gh-91219: Add an index_pages default list and parameter to SimpleHTTPRequestHandler (GH-31985)

* Add an index_pages default list to SimpleHTTPRequestHandler and an
optional constructor parameter that allows the default indexes pages
list to be overridden.  This makes it easy to set a new index page name
without having to override send_head.

Author: myronww

Lib/http/server.py

@@ -642,6 +642,7 @@ class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):
 
     """
 
+    index_pages = ["index.html", "index.htm"]
     server_version = "SimpleHTTP/" + __version__
     extensions_map = _encodings_map_default = {
         '.gz': 'application/gzip',
@@ -650,9 +651,11 @@ class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):
         '.xz': 'application/x-xz',
     }
 
-    def __init__(self, *args, directory=None, **kwargs):
+    def __init__(self, *args, directory=None, index_pages=None, **kwargs):
         if directory is None:
             directory = os.getcwd()
+        if index_pages is not None:
+            self.index_pages = index_pages
         self.directory = os.fspath(directory)
         super().__init__(*args, **kwargs)
 
@@ -696,7 +699,7 @@ def send_head(self):
                 self.send_header("Content-Length", "0")
                 self.end_headers()
                 return None
-            for index in "index.html", "index.htm":
+            for index in self.index_pages:
                 index = os.path.join(path, index)
                 if os.path.exists(index):
                     path = index

Misc/NEWS.d/next/Library/2022-03-19-04-41-42.bpo-47063.nwRfUo.rst

@@ -0,0 +1 @@
+Add an index_pages parameter to support using non-default index page names.