Merge pull request #1654 from gebart/pr/lwm2m-json-writer
oma-lwm2m: Add JSON writer
This commit is contained in:
Nicolas Tsiftes
commit
71dcbe0533
4 changed files with 230 additions and 4 deletions
|
|
@ -1,5 +1,13 @@
|
|||
oma-lwm2m_src = lwm2m-object.c lwm2m-engine.c \
|
||||
lwm2m-device.c lwm2m-server.c lwm2m-security.c \
|
||||
oma-tlv.c oma-tlv-reader.c oma-tlv-writer.c \
|
||||
lwm2m-plain-text.c
|
||||
oma-lwm2m_src = \
|
||||
lwm2m-object.c \
|
||||
lwm2m-engine.c \
|
||||
lwm2m-device.c \
|
||||
lwm2m-server.c \
|
||||
lwm2m-security.c \
|
||||
oma-tlv.c \
|
||||
oma-tlv-reader.c \
|
||||
oma-tlv-writer.c \
|
||||
lwm2m-plain-text.c \
|
||||
lwm2m-json.c \
|
||||
#
|
||||
CFLAGS += -DHAVE_OMA_LWM2M=1
|
||||
|
|
|
|||
|
|
@ -46,6 +46,7 @@
|
|||
#include "lwm2m-object.h"
|
||||
#include "lwm2m-device.h"
|
||||
#include "lwm2m-plain-text.h"
|
||||
#include "lwm2m-json.h"
|
||||
#include "rest-engine.h"
|
||||
#include "er-coap-constants.h"
|
||||
#include "er-coap-engine.h"
|
||||
|
|
@ -727,6 +728,10 @@ lwm2m_engine_select_writer(lwm2m_context_t *context, unsigned int accept)
|
|||
case TEXT_PLAIN:
|
||||
context->writer = &lwm2m_plain_text_writer;
|
||||
break;
|
||||
case LWM2M_JSON:
|
||||
case APPLICATION_JSON:
|
||||
context->writer = &lwm2m_json_writer;
|
||||
break;
|
||||
default:
|
||||
PRINTF("Unknown Accept type %u, using LWM2M plain text\n", accept);
|
||||
context->writer = &lwm2m_plain_text_writer;
|
||||
|
|
|
|||
162
apps/oma-lwm2m/lwm2m-json.c
Normal file
162
apps/oma-lwm2m/lwm2m-json.c
Normal file
|
|
@ -0,0 +1,162 @@
|
|||
/*
|
||||
* Copyright (c) 2016, Eistec AB.
|
||||
* 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 copyright holder 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 COPYRIGHT HOLDER 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
|
||||
* COPYRIGHT HOLDER 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.
|
||||
*/
|
||||
|
||||
/**
|
||||
* \addtogroup oma-lwm2m
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \file
|
||||
* Implementation of the Contiki OMA LWM2M JSON writer
|
||||
* \author
|
||||
* Joakim Nohlgård <joakim.nohlgard@eistec.se>
|
||||
*/
|
||||
|
||||
#include "lwm2m-object.h"
|
||||
#include "lwm2m-json.h"
|
||||
#include "lwm2m-plain-text.h"
|
||||
#include <stdio.h>
|
||||
#include <stddef.h>
|
||||
#include <stdint.h>
|
||||
#include <inttypes.h>
|
||||
|
||||
#define DEBUG 0
|
||||
#if DEBUG
|
||||
#define PRINTF(...) printf(__VA_ARGS__)
|
||||
#else
|
||||
#define PRINTF(...)
