From 9942efdf6d6b6177b2503fa5a74a6ac38670cab3 Mon Sep 17 00:00:00 2001
From: Gabriel Almeida <gabrielf.almeida90@gmail.com>
Date: Tue, 14 Mar 2023 10:27:47 -0300
Subject: [PATCH 1/2] fix: set workers to 0 if env variable is not set

---
 langflow/backend/langflow_backend/__main__.py | 21 ++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/langflow/backend/langflow_backend/__main__.py b/langflow/backend/langflow_backend/__main__.py
index 6764dc350..87c15b5a2 100644
--- a/langflow/backend/langflow_backend/__main__.py
+++ b/langflow/backend/langflow_backend/__main__.py
@@ -1,4 +1,7 @@
 import multiprocessing
+import os
+import platform
+
 from langflow_backend.main import create_app
 
 import typer
@@ -8,6 +11,18 @@ from pathlib import Path
 from langflow_backend.server import LangflowApplication
 
 
+def get_number_of_workers(workers=None):
+    if workers is None:
+        workers = (
+            int(os.environ.get("OBJC_DISABLE_INITIALIZE_FORK_SAFETY", "0") == "YES")
+            if platform.system() == "Darwin"
+            else 1
+        )
+    elif workers == -1:
+        workers = (multiprocessing.cpu_count() * 2) + 1
+    return workers
+
+
 def serve(
     workers: int = None,
     timeout: int = None,
@@ -21,17 +36,13 @@ def serve(
         StaticFiles(directory=static_files_dir, html=True),
         name="static",
     )
-    if not workers:
-        workers = 1
-    elif workers == -1:
-        workers = (multiprocessing.cpu_count() * 2) + 1
 
     if not timeout:
         timeout = 60
 
     options = {
         "bind": "127.0.0.1:5003",
-        "workers": workers,
+        "workers": get_number_of_workers(workers),
         "worker_class": "uvicorn.workers.UvicornWorker",
         "timeout": timeout,
     }

From f9a049a84d494ec86ec33b68eb2596e14612ad32 Mon Sep 17 00:00:00 2001
From: Gabriel Almeida <gabrielf.almeida90@gmail.com>
Date: Tue, 14 Mar 2023 10:48:18 -0300
Subject: [PATCH 2/2] fix: if on macOS use uvicorn

---
 langflow/backend/langflow_backend/__main__.py | 22 +++++++++++--------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/langflow/backend/langflow_backend/__main__.py b/langflow/backend/langflow_backend/__main__.py
index 87c15b5a2..ee3a5e7d5 100644
--- a/langflow/backend/langflow_backend/__main__.py
+++ b/langflow/backend/langflow_backend/__main__.py
@@ -8,16 +8,10 @@ import typer
 from fastapi.staticfiles import StaticFiles
 from pathlib import Path
 
-from langflow_backend.server import LangflowApplication
-
 
 def get_number_of_workers(workers=None):
     if workers is None:
-        workers = (
-            int(os.environ.get("OBJC_DISABLE_INITIALIZE_FORK_SAFETY", "0") == "YES")
-            if platform.system() == "Darwin"
-            else 1
-        )
+        workers = 1
     elif workers == -1:
         workers = (multiprocessing.cpu_count() * 2) + 1
     return workers
@@ -40,14 +34,24 @@ def serve(
     if not timeout:
         timeout = 60
 
+    host = "127.0.0.1"
+    port = 5003
     options = {
-        "bind": "127.0.0.1:5003",
+        "bind": f"{host}:{port}",
         "workers": get_number_of_workers(workers),
         "worker_class": "uvicorn.workers.UvicornWorker",
         "timeout": timeout,
     }
 
-    LangflowApplication(app, options).run()
+    if platform.system() == "Darwin":
+        # Run using uvicorn on MacOS
+        import uvicorn
+
+        uvicorn.run(app, host=host, port=port, log_level="info")
+    else:
+        from langflow_backend.server import LangflowApplication
+
+        LangflowApplication(app, options).run()
 
 
 def main():