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@ -17,113 +17,117 @@
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Wu Jiaxu (wujiaxu@sogou-inc.com)
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*/
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#ifndef _WFSERVER_H_
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#ifndef _WFSERVER_H_ // 防止头文件被多次包含
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#define _WFSERVER_H_
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <errno.h>
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#include <functional>
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#include <atomic>
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#include <mutex>
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#include <condition_variable>
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#include <openssl/ssl.h>
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#include "EndpointParams.h"
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#include "WFTaskFactory.h"
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#include <sys/types.h> // 引入基本数据类型定义
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#include <sys/socket.h> // 引入 socket 相关的函数
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#include <errno.h> // 引入错误码定义
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#include <functional> // 引入函数对象
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#include <atomic> // 引入原子操作的支持
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#include <mutex> // 引入互斥量支持
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#include <condition_variable> // 引入条件变量支持
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#include <openssl/ssl.h> // 引入 OpenSSL 以支持 SSL/TLS
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#include "EndpointParams.h" // 引入端点参数定义
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#include "WFTaskFactory.h" // 引入任务工厂以创建任务
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// 定义服务器参数结构体
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struct WFServerParams
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{
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enum TransportType transport_type;
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size_t max_connections;
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int peer_response_timeout; /* timeout of each read or write operation */
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int receive_timeout; /* timeout of receiving the whole message */
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int keep_alive_timeout;
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size_t request_size_limit;
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int ssl_accept_timeout; /* if not ssl, this will be ignored */
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enum TransportType transport_type; // 传输类型（TCP, UDP, SSL等）
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size_t max_connections; // 最大并发连接数
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int peer_response_timeout; // 每次读取或写入操作的超时
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int receive_timeout; // 接收整个消息的超时
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int keep_alive_timeout; // 连接保持存活的超时
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size_t request_size_limit; // 请求大小限制
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int ssl_accept_timeout; // SSL 接受超时时间
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};
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// 设置服务器参数的默认值
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static constexpr struct WFServerParams SERVER_PARAMS_DEFAULT =
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{
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.transport_type = TT_TCP,
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.max_connections = 2000,
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.peer_response_timeout = 10 * 1000,
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.receive_timeout = -1,
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.keep_alive_timeout = 60 * 1000,
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.request_size_limit = (size_t)-1,
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.ssl_accept_timeout = 10 * 1000,
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.transport_type = TT_TCP, // 默认使用 TCP
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.max_connections = 2000, // 默认最多 2000 个连接
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.peer_response_timeout = 10 * 1000, // 默认对端响应超时 10 秒
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.receive_timeout = -1, // 默认不超时
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.keep_alive_timeout = 60 * 1000, // 默认连接保持存活 60 秒
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.request_size_limit = (size_t)-1, // 请求大小限制为无限制
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.ssl_accept_timeout = 10 * 1000, // SSL 接受超时设置为 10 秒
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};
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// 定义 WFServerBase 基类，用于建立服务器
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class WFServerBase : protected CommService
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{
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public:
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// 构造函数，接收服务器参数并初始化
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WFServerBase(const struct WFServerParams *params) :
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conn_count(0)
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conn_count(0) // 初始化连接计数为 0
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{
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this->params = *params;
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this->unbind_finish = false;
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this->listen_fd = -1;
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this->params = *params; // 保存服务器参数
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this->unbind_finish = false; // 初始化解除绑定状态
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this->listen_fd = -1; // 初始化监听文件描述符为无效值
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}
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public:
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/* To start a TCP server */
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// 启动一个 TCP 服务器函数
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/* Start on port with IPv4. */
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/* 在指定端口上启动服务器，IPv4 */
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int start(unsigned short port)
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{
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return start(AF_INET, NULL, port, NULL, NULL);
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}
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/* Start with family. AF_INET or AF_INET6. */
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/* 根据家庭类型启动服务器，IPv4 或 IPv6 */
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int start(int family, unsigned short port)
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{
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return start(family, NULL, port, NULL, NULL);
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}
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/* Start with hostname and port. */
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/* 使用主机名和端口启动服务器 */
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int start(const char *host, unsigned short port)
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{
