how to handle chrome.runtime.sendNativeMessage() in native app

Question

I am working on native messaging host. I am able to launch my custom application by using api

var port = chrome.runtime.connectNative('com.my_company.my_application');

I can post message to my custom app by using api

port.postMessage({ text: "Hello, my_application" });

I know they are using input/out stream to send and receive messages. how should my native application(c or c++ exe) will get notify about message received which function/ event should i handle to receive message.

Answer 1

I am posting c++ code which will communicate i.e receives and sends the messages to chrome extension. Hope this will help to other developer

int _tmain(int argc, _TCHAR* argv[])
{
    cout.setf( std::ios_base::unitbuf ); //instead of "<< eof" and "flushall"
    _setmode(_fileno(stdin),_O_BINARY);


    unsigned int c, i, t=0;
    string inp;  
    bool bCommunicationEnds = false;

    bool rtnVal = true;
    do {

        inp="";
        t=0;
        //Reading message length 
        cin.read(reinterpret_cast<char*>(&t) ,4);

        // Loop getchar to pull in the message until we reach the total
        //  length provided.
        for (i=0; i < t; i++) {
            c = getchar();
            if(c == EOF)
            {
                bCommunicationEnds = true;
                i = t;
            }
            else
            {
                inp += c;
            }
        }

         if(!bCommunicationEnds)
        {
            //Writing Message length
            cout.write(reinterpret_cast<char*>(&inp),4); 
            //Write original message.
            cout<<inp;
        }
    }while(!bCommunicationEnds);
    return 0;
}