fix: use AF_INET6 in ./tools/http_server.py (#3374)

cli/tests/integration_tests.rs

@@ -156,13 +156,11 @@ itest!(_018_async_catch {
   output: "018_async_catch.ts.out",
 });
 
-/* TODO(ry) Re-enable this test. It is flaky and only fails occasionally.
 itest!(_019_media_types {
   args: "run --reload 019_media_types.ts",
   output: "019_media_types.ts.out",
   http_server: true,
 });
-*/
 
 itest!(_020_json_modules {
   args: "run --reload 020_json_modules.ts",
@@ -174,13 +172,11 @@ itest!(_021_mjs_modules {
   output: "021_mjs_modules.ts.out",
 });
 
-/* TODO(ry) Re-enable this test. It is flaky and only fails occasionally.
 itest!(_022_info_flag_script {
   args: "info http://127.0.0.1:4545/cli/tests/019_media_types.ts",
   output: "022_info_flag_script.out",
   http_server: true,
 });
-*/
 
 itest!(_023_no_ext_with_headers {
   args: "run --reload 023_no_ext_with_headers",
@@ -337,21 +333,17 @@ itest!(_047_jsx {
   output: "047_jsx_test.jsx.out",
 });
 
-/* TODO(ry) Re-enable this test. It is flaky and only fails occasionally.
 itest!(_048_media_types_jsx {
   args: "run  --reload 048_media_types_jsx.ts",
   output: "048_media_types_jsx.ts.out",
   http_server: true,
 });
-*/
 
-/* TODO(ry) Re-enable this test. It is flaky and only fails occasionally.
 itest!(_049_info_flag_script_jsx {
   args: "info http://127.0.0.1:4545/cli/tests/048_media_types_jsx.ts",
   output: "049_info_flag_script_jsx.out",
   http_server: true,
 });
-*/
 
 itest!(_050_more_jsons {
   args: "run --reload 050_more_jsons.ts",
@@ -370,13 +362,11 @@ itest!(lock_check_ok {
   http_server: true,
 });
 
-/* TODO(ry) Re-enable this test. It is flaky and only fails occasionally.
 itest!(lock_check_ok2 {
   args: "run 019_media_types.ts --lock=lock_check_ok2.json",
   output: "019_media_types.ts.out",
   http_server: true,
 });
-*/
 
 itest!(lock_check_err {
   args: "run --lock=lock_check_err.json http://127.0.0.1:4545/cli/tests/003_relative_import.ts",
@@ -386,7 +376,6 @@ itest!(lock_check_err {
   http_server: true,
 });
 
-/* TODO(ry) Re-enable this test. It is flaky and only fails occasionally.
 itest!(lock_check_err2 {
   args: "run 019_media_types.ts --lock=lock_check_err2.json",
   output: "lock_check_err2.out",
@@ -394,7 +383,6 @@ itest!(lock_check_err2 {
   exit_code: 10,
   http_server: true,
 });
-*/
 
 itest!(async_error {
   exit_code: 1,

tools/http_server.py

@@ -7,6 +7,7 @@ from contextlib import contextmanager
 import os
 import SimpleHTTPServer
 import SocketServer
+import socket
 import sys
 from time import sleep
 from threading import Thread
@@ -105,6 +106,17 @@ class ContentTypeHandler(QuietSimpleHTTPRequestHandler):
 RunningServer = namedtuple("RunningServer", ["server", "thread"])
 
 
+def get_socket(port, handler):
+    SocketServer.TCPServer.allow_reuse_address = True
+    if os.name != "nt":
+        # We use AF_INET6 to avoid flaky test issue, particularly with
+        # the test 019_media_types. It's not well understood why this fixes the
+        # flaky tests, but it does appear to...
+        # See https://github.com/denoland/deno/issues/3332
+        SocketServer.TCPServer.address_family = socket.AF_INET6
+    return SocketServer.TCPServer(("", port), handler)
+
+
 def server():
     os.chdir(root_path)  # Hopefully the main thread doesn't also chdir.
     Handler = ContentTypeHandler
@@ -115,8 +127,7 @@ def server():
         ".jsx": "application/javascript",
         ".json": "application/json",
     })
-    SocketServer.TCPServer.allow_reuse_address = True
-    s = SocketServer.TCPServer(("", PORT), Handler)
+    s = get_socket(PORT, Handler)
     if not QUIET:
         print "Deno test server http://localhost:%d/" % PORT
     return RunningServer(s, start(s))
@@ -133,9 +144,7 @@ def base_redirect_server(host_port, target_port, extra_path_segment=""):
                              target_host + extra_path_segment + self.path)
             self.end_headers()
 
-    Handler = RedirectHandler
-    SocketServer.TCPServer.allow_reuse_address = True
-    s = SocketServer.TCPServer(("", host_port), Handler)
+    s = get_socket(host_port, RedirectHandler)
     if not QUIET:
         print "redirect server http://localhost:%d/ -> http://localhost:%d/" % (
             host_port, target_port)