ClickHouse/dbms/programs/client/ConnectionParameters.h

#pragma once

#include <iostream>

#include <Core/Types.h>
#include <Core/Protocol.h>
#include <Core/Defines.h>
#include <Common/Exception.h>
#include <IO/ConnectionTimeouts.h>

#include <common/setTerminalEcho.h>
#include <ext/scope_guard.h>

#include <Poco/Util/AbstractConfiguration.h>


namespace DB
{

namespace ErrorCodes
{
    extern const int BAD_ARGUMENTS;
}

struct ConnectionParameters
{
    String host;
    UInt16 port{};
    String default_database;
    String user;
    String password;
    Protocol::Secure security = Protocol::Secure::Disable;
    Protocol::Compression compression = Protocol::Compression::Enable;
    ConnectionTimeouts timeouts;

    ConnectionParameters() {}

    ConnectionParameters(const Poco::Util::AbstractConfiguration & config)
    {
        bool is_secure = config.getBool("secure", false);
        security = is_secure
            ? Protocol::Secure::Enable
            : Protocol::Secure::Disable;

        host = config.getString("host", "localhost");
        port = config.getInt("port",
            config.getInt(is_secure ? "tcp_port_secure" : "tcp_port",
                is_secure ? DBMS_DEFAULT_SECURE_PORT : DBMS_DEFAULT_PORT));

        default_database = config.getString("database", "");
        /// changed the default value to "default" to fix the issue when the user in the prompt is blank
        user = config.getString("user", "default");
        bool password_prompt = false;
        if (config.getBool("ask-password", false))
        {
            if (config.has("password"))
                throw Exception("Specified both --password and --ask-password. Remove one of them", ErrorCodes::BAD_ARGUMENTS);
            password_prompt = true;
        }
        else
        {
            password = config.getString("password", "");
            /// if the value of --password is omitted, the password will be set implicitly to "\n"
            if (password == "\n")
                password_prompt = true;
        }
        if (password_prompt)
        {
            std::cout << "Password for user (" << user << "): ";
            setTerminalEcho(false);

            SCOPE_EXIT({
                setTerminalEcho(true);
            });
            std::getline(std::cin, password);
            std::cout << std::endl;
        }
        compression = config.getBool("compression", true)
            ? Protocol::Compression::Enable
            : Protocol::Compression::Disable;

        timeouts = ConnectionTimeouts(
            Poco::Timespan(config.getInt("connect_timeout", DBMS_DEFAULT_CONNECT_TIMEOUT_SEC), 0),
            Poco::Timespan(config.getInt("send_timeout", DBMS_DEFAULT_SEND_TIMEOUT_SEC), 0),
            Poco::Timespan(config.getInt("receive_timeout", DBMS_DEFAULT_RECEIVE_TIMEOUT_SEC), 0),
            Poco::Timespan(config.getInt("tcp_keep_alive_timeout", 0), 0));
    }
};

}