112 lines
4.3 KiB
C
112 lines
4.3 KiB
C
/*
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* Copyright (c) 2014, Lars Schmertmann <SmallLars@t-online.de>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*/
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/**
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* \file
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* Example resource
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* \author
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* Lars Schmertmann <SmallLars@t-online.de>
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*/
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#include <string.h>
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#include "rest-engine.h"
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#include "er-coap-block1.h"
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#include "er-coap-separate.h"
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#include "er-coap-transactions.h"
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static void res_post_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
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SEPARATE_RESOURCE(res_b1_sep_b2, "title=\"Block1 + Separate + Block2 demo\"", NULL, res_post_handler, NULL, NULL, NULL);
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#define MAX_DATA_LEN 256
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static uint8_t big_msg[MAX_DATA_LEN];
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static size_t big_msg_len = 0;
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static coap_separate_t request_metadata;
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static void
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res_post_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
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{
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/* Example allows only one request on time. There are no checks for multiply access !!! */
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if(*offset == 0) {
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/* Incoming Data */
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if(coap_block1_handler(request, response, big_msg, &big_msg_len, MAX_DATA_LEN)) {
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/* More Blocks will follow. Example waits for
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* the last block and stores data into big_msg.
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*/
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return;
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}
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/* Last block was received. */
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coap_separate_accept(request, &request_metadata);
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/* Need Time for calculation now */
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unsigned i;
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for(i = 0; i <= 4096; i++) {
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printf("\r%4u\r", i);
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}
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printf("\n");
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/* Send first block */
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coap_transaction_t *transaction = NULL;
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if((transaction = coap_new_transaction(request_metadata.mid, &request_metadata.addr, request_metadata.port))) {
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coap_packet_t resp[1]; /* This way the packet can be treated as pointer as usual. */
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/* Restore the request information for the response. */
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coap_separate_resume(resp, &request_metadata, CONTENT_2_05);
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/* Set payload and block info */
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coap_set_payload(resp, big_msg, big_msg_len > request_metadata.block2_size ? request_metadata.block2_size : big_msg_len);
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if(big_msg_len > request_metadata.block2_size) {
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coap_set_header_block2(resp, 0, 1, request_metadata.block2_size);
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}
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/* Warning: No check for serialization error. */
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transaction->packet_len = coap_serialize_message(resp, transaction->packet);
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coap_send_transaction(transaction);
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}
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} else {
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/* request for more blocks */
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if(*offset >= big_msg_len) {
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coap_set_status_code(response, BAD_OPTION_4_02);
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coap_set_payload(response, "BlockOutOfScope", 15);
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return;
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}
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memcpy(buffer, big_msg + *offset, 32);
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if(big_msg_len - *offset < preferred_size) {
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preferred_size = big_msg_len - *offset;
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*offset = -1;
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} else {
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*offset += preferred_size;
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}
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coap_set_payload(response, buffer, preferred_size);
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}
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}
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