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c56e086ba3
This PR was created to fix #3414, here I am completing the job initiated by Christopher, among the newest features that we are bring we have JSON inside the core - We are bringing to the core the capacity to work with JSON files, this is available either using the JSON-C library case it is present in the system or using JSMN library that was incorporated to our core. The preference is to have JSON-C, because it is a more complete library, but case the user does not have the library installed we are keeping the JSMN for we do not lose the feature. Health LIST - We are bringing more one command to the Health API, now with the LIST it is possible to get in JSON format the alarms active with Netdata. Health reorganized - Previously we had duplicated code in different files, this PR is fixing this (Thanks @cakrit !), the Health is now better organized. Removing memory leak - The first implementation of the json.c was creating SILENCERS without to link it in anywhere. Now it has been linked properly. Script updated - We are bringing some changes to the script that tests the Health. This PR also fixes the race condition created by the previous new position of the SILENCERS creation, I had to move it to daemon/main.c, because after various tests, it was confirmed that the error could happen in different parts of the code, case it was not initialized before the threads starts. Component Name health directory health-cmd Additional Information Fixes #6356 and #3414
326 lines
No EOL
9.7 KiB
C
326 lines
No EOL
9.7 KiB
C
#include <stdlib.h>
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#include "jsmn.h"
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/**
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* Alloc token
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*
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* Allocates a fresh unused token from the token pull.
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*
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* @param parser the controller
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* @param tokens the tokens I am working
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* @param num_tokens the number total of tokens.
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*
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* @return it returns the next token to work.
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*/
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static jsmntok_t *jsmn_alloc_token(jsmn_parser *parser,
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jsmntok_t *tokens, size_t num_tokens) {
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jsmntok_t *tok;
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if (parser->toknext >= num_tokens) {
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return NULL;
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}
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tok = &tokens[parser->toknext++];
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tok->start = tok->end = -1;
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tok->size = 0;
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#ifdef JSMN_PARENT_LINKS
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tok->parent = -1;
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#endif
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return tok;
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}
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/**
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* Fill Token
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*
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* Fills token type and boundaries.
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*
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* @param token the structure to set the values
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* @param type is the token type
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* @param start is the first position of the value
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* @param end is the end of the value
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*/
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static void jsmn_fill_token(jsmntok_t *token, jsmntype_t type,
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int start, int end) {
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token->type = type;
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token->start = start;
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token->end = end;
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token->size = 0;
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}
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/**
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* Parse primitive
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*
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* Fills next available token with JSON primitive.
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*
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* @param parser is the control structure
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* @param js is the json string
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* @param type is the token type
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*/
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static jsmnerr_t jsmn_parse_primitive(jsmn_parser *parser, const char *js,
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size_t len, jsmntok_t *tokens, size_t num_tokens) {
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jsmntok_t *token;
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int start;
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start = parser->pos;
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for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
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switch (js[parser->pos]) {
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#ifndef JSMN_STRICT
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/* In strict mode primitive must be followed by "," or "}" or "]" */
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case ':':
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#endif
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case '\t' : case '\r' : case '\n' : case ' ' :
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case ',' : case ']' : case '}' :
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goto found;
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}
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if (js[parser->pos] < 32 || js[parser->pos] >= 127) {
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parser->pos = start;
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return JSMN_ERROR_INVAL;
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}
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}
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#ifdef JSMN_STRICT
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/* In strict mode primitive must be followed by a comma/object/array */
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parser->pos = start;
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return JSMN_ERROR_PART;
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#endif
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found:
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if (tokens == NULL) {
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parser->pos--;
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return 0;
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}
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token = jsmn_alloc_token(parser, tokens, num_tokens);
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if (token == NULL) {
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parser->pos = start;
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return JSMN_ERROR_NOMEM;
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}
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jsmn_fill_token(token, JSMN_PRIMITIVE, start, parser->pos);
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#ifdef JSMN_PARENT_LINKS
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token->parent = parser->toksuper;
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#endif
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parser->pos--;
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return 0;
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}
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/**
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* Parse string
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*
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* Fills next token with JSON string.
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*
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* @param parser is the control structure
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* @param js is the json string
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* @param len is the js length
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* @param tokens is structure with the tokens mapped.
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* @param num_tokens is the total number of tokens
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*
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* @return It returns 0 on success and another integer otherwise
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*/
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static jsmnerr_t jsmn_parse_string(jsmn_parser *parser, const char *js,
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size_t len, jsmntok_t *tokens, size_t num_tokens) {
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jsmntok_t *token;
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int start = parser->pos;
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parser->pos++;
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/* Skip starting quote */
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for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
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char c = js[parser->pos];
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/* Quote: end of string */
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if (c == '\"') {
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if (tokens == NULL) {
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return 0;
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}
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token = jsmn_alloc_token(parser, tokens, num_tokens);
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if (token == NULL) {
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parser->pos = start;
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return JSMN_ERROR_NOMEM;
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}
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jsmn_fill_token(token, JSMN_STRING, start+1, parser->pos);
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#ifdef JSMN_PARENT_LINKS
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token->parent = parser->toksuper;
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#endif
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return 0;
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}
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/* Backslash: Quoted symbol expected */
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if (c == '\\') {
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parser->pos++;
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switch (js[parser->pos]) {
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/* Allowed escaped symbols */
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case '\"': case '/' : case '\\' : case 'b' :
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case 'f' : case 'r' : case 'n' : case 't' :
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break;
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/* Allows escaped symbol \uXXXX */
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case 'u':
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parser->pos++;
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int i = 0;
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for(; i < 4 && js[parser->pos] != '\0'; i++) {
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/* If it isn't a hex character we have an error */
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if(!((js[parser->pos] >= 48 && js[parser->pos] <= 57) || /* 0-9 */
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(js[parser->pos] >= 65 && js[parser->pos] <= 70) || /* A-F */
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(js[parser->pos] >= 97 && js[parser->pos] <= 102))) { /* a-f */
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parser->pos = start;
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return JSMN_ERROR_INVAL;
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}
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parser->pos++;
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}
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parser->pos--;
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break;
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/* Unexpected symbol */
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default:
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parser->pos = start;
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return JSMN_ERROR_INVAL;
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}
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}
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}
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parser->pos = start;
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return JSMN_ERROR_PART;
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}
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/**
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* JSMN Parse
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*
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* Parse JSON string and fill tokens.
