a simple http server with libevent

I'm starting my "stupid code tricks" by digging into libevent. This is how I wrote my first http server that should be able to quickly serve zillions of requests:

1. Download lib event, extract it, make configure, make install.

2. simple.c:

#include <stdio.h>
#include <stdlib.h>
#include "event.h"
#include "evhttp.h"

short          http_port = 9999;
char          *http_addr = "127.0.0.1";
struct evhttp *http_server = NULL;

void request_handler(struct evhttp_request *req, void *arg)
{
  struct evbuffer *evb = evbuffer_new();
  fprintf(stdout, "Request for %s from %s\n", req->uri, req->remote_host);
  evbuffer_add_printf(evb, "garbage");
  evhttp_send_reply(req, HTTP_OK, "Hello", evb);
  evbuffer_free(evb);
  return;
}

int main (int argc, const char * argv[]) {

  event_init();
  http_server = evhttp_start(http_addr, http_port);
  if (http_server == NULL) {
    fprintf(stderr, "Error starting http server on port %d\n", http_port);
    exit(1);
  }

  evhttp_set_gencb(http_server, request_handler, NULL);

  fprintf(stderr, "Server started on port %d\n", http_port);

  event_dispatch(); 

  return 0;
}

3. Write a makefile:

INCDIRS =       -I/usr/local/include
CC =            gcc
CFLAGS =        $(INCDIRS) -Wall -g -O2
LIBS =          /usr/local/lib/libevent.a

all: simple

simple: simple.o
        $(CC) $(CFLAGS) simple.o -g -O2 -o $@ $(LIBS)

%.o : %.c
        $(CC) $(CFLAGS) -c $<

clean:
        rm -f *.o simple

4. run it: ./simple

5. point a web browser to http://127.0.0.1:9999

That's it. More to come soon.