D5638: Use a single QNAM (and a disk cache) for HTTP jobs

[Dan Leinir Turthra Jensen]

leinir created this revision.
Restricted Application added a project: Frameworks.
Restricted Application added a subscriber: Frameworks.

REVISION SUMMARY
  Use a single QNetworkAccessManager instance for all our HTTP jobs, and also add a simple diskcache to that qnam. Further ensure there is only a single qnam for the entire application using kns' http jobs, across all threads (lock when accessing the qnam). Without this, we are liable to end up creating and destroying a great many qnam instances, which certainly is something to try and avoid.
  
  CCBUG: 379193

TEST PLAN
  Using Discover, which creates a great many of these jobs, we have much less network traffic this way.

REPOSITORY
  R304 KNewStuff

REVISION DETAIL
  https://phabricator.kde.org/D5638

AFFECTED FILES
  src/core/jobs/httpworker.cpp

To: leinir, whiting, apol
Cc: #frameworks
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