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MINOR: debug: add a special converter which display its input sample content.

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This converter displays its input sample type and content. It is useful
for debugging some complex configurations.
This commit is contained in:
Thierry FOURNIER 2015-05-07 15:46:29 +02:00 committed by Willy Tarreau
parent 9c627e84b2
commit 9687c77c91
2 changed files with 47 additions and 0 deletions
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5
doc/configuration.txt
View File

@ -10930,6 +10930,11 @@ da-csv(<prop>[,<prop>*])
default_backend servers
http-request set-header X-DeviceAtlas-Data %[req.fhdr(User-Agent),da-csv(primaryHardwareType,osName,osVersion,browserName,browserVersion)]
debug
This converter is used as debug tool. It dumps on screen the content and the
type of the input sample. The sample is returned as is on its output. This
converter only exists when haproxy was built with debugging enabled.
div(<value>)
Divides the input value of type unsigned integer by <value>, and returns the
result as an unsigned integer. If <value> is null, the largest unsigned

42
src/sample.c
View File

@ -1389,6 +1389,44 @@ struct sample *sample_fetch_string(struct proxy *px, struct session *sess,
/* These functions set the data type on return. */
/*****************************************************************/
#ifdef DEBUG_EXPR
static int sample_conv_debug(const struct arg *arg_p, struct sample *smp, void *private)
{
int i;
struct sample tmp;
if (!(global.mode & MODE_QUIET) || (global.mode & (MODE_VERBOSE | MODE_STARTING))) {
fprintf(stderr, "[debug converter] type: %s ", smp_to_type[smp->type]);
if (!sample_casts[smp->type][SMP_T_STR]) {
fprintf(stderr, "(undisplayable)");
} else {
/* Copy sample fetch. This put the sample as const, the
* cast will copy data if a transformation is required.
*/
memcpy(&tmp, smp, sizeof(struct sample));
tmp.flags = SMP_F_CONST;
if (!sample_casts[smp->type][SMP_T_STR](&tmp))
fprintf(stderr, "(undisplayable)");
else {
/* Display the displayable chars*. */
fprintf(stderr, "<");
for (i = 0; i < tmp.data.str.len; i++) {
if (isprint(tmp.data.str.str[i]))
fputc(tmp.data.str.str[i], stderr);
else
fputc('.', stderr);
}
}
fprintf(stderr, ">\n");
}
}
return 1;
}
#endif
static int sample_conv_bin2base64(const struct arg *arg_p, struct sample *smp, void *private)
{
struct chunk *trash = get_trash_chunk();
@ -2387,6 +2425,10 @@ static struct sample_fetch_kw_list smp_kws = {ILH, {
/* Note: must not be declared <const> as its list will be overwritten */
static struct sample_conv_kw_list sample_conv_kws = {ILH, {
#ifdef DEBUG_EXPR
{ "debug", sample_conv_debug, 0, NULL, SMP_T_ANY, SMP_T_ANY },
#endif
{ "base64", sample_conv_bin2base64,0, NULL, SMP_T_BIN, SMP_T_STR },
{ "upper", sample_conv_str2upper, 0, NULL, SMP_T_STR, SMP_T_STR },
{ "lower", sample_conv_str2lower, 0, NULL, SMP_T_STR, SMP_T_STR },