Merge pull request #2277 from dhruvan2006/fix/user-agent

Fix: Change user-agent headers to resolve yfinance download issues

Author: ValueRaider

yfinance/const.py

@@ -624,3 +624,21 @@ def merge_two_level_dicts(dict1, dict2):
         "highest_controversy"}
 }
 EQUITY_SCREENER_FIELDS = merge_two_level_dicts(EQUITY_SCREENER_FIELDS, COMMON_SCREENER_FIELDS)
+
+USER_AGENTS = [
+    # Chrome
+    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36",
+    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36",
+    "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36",
+
+    # Firefox
+    "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0",
+    "Mozilla/5.0 (Macintosh; Intel Mac OS X 14.7; rv:135.0) Gecko/20100101 Firefox/135.0",
+    "Mozilla/5.0 (X11; Linux i686; rv:135.0) Gecko/20100101 Firefox/135.0",
+
+    # Safari
+    "Mozilla/5.0 (Macintosh; Intel Mac OS X 14_7_4) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3 Safari/605.1.15",
+
+    # Edge
+    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36 Edg/131.0.2903.86"
+]

yfinance/data.py

@@ -1,4 +1,5 @@
 import functools
+import random
 from functools import lru_cache
 
 import requests as requests
@@ -10,6 +11,7 @@
 from . import utils, cache
 import threading
 
+from .const import USER_AGENTS
 from .exceptions import YFRateLimitError
 
 cache_maxsize = 64
@@ -59,7 +61,8 @@ class YfData(metaclass=SingletonMeta):
     Singleton means one session one cookie shared by all threads.
     """
     user_agent_headers = {
-        'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36'}
+        'User-Agent': random.choice(USER_AGENTS)
+    }
 
     def __init__(self, session=None):
         self._crumb = None