feat: Learned --cert and --key fields to support HTTPS for Safari. See docs.

Create a local certificate using mkcert, and then
  simwrapper serve --key [keyfilename.pem] --cert [certfile.pem]

will start the local server using HTTPS. Your browser will not
recognize the key unless you import the certificate files from mkcert first.

This is useful for Safari, which does not support http://localhost

Using mkcert:  three commands get you going.
-------------
brew install mkcert nss   # install mkcert and nss from homebrew
mkcert localhost          # create PEM certificate for "localhost"
mkcert -install           # installs certificate in browser cert database

Author: billyc

simwrapper/MiniFileServer.py

@@ -4,11 +4,12 @@
 import re
 import sys
 import socket
+import ssl
 
 try:
     # Python3
     import http.server as SimpleHTTPServer
-    from http.server import SimpleHTTPRequestHandler, test
+    from http.server import HTTPServer, SimpleHTTPRequestHandler, test
 
 except ImportError:
     # Python 2
@@ -135,16 +136,26 @@ def find_free_port(port):
         finally:
             s.close()
 
-def run_mini_file_server(port):
+def run_mini_file_server(port, cert, key):
     print("\n-----------------------------------------------------------------")
     print("SimWrapper file server: port", port)
+    if cert and key: print("Using HTTPS with PEM cert/key")
     print(current_dir)
 
     free_port = find_free_port(port)
 
     print("-----------------------------------------------------------------\n")
-    test(HandlerClass=RangeRequestHandler, port=free_port)
+    # test(HandlerClass=RangeRequestHandler, port=free_port)
+    httpd = HTTPServer(('localhost', free_port), RangeRequestHandler)
 
+    if cert and key: httpd.socket = ssl.wrap_socket(
+        httpd.socket,
+        certfile=cert,
+        keyfile=key,
+        server_side=True
+    )
+
+    httpd.serve_forever()
 
 if __name__ == '__main__':
     run_mini_file_server(8000)

simwrapper/cli.py

@@ -16,12 +16,22 @@ def cli():
 
 @cli.command(help="Start a local file server in this folder")
 @click.argument('port', default=default_port)
-def serve(port):
-    MiniFileServer.run_mini_file_server(port)
+@click.option('--cert', default=None, help="PEM Certificate filename. Provide both a certificate and key to serve HTTPS")
+@click.option('--key', default=None, help="PEM Key filename. Provide both a certificate and key to serve HTTPS")
+def serve(port, cert, key):
+    if (cert and not key) or (not cert and key):
+      raise click.BadParameter("need both a cert and a key to enable HTTPS")
+
+    MiniFileServer.run_mini_file_server(port, cert, key)
 
 @cli.command(help="Open your browser and view this folder using SimWrapper")
 @click.argument('site', default='vsp')
-def open(site):
+@click.option('--cert', default=None, help="PEM Certificate filename. Provide both a certificate and key to serve HTTPS")
+@click.option('--key', default=None, help="PEM Key filename. Provide both a certificate and key to serve HTTPS")
+def open(site, cert, key):
+    if (cert and not key) or (not cert and key):
+      raise click.BadParameter("need both a cert and a key to enable HTTPS")
+
     port = MiniFileServer.find_free_port(default_port)
     # Build the full URL for this site, including the free port number
     url = ''
@@ -35,4 +45,4 @@ def open(site):
     webbrowser.open(url, new=2, autoraise=True)  # in a new tab
 
     # Then start local fileserver
-    MiniFileServer.run_mini_file_server(port)
+    MiniFileServer.run_mini_file_server(port, cert, key)