ZeroMQ HTTP example

cmd.sh

clang -Wall http.c -o http -L/usr/local/Cellar/zeromq/4.0.5_2/lib/ -lzmq && ./http

http.c

#include <zmq.h>
#include <string.h>
#include <assert.h>

int main (void) {
void *ctx = zmq_ctx_new ();
assert (ctx);
/* Create ZMQ_STREAM socket */
void *socket = zmq_socket (ctx, ZMQ_STREAM);
assert (socket);
int rc = zmq_bind (socket, "tcp://*:8080");
assert (rc == 0);
/* Data structure to hold the ZMQ_STREAM ID */
uint8_t id [256];
size_t id_size = 256;
while (1) {
  /* Get HTTP request; ID frame and then request */
  id_size = zmq_recv (socket, id, 256, 0);
  assert (id_size > 0);
  /* Prepares the response */
 char http_response [] =
 "HTTP/1.0 200 OK\r\n"
 "Content-Type: text/plain\r\n"
 "\r\n"
   "Hello, World!";
 /* Sends the ID frame followed by the response */
 zmq_send (socket, id, id_size, ZMQ_SNDMORE);
 zmq_send (socket, http_response, strlen (http_response), ZMQ_SNDMORE);
 /* Closes the connection by sending the ID frame followed by a zero response */
 zmq_send (socket, id, id_size, ZMQ_SNDMORE);
 zmq_send (socket, 0, 0, ZMQ_SNDMORE);
 /* NOTE: If we don't use ZMQ_SNDMORE, then we won't be able to send more */
 /* message to any client */
 }
zmq_close (socket); zmq_ctx_destroy (ctx);
}