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[Bug 1470700] Re: QNetworkAccessManager hangs when in flight mode

 

Here's the net-test compiled for the phone, which I've used to test the
problem, and which shows the bug would be fixed with the current set of
patches in 032.

** Attachment added: "net-test binary"
   https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1470700/+attachment/4521200/+files/net-test.arm

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https://bugs.launchpad.net/bugs/1470700

Title:
  QNetworkAccessManager hangs when in flight mode

Status in qtbase-opensource-src package in Ubuntu:
  Confirmed
Status in thumbnailer package in Ubuntu:
  Triaged

Bug description:
  Testing the fix:

  - Update rc-proposed (vivid) to citrain device-upgrade 32 0000
  - Optional: If you want to test using the 'generic' bearer plugin instead of the Network Manager bearer, either do not upgrade ubuntu-touch-session or move away the file /etc/profile.d/qt_networkmanager_bearer.sh
  - Reboot

  ---

  When my phone is in flight mode, HTTP requests made using
  QNetworkAccessManager seem to hang rather than erroring out
  immediately.

  From my tests, it looks like the HTTP request is blocked until the
  flight mode is disabled and a network connection is reestablished.
  This is contrary to the documentation, which states:

  """If the network is not accessible the network access manager will
  not process any new network requests, all such requests will fail with
  an error. Requests with URLs with the file:// scheme will still be
  processed."""

  http://doc.qt.io/qt-5/qnetworkaccessmanager.html#networkAccessible-
  prop

  By running strace on my test program, it doesn't even look like it
  attempts to open a TCP connection when blocked in flight mode.

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References