void
CacheStorageService::MemoryPool::PurgeExpired()
{
MOZ_ASSERT(IsOnManagementThread());
mExpirationArray.Sort(ExpirationComparator());
uint32_t now = NowInSeconds();
uint32_t const memoryLimit = Limit();
for (uint32_t i = 0; mMemorySize > memoryLimit && i < mExpirationArray.Length();) {
if (CacheIOThread::YieldAndRerun())
return;
nsRefPtr<CacheEntry> entry = mExpirationArray[i];
uint32_t expirationTime = entry->GetExpirationTime();
if (expirationTime > 0 && expirationTime <= now) {
LOG((" dooming expired entry=%p, exptime=%u (now=%u)",
entry.get(), entry->GetExpirationTime(), now));
entry->PurgeAndDoom();
continue;
}
// not purged, move to the next one
++i;
}
}
PRUint32 nsHttpConnection::TimeToLive()
{
PRInt32 tmp = mIdleTimeout - (NowInSeconds() - mLastReadTime);
if (0 > tmp)
tmp = 0;
return tmp;
}
nsresult
nsHttpConnection::Init(nsHttpConnectionInfo *info, PRUint16 maxHangTime)
{
LOG(("nsHttpConnection::Init [this=%x]\n", this));
NS_ENSURE_ARG_POINTER(info);
NS_ENSURE_TRUE(!mConnInfo, NS_ERROR_ALREADY_INITIALIZED);
mConnInfo = info;
NS_ADDREF(mConnInfo);
mMaxHangTime = maxHangTime;
mLastReadTime = NowInSeconds();
return NS_OK;
}
// From section 13.2.4 of RFC2616, we compute the freshness lifetime of a cached
// response as follows:
//
// freshnessLifetime = max_age_value
// <or>
// freshnessLifetime = expires_value - date_value
// <or>
// freshnessLifetime = (date_value - last_modified_value) * 0.10
// <or>
// freshnessLifetime = 0
//
nsresult
nsHttpResponseHead::ComputeFreshnessLifetime(uint32_t *result) const
{
*result = 0;
// Try HTTP/1.1 style max-age directive...
if (NS_SUCCEEDED(GetMaxAgeValue(result)))
return NS_OK;
*result = 0;
uint32_t date = 0, date2 = 0;
if (NS_FAILED(GetDateValue(&date)))
date = NowInSeconds(); // synthesize a date header if none exists
// Try HTTP/1.0 style expires header...
if (NS_SUCCEEDED(GetExpiresValue(&date2))) {
if (date2 > date)
*result = date2 - date;
// the Expires header can specify a date in the past.
return NS_OK;
}
// Fallback on heuristic using last modified header...
if (NS_SUCCEEDED(GetLastModifiedValue(&date2))) {
LOG(("using last-modified to determine freshness-lifetime\n"));
LOG(("last-modified = %u, date = %u\n", date2, date));
if (date2 <= date) {
// this only makes sense if last-modified is actually in the past
*result = (date - date2) / 10;
return NS_OK;
}
}
// These responses can be cached indefinitely.
if ((mStatus == 300) || nsHttp::IsPermanentRedirect(mStatus)) {
*result = uint32_t(-1);
return NS_OK;
}
LOG(("nsHttpResponseHead::ComputeFreshnessLifetime [this = %x] "
"Insufficient information to compute a non-zero freshness "
"lifetime!\n", this));
return NS_OK;
}
~AltSvcTransaction()
{
LOG(("AltSvcTransaction dtor %p map %p running %d",
this, mMapping.get(), mRunning));
if (mRunning) {
MOZ_ASSERT(mMapping->IsRunning());
MaybeValidate(NS_OK);
}
if (!mMapping->Validated()) {
// try again later
mMapping->SetExpiresAt(NowInSeconds() + 2);
}
LOG(("AltSvcTransaction dtor %p map %p validated %d [%s]",
this, mMapping.get(), mMapping->Validated(),
mMapping->HashKey().get()));
mMapping->SetRunning(false);
}
NS_IMETHODIMP
nsPrefetchNode::OnStartRequest(nsIRequest *aRequest,
nsISupports *aContext)
{
nsresult rv;
nsCOMPtr<nsICachingChannel> cachingChannel =
do_QueryInterface(aRequest, &rv);
if (NS_FAILED(rv)) return rv;
// no need to prefetch a document that is already in the cache
PRBool fromCache;
if (NS_SUCCEEDED(cachingChannel->IsFromCache(&fromCache)) &&
fromCache) {
LOG(("document is already in the cache; canceling prefetch\n"));
return NS_BINDING_ABORTED;
}
//
// no need to prefetch a document that must be requested fresh each
// and every time.
//
nsCOMPtr<nsISupports> cacheToken;
cachingChannel->GetCacheToken(getter_AddRefs(cacheToken));
if (!cacheToken)
return NS_ERROR_ABORT; // bail, no cache entry
nsCOMPtr<nsICacheEntryInfo> entryInfo =
do_QueryInterface(cacheToken, &rv);
if (NS_FAILED(rv)) return rv;
PRUint32 expTime;
if (NS_SUCCEEDED(entryInfo->GetExpirationTime(&expTime))) {
if (NowInSeconds() >= expTime) {
LOG(("document cannot be reused from cache; "
"canceling prefetch\n"));
return NS_BINDING_ABORTED;
}
}
mState = nsIDOMLoadStatus::RECEIVING;
return NS_OK;
}
nsresult
nsHttpConnection::OnSocketReadable()
{
LOG(("nsHttpConnection::OnSocketReadable [this=%x]\n", this));
PRUint32 now = NowInSeconds();
if (mKeepAliveMask && (now - mLastReadTime >= PRUint32(mMaxHangTime))) {
LOG(("max hang time exceeded!\n"));
// give the handler a chance to create a new persistent connection to
// this host if we've been busy for too long.
mKeepAliveMask = PR_FALSE;
gHttpHandler->ProcessPendingQ(mConnInfo);
}
mLastReadTime = now;
nsresult rv;
PRUint32 n;
PRBool again = PR_TRUE;
do {
rv = mTransaction->WriteSegments(this, nsIOService::gDefaultSegmentSize, &n);
if (NS_FAILED(rv)) {
// if the transaction didn't want to take any more data, then
// wait for the transaction to call ResumeRecv.
if (rv == NS_BASE_STREAM_WOULD_BLOCK)
rv = NS_OK;
again = PR_FALSE;
}
else if (NS_FAILED(mSocketInCondition)) {
// continue waiting for the socket if necessary...
if (mSocketInCondition == NS_BASE_STREAM_WOULD_BLOCK)
rv = mSocketIn->AsyncWait(this, 0, 0, nsnull);
else
rv = mSocketInCondition;
again = PR_FALSE;
}
// read more from the socket until error...
} while (again);
return rv;
}
PRBool
nsHttpConnection::CanReuse()
{
return IsKeepAlive() && (NowInSeconds() - mLastReadTime < mIdleTimeout)
&& IsAlive();
}
