Lua获取系统时间及时间格式化

系统当前时间对应的时间戳

local ntime = os.time

print(ntime)

格式化时间显示，参考下表

常用于设置header等

ngx.header["Last-Modified:"]  = os.date("%a, %d %b %Y %X GMT")

ngx.header["Content-Type"]    = "text/html; charset=utf-8"

ngx.header["Cache-Control"]   = "public"

ngx.header["Expires"]         = os.date("%a, %d %b %Y %X GMT", os.time() + cdnCacheTime)

%a	abbreviated weekday name (e.g., Wed)
%A	full weekday name (e.g., Wednesday)
%b	abbreviated month name (e.g., Sep)
%B	full month name (e.g., September)
%c	date and time (e.g., 09/16/98 23:48:10)
%d	day of the month (16) [01-31]
%H	hour, using a 24-hour clock (23) [00-23]
%I	hour, using a 12-hour clock (11) [01-12]
%M	minute (48) [00-59]
%m	month (09) [01-12]
%p	either "am" or "pm" (pm)
%S	second (10) [00-61]
%w	weekday (3) [0-6 = Sunday-Saturday]
%x	date (e.g., 09/16/98)
%X	time (e.g., 23:48:10)
%Y	full year (1998)
%y	two-digit year (98) [00-99]
%%	the character '%'