libevent常见开发流程

一些常见步骤，列出来啦，免得自己敲,我是菜鸟，菜鸟的常见步骤就是这样吧，

服务器端

/* For sockaddr_in */#include <netinet/in.h>/* For socket functions */#include <sys/socket.h>/* For gethostbyname */#include <netdb.h>#include <unistd.h>#include <string.h>#include <stdio.h>#include <event2/event.h>#include <event2/listener.h>#include <event2/bufferevent.h>#include <strings.h>#include <glog/logging.h>#include <arpa/inet.h>void socket_read_cb(struct bufferevent *bev, void *ctx);void socket_event_cb(struct bufferevent *bev,short events, void *ctx);void do_accept(struct evconnlistener *listener, evutil_socket_t sock, struct sockaddr *addr, int len, void *ptr);int main(int c, char **v){    struct event_base *base = event_base_new();    struct sockaddr_in address;    ::bzero(&address, sizeof(address));    address.sin_family = AF_INET;    //address.sin_addr.s_addr = INADDR_ANY;    const char *ip = "xxx.xxx.xxx.xxx";    inet_aton(ip, &(address.sin_addr));    address.sin_port = htons(12345);    int len = sizeof(address);    //listen    struct evconnlistener *listener = evconnlistener_new_bind(base, do_accept, base, LEV_OPT_CLOSE_ON_FREE | LEV_OPT_REUSEABLE, -1, (struct sockaddr*)&address, len);    //LOG(INFO) << "Listening...";      event_base_dispatch(base);      evconnlistener_free(listener);    event_base_free(base);    return 0;}void do_accept(struct evconnlistener *listener, evutil_socket_t sockfd, struct sockaddr *addr, int len, void *ptr){    struct event_base *base = (struct event_base*)ptr;    //创建一个buffer，与sockfd关联起来    struct bufferevent *bufev = bufferevent_socket_new(base, sockfd, BEV_OPT_CLOSE_ON_FREE);    //LOG(INFO) << "CREATE BUFFER-EVENT";    //设置buferevent的回调函数    bufferevent_setcb(bufev, socket_read_cb, NULL, socket_event_cb, NULL);    bufferevent_enable(bufev, EV_READ | EV_PERSIST);        //LOG(INFO) << "ADD BUFFER-EVENT";}void socket_read_cb(struct bufferevent *bev, void *ctx){    char msg[MAX];    int len = bufferevent_read(bev, msg, sizeof(msg));    //处理...    //写socket    bufferevent_write(bev, msg, len);}void socket_event_cb(struct bufferevent *bev,short events, void *ctx){    if (events & BEV_EVENT_EOF)    {        fprintf(stderr, "closed by peer.\n");    }    else if (events & BEV_EVENT_ERROR)    {        fprintf(stderr, "some other error\n");    }    bufferevent_free(bev);}

客户端

/* For sockaddr_in */#include <netinet/in.h>/* For socket functions */#include <sys/socket.h>/* For gethostbyname */#include <netdb.h>#include <unistd.h>#include <string.h>#include <stdio.h>#include <event2/event.h>#include <event2/listener.h>#include <event2/bufferevent.h>#include <strings.h>#include <glog/logging.h>#include <arpa/inet.h>void socket_read_cb(struct bufferevent *bev, void *ctx);void socket_event_cb(struct bufferevent *bev,short events, void *ctx);int main(int c, char **v){    struct event_base *base = event_base_new();    struct sockaddr_in address;    ::bzero(&address, sizeof(address));    address.sin_family = AF_INET;    const char *ip = "10.166.15.215";    inet_aton(ip, &(address.sin_addr));    address.sin_port = htons(12345);    int len = sizeof(address);    struct bufferevent *bev;    //创建bufferevent和socket    bev = bufferevent_socket_new(base, -1, BEV_OPT_CLOSE_ON_FREE);    //connect    bufferevent_socket_connect(bev, (struct sockaddr*)&address, len);    //设置回调函数    bufferevent_setcb(bev,socket_read_cb, NULL, NULL, base);    bufferevent_enable(bev, EV_READ | EV_WRITE | EV_PERSIST);    //write ...     bufferevent_write(bev, buf, strlen(buf));       event_base_dispatch(base);      event_base_free(base);    return 0;}void socket_read_cb(struct bufferevent *bev, void *ctx){    char buf[MAX];    bufferevent_read(bev, buf, sizeof(buf));    //buffer_write..}void socket_event_cb(struct bufferevent *bev,short events, void *ctx){    ...}

先这样，再改进