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21 February 2017: mitmproxy 2.0
* HTTP/2 is now enabled by default.
* Image ContentView: Parse images with Kaitai Struct ( instead of Pillow.
This simplifies installation, reduces binary size, and allows parsing in pure Python.
* Web: Add missing flow filters.
* Add transparent proxy support for OpenBSD.
* Check the mitmproxy CA for expiration and warn the user to regenerate it if necessary.
* Testing: Tremendous improvements, enforced 100% coverage for large parts of the
codebase, increased overall coverage.
* Enforce individual coverage: one source file -> one test file with 100% coverage.
* A myriad of other small improvements throughout the project.
* Numerous bugfixes.
26 December 2016: mitmproxy 1.0
* All mitmproxy tools are now Python 3 only! We plan to support Python 3.5 and higher.
* Web-Based User Interface: Mitmproxy now offically has a web-based user interface
called mitmweb. We consider it stable for all features currently exposed
in the UI, but it still misses a lot of mitmproxy’s options.
* Windows Compatibility: With mitmweb, mitmproxy is now useable on Windows.
We are also introducing an installer (kindly sponsored by BitRock) that
simplifies setup.
* Configuration: The config file format is now a single YAML file. In most cases,
converting to the new format should be trivial - please see the docs for
more information.
* Console: Significant UI improvements - including sorting of flows by
size, type and url, status bar improvements, much faster indentation for
HTTP views, and more.
* HTTP/2: Significant improvements, but is temporarily disabled by default
due to wide-spread protocol implementation errors on some large website
* WebSocket: The protocol implementation is now mature, and is enabled by
default. Complete UI support is coming in the next release. Hooks for
message interception and manipulation are available.
* A myriad of other small improvements throughout the project.
16 October 2016: mitmproxy 0.18
* Python 3 Compatibility for mitmproxy and pathod (Shadab Zafar, GSoC 2016)
* Major improvements to mitmweb (Clemens Brunner & Jason Hao, GSoC 2016)
* Internal Core Refactor: Separation of most features into isolated Addons
* Initial Support for WebSockets
* Improved HTTP/2 Support
* Reverse Proxy Mode now automatically adjusts host headers and TLS Server Name Indication
* Improved HAR export
* Improved export functionality for curl, python code, raw http etc.
* Flow URLs are now truncated in the console for better visibility
* New filters for TCP, HTTP and marked flows.
* Mitmproxy now handles comma-separated Cookie headers
* Merge mitmproxy and pathod documentation
* Mitmdump now sanitizes its console output to not include control characters
* Improved message body handling for HTTP messages:
.raw_content provides the message body as seen on the wire
.content provides the decompressed body (e.g. un-gzipped)
.text provides the body decompressed and decoded body
* New HTTP Message getters/setters for cookies and form contents.
* Add ability to view only marked flows in mitmproxy
* Improved Script Reloader (Always use polling, watch for whole directory)
* Use tox for testing
* Unicode support for tnetstrings
* Add dumpfile converters for mitmproxy versions 0.11 and 0.12
* Numerous bugfixes
9 April 2016: mitmproxy 0.17
* Simplify repository and release structure. mitmproxy now comes as a single package, including netlib and pathod.
* Rename the Python package from libmproxy to mitmproxy.
