expose x-consumer-id header in cors

emmet-api/app.py

@@ -5,6 +5,7 @@
 
 logging.getLogger("uvicorn.access").handlers = []
 from asgi_logger import AccessLoggerMiddleware
+from fastapi.middleware.cors import CORSMiddleware
 
 from material_resources import resources as materials_resources
 from molecule_resources import resources as molecule_resources
@@ -29,5 +30,9 @@
     AccessLoggerMiddleware,
     format='%(h)s %(t)s %(m)s %(U)s?%(q)s %(H)s %(s)s %(b)s "%(f)s" "%(a)s" %(D)s %(p)s %({x-consumer-id}i)s',
 )
+app.add_middleware(
+    CORSMiddleware,
+    expose_headers=["x-consumer-id"]
+)
 delta = time.perf_counter() - start
 logger.warning(f"Startup took {delta:.1f}s")