JsonObject.dump()

[mohammadrasekh68]

Hi
the problem is when we use dump() method, when it return the string literal from the JsonObject, JsonObject will be cleaned and initialized with random values!
so if i do something like this:
std::cout<<JsonObject.dump()<<endl; //printed :{"A":{"B":"7+NNf&&8Nf!","C":"12345678913456"}} std::cout<<JsonObject.dump()<<endl; //printed : nothing or some random characters

[gregmarr]

That seems very unlikely unless JsonObject is a reference to an object that is destroyed at the end of the first statement. Do you have a full sample that demonstrates this issue?

[mohammadrasekh68]

Json postData; postData = RequestTaskDescriptionJsonNode->getJsonNode(); //RequestTaskDescriptionJsonNode is a unique_ptr,returns a JsonObject // setup the POST data cout<<"post data Check: " <<postData.dump() .c_str()); // this one works fine curl_easy_setopt( ctx , CURLOPT_POSTFIELDS , postData.dump() .c_str()); // here data packet is empty
but this behavior does not happen always, I'm not facing it right now, even the code is the same!

[nlohmann]

I would need to see more code to be able to assess this. Alternatively, can you run your code with Address Sanitizer to make sure the string you are parsing is valid?

[mohammadrasekh68]

@nlohmann unfortunately I cant run the program with Sanitizer
@kickunderscore
curl_easy_setopy is not a function but a macro
and one more thing is that we are using Dlt logging mechanism which is also a macro not a simple function.

complete code script is:

std::unique_ptr <CreateRequestJsonNode> RequestTaskDescriptionJsonNode=make_unique<CreateRequestJsonNode>();
std::unique_ptr <struct t_obu_task_description_request> request =std::make_unique<struct t_obu_task_description_request>();
	if(!m_vin.empty())
	{
		request->vin = m_vin;
	}

	if(!m_serialNumber.empty())
	{
		request->serial_number = m_serialNumber;
	}

	if(!m_password.empty())
	{
		request->obu_password = m_password;
	}

	if( RequestTaskDescriptionJsonNode->init(request))
	{
		fclose(localFile);
		DLTLOG(DLT_LOG_ERROR,"error on create task description request");
		return EXIT_DATA_ERROR;
	}
	postData = RequestTaskDescriptionJsonNode->getJsonNode();
	DLTLOG(DLT_LOG_INFO,"post data Check: " ,postData .c_str());
	curl_easy_setopt( ctx , CURLOPT_POSTFIELDS , postData .c_str());

[stale]

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