HTTP服務器，在連接被接受後，我得到-1從recv返回（）

Question

我必須爲C++中的類實現HTTP服務器，但在接受連接後，recv()只返回-1。我怎樣才能解決這個問題？我在下面發佈了我的代碼。

int main(int argc, char* argv[]) 
{ 
    // Interpret the command line arguments 
    unsigned short port = 8080; 
    char* base_directory = NULL; 
    base_directory = getcwd(base_directory, 100); 

    if ((argc != 1) && (argc != 3) && (argc != 5)) { 
    cerr << "Usage: " << argv[0]; 
    cerr << " -p <port number> -d <base directory>" << endl; 
    return 1; 
    } 
    else { 
    for (int i = 1; i < argc; ++i) { 
     if (strcmp(argv[i], "-p") == 0) 
     port = (unsigned short) atoi(argv[++i]); 
     else if (strcmp(argv[i], "-d") == 0) 
     base_directory = argv[++i]; 
    } 
    } 

    // Create TCP socket 
    int tcp_sock = socket(AF_INET, SOCK_STREAM, 0); 
    if (tcp_sock < 0) { 
    cerr << "Unable to create TCP socket." << endl; 
    return 2; 
    } 

    // Create server socket 
    sockaddr_in server; 
    server.sin_family = AF_INET; 
    server.sin_port = htons(port); 
    server.sin_addr.s_addr = INADDR_ANY; 

    // Bind the socket 
    if (bind(tcp_sock, (sockaddr*)&server, sizeof(server)) < 0) { 
    cerr << "Unable to bind TCP socket." << endl; 
    return 3; 
    } 

    // Listen for a connection request on TCP port 
    listen(tcp_sock, 5); 

    // Create HTTP_Request object and start a while loop of accepting connections 
    char recv_buffer[3000]; 
    int bytes_recv = 0; 
    int recv_len = 0; 
    while (true) { 
    int acc_tcp_sock = accept(tcp_sock, NULL, NULL); 
    if (acc_tcp_sock == -1) { 
     cerr << "Unable to open TCP connection with client." << endl; 
     return 4; 
    } 
    do { 
     recv_len = recv(tcp_sock, recv_buffer + bytes_recv, 
     3000 - bytes_recv, 0); 
     bytes_recv += recv_len; 
     cout << bytes_recv << endl; 
     break; 
    } while (recv_len); 
    bytes_recv = 0; 
    HTTP_Request* request = HTTP_Request::Parse(recv_buffer, 3000); 
    cout << recv_buffer << endl; 
    } 

    return 0; 
} 

Answer 1

您在錯誤的套接字上收回。 您正在使用tcp_sock（它是您的偵聽套接字），而不是accept調用返回的套接字。 更改爲acc_tcp_sock，你應該很好去：

recv_len = recv(acc_tcp_sock, recv_buffer + bytes_recv, 
    3000 - bytes_recv, 0);