controller三个接口实现，中台对于数据库的简单管理 #8
Merged
pzthu8lr3
merged 1 commits from yuankaifeng_branch into master 6 months ago
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#include <iostream>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <unistd.h>
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#include <cstring>
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#define PORT 8888
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int main() {
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int sock = 0;
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struct sockaddr_in server_addr;
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const char *message = "Hello Server";
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char buffer[1024] = {0};
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int valread;
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// Creating socket
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if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
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std::cerr << "Socket creation failed" << std::endl;
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return -1;
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}
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = htons(PORT);
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// Get server address
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if (inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr) <= 0) {
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std::cerr << "Invalid address or Address not supported" << std::endl;
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return -1;
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}
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// Connect the client socket to the server
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if (connect(sock, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
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std::cerr << "Connection with the server failed" << std::endl;
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return -1;
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}
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// Send some data
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if (send(sock, message, strlen(message), 0) < 0) {
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std::cerr << "Send failed" << std::endl;
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return -1;
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}
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printf("Message sent\n");
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// Receive a reply from the server
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valread = read(sock, buffer, 1024);
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printf("Message from server : %s\n", buffer);
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close(sock);
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return 0;
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}
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#include <iostream>
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#include <cstring>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <unistd.h>
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#define PORT 8888
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int main() {
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int server_fd, new_socket;
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struct sockaddr_in address;
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int opt = 1;
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int addrlen = sizeof(address);
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char buffer[1024] = {0};
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const char *response = "Hello Client, I have received your data";
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// Creating socket
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if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
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perror("Socket creation failed");
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exit(EXIT_FAILURE);
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}
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// Forcefully attaching socket to the port 8080
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if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt))) {
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perror("Setsockopt failed");
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exit(EXIT_FAILURE);
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}
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address.sin_family = AF_INET;
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address.sin_addr.s_addr = INADDR_ANY;
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address.sin_port = htons(PORT);
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// Forcefully attaching socket to the port 8080
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if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
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perror("Bind failed");
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exit(EXIT_FAILURE);
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}
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if (listen(server_fd, 3) < 0) {
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perror("Listen failed");
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exit(EXIT_FAILURE);
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}
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if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen)) < 0) {
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perror("Accept failed");
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exit(EXIT_FAILURE);
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}
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read(new_socket, buffer, 1024);
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std::cout << "Message from client: " << buffer << std::endl;
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// send the message back to the client
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send(new_socket, response, strlen(response), 0);
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printf("Hello message sent\n");
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close(new_socket);
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close(server_fd);
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return 0;
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}
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#include <iostream>
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#include <mysql/mysql.h>
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int main() {
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MYSQL *conn;
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conn = mysql_init(NULL);
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if (conn == NULL) {
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std::cerr << "MySQL init failed" << std::endl;
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return 1;
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}
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const char *server = "localhost";
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const char *user = "rtsw";
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const char *password = "123456";
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const char *database = "nginxdb";
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unsigned int port = 3306; // 使用云数据库提供的端口
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if (mysql_real_connect(conn, server, user, password, database, port, NULL, 0) == NULL) {
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std::cerr << "Connection error: " << mysql_error(conn) << std::endl;
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mysql_close(conn);
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return 1;
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}
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std::cout << "Successfully connected to the database" << std::endl;
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// ... 执行数据库操作 ...
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mysql_close(conn);
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return 0;
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}
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#include <iostream>
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#include <thread>
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#include <cstring>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <unistd.h>
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#include <arpa/inet.h>
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#define PORT 8080
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#define MAX_CLIENTS 5
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#define BUFFER_SIZE 1024
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// 声明 handle_client 函数
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void handle_client(int client_socket);
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int main() {
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int server_fd, new_socket;
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struct sockaddr_in server_addr, client_addr;
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socklen_t client_len = sizeof(client_addr);
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char buffer[BUFFER_SIZE];
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int opt = 1;
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// 创建套接字
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server_fd = socket(AF_INET, SOCK_STREAM, 0);
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if (server_fd < 0) {
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perror("socket creation failed");
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exit(EXIT_FAILURE);
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}
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// 设置选项，允许重用地址
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if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt))) {
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perror("setsockopt failed");
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exit(EXIT_FAILURE);
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}
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server_addr.sin_family = AF_INET;
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server_addr.sin_addr.s_addr = INADDR_ANY;
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server_addr.sin_port = htons(PORT);
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// 绑定
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if (bind(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
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perror("bind failed");
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exit(EXIT_FAILURE);
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}
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// 监听
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if (listen(server_fd, MAX_CLIENTS) < 0) {
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perror("listen failed");
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exit(EXIT_FAILURE);
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}
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std::cout << "Server listening on port " << PORT << std::endl;
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while (true) {
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client_len = sizeof(client_addr);
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new_socket = accept(server_fd, (struct sockaddr *)&client_addr, &client_len);
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if (new_socket < 0) {
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perror("accept failed");
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exit(EXIT_FAILURE);
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}
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std::cout << "New client connected from " << inet_ntoa(client_addr.sin_addr) << " port " << ntohs(client_addr.sin_port) << std::endl;
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// 创建并启动线程处理客户端
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std::thread(handle_client, new_socket).detach();
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}
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close(server_fd);
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return 0;
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}
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// 定义 handle_client 函数
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void handle_client(int client_socket) {
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while (true) {
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char buffer[BUFFER_SIZE];
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memset(buffer, 0, BUFFER_SIZE); // 清空缓冲区
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int nbytes = read(client_socket, buffer, BUFFER_SIZE);
