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QNetworkAccessManager : server closed some connections prematurely
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I made 24 requests to the network through QNetworkAccessManager::get() by a for-loop,after a few minutes later,the remote server closed some connections prematurely before the entire reply was received and processed,then the queued/pending download tasks cannot be done,
so is there any anyway to allow me download all the files these links direct to without letting the server closed some connections prematurely ?here is the 24 request links(may be already expired)
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http://119.145.138.182/youku/67811C7C45D14A82B3725284353/03000218104D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://121.12.89.51/youku/677677304654674F299B82C3D/03000218024D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://113.107.113.136/youku/677C1F7A44C3A81942BD642D08/03000218094D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://121.12.89.44/youku/65811C7C49674474CDE15834D5/03000218124D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://117.27.153.210/youku/6779B2C8E65497973D8405F92/03000218064D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://121.12.89.12/youku/6774D964A324C7560B1EC303A/03000218004D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://124.232.154.144/youku/65740A7E83D4E847C51CDD6AB5/03000218014D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://183.60.145.13/youku/658136590892317C7B95E533B8/03000218144D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://113.107.113.83/youku/6979B2C856D3181545A30657CD/03000218044D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://110.80.131.84/youku/6581296AAB6536811E99E3646F0/03000218134D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://183.60.145.19/youku/6575A84A6DB3B7F15567C28C5/03000218034D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://110.80.131.17/youku/69811C7C4DAF328108F7BC96EC3/030002180E4D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://124.232.154.132/youku/67817700E7473E838DB4FDA3B28/03000218174D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://124.232.154.182/youku/677DBD466B83583077D8B76023/030002180B4D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://110.80.131.15/youku/65810F8DE7AC42815F7CD7E6CB7/03000218114D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://183.61.6.232/youku/698183EF488F4781254747C3842/03000218164D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://120.37.140.115/youku/6578E3E2ABB31782AB906256A/03000218074D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://121.12.89.14/youku/697A81AE8D03773DF38D84136/03000218054D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://121.12.89.110/youku/677B50948C54C7560CEA261B7/03000218084D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://113.106.202.73/youku/69810F8DEBF44A8202A46144A2B/030002180D4D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://183.60.145.20/youku/677CEE607CC45811AF163742A4/030002180A4D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://113.103.44.108/youku/6981296AA5A634815C043313463/030002180F4D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://183.60.145.201/youku/6981029F8F0247812346E023EAB/030002180C4D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
http://121.12.89.18/youku/69817700E5E53873F194D5637D/03000218154D86756800B7019B3998DC9D450D-7CC6-5616-5022-461BD12BA794.flv
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What happens if you download those files at the same time from a web browser? Do you manage to complete them?
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QNetworkAccessManager queues the requests it receives. The number of requests executed in parallel is dependent on the protocol. Currently, for the HTTP protocol on desktop platforms, 6 requests are executed in parallel for one host/port combination.
so some tasks are hanged at first.
I just let the QNetworkAccessManager to manage them, do no interference to the behavior of QNetworkAccessManager.[quote author="JKSH" date="1417494372"]What happens if you download those files at the same time from a web browser? Do you manage to complete them?[/quote]
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Yes, I know about the queue management system
I asked because some servers don't like multiple connections from the same client. For one application, I had to implement my own queue manager to download only one file at a time. Otherwise, my connection would sometimes close prematurely.
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the server does support multiple connections from the same client,the reason here for the connections closed prematurely perhaps is some tasks are hanged so there is no data transfer in the connections, so the server closed some connections prematurely ,while QNetworkAccessManager doesn't recreate the connection.
