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Changes with Unit 1.20.0 08 Oct 2020
*) Change: the PHP module is now initialized before chrooting; this
enables loading all extensions from the host system.
*) Change: AVIF and APNG image formats added to the default MIME type
list.
*) Change: functional tests migrated to the pytest framework.
*) Feature: the Python module now fully supports applications that use
the ASGI 3.0 server interface.
*) Feature: the Python module now has a built-in WebSocket server
implementation for applications, compatible with the HTTP & WebSocket
ASGI Message Format 2.1 specification.
*) Feature: automatic mounting of an isolated "/tmp" file system into
chrooted application environments.
*) Feature: the $host variable contains a normalized "Host" request
value.
*) Feature: the "callable" option sets Python application callable
names.
*) Feature: compatibility with PHP 8 RC 1. Thanks to Remi Collet.
*) Feature: the "automount" option in the "isolation" object allows to
turn off the automatic mounting of language module dependencies.
*) Bugfix: "pass"-ing requests to upstreams from a route was broken; the
bug had appeared in 1.19.0. Thanks to 洪志道 (Hong Zhi Dao) for
discovering and fixing it.
*) Bugfix: the router process could crash during reconfiguration.
*) Bugfix: a memory leak occurring in the router process; the bug had
appeared in 1.18.0.
*) Bugfix: the "!" (non-empty) pattern was matched incorrectly; the bug
had appeared in 1.19.0.
*) Bugfix: fixed building on platforms without sendfile() support,
notably NetBSD; the bug had appeared in 1.16.0.
Changes with Unit 1.19.0 13 Aug 2020
*) Feature: reworked IPC between the router process and the applications
to lower latencies, increase performance, and improve scalability.
*) Feature: support for an arbitrary number of wildcards in route
matching patterns.
*) Feature: chunked transfer encoding in proxy responses.
*) Feature: basic variables support in the "pass" option.
*) Feature: compatibility with PHP 8 Beta 1. Thanks to Remi Collet.
*) Bugfix: the router process could crash while passing requests to an
application under high load.
*) Bugfix: a number of language modules failed to build on some systems;
the bug had appeared in 1.18.0.
*) Bugfix: time in error log messages from PHP applications could lag.
*) Bugfix: reconfiguration requests could hang if an application had
failed to start; the bug had appeared in 1.18.0.
*) Bugfix: memory leak during reconfiguration.
*) Bugfix: the daemon didn't start without language modules; the bug had
appeared in 1.18.0.
*) Bugfix: the router process could crash at exit.
*) Bugfix: Node.js applications could crash at exit.
*) Bugfix: the Ruby module could be linked against a wrong library
version.
Changes with Unit 1.18.0 28 May 2020
*) Feature: the "rootfs" isolation option for changing root filesystem
for an application.
*) Feature: multiple "targets" in PHP applications.
*) Feature: support for percent-encoding in the "uri" and "arguments"
matching options and in the "pass" option.
Changes with Unit 1.17.0 16 Apr 2020
*) Feature: a "return" action with optional "location" for immediate
responses and external redirection.
*) Feature: fractional weights support for upstream servers.
*) Bugfix: accidental 502 "Bad Gateway" errors might have occurred in
applications under high load.
*) Bugfix: memory leak in the router; the bug had appeared in 1.13.0.
*) Bugfix: segmentation fault might have occurred in the router process
when reaching open connections limit.
*) Bugfix: "close() failed (9: Bad file descriptor)" alerts might have
appeared in the log while processing large request bodies; the bug
had appeared in 1.16.0.
*) Bugfix: existing application processes didn't reopen the log file.
*) Bugfix: incompatibility with some Node.js applications.
*) Bugfix: broken build on DragonFly BSD; the bug had appeared in
1.16.0.
Changes with Unit 1.16.0 12 Mar 2020
*) Feature: basic load-balancing support with round-robin.
*) Feature: a "fallback" option that performs an alternative action if a
request can't be served from the "share" directory.
*) Feature: reduced memory consumption by dumping large request bodies
to disk.
*) Feature: stripping UTF-8 BOM and JavaScript-style comments from
uploaded JSON.
*) Bugfix: negative address matching in router might work improperly in
combination with non-negative patterns.
