File descriptor does write data in C - c

Question

I am using the joyent http-parser and lib event to create my own simple web server in C.
I have it connecting to the port and receiving the HTTP requests fine, however, I am not able to send a response using the socket.
So in one window I enter:
$ curl localhost:5555/a.txt
and in my server I receive and correctly handled it. TO the point I do the following:
http_data_cb* message_complete_req_callback(http_parser* parser)
{
int i;
http_request_t* http_request = parser->data;
http_response_t* http_response = generate_response(http_request);
printf("Writing %d:\n%s", strlen(http_response->full_message), http_response->full_message);
i = write(http_request->fd, http_response->full_message, strlen(http_response->full_message));
fsync(http_request->fd);
printf("Wrote: %d\n", i);
return 0;
}
Which prints the following:
Writing 96:
HTTP/1.0 200 OK
Tue, 04 Aug 2015 10:20:58 AEST
Server: mywebserver/jnd
Connection: close
Wrote: 96
However my curl instance doesn't receive anything. Any ideas?
Thanks in advance.

Answer 1

Your response contains no data, just headers. Curl strips off the headers and just prints the content. Not only that but you're responding with HTTP/1.0 which is a long way out of date. As it happens, the Connection: close only makes sense in 1.1 as 1.0 does not support keeping a connection open.
For curl to report anything you need to send some content. I'd expect the output to be something like:
Writing 128:
HTTP/1.1 200 OK
Tue, 04 Aug 2015 10:20:58 AEST
Server: mywebserver/jnd
Connection: close
Content-Length: 12
Hello World
Wrote: 128
Which would trigger curl to print:
Hello World
Notice the 12 character content length includes 1 character for the line feed. The content is Hello World<lf>.