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Migrate removed deprecated APIs:
- io_service -> io_context
- io_service::work -> executor_work_guard
- resolver::query/iterator -> resolver::resolve() with results_type
- address::from_string() -> make_address()
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Breaking Changes (1.33.0)
- deferred as default completion token — can omit token in coroutines: co_await socket.async_read_some(buf)
- cancel_after / cancel_at — timeout any async operation: co_await sock.async_read_some(buf, cancel_after(5s))
- Partial completion token adapters — as_tuple, redirect_error, bind_executor etc. composable via pipe: co_await (async_write(sock, buf) | as_tuple | cancel_after(10s))
- composed — simpler alternative to async_compose for stateful operation implementations
- co_composed moved out of experimental
1.35.0 — Allocator & Resolver
- Allocator constructors for io_context and thread_pool — control memory allocation for services, I/O objects, strands
- Configurable resolver thread pool ("resolver"/"threads")
- Timer heap pre-allocation ("timer"/"heap_reserve")
1.37.0 — Inline Executors & Reactor Tuning
- inline_executor — always executes inline (useful as completion executor)
- inline_or_executor<> — tries inline first, falls back to wrapped executor
- New dispatch/post/defer overloads that run a function on one executor and deliver result to a handler on another
- redirect_disposition — captures disposition into a variable (like redirect_error but generic)
- Reactor config: reset_edge_on_partial_read, use_eventfd, use_timerfd
Notable Fixes
- Resource leak in awaitable move assignment (1.37.0)
- Memory leak in SSL stream move assignment (1.37.0)
- Thread sanitizer issue in kqueue reactor (1.37.0)
- co_spawn non-reentrant completion handler fix (1.36.0)
- Windows file append mode fix (1.32.0)
- SSL engine move assignment leak (1.33.0)
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The main goal of this change is to eliminate the cpr back-end altogether and replace it with the curl implementation. I would expect to drop cpr as soon as we feel happy with the libcurl back-end. That would leave us with a direct dependency on libcurl only, and cpr can be eliminated as a dependency.
### HttpClient Backend Overhaul
- Implemented a new **libcurl-based HttpClient** backend (`httpclientcurl.cpp`, ~2000 lines)
as an alternative to the cpr-based one
- Made HttpClient backend **configurable at runtime** via constructor arguments
and `-httpclient=...` CLI option (for zen, zenserver, and tests)
- Extended HttpClient test suite to cover multipart/content-range scenarios
### Unix Domain Socket Support
- Added Unix domain socket support to **httpasio** (server side)
- Added Unix domain socket support to **HttpClient**
- Added Unix domain socket support to **HttpWsClient** (WebSocket client)
- Templatized `HttpServerConnectionT<SocketType>` and `WsAsioConnectionT<SocketType>`
to handle TCP, Unix, and SSL sockets uniformly via `if constexpr` dispatch
### HTTPS Support
- Added **preliminary HTTPS support to httpasio** (for Mac/Linux via OpenSSL)
- Added **basic HTTPS support for http.sys** (Windows)
- Implemented HTTPS test for httpasio
- Split `InitializeServer` into smaller sub-functions for http.sys
### Other Notable Changes
- Improved **zenhttp-test stability** with dynamic port allocation
- Enhanced port retry logic in http.sys (handles ERROR_ACCESS_DENIED)
- Fatal signal/exception handlers for backtrace generation in tests
- Added `zen bench http` subcommand to exercise network + HTTP client/server communication stack
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- **Frontend dashboard overhaul**: Unified compute/main dashboards into a single shared UI. Added new pages for cache, projects, metrics, sessions, info (build/runtime config, system stats). Added live-update via WebSockets with pause control, sortable detail tables, themed styling. Refactored compute/hub/orchestrator pages into modular JS.
- **HTTP server fixes and stats**: Fixed http.sys local-only fallback when default port is in use, implemented root endpoint redirect for http.sys, fixed Linux/Mac port reuse. Added /stats endpoint exposing HTTP server metrics (bytes transferred, request rates). Added WebSocket stats tracking.
- **OTEL/diagnostics hardening**: Improved OTLP HTTP exporter with better error handling and resilience. Extended diagnostics services configuration.
- **Session management**: Added new sessions service with HTTP endpoints for registering, updating, querying, and removing sessions. Includes session log file support. This is still WIP.
- **CLI subcommand support**: Added support for commands with subcommands in the zen CLI tool, with improved command dispatch.
