从张宴的http://blog.s135.com/httpsqs/
看到了libevent可以快速实现一个http服务器。后来又从搜搜evhttp的例子。拿ab测了测，速度还不错。比Nginx模块稍慢。
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <err.h>
#include <event.h>
#include <evhttp.h>
void now_handler(struct evhttp_request *req, void *arg)
{
struct evbuffer *buf;
buf = evbuffer_new();
if (buf == NULL)
err(1, "failed to create response buffer");
evbuffer_add_printf(buf, "zlj");
evhttp_send_reply(req, HTTP_OK, "OK", buf);
}
int main(int argc, char **argv)
{
struct evhttp *httpd;
event_init();
httpd = evhttp_start("0.0.0.0", 6006);
if ( httpd == NULL )
{
fprintf(stderr, "Start server error: %m\n");
exit(1);
}
/* Set a callback for requests to "/specific". */
/* evhttp_set_cb(httpd, "/specific", another_handler, NULL); */
/* Set a callback for all other requests. */
evhttp_set_gencb(httpd, now_handler, NULL);
event_dispatch();
/* Not reached in this code as it is now. */
evhttp_free(httpd);
return 0;
}