0d3a153c78
When using a modern curl we can download download multiple urls in parallel which avoids connection setup overhead and is generally more efficient. Use when it's detected. TODO: ensure both old and new curl are tested automatically via the testsuite.
77 lines
2.4 KiB
Python
77 lines
2.4 KiB
Python
#!/usr/bin/python3
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"""
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network related utilities
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"""
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import contextlib
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import http.server
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import socket
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import threading
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try:
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from http.server import ThreadingHTTPServer
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except ImportError:
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# This fallback is only needed on py3.6. Py3.7+ has ThreadingHTTPServer.
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# We just import ThreadingHTTPServer here so that the import of "net.py"
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# on py36 works, the helpers are not usable because the "directory" arg
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# for SimpleHTTPRequestHandler is also not supported.
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class ThreadingHTTPServer: # type: ignore
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def __init__(self, *args, **kwargs): # pylint: disable=unused-argument
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# pylint: disable=import-outside-toplevel
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import pytest # type: ignore
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pytest.skip("python too old to suport ThreadingHTTPServer")
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from .atomic import AtomicCounter
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def _get_free_port():
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.bind(("localhost", 0))
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return s.getsockname()[1]
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class SilentHTTPRequestHandler(http.server.SimpleHTTPRequestHandler):
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def log_message(self, *args, **kwargs):
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pass
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def do_GET(self):
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# silence errors when the other side "hangs up" unexpectedly
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# (our tests will do that when downloading in parallel)
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try:
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super().do_GET()
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except (ConnectionResetError, BrokenPipeError):
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pass
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class DirHTTPServer(ThreadingHTTPServer):
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def __init__(self, *args, directory=None, simulate_failures=0, **kwargs):
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super().__init__(*args, **kwargs)
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self.directory = directory
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self.simulate_failures = AtomicCounter(simulate_failures)
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self.reqs = AtomicCounter()
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def finish_request(self, request, client_address):
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self.reqs.inc()
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if self.simulate_failures.count > 0:
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self.simulate_failures.dec()
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SilentHTTPRequestHandler(
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request, client_address, self, directory="does-not-exists")
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return
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SilentHTTPRequestHandler(
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request, client_address, self, directory=self.directory)
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@contextlib.contextmanager
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def http_serve_directory(rootdir, simulate_failures=0):
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port = _get_free_port()
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httpd = DirHTTPServer(
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("localhost", port),
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http.server.SimpleHTTPRequestHandler,
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directory=rootdir,
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simulate_failures=simulate_failures,
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)
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threading.Thread(target=httpd.serve_forever).start()
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try:
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yield httpd
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finally:
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httpd.shutdown()
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