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MINOR: map: add map_*_key converters to provide the matching key

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All map_*_ converters now have an additional output type: key. Such
converters will return the matched entry's key (as found in the map file)
as a string instead of the value.

Consider this example map file:
 |example.com value1
 |haproxy value2

With the above map file:

str(test.example.com/url),map_dom_key(file.map) will return "example.com"
str(running haproxy),map_sub_key(file.map) will return "haproxy"

This should address GH .
This commit is contained in:
Aurelien DARRAGON 2023-12-19 11:49:05 +01:00 committed by Christopher Faulet
parent 9b2717e7bb
commit ca47583787
2 changed files with 65 additions and 22 deletions

49
doc/configuration.txt
View File

@ -19265,33 +19265,38 @@ map_<match_type>_<output_type>(<map_name>[,<default_value>])
The following array contains the list of all map functions available sorted by
input type, match type and output type.
input type | match method | output type str | output type int | output type ip
-----------+--------------+-----------------+-----------------+---------------
str | str | map_str | map_str_int | map_str_ip
-----------+--------------+-----------------+-----------------+---------------
str | beg | map_beg | map_beg_int | map_end_ip
-----------+--------------+-----------------+-----------------+---------------
str | sub | map_sub | map_sub_int | map_sub_ip
-----------+--------------+-----------------+-----------------+---------------
str | dir | map_dir | map_dir_int | map_dir_ip
-----------+--------------+-----------------+-----------------+---------------
str | dom | map_dom | map_dom_int | map_dom_ip
-----------+--------------+-----------------+-----------------+---------------
str | end | map_end | map_end_int | map_end_ip
-----------+--------------+-----------------+-----------------+---------------
str | reg | map_reg | map_reg_int | map_reg_ip
-----------+--------------+-----------------+-----------------+---------------
str | reg | map_regm | map_reg_int | map_reg_ip
-----------+--------------+-----------------+-----------------+---------------
int | int | map_int | map_int_int | map_int_ip
-----------+--------------+-----------------+-----------------+---------------
ip | ip | map_ip | map_ip_int | map_ip_ip
-----------+--------------+-----------------+-----------------+---------------
input type | match method | output type str | output type int | output type ip | output type key
-----------+--------------+-----------------+-----------------+----------------+----------------
str | str | map_str | map_str_int | map_str_ip | map_str_key
-----------+--------------+-----------------+-----------------+----------------+----------------
str | beg | map_beg | map_beg_int | map_end_ip | map_end_key
-----------+--------------+-----------------+-----------------+----------------+----------------
str | sub | map_sub | map_sub_int | map_sub_ip | map_sub_key
-----------+--------------+-----------------+-----------------+----------------+----------------
str | dir | map_dir | map_dir_int | map_dir_ip | map_dir_key
-----------+--------------+-----------------+-----------------+----------------+----------------
str | dom | map_dom | map_dom_int | map_dom_ip | map_dom_key
-----------+--------------+-----------------+-----------------+----------------+----------------
str | end | map_end | map_end_int | map_end_ip | map_end_key
-----------+--------------+-----------------+-----------------+----------------+----------------
str | reg | map_reg | map_reg_int | map_reg_ip | map_reg_key
-----------+--------------+-----------------+-----------------+----------------+----------------
str | reg | map_regm | map_reg_int | map_reg_ip | map_reg_key
-----------+--------------+-----------------+-----------------+----------------+----------------
int | int | map_int | map_int_int | map_int_ip | map_int_key
-----------+--------------+-----------------+-----------------+----------------+----------------
ip | ip | map_ip | map_ip_int | map_ip_ip | map_ip_key
-----------+--------------+-----------------+-----------------+----------------+----------------
The special map called "map_regm" expect matching zone in the regular
expression and modify the output replacing back reference (like "\1") by
the corresponding match text.
Output type "key" means that it its the matched entry's key (as found in the
map file)that will be returned as a string instead of the value. Note that
optional <default_value> argument is not supported when "key" output type is
used.
Files referenced by <map_name> contains one key + value per line. Lines which
start with '#' are ignored, just like empty lines. Leading tabs and spaces
are stripped. The key is then the first "word" (series of non-space/tabs

38
src/map.c
View File

@ -170,6 +170,34 @@ int sample_load_map(struct arg *arg, struct sample_conv *conv,
return 1;
}
/* try to match input sample against map entries, returns matched entry's key
* on success
*/
static int sample_conv_map_key(const struct arg *arg_p, struct sample *smp, void *private)
{
struct map_descriptor *desc;
struct pattern *pat;
/* get config */
desc = arg_p[0].data.map;
/* Execute the match function. */
pat = pattern_exec_match(&desc->pat, smp, 1);
/* Match case. */
if (pat) {
smp->data.type = SMP_T_STR;
smp->flags |= SMP_F_CONST;
smp->data.u.str.area = (char *)pat->ref->pattern;
smp->data.u.str.data = strlen(pat->ref->pattern);
return 1;
}
return 0;
}
/* try to match input sample against map entries, returns matched entry's value
* on success
*/
static int sample_conv_map(const struct arg *arg_p, struct sample *smp, void *private)
{
struct map_descriptor *desc;
@ -1226,6 +1254,16 @@ static struct sample_conv_kw_list sample_conv_kws = {ILH, {
{ "map_int_ip", sample_conv_map, ARG2(1,STR,STR), sample_load_map, SMP_T_SINT, SMP_T_ADDR, (void *)PAT_MATCH_INT },
{ "map_ip_ip", sample_conv_map, ARG2(1,STR,STR), sample_load_map, SMP_T_ADDR, SMP_T_ADDR, (void *)PAT_MATCH_IP },
{ "map_str_key", sample_conv_map_key, ARG1(1,STR), sample_load_map, SMP_T_STR, SMP_T_STR, (void *)PAT_MATCH_STR },
{ "map_beg_key", sample_conv_map_key, ARG1(1,STR), sample_load_map, SMP_T_STR, SMP_T_STR, (void *)PAT_MATCH_BEG },
{ "map_sub_key", sample_conv_map_key, ARG1(1,STR), sample_load_map, SMP_T_STR, SMP_T_STR, (void *)PAT_MATCH_SUB },
{ "map_dir_key", sample_conv_map_key, ARG1(1,STR), sample_load_map, SMP_T_STR, SMP_T_STR, (void *)PAT_MATCH_DIR },
{ "map_dom_key", sample_conv_map_key, ARG1(1,STR), sample_load_map, SMP_T_STR, SMP_T_STR, (void *)PAT_MATCH_DOM },
{ "map_end_key", sample_conv_map_key, ARG1(1,STR), sample_load_map, SMP_T_STR, SMP_T_STR, (void *)PAT_MATCH_END },
{ "map_reg_key", sample_conv_map_key, ARG1(1,STR), sample_load_map, SMP_T_STR, SMP_T_STR, (void *)PAT_MATCH_REG },
{ "map_int_key", sample_conv_map_key, ARG1(1,STR), sample_load_map, SMP_T_SINT, SMP_T_STR, (void *)PAT_MATCH_INT },
{ "map_ip_key", sample_conv_map_key, ARG1(1,STR), sample_load_map, SMP_T_ADDR, SMP_T_STR, (void *)PAT_MATCH_IP },
{ /* END */ },
}};