- **Misc**: Exposed CPU usage/hostname to frontend, fixed JS compact binary float32/float64 decoding, limited projects displayed on front page to 25 sorted by last access, added vscode:// link support.
Also contains some fixes from TSAN analysis.
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Makes all test cases part of a test suite. Test suites are named after the module and the name of the file containing the implementation of the test.
* This allows for better and more predictable filtering of which test cases to run which should also be able to reduce the time CI spends in tests since it can filter on the tests for that particular module.
Also improves `xmake test` behaviour:
* instead of an explicit list of projects just enumerate the test projects which are available based on build system state
* also introduces logic to avoid running `xmake config` unnecessarily which would invalidate the existing build and do lots of unnecessary work since dependencies were invalidated by the updated config
* also invokes build only for the chosen test targets
As a bonus, also adds `xmake sln --open` which allows opening IDE after generation of solution/xmake project is done.
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* This branch adds full WebSocket (RFC 6455) support to the HTTP server layer, covering both transport backends, a client, and tests.
- **`websocket.h`** -- Core interfaces: `WebSocketOpcode`, `WebSocketMessage`, `WebSocketConnection` (ref-counted), and `IWebSocketHandler`. Services opt in to WebSocket support by implementing `IWebSocketHandler` alongside their existing `HttpService`.
- **`httpwsclient.h`** -- `HttpWsClient`: an ASIO-backed `ws://` client with both standalone (own thread) and shared `io_context` modes. Supports connect timeout and optional auth token injection via `IWsClientHandler` callbacks.
- **`wsasio.cpp/h`** -- `WsAsioConnection`: WebSocket over ASIO TCP. Takes over the socket after the HTTP 101 handshake and runs an async read/write loop with a queued write path (guarded by `RwLock`).
- **`wshttpsys.cpp/h`** -- `WsHttpSysConnection`: WebSocket over http.sys opaque-mode connections (Windows only). Uses `HttpReceiveRequestEntityBody` / `HttpSendResponseEntityBody` via IOCP, sharing the same threadpool as normal http.sys traffic. Self-ref lifetime management ensures graceful drain of outstanding async ops.
- **`httpsys_iocontext.h`** -- Tagged `OVERLAPPED` wrapper (`HttpSysIoContext`) used to distinguish normal HTTP transactions from WebSocket read/write completions in the single IOCP callback.
- **`wsframecodec.cpp/h`** -- `WsFrameCodec`: static helpers for parsing (unmasked and masked) and building (unmasked server frames and masked client frames) RFC 6455 frames across all three payload length encodings (7-bit, 16-bit, 64-bit). Also computes `Sec-WebSocket-Accept` keys.
- **`clients/httpwsclient.cpp`** -- `HttpWsClient::Impl`: ASIO-based client that performs the HTTP upgrade handshake, then hands off to the frame codec for the read loop. Manages its own `io_context` thread or plugs into an external one.
- **`httpasio.cpp`** -- ASIO server now detects `Upgrade: websocket` requests, checks the matching `HttpService` for `IWebSocketHandler` via `dynamic_cast`, performs the RFC 6455 handshake (101 response), and spins up a `WsAsioConnection`.
- **`httpsys.cpp`** -- Same upgrade detection and handshake logic for the http.sys backend, using `WsHttpSysConnection` and `HTTP_SEND_RESPONSE_FLAG_OPAQUE`.
- **`httpparser.cpp/h`** -- Extended to surface the `Upgrade` / `Connection` / `Sec-WebSocket-Key` headers needed by the handshake.
- **`httpcommon.h`** -- Minor additions (probably new header constants or response codes for the WS upgrade).
- **`httpserver.h`** -- Small interface changes to support WebSocket registration.
- **`zenhttp.cpp` / `xmake.lua`** -- New source files wired in; build config updated.
- **Unit tests** (`websocket.framecodec`): round-trip encode/decode for text, binary, close frames; all three payload sizes; masked and unmasked variants; RFC 6455 `Sec-WebSocket-Accept` test vector.
- **Integration tests** (`websocket.integration`): full ASIO server tests covering handshake (101), normal HTTP coexistence, echo, server-push broadcast, client close handshake, ping/pong auto-response, sequential messages, and rejection of upgrades on non-WS services.
- **Client tests** (`websocket.client`): `HttpWsClient` connect+echo+close, connection failure (bad port -> close code 1006), and server-initiated close.
* changed HttpRequestParser::ParseCurrentHeader to use switch instead of if/else chain
* remove spurious printf
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Co-authored-by: Stefan Boberg <[email protected]>
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