add missed exa

backend/open_webui/routers/retrieval.py

@@ -1747,6 +1747,16 @@ def search_web(request: Request, engine: str, query: str) -> list[SearchResult]:
             )
         else:
             raise Exception("No TAVILY_API_KEY found in environment variables")
+    elif engine == "exa":
+        if request.app.state.config.EXA_API_KEY:
+            return search_exa(
+                request.app.state.config.EXA_API_KEY,
+                query,
+                request.app.state.config.WEB_SEARCH_RESULT_COUNT,
+                request.app.state.config.WEB_SEARCH_DOMAIN_FILTER_LIST,
+            )
+        else:
+            raise Exception("No EXA_API_KEY found in environment variables")
     elif engine == "searchapi":
         if request.app.state.config.SEARCHAPI_API_KEY:
             return search_searchapi(