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Boost.Beast Title

HTTP and WebSocket built on Boost.Asio in C++11

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Contents

Introduction

Beast is a C++ header-only library serving as a foundation for writing interoperable networking libraries by providing low-level HTTP/1, WebSocket, and networking protocol vocabulary types and algorithms using the consistent asynchronous model of Boost.Asio.

This library is designed for:

  • Symmetry: Algorithms are role-agnostic; build clients, servers, or both.

  • Ease of Use: Boost.Asio users will immediately understand Beast.

  • Flexibility: Users make the important decisions such as buffer or thread management.

  • Performance: Build applications handling thousands of connections or more.

  • Basis for Further Abstraction. Components are well-suited for building upon.

Appearances

CppCast 2017 CppCon 2016
Vinnie Falco Beast

Description

This software is currently in beta: interfaces may change. For recent changes see the CHANGELOG. As of July 20th, this library has been ACCEPTED into Boost without conditions. The first official release of Beast will appear in Boost 1.66.0, due in December.

Requirements

This library is for programmers familiar with Boost.Asio. Users who wish to use asynchronous interfaces should already know how to create concurrent network programs using callbacks or coroutines.

  • C++11: Robust support for most language features.
  • Boost: Boost.Asio and some other parts of Boost.
  • OpenSSL: Optional, for using TLS/Secure sockets.

When using Microsoft Visual C++, Visual Studio 2015 Update 3 or later is required.

One of these components is required in order to build the tests and examples:

  • Properly configured bjam/b2
  • CMake 3.7.2 or later (Windows only)

Building

Beast is header-only. To use it just add the necessary #include line to your source files, like this:

#include <boost/beast.hpp>

To build your program successfully, you'll need to add the Boost.System library to link with. If you use coroutines you'll also need to link with the Boost.Coroutine library. Please visit the Boost documentation for instructions on how to do this for your particular build system.

For the examples and tests, Beast provides build scripts for Boost.Build (bjam) and CMake (Windows). It is possible to generate Microsoft Visual Studio project files using CMake by executing these commands from the root of the repository:

mkdir bin
cd bin
cmake ..                                    # for 32-bit Windows builds

cd ..
mkdir bin64
cd bin64
cmake -G"Visual Studio 14 2015 Win64" ..    # for 64-bit Windows builds (VS2015)
cmake -G"Visual Studio 15 2017 Win64" ..    # for 64-bit Windows builds (VS2017)

The files in the repository are laid out thusly:

./
    bin/            Create this to hold executables and project files
    bin64/          Create this to hold 64-bit Windows executables and project files
    doc/            Source code and scripts for the documentation
    include/        Where the header files live
    extras/         Additional APIs, may change
    example/        Self contained example programs
    meta/           Metadata for Boost integration
    scripts/        Small scripts used with CI systems
    test/           Unit tests

Usage

These examples are complete, self-contained programs that you can build and run yourself (they are in the example directory).

http://www.boost.org/doc/libs/develop/libs/beast/doc/html/beast/quick_start.html

License

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)

Contact

Please report issues or questions here: https://github.com/boostorg/beast/issues


Contributing (We Need Your Help!)

If you would like to contribute to Beast and help us maintain high quality, consider performing code reviews on active pull requests. Any feedback from users and stakeholders, even simple questions about how things work or why they were done a certain way, carries value and can be used to improve the library. Code review provides these benefits:

  • Identify bugs
  • Documentation proof-reading
  • Adjust interfaces to suit use-cases
  • Simplify code

You can look through the Closed pull requests to get an idea of how reviews are performed. To give a code review just sign in with your GitHub account and then add comments to any open pull requests below, don't be shy!

https://github.com/boostorg/beast/pulls

Here are some resources to learn more about code reviews:

Beast thrives on code reviews and any sort of feedback from users and stakeholders about its interfaces. Even if you just have questions, asking them in the code review or in issues provides valuable information that can be used to improve the library - do not hesitate, no question is insignificant or unimportant!

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