static time_t
httpReplyHdrExpirationTime_(const HttpReply * rep)
{
if (rep->cache_control)
{
if (rep->date >= 0)
{
if (rep->cache_control->s_maxage >= 0)
return rep->date + rep->cache_control->s_maxage;
if (rep->cache_control->max_age >= 0)
return rep->date + rep->cache_control->max_age;
}
else
{
if (rep->cache_control->s_maxage >= 0)
return squid_curtime;
if (rep->cache_control->max_age >= 0)
return squid_curtime;
}
}
if (Config.onoff.vary_ignore_expire &&
httpHeaderHas(&rep->header, HDR_VARY))
{
const time_t d = httpHeaderGetTime(&rep->header, HDR_DATE);
const time_t e = httpHeaderGetTime(&rep->header, HDR_EXPIRES);
if (d == e)
return -1;
}
if (httpHeaderHas(&rep->header, HDR_EXPIRES))
{
const time_t e = httpHeaderGetTime(&rep->header, HDR_EXPIRES);
return e < 0 ? squid_curtime : e;
}
return -1;
}
/* sync this routine when you update HttpReply struct */
static void
httpReplyHdrCacheInit(HttpReply * rep)
{
const HttpHeader *hdr = &rep->header;
const char *str;
rep->content_length = httpHeaderGetSize(hdr, HDR_CONTENT_LENGTH);
rep->date = httpHeaderGetTime(hdr, HDR_DATE);
rep->last_modified = httpHeaderGetTime(hdr, HDR_LAST_MODIFIED);
str = httpHeaderGetStr(hdr, HDR_CONTENT_TYPE);
if (str)
stringLimitInit(&rep->content_type, str, strcspn(str, ";\t "));
else
rep->content_type = StringNull;
rep->cache_control = httpHeaderGetCc(hdr);
rep->content_range = httpHeaderGetContRange(hdr);
rep->keep_alive = httpMsgIsPersistent(rep->sline.version, &rep->header);
/* be sure to set expires after date and cache-control */
rep->expires = httpReplyHdrExpirationTime(rep);
}
static time_t
httpReplyHdrExpirationTime(const HttpReply * rep)
{
/* The s-maxage and max-age directive takes priority over Expires */
if (rep->cache_control) {
if (rep->date >= 0) {
if (rep->cache_control->s_maxage >= 0)
return rep->date + rep->cache_control->s_maxage;
if (rep->cache_control->max_age >= 0)
return rep->date + rep->cache_control->max_age;
} else {
/*
* Conservatively handle the case when we have a max-age
* header, but no Date for reference?
*/
if (rep->cache_control->s_maxage >= 0)
return squid_curtime;
if (rep->cache_control->max_age >= 0)
return squid_curtime;
}
}
if (Config.onoff.vary_ignore_expire &&
httpHeaderHas(&rep->header, HDR_VARY)) {
const time_t d = httpHeaderGetTime(&rep->header, HDR_DATE);
const time_t e = httpHeaderGetTime(&rep->header, HDR_EXPIRES);
if (d == e)
return -1;
}
if (httpHeaderHas(&rep->header, HDR_EXPIRES)) {
const time_t e = httpHeaderGetTime(&rep->header, HDR_EXPIRES);
/*
* HTTP/1.0 says that robust implementations should consider
* bad or malformed Expires header as equivalent to "expires
* immediately."
*/
return e < 0 ? squid_curtime : e;
}
return -1;
}
