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SIMPLIFY C++ DEVELOPMENT


THE POCO C++ LIBRARIES ARE POWERFUL CROSS-PLATFORM C++ LIBRARIES FOR BUILDING
NETWORK- AND INTERNET-BASED APPLICATIONS THAT RUN ON DESKTOP, SERVER, MOBILE,
IOT, AND EMBEDDED SYSTEMS.

Latest Release: 1.12.2 [Changelog]

The POCO C++ Libraries are being used by C++ developers worldwide to build
challenging and mission-critical applications.

Whether building automation systems, industrial automation, IoT platforms, air
traffic management systems, enterprise IT application and infrastructure
management, security and network analytics, automotive infotainment and
telematics, financial or healthcare, C++ developers have been trusting the POCO
C++ Libraries for 15+ years and deployed it in millions of devices.




POCO IS USED FOR


EMBEDDED DEVICES

Create software for connected embedded devices running Linux, Windows Embedded
or QNX.


MOBILE APPS

Create cross-platform backends in C++ for iOS and Android applications and
combine it with a native or HTML5-based user interface.


INTERNET OF THINGS

Create software for IoT devices that talk to cloud backends over HTTP REST APIs.
See macchina.io for an IoT platform built with POCO.


SERVER APPLICATIONS

Build application servers in C++ that talk to SQL databases, MongoDB or Redis.


CLOUD & MICROSERVICES

Build high-performance microservices with REST APIs for data analytics or
machine learning in C++.


DESKTOP APPS

Build desktop applications that talk to REST APIs or SQL databases.


MAIN FEATURES


CROSS-PLATFORM

Powerful platform abstractions let you build cross platform code that runs on
all common desktop, server, mobile and embedded platforms.


PERFORMANCE

Written in efficient modern C++, POCO does not waste precious CPU cycles and
memory.


EASY TO USE

Comprehensive and consistent APIs combined with an easily accessible code base
make C++ developers more productive.


MODULAR & SCALABLE

Don't pay for what you don't use. Use on embedded Linux devices with as little
as of 8-16 MB of RAM, or on multi-core, multi-gigabyte servers.


MULTITHREADING

Advanced multithreading abstractions simplify the development of multithreaded
programs.


LOGGING

Versatile, low overhead and extensible logging framework for all your logging
needs.


JSON & XML

Multiple APIs (streaming and document-oriented) for parsing and creating JSON
and XML.


DATABASE ACCESS

Access SQL databases like SQLite, MySQL/MariaDB, PostgreSQL and SQL Server (via
ODBC). Or NoSQL databases like MongoDB and Redis.


NETWORK & INTERNET

From basic sockets to HTTP/HTTPS client and server, POCO covers all your network
programming needs.


ENCRYPTION & SECURITY

Easy-to-use wrappers for OpenSSL make it easy to integrate encryption and
SSL/TLS into your application.

 * See all features


FROM OUR BLOG


RELEASE 1.12.2 AVAILABLE

This is another maintenance release that fixes a few issues introduced in 1.12.0
and 1.12.1. The complete list of closed GitHub issues is in the CHANGELOG.

 * Read More


RELEASE 1.12.1 AVAILABLE

This is a maintenance release that fixes a few issues introduced in 1.12.0. The
complete list of closed GitHub issues is in the CHANGELOG.

 * Read More


EXAMPLE CODE

SIMPLE WEB SERVER

The following code example implements a simple multithreaded web server serving
a single HTML page. It uses the Foundation, Net and Util libraries and shows the
following features:

 * Cross-Platform - the code will work on all supported platforms, including
   Linux, macOS and Windows.
 * Logging
 * HTTP framework in Net library.
 * Server application support in Util library including configuration file
   handling.

#include "Poco/Net/HTTPServer.h"
#include "Poco/Net/HTTPRequestHandler.h"
#include "Poco/Net/HTTPRequestHandlerFactory.h"
#include "Poco/Net/HTTPServerRequest.h"
#include "Poco/Net/HTTPServerResponse.h"
#include "Poco/Net/ServerSocket.h"
#include "Poco/Util/ServerApplication.h"
#include <iostream>

using namespace Poco;
using namespace Poco::Net;
using namespace Poco::Util;

class HelloRequestHandler: public HTTPRequestHandler
{
    void handleRequest(HTTPServerRequest& request, HTTPServerResponse& response)
    {
        Application& app = Application::instance();
        app.logger().information("Request from %s", request.clientAddress().toString());

        response.setChunkedTransferEncoding(true);
        response.setContentType("text/html");

        response.send()
            << "<html>"
            << "<head><title>Hello</title></head>"
            << "<body><h1>Hello from the POCO Web Server</h1></body>"
            << "</html>";
    }
};

class HelloRequestHandlerFactory: public HTTPRequestHandlerFactory
{
    HTTPRequestHandler* createRequestHandler(const HTTPServerRequest&)
    {
        return new HelloRequestHandler;
    }
};

class WebServerApp: public ServerApplication
{
    void initialize(Application& self)
    {
        loadConfiguration();
        ServerApplication::initialize(self);
    }

    int main(const std::vector<std::string>&)
    {
        UInt16 port = static_cast<UInt16>(config().getUInt("port", 8080));

        HTTPServer srv(new HelloRequestHandlerFactory, port);
        srv.start();
        logger().information("HTTP Server started on port %hu.", port);
        waitForTerminationRequest();
        logger().information("Stopping HTTP Server...");
        srv.stop();

        return Application::EXIT_OK;
    }
};

POCO_SERVER_MAIN(WebServerApp)

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