mirror of
https://github.com/nginx/nginx.git
synced 2024-12-15 05:09:06 +08:00
8184d1b3a7
*) Feature: the ngx_http_ssi_filter_module supports the QUERY_STRING
and DOCUMENT_URI variables.
*) Bugfix: the ngx_http_autoindex_module may some times return the 404
response for existent directory, if this directory was used in
"alias" directive.
*) Bugfix: the ngx_http_ssi_filter_module ran incorrectly for large
responses.
*) Bugfix: the lack of the "Referer" header line was always accounted
as valid referrer.
331 lines
7.7 KiB
C
331 lines
7.7 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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ngx_epoch_msec_t ngx_elapsed_msec;
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ngx_epoch_msec_t ngx_old_elapsed_msec;
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ngx_epoch_msec_t ngx_start_msec;
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static ngx_tm_t ngx_cached_gmtime;
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static ngx_int_t ngx_gmtoff;
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/*
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* In the threaded mode only one thread updates the cached time and strings
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* and these operations are protected by the mutex. The reading of the cached
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* time and strings is not protected by the mutex. To avoid the race
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* conditions for non-atomic values we use the NGX_TIME_SLOTS slots to store
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* time value and strings. Thus thread may get the corrupted values only
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* if it is preempted while copying and then it is not scheduled to run
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* more than NGX_TIME_SLOTS seconds.
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*/
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#if (NGX_THREADS)
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#define NGX_TIME_SLOTS 60
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static ngx_uint_t slot = NGX_TIME_SLOTS;
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static ngx_mutex_t *ngx_time_mutex;
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#else
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#define NGX_TIME_SLOTS 1
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#define slot 0
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#endif
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#if (NGX_THREADS && (NGX_TIME_T_SIZE > NGX_SIG_ATOMIC_T_SIZE))
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volatile time_t *ngx_cached_time;
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static time_t cached_time[NGX_TIME_SLOTS];
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#else
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volatile time_t ngx_cached_time;
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#endif
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ngx_thread_volatile ngx_str_t ngx_cached_err_log_time;
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ngx_thread_volatile ngx_str_t ngx_cached_http_time;
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ngx_thread_volatile ngx_str_t ngx_cached_http_log_time;
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static u_char cached_err_log_time[NGX_TIME_SLOTS]
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[sizeof("1970/09/28 12:00:00")];
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static u_char cached_http_time[NGX_TIME_SLOTS]
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[sizeof("Mon, 28 Sep 1970 06:00:00 GMT")];
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static u_char cached_http_log_time[NGX_TIME_SLOTS]
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[sizeof("28/Sep/1970:12:00:00 +0600")];
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static char *week[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
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static char *months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
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void ngx_time_init(void)
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{
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struct timeval tv;
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ngx_memzero(&ngx_cached_gmtime, sizeof(ngx_tm_t));
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#ifdef ngx_tm_zone
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ngx_cached_gmtime.ngx_tm_zone = "GMT";
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#endif
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ngx_cached_err_log_time.len = sizeof("1970/09/28 12:00:00") - 1;
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ngx_cached_http_time.len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT") - 1;
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ngx_cached_http_log_time.len = sizeof("28/Sep/1970:12:00:00 +0600") - 1;
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#if (NGX_THREADS && (NGX_TIME_T_SIZE > NGX_SIG_ATOMIC_T_SIZE))
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ngx_cached_time = &cached_time[0];
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#endif
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ngx_gettimeofday(&tv);
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ngx_start_msec = (ngx_epoch_msec_t) tv.tv_sec * 1000 + tv.tv_usec / 1000;
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ngx_old_elapsed_msec = 0;
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ngx_elapsed_msec = 0;
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#if !(NGX_WIN32)
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tzset();
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#endif
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ngx_time_update(tv.tv_sec);
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}
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#if (NGX_THREADS)
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ngx_int_t ngx_time_mutex_init(ngx_log_t *log)
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{
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if (!(ngx_time_mutex = ngx_mutex_init(log, NGX_MUTEX_LIGHT))) {
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return NGX_ERROR;
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}
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return NGX_OK;
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}
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#endif
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void ngx_time_update(time_t s)
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{
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u_char *p;
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ngx_tm_t tm;
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if (ngx_time() == s) {
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return;
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}
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#if (NGX_THREADS)
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if (ngx_mutex_trylock(ngx_time_mutex) != NGX_OK) {
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return;
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}
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if (slot == NGX_TIME_SLOTS) {
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slot = 0;
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} else {
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slot++;
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}
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#if (NGX_THREADS && (NGX_TIME_T_SIZE > NGX_SIG_ATOMIC_T_SIZE))
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ngx_cached_time = &cached_time[slot];
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#endif
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#endif
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ngx_time() = s;
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ngx_gmtime(s, &ngx_cached_gmtime);
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p = cached_http_time[slot];
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ngx_sprintf(p, "%s, %02d %s %4d %02d:%02d:%02d GMT",
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week[ngx_cached_gmtime.ngx_tm_wday],
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ngx_cached_gmtime.ngx_tm_mday,
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months[ngx_cached_gmtime.ngx_tm_mon - 1],
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ngx_cached_gmtime.ngx_tm_year,
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ngx_cached_gmtime.ngx_tm_hour,
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ngx_cached_gmtime.ngx_tm_min,
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ngx_cached_gmtime.ngx_tm_sec);
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ngx_cached_http_time.data = p;
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#if (NGX_HAVE_GETTIMEZONE)
