Add X-Accel-Buffering to disable buffers in proxies (#5544)

Author: agners

supervisor/api/host.py

@@ -258,6 +258,7 @@ async def advanced_logs_handler(
                     if not headers_returned:
                         if cursor:
                             response.headers["X-First-Cursor"] = cursor
+                        response.headers["X-Accel-Buffering"] = "no"
                         await response.prepare(request)
                         headers_returned = True
                     # When client closes the connection while reading busy logs, we

supervisor/api/ingress.py

@@ -277,6 +277,7 @@ async def _handle_request(
             response.content_type = content_type
 
             try:
+                response.headers["X-Accel-Buffering"] = "no"
                 await response.prepare(request)
                 async for data in result.content.iter_chunked(4096):
                     await response.write(data)

supervisor/api/proxy.py

@@ -95,6 +95,7 @@ async def stream(self, request: web.Request):
             response = web.StreamResponse()
             response.content_type = request.headers.get(CONTENT_TYPE)
             try:
+                response.headers["X-Accel-Buffering"] = "no"
                 await response.prepare(request)
                 async for data in client.content:
                     await response.write(data)