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Geo lookup: make the QNetworkAccessManager a static object

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According to Qt's docs, the QNetworkAccessManager is supposed
to be a long-living object. Therefore, don't create one on
every geo-lookup, but a single object for all geo-lookups.

By making the object function-local it is only initiaized
on first use. Morover this limits the amount of concurrent
geo lookups.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2018-10-11 20:07:20 +02:00 • committed by Dirk Hohndel
parent ce8199cdfd
commit cb2f09a8e3
1 changed files with 6 additions and 5 deletions
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11
core/divesitehelpers.cpp
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@ -22,8 +22,11 @@
void reverseGeoLookup()
{
// By making the QNetworkAccessManager static and local to this function,
// only one manager exists for all geo-lookups and it is only initialized
// on first call to this function.
static QNetworkAccessManager rgl;
QNetworkRequest request;
QNetworkAccessManager *rgl = new QNetworkAccessManager();
QEventLoop loop;
QString geonamesURL("http://api.geonames.org/findNearbyPlaceNameJSON?lang=%1&lat=%2&lng=%3&radius=50&username=dirkhh");
QString geonamesOceanURL("http://api.geonames.org/oceanJSON?lang=%1&lat=%2&lng=%3&radius=50&username=dirkhh");
@ -38,7 +41,7 @@ void reverseGeoLookup()
// first check the findNearbyPlaces API from geonames - that should give us country, state, city
request.setUrl(geonamesURL.arg(uiLanguage(NULL).section(QRegExp("[-_ ]"), 0, 0)).arg(ds->latitude.udeg / 1000000.0).arg(ds->longitude.udeg / 1000000.0));
QNetworkReply *reply = rgl->get(request);
QNetworkReply *reply = rgl.get(request);
timer.setSingleShot(true);
QObject::connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
timer.start(5000); // 5 secs. timeout
@ -114,7 +117,7 @@ void reverseGeoLookup()
}
// next check the oceans API to figure out the body of water
request.setUrl(geonamesOceanURL.arg(uiLanguage(NULL).section(QRegExp("[-_ ]"), 0, 0)).arg(ds->latitude.udeg / 1000000.0).arg(ds->longitude.udeg / 1000000.0));
reply = rgl->get(request);
reply = rgl.get(request);
QObject::connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
timer.start(5000); // 5 secs. timeout
loop.exec();
@ -161,6 +164,4 @@ void reverseGeoLookup()
clear_reply:
reply->deleteLater();
rgl->deleteLater();
}