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| | #include <ruby.h>
#include <time.h>
#include <stdio.h>
static const size_t buf_capa = sizeof("Thu, 01 Jan 1970 00:00:00 GMT");
static VALUE buf;
static char *buf_ptr;
static const char *const week[] = {
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
};
static const char *const months[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
/* for people on wonky systems only */
#ifndef HAVE_GMTIME_R
static struct tm * my_gmtime_r(time_t *now, struct tm *tm)
{
struct tm *global = gmtime(now);
if (global)
*tm = *global;
return tm;
}
# define gmtime_r my_gmtime_r
#endif
/*
* Returns a string which represents the time as rfc1123-date of HTTP-date
* defined by RFC 2616:
*
* day-of-week, DD month-name CCYY hh:mm:ss GMT
*
* Note that the result is always GMT.
*
* This method is identical to Time#httpdate in the Ruby standard library,
* except it is implemented in C for performance. We always saw
* Time#httpdate at or near the top of the profiler output so we
* decided to rewrite this in C.
*
* Caveats: it relies on a Ruby implementation with the global VM lock,
* a thread-safe version will be provided when a Unix-only, GVL-free Ruby
* implementation becomes viable.
*/
static VALUE httpdate(VALUE self)
{
static time_t last;
time_t now = time(NULL); /* not a syscall on modern 64-bit systems */
struct tm tm;
if (last == now)
return buf;
last = now;
gmtime_r(&now, &tm);
/* we can make this thread-safe later if our Ruby loses the GVL */
snprintf(buf_ptr, buf_capa,
"%s, %02d %s %4d %02d:%02d:%02d GMT",
week[tm.tm_wday],
tm.tm_mday,
months[tm.tm_mon],
tm.tm_year + 1900,
tm.tm_hour,
tm.tm_min,
tm.tm_sec);
return buf;
}
void init_unicorn_httpdate(void)
{
VALUE mod = rb_const_get(rb_cObject, rb_intern("Unicorn"));
mod = rb_define_module_under(mod, "HttpResponse");
buf = rb_str_new(0, buf_capa - 1);
rb_global_variable(&buf);
buf_ptr = RSTRING_PTR(buf);
httpdate(Qnil);
rb_define_method(mod, "httpdate", httpdate, 0);
}
|