[dingus] Trying to get a web dingus working with pyodide

dingus/srvit.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+import os
+
+from http.server import test, SimpleHTTPRequestHandler, ThreadingHTTPServer
+
+
+class MyHTTPRequestHandler(SimpleHTTPRequestHandler):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.extensions_map[".js"] = "application/javascript"
+        self.extensions_map[".wasm"] = "application/wasm"
+
+    def end_headers(self):
+        self.send_my_headers()
+        super().end_headers()
+
+    def send_my_headers(self):
+        if "pyodide" not in self.path:
+            self.send_header("Cache-Control", "no-cache, no-store, must-revalidate")
+            self.send_header("Pragma", "no-cache")
+            self.send_header("Expires", "0")
+
+        self.send_header("Cross-Origin-Opener-Policy", "same-origin")
+        self.send_header("Cross-Origin-Embedder-Policy", "require-corp")
+
+
+if __name__ == "__main__":
+    import argparse
+    import contextlib
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "-b",
+        "--bind",
+        metavar="ADDRESS",
+        help="bind to this address " "(default: all interfaces)",
+    )
+    parser.add_argument(
+        "-d",
+        "--directory",
+        default=os.getcwd(),
+        help="serve this directory " "(default: current directory)",
+    )
+    parser.add_argument(
+        "-p",
+        "--protocol",
+        metavar="VERSION",
+        default="HTTP/1.0",
+        help="conform to this HTTP version " "(default: %(default)s)",
+    )
+    parser.add_argument(
+        "port",
+        default=8000,
+        type=int,
+        nargs="?",
+        help="bind to this port " "(default: %(default)s)",
+    )
+    args = parser.parse_args()
+    handler_class = MyHTTPRequestHandler
+
+    # ensure dual-stack is not disabled; ref #38907
+    class DualStackServer(ThreadingHTTPServer):
+
+        def server_bind(self):
+            # suppress exception when protocol is IPv4
+            with contextlib.suppress(Exception):
+                self.socket.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 0)
+            return super().server_bind()
+
+        def finish_request(self, request, client_address):
+            self.RequestHandlerClass(request, client_address, self, directory=args.directory)
+
+    test(
+        HandlerClass=handler_class,
+        ServerClass=DualStackServer,
+        port=args.port,
+        bind=args.bind,
+        protocol=args.protocol,
+    )