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 <string.h> 37 38 39 #include HTTPD_FSDATA_FILE 40 41 /*-----------------------------------------------------------------------------------*/ 42 43 #if LWIP_HTTPD_CUSTOM_FILES 44 int fs_open_custom(struct fs_file *file, const char *name); 45 void fs_close_custom(struct fs_file *file); 46 #if LWIP_HTTPD_FS_ASYNC_READ 47 u8_t fs_canread_custom(struct fs_file *file); 48 u8_t fs_wait_read_custom(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg); 49 int fs_read_async_custom(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg); 50 #else /* LWIP_HTTPD_FS_ASYNC_READ */ 51 int fs_read_custom(struct fs_file *file, char *buffer, int count); 52 #endif /* LWIP_HTTPD_FS_ASYNC_READ */ 53 #endif /* LWIP_HTTPD_CUSTOM_FILES */ 54 55 /*-----------------------------------------------------------------------------------*/ 56 err_t 57 fs_open(struct fs_file *file, const char *name) 58 { 59 const struct fsdata_file *f; 60 61 if ((file == NULL) || (name == NULL)) { 62 return ERR_ARG; 63 } 64 65 #if LWIP_HTTPD_CUSTOM_FILES 66 if (fs_open_custom(file, name)) { 67 file->is_custom_file = 1; 68 return ERR_OK; 69 } 70 file->is_custom_file = 0; 71 #endif /* LWIP_HTTPD_CUSTOM_FILES */ 72 73 for (f = FS_ROOT; f != NULL; f = f->next) { 74 if (!strcmp(name, (const char *)f->name)) { 75 file->data = (const char *)f->data; 76 file->len = f->len; 77 file->index = f->len; 78 file->pextension = NULL; 79 file->flags = f->flags; 80 #if HTTPD_PRECALCULATED_CHECKSUM 81 file->chksum_count = f->chksum_count; 82 file->chksum = f->chksum; 83 #endif /* HTTPD_PRECALCULATED_CHECKSUM */ 84 #if LWIP_HTTPD_FILE_STATE 85 file->state = fs_state_init(file, name); 86 #endif /* #if LWIP_HTTPD_FILE_STATE */ 87 return ERR_OK; 88 } 89 } 90 /* file not found */ 91 return ERR_VAL; 92 } 93 94 /*-----------------------------------------------------------------------------------*/ 95 void 96 fs_close(struct fs_file *file) 97 { 98 #if LWIP_HTTPD_CUSTOM_FILES 99 if (file->is_custom_file) { 100 fs_close_custom(file); 101 } 102 #endif /* LWIP_HTTPD_CUSTOM_FILES */ 103 #if LWIP_HTTPD_FILE_STATE 104 fs_state_free(file, file->state); 105 #endif /* #if LWIP_HTTPD_FILE_STATE */ 106 LWIP_UNUSED_ARG(file); 107 } 108 /*-----------------------------------------------------------------------------------*/ 109 #if LWIP_HTTPD_DYNAMIC_FILE_READ 110 #if LWIP_HTTPD_FS_ASYNC_READ 111 int 112 fs_read_async(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg) 113 #else /* LWIP_HTTPD_FS_ASYNC_READ */ 114 int 115 fs_read(struct fs_file *file, char *buffer, int count) 116 #endif /* LWIP_HTTPD_FS_ASYNC_READ */ 117 { 118 int read; 119 if(file->index == file->len) { 120 return FS_READ_EOF; 121 } 122 #if LWIP_HTTPD_FS_ASYNC_READ 123 LWIP_UNUSED_ARG(callback_fn); 124 LWIP_UNUSED_ARG(callback_arg); 125 #endif /* LWIP_HTTPD_FS_ASYNC_READ */ 126 #if LWIP_HTTPD_CUSTOM_FILES 127 if (file->is_custom_file) { 128 #if LWIP_HTTPD_FS_ASYNC_READ 129 return fs_read_async_custom(file, buffer, count, callback_fn, callback_arg); 130 #else /* LWIP_HTTPD_FS_ASYNC_READ */ 131 return fs_read_custom(file, buffer, count); 132 #endif /* LWIP_HTTPD_FS_ASYNC_READ */ 133 } 134 #endif /* LWIP_HTTPD_CUSTOM_FILES */ 135 136 read = file->len - file->index; 137 if(read > count) { 138 read = count; 139 } 140 141 MEMCPY(buffer, (file->data + file->index), read); 142 file->index += read; 143 144 return(read); 145 } 146 #endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */ 147 /*-----------------------------------------------------------------------------------*/ 148 #if LWIP_HTTPD_FS_ASYNC_READ 149 int 150 fs_is_file_ready(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg) 151 { 152 if (file != NULL) { 153 #if LWIP_HTTPD_FS_ASYNC_READ 154 #if LWIP_HTTPD_CUSTOM_FILES 155 if (!fs_canread_custom(file)) { 156 if (fs_wait_read_custom(file, callback_fn, callback_arg)) { 157 return 0; 158 } 159 } 160 #else /* LWIP_HTTPD_CUSTOM_FILES */ 161 LWIP_UNUSED_ARG(callback_fn); 162 LWIP_UNUSED_ARG(callback_arg); 163 #endif /* LWIP_HTTPD_CUSTOM_FILES */ 164 #endif /* LWIP_HTTPD_FS_ASYNC_READ */ 165 } 166 return 1; 167 } 168 #endif /* LWIP_HTTPD_FS_ASYNC_READ */ 169 /*-----------------------------------------------------------------------------------*/ 170 int 171 fs_bytes_left(struct fs_file *file) 172 { 173 return file->len - file->index; 174 } 175