POST request from curl example

Damian7546

Hi,
I got example the request like below:

curl --request POST \
  --url https://demo1.vnetlpr.pl/api/events/search \
  --header 'Accept: application/json' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data public_key=01932182-8a75-7238-9b04-e969bcb9e9e6 \
  --data 'hash=MD5( public_key + private_key )' \

do I prepared the same code like above but in in qt ?

QNetworkRequest request;
request.setUrl(QUrl("https://demo1.vnetlpr.pl/api/events/search"));
request.setRawHeader("Accept", "application/json");
request.setRawHeader("Content-Type", "application/x-www-form-urlencoded");

QJsonObject obj;
obj["public_key"] = (QString)publicKey;
obj["hash"]= (QString)QCryptographicHash::hash(publicKey + privateKey, QCryptographicHash::Md5);

QNetworkReply *reply = manager.post(request, QJsonDocument(obj).toJson());

Damian7546

You're right. The request body it doesn't in JSON notation.

I rewrote my code like below:

QNetworkRequest request;
request.setUrl(QUrl("https://demo1.vcn.pl/api/events/search"));
request.setRawHeader("Accept", "application/json");
request.setRawHeader("Content-Type", "application/x-www-form-urlencoded");

QByteArray md5 = QCryptographicHash::hash(publicKey + privateKey, QCryptographicHash::Md5);
auto ba = QByteArray("public_key="+publicKey+"&hash="+md5);

QNetworkReply *reply = manager.post(request,ba);

Now is the same what in example in the first post ?

hskoglund

Hi, the .setRawHeader()s look ok but QJson? I don't see any colons etc. in the curl example, the --data lines seem to be vanilla params, so try something like:

auto ba = QByteArray("public_key=01932182-8a75-7238-9b04-e969bcb9e9e6&hash=MD5( public_key + private_key )");
QNetworkReply *reply = manager.post(request, ba);

SGaist

Hi,

@Damian7546 said in POST request from curl example:

obj["public_key"] = (QString)publicKey;
obj["hash"]= (QString)QCryptographicHash::hash(publicKey + privateKey, QCryptographicHash::Md5);

Beside the good points made by @hskoglund, this is pretty wrong. You can't type cast a QByteArray as a QString like that.

Damian7546

You're right. The request body it doesn't in JSON notation.

I rewrote my code like below:

QNetworkRequest request;
request.setUrl(QUrl("https://demo1.vcn.pl/api/events/search"));
request.setRawHeader("Accept", "application/json");
request.setRawHeader("Content-Type", "application/x-www-form-urlencoded");

QByteArray md5 = QCryptographicHash::hash(publicKey + privateKey, QCryptographicHash::Md5);
auto ba = QByteArray("public_key="+publicKey+"&hash="+md5);

QNetworkReply *reply = manager.post(request,ba);

Now is the same what in example in the first post ?

Damian7546

This post is deleted!

SGaist

Did you check the server logs ?
Did you connect the reply errorOccured and sslErrors signals ?

Damian7546

@SGaist working! Tahnks for help.

SGaist

What did you do to fix the problem ?

Damian7546

@SGaist In Ubuntu (where I developing my app) I had a problem with ssl, and below solution fixed my problem:
https://forum.qt.io/topic/144102/qsslsocket-failure-from-online-installer-version-ubuntu/8

And added to *.pro file:

LIBS += -L/opt/openssl-1.1.1q -lcrypto 
LIBS += -L/opt/openssl-1.1.1q -lssl

I have no idea how to run it on my destinatiom machine based on Debian System ....

To generate file to my destination machine I use CQtDeployer , which one generate below directories:
Bez tytułu.jpg
but inside I do not see any files related with ssl.

@SGaist What can I do ?

SGaist

@Damian7546 you don't . You have to deploy the libraries along with your application.

Damian7546

@SGaist hmm... but I do not know how....

JonB

@Damian7546 Start by looking at the alternatives mentioned in https://forum.qt.io/topic/154740/where-is-linuxdeployqt

Damian7546

@JonB I Use CQtDeployer.
I am currently using two options:
cqtdeployer -bin -qmlDir
To add libs from my .pro file :
LIBS += -L/opt/openssl-1.1.1q -lcrypto
LIBS += -L/opt/openssl-1.1.1q -lssl

Which one options I should add ? -libDir or -extraLibs ?

Damian7546

@JonB @SGaist

I copied dictionary with ssl library to my qt project location:

.../Lib/openssl-1.1.1q

And changed the *.pro file to:

LIBS += -L$$PWD/Lib/openssl-1.1.1q/ -lcrypto
LIBS += -L$$PWD/Lib/openssl-1.1.1q/ -lssl

Application works , when is runnig form qt creator . But when I run without qt creator it doesnt work ...

JonB

@Damian7546
Assuming by "doesnt work" you mean you are told it cannot find the OpenSSL shared libraries at runtime.

Then the implication is that the environment/search path is somehow different from Creator than without. E.g. check your LD_LIBRARY_PATH.

From a terminal try running ldd on your executable. Does that show it requiring certain *.so files which cannot be found?

I believe the OpenSSL runtime provides some runtime openssl.so (or whatever name) file(s). Find these.

I copied dictionary with ssl library to my qt project location:

That may be enough for linking, but I don't think it is for locating the .so files at runtime under Linux. Unless they are picked up off the RPATH which was linked into the program.

Damian7546

@JonB Now work!

I copied from: ..../Lib/openssl-1.1.1q below files:
libcrypto.so
libcrypto.so.1.1
libssl.so
libssl.so.1.1

to my deployed application

It look like by default, an SSL library are dynamically loads any installed OpenSSL library at run-time.

SGaist

Yes, by default Qt builds dlopens OpenSSL.