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ngx_gmtoff = ngx_gettimezone();
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ngx_gmtime(s + ngx_gmtoff * 60, &tm);
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#elif (NGX_HAVE_GMTOFF)
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ngx_localtime(&tm);
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ngx_gmtoff = tm.ngx_tm_gmtoff / 60;
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#else
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ngx_localtime(&tm);
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ngx_gmtoff = ngx_timezone(tm.ngx_tm_isdst);
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#endif
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p = cached_err_log_time[slot];
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ngx_sprintf(p, "%4d/%02d/%02d %02d:%02d:%02d",
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tm.ngx_tm_year, tm.ngx_tm_mon,
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tm.ngx_tm_mday, tm.ngx_tm_hour,
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tm.ngx_tm_min, tm.ngx_tm_sec);
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ngx_cached_err_log_time.data = p;
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p = cached_http_log_time[slot];
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ngx_sprintf(p, "%02d/%s/%d:%02d:%02d:%02d %c%02d%02d",
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tm.ngx_tm_mday, months[tm.ngx_tm_mon - 1],
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tm.ngx_tm_year, tm.ngx_tm_hour,
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tm.ngx_tm_min, tm.ngx_tm_sec,
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ngx_gmtoff < 0 ? '-' : '+',
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abs(ngx_gmtoff / 60), abs(ngx_gmtoff % 60));
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ngx_cached_http_log_time.data = p;
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#if (NGX_THREADS)
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ngx_mutex_unlock(ngx_time_mutex);
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#endif
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}
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u_char *ngx_http_time(u_char *buf, time_t t)
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{
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ngx_tm_t tm;
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ngx_gmtime(t, &tm);
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return ngx_sprintf(buf, "%s, %02d %s %4d %02d:%02d:%02d GMT",
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week[tm.ngx_tm_wday],
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tm.ngx_tm_mday,
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months[tm.ngx_tm_mon - 1],
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tm.ngx_tm_year,
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tm.ngx_tm_hour,
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tm.ngx_tm_min,
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tm.ngx_tm_sec);
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}
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u_char *ngx_http_cookie_time(u_char *buf, time_t t)
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{
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ngx_tm_t tm;
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ngx_gmtime(t, &tm);
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/*
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* Netscape 3.x does not understand 4-digit years at all and
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* 2-digit years more than "37"
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*/
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return ngx_sprintf(buf,
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(tm.ngx_tm_year > 2037) ?
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"%s, %02d-%s-%d %02d:%02d:%02d GMT":
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"%s, %02d-%s-%02d %02d:%02d:%02d GMT",
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week[tm.ngx_tm_wday],
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tm.ngx_tm_mday,
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months[tm.ngx_tm_mon - 1],
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(tm.ngx_tm_year > 2037) ? tm.ngx_tm_year:
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tm.ngx_tm_year % 100,
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tm.ngx_tm_hour,
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tm.ngx_tm_min,
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tm.ngx_tm_sec);
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}
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void ngx_gmtime(time_t t, ngx_tm_t *tp)
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{
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ngx_int_t sec, min, hour, mday, mon, year, wday, yday, days;
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days = t / 86400;
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/* Jaunary 1, 1970 was Thursday */
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wday = (4 + days) % 7;
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t %= 86400;
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hour = t / 3600;
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t %= 3600;
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min = t / 60;
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sec = t % 60;
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/* the algorithm based on Gauss's formula */
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days = days - (31 + 28) + 719527;
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year = days * 400 / (365 * 400 + 100 - 4 + 1);
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yday = days - (365 * year + year / 4 - year / 100 + year / 400);
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mon = (yday + 31) * 12 / 367;
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mday = yday - (mon * 367 / 12 - 31);
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mon += 2;
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if (yday >= 306) {
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/*
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* there is no "yday" in Win32 SYSTEMTIME
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*
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* yday -= 306;
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*/
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year++;
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mon -= 12;
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if (mday == 0) {
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/* Jaunary 31 */
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mon = 1;
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mday = 31;
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} else if (mon == 2) {
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if ((year % 4 == 0) && (year % 100 || (year % 400 == 0))) {
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if (mday > 29) {
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mon = 3;
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mday -= 29;
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}
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} else if (mday > 28) {
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mon = 3;
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mday -= 28;
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}
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}
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/*
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* there is no "yday" in Win32 SYSTEMTIME
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*
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* } else {
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* yday += 31 + 28;
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*
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* if ((year % 4 == 0) && (year % 100 || (year % 400 == 0))) {
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* yday++;
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* }
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*/
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}
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tp->ngx_tm_sec = (ngx_tm_sec_t) sec;
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tp->ngx_tm_min = (ngx_tm_min_t) min;
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tp->ngx_tm_hour = (ngx_tm_hour_t) hour;
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tp->ngx_tm_mday = (ngx_tm_mday_t) mday;
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tp->ngx_tm_mon = (ngx_tm_mon_t) mon;
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tp->ngx_tm_year = (ngx_tm_year_t) year;
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tp->ngx_tm_wday = (ngx_tm_wday_t) wday;
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}
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