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http: do not use local settings for Date header

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Vis Virial 2016-11-10 21:58:15 +09:00 committed by Azat Khuzhin
parent 23f9a20e8d
commit db60ade81d
3 changed files with 40 additions and 14 deletions
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28
evutil_time.c
View File

@ -145,6 +145,34 @@ evutil_usleep_(const struct timeval *tv)
#endif
}
int
evutil_date_rfc1123(char *date, const size_t datelen, struct tm *cur_p) {
static const char *DAYS[] =
{ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
static const char *MONTHS[] =
{ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
time_t t = time(NULL);
/* If `cur_p` is null, set system's current time. */
if (cur_p == NULL) {
#ifdef _WIN32
cur_p = gmtime(&t);
#else
{
struct tm cur;
gmtime_r(&t, &cur);
cur_p = &cur;
}
#endif
}
return evutil_snprintf(
date, datelen, "%s, %02d %s %4d %02d:%02d:%02d GMT",
DAYS[cur_p->tm_wday], cur_p->tm_mday, MONTHS[cur_p->tm_mon],
1900+cur_p->tm_year, cur_p->tm_hour, cur_p->tm_min, cur_p->tm_sec);
}
/*
This function assumes it's called repeatedly with a
not-actually-so-monotonic time source whose outputs are in 'tv'. It

15
http.c
View File

@ -80,7 +80,6 @@
#include <syslog.h>
#endif
#include <signal.h>
#include <time.h>
#ifdef EVENT__HAVE_UNISTD_H
#include <unistd.h>
#endif
@ -491,19 +490,7 @@ evhttp_maybe_add_date_header(struct evkeyvalq *headers)
{
if (evhttp_find_header(headers, "Date") == NULL) {
char date[50];
#ifndef _WIN32
struct tm cur;
#endif
struct tm *cur_p;
time_t t = time(NULL);
#ifdef _WIN32
cur_p = gmtime(&t);
#else
gmtime_r(&t, &cur);
cur_p = &cur;
#endif
if (strftime(date, sizeof(date),
"%a, %d %b %Y %H:%M:%S GMT", cur_p) != 0) {
if (sizeof(date) - evutil_date_rfc1123(date, sizeof(date), NULL) > 0) {
evhttp_add_header(headers, "Date", date);
}
}

11
include/event2/util.h
View File

@ -77,6 +77,8 @@ extern "C" {
#include <sys/socket.h>
#endif
#include <time.h>
/* Some openbsd autoconf versions get the name of this macro wrong. */
#if defined(EVENT__SIZEOF_VOID__) && !defined(EVENT__SIZEOF_VOID_P)
#define EVENT__SIZEOF_VOID_P EVENT__SIZEOF_VOID__
@ -331,6 +333,15 @@ struct evutil_monotonic_timer
#define EV_MONOT_PRECISE 1
#define EV_MONOT_FALLBACK 2
/** Format a date string using RFC 1123 format (used in HTTP).
* If `cur_p` is NULL, current system's time will be used.
* The number of characters written will be returned.
* One should check if the return value is smaller than `datelen` to check if
* the result is truncated or not.
*/
EVENT2_EXPORT_SYMBOL
int evutil_date_rfc1123(char *date, const size_t datelen, struct tm *cur_p);
/** Allocate a new struct evutil_monotonic_timer for use with the
* evutil_configure_monotonic_time() and evutil_gettime_monotonic()
* functions. You must configure the timer with