diff options
author | Richard Moore <rich@kde.org> | 2013-02-04 22:28:59 +0000 |
---|---|---|
committer | The Qt Project <gerrit-noreply@qt-project.org> | 2013-02-20 22:19:43 +0100 |
commit | 4030b6339c3dae4474f60b07700526fccf428b0c (patch) | |
tree | 7dd59543e59446c9d8ef0c09ad51618126dfc873 /src/network | |
parent | b92d951bb16bb690daa20d13f1638ff3500f41eb (diff) |
Allow QHostInfo::lookupHost() with no receiver to warm the DNS cache.
This change lets you call QHostInfo::lookupHost() with a null receiver
in order to warm up the DNS cache. This allows you to try to get the
DNS request in flight early.
Change-Id: Icfdd28146479aa534ae9ceb472f75e08aaa39cd2
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/network')
-rw-r--r-- | src/network/kernel/qhostinfo.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/network/kernel/qhostinfo.cpp b/src/network/kernel/qhostinfo.cpp index d9d8396011..d25372ece6 100644 --- a/src/network/kernel/qhostinfo.cpp +++ b/src/network/kernel/qhostinfo.cpp @@ -164,6 +164,9 @@ int QHostInfo::lookupHost(const QString &name, QObject *receiver, int id = theIdCounter.fetchAndAddRelaxed(1); // generate unique ID if (name.isEmpty()) { + if (!receiver) + return -1; + QHostInfo hostInfo(id); hostInfo.setError(QHostInfo::HostNotFound); hostInfo.setErrorString(QCoreApplication::translate("QHostInfo", "No host name given")); @@ -183,6 +186,9 @@ int QHostInfo::lookupHost(const QString &name, QObject *receiver, bool valid = false; QHostInfo info = manager->cache.get(name, &valid); if (valid) { + if (!receiver) + return -1; + info.setLookupId(id); QHostInfoResult result; QObject::connect(&result, SIGNAL(resultsReady(QHostInfo)), receiver, member, Qt::QueuedConnection); @@ -193,7 +199,8 @@ int QHostInfo::lookupHost(const QString &name, QObject *receiver, // cache is not enabled or it was not in the cache, do normal lookup QHostInfoRunnable* runnable = new QHostInfoRunnable(name, id); - QObject::connect(&runnable->resultEmitter, SIGNAL(resultsReady(QHostInfo)), receiver, member, Qt::QueuedConnection); + if (receiver) + QObject::connect(&runnable->resultEmitter, SIGNAL(resultsReady(QHostInfo)), receiver, member, Qt::QueuedConnection); manager->scheduleLookup(runnable); } return id; |