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*
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* @param parser the auxiliar vector used to parser
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* @param js the string to parse
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* @param len the string length
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* @param tokens the place to map the tokens
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* @param num_tokens the number of tokens present in the tokens structure.
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*
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* @return It returns the number of tokens present in the string on success or a negative number otherwise
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*/
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jsmnerr_t jsmn_parse(jsmn_parser *parser, const char *js, size_t len,
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jsmntok_t *tokens, unsigned int num_tokens) {
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jsmnerr_t r;
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int i;
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jsmntok_t *token;
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int count = 0;
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for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
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char c;
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jsmntype_t type;
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c = js[parser->pos];
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switch (c) {
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case '{': case '[':
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count++;
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if (tokens == NULL) {
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break;
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}
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token = jsmn_alloc_token(parser, tokens, num_tokens);
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if (token == NULL)
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return JSMN_ERROR_NOMEM;
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if (parser->toksuper != -1) {
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tokens[parser->toksuper].size++;
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#ifdef JSMN_PARENT_LINKS
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token->parent = parser->toksuper;
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#endif
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}
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token->type = (c == '{' ? JSMN_OBJECT : JSMN_ARRAY);
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token->start = parser->pos;
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parser->toksuper = parser->toknext - 1;
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break;
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case '}': case ']':
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if (tokens == NULL)
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break;
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type = (c == '}' ? JSMN_OBJECT : JSMN_ARRAY);
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#ifdef JSMN_PARENT_LINKS
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if (parser->toknext < 1) {
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return JSMN_ERROR_INVAL;
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}
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token = &tokens[parser->toknext - 1];
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for (;;) {
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if (token->start != -1 && token->end == -1) {
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if (token->type != type) {
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return JSMN_ERROR_INVAL;
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}
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token->end = parser->pos + 1;
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parser->toksuper = token->parent;
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break;
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}
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if (token->parent == -1) {
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break;
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}
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token = &tokens[token->parent];
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}
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#else
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for (i = parser->toknext - 1; i >= 0; i--) {
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token = &tokens[i];
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if (token->start != -1 && token->end == -1) {
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if (token->type != type) {
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return JSMN_ERROR_INVAL;
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}
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parser->toksuper = -1;
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token->end = parser->pos + 1;
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break;
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}
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}
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/* Error if unmatched closing bracket */
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if (i == -1) return JSMN_ERROR_INVAL;
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for (; i >= 0; i--) {
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token = &tokens[i];
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if (token->start != -1 && token->end == -1) {
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parser->toksuper = i;
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break;
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}
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}
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#endif
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break;
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case '\"':
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r = jsmn_parse_string(parser, js, len, tokens, num_tokens);
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if (r < 0) return r;
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count++;
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if (parser->toksuper != -1 && tokens != NULL)
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tokens[parser->toksuper].size++;
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break;
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case '\t' : case '\r' : case '\n' : case ':' : case ',': case ' ':
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break;
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#ifdef JSMN_STRICT
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/* In strict mode primitives are: numbers and booleans */
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case '-': case '0': case '1' : case '2': case '3' : case '4':
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case '5': case '6': case '7' : case '8': case '9':
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case 't': case 'f': case 'n' :
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#else
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/* In non-strict mode every unquoted value is a primitive */
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default:
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#endif
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r = jsmn_parse_primitive(parser, js, len, tokens, num_tokens);
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if (r < 0) return r;
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count++;
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if (parser->toksuper != -1 && tokens != NULL)
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tokens[parser->toksuper].size++;
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break;
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#ifdef JSMN_STRICT
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/* Unexpected char in strict mode */
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default:
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return JSMN_ERROR_INVAL;
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#endif
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}
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}
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for (i = parser->toknext - 1; i >= 0; i--) {
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/* Unmatched opened object or array */
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if (tokens[i].start != -1 && tokens[i].end == -1) {
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return JSMN_ERROR_PART;
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}
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}
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return count;
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}
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/**
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* JSMN Init
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*
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* Creates a new parser based over a given buffer with an array of tokens
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* available.
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*
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* @param parser is the structure with values to reset
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*/
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void jsmn_init(jsmn_parser *parser) {
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parser->pos = 0;
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parser->toknext = 0;
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parser->toksuper = -1;
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} |