Stefan Caunter

Use this vcl_fetch to add a custom Expires header to objects. This example adds one day (86400 seconds).

sub vcl_fetch {
set beresp.grace = 4h;
set beresp.ttl = 300s;
C{
#include
static char timebuf[30];
char *format = {“%a, %d %b %Y %H:%M:%S GMT”};
struct tm timestruct;
time_t now;
time(&now);
now+=86400;
gmtime_r(&now, &timestruct);
strftime(timebuf, 30, format, &timestruct);
VRT_SetHdr(sp, HDR_BERESP, “\010Expires:”, timebuf, vrt_magic_string_end);
}C

return(deliver);
}

Run this command to output all the C that varnishd compiles at runtime:

/usr/local/sbin/varnishd -C -f ./default.vcl > file