How to create special json format to post

[J.Hilk]

@ztencmcp can you save the "correct" string to a file and show that one to us?

It's still very confusing, what the actual problem is!

[JKSH]

@ztencmcp said in How to create special json format to post:

the server responses json format error when i post data with QNetworkAccessManager.

How do you post? Please show the code from document.setObject(json); to QNetworkAccessManager::post()

[JonB]

@ztencmcp
I don't know, I'm not a JSON expert, but like @Christian-Ehrlicher I thought the JSON you show would not be valid. Look at this bit:

/"username/": /"admin/"

You have a / outside the quoted string for both the property name & value. Is that really correct??

[ztencmcp]

@jsulm(

you can see the pic, the right one i created it with cpprestsdk web::json::value serialize() fucntion, the wrong one i created it with qt5 QJsonObject。http server only accepts the right one。

[KroMignon]

@ztencmcp This does not really answer the question, please show the C++ code you have used to send the JSON string to your server.
Perhaps you can capture the TCP stream with WireShark to see what is really transmitted to the web server.

[ztencmcp]

@JKSH
here's the code. Thanks.

And i used cpprestsdk to do the same thing and it's right.

[J.Hilk]

@ztencmcp

When you look at the content of the QByteArray

You'll see, there is no " at the beginning or at the end. The Qt creates the same "JSON string" as cpprestsdk

the error is somewhere else.

[JonB]

@ztencmcp
Can we please be clear about one thing: in your first code it used /", in the stuff you are pasting now it uses \". Are you saying that in JSON one can use either / or \ as the "escape" character??

[ztencmcp]

@KroMignon Thanks for advice, pls see the pics below.

[KroMignon]

@ztencmcp You did NOT specify in your POST request the format!

QNetworkRequest request(QUrl("https://example.com"));
request.setRawHeader("User-Agent", "My app name v0.1");
request.setRawHeader("X-Custom-User-Agent", "My app name v0.1");
request.setRawHeader("Content-Type", "application/json");
request.setRawHeader("Content-Length", postdata.size());
manager->post(request, postdata);

or

QNetworkRequest request(QUrl("https://example.com"));
request.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");
manager->post(request, postdata);

Should do the job!

[ztencmcp]

@KroMignon Thanks, let me try.