int main(void)
{
struct json *reply, *item1, *item2, *params;
struct jrpc_client *client = &my_client;
int ret = jrpc_client_init(client, HOST, PORT);
if (ret != 0) {
exit(ret);
}
item1 = json_create_object();
json_add_number_to_object(item1, "A", 3);
json_add_number_to_object(item1, "B", 10);
item2 = json_create_object();
json_add_number_to_object(item2, "A", 1);
json_add_number_to_object(item2, "B", 2);
params = json_create_array();
json_add_item_to_object(item1,"S", item2);
json_add_item_to_array(params, item1);
// jrpc_client_call will free params
if ((ret = jrpc_client_call(client, "foo", params, &reply)) != 0) {
exit(ret);
}
printf("%s\n", json_to_string(reply));
json_delete(reply);
jrpc_client_close(client);
return 0;
}
static int send_error(struct jrpc_connection *conn, int code, char *message,
struct json *id)
{
int return_value = 0;
struct json *result_root = json_create_object();
struct json *error_root = json_create_object();
json_add_number_to_object(error_root, "code", code);
json_add_string_to_object(error_root, "message", message);
json_add_item_to_object(result_root, "error", error_root);
json_add_item_to_object(result_root, "id", id);
return_value = send_response(conn,
json_to_string_unformatted(result_root));
json_delete(result_root);
free(message);
return return_value;
}
// 如果添加失败 返回 NULL
// 如果添加成功，返回所添加的 json_object_t 结构指针
json_object_t * json_append(json_object_t * obj, const char * key, size_t key_len, json_type_t value_type, void * value, size_t value_len) {
assert(obj);
assert( (obj->object_type == JSON_OBJECT && key) || (obj->object_type != JSON_OBJECT) );
while( obj->value_type != JSON_NONE ) {
if( !obj->next ) {
if( obj->object_type == JSON_OBJECT ) {
obj->next = json_create_object();
} else if ( obj->object_type == JSON_ARRAY ) {
obj->next = json_create_array();
} else {
return NULL;
}
}
if( obj->next ) {
obj = obj->next;
} else {
return NULL;
}
}
if( obj->object_type == JSON_OBJECT ) {
#ifdef __x86_64__
assert( !(key_len >> 18) );
#elif __i386__
assert( !(key_len >> 8) );
#endif
obj->key = (char *)key;
obj->key_len = key_len;
}
void InitJSON( void )
{
gsg.json_context = json_create_context();
gsg.base_message = json_create_object( gsg.json_context, sizeof( game_message ) );
json_add_object_member( gsg.base_message, "MsgID", offsetof( struct game_message, ID ), JSON_Element_Integer_32, 0 );
json_add_object_member( gsg.base_message, NULL, offsetof( struct game_message, extra ), JSON_Element_Raw_Object, 0 );
}
void show_idle_prof_stats(int output, struct json_object *parent,
struct buf_output *out)
{
int i, nr_cpus = ipc.nr_cpus;
struct json_object *tmp;
char s[MAX_CPU_STR_LEN];
if (output == FIO_OUTPUT_NORMAL) {
if (ipc.opt > IDLE_PROF_OPT_CALI)
log_buf(out, "\nCPU idleness:\n");
else if (ipc.opt == IDLE_PROF_OPT_CALI)
log_buf(out, "CPU idleness:\n");
if (ipc.opt >= IDLE_PROF_OPT_SYSTEM)
log_buf(out, " system: %3.2f%%\n", fio_idle_prof_cpu_stat(-1));
if (ipc.opt == IDLE_PROF_OPT_PERCPU) {
log_buf(out, " percpu: %3.2f%%", fio_idle_prof_cpu_stat(0));
for (i = 1; i < nr_cpus; i++)
log_buf(out, ", %3.2f%%", fio_idle_prof_cpu_stat(i));
log_buf(out, "\n");
}
if (ipc.opt >= IDLE_PROF_OPT_CALI) {
log_buf(out, " unit work: mean=%3.2fus,", ipc.cali_mean);
log_buf(out, " stddev=%3.2f\n", ipc.cali_stddev);
}
/* dynamic mem allocations can now be freed */
if (ipc.opt != IDLE_PROF_OPT_NONE)
fio_idle_prof_cleanup();
return;
}
if ((ipc.opt != IDLE_PROF_OPT_NONE) && (output & FIO_OUTPUT_JSON)) {
if (!parent)
return;
tmp = json_create_object();
if (!tmp)
return;
json_object_add_value_object(parent, "cpu_idleness", tmp);
json_object_add_value_float(tmp, "system", fio_idle_prof_cpu_stat(-1));
if (ipc.opt == IDLE_PROF_OPT_PERCPU) {
