Thanks for all responses. Now, I know that i should separate my file into multiple parts and send each part separately. I recently experienced sending several messages using consecutive write commands, like below:
socket.write(data1); socket.write(data2); socket.write(data3); ... However, the receiver only receives the last message (e.g. data3) and other messages are gone!. I also used 'socket.waitForBytesWritten()' after each 'socket.write()', but it didn't help. For this reason, i decided to send all data as one message. How can i execute consecutive writes to a socket? Thanks. On Sat, May 30, 2020 at 5:19 AM Thiago Macieira <thiago.macie...@intel.com> wrote: > On Friday, 29 May 2020 16:29:13 PDT Ghobad Zarrinchian wrote: > > Dear all, > > I'm writing a client/server application in which the client can send a > file > > to the server. At the client side, my code is something like below: > > > > QFile fl(file_name); > > > > fl.open(QIODevice::ReadOnly); > > > > QByteArray fileBytes = fl.readAll(); > > > > socket->write(fileBytes); > > > > fl.close(); > > > > And at the server side, the code that receives the file is something like > > this: > > > > QByteArray data = client_socket->readAll(); > > QFile > fl(file_name);fl.open(QIODevice::WriteOnly);fl.write(data);fl.close(); > > > > While the code above works well with text files, it does not work for > > other file types (like JPG and PDF files). What is the problem? How > > should i modify the code so that it works for all kinds of files? > > Most likely you didn't wait for the socket to finish receiving everything > before you called readAll(). Insert a waitForDisconnected() before that > readAll() and you should receive just fine. > > Alternatively, and probably better, you could write to the file after > every > readyRead() is emitted. That eliminates the need to buffer the entire file > in > memory on the receiver side, while receiving. > > Avoiding the buffering on the sender side is let as an exercise for the > reader. > > -- > Thiago Macieira - thiago.macieira (AT) intel.com > Software Architect - Intel System Software Products > > > > _______________________________________________ > Interest mailing list > Interest@qt-project.org > https://lists.qt-project.org/listinfo/interest >
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