libevent http服务器实现
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <event.h>
#include <evhttp.h>
void httpserver_handler(struct evhttp_request *req, void *arg)
{
const char *cmdtype;
struct evbuffer *buf = evbuffer_new();
if (buf == NULL)
{
printf("evbuffer_new error !\n");
return;
}
switch (evhttp_request_get_command(req))
{
case EVHTTP_REQ_GET: cmdtype = "GET"; break;
case EVHTTP_REQ_POST: cmdtype = "POST"; break;
case EVHTTP_REQ_HEAD: cmdtype = "HEAD"; break;
case EVHTTP_REQ_PUT: cmdtype = "PUT"; break;
case EVHTTP_REQ_DELETE: cmdtype = "DELETE"; break;
case EVHTTP_REQ_OPTIONS:cmdtype = "OPTIONS";break;
case EVHTTP_REQ_TRACE: cmdtype = "TRACE"; break;
case EVHTTP_REQ_CONNECT:cmdtype = "CONNECT";break;
case EVHTTP_REQ_PATCH: cmdtype = "PATCH"; break;
default: cmdtype = "unknown"; break;
}
printf("%s url=%s \n", cmdtype, evhttp_request_get_uri(req));
evbuffer_add_printf(buf,"<html>\n"
"<head>\n"
" <title>Libevnet Test</title>\n"
"</head>\n"
"<body>\n"
" <h1>Hello world ,This is a Libenvet Test !</h1>\n"
"</body>\n"
"</html>\n");
evhttp_send_reply(req, 200, "OK", buf);
}
int httpserver_bindsocket(int port, int backlog)
{
int ret;
int fd;
fd = socket(AF_INET, SOCK_STREAM, 0);
if (fd < 0)
{
printf("socket error !\n");
return -1;
}
int opt = 1;
ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&opt, sizeof(int));
struct sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = INADDR_ANY;
addr.sin_port = htons(port);
ret = bind(fd, (struct sockaddr*)&addr, sizeof(addr));
if (ret < 0)
{
printf("bind error !\n");
return -1;
}
ret = listen(fd, backlog);
if (ret < 0)
{
printf("listen error !\n");
return -1;
}
int flags;
if ((flags = fcntl(fd, F_GETFL, 0)) < 0
|| fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0)
{
printf("fcntl error !\n");
return -1;
}
return fd;
}
int httpserver_start(int port, int backlog)
{
int ret;
int fd = httpserver_bindsocket(port, backlog);
if (fd < 0)
{
return -1;
printf("httpserver_bindsocket error !\n");
}
struct event_base *base = event_init();
if (base == NULL)
{
printf("event_init error !\n");
return -1;
}
struct evhttp *httpd = evhttp_new(base);
if (httpd == NULL)
{
printf("enhttp_new error !\n");
return -1;
}
ret = evhttp_accept_socket(httpd, fd);
if (ret != 0)
{
printf("evhttp_accept_socket error \n");
return -1;
}
evhttp_set_gencb(httpd, httpserver_handler, NULL);
event_base_dispatch(base);
return 0;
}
int main(void)
{
httpserver_start(8000, 128);
return 0;
}
编译运行，在浏览器中输入：
http://192.168.2.86:8000
回车，出现
测试成功！