[/
    Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco 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)

    Official repository: https://github.com/boostorg/beast
]

[section Examples]
[block'''<?dbhtml stop-chunking?>''']

Source code and build scripts for these programs are located
in the [path_link example example] directory.

[/-----------------------------------------------------------------------------]

[section Clients]

These HTTP clients submit a GET request to a server specified on the command
line, and prints the resulting response. The crawl client asynchronously
fetches the document root of the 10,000 top ranked domains, this may be
used to evaluate robustness. All asynchronous clients support timeouts.

[table
[[Description] [Source File] [Source File (using SSL)]]
[
        [HTTP, synchronous]
        [[path_link example/http/client/sync/http_client_sync.cpp http_client_sync.cpp]]
        [[path_link example/http/client/sync-ssl/http_client_sync_ssl.cpp http_client_sync_ssl.cpp]]
][
        [HTTP, asynchronous]
        [[path_link example/http/client/async/http_client_async.cpp http_client_async.cpp]]
        [[path_link example/http/client/async-ssl/http_client_async_ssl.cpp http_client_async_ssl.cpp]]
][
        [HTTP, asynchronous Unix domain sockets]
        [[path_link example/http/client/async-local/http_client_async_local.cpp http_client_async_local.cpp]]
        []
][
        [HTTP, asynchronous using __system_executor__]
        []
        [[path_link example/http/client/async-ssl-system-executor/http_client_async_ssl_system_executor.cpp http_client_async_ssl_system_executor.cpp]]
][
        [HTTP, coroutine]
        [[path_link example/http/client/coro/http_client_coro.cpp http_client_coro.cpp]]
        [[path_link example/http/client/coro-ssl/http_client_coro_ssl.cpp http_client_coro_ssl.cpp]]
][
        [HTTP, C++20 coroutine]
        [[path_link example/http/client/awaitable/http_client_awaitable.cpp http_client_awaitable.cpp]]
        [[path_link example/http/client/awaitable-ssl/http_client_awaitable_ssl.cpp http_client_awaitable_ssl.cpp]]
][
        [HTTP crawl (asynchronous)]
        [[path_link example/http/client/crawl/http_crawl.cpp http_crawl.cpp]]
        []
][
        [HTTP json_body (synchronous)]
        [
                [path_link example/http/client/body/json_body.hpp json_body.hpp]
                [path_link example/http/client/body/json_client.cpp json_client.cpp]
        ]
        []
][
        [HTTP client for all methods (synchronous)]
        [[path_link example/http/client/methods/http_client_methods.cpp http_client_methods.cpp]]
        []
]]

These WebSocket clients connect to a
server and send a message, then receive a message and print the response
before disconnecting. All asynchronous clients support timeouts.

[table
[[Description] [Source File] [Source File (using SSL)]]
[
        [WebSocket, synchronous]
        [[path_link example/websocket/client/sync/websocket_client_sync.cpp websocket_client_sync.cpp]]
        [[path_link example/websocket/client/sync-ssl/websocket_client_sync_ssl.cpp websocket_client_sync_ssl.cpp]]
][
        [WebSocket, asynchronous]
        [[path_link example/websocket/client/async/websocket_client_async.cpp websocket_client_async.cpp]]
        [[path_link example/websocket/client/async-ssl/websocket_client_async_ssl.cpp websocket_client_async_ssl.cpp]]
][
        [WebSocket, asynchronous Unix domain sockets]
        [[path_link example/websocket/client/async-local/websocket_client_async_local.cpp websocket_client_async_local.cpp]]
        []
][
        [WebSocket, asynchronous using __system_executor__]
        []
        [[path_link example/websocket/client/async-ssl-system-executor/websocket_client_async_ssl_system_executor.cpp websocket_client_async_ssl_system_executor.cpp]]
][
        [WebSocket, coroutine]
        [[path_link example/websocket/client/coro/websocket_client_coro.cpp websocket_client_coro.cpp]]
        [[path_link example/websocket/client/coro-ssl/websocket_client_coro_ssl.cpp websocket_client_coro_ssl.cpp]]
][
        [WebSocket, C++20 coroutine]
        [[path_link example/websocket/client/awaitable/websocket_client_awaitable.cpp websocket_client_awaitable.cpp]]
        []
]]

[endsect]

[/-----------------------------------------------------------------------------]

[section Servers]

These HTTP servers deliver files from a root directory specified on the
command line. All asynchronous servers support timeouts.

