I thought firstly sending byte data seperated by comma then, on server, I could make string data to image byte .
targetUrl is http://camerauploading.herokuapp.com/pic and work find with postman test(sending sth with post)
Node js server is as below
and for postman post Test. it comes to pic come logs and request method is logged as POST .
but once I request post. I didn't reach here and httpCode result is -1 . not 200
app.post('/pic',function(request,response){
console.log("pic come");
console.log(request.method);
if (request.method === 'POST') {
}
}