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if (nbytes <= 0) {
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std::cout << "Client disconnected." << std::endl;
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close(client_socket);
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break;
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}
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std::cout << "Received message from client: " << buffer << std::endl;
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// 这里可以添加更多的处理逻辑
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}
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}
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#include <iostream>
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#include <mysql/mysql.h>
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int main() {
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MYSQL *conn;
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conn = mysql_init(NULL);
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if (conn == NULL) {
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std::cerr << "MySQL init failed" << std::endl;
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return 1;
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}
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const char *server = "localhost";
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const char *user = "rtsw";
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const char *password = "123456";
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const char *database = "nginxdb";
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unsigned int port = 3306;
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if (mysql_real_connect(conn, server, user, password, database, port, NULL, 0) == NULL) {
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std::cerr << "Connection error: " << mysql_error(conn) << std::endl;
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mysql_close(conn);
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return 1;
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}
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std::cout << "Successfully connected to the database" << std::endl;
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// 插入数据
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const char *insert_query = "INSERT INTO users (username, email) VALUES ('newuser', 'newuser@example.com')";
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if (mysql_query(conn, insert_query)) {
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std::cerr << "Insert error: " << mysql_error(conn) << std::endl;
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} else {
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std::cout << "Insert successful" << std::endl;
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}
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// 查询数据
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const char *select_query = "SELECT * FROM users";
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MYSQL_RES *result = mysql_store_result(conn);
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if (result) {
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MYSQL_ROW row;
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while ((row = mysql_fetch_row(result))) {
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std::cout << "id: " << row[0] << ", username: " << row[1] << ", email: " << row[2] << std::endl;
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}
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mysql_free_result(result);
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} else {
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std::cerr << "Select error: " << mysql_error(conn) << std::endl;
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}
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// 更新数据
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const char *update_query = "UPDATE users SET email = 'newuser_updated@example.com' WHERE username = 'newuser'";
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if (mysql_query(conn, update_query)) {
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std::cerr << "Update error: " << mysql_error(conn) << std::endl;
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} else {
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std::cout << "Update successful" << std::endl;
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}
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// 删除数据
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const char *delete_query = "DELETE FROM users WHERE username = 'newuser'";
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if (mysql_query(conn, delete_query)) {
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std::cerr << "Delete error: " << mysql_error(conn) << std::endl;
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} else {
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std::cout << "Delete successful" << std::endl;
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}
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mysql_close(conn);
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return 0;
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}
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#include <iostream>
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#include <thread>
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#include <vector>
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#include <map>
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#include <mutex>
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#include <atomic>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <unistd.h>
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#include <arpa/inet.h>
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#define BUFFER_SIZE 1024
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std::vector<std::thread> threads; // 存储所有连接线程
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std::map<int, int> sockets; // 存储套接字
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std::mutex sockets_mutex; // 用于同步访问 sockets
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std::atomic<bool> exit_flag(false); // 原子退出标志
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// 维护连接的函数
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void KeepConnection(int sock) {
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char buffer[BUFFER_SIZE];
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int nbytes;
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while (!exit_flag) {
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nbytes = recv(sock, buffer, BUFFER_SIZE, 0);
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if (nbytes <= 0) {
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std::cout << "Gateway disconnected" << std::endl;
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break;
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}
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std::cout << "Received from gateway (Socket " << sock << "): " << buffer << std::endl;
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}
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{
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std::lock_guard<std::mutex> lock(sockets_mutex);
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sockets.erase(sock); // 从集合中移除套接字
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}
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close(sock);
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}
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// 连接到网关的函数
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void ConnectToGateway(const std::string& ip, int port) {
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int sock = socket(AF_INET, SOCK_STREAM, 0);
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if (sock < 0) {
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perror("Could not create socket");
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return;
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}
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struct sockaddr_in server_addr;
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = htons(port);
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if (inet_pton(AF_INET, ip.c_str(), &server_addr.sin_addr) <= 0) {
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perror("Invalid address");
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close(sock);
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return;
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}
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if (connect(sock, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
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perror("Connection to the server failed");
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close(sock);
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return;
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}
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{
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std::lock_guard<std::mutex> lock(sockets_mutex);
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sockets[sock] = 1; // 将套接字添加到集合中
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}
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std::cout << "Connected to gateway at " << ip << ":" << port << " (Socket " << sock << ")" << std::endl;
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// 在新线程中维护连接
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threads.emplace_back(KeepConnection, sock);
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}
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int main() {
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std::string command, ip;
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int port;
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bool in_connect_mode = false;
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while (true) {
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std::cout << "Enter command (connect/exitconnect/exit): ";
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std::cin >> command;
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if (command == "connect") {
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if (in_connect_mode) {
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std::cout << "Already in connect mode." << std::endl;
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continue;
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}
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in_connect_mode = true; // 进入连接模式
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std::cout << "Enter the gateway IP address: ";
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std::cin >> ip;
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std::cout << "Enter the gateway port: ";
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std::cin >> port;
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ConnectToGateway(ip, port);
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} else if (command == "exitconnect") {
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if (!in_connect_mode) {
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std::cout << "Not in connect mode." << std::endl;
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continue;
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}
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in_connect_mode = false; // 退出连接模式
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std::cout << "Exiting connect mode." << std::endl;
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} else if (command == "exit") {
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exit_flag = true; // 设置退出标志
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std::cout << "Exiting program." << std::endl;
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// 关闭所有套接字
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for (auto& sock_pair : sockets) {
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shutdown(sock_pair.first, SHUT_RDWR); // 关闭套接字的发送和接收
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close(sock_pair.first);
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}
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sockets.clear();
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// 等待所有线程结束
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for (auto& thread : threads) {
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if (thread.joinable()) {
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thread.join();
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}
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}
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threads.clear();
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break; // 退出主循环
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} else {
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std::cout << "Unknown command" << std::endl;
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}
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}
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return 0;
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}
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