From 1a75d7cde5bf7fb97abb188300e2a56b5b9963bf Mon Sep 17 00:00:00 2001 From: Peter Hartmann Date: Wed, 4 May 2011 13:49:51 +0200 Subject: HTTP cache backend: do not load resources that must be revalidated The header field "Cache-Control: must-revalidate" is a strict requirement for loading the resource from the server, and not reading it from the cache without revalidating first. With this patch, PreferCache will load such from the network instead of loading them from the cache, and AlwaysCache will throw a ContentNotFound error. Reviewed-by: Markus Goetz Task-number: QTBUG-18983 --- src/network/access/qnetworkaccesscachebackend.cpp | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/src/network/access/qnetworkaccesscachebackend.cpp b/src/network/access/qnetworkaccesscachebackend.cpp index 13f4cd9..c585848 100644 --- a/src/network/access/qnetworkaccesscachebackend.cpp +++ b/src/network/access/qnetworkaccesscachebackend.cpp @@ -66,6 +66,7 @@ void QNetworkAccessCacheBackend::open() QString msg = QCoreApplication::translate("QNetworkAccessCacheBackend", "Error opening %1") .arg(this->url().toString()); error(QNetworkReply::ContentNotFoundError, msg); + } else { setAttribute(QNetworkRequest::SourceIsFromCacheAttribute, true); } finished(); @@ -85,14 +86,18 @@ bool QNetworkAccessCacheBackend::sendCacheContents() QNetworkCacheMetaData::AttributesMap attributes = item.attributes(); setAttribute(QNetworkRequest::HttpStatusCodeAttribute, attributes.value(QNetworkRequest::HttpStatusCodeAttribute)); setAttribute(QNetworkRequest::HttpReasonPhraseAttribute, attributes.value(QNetworkRequest::HttpReasonPhraseAttribute)); - setAttribute(QNetworkRequest::SourceIsFromCacheAttribute, true); // set the raw headers QNetworkCacheMetaData::RawHeaderList rawHeaders = item.rawHeaders(); QNetworkCacheMetaData::RawHeaderList::ConstIterator it = rawHeaders.constBegin(), end = rawHeaders.constEnd(); - for ( ; it != end; ++it) + for ( ; it != end; ++it) { + if (it->first.toLower() == "cache-control" && + it->second.toLower().contains("must-revalidate")) { + return false; + } setRawHeader(it->first, it->second); + } // handle a possible redirect QVariant redirectionTarget = attributes.value(QNetworkRequest::RedirectionTargetAttribute); -- cgit v0.12