[table
[[Description] [Source File] [Source File (using SSL)]]
[
        [HTTP, synchronous]
        [[path_link example/http/server/sync/http_server_sync.cpp http_server_sync.cpp]]
        [[path_link example/http/server/sync-ssl/http_server_sync_ssl.cpp http_server_sync_ssl.cpp]]
][
        [HTTP, asynchronous]
        [[path_link example/http/server/async/http_server_async.cpp http_server_async.cpp]]
        [[path_link example/http/server/async-ssl/http_server_async_ssl.cpp http_server_async_ssl.cpp]]
][
        [HTTP, asynchronous Unix domain sockets]
        [[path_link example/http/server/async-local/http_server_async_local.cpp http_server_async_local.cpp]]
        []
][
        [HTTP, coroutine]
        [[path_link example/http/server/coro/http_server_coro.cpp http_server_coro.cpp]]
        [[path_link example/http/server/coro-ssl/http_server_coro_ssl.cpp http_server_coro_ssl.cpp]]
][
        [HTTP, stackless coroutine]
        [[path_link example/http/server/stackless/http_server_stackless.cpp http_server_stackless.cpp]]
        [[path_link example/http/server/stackless-ssl/http_server_stackless_ssl.cpp http_server_stackless_ssl.cpp]]
][
        [HTTP, C++ 20 coroutine]
        [[path_link example/http/server/awaitable/http_server_awaitable.cpp http_server_awaitable.cpp]]
][
        [HTTP, fast (optimized for speed)]
        [[path_link example/http/server/fast/http_server_fast.cpp http_server_fast.cpp]]
        []
][
        [HTTP, small (optimized for space)]
        [[path_link example/http/server/small/http_server_small.cpp http_server_small.cpp]]
        []
][
        [HTTP, flex (plain + SSL)]
        []
        [[path_link example/http/server/flex/http_server_flex.cpp http_server_flex.cpp]]
]]

These WebSocket servers echo back any message received, keeping the
session open until the client disconnects. All asynchronous servers
support timeouts.

[table
[[Description] [Source File] [Source File (using SSL)]]
[
        [WebSocket, synchronous]
        [[path_link example/websocket/server/sync/websocket_server_sync.cpp websocket_server_sync.cpp]]
        [[path_link example/websocket/server/sync-ssl/websocket_server_sync_ssl.cpp websocket_server_sync_ssl.cpp]]
][
        [WebSocket, asynchronous]
        [[path_link example/websocket/server/async/websocket_server_async.cpp websocket_server_async.cpp]]
        [[path_link example/websocket/server/async-ssl/websocket_server_async_ssl.cpp websocket_server_async_ssl.cpp]]
][
        [WebSocket, asynchronous Unix domain sockets]
        [[path_link example/websocket/server/async-local/websocket_server_async_local.cpp websocket_server_async_local.cpp]]
        []
][
        [WebSocket, coroutine]
        [[path_link example/websocket/server/coro/websocket_server_coro.cpp websocket_server_coro.cpp]]
        [[path_link example/websocket/server/coro-ssl/websocket_server_coro_ssl.cpp websocket_server_coro_ssl.cpp]]
][
        [WebSocket, stackless coroutine]
        [[path_link example/websocket/server/stackless/websocket_server_stackless.cpp websocket_server_stackless.cpp]]
        [[path_link example/websocket/server/stackless-ssl/websocket_server_stackless_ssl.cpp websocket_server_stackless_ssl.cpp]]
][
        [WebSocket, C++ 20 coroutine]
        [[path_link example/websocket/server/awaitable/websocket_server_awaitable.cpp websocket_server_awaitable.cpp]]
        []
][
        [WebSocket, fast (suited for benchmarks)]
        [[path_link example/websocket/server/fast/websocket_server_fast.cpp websocket_server_fast.cpp]]
        []
]]

[endsect]

[/-----------------------------------------------------------------------------]

[section Servers (Advanced)]

These servers offer both HTTP and WebSocket services on the same port,
and illustrate the implementation of advanced features.