for (i = 0; i < nr_cpus; i++) {
snprintf(s, MAX_CPU_STR_LEN, "cpu-%d", i);
json_object_add_value_float(tmp, s, fio_idle_prof_cpu_stat(i));
}
}
json_object_add_value_float(tmp, "unit_mean", ipc.cali_mean);
json_object_add_value_float(tmp, "unit_stddev", ipc.cali_stddev);
fio_idle_prof_cleanup();
}
}
static int send_result(struct jrpc_connection *conn, struct json *result,
struct json *id)
{
int return_value = 0;
struct json *result_root = json_create_object();
if (result)
json_add_item_to_object(result_root, "result", result);
json_add_item_to_object(result_root, "id", id);
return_value = send_response(conn,
json_to_string_unformatted(result_root));
json_delete(result_root);
return return_value;
}
static struct json *foo(struct jrpc_context * ctx, struct json *params,
struct json *id)
{
struct json *reply, *item, *array;
int a, b, i;
char buf[1024];
json_dump(params);
json_dump(id);
item = json_get_object_item(params->child, "A");
a = item->valueint;
item = json_get_object_item(params->child, "B");
b = item->valueint;
sprintf(buf, "recv a:%d b:%d", a, b);
array = json_create_array();
for(i = 0; i < a; i ++){
item = json_create_object();
json_add_number_to_object(item, "A", i);
json_add_number_to_object(item, "B", b++);
json_add_item_to_array(array, item);
}
reply = json_create_object();
json_add_item_to_object(reply, "Args", array);
json_add_string_to_object(reply, "Str", buf);
json_dump(reply);
return reply;
}
int jrpc_client_call(struct jrpc_client *client, const char *method,
struct json *params, struct json **response)
{
int fd, max_read_size;
size_t bytes_read = 0;
char *new_buffer, *end_ptr = NULL;
struct jrpc_connection *conn;
struct json *root, *request;
request = json_create_object();
json_add_string_to_object(request, "method", method);
json_add_item_to_object(request, "params", params);
json_add_number_to_object(request, "id", client->id);
send_request(&client->conn, json_to_string(request));
json_delete(request);
// read
conn = &client->conn;
fd = conn->sock.fd;
for (;;) {
if (conn->pos == (conn->buffer_size - 1)) {
conn->buffer_size *= 2;
new_buffer = realloc(conn->buffer, conn->buffer_size);
if (new_buffer == NULL) {
perror("Memory error");
return -ENOMEM;
}
conn->buffer = new_buffer;
memset(conn->buffer + conn->pos, 0,
conn->buffer_size - conn->pos);
}
// can not fill the entire buffer, string must be NULL terminated
max_read_size = conn->buffer_size - conn->pos - 1;
if ((bytes_read =
read(fd, conn->buffer + conn->pos, max_read_size))
== -1) {
elog("read %d\n", strerror(errno));
return -EIO;
}
if (!bytes_read) {
// client closed the sending half of the connection
if (client->conn.debug_level)
dlog("Client closed connection.\n");
return -EIO;
}
conn->pos += bytes_read;
if ((root = json_parse_stream(conn->buffer, &end_ptr)) != NULL) {
if (client->conn.debug_level > 1) {
dlog("Valid JSON Received:\n%s\n",
json_to_string(root));
}
if (root->type == JSON_T_OBJECT) {
struct json *id =
json_get_object_item(root, "id");
if (id->type == JSON_T_STRING) {
if (client->id != atoi(id->string))
goto out;
} else if (id->type == JSON_T_NUMBER) {
if (client->id != id->valueint)
goto out;
}
client->id++;
//shift processed request, discarding it
memmove(conn->buffer, end_ptr,
strlen(end_ptr) + 2);
conn->pos = strlen(end_ptr);
memset(conn->buffer + conn->pos, 0,
conn->buffer_size - conn->pos - 1);
*response =
json_detach_item_from_object(root,
"result");
if (*response == NULL)
goto out;
json_delete(root);
return 0;
}
out:
elog("INVALID JSON Received:\n---\n%s\n---\n",
conn->buffer);
json_delete(root);
return -EINVAL;
} else if (end_ptr != (conn->buffer + conn->pos)) {
// did we parse the all buffer? If so, just wait for more.
