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
49 int fs_open_custom(struct fs_file *file, const char *name);
50 void fs_close_custom(struct fs_file *file);
51 #if LWIP_HTTPD_FS_ASYNC_READ
52 u8_t fs_canread_custom(struct fs_file *file);
53 u8_t fs_wait_read_custom(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg);
54 int 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 */
56 int 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 /*-----------------------------------------------------------------------------------*/
61 err_t
fs_open(struct fs_file * file,const char * name)62 fs_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 /*-----------------------------------------------------------------------------------*/
100 void
fs_close(struct fs_file * file)101 fs_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
116 int
fs_read_async(struct fs_file * file,char * buffer,int count,fs_wait_cb callback_fn,void * callback_arg)117 fs_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 */
119 int
120 fs_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
154 int
fs_is_file_ready(struct fs_file * file,fs_wait_cb callback_fn,void * callback_arg)155 fs_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 /*-----------------------------------------------------------------------------------*/
175 int
fs_bytes_left(struct fs_file * file)176 fs_bytes_left(struct fs_file *file)
177 {
178 return file->len - file->index;
179 }
180