What’s new in Tornado 6.1.0¶
Oct 30, 2020¶
This is the last release of Tornado to support Python 3.5. Future versions will require Python 3.6 or newer.
Windows support has been improved. Tornado is now compatible with the proactor event loop (which became the default in Python 3.8) by automatically falling back to running a selector in a second thread. This means that it is no longer necessary to explicitly configure a selector event loop, although doing so may improve performance. This does not change the fact that Tornado is significantly less scalable on Windows than on other platforms.
Binary wheels are now provided for Windows, MacOS, and Linux (amd64 and arm64).
coroutinenow has better support for the Python 3.7+
contextvarsmodule. In particular, the
ContextVar.resetmethod is now supported.
HEADrequests to handlers that used chunked encoding no longer produce malformed output.
Certain kinds of malformed
gzipdata no longer cause an infinite loop.
decompress_response=Falsenow works correctly with
Mixing requests with and without proxies works correctly in
curl_httpclient(assuming the version of pycurl is recent enough).
Tornado/$VERSIONis now used if the
user_agentparameter is not specified.
After a 303 redirect,
GET. Previously this would use
GETif the original request was a
POSTand would otherwise reuse the original request method. For
curl_httpclient, the behavior depends on the version of
libcurl(with the most recent versions using
GETafter 303 regardless of the original method).
connect_timeoutto zero is now supported to disable the timeout.
Header parsing is now faster.
parse_body_argumentsnow accepts incompletely-escaped non-ASCII inputs.
ssl.CertificateErrorduring the SSL handshake is now handled correctly.
Reads that are resolved while the stream is closing are now handled correctly.
When colored logging is enabled,
logging.CRITICALmessages are now recognized and colored magenta.
EADDRNOTAVAILis now ignored when binding to
localhostwith IPv6. This error is common in docker.
AnyThreadEventLoopPolicynow also configures a selector event loop for these threads (the proactor event loop only works on the main thread)
set_close_execfunction has been removed.
RedirectHandler.getnow accepts keyword arguments.
When sending 304 responses, more headers (including
Allow) are now preserved.
reverse_urlcorrectly handles escaped characters in the regex route.
Etagheaders are now generated with SHA-512 instead of MD5.