// else there was an error before the buffer's end
if (client->conn.debug_level) {
elog("INVALID JSON Received:\n---\n%s\n---\n",
conn->buffer);
}
send_error(conn, JRPC_PARSE_ERROR,
strdup("Parse error. Invalid JSON"
" was received by the client."),
NULL);
return -EINVAL;
}
}
}
int json_parse_object( json_task_t *task, json_object_t *parent ) {
char ch;
json_object_t node, * append = NULL;
node.next = parent;
node.key = NULL;
node.key_len = 0;
if( !task->callback ) {
if( !task->root ) {
append = task->root = json_create_object();
} else {
append = parent->value.p = json_create_object();
}
}
task->status = STS_OBJECT_START;
while(( ch = *(task->str + task->count) )) {
task->count ++;
if( ch == ' ' || ch == '\n' || ch == '\t' ) {
continue;
}
switch( task->status ) {
case STS_OBJECT_START:
if( ch == '"' ) {
node.key = task->str + task->count;
if( json_parse_string( task ) != 0 ) {
return -1;
}
// WARNING: key_len 可能发生溢出
node.key_len = task->str + task->count - node.key - 1;
task->status = STS_OBJECT_COLON;
} else if( ch == '}' ) {
// 空对象 {}，忽略
return 0;
} else {
task->err_msg = "expect '\"' or '}'";
return -1;
}
break;
case STS_OBJECT_COLON:
if( ch == ':' ) {
task->status = STS_OBJECT_VALUE;
} else {
task->err_msg = "expect ':'";
return -1;
}
break;
case STS_OBJECT_VALUE:
/* 这里需要将计数减一，因为 json_parse_value 需要根据这一个字符判断 value 类型 */
task->count --;
node.value.s = task->str + task->count;
if( json_parse_value( task, &node ) != 0 ) {
if( node.value_type == JSON_OBJECT ||
node.value_type == JSON_ARRAY ) {
json_delete_object(node.value.p);
}
return -1;
}
// WARNING: value_len 可能发生溢出
node.value_len = task->str + task->count - node.value.s;
task->status = STS_OBJECT_COMMA;
break;
case STS_OBJECT_COMMA:
if( ( ch == ',' || ch == '}' ) ) {
// 对 value 进行处理
switch(node.value_type) {
case JSON_STRING:
// 去除字符串两端的引号
node.value.s += 1;
node.value_len -= 2;
break;
case JSON_DOUBLE:
node.value.d = atof(node.value.s);
break;
case JSON_LONGLONG:
node.value.l = atoll(node.value.s);
break;
case JSON_ARRAY:
case JSON_OBJECT:
break;
}
if( task->callback ) {
task->callback( task, &node );
}
if( !task->callback ) {
switch( node.value_type ) {
case JSON_ARRAY:
case JSON_OBJECT:
case JSON_STRING:
append = json_append(append, node.key, node.key_len,
node.value_type, node.value.p, node.value_len);
break;
default:
append = json_append(append, node.key, node.key_len,
node.value_type, &node.value, node.value_len);
}
}
}
if( ch == ',' ) {
task->status = STS_OBJECT_START;
} else if( ch == '}' ) {
return 0;
} else {
task->err_msg = "expect ',' or '}'";
return -1;
}
break;
default:
task->err_msg = "unknown status";
return -1;
}
}
task->err_msg = "unexpect EOF";
return -1;
}
/*
* Convert the internal Fluent Bit data representation to the required
* one by Elasticsearch.
*
* 'Sadly' this process involves to convert from Msgpack to JSON.
*/
static char *es_format(void *data, size_t bytes, int *out_size,
struct flb_out_es_config *ctx)
{
int i;
int ret;
int n_size;
int index_len;
uint32_t psize;
size_t off = 0;
time_t atime;
char *buf;
char *ptr_key = NULL;
char *ptr_val = NULL;
char buf_key[256];
char buf_val[512];
msgpack_unpacked result;
msgpack_object root;
msgpack_object map;
char *j_entry;
char j_index[ES_BULK_HEADER];
json_t *j_map;
struct es_bulk *bulk;
/* Iterate the original buffer and perform adjustments */
msgpack_unpacked_init(&result);
/* Perform some format validation */
ret = msgpack_unpack_next(&result, data, bytes, &off);
if (!ret) {
return NULL;
}
/* We 'should' get an array */
if (result.data.type != MSGPACK_OBJECT_ARRAY) {
/*
* If we got a different format, we assume the caller knows what he is
* doing, we just duplicate the content in a new buffer and cleanup.
