JSON requests in C using libcurl

Question

I\'m defining a PUT request with a JSON request body using libcurl in C.

This how I\'m doing it:

    sprintf(jsonObj, \"\\\"name\\\" : \\\"%s\\\", \\         


        

Answer 1

A key part of understanding whether the system is behaving correctly is seeing what the program is actually sending over the network. So another way to check the byte stream, instead of pointing it at your server (and/or running Wireshark), is to just run a netcat instance in a separate window on the test machine:

nc -l 8080

and point the code (CURLOPT_URL) at "http://localhost:8080".

You'll need to hit Control-D in the nc window to terminate the connection so that curl completes, but you can also type a test return text beforehand, which can be useful if you're expecting some sort of reply to test against.