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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2022 The Fluent Bit Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define _GNU_SOURCE
#include <time.h>
#include <fluent-bit/flb_parser.h>
#include <fluent-bit/flb_pack.h>
#include <fluent-bit/flb_mem.h>
#include <fluent-bit/flb_parser_decoder.h>
int flb_parser_json_do(struct flb_parser *parser,
const char *in_buf, size_t in_size,
void **out_buf, size_t *out_size,
struct flb_time *out_time)
{
int i;
int skip;
int ret;
int slen;
int root_type;
int records;
double tmfrac = 0;
char *mp_buf = NULL;
char *time_key;
char *tmp_out_buf = NULL;
char tmp[255];
size_t tmp_out_size = 0;
size_t off = 0;
size_t map_size;
size_t mp_size;
size_t len;
msgpack_sbuffer mp_sbuf;
msgpack_packer mp_pck;
msgpack_unpacked result;
msgpack_object map;
msgpack_object *k = NULL;
msgpack_object *v = NULL;
time_t time_lookup;
struct flb_tm tm = {0};
struct flb_time *t;
size_t consumed;
consumed = 0;
/* Convert incoming in_buf JSON message to message pack format */
ret = flb_pack_json_recs(in_buf, in_size, &mp_buf, &mp_size, &root_type,
&records, &consumed);
if (ret != 0) {
return -1;
}
if (records != 1) {
flb_free(mp_buf);
return -1;
}
/* Make sure object is a map */
msgpack_unpacked_init(&result);
if (msgpack_unpack_next(&result, mp_buf, mp_size, &off) == MSGPACK_UNPACK_SUCCESS) {
map = result.data;
if (map.type != MSGPACK_OBJECT_MAP) {
flb_free(mp_buf);
msgpack_unpacked_destroy(&result);
return -1;
}
}
else {
if (mp_size > 0) {
flb_free(mp_buf);
}
msgpack_unpacked_destroy(&result);
return -1;
}
/* Export results (might change later) */
tmp_out_buf = mp_buf;
tmp_out_size = mp_size;
/* Do we have some decoders set ? */
if (parser->decoders) {
ret = flb_parser_decoder_do(parser->decoders,
mp_buf, mp_size,
&tmp_out_buf, &tmp_out_size);
if (ret == 0) {
/* re-process the unpack context */
off = 0;
msgpack_unpacked_destroy(&result);
msgpack_unpacked_init(&result);
msgpack_unpack_next(&result, tmp_out_buf, tmp_out_size, &off);
map = result.data;
}
}
/* Set the possible outgoing buffer */
*out_buf = tmp_out_buf;
*out_size = tmp_out_size;
if (mp_buf != tmp_out_buf) {
flb_free(mp_buf);
mp_buf = NULL;
}
/* Do time resolution ? */
if (!parser->time_fmt) {
msgpack_unpacked_destroy(&result);
return (int) consumed;
}
if (parser->time_key) {
time_key = parser->time_key;
}
else {
time_key = "time";
}
slen = strlen(time_key);
/* Lookup time field */
map_size = map.via.map.size;
skip = map_size;
for (i = 0; i < map_size; i++) {
k = &map.via.map.ptr[i].key;
v = &map.via.map.ptr[i].val;
if (k->via.str.size != slen) {
continue;
}
/* Ensure the pointer we are about to read is not NULL */
if (k->via.str.ptr == NULL) {
if (mp_buf == tmp_out_buf) {
flb_free(mp_buf);
}
else {
flb_free(mp_buf);
flb_free(tmp_out_buf);
}
*out_buf = NULL;
msgpack_unpacked_destroy(&result);
return -1;
}
if (strncmp(k->via.str.ptr, time_key, k->via.str.size) == 0) {
/* We found the key, break the loop and keep the index */
if (parser->time_keep == FLB_FALSE) {
skip = i;
break;
}
else {
skip = -1;
}
break;
}
k = NULL;
v = NULL;
}
/* No time_key field found */
if (i >= map_size || !k || !v) {
msgpack_unpacked_destroy(&result);
return (int) consumed;
}
/* Ensure we have an accurate type */
if (v->type != MSGPACK_OBJECT_STR) {
msgpack_unpacked_destroy(&result);
return (int) consumed;
}
/* Lookup time */
ret = flb_parser_time_lookup(v->via.str.ptr, v->via.str.size,
0, parser, &tm, &tmfrac);
if (ret == -1) {
len = v->via.str.size;
if (len > sizeof(tmp) - 1) {
len = sizeof(tmp) - 1;
}
memcpy(tmp, v->via.str.ptr, len);
tmp[len] = '\0';
flb_warn("[parser:%s] invalid time format %s for '%s'",
parser->name, parser->time_fmt_full, tmp);
time_lookup = 0;
skip = map_size;
}
else {
time_lookup = flb_parser_tm2time(&tm);
}
/* Compose a new map without the time_key field */
msgpack_sbuffer_init(&mp_sbuf);
msgpack_packer_init(&mp_pck, &mp_sbuf, msgpack_sbuffer_write);
if (parser->time_keep == FLB_FALSE && skip < map_size) {
msgpack_pack_map(&mp_pck, map_size - 1);
}
else {
msgpack_pack_map(&mp_pck, map_size);
}
for (i = 0; i < map_size; i++) {
if (i == skip) {
continue;
}
msgpack_pack_object(&mp_pck, map.via.map.ptr[i].key);
msgpack_pack_object(&mp_pck, map.via.map.ptr[i].val);
}
/* Export the proper buffer */
flb_free(tmp_out_buf);
*out_buf = mp_sbuf.data;
*out_size = mp_sbuf.size;
t = out_time;
t->tm.tv_sec = time_lookup;
t->tm.tv_nsec = (tmfrac * 1000000000);
msgpack_unpacked_destroy(&result);
return (int) consumed;
}
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