1 Commits

Include renames

Author	SHA1	Message	Date
3 people	02f85a8ad5	feat(mcp): transport abstraction, stdio/UDS transports, and OAuth fixes (#721) ... * feat(mcp): transport abstraction, stdio/UDS transports, and OAuth fixes Extract McpTransport trait from HTTP-coupled McpClient, enabling pluggable transport backends. Implements stdio and Unix domain socket transports for local MCP server integration, fixes OAuth discovery per RFC 9728, and adds SSRF protection. Transport abstraction (Step 2): - McpTransport trait with send(), shutdown(), supports_http_features() - HttpMcpTransport extracted from McpClient with SSE parsing, session tracking - Shared JSON-RPC framing helpers (write_jsonrpc_line, spawn_jsonrpc_reader) - McpClient refactored to hold Arc<dyn McpTransport> Stdio transport (#652, Step 4): - StdioMcpTransport spawns child process, communicates via stdin/stdout - McpProcessManager for lifecycle management with exponential backoff restart - Background stderr drain task for debug logging Unix domain socket transport (#134, Step 5): - UnixMcpTransport connects to existing Unix sockets - Reuses shared JSON-RPC framing from transport.rs HTML error body sanitization (#263, Step 1): - sanitize_error_body() detects HTML, strips control chars, truncates to 500 Custom headers (#639, Step 3): - headers field on McpServerConfig, merged into every HTTP request - --header CLI arg for `mcp add` Config and CLI updates (Step 6): - McpTransportConfig tagged enum (Http/Stdio/Unix) with serde support - EffectiveTransport for zero-copy config dispatch - CLI: --transport, --command, --arg, --env, --socket flags for `mcp add` - `mcp list` shows transport type OAuth fixes (#299, Step 8): - Multi-strategy discovery (401-based, RFC 9728, direct) - RFC 8707 resource parameter in auth and refresh flows - SSRF protection with IPv4-mapped IPv6 bypass detection - Well-known URI construction per RFC 8414 Closes #652, #134, #639, #263, #299 Co-Authored-By: Claude Opus 4.6 <[email protected]> * fix(mcp): address audit findings from crate review - Fix SSRF bypass: make validate_url_safe async with DNS resolution to block hostnames that resolve to private/link-local IPs - Fix UTF-8 truncation: use char-based truncation in sanitize_error_body to avoid panicking on multi-byte characters - Fix SSE parser: process only complete lines to handle chunks split across boundaries, add 10MB buffer size limit - Add debug_assert for transport type mismatch in new_with_config - Propagate custom headers in new_with_transport constructor - Deduplicate effective_transport() calls in CLI list command - Gate test-only accessors with #[cfg(test)] to eliminate dead_code warnings - Document JSON-RPC notification id:0 limitation in protocol.rs - Document total backoff wait time (31s) in process.rs - Add regression test for multi-byte UTF-8 truncation Co-Authored-By: Claude Opus 4.6 <[email protected]> * fix(mcp): address PR review findings from Copilot, Gemini, and zmanian Moderate/High fixes: - Plumb custom headers through new_authenticated constructor - Restrict HTTP to localhost only in validate_url_safe (prevent plaintext credential leaks over non-localhost HTTP) - Add mcp_process_manager.shutdown_all() to app shutdown path to prevent orphaning stdio child processes - Validate discovered authorization_url before opening browser (prevent malicious MCP server redirecting to phishing page) Medium fixes: - Upgrade debug_assert to assert in new_with_config (fires in release) - Remove pending map entry on Ok(Err(_)) in stdio/unix send() to avoid stale entries and unnecessary 30s waits - Shut down old transport in try_restart() before spawning replacement - Redact env var values in mcp list --verbose (may contain secrets) - Drain pending requests on shutdown to wake waiters immediately - Add IPv6 link-local, site-local, unique-local, and documentation ranges to is_dangerous_ip SSRF protection Low fixes: - Truncate logged JSON parse error lines to 200 chars (prevent sensitive data in logs) - Remove misleading shutdown comment in unix_transport - Use tempfile::tempdir() instead of hardcoded /tmp/ path in test - Adopt main's improved sanitize_error_body (HTML tag stripping, 200-char truncation with char_indices) Co-Authored-By: Claude Opus 4.6 <[email protected]> * fix(mcp): gate unix_transport with #[cfg(unix)] for Windows compat - Add #[cfg(unix)] to unix_transport module declaration - Add #[cfg(unix)]/#[cfg(not(unix))] branches in app.rs for Unix socket MCP server setup - Remove unused sanitize_error_body import in client.rs tests [skip-regression-check] --------- Co-authored-by: Claude Opus 4.6 <[email protected]>	2026-03-09 02:47:42 +00:00