* New option to add server certs to client chain (CVE-2016-2402, John Kozyrakis)
* Enable HTTP/2 by default (Thomas Kriechbaumer)
* Improved HAR extractor (Shadab Zafar)
* Add icon for OSX and Windows binaries
* Add content view for query parameters (Will Coster)
* Initial work on Python 3 compatibility
* export (Zohar Lorberbaum)
* Fix XSS vulnerability in HTTP errors (Will Coster)
* Numerous bugfixes and minor improvements
15 February 2016: mitmproxy 0.16
* Completely revised HTTP2 implementation based on hyper-h2 (Thomas Kriechbaumer)
* Export flows as cURL command, Python code or raw HTTP (Shadab Zafar)
* Fixed compatibility with the Android Emulator (Will Coster)
* Script Reloader: Inline scripts are reloaded automatically if modified (Matthew Shao)
* Inline script hooks for TCP mode (Michael J. Bazzinotti)
* Add default ciphers to support iOS9 App Transport Security (Jorge Villacorta)
* Basic Authentication for mitmweb (Guillem Anguera)
* Exempt connections from interception based on TLS Server Name Indication (David Weinstein)
* Provide Python Wheels for faster installation
* Numerous bugfixes and minor improvements
4 December 2015: mitmproxy 0.15
* Support for loading and converting older dumpfile formats (0.13 and up)
* Content views for inline script (@chrisczub)
* Better handling of empty header values (Benjamin Lee/@bltb)
* Fix a gnarly memory leak in mitmdump
* A number of bugfixes and small improvements
6 November 2015: mitmproxy 0.14
* Statistics: 399 commits, 13 contributors, 79 closed issues, 37 closed
PRs, 103 days
* Docs: Greatly updated docs now hosted on ReadTheDocs!
* Docs: Fixed Typos, updated URLs etc. (Nick Badger, Ben Lerner, Choongwoo
Han, onlywade, Jurriaan Bremer)
* mitmdump: Colorized TTY output
* mitmdump: Use mitmproxy's content views for human-readable output (Chris
* mitmproxy and mitmdump: Support for displaying UTF8 contents
* mitmproxy: add command line switch to disable mouse interaction (Timothy
* mitmproxy: bug fixes (Choongwoo Han, sethp-jive, FreeArtMan)
* mitmweb: bug fixes (Colin Bendell)
* libmproxy: Add ability to fall back to TCP passthrough for non-HTTP
* libmproxy: Avoid double-connect in case of TLS Server Name Indication.
This yields a massive speedup for TLS handshakes.
* libmproxy: Prevent unneccessary upstream connections (macmantrl)
* Inline Scripts: New API for HTTP Headers:
* Inline Scripts: Properly handle exceptions in `done` hook
* Inline Scripts: Allow relative imports, provide `__file__`
* Examples: Add probabilistic TLS passthrough as an inline script
* netlib: Refactored HTTP protocol handling code
* netlib: ALPN support
* netlib: fixed a bug in the optional certificate verification.
* netlib: Initial Python 3.5 support (this is the first prerequisite for
3.x support in mitmproxy)
24 July 2015: mitmproxy 0.13
* Upstream certificate validation. See the --verify-upstream-cert,
--upstream-trusted-cadir and --upstream-trusted-ca parameters. Thanks to
Kyle Morton ( for his work on this.
* Add HTTP transparent proxy mode. This uses the host headers from HTTP
traffic (rather than SNI and IP address information from the OS) to
implement perform transparent proxying. Thanks to for
this feature.
* Add ~src and ~dst REGEX filters, allowing matching on source and
destination addresses in the form of <IP>:<Port>
* mitmproxy console: change g/G keyboard shortcuts to match less. Thanks to
Jose Luis Honorato (
* mitmproxy console: Flow marking and unmarking. Marked flows are not
deleted when the flow list is cleared. Thanks to Jake Drahos
* mitmproxy console: add marking of flows
* Remove the certforward feature. It was added to allow exploitation of
#gotofail, which is no longer a common vulnerability. Permitting this
hugely increased the complexity of packaging and distributing mitmproxy.
3 June 2015: mitmproxy 0.12.1
* mitmproxy console: mouse interaction - scroll in the flow list, click on
flow to view, click to switch between tabs.
* Update our crypto defaults: SHA256, 2048 bit RSA, 4096 bit DH parameters.
* BUGFIX: crash under some circumstances when copying to clipboard.
* BUGFIX: occasional crash when deleting flows.
