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MINOR: log: custom name for logformat node

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Add the ability to specify custom name (will be used for representation
in verbose output types such as json) to logformat nodes.

For now, a custom name should be composed by characters [a-zA-Z0-9-_]*
This commit is contained in:
Aurelien DARRAGON 2024-01-08 18:38:29 +01:00
parent 5b31989a3f
commit 2ed6068f2a
2 changed files with 40 additions and 5 deletions
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3
include/haproxy/log-t.h
View File

@ -200,6 +200,8 @@ enum {
LF_SEPARATOR, // a single separator
LF_VAR, // variable name, after '%' or '%{..}'
LF_STARTVAR, // % in text
LF_STONAME, // after '%(' and before ')'
LF_EDONAME, // ')' after '%('
LF_STARG, // after '%{' and berore '}'
LF_EDARG, // '}' after '%{'
LF_STEXPR, // after '%[' or '%{..}[' and berore ']'
@ -212,6 +214,7 @@ struct logformat_node {
struct list list;
int type; // LOG_FMT_*
int options; // LOG_OPT_*
char *name; // printable name for output types that require named fields (ie: json)
char *arg; // text for LOG_FMT_TEXT, arg for others
void *expr; // for use with LOG_FMT_EXPR
};

42
src/log.c
View File

@ -306,7 +306,7 @@ int parse_logformat_var_args(char *args, struct logformat_node *node, char **err
* ignored when arg_len is 0. Neither <var> nor <var_len> may be null.
* Returns false in error case and err is filled, otherwise returns true.
*/
int parse_logformat_var(char *arg, int arg_len, char *var, int var_len, struct proxy *curproxy, struct list *list_format, int *defoptions, char **err)
int parse_logformat_var(char *arg, int arg_len, char *name, int name_len, char *var, int var_len, struct proxy *curproxy, struct list *list_format, int *defoptions, char **err)
{
int j;
struct logformat_node *node = NULL;
@ -321,6 +321,8 @@ int parse_logformat_var(char *arg, int arg_len, char *var, int var_len, struct p
goto error_free;
}
node->type = logformat_keywords[j].type;
if (name)
node->name = my_strndup(name, name_len);
node->options = *defoptions;
if (arg_len) {
node->arg = my_strndup(arg, arg_len);
@ -356,6 +358,7 @@ int parse_logformat_var(char *arg, int arg_len, char *var, int var_len, struct p
error_free:
if (node) {
free(node->arg);
free(node->name);
free(node);
}
return 0;
@ -409,7 +412,7 @@ int add_to_logformat_list(char *start, char *end, int type, struct list *list_fo
*
* In error case, the function returns 0, otherwise it returns 1.
*/
int add_sample_to_logformat_list(char *text, char *arg, int arg_len, struct proxy *curpx, struct list *list_format, int options, int cap, char **err, char **endptr)
int add_sample_to_logformat_list(char *text, char *name, int name_len, char *arg, int arg_len, struct proxy *curpx, struct list *list_format, int options, int cap, char **err, char **endptr)
{
char *cmd[2];
struct sample_expr *expr = NULL;
@ -432,6 +435,8 @@ int add_sample_to_logformat_list(char *text, char *arg, int arg_len, struct prox
memprintf(err, "out of memory error");
goto error_free;
}
if (name)
node->name = my_strndup(name, name_len);
node->type = LOG_FMT_EXPR;
node->expr = expr;
node->options = options;
@ -500,8 +505,10 @@ int parse_logformat_string(const char *fmt, struct proxy *curproxy, struct list
char *sp, *str, *backfmt; /* start pointer for text parts */
char *arg = NULL; /* start pointer for args */
char *var = NULL; /* start pointer for vars */
char *name = NULL; /* token name (optional) */
int arg_len = 0;
int var_len = 0;
int name_len = 0;
int cformat; /* current token format */
int pformat; /* previous token format */
struct logformat_node *tmplf, *back;
@ -535,7 +542,31 @@ int parse_logformat_string(const char *fmt, struct proxy *curproxy, struct list
switch (pformat) {
case LF_STARTVAR: // text immediately following a '%'
arg = NULL; var = NULL;
name = NULL;
name_len = 0;
arg_len = var_len = 0;
if (*str == '(') { // custom output name
cformat = LF_STONAME;
name = str + 1;
}
else
goto startvar;
break;
case LF_STONAME: // text immediately following '%('
if (*str == ')') { // end of custom output name
cformat = LF_EDONAME;
name_len = str - name;
} else if (!isalnum((unsigned char)*str) && *str != '_' && *str != '-') {
memprintf(err, "invalid character in custom name near '%c' at position %d line : '%s'",
*str, (int)(str - backfmt), fmt);
goto fail;
}
break;
case LF_EDONAME: // text immediately following %(name)
startvar:
if (*str == '{') { // optional argument
cformat = LF_STARG;
arg = str + 1;
@ -592,7 +623,7 @@ int parse_logformat_string(const char *fmt, struct proxy *curproxy, struct list
* part of the expression, which MUST be the trailing
* angle bracket.
*/
if (!add_sample_to_logformat_list(var, arg, arg_len, curproxy, list_format, options, cap, err, &str))
if (!add_sample_to_logformat_list(var, name, name_len, arg, arg_len, curproxy, list_format, options, cap, err, &str))
goto fail;
if (*str == ']') {
@ -638,7 +669,7 @@ int parse_logformat_string(const char *fmt, struct proxy *curproxy, struct list
if (cformat != pformat || pformat == LF_SEPARATOR) {
switch (pformat) {
case LF_VAR:
if (!parse_logformat_var(arg, arg_len, var, var_len, curproxy, list_format, &options, err))
if (!parse_logformat_var(arg, arg_len, name, name_len, var, var_len, curproxy, list_format, &options, err))
goto fail;
break;
case LF_TEXT:
@ -651,7 +682,7 @@ int parse_logformat_string(const char *fmt, struct proxy *curproxy, struct list
}
}
if (pformat == LF_STARTVAR || pformat == LF_STARG || pformat == LF_STEXPR) {
if (pformat == LF_STARTVAR || pformat == LF_STARG || pformat == LF_STEXPR || pformat == LF_STONAME || pformat == LF_EDONAME) {
memprintf(err, "truncated line after '%s'", var ? var : arg ? arg : "%");
goto fail;
}
@ -2586,6 +2617,7 @@ void free_logformat_list(struct list *fmt)
list_for_each_entry_safe(lf, lfb, fmt, list) {
LIST_DELETE(&lf->list);
release_sample_expr(lf->expr);
free(lf->name);
free(lf->arg);
free(lf);
}