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// SPDX-License-Identifier: GPL-3.0-or-later
#include "nd_log-internals.h"
static bool needs_quotes_for_logfmt(const char *s)
{
static bool safe_for_logfmt[256] = {
[' '] = true, ['!'] = true, ['"'] = false, ['#'] = true, ['$'] = true, ['%'] = true, ['&'] = true,
['\''] = true, ['('] = true, [')'] = true, ['*'] = true, ['+'] = true, [','] = true, ['-'] = true,
['.'] = true, ['/'] = true, ['0'] = true, ['1'] = true, ['2'] = true, ['3'] = true, ['4'] = true,
['5'] = true, ['6'] = true, ['7'] = true, ['8'] = true, ['9'] = true, [':'] = true, [';'] = true,
['<'] = true, ['='] = true, ['>'] = true, ['?'] = true, ['@'] = true, ['A'] = true, ['B'] = true,
['C'] = true, ['D'] = true, ['E'] = true, ['F'] = true, ['G'] = true, ['H'] = true, ['I'] = true,
['J'] = true, ['K'] = true, ['L'] = true, ['M'] = true, ['N'] = true, ['O'] = true, ['P'] = true,
['Q'] = true, ['R'] = true, ['S'] = true, ['T'] = true, ['U'] = true, ['V'] = true, ['W'] = true,
['X'] = true, ['Y'] = true, ['Z'] = true, ['['] = true, ['\\'] = false, [']'] = true, ['^'] = true,
['_'] = true, ['`'] = true, ['a'] = true, ['b'] = true, ['c'] = true, ['d'] = true, ['e'] = true,
['f'] = true, ['g'] = true, ['h'] = true, ['i'] = true, ['j'] = true, ['k'] = true, ['l'] = true,
['m'] = true, ['n'] = true, ['o'] = true, ['p'] = true, ['q'] = true, ['r'] = true, ['s'] = true,
['t'] = true, ['u'] = true, ['v'] = true, ['w'] = true, ['x'] = true, ['y'] = true, ['z'] = true,
['{'] = true, ['|'] = true, ['}'] = true, ['~'] = true, [0x7f] = true,
};
if(!*s)
return true;
while(*s) {
if(*s == '=' || isspace((uint8_t)*s) || !safe_for_logfmt[(uint8_t)*s])
return true;
s++;
}
return false;
}
static void string_to_logfmt(BUFFER *wb, const char *s)
{
bool spaces = needs_quotes_for_logfmt(s);
if(spaces)
buffer_fast_strcat(wb, "\"", 1);
buffer_json_strcat(wb, s);
if(spaces)
buffer_fast_strcat(wb, "\"", 1);
}
void nd_logger_logfmt(BUFFER *wb, struct log_field *fields, size_t fields_max) {
// --- FIELD_PARSER_VERSIONS ---
//
// IMPORTANT:
// THERE ARE 6 VERSIONS OF THIS CODE
//
// 1. journal (direct socket API),
// 2. journal (libsystemd API),
// 3. logfmt,
// 4. json,
// 5. convert to uint64
// 6. convert to int64
//
// UPDATE ALL OF THEM FOR NEW FEATURES OR FIXES
CLEAN_BUFFER *tmp = NULL;
for (size_t i = 0; i < fields_max; i++) {
if (!fields[i].entry.set || !fields[i].logfmt)
continue;
const char *key = fields[i].logfmt;
if(fields[i].annotator) {
const char *s = fields[i].annotator(&fields[i]);
if(!s) continue;
if(buffer_strlen(wb))
buffer_fast_strcat(wb, " ", 1);
buffer_strcat(wb, key);
buffer_fast_strcat(wb, "=", 1);
string_to_logfmt(wb, s);
}
else {
if(buffer_strlen(wb))
buffer_fast_strcat(wb, " ", 1);
switch(fields[i].entry.type) {
case NDFT_TXT:
if(*fields[i].entry.txt) {
buffer_strcat(wb, key);
buffer_fast_strcat(wb, "=", 1);
string_to_logfmt(wb, fields[i].entry.txt);
}
break;
case NDFT_STR:
buffer_strcat(wb, key);
buffer_fast_strcat(wb, "=", 1);
string_to_logfmt(wb, string2str(fields[i].entry.str));
break;
case NDFT_BFR:
if(buffer_strlen(fields[i].entry.bfr)) {
buffer_strcat(wb, key);
buffer_fast_strcat(wb, "=", 1);
string_to_logfmt(wb, buffer_tostring(fields[i].entry.bfr));
}
break;
case NDFT_U64:
buffer_strcat(wb, key);
buffer_fast_strcat(wb, "=", 1);
buffer_print_uint64(wb, fields[i].entry.u64);
break;
case NDFT_I64:
buffer_strcat(wb, key);
buffer_fast_strcat(wb, "=", 1);
buffer_print_int64(wb, fields[i].entry.i64);
break;
case NDFT_DBL:
buffer_strcat(wb, key);
buffer_fast_strcat(wb, "=", 1);
buffer_print_netdata_double(wb, fields[i].entry.dbl);
break;
case NDFT_UUID:
if(!uuid_is_null(*fields[i].entry.uuid)) {
char u[UUID_COMPACT_STR_LEN];
uuid_unparse_lower_compact(*fields[i].entry.uuid, u);
buffer_strcat(wb, key);
buffer_fast_strcat(wb, "=", 1);
buffer_fast_strcat(wb, u, sizeof(u) - 1);
}
break;
case NDFT_CALLBACK: {
if(!tmp)
tmp = buffer_create(1024, NULL);
else
buffer_flush(tmp);
if(fields[i].entry.cb.formatter(tmp, fields[i].entry.cb.formatter_data)) {
buffer_strcat(wb, key);
buffer_fast_strcat(wb, "=", 1);
string_to_logfmt(wb, buffer_tostring(tmp));
}
}
break;
default:
buffer_strcat(wb, "UNHANDLED");
break;
}
}
}
}
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