mirror of
https://github.com/boostorg/mysql.git
synced 2025-05-12 14:11:41 +00:00
88fbe387ac
Separate compilation Immediate completions are now posted through the I/O executor Jamfiles now correctly requires C++11 Refactored the protocol and channel modules Removed example on default completion tokens close #23 close #112
109 lines
3.3 KiB
C++
109 lines
3.3 KiB
C++
//
|
|
// Copyright (c) 2019-2023 Ruben Perez Hidalgo (rubenperez038 at gmail dot com)
|
|
//
|
|
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
//
|
|
|
|
//[tutorial_listing
|
|
|
|
#include <boost/mysql/error_with_diagnostics.hpp>
|
|
#include <boost/mysql/handshake_params.hpp>
|
|
#include <boost/mysql/results.hpp>
|
|
#include <boost/mysql/tcp_ssl.hpp>
|
|
|
|
#include <boost/asio/io_context.hpp>
|
|
#include <boost/asio/ip/tcp.hpp>
|
|
#include <boost/asio/ssl/context.hpp>
|
|
#include <boost/system/system_error.hpp>
|
|
|
|
#include <iostream>
|
|
#include <string>
|
|
|
|
/**
|
|
* For this example, we will be using the 'boost_mysql_examples' database.
|
|
* You can get this database by running db_setup.sql.
|
|
* This example assumes you are connecting to a localhost MySQL server.
|
|
*
|
|
* This example uses synchronous functions and handles errors using exceptions.
|
|
*/
|
|
|
|
void main_impl(int argc, char** argv)
|
|
{
|
|
if (argc != 4)
|
|
{
|
|
std::cerr << "Usage: " << argv[0] << " <username> <password> <server-hostname>\n";
|
|
exit(1);
|
|
}
|
|
|
|
//[tutorial_connection
|
|
// The execution context, required to run I/O operations.
|
|
boost::asio::io_context ctx;
|
|
|
|
// The SSL context, required to establish TLS connections.
|
|
// The default SSL options are good enough for us at this point.
|
|
boost::asio::ssl::context ssl_ctx(boost::asio::ssl::context::tls_client);
|
|
|
|
// Represents a connection to the MySQL server.
|
|
boost::mysql::tcp_ssl_connection conn(ctx.get_executor(), ssl_ctx);
|
|
//]
|
|
|
|
//[tutorial_connect
|
|
// Resolve the hostname to get a collection of endpoints
|
|
boost::asio::ip::tcp::resolver resolver(ctx.get_executor());
|
|
auto endpoints = resolver.resolve(argv[3], boost::mysql::default_port_string);
|
|
|
|
// The username, password and database to use
|
|
boost::mysql::handshake_params params(
|
|
argv[1], // username
|
|
argv[2], // password
|
|
"boost_mysql_examples" // database
|
|
);
|
|
|
|
// Connect to the server using the first endpoint returned by the resolver
|
|
conn.connect(*endpoints.begin(), params);
|
|
//]
|
|
|
|
//[tutorial_query
|
|
// Issue the SQL query to the server
|
|
const char* sql = "SELECT 'Hello world!'";
|
|
boost::mysql::results result;
|
|
conn.execute(sql, result);
|
|
//]
|
|
|
|
//[tutorial_results
|
|
// Print the first field in the first row
|
|
std::cout << result.rows().at(0).at(0) << std::endl;
|
|
//]
|
|
|
|
//[tutorial_close
|
|
// Close the connection
|
|
conn.close();
|
|
//]
|
|
}
|
|
|
|
int main(int argc, char** argv)
|
|
{
|
|
try
|
|
{
|
|
main_impl(argc, argv);
|
|
}
|
|
catch (const boost::mysql::error_with_diagnostics& err)
|
|
{
|
|
// Some errors include additional diagnostics, like server-provided error messages.
|
|
// Security note: diagnostics::server_message may contain user-supplied values (e.g. the
|
|
// field value that caused the error) and is encoded using to the connection's encoding
|
|
// (UTF-8 by default). Treat is as untrusted input.
|
|
std::cerr << "Error: " << err.what() << '\n'
|
|
<< "Server diagnostics: " << err.get_diagnostics().server_message() << std::endl;
|
|
return 1;
|
|
}
|
|
catch (const std::exception& err)
|
|
{
|
|
std::cerr << "Error: " << err.what() << std::endl;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
//]
|