  read = file->len - file->index;
142  if(read > count) {
143    read = count;
144  }
145
146  MEMCPY(buffer, (file->data + file->index), read);
147  file->index += read;
148
149  return(read);
150}
151#endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */
152/*-----------------------------------------------------------------------------------*/
153#if LWIP_HTTPD_FS_ASYNC_READ
154int
155fs_is_file_ready(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg)
156{
157  if (file != NULL) {
158#if LWIP_HTTPD_FS_ASYNC_READ
159#if LWIP_HTTPD_CUSTOM_FILES
160    if (!fs_canread_custom(file)) {
161      if (fs_wait_read_custom(file, callback_fn, callback_arg)) {
162        return 0;
163      }
164    }
165#else /* LWIP_HTTPD_CUSTOM_FILES */
166    LWIP_UNUSED_ARG(callback_fn);
167    LWIP_UNUSED_ARG(callback_arg);
168#endif /* LWIP_HTTPD_CUSTOM_FILES */
169#endif /* LWIP_HTTPD_FS_ASYNC_READ */
170  }
171  return 1;
172}
173#endif /* LWIP_HTTPD_FS_ASYNC_READ */
174/*-----------------------------------------------------------------------------------*/
175int
176fs_bytes_left(struct fs_file *file)
177{
178  return file->len - file->index;
179}
180