|
||||
#endif
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static size_t
|
||||
write_boolean(const lwm2m_context_t *ctx, uint8_t *outbuf, size_t outlen,
|
||||
int value)
|
||||
{
|
||||
int len = snprintf((char *)outbuf, outlen, "{\"e\":[{\"n\":\"%u\",\"bv\":%s}]}\n", ctx->resource_id, value ? "true" : "false");
|
||||
if((len < 0) || (len >= outlen)) {
|
||||
return 0;
|
||||
}
|
||||
return len;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static size_t
|
||||
write_int(const lwm2m_context_t *ctx, uint8_t *outbuf, size_t outlen,
|
||||
int32_t value)
|
||||
{
|
||||
int len = snprintf((char *)outbuf, outlen, "{\"e\":[{\"n\":\"%u\",\"v\":%" PRId32 "}]}\n", ctx->resource_id, value);
|
||||
if((len < 0) || (len >= outlen)) {
|
||||
return 0;
|
||||
}
|
||||
return len;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static size_t
|
||||
write_float32fix(const lwm2m_context_t *ctx, uint8_t *outbuf, size_t outlen,
|
||||
int32_t value, int bits)
|
||||
{
|
||||
size_t len = 0;
|
||||
int res;
|
||||
res = snprintf((char *)outbuf, outlen, "{\"e\":[{\"n\":\"%u\",\"v\":", ctx->resource_id);
|
||||
if(res <= 0 || res >= outlen) {
|
||||
return 0;
|
||||
}
|
||||
len += res;
|
||||
outlen -= res;
|
||||
res = lwm2m_plain_text_write_float32fix(&outbuf[len], outlen, value, bits);
|
||||
if((res <= 0) || (res >= outlen)) {
|
||||
return 0;
|
||||
}
|
||||
len += res;
|
||||
outlen -= res;
|
||||
res = snprintf((char *)&outbuf[len], outlen, "}]}\n");
|
||||
if((res <= 0) || (res >= outlen)) {
|
||||
return 0;
|
||||
}
|
||||
len += res;
|
||||
return len;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static size_t
|
||||
write_string(const lwm2m_context_t *ctx, uint8_t *outbuf, size_t outlen,
|
||||
const char *value, size_t stringlen)
|
||||
{
|
||||
size_t i;
|
||||
size_t len = 0;
|
||||
int res;
|
||||
PRINTF("{\"e\":[{\"n\":\"%u\",\"sv\":\"", ctx->resource_id);
|
||||
res = snprintf((char *)outbuf, outlen, "{\"e\":[{\"n\":\"%u\",\"sv\":\"", ctx->resource_id);
|
||||
if(res < 0 || res >= outlen) {
|
||||
return 0;
|
||||
}
|
||||
len += res;
|
||||
for (i = 0; i < stringlen && len < outlen; ++i) {
|
||||
/* Escape special characters */
|
||||
/* TODO: Handle UTF-8 strings */
|
||||
if(value[i] < '\x20') {
|
||||
PRINTF("\\x%x", value[i]);
|
||||
res = snprintf((char *)&outbuf[len], outlen - len, "\\x%x", value[i]);
|
||||
if((res < 0) || (res >= (outlen - len))) {
|
||||
return 0;
|
||||
}
|
||||
len += res;
|
||||
continue;
|
||||
} else if(value[i] == '"' || value[i] == '\\') {
|
||||
PRINTF("\\");
|
||||
outbuf[len] = '\\';
|
||||
++len;
|
||||
if(len >= outlen) {
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
PRINTF("%c", value[i]);
|
||||
outbuf[len] = value[i];
|
||||
++len;
|
||||
if(len >= outlen) {
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
PRINTF("\"}]}\n");
|
||||
res = snprintf((char *)&outbuf[len], outlen - len, "\"}]}\n");
|
||||
if((res < 0) || (res >= (outlen - len))) {
|
||||
return 0;
|
||||
}
|
||||
len += res;
|
||||
return len;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
const lwm2m_writer_t lwm2m_json_writer = {
|
||||
write_int,
|
||||
write_string,
|
||||
write_float32fix,
|
||||
write_boolean
|
||||
};
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/** @} */
|
||||
51
apps/oma-lwm2m/lwm2m-json.h
Normal file
51
apps/oma-lwm2m/lwm2m-json.h
Normal file
|
|
@ -0,0 +1,51 @@
|
|||
/*
|
||||
* Copyright (c) 2016, Eistec AB.
|
||||
* 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 copyright holder 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 COPYRIGHT HOLDER 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
|
||||
* COPYRIGHT HOLDER 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.
|
||||
*/
|
||||
|
||||
/**
|
||||
* \addtogroup oma-lwm2m
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \file
|
||||
* Header file for the Contiki OMA LWM2M JSON writer
|
||||
* \author
|
||||
* Joakim Nohlgård <joakim.nohlgard@eistec.se>
|
||||
*/
|
||||
|
||||
#ifndef LWM2M_JSON_H_
|
||||
#define LWM2M_JSON_H_
|
||||
|
||||
#include "lwm2m-object.h"
|
||||
|
||||
extern const lwm2m_writer_t lwm2m_json_writer;
|
||||
|
||||
#endif /* LWM2M_JSON_H_ */
|
||||
/** @} */
|
||||
Loading…
Reference in a new issue