| /* |
| * Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich |
| * 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 Contiki operating system. |
| */ |
| |
| /** |
| * \file |
| * ETSI Plugtest resource |
| * \author |
| * Matthias Kovatsch <kovatsch@inf.ethz.ch> |
| */ |
| |
| #include <string.h> |
| #include "rest-engine.h" |
| #include "er-coap.h" |
| #include "er-plugtest.h" |
| |
| static void res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset); |
| |
| RESOURCE(res_plugtest_large, |
| "title=\"Large resource\";rt=\"block\";sz=\"" TO_STRING(CHUNKS_TOTAL) "\"", |
| res_get_handler, |
| NULL, |
| NULL, |
| NULL); |
| |
| static void |
| res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset) |
| { |
| int32_t strpos = 0; |
| |
| /* Check the offset for boundaries of the resource data. */ |
| if(*offset >= CHUNKS_TOTAL) { |
| REST.set_response_status(response, REST.status.BAD_OPTION); |
| /* A block error message should not exceed the minimum block size (16). */ |
| |
| const char *error_msg = "BlockOutOfScope"; |
| REST.set_response_payload(response, error_msg, strlen(error_msg)); |
| return; |
| } |
| |
| /* Generate data until reaching CHUNKS_TOTAL. */ |
| while(strpos < preferred_size) { |
| strpos += snprintf((char *)buffer + strpos, preferred_size - strpos + 1, |
| "|%ld|", *offset); |
| } |
| |
| /* snprintf() does not adjust return value if truncated by size. */ |
| if(strpos > preferred_size) { |
| strpos = preferred_size; |
| /* Truncate if above CHUNKS_TOTAL bytes. */ |
| } |
| if(*offset + (int32_t)strpos > CHUNKS_TOTAL) { |
| strpos = CHUNKS_TOTAL - *offset; |
| } |
| REST.set_response_payload(response, buffer, strpos); |
| REST.set_header_content_type(response, REST.type.TEXT_PLAIN); |
| |
| /* IMPORTANT for chunk-wise resources: Signal chunk awareness to REST engine. */ |
| *offset += strpos; |
| |
| /* Signal end of resource representation. */ |
| if(*offset >= CHUNKS_TOTAL) { |
| *offset = -1; |
| } |
| } |