*) Bugfix: Java Spring applications failed to run; the bug had appeared
in 1.10.0.
*) Bugfix: PHP 7.4 was broken if it was built with thread safety
enabled.
*) Bugfix: compatibility issues with some Python applications.
Changes with Unit 1.15.0 06 Feb 2020
*) Change: extensions of dynamically requested PHP scripts were
restricted to ".php".
*) Feature: compatibility with Ruby 2.7.
*) Bugfix: segmentation fault might have occurred in the router process
with multiple application processes under load; the bug had appeared
in 1.14.0.
*) Bugfix: receiving request body over TLS connection might have
stalled.
Changes with Unit 1.14.0 26 Dec 2019
*) Change: the Go package import name changed to "unit.nginx.org/go".
*) Change: Go package now links to libunit instead of including library
sources.
*) Feature: ability to change user and group for isolated applications
when Unit daemon runs as an unprivileged user.
*) Feature: request routing by source and destination addresses and
ports.
*) Bugfix: memory bloat on large responses.
Changes with Unit 1.13.0 14 Nov 2019
*) Feature: basic support for HTTP reverse proxying.
*) Feature: compatibility with Python 3.8.
*) Bugfix: memory leak in Python application processes when the close
handler was used.
*) Bugfix: threads in Python applications might not work correctly.
*) Bugfix: Ruby on Rails applications might not work on Ruby 2.6.
*) Bugfix: backtraces for uncaught exceptions in Python 3 might be
logged with significant delays.
*) Bugfix: explicit setting a namespaces isolation option to false might
have enabled it.
Changes with Unit 1.12.0 03 Oct 2019
*) Feature: compatibility with PHP 7.4.
*) Bugfix: descriptors leak on process creation; the bug had appeared in
1.11.0.
*) Bugfix: TLS connection might be closed prematurely while sending
response.
*) Bugfix: segmentation fault might have occurred if an irregular file
was requested.
Changes with Unit 1.11.0 19 Sep 2019
*) Feature: basic support for serving static files.
*) Feature: isolation of application processes with Linux namespaces.
*) Feature: built-in WebSocket server implementation for Java Servlet
Containers.
*) Feature: direct addressing of API configuration options containing
slashes "/" using URI encoding (%2F).
*) Bugfix: segmentation fault might have occurred in Go applications
under high load.
*) Bugfix: WebSocket support was broken if Unit was built with some
linkers other than GNU ld (e.g. gold or LLD).
Changes with Unit 1.10.0 22 Aug 2019
*) Change: matching of cookies in routes made case sensitive.
*) Change: decreased log level of common errors when clients close
connections.
*) Change: removed the Perl module's "--include=" ./configure option.
*) Feature: built-in WebSocket server implementation for Node.js module.
*) Feature: splitting PATH_INFO from request URI in PHP module.
*) Feature: request routing by scheme (HTTP or HTTPS).
*) Feature: support for multipart requests body in Java module.
*) Feature: improved API compatibility with Node.js 11.10 or later.
*) Bugfix: reconfiguration failed if "listeners" or "applications"
objects were missing.
*) Bugfix: applying a large configuration might have failed.
Changes with Unit 1.9.0 30 May 2019
*) Feature: request routing by arguments, headers, and cookies.
*) Feature: route matching patterns allow a wildcard in the middle.
*) Feature: POST operation for appending elements to arrays in
configuration.
*) Feature: support for changing credentials using CAP_SETUID and
CAP_SETGID capabilities on Linux without running main process as
privileged user.
*) Bugfix: memory leak in the router process might have happened when a
client prematurely closed the connection.
*) Bugfix: applying a large configuration might have failed.
*) Bugfix: PUT and DELETE operations on array elements in configuration
did not work.
*) Bugfix: request schema in applications did not reflect TLS
connections.
*) Bugfix: restored compatibility with Node.js applications that use
ServerResponse._implicitHeader() function; the bug had appeared in
1.7.
*) Bugfix: various compatibility issues with Node.js applications.
Changes with Unit 1.8.0 01 Mar 2019
*) Change: now three numbers are always used for versioning: major,
minor, and patch versions.
*) Change: now QUERY_STRING is always defined even if the request does
not include the query component.