18 May 2015: mitmproxy 0.12
* mitmproxy console: Significant revamp of the UI. The major changes are
listed below, and in addition almost every aspect of the UI has
been tweaked, and performance has improved significantly.
* mitmproxy console: A new options screen has been created ("o" shortcut),
and many options that were previously manipulated directly via a
keybinding have been moved there.
* mitmproxy console: Big improvement in palettes. This includes improvements
to all colour schemes. Palettes now set the terminal background colour by
default, and a new --palette-transparent option has been added to disable
* mitmproxy console: g/G shortcuts throughout mitmproxy console to jump
to the beginning/end of the current view.
* mitmproxy console: switch palettes on the fly from the options screen.
* mitmproxy console: A cookie editor has been added for mitmproxy console
at long last.
* mitmproxy console: Various components of requests and responses can be
copied to the clipboard from mitmproxy - thanks to @marceloglezer.
* Support for creating new requests from scratch in mitmproxy console (@marceloglezer).
* SSLKEYLOGFILE environment variable to specify a logging location for TLS
master keys. This can be used with tools like Wireshark to allow TLS
* Server facing SSL cipher suite specification (thanks to Jim Shaver).
* Official support for transparent proxying on FreeBSD - thanks to Mike C
* Many other small bugfixes and improvemenets throughout the project.
29 Dec 2014: mitmproxy 0.11.2:
* Configuration files - mitmproxy.conf, mitmdump.conf, common.conf in the
.mitmproxy directory.
* Better handling of servers that reject connections that are not SNI.
* Many other small bugfixes and improvements.
15 November 2014: mitmproxy 0.11.1:
* Bug fixes: connection leaks some crashes
7 November 2014: mitmproxy 0.11:
* Performance improvements for mitmproxy console
* SOCKS5 proxy mode allows mitmproxy to act as a SOCKS5 proxy server
* Data streaming for response bodies exceeding a threshold
* Ignore hosts or IP addresses, forwarding both HTTP and HTTPS traffic
* Finer-grained control of traffic replay, including options to ignore
contents or parameters when matching flows (
* Pass arguments to inline scripts
* Configurable size limit on HTTP request and response bodies
* Per-domain specification of interception certificates and keys (see
--cert option)
* Certificate forwarding, relaying upstream SSL certificates verbatim (see
* Search and highlighting for HTTP request and response bodies in
mitmproxy console (
* Transparent proxy support on Windows
* Improved error messages and logging
* Support for FreeBSD in transparent mode, using pf (
* Content view mode for WBXML (
* Better documentation, with a new section on proxy modes
* Generic TCP proxy mode
* Countless bugfixes and other small improvements
* pathod: Hugely improved SSL support, including dynamic generation of certificates
using the mitproxy cacert
7 November 2014: pathod 0.11:
* Hugely improved SSL support, including dynamic generation of certificates
using the mitproxy cacert
* pathoc -S dumps information on the remote SSL certificate chain
* Big improvements to fuzzing, including random spec selection and memoization to avoid repeating randomly generated patterns
* Reflected patterns, allowing you to embed a pathod server response specification in a pathoc request, resolving both on client side. This makes fuzzing proxies and other intermediate systems much better.
28 January 2014: mitmproxy 0.10:
* Support for multiple scripts and multiple script arguments
* Easy certificate install through the in-proxy web app, which is now
enabled by default
* Forward proxy mode, that forwards proxy requests to an upstream HTTP server
* Reverse proxy now works with SSL
* Search within a request/response using the "/" and "n" shortcut keys
* A view that beatifies CSS files if cssutils is available
* Bug fix, documentation improvements, and more.
25 August 2013: mitmproxy 0.9.2:
* Improvements to the helper script for OSX.
* Don't take minor version into account when checking for serialized file
* Fix a bug causing resource exhaustion under some circumstances for SSL
* Revamp the way we store interception certificates. We used to store these
on disk, they're now in-memory. This fixes a race condition related to
cert handling, and improves compatibility with Windows, where the rules
governing permitted file names are weird, resulting in errors for some
valid IDNA-encoded names.
