Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for a snapshot of the master branch, built from commit db49c966ac.
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Examples

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

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.

Description

Source File

Source File (using SSL)

HTTP, synchronous

http_client_sync.cpp

http_client_sync_ssl.cpp

HTTP, asynchronous

http_client_async.cpp

http_client_async_ssl.cpp

HTTP, coroutine

http_client_coro.cpp

http_client_coro_ssl.cpp

HTTP crawl (asynchronous)

http_crawl.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.

Description

Source File

Source File (using SSL)

WebSocket, synchronous

websocket_client_sync.cpp

websocket_client_sync_ssl.cpp

WebSocket, asynchronous

websocket_client_async.cpp

websocket_client_async_ssl.cpp

WebSocket, coroutine

websocket_client_coro.cpp

websocket_client_coro_ssl.cpp

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

Description

Source File

Source File (using SSL)

HTTP, synchronous

http_server_sync.cpp

http_server_sync_ssl.cpp

HTTP, asynchronous

http_server_async.cpp

http_server_async_ssl.cpp

HTTP, coroutine

http_server_coro.cpp

http_server_coro_ssl.cpp

HTTP, stackless coroutine

http_server_stackless.cpp

http_server_stackless_ssl.cpp

HTTP, fast (optimized for speed)

http_server_fast.cpp

HTTP, small (optimized for space)

http_server_small.cpp

HTTP, flex (plain + SSL)

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.

Description

Source File

Source File (using SSL)

WebSocket, synchronous

websocket_server_sync.cpp

websocket_server_sync_ssl.cpp

WebSocket, asynchronous

websocket_server_async.cpp

websocket_server_async_ssl.cpp

WebSocket, coroutine

websocket_server_coro.cpp

websocket_server_coro_ssl.cpp

WebSocket, stackless coroutine

websocket_server_stackless.cpp

websocket_server_stackless_ssl.cpp

WebSocket, fast (suited for benchmarks)

websocket_server_fast.cpp

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

Description

Features

Sources

Advanced

  • Timeouts
  • Multi-threaded
  • HTTP pipelining
  • Parser-oriented HTTP reading
  • Dual protocols: HTTP and WebSocket
  • Clean exit via SIGINT (CTRL+C) or SIGTERM (kill)

advanced_server.cpp

Advanced, flex (plain + SSL)

  • 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)

advanced_server_flex.cpp

Chat Server, multi-threaded

  • 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)

chat-multi

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 CppCon 2018. The source code in the Beast example contains improvements to the original program.

Table 1.1. Chat WebSocket Server and JavaScript Client

Component

Features

Sources

Server

  • C++
  • Timeouts
  • Multi-threaded
  • Broadcast to multiple peers
  • Dual protocols: HTTP and WebSocket
  • Clean exit via SIGINT (CTRL+C) or SIGTERM (kill)

chat-multi

Client

  • JavaScript / HTML5
  • Runs in the browser
  • Delivered by the server
  • Only 60 lines total including UI
  • Completely portable graphics

chat_client.html



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