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Tom Quist 4d8d44721d Fix MCP API proxy support for streaming and headers (#6461 )

* Fix MCP API proxy support for streaming and headers

This commit fixes two issues with using the core API core/api/mcp through
the API proxy:

1. **Streaming support**: The proxy now detects text/event-stream responses
   and properly streams them instead of buffering all data. This is required
   for MCP's Server-Sent Events (SSE) transport.

2. **Header forwarding**: Added MCP-required headers to the forwarded headers:
   - Accept: Required for content negotiation
   - Last-Event-ID: Required for resuming broken SSE connections
   - Mcp-Session-Id: Required for session management across requests

The proxy now also preserves MCP-related response headers (Mcp-Session-Id)
and sets X-Accel-Buffering to "no" for streaming responses to prevent
buffering by intermediate proxies.

Tests added to verify:
- MCP headers are properly forwarded to Home Assistant
- Streaming responses (text/event-stream) are handled correctly
- Response headers are preserved

* Refactor: reuse stream logic for SSE responses (#3)

* Fix ruff format + cover streaming payload error

* Fix merge error

* Address review comments (headers / streaming proxy) (#4)

* Address review: header handling for streaming/non-streaming

* Forward MCP-Protocol-Version and Origin headers

* Do not forward Origin header through API proxy (#5)

---------

Co-authored-by: Stefan Agner <stefan@agner.ch>

2026-02-04 17:28:11 +01:00

middleware

Fix mypy issues in plugins and resolution (#5946 )

2025-06-16 14:12:47 -04:00

__init__.py

Strip ANSI escape color sequences from /latest log responses (#6319 )

2025-11-19 09:39:24 +01:00

conftest.py

Add optional no_colors query parameter to advanced logs endpoints (#6326 )

2025-11-21 09:29:15 +01:00

test_addons.py

Improve CpuArch type safety with explicit conversions (#6524 )