* Display transfer rates for responses in the flow list.
* Many other small bugfixes and improvements.
25 August 2013: pathod 0.9.2:
* Adapt to interface changes in netlib
16 June 2013: mitmproxy 0.9.1:
* Use "correct" case for Content-Type headers added by mitmproxy.
* Make UTF environment detection more robust.
* Improved MIME-type detection for viewers.
* Always read files in binary mode (Windows compatibility fix).
* Some developer documentation.
15 May 2013: mitmproxy 0.9:
* Upstream certs mode is now the default.
* Add a WSGI container that lets you host in-proxy web applications.
* Full transparent proxy support for Linux and OSX.
* Introduce netlib, a common codebase for mitmproxy and pathod
* Full support for SNI.
* Color palettes for mitmproxy, tailored for light and dark terminal
* Stream flows to file as responses arrive with the "W" shortcut in
* Extend the filter language, including ~d domain match operator, ~a to
match asset flows (js, images, css).
* Follow mode in mitmproxy ("F" shortcut) to "tail" flows as they arrive.
* --dummy-certs option to specify and preserve the dummy certificate
* Server replay from the current captured buffer.
* Huge improvements in content views. We now have viewers for AMF, HTML,
JSON, Javascript, images, XML, URL-encoded forms, as well as hexadecimal
and raw views.
* Add Set Headers, analagous to replacement hooks. Defines headers that are set
on flows, based on a matching pattern.
* A graphical editor for path components in mitmproxy.
* A small set of standard user-agent strings, which can be used easily in
the header editor.
* Proxy authentication to limit access to mitmproxy
* pathod: Proxy mode. You can now configure clients to use pathod as an
HTTP/S proxy.
* pathoc: Proxy support, including using CONNECT to tunnel directly to
* pathoc: client certificate support.
* pathod: API improvements, bugfixes.
15 May 2013: pathod 0.9 (version synced with mitmproxy):
* Pathod proxy mode. You can now configure clients to use pathod as an
HTTP/S proxy.
* Pathoc proxy support, including using CONNECT to tunnel directly to
* Pathoc client certificate support.
* API improvements, bugfixes.
16 November 2012: pathod 0.3:
A release focusing on shoring up our fuzzing capabilities, especially with
* pathoc -q and -r options, output full request and response text.
* pathod -q and -r options, add full request and response text to pathod's
log buffer.
* pathoc and pathod -x option, makes -q and -r options log in hex dump
* pathoc -C option, specify response codes to ignore.
* pathoc -T option, instructs pathoc to ignore timeouts.
* pathoc -o option, a one-shot mode that exits after the first non-ignored
* pathoc and pathod -e option, which explains the resulting message by
expanding random and generated portions, and logging a reproducible
* Streamline the specification langauge. HTTP response message is now
specified using the "r" mnemonic.
* Add a "u" mnemonic for specifying User-Agent strings. Add a set of
standard user-agent strings accessible through shortcuts.
* Major internal refactoring and cleanup.
* Many bugfixes.
22 August 2012: pathod 0.2:
* Add pathoc, a pathological HTTP client.
* Add libpathod.test, a truss for using pathod in unit tests.
* Add an injection operator to the specification language.
* Allow Python escape sequences in value literals.
* Allow execution of requests and responses from file, using the new + operator.
* Add daemonization to Pathod, and make it more robust for public-facing use.
* Let pathod pick an arbitrary open port if -p 0 is specified.
* Move from Tornado to netlib, the network library written for mitmproxy.
* Move the web application to Flask.
* Massively expand the documentation.
5 April 2012: mitmproxy 0.8:
* Detailed tutorial for Android interception. Some features that land in
this release have finally made reliable Android interception possible.
* Upstream-cert mode, which uses information from the upstream server to
generate interception certificates.
