void QgsMapCanvas::setCachingEnabled( bool enabled ) { if ( enabled == isCachingEnabled() ) return; if ( mJob && mJob->isActive() ) { // wait for the current rendering to finish, before touching the cache mJob->waitForFinished(); } if ( enabled ) { mCache = new QgsMapRendererCache; } else { delete mCache; mCache = 0; } }
void QNetworkAccessHttpBackend::replyHeaderChanged() { // reconstruct the HTTP header QList<QPair<QByteArray, QByteArray> > headerMap = httpReply->header(); QList<QPair<QByteArray, QByteArray> >::ConstIterator it = headerMap.constBegin(), end = headerMap.constEnd(); QByteArray header; for (; it != end; ++it) { QByteArray value = rawHeader(it->first); if (!value.isEmpty()) { if (it->first.toLower() == "set-cookie") value += "\n"; else value += ", "; } value += it->second; setRawHeader(it->first, value); } setAttribute(QNetworkRequest::HttpStatusCodeAttribute, httpReply->statusCode()); setAttribute(QNetworkRequest::HttpReasonPhraseAttribute, httpReply->reasonPhrase()); // is it a redirection? const int statusCode = httpReply->statusCode(); checkForRedirect(statusCode); if (statusCode >= 500 && statusCode < 600) { QAbstractNetworkCache *nc = networkCache(); if (nc) { QNetworkCacheMetaData metaData = nc->metaData(url()); QNetworkHeadersPrivate cacheHeaders; cacheHeaders.setAllRawHeaders(metaData.rawHeaders()); QNetworkHeadersPrivate::RawHeadersList::ConstIterator it; it = cacheHeaders.findRawHeader("Cache-Control"); bool mustReValidate = false; if (it != cacheHeaders.rawHeaders.constEnd()) { QHash<QByteArray, QByteArray> cacheControl = parseHttpOptionHeader(it->second); if (cacheControl.contains("must-revalidate")) mustReValidate = true; } if (!mustReValidate && sendCacheContents(metaData)) return; } } if (statusCode == 304) { #if defined(QNETWORKACCESSHTTPBACKEND_DEBUG) qDebug() << "Received a 304 from" << url(); #endif QAbstractNetworkCache *nc = networkCache(); if (nc) { QNetworkCacheMetaData oldMetaData = nc->metaData(url()); QNetworkCacheMetaData metaData = fetchCacheMetaData(oldMetaData); if (oldMetaData != metaData) nc->updateMetaData(metaData); if (sendCacheContents(metaData)) return; } } if (statusCode != 304 && statusCode != 303) { if (!isCachingEnabled()) setCachingEnabled(true); } metaDataChanged(); }