[457] | 1 | /*
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| 2 | * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without modification,
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| 6 | * are permitted provided that the following conditions are met:
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| 7 | *
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| 8 | * 1. Redistributions of source code must retain the above copyright notice,
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| 9 | * this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 11 | * this list of conditions and the following disclaimer in the documentation
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| 12 | * and/or other materials provided with the distribution.
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| 13 | * 3. The name of the author may not be used to endorse or promote products
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| 14 | * derived from this software without specific prior written permission.
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| 15 | *
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| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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| 19 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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| 21 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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| 24 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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| 25 | * OF SUCH DAMAGE.
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| 26 | *
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| 27 | * This file is part of the lwIP TCP/IP stack.
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| 28 | *
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| 29 | * Author: Adam Dunkels <adam@sics.se>
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| 30 | *
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| 31 | */
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| 32 |
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| 33 | #include "lwip/apps/httpd_opts.h"
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| 34 | #include "lwip/def.h"
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| 35 | #include "lwip/apps/fs.h"
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| 36 | #include <string.h>
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| 37 |
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| 38 |
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| 39 | #include HTTPD_FSDATA_FILE
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| 40 |
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| 41 | /*-----------------------------------------------------------------------------------*/
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| 42 |
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| 43 | #if LWIP_HTTPD_CUSTOM_FILES
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| 44 | int fs_open_custom(struct fs_file *file, const char *name);
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| 45 | void fs_close_custom(struct fs_file *file);
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| 46 | #if LWIP_HTTPD_FS_ASYNC_READ
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| 47 | u8_t fs_canread_custom(struct fs_file *file);
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| 48 | u8_t fs_wait_read_custom(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg);
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| 49 | int fs_read_async_custom(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg);
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| 50 | #else /* LWIP_HTTPD_FS_ASYNC_READ */
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| 51 | int fs_read_custom(struct fs_file *file, char *buffer, int count);
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| 52 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
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| 53 | #endif /* LWIP_HTTPD_CUSTOM_FILES */
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| 54 |
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| 55 | /*-----------------------------------------------------------------------------------*/
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| 56 | err_t
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| 57 | fs_open(struct fs_file *file, const char *name)
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| 58 | {
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| 59 | const struct fsdata_file *f;
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| 60 |
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| 61 | if ((file == NULL) || (name == NULL)) {
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| 62 | return ERR_ARG;
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| 63 | }
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| 64 |
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| 65 | #if LWIP_HTTPD_CUSTOM_FILES
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| 66 | if (fs_open_custom(file, name)) {
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| 67 | file->is_custom_file = 1;
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| 68 | return ERR_OK;
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| 69 | }
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| 70 | file->is_custom_file = 0;
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| 71 | #endif /* LWIP_HTTPD_CUSTOM_FILES */
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| 72 |
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| 73 | for (f = FS_ROOT; f != NULL; f = f->next) {
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| 74 | if (!strcmp(name, (const char *)f->name)) {
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| 75 | file->data = (const char *)f->data;
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| 76 | file->len = f->len;
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| 77 | file->index = f->len;
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| 78 | file->pextension = NULL;
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| 79 | file->flags = f->flags;
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| 80 | #if HTTPD_PRECALCULATED_CHECKSUM
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| 81 | file->chksum_count = f->chksum_count;
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| 82 | file->chksum = f->chksum;
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| 83 | #endif /* HTTPD_PRECALCULATED_CHECKSUM */
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| 84 | #if LWIP_HTTPD_FILE_STATE
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| 85 | file->state = fs_state_init(file, name);
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| 86 | #endif /* #if LWIP_HTTPD_FILE_STATE */
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| 87 | return ERR_OK;
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| 88 | }
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| 89 | }
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| 90 | /* file not found */
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| 91 | return ERR_VAL;
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| 92 | }
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| 93 |
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| 94 | /*-----------------------------------------------------------------------------------*/
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| 95 | void
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| 96 | fs_close(struct fs_file *file)
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| 97 | {
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| 98 | #if LWIP_HTTPD_CUSTOM_FILES
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| 99 | if (file->is_custom_file) {
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| 100 | fs_close_custom(file);
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| 101 | }
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| 102 | #endif /* LWIP_HTTPD_CUSTOM_FILES */
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| 103 | #if LWIP_HTTPD_FILE_STATE
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| 104 | fs_state_free(file, file->state);
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| 105 | #endif /* #if LWIP_HTTPD_FILE_STATE */
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| 106 | LWIP_UNUSED_ARG(file);
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| 107 | }
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| 108 | /*-----------------------------------------------------------------------------------*/
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| 109 | #if LWIP_HTTPD_DYNAMIC_FILE_READ
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| 110 | #if LWIP_HTTPD_FS_ASYNC_READ
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| 111 | int
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| 112 | fs_read_async(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg)
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| 113 | #else /* LWIP_HTTPD_FS_ASYNC_READ */
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| 114 | int
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| 115 | fs_read(struct fs_file *file, char *buffer, int count)
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| 116 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
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| 117 | {
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| 118 | int read;
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| 119 | if (file->index == file->len) {
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| 120 | return FS_READ_EOF;
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| 121 | }
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| 122 | #if LWIP_HTTPD_FS_ASYNC_READ
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| 123 | LWIP_UNUSED_ARG(callback_fn);
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| 124 | LWIP_UNUSED_ARG(callback_arg);
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| 125 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
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| 126 | #if LWIP_HTTPD_CUSTOM_FILES
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| 127 | if (file->is_custom_file) {
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| 128 | #if LWIP_HTTPD_FS_ASYNC_READ
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| 129 | return fs_read_async_custom(file, buffer, count, callback_fn, callback_arg);
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| 130 | #else /* LWIP_HTTPD_FS_ASYNC_READ */
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| 131 | return fs_read_custom(file, buffer, count);
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| 132 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
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| 133 | }
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| 134 | #endif /* LWIP_HTTPD_CUSTOM_FILES */
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| 135 |
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| 136 | read = file->len - file->index;
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| 137 | if (read > count) {
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| 138 | read = count;
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| 139 | }
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| 140 |
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| 141 | MEMCPY(buffer, (file->data + file->index), read);
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| 142 | file->index += read;
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| 143 |
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| 144 | return (read);
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| 145 | }
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| 146 | #endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */
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| 147 | /*-----------------------------------------------------------------------------------*/
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| 148 | #if LWIP_HTTPD_FS_ASYNC_READ
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| 149 | int
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| 150 | fs_is_file_ready(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg)
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| 151 | {
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| 152 | if (file != NULL) {
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| 153 | #if LWIP_HTTPD_FS_ASYNC_READ
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| 154 | #if LWIP_HTTPD_CUSTOM_FILES
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| 155 | if (!fs_canread_custom(file)) {
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| 156 | if (fs_wait_read_custom(file, callback_fn, callback_arg)) {
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| 157 | return 0;
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| 158 | }
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| 159 | }
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| 160 | #else /* LWIP_HTTPD_CUSTOM_FILES */
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| 161 | LWIP_UNUSED_ARG(callback_fn);
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| 162 | LWIP_UNUSED_ARG(callback_arg);
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| 163 | #endif /* LWIP_HTTPD_CUSTOM_FILES */
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| 164 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
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| 165 | }
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| 166 | return 1;
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| 167 | }
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| 168 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
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| 169 | /*-----------------------------------------------------------------------------------*/
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| 170 | int
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| 171 | fs_bytes_left(struct fs_file *file)
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| 172 | {
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| 173 | return file->len - file->index;
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| 174 | }
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