QSslSocket错误

Question

In Qt 4.8 on Windows 7 Ultimate x64, when I try to use QNetworkAccessManager to post() something over the network:

_net_acc_mgr.post(QNetworkRequest(QUrl(...)),
                  QByteArray(...));

I encounter the following run time errors:

QSslSocket: cannot resolve OPENSSL_add_all_algorithms_noconf
QSslSocket: cannot resolve OPENSSL_add_all_algorithms_conf
QSslSocket: cannot call unresolved function OPENSSL_add_all_algorithms_noconf
content-type missing in HTTP POST, defaulting to application/octet-stream

I clearly remember the same code worked couple of years ago. But I forget which version of Qt I tried.

Is there anything else require to work with QNetworkAccessManager in Qt 4.8?

Answer 1

• The QT runs on 32bit

• In Windows 64bit the folder system32 does not have the DLLs required for OpenSSL , only there in sysWOW64 folder .

• To resolve this you will need to install the binary version of OpenSSL 32 .

Download compiled for Windows (Update link):

http://slproweb.com/download/Win32OpenSSL_Light-1_0_1g.exe

Note: During install select the option "The OpenSSL binaries (/bin) directory" (Probably C:\\OpenSSL-Win32 )

After install copy DLLs (from C:\\OpenSSL-32 or %HOMEDRIVE%\\OpenSSL-32 ) for release/debug project folder:

• libeay32.dll
• libssl32.dll
• ssleay32.dll

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Another option would be to use the Mingw 64bit , but do not know if this would be feasible with the QT (this case, if you can compile the application will run only on 64bit systems).