*) Feature: basic internal request routing by Host, URI, and method.
*) Feature: experimental support for Java Servlet Containers.
*) Bugfix: segmentation fault might have occurred in the router process.
*) Bugfix: various potential memory leaks.
*) Bugfix: TLS connections might have stalled.
*) Bugfix: some Perl applications might have failed to send the response
body.
*) Bugfix: some compilers with specific flags might have produced
non-functioning builds; the bug had appeared in 1.5.
*) Bugfix: Node.js package had wrong version number when installed from
sources.
Changes with Unit 1.7.1 07 Feb 2019
*) Security: a heap memory buffer overflow might have been caused in the
router process by a specially crafted request, potentially resulting
in a segmentation fault or other unspecified behavior
(CVE-2019-7401).
*) Bugfix: install of Go module failed without prior building of Unit
daemon; the bug had appeared in 1.7.
Changes with Unit 1.7 20 Dec 2018
*) Change: now rpath is set in Ruby module only if the library was not
found in default search paths; this allows to meet packaging
restrictions on some systems.
*) Bugfix: "disable_functions" and "disable_classes" PHP options set via
Control API did not work.
*) Bugfix: Promises on request data in Node.js were not triggered.
*) Bugfix: various compatibility issues with Node.js applications.
*) Bugfix: a segmentation fault occurred in Node.js module if
application tried to read request body after request.end() was
called.
*) Bugfix: a segmentation fault occurred in Node.js module if
application attempted to send header twice.
*) Bugfix: names of response header fields in Node.js module were
erroneously treated as case-sensitive.
*) Bugfix: uncatched exceptions in Node.js were not logged.
*) Bugfix: global install of Node.js module from sources was broken on
some systems; the bug had appeared in 1.6.
*) Bugfix: traceback for exceptions during initialization of Python
applications might not be logged.
*) Bugfix: PHP module build failed if PHP interpreter was built with
thread safety enabled.
Changes with Unit 1.6 15 Nov 2018
*) Change: "make install" now installs Node.js module as well if it was
configured.
*) Feature: "--local" ./configure option to install Node.js module
locally.
*) Bugfix: Node.js module might have crashed due to broken reference
counting.
*) Bugfix: asynchronous operations in Node.js might not have worked.
*) Bugfix: various compatibility issues with Node.js applications.
*) Bugfix: "freed pointer is out of pool" alerts might have appeared in
log.
*) Bugfix: module discovery did not work on 64-bit big-endian systems
like IBM/S390x.
Changes with Unit 1.5 25 Oct 2018
*) Change: the "type" of application object for Go was changed to
"external".
*) Feature: initial version of Node.js package with basic HTTP
request-response support.
*) Feature: compatibility with LibreSSL.
*) Feature: --libdir and --incdir ./configure options to install libunit
headers and static library.
*) Bugfix: connection might be closed prematurely while sending
response; the bug had appeared in 1.3.
*) Bugfix: application processes might have stopped handling requests,
producing "last message send failed: Resource temporarily
unavailable" alerts in log; the bug had appeared in 1.4.
*) Bugfix: Go applications did not work when Unit was built with musl C
library.
Changes with Unit 1.4 20 Sep 2018
*) Change: the control API maps the configuration object only at
"/config/".
*) Feature: TLS support for client connections.
*) Feature: TLS certificates storage control API.
*) Feature: Unit library (libunit) to streamline language module
integration.
*) Feature: "408 Request Timeout" responses while closing HTTP
keep-alive connections.
*) Feature: improvements in OpenBSD support. Thanks to David Carlier.
*) Bugfix: a segmentation fault might have occurred after
reconfiguration.
*) Bugfix: building on systems with non-default locale might be broken.
*) Bugfix: "header_read_timeout" might not work properly.
*) Bugfix: header fields values with non-ASCII bytes might be handled
incorrectly in Python 3 module.
Changes with Unit 1.3 13 Jul 2018
*) Change: UTF-8 characters are now allowed in request header field
values.
*) Feature: configuration of the request body size limit.
*) Feature: configuration of various HTTP connection timeouts.
*) Feature: Ruby module now automatically uses Bundler where possible.
*) Feature: http.Flusher interface in Go module.