[table
[[Description] [Features] [Sources]]
[
        [Advanced]
        [[itemized_list
            [Timeouts]
            [Multi-threaded]
            [HTTP pipelining]
            [Parser-oriented HTTP reading]
            [Dual protocols: HTTP and WebSocket]
            [Clean exit via SIGINT (CTRL+C) or SIGTERM (kill)]
        ]]
        [[path_link example/advanced/server/advanced_server.cpp advanced_server.cpp]]
][
        [Advanced, flex (plain + SSL)]
        [[itemized_list
            [Timeouts]
            [Multi-threaded]
            [HTTP pipelining]
            [Parser-oriented HTTP reading]
            [Dual protocols: HTTP and WebSocket]
            [Flexible ports: plain and SSL on the same port]
            [Clean exit via SIGINT (CTRL+C) or SIGTERM (kill)]
        ]]
        [[path_link example/advanced/server-flex/advanced_server_flex.cpp advanced_server_flex.cpp]]
][
         [Advanced, flex (plain + SSL) with awaitable]
         [[itemized_list
             [Timeouts]
             [Multi-threaded]
             [HTTP pipelining]
             [Parser-oriented HTTP reading]
             [Dual protocols: HTTP and WebSocket]
             [Flexible ports: plain and SSL on the same port]
             [Clean exit via SIGINT (CTRL+C) or SIGTERM (kill)]
             [Usage of cancellation_signals]
         ]]
         [[path_link example/advanced/server-flex-awaitable/advanced_server_flex_awaitable.cpp advanced_server_flex_awaitable.cpp]]
 ][
        [Chat Server, multi-threaded]
        [[itemized_list
            [Multi-threaded]
            [Broadcasting Messages]
            [Multi-user Chat Server]
            [JavaScript Browser Client]
            [Parser-oriented HTTP reading]
            [Dual protocols: HTTP and WebSocket]
            [Clean exit via SIGINT (CTRL+C) or SIGTERM (kill)]
        ]]
        [[path_link example/websocket/server/chat-multi chat-multi]]
]]

[endsect]

[/-----------------------------------------------------------------------------]

[section:chat_server Chat Server __video__]

This example demonstrates a websocket chat server, allowing multiple
users to connect and participate in live, group messaging. It comes
with a tiny front end implemented in JavaScript and HTML5 which runs
in any browser. The example is accompanied by a one hour presentation
which provides a discussion of networking concepts, followed by in-depth
explanation of how the client and server are constructed. This talk
was delivered at [@https://cppcon.org CppCon 2018]. The source code
in the Beast example contains improvements to the original program.

[table Chat WebSocket Server and JavaScript Client
[[Component] [Features] [Sources]]
[
  [Server]
  [[itemized_list
      [C++]
      [Timeouts]
      [Multi-threaded]
      [Broadcast to multiple peers]
      [Dual protocols: HTTP and WebSocket]
      [Clean exit via SIGINT (CTRL+C) or SIGTERM (kill)]
  ]]
  [[path_link example/websocket/server/chat-multi chat-multi]]
][
  [Client]
  [[itemized_list
      [JavaScript / HTML5]
      [Runs in the browser]
      [Delivered by the server]
      [Only 60 lines total including UI]
      [Completely portable graphics]
  ]]
  [[path_link example/websocket/server/chat-multi/chat_client.html chat_client.html]]
]]

[/ "Get rich quick! Using Boost.Beast WebSockets and Networking TS"]
'''
<mediaobject>
  <videoobject>
    <videodata fileref="https://www.youtube.com/embed/7FQwAjELMek"
        align="center" contentwidth="560" contentdepth="315"/>
  </videoobject>
</mediaobject>
'''

[endsect]

[/-----------------------------------------------------------------------------]

[endsect]
