c++ 实现wss 服务端

好的，以下是一个简单的 C++ 实现 wss 服务端的代码示例，使用了 OpenSSL 库：

#include <iostream>
#include <string>
#include <openssl/ssl.h>
#include <openssl/err.h>

#define CERT_FILE_PATH "/path/to/cert"
#define KEY_FILE_PATH "/path/to/key"
#define PORT 8080

SSL_CTX* InitSSL()
{
    SSL_load_error_strings();
    OpenSSL_add_ssl_algorithms();
    const SSL_METHOD* method = TLSv1_2_server_method();
    SSL_CTX* ctx = SSL_CTX_new(method);

    if (!ctx)
    {
        std::cerr << "SSL_CTX_new error" << std::endl;
        return nullptr;
    }

    if (SSL_CTX_use_certificate_file(ctx, CERT_FILE_PATH, SSL_FILETYPE_PEM) <= 0)
    {
        std::cerr << "SSL_CTX_use_certificate_file error" << std::endl;
        SSL_CTX_free(ctx);
        return nullptr;
    }

    if (SSL_CTX_use_PrivateKey_file(ctx, KEY_FILE_PATH, SSL_FILETYPE_PEM) <= 0)
    {
        std::cerr << "SSL_CTX_use_PrivateKey_file error" << std::endl;
        SSL_CTX_free(ctx);
        return nullptr;
    }

    if (!SSL_CTX_check_private_key(ctx))
    {
        std::cerr << "SSL_CTX_check_private_key error" << std::endl;
        SSL_CTX_free(ctx);
        return nullptr;
    }

    return ctx;
}

int main()
{
    SSL_CTX* ctx = InitSSL();
    if (!ctx)
    {
        return 1;
    }

    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0)
    {
        std::cerr << "socket error" << std::endl;
        return 1;
    }

    sockaddr_in addr = { 0 };
    addr.sin_family = AF_INET;
    addr.sin_port = htons(PORT);
    addr.sin_addr.s_addr = htonl(INADDR_ANY);

    if (bind(sockfd, (sockaddr*)&addr, sizeof(addr)) < 0)
    {
        std::cerr << "bind error" << std::endl;
        return 1;
    }

    if (listen(sockfd, 10) < 0)
    {
        std::cerr << "listen error" << std::endl;
        return 1;
    }

    while (true)
    {
        sockaddr_in cliAddr = { 0 };
        socklen_t addrLen = sizeof(cliAddr);
        int clientfd = accept(sockfd, (sockaddr*)&cliAddr, &addrLen);
        if (clientfd < 0)
        {
            std::cerr << "accept error" << std::endl;
            continue;
        }

        SSL* ssl = SSL_new(ctx);
        SSL_set_fd(ssl, clientfd);
        if (SSL_accept(ssl) <= 0)
        {
            std::cerr << "SSL_accept error" << std::endl;
            SSL_free(ssl);
            close(clientfd);
            continue;
        }

        char buf[1024] = { 0 };
        int n = SSL_read(ssl, buf, sizeof(buf) - 1);
        if (n <= 0)
        {
            std::cerr << "SSL_read error" << std::endl;
            SSL_free(ssl);
            close(clientfd);
            continue;
        }

        std::string request(buf, n);
        std::cout << "Received request: " << request << std::endl;

        std::string response = "HTTP/1.1 200 OK\r\nContent-Length: 6\r\n\r\nHello!";
        n = SSL_write(ssl, response.c_str(), response.length());
        if (n <= 0)
        {
            std::cerr << "SSL_write error" << std::endl;
            SSL_free(ssl);
            close(clientfd);
            continue;
        }

        SSL_free(ssl);
        close(clientfd);
    }

    SSL_CTX_free(ctx);
    return 0;
}

这段代码使用了 OpenSSL 库创建了一个 SSL 上下文，加载了 SSL 证书和私钥，并启动了一个 SSL 套接字监听客户端连接。在实际使用中，需要将 `/path/to/cert` 和 `/path/to/key` 替换为实际的 SSL 证书和私钥的路径。