From 6534d324f3dce2e1e4927932660d5e5e8bcab202 Mon Sep 17 00:00:00 2001
From: Miguel Grinberg <miguel.grinberg@gmail.com>
Date: Wed, 11 Dec 2019 22:50:25 +0000
Subject: [PATCH] Initialize the client's SIGINT signal handler if a client is
 created (Fixes #147)

---
 engineio/client.py                       | 6 +++++-
 examples/client/asyncio/simple_client.py | 5 ++++-
 examples/client/threads/simple_client.py | 5 ++++-
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/engineio/client.py b/engineio/client.py
index 0071eebc..51a21d36 100644
--- a/engineio/client.py
+++ b/engineio/client.py
@@ -46,7 +46,7 @@ def signal_handler(sig, frame):
         return signal.default_int_handler(sig, frame)
 
 
-original_signal_handler = signal.signal(signal.SIGINT, signal_handler)
+original_signal_handler = None
 
 
 class Client(object):
@@ -76,6 +76,10 @@ def __init__(self,
                  json=None,
                  request_timeout=5,
                  ssl_verify=True):
+        global original_signal_handler
+        if original_signal_handler is None:
+            original_signal_handler = signal.signal(signal.SIGINT,
+                                                    signal_handler)
         self.handlers = {}
         self.base_url = None
         self.transports = None
diff --git a/examples/client/asyncio/simple_client.py b/examples/client/asyncio/simple_client.py
index 4197f8d1..c2c89605 100644
--- a/examples/client/asyncio/simple_client.py
+++ b/examples/client/asyncio/simple_client.py
@@ -5,6 +5,7 @@
 loop = asyncio.get_event_loop()
 eio = engineio.AsyncClient()
 exit_event = asyncio.Event()
+original_signal_handler = None
 
 
 async def send_hello():
@@ -33,6 +34,8 @@ def on_message(data):
 def signal_handler(sig, frame):
     exit_event.set()
     print('exiting')
+    if callable(original_signal_handler):
+        original_signal_handler(sig, frame)
 
 
 async def start_client():
@@ -41,5 +44,5 @@ async def start_client():
 
 
 if __name__ == '__main__':
-    signal.signal(signal.SIGINT, signal_handler)
+    original_signal_handler = signal.signal(signal.SIGINT, signal_handler)
     loop.run_until_complete(start_client())
diff --git a/examples/client/threads/simple_client.py b/examples/client/threads/simple_client.py
index b95c23af..a6b10f63 100644
--- a/examples/client/threads/simple_client.py
+++ b/examples/client/threads/simple_client.py
@@ -4,6 +4,7 @@
 
 eio = engineio.Client()
 exit_event = threading.Event()
+original_signal_handler = None
 
 
 def send_hello():
@@ -29,9 +30,11 @@ def on_message(data):
 def signal_handler(sig, frame):
     exit_event.set()
     print('exiting')
+    if callable(original_signal_handler):
+        original_signal_handler(sig, frame)
 
 
 if __name__ == '__main__':
-    signal.signal(signal.SIGINT, signal_handler)
+    original_signal_handler = signal.signal(signal.SIGINT, signal_handler)
     eio.connect('http://localhost:5000')
     eio.wait()