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feat: add native Prometheus metrics exporter to stats server #2754

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feat: add native Prometheus metrics exporter to stats server #2754

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7 changes: 6 additions & 1 deletion core/emperor.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2528,7 +2528,12 @@ static void emperor_send_stats(int fd) {
}

if (uwsgi.stats_http) {
if (uwsgi_send_http_stats(client_fd)) {
enum uwsgi_stats_format fmt;
if (uwsgi_stats_read_request(client_fd, &fmt)) {
close(client_fd);
return;
}
if (uwsgi_stats_send_http_header(client_fd, UWSGI_STATS_FORMAT_JSON)) {
close(client_fd);
return;
}
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20 changes: 18 additions & 2 deletions core/stats.c
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Original file line number Diff line number Diff line change
Expand Up @@ -365,17 +365,33 @@ void uwsgi_send_stats(int fd, struct uwsgi_stats *(*func) (void)) {
return;
}

enum uwsgi_stats_format fmt = UWSGI_STATS_FORMAT_JSON;
if (uwsgi.stats_http) {
if (uwsgi_send_http_stats(client_fd)) {
if (uwsgi_stats_read_request(client_fd, &fmt)) {
close(client_fd);
return;
}
}

struct uwsgi_stats *us = func();
struct uwsgi_stats *us;
switch (fmt) {
case UWSGI_STATS_FORMAT_PROMETHEUS:
us = uwsgi_master_generate_stats_prometheus();
break;
default:
us = func();
break;
}

if (!us)
goto end;

if (uwsgi.stats_http) {
if (uwsgi_stats_send_http_header(client_fd, fmt)) {
goto end0;
}
}

size_t remains = us->pos;
off_t pos = 0;
while (remains > 0) {
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