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/* Copyright (c) 2019 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "ioloop.h"
#include "array.h"
#include "lib-event-private.h"
#include "event-exporter.h"
#include "str.h"
#include "strescape.h"
#include "hostpid.h"
static void append_strlist(string_t *dest, const ARRAY_TYPE(const_string) *strlist)
{
string_t *str = t_str_new(64);
const char *value;
bool first = TRUE;
/* append the strings first escaped into a temporary string */
array_foreach_elem(strlist, value) {
if (first)
first = FALSE;
else
str_append_c(str, '\t');
str_append_tabescaped(str, value);
}
/* append the temporary string (double-)escaped as the value */
str_append_tabescaped(dest, str_c(str));
}
static void append_int(string_t *dest, intmax_t val)
{
str_printfa(dest, "%jd", val);
}
static void append_time(string_t *dest, const struct timeval *time,
enum event_exporter_time_fmt fmt)
{
switch (fmt) {
case EVENT_EXPORTER_TIME_FMT_NATIVE:
i_panic("tab-text format does not have a native date/time type");
case EVENT_EXPORTER_TIME_FMT_UNIX:
event_export_helper_fmt_unix_time(dest, time);
break;
case EVENT_EXPORTER_TIME_FMT_RFC3339:
event_export_helper_fmt_rfc3339_time(dest, time);
break;
}
}
static void append_field_str(string_t *dest, const char *str,
const struct metric_export_info *info)
{
if (info->exporter->format_max_field_len == 0)
str_append_tabescaped(dest, str);
else {
size_t len = strlen(str);
str_append_tabescaped_n(dest, (const unsigned char *)str,
I_MIN(len, info->exporter->format_max_field_len));
if (len > info->exporter->format_max_field_len)
str_append(dest, "...");
}
}
static void append_field_value(string_t *dest, const struct event_field *field,
const struct metric_export_info *info)
{
switch (field->value_type) {
case EVENT_FIELD_VALUE_TYPE_STR:
append_field_str(dest, field->value.str, info);
break;
case EVENT_FIELD_VALUE_TYPE_INTMAX:
append_int(dest, field->value.intmax);
break;
case EVENT_FIELD_VALUE_TYPE_TIMEVAL:
append_time(dest, &field->value.timeval,
info->exporter->time_format);
break;
case EVENT_FIELD_VALUE_TYPE_STRLIST:
append_strlist(dest, &field->value.strlist);
break;
}
}
static void tabtext_export_name(string_t *dest, struct event *event,
const struct metric_export_info *info)
{
if ((info->include & EVENT_EXPORTER_INCL_NAME) == 0)
return;
str_append(dest, "event:");
str_append_tabescaped(dest, event->sending_name);
str_append_c(dest, '\t');
}
static void tabtext_export_hostname(string_t *dest,
const struct metric_export_info *info)
{
if ((info->include & EVENT_EXPORTER_INCL_HOSTNAME) == 0)
return;
str_append(dest, "hostname:");
str_append_tabescaped(dest, my_hostname);
str_append_c(dest, '\t');
}
static void tabtext_export_timestamps(string_t *dest, struct event *event,
const struct metric_export_info *info)
{
if ((info->include & EVENT_EXPORTER_INCL_TIMESTAMPS) == 0)
return;
str_append(dest, "start_time:");
append_time(dest, &event->tv_created, info->exporter->time_format);
str_append(dest, "\tend_time:");
append_time(dest, &ioloop_timeval, info->exporter->time_format);
str_append_c(dest, '\t');
}
static void append_category(string_t *dest, const char *cat)
{
str_append(dest, "category:");
str_append_tabescaped(dest, cat);
}
static void tabtext_export_categories(string_t *dest, struct event *event,
const struct metric_export_info *info)
{
struct event_category *const *cats;
unsigned int count;
if ((info->include & EVENT_EXPORTER_INCL_CATEGORIES) == 0)
return;
cats = event_get_categories(event, &count);
event_export_helper_fmt_categories(dest, cats, count,
append_category, "\t");
str_append_c(dest, '\t'); /* extra \t to have something to remove later */
}
static void tabtext_export_fields(string_t *dest, struct event *event,
const struct metric_export_info *info,
const unsigned int fields_count,
const struct metric_field *fields)
{
if ((info->include & EVENT_EXPORTER_INCL_FIELDS) == 0)
return;
if (fields_count == 0) {
/* include all fields */
const struct event_field *fields;
unsigned int count;
fields = event_get_fields(event, &count);
for (unsigned int i = 0; i < count; i++) {
const struct event_field *field = &fields[i];
str_append(dest, "field:");
str_append_tabescaped(dest, field->key);
str_append_c(dest, '=');
append_field_value(dest, field, info);
str_append_c(dest, '\t');
}
} else {
for (unsigned int i = 0; i < fields_count; i++) {
const char *name = fields[i].field_key;
const struct event_field *field;
field = event_find_field_recursive(event, name);
if (field == NULL)
continue; /* doesn't exist, skip it */
str_append(dest, "field:");
str_append_tabescaped(dest, name);
str_append_c(dest, '=');
append_field_value(dest, field, info);
str_append_c(dest, '\t');
}
}
}
/*
* Serialize the event as tab delimited collection of the following:
*
* event:<event name>
* hostname:<tab escaped hostname>
* start_time:<event creation timestamp>
* end_time:<event export timestamp>
* category:<category>
* field:<name>=<tab escaped value>
*
* Note: cat and field can occur multiple times.
*/
void event_export_fmt_tabescaped_text(const struct metric *metric,
struct event *event, buffer_t *dest)
{
const struct metric_export_info *info = &metric->export_info;
if (info->include == EVENT_EXPORTER_INCL_NONE)
return;
tabtext_export_name(dest, event, info);
tabtext_export_hostname(dest, info);
tabtext_export_timestamps(dest, event, info);
tabtext_export_categories(dest, event, info);
tabtext_export_fields(dest, event, info, metric->fields_count,
metric->fields);
/* remove trailing tab */
str_truncate(dest, str_len(dest) - 1);
}
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