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return start(AF_INET, host, port, NULL, NULL);
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}
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/* Start with family, hostname and port. */
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/* 使用家庭类型、主机名和端口启动服务器 */
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int start(int family, const char *host, unsigned short port)
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{
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return start(family, host, port, NULL, NULL);
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}
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/* Start with binding address. */
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/* 使用指定的地址绑定启动服务器 */
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int start(const struct sockaddr *bind_addr, socklen_t addrlen)
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{
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return start(bind_addr, addrlen, NULL, NULL);
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}
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/* To start an SSL server. */
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// 启动一个 SSL 服务器
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/* 在指定端口启动 SSL 服务器 */
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int start(unsigned short port, const char *cert_file, const char *key_file)
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{
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return start(AF_INET, NULL, port, cert_file, key_file);
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}
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/* 使用家庭类型和端口启动 SSL 服务器 */
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int start(int family, unsigned short port,
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const char *cert_file, const char *key_file)
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{
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return start(family, NULL, port, cert_file, key_file);
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}
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/* 使用主机名和端口启动 SSL 服务器 */
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int start(const char *host, unsigned short port,
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const char *cert_file, const char *key_file)
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{
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return start(AF_INET, host, port, cert_file, key_file);
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}
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/* 使用家庭类型、主机名和端口启动 SSL 服务器 */
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int start(int family, const char *host, unsigned short port,
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const char *cert_file, const char *key_file);
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/* This is the only necessary start function. */
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int start(const struct sockaddr *bind_addr, socklen_t addrlen,
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const char *cert_file, const char *key_file);
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/* To start with a specified fd. For graceful restart or SCTP server. */
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/* 使用指定文件描述符启动服务器，用于优雅重启或 SCTP 服务器 */
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int serve(int listen_fd)
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{
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return serve(listen_fd, NULL, NULL);
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@ -131,114 +135,119 @@ public:
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int serve(int listen_fd, const char *cert_file, const char *key_file);
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/* stop() is a blocking operation. */
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/* 停止服务器是一个阻塞操作 */
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void stop()
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{
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this->shutdown();
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this->wait_finish();
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this->shutdown(); // 关闭服务器
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this->wait_finish(); // 等待完成
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}
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/* Nonblocking terminating the server. For stopping multiple servers.
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* Typically, call shutdown() and then wait_finish().
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* But indeed wait_finish() can be called before shutdown(), even before
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* start() in another thread. */
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void shutdown();
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void wait_finish();
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/* 非阻塞地终止服务器。用于停止多个服务器。
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* 通常，调用 shutdown() 然后 wait_finish()。
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* 但实际上，可以在其他线程中在 shutdown() 之前甚至在 start() 之前调用 wait_finish()。 */
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void shutdown(); // 停止服务器
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void wait_finish(); // 等待所有连接和任务完成
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public:
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// 获取当前连接数
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size_t get_conn_count() const { return this->conn_count; }
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/* Get the listening address. This is often used after starting
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* server on a random port (start() with port == 0). */
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/* 获取监听地址。这通常在服务器在随机端口上启动后使用（start() 端口为 0）。 */
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int get_listen_addr(struct sockaddr *addr, socklen_t *addrlen) const
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{
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if (this->listen_fd >= 0)
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return getsockname(this->listen_fd, addr, addrlen);
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return getsockname(this->listen_fd, addr, addrlen); // 获取当前的 socket 地址
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errno = ENOTCONN;
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return -1;
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errno = ENOTCONN; // 如果没有连接，设置错误号为没有连接
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return -1; // 返回错误
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}
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// 获取服务器参数
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const struct WFServerParams *get_params() const { return &this->params; }
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protected:
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/* Override this function to create the initial SSL CTX of the server */
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/* 重写此函数以创建服务器的初始 SSL CTX */
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virtual SSL_CTX *new_ssl_ctx(const char *cert_file, const char *key_file);
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/* Override this function to implement server that supports TLS SNI.
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* "servername" will be NULL if client does not set a host name.
