Window 8.1
gw2 client dowloading gw2.dat from scratch failed when trying to get files:
assetcdn.101.arenanetworks.com/program/101/1/0/930214
assetcdn.101.arenanetworks.com/program/101/1/0/930184
In both cases, the server returned an http response with header connection: close which causes the client to reset the tcp connection. As a result, the client gets stuck and never proceed to download the rest of the files.
Work around is to proxy and modify the response with header connections: keep-alive.