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Qt-interest Archive, June 2007
QSslSocket errors while using QHttp subclass

Message 1 in thread

I'm using Qt 4.3.0 with Visual Studio 2002 on Windows XP, in the process
of migrating an application from Qt 3 to Qt 4.

I get the following errors while making a QHttp get request:

   Error:QtWarningMsg: QSslSocket: cannot find ssleay32 library:
QLibrary::load_sys: 
   Cannot load ssleay32 (The specified module could not be found.)
   QSslSocketBackendPrivate::ensureInitialized: unable to resolve all
symbols

I'm aware that these are coming from qsslsocket_openssl.cpp, but I don't
really understand why I'm getting them. 

Before I continue with debugging and tracking down the source of the
problem -- any ideas? I've found some threads in qt-interest that
mention errors like these, but they don't really explain why the errors
are happening in the first place.

I can run the Qt network/http example without any problems.

The following is in my .pro file, by the way:

QT += network \
	qt3support \
	xml 

Sam Dutton
 





SAM DUTTON
SENIOR SITE DEVELOPER

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LONDON
WC1X 8XZ
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T +44 (0)20 7430 4496
F 
E SAM.DUTTON@xxxxxxxxx
WWW.ITN.CO.UK
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Message 2 in thread

On Saturday 23 June 2007 03:17, Dutton, Sam wrote:
> I'm using Qt 4.3.0 with Visual Studio 2002 on Windows XP, in the process
> of migrating an application from Qt 3 to Qt 4.
>
> I get the following errors while making a QHttp get request:
>
>    Error:QtWarningMsg: QSslSocket: cannot find ssleay32 library:
> QLibrary::load_sys:
>    Cannot load ssleay32 (The specified module could not be found.)
>    QSslSocketBackendPrivate::ensureInitialized: unable to resolve all
> symbols
>
> I'm aware that these are coming from qsslsocket_openssl.cpp, but I don't
> really understand why I'm getting them.
They are telling you that QtNetwork is built to use OpenSSL (through 
QSslSocket and friends) but that the necessary library (ssleay32) can't be 
found.

I'm not sure I understand how you built your Qt 4.3.0, but if you used a 
binary and don't have OpenSSL installed, that could explain it. Otherwise, I 
can only suggest you need to change some Windows setting so Qt can find the 
right library. Can't suggest how you might do that though.

Brad

Attachment:

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Description: PGP signature

Message 3 in thread

>> I'm not sure I understand how you built your Qt 4.3.0, but if you
used a binary and don't have OpenSSL installed, that could explain it <<

I installed from the binary.

I haven't installed OpenSSL, but I'm puzzled why the network/http
example runs without error whereas my app (apparently) needs ssleay32.

Sam


 





SAM DUTTON
SENIOR SITE DEVELOPER

200 GRAY'S INN ROAD
LONDON
WC1X 8XZ
UNITED KINGDOM
T +44 (0)20 7430 4496
F 
E SAM.DUTTON@xxxxxxxxx
WWW.ITN.CO.UK

-----Original Message-----

From: Brad Hards [mailto:bradh@xxxxxxxxxxxxx] 
Sent: Monday 25 June 2007 09:21
To: qt-interest@xxxxxxxxxxxxx
Cc: Dutton, Sam
Subject: Re: QSslSocket errors while using QHttp subclass

On Saturday 23 June 2007 03:17, Dutton, Sam wrote:
> I'm using Qt 4.3.0 with Visual Studio 2002 on Windows XP, in the 
> process of migrating an application from Qt 3 to Qt 4.
>
> I get the following errors while making a QHttp get request:
>
>    Error:QtWarningMsg: QSslSocket: cannot find ssleay32 library:
> QLibrary::load_sys:
>    Cannot load ssleay32 (The specified module could not be found.)
>    QSslSocketBackendPrivate::ensureInitialized: unable to resolve all 
> symbols
>
> I'm aware that these are coming from qsslsocket_openssl.cpp, but I 
> don't really understand why I'm getting them.
They are telling you that QtNetwork is built to use OpenSSL (through
QSslSocket and friends) but that the necessary library (ssleay32) can't
be found.

I'm not sure I understand how you built your Qt 4.3.0, but if you used a
binary and don't have OpenSSL installed, that could explain it.
Otherwise, I can only suggest you need to change some Windows setting so
Qt can find the right library. Can't suggest how you might do that
though.

Brad
Please Note:

 

Any views or opinions are solely those of the author and do not necessarily represent 
those of Independent Television News Limited unless specifically stated. 
This email and any files attached are confidential and intended solely for the use of the individual
or entity to which they are addressed. 
If you have received this email in error, please notify postmaster@xxxxxxxxx 

Please note that to ensure regulatory compliance and for the protection of our clients and business,
we may monitor and read messages sent to and from our systems.

Thank You.

--
 [ signature omitted ]
Message 4 in thread

Hi,

> I installed from the binary.
> 
> I haven't installed OpenSSL, but I'm puzzled why the network/http
> example runs without error whereas my app (apparently) needs ssleay32.

Maybe your app attempts to use HTTPS, not HTTP. This could be caused either 
explicitly by your code or implicitly by Qt code you're calling. It's hard to 
tell more without an example that reproduces the problem.

--
 [ signature omitted ]