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* Returning NULL to indicate that servername is not supported. */
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/* 重写此函数以实现支持 TLS SNI 的服务器。
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* "servername" 如果客户端未设置主机名将为 NULL。
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* 返回 NULL 表示服务器名称不受支持。 */
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virtual SSL_CTX *get_server_ssl_ctx(const char *servername)
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{
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return this->get_ssl_ctx();
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return this->get_ssl_ctx(); // 返回当前的 SSL 上下文
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}
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/* This can be used by the implementation of 'new_ssl_ctx'. */
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/* 这个函数可以在 'new_ssl_ctx' 的实现中使用。 */
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static int ssl_ctx_callback(SSL *ssl, int *al, void *arg);
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protected:
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WFServerParams params;
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WFServerParams params; // 服务器参数结构体
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protected:
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// 创建新连接的方法
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virtual int create_listen_fd();
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virtual WFConnection *new_connection(int accept_fd);
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void delete_connection(WFConnection *conn);
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virtual WFConnection *new_connection(int accept_fd); // 创建新连接
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void delete_connection(WFConnection *conn); // 删除连接
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private:
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// 初始化服务器的方法
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int init(const struct sockaddr *bind_addr, socklen_t addrlen,
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const char *cert_file, const char *key_file);
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virtual void handle_unbound();
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virtual void handle_unbound(); // 处理解除绑定
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protected:
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std::atomic<size_t> conn_count;
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std::atomic<size_t> conn_count; // 当前连接计数
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private:
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int listen_fd;
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bool unbind_finish;
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int listen_fd; // 监听文件描述符
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bool unbind_finish; // 标记解除绑定是否完成
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std::mutex mutex;
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std::condition_variable cond;
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std::mutex mutex; // 互斥锁，用于线程安全
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std::condition_variable cond; // 条件变量，用于线程间通知
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class CommScheduler *scheduler;
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class CommScheduler *scheduler; // 调度器
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};
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// 模板类，用于定义特定协议的服务器
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template<class REQ, class RESP>
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class WFServer : public WFServerBase
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{
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public:
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// 构造函数，接收参数和处理函数
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WFServer(const struct WFServerParams *params,
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std::function<void (WFNetworkTask<REQ, RESP> *)> proc) :
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WFServerBase(params),
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process(std::move(proc))
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WFServerBase(params), // 调用基类构造函数
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process(std::move(proc)) // 移动处理函数，避免不必要的拷贝
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{
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}
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// 构造函数，使用默认参数
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WFServer(std::function<void (WFNetworkTask<REQ, RESP> *)> proc) :
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WFServerBase(&SERVER_PARAMS_DEFAULT),
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process(std::move(proc))
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WFServerBase(&SERVER_PARAMS_DEFAULT), // 调用基类构造函数，传入默认参数
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process(std::move(proc)) // 移动处理函数
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{
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}
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protected:
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virtual CommSession *new_session(long long seq, CommConnection *conn);
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virtual CommSession *new_session(long long seq, CommConnection *conn); // 创建新会话
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protected:
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std::function<void (WFNetworkTask<REQ, RESP> *)> process;
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std::function<void (WFNetworkTask<REQ, RESP> *)> process; // 处理函数
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};
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// 创建新会话的方法，实现具体的会话处理
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template<class REQ, class RESP>
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CommSession *WFServer<REQ, RESP>::new_session(long long seq, CommConnection *conn)
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{
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using factory = WFNetworkTaskFactory<REQ, RESP>;
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WFNetworkTask<REQ, RESP> *task;
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using factory = WFNetworkTaskFactory<REQ, RESP>; // 使用工厂来创建任务
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WFNetworkTask<REQ, RESP> *task; // 声明任务指针
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task = factory::create_server_task(this, this->process);
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task->set_keep_alive(this->params.keep_alive_timeout);
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task->set_receive_timeout(this->params.receive_timeout);
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task->get_req()->set_size_limit(this->params.request_size_limit);
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task = factory::create_server_task(this, this->process); // 使用工厂创建任务
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task->set_keep_alive(this->params.keep_alive_timeout); // 设置保持连接的超时
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task->set_receive_timeout(this->params.receive_timeout); // 设置接收超时
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task->get_req()->set_size_limit(this->params.request_size_limit); // 设置请求大小限制
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return task;
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return task; // 返回创建的会话任务
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}
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#endif
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#endif // _WFSERVER_H_
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yangkesi
1 month ago