Thread: Unicode c++, unable to write to the pipe.

Goal: To be able to send the data to the pipe after serializing using msgpack(have attached the link to the header files).


insert

Code:

LPDWORD  lpNumberOfBytesWritten = 0;
CStringA strEvalResultW= "abcdefghijklmnopqrstuwxyz";
        
        //// serialize the object into the buffer.
        //// any classes that implements write(const char*,size_t) can be a buffer.
    std::stringstream buffer;
    msgpack::type::tuple<std::string, std::string> src("SECURITY_BASELINE_BLOB", (LPCSTR)strEvalResultW);
    msgpack::pack(buffer,src);
        
    printf("\n\nThe length of the string is %ld \n\n", strlen(strEvalResultW));
    BOOL result = WriteFile(hPipe, (LPCVOID)buffer.str(), strlen(buffer), lpNumberOfBytesWritten, NULL);
    if (result) {
        printf("\Successfully wrote to the pipe \n");
    }

I am fairly new to unicode in c++ and very confused about why I am not getting the right arguments for writeFile..(I am trying to write to a pipe and have been able to connect to the pipe successfully, hPipe is the handler to the pipe).

I want to be able to send the packed data(using msg pack available at NuGet Gallery
| msgpack-c 0.5.9.1 ) to the pipe. Any help will be really appreciated and I am willing to provide more details if needed. I am not too sure of the highlighted code as well. The highlighted code in writeFile is failing.

Code:

LPDWORD  lpNumberOfBytesWritten = 0;
CStringA testString= "abcdefghijklmnopqrstuwxyz";
        
        
msgpack::sbuffer buffer;    LPCSTR toWrite = testString;

msgpack::pack(buffer,toWrite);
        
printf("\n\nThe length of the string is %ld \n\n", strlen(strEvalResultW));
BOOL result = WriteFile(hPipe, buffer.data(), buffer.size(), lpNumberOfBytesWritten, NULL);
    if (result) {
        printf("\Successfully wrote to the pipe \n");
    }

I have edited the question, I also don't clearly understand what you mean. Can you help me with this?

I already have some string in CStringA. My main goal is to be able to serialize this data using msgpack (MessagePack: It's like JSON. but fast and small.) and be able to send it to the pipe. The reason I am using the nuget package is for the header files.

Thank you for the suggestion for the numberOfBytesWritten, I agree with the change.
Also, to answer your question, yes I am knowingly using ATL/MFC because the code already uses it and I am just trying to add the functionality to send it to the pipe. I have replaced the CStringA with some random string in this case.

The pipe can accept data in fluentd protocol only(hence using msgpack) in my case. I basically want to pack(serialize this data) and send it across.

Thank you so much for your reply. Any help would be appreciated. I am fairly new to Unicode and even though I am reading a lot about it, I am not understanding how to send that data.

Got it, so you are saying that UTF-8 is not a problem in this case. I am just trying to understand how to send the data using msgpack.Initially, I thought the way my data is formatted could be a problem...
In that case, if I want to use the msgpack-c "pack" function, can I change the name of the thread or create a new thread for the same?

Also, thank you so much for your prompt replies Means a lot!