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urllib3 v1.26.0 Release Notes

Release Date: 2020-11-10 // over 3 years ago

  • 👍 ⚠️ IMPORTANT: urllib3 v2.0 will drop support for Python 2 : Read more in the v2.0 Roadmap

    ➕ Added support for HTTPS proxies contacting HTTPS servers (Pull #1923, Pull #1806)

    🗄 Deprecated negotiating TLSv1 and TLSv1.1 by default. Users that
    🗄 still wish to use TLS earlier than 1.2 without a deprecation warning
    🔖 should opt-in explicitly by setting ssl_version=ssl.PROTOCOL_TLSv1_1 (Pull #2002)
    🗄 Starting in urllib3 v2.0: Connections that receive a DeprecationWarning will fail

    Deprecated Retry options Retry.DEFAULT_METHOD_WHITELIST, Retry.DEFAULT_REDIRECT_HEADERS_BLACKLIST
    0️⃣ and Retry(method_whitelist=...) in favor of Retry.DEFAULT_ALLOWED_METHODS,
    ✂ Retry.DEFAULT_REMOVE_HEADERS_ON_REDIRECT, and Retry(allowed_methods=...)
    🚚 (Pull #2000) Starting in urllib3 v2.0: Deprecated options will be removed

    ➕ Added default User-Agent header to every request (Pull #1750)

    ➕ Added urllib3.util.SKIP_HEADER for skipping User-Agent, Accept-Encoding,
    and Host headers from being automatically emitted with requests (Pull #2018)

    Collapse transfer-encoding: chunked request data and framing into
    the same socket.send() call (Pull #1906)

    0️⃣ Send http/1.1 ALPN identifier with every TLS handshake by default (Pull #1894)

    Properly terminate SecureTransport connections when CA verification fails (Pull #1977)

    ⚠ Don't emit an SNIMissingWarning when passing server_hostname=None
    to SecureTransport (Pull #1903)

    Disabled requesting TLSv1.2 session tickets as they weren't being used by urllib3 (Pull #1970)

    Suppress BrokenPipeError when writing request body after the server
    has closed the socket (Pull #1524)

    Wrap ssl.SSLError that can be raised from reading a socket (e.g. "bad MAC")
    into an urllib3.exceptions.SSLError (Pull #1939)