Пример #1
0
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;
  }
}
Пример #2
0
PRUint32 nsHttpConnection::TimeToLive()
{
    PRInt32 tmp = mIdleTimeout - (NowInSeconds() - mLastReadTime);
    if (0 > tmp)
        tmp = 0;

    return tmp;
}
Пример #3
0
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;
}
Пример #4
0
// 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;
}
Пример #5
0
  ~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);
  }
Пример #6
0
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;
}
Пример #7
0
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;
}
Пример #8
0
PRBool
nsHttpConnection::CanReuse()
{
    return IsKeepAlive() && (NowInSeconds() - mLastReadTime < mIdleTimeout)
                         && IsAlive();
}