hello_server.cpp

The smallest complete server: two REST routes, a path argument, a query argument with a default, and graceful shutdown on SIGINT.

rest_crud_server.cpp

A JSON REST API: CRUD routes over an in-memory store, typed request bodies via boost::describe, a multipart import of a text file, a domain exception mapped to 404 by a soft error handler, and an OpenAPI 3.1 document generated from the routes.

htdocs_server.cpp

A single-page application behind handler::htdocs: hashed assets under /static cached as immutable with precompressed variants and download headers from on_response, and the application shell as the fallback for client-side routes, on a multi-threaded io_context.

connection_state_server.cpp

Per-connection state with basic_http<conn_state>: handlers receive the connection's object by reference and use it for counting and a quota.

cookie_session_server.cpp

Cookie-keyed sessions with context_store and with_session: login, logout, create_if_missing versus require, and idle expiry.

streaming_server.cpp

Streaming in both directions: server-sent events from a timer, a JSON stream from an async_generator, files streamed from disk with spliced generators, and uploads consumed through body_reader and multipart_reader without buffering.

cancellation_server.cpp

The cancellation model end to end: an event stream that stops when its client disconnects or the server shuts down, a JSON-RPC job that checks its request_scope and is cancelled by id through endpoint::cancel, an MCP tool with progress cancelled by notifications/cancelled, and a plain handler that finishes on SIGINT while the streams stop. RAII guards in the nested helpers log every interrupted frame.

proxy_server.cpp

Asynchronous handlers: a coroutine that fetches an upstream URL with Beast and returns the response, plus a timer-based delay route.

tls_server.cpp

HTTPS with session::https and server::tls: certificate and key from PEM files, handlers registered as for plain HTTP.

websocket_server.cpp

Protocol upgrade to WebSocket via register_raw_handler, with an echo loop.

jsonrpc_server.cpp

A JSON-RPC 2.0 calculator: named parameters, batches, notifications, a custom error mapper, and per-client state through with_session.

mcp_server.cpp

An MCP server over Streamable HTTP: tools with generated input schemas, resources and URI templates, a prompt, resource subscriptions, per-session state, a tool returning typed content with an embedded resource, a blob resource, a tool that notifies its own caller through session_info, a tool that asks the user to confirm through elicitation, CORS for browser clients, and Origin validation.

taskboard_server.cpp

One task board exposed over REST (cookie sessions, constrained arguments, OpenAPI with a bearer scheme and components), JSON-RPC and MCP (annotated tools, templated resources, prompt completion, elicitation, logging), plus a per-user event stream under with_session, CORS, a request-id interceptor, an admin-token interceptor scoped to one route that hands a principal to the handler through attribute_arg, and a multi-threaded io_context with graceful shutdown.

mcp_stdio_server.cpp

The same MCP tools served over stdio, the transport desktop clients launch locally.