*/
return NULL;
}
root = result.data;
if (root.via.array.size == 0) {
return NULL;
}
/* Create the bulk composer */
bulk = es_bulk_create();
if (!bulk) {
return NULL;
}
/* Format the JSON header required by the ES Bulk API */
index_len = snprintf(j_index,
ES_BULK_HEADER,
ES_BULK_INDEX_FMT,
ctx->index, ctx->type);
off = 0;
msgpack_unpacked_destroy(&result);
msgpack_unpacked_init(&result);
while (msgpack_unpack_next(&result, data, bytes, &off)) {
if (result.data.type != MSGPACK_OBJECT_ARRAY) {
continue;
}
/* Each array must have two entries: time and record */
root = result.data;
if (root.via.array.size != 2) {
continue;
}
/* Create a map entry */
j_map = json_create_object();
atime = root.via.array.ptr[0].via.u64;
map = root.via.array.ptr[1];
n_size = map.via.map.size + 1;
json_add_to_object(j_map, "date", json_create_number(atime));
for (i = 0; i < n_size - 1; i++) {
msgpack_object *k = &map.via.map.ptr[i].key;
msgpack_object *v = &map.via.map.ptr[i].val;
if (k->type != MSGPACK_OBJECT_BIN && k->type != MSGPACK_OBJECT_STR) {
continue;
}
/* Store key */
psize = k->via.bin.size;
if (psize <= (sizeof(buf_key) - 1)) {
memcpy(buf_key, k->via.bin.ptr, psize);
buf_key[psize] = '\0';
ptr_key = buf_key;
}
else {
/* Long JSON map keys have a performance penalty */
ptr_key = flb_malloc(psize + 1);
memcpy(ptr_key, k->via.bin.ptr, psize);
ptr_key[psize] = '\0';
}
/*
* Sanitize key name, Elastic Search 2.x don't allow dots
* in field names:
*
* https://goo.gl/R5NMTr
*/
char *p = ptr_key;
char *end = ptr_key + psize;
while (p != end) {
if (*p == '.') *p = '_';
p++;
}
/* Store value */
if (v->type == MSGPACK_OBJECT_NIL) {
json_add_to_object(j_map, ptr_key, json_create_null());
}
else if (v->type == MSGPACK_OBJECT_BOOLEAN) {
json_add_to_object(j_map, ptr_key,
json_create_bool(v->via.boolean));
}
else if (v->type == MSGPACK_OBJECT_POSITIVE_INTEGER) {
json_add_to_object(j_map, ptr_key,
json_create_number(v->via.u64));
}
else if (v->type == MSGPACK_OBJECT_NEGATIVE_INTEGER) {
json_add_to_object(j_map, ptr_key,
json_create_number(v->via.i64));
}
else if (v->type == MSGPACK_OBJECT_FLOAT) {
json_add_to_object(j_map, ptr_key,
json_create_number(v->via.f64));
}
else if (v->type == MSGPACK_OBJECT_STR) {
/* String value */
psize = v->via.str.size;
if (psize <= (sizeof(buf_val) - 1)) {
memcpy(buf_val, v->via.str.ptr, psize);
buf_val[psize] = '\0';
ptr_val = buf_val;
}
else {
ptr_val = flb_malloc(psize + 1);
memcpy(ptr_val, k->via.str.ptr, psize);
ptr_val[psize] = '\0';
}
json_add_to_object(j_map, ptr_key,
json_create_string(ptr_val));
}
else if (v->type == MSGPACK_OBJECT_BIN) {
/* Bin value */
psize = v->via.bin.size;
if (psize <= (sizeof(buf_val) - 1)) {
memcpy(buf_val, v->via.bin.ptr, psize);
buf_val[psize] = '\0';
ptr_val = buf_val;
}
else {
ptr_val = flb_malloc(psize + 1);
memcpy(ptr_val, k->via.bin.ptr, psize);
ptr_val[psize] = '\0';
}
json_add_to_object(j_map, ptr_key,
json_create_string(ptr_val));
}
if (ptr_key && ptr_key != buf_key) {
flb_free(ptr_key);
}
ptr_key = NULL;
if (ptr_val && ptr_val != buf_val) {
flb_free(ptr_val);
}
ptr_val = NULL;
}
/*
* At this point we have our JSON message, but in order to
* ingest this data into Elasticsearch we need to compose the
* Bulk API request, sadly it requires to prepend a JSON entry
* with details about the target 'index' and 'type' for EVERY
* message.
*/
j_entry = json_print_unformatted(j_map);
json_delete(j_map);
ret = es_bulk_append(bulk,
j_index, index_len,
j_entry, strlen(j_entry));
flb_free(j_entry);
if (ret == -1) {
/* We likely ran out of memory, abort here */
msgpack_unpacked_destroy(&result);
*out_size = 0;
es_bulk_destroy(bulk);
return NULL;
}
}
msgpack_unpacked_destroy(&result);
*out_size = bulk->len;
buf = bulk->ptr;
/*
* Note: we don't destroy the bulk as we need to keep the allocated
* buffer with the data. Instead we just release the bulk context and
* return the bulk->ptr buffer
*/
flb_free(bulk);
return buf;
}