* Replacement patterns that let you easily do global replacements in flows
matching filter patterns. Can be specified on the command-line, or edited
* Much more sophisticated and usable pretty printing of request bodies.
Support for auto-indentation of Javascript, inspection of image EXIF
data, and more.
* Details view for flows, showing connection and SSL cert information (X
keyboard shortcut).
* Server certificates are now stored and serialized in saved traffic for
later analysis. This means that the 0.8 serialization format is NOT
compatible with 0.7.
* Many other improvements, including bugfixes, and expanded scripting API,
and more sophisticated certificate handling.
20 February 2012: mitmproxy 0.7:
* New built-in key/value editor. This lets you interactively edit URL query
strings, headers and URL-encoded form data.
* Extend script API to allow duplication and replay of flows.
* API for easy manipulation of URL-encoded forms and query strings.
* Add "D" shortcut in mitmproxy to duplicate a flow.
* Reverse proxy mode. In this mode mitmproxy acts as an HTTP server,
forwarding all traffic to a specified upstream server.
* UI improvements - use unicode characters to make GUI more compact,
improve spacing and layout throughout.
* Add support for filtering by HTTP method.
* Add the ability to specify an HTTP body size limit.
* Move to typed netstrings for serialization format - this makes 0.7
backwards-incompatible with serialized data from 0.6!
* Significant improvements in speed and responsiveness of UI.
* Many minor bugfixes and improvements.
7 August 2011: mitmproxy 0.6:
* New scripting API that allows much more flexible and fine-grained
rewriting of traffic. See the docs for more info.
* Support for gzip and deflate content encodings. A new "z"
keybinding in mitmproxy to let us quickly encode and decode content, plus
automatic decoding for the "pretty" view mode.
* An event log, viewable with the "v" shortcut in mitmproxy, and the
"-e" command-line flag in mitmdump.
* Huge performance improvements: mitmproxy interface, loading
large numbers of flows from file.
* A new "replace" convenience method for all flow objects, that does a
universal regex-based string replacement.
* Header management has been rewritten to maintain both case and order.
* Improved stability for SSL interception.
* Default expiry time on generated SSL certs has been dropped to avoid an
OpenSSL overflow bug that caused certificates to expire in the distant
past on some systems.
* A "pretty" view mode for JSON and form submission data.
* Expanded documentation and examples.
* Countless other small improvements and bugfixes.
27 June 2011: mitmproxy 0.5:
* An -n option to start the tools without binding to a proxy port.
* Allow scripts, hooks, sticky cookies etc. to run on flows loaded from
save files.
* Regularize command-line options for mitmproxy and mitmdump.
* Add an "SSL exception" to mitmproxy's license to remove possible
distribution issues.
* Add a --cert-wait-time option to make mitmproxy pause after a new SSL
certificate is generated. This can pave over small discrepancies in
system time between the client and server.
* Handle viewing big request and response bodies more elegantly. Only
render the first 100k of large documents, and try to avoid running the
XML indenter on non-XML data.
* BUGFIX: Make the "revert" keyboard shortcut in mitmproxy work after a
flow has been replayed.
* BUGFIX: Repair a problem that sometimes caused SSL connections to consume
100% of CPU.
30 March 2011: mitmproxy 0.4
* Full serialization of HTTP conversations
* Client and server replay
* On-the-fly generation of dummy SSL certificates
* mitmdump has "grown up" into a powerful tcpdump-like tool for HTTP/S
* Dozens of improvements to the mitmproxy console interface
* Python scripting hooks for programmatic modification of traffic
1 March 2010: mitmproxy 0.2
* Big speed and responsiveness improvements, thanks to Thomas Roth
* Support urwid 0.9.9
* Terminal beeping based on filter expressions
* Filter expressions for terminal beeps, limits, interceptions and sticky
cookies can now be passed on the command line.
* Save requests and responses to file
* Split off non-interactive dump functionality into a new tool called
* "A" will now accept all intercepted connections
* Lots of bugfixes