*) Bugfix: various issues in HTTP connection errors handling.
*) Bugfix: requests with body data might be handled incorrectly in PHP
module.
*) Bugfix: individual PHP configuration options specified via control
API were reset to previous values after the first request in
application process.
Changes with Unit 1.2 07 Jun 2018
*) Feature: configuration of environment variables for application
processes.
*) Feature: customization of php.ini path.
*) Feature: setting of individual PHP configuration options.
*) Feature: configuration of execution arguments for Go applications.
*) Bugfix: keep-alive connections might hang after reconfiguration.
Changes with Unit 1.1 26 Apr 2018
*) Bugfix: Python applications that use the write() callable did not
work.
*) Bugfix: virtual environments created with Python 3.3 or above might
not have worked.
*) Bugfix: the request.Read() function in Go applications did not
produce EOF when the whole body was read.
*) Bugfix: a segmentation fault might have occurred while access log
reopening.
*) Bugfix: in parsing of IPv6 control socket addresses.
*) Bugfix: loading of application modules was broken on OpenBSD.
*) Bugfix: a segmentation fault might have occurred when there were two
modules with the same type and version; the bug had appeared in 1.0.
*) Bugfix: alerts "freed pointer points to non-freeble page" might have
appeared in log on 32-bit platforms.
Changes with Unit 1.0 12 Apr 2018
*) Change: configuration object moved into "/config/" path.
*) Feature: basic access logging.
*) Bugfix: 503 error occurred if Go application did not write response
header or body.
*) Bugfix: Ruby applications that use encoding conversions might not
have worked.
*) Bugfix: various stability issues.
Changes with Unit 0.7 22 Mar 2018
*) Feature: Ruby application module.
*) Bugfix: in discovering modules.
*) Bugfix: various race conditions on reconfiguration and during
shutting down.
*) Bugfix: tabs and trailing spaces were not allowed in header fields
values.
*) Bugfix: a segmentation fault occurred in Python module if
start_response() was called outside of WSGI callable.
*) Bugfix: a segmentation fault might have occurred in PHP module if
there was an error while initialization.
Changes with Unit 0.6 09 Feb 2018
*) Bugfix: the main process died when the "type" application option
contained version; the bug had appeared in 0.5.
Changes with Unit 0.5 08 Feb 2018
*) Change: the "workers" application option was removed, the "processes"
application option should be used instead.
*) Feature: the "processes" application option with prefork and dynamic
process management support.
*) Feature: Perl application module.
*) Bugfix: in reading client request body; the bug had appeared in 0.3.
*) Bugfix: some Python applications might not have worked due to missing
"wsgi.errors" environ variable.
*) Bugfix: HTTP chunked responses might be encoded incorrectly on 32-bit
platforms.
*) Bugfix: infinite looping in HTTP parser.
*) Bugfix: segmentation fault in router.
Changes with Unit 0.4 15 Jan 2018
*) Feature: compatibility with DragonFly BSD.
*) Feature: "configure php --lib-static" option.
*) Bugfix: HTTP request body was not passed to application; the bug had
appeared in 0.3.
*) Bugfix: HTTP large header buffers allocation and deallocation fixed;
the bug had appeared in 0.3.
*) Bugfix: some PHP applications might not have worked with relative
"root" path.
Changes with Unit 0.3 28 Dec 2017
*) Change: the Go package name changed to "nginx/unit".
*) Change: in the "limits.timeout" application option: application start
time and time in queue now are not accounted.
*) Feature: the "limits.requests" application option.
*) Feature: application request processing latency optimization.
*) Feature: HTTP keep-alive connections support.
*) Feature: the "home" Python virtual environment configuration option.
*) Feature: Python atexit hook support.
*) Feature: various Go package improvements.
*) Bugfix: various crashes fixed.
Changes with Unit 0.2 19 Oct 2017
*) Feature: configuration persistence.
*) Feature: improved handling of configuration errors.
*) Feature: application "timeout" property.
*) Bugfix: POST request for PHP were handled incorrectly.
*) Bugfix: the router exited abnormally if all listeners had been
deleted.
*) Bugfix: the router crashed under load.
*) Bugfix: memory leak in the router.
Changes with Unit 0.1 06 Sep 2017
*) First public release.
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