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title date icon background tags categories intro
Mitmproxy
2020-12-22 12:10:08 -0800
icon-mitmproxy
bg-[#d86138]
capture
traffic
network
utility
Toolkit
[mitmproxy](https://mitmproxy.org/) is a free and open source interactive HTTPS proxy. This is a quick reference cheat sheet to the mitmproxy.

Getting started {.cols-3}

Usage {.col-span-2}

Option Example Description
-p mitmproxy -p 8001 Start proxy on port 8001
-m mitmproxy -p 8001 -m reverse:http://127.0.0.1:4000 Reverse proxy on port 8001 to port 4000
-w mitmproxy -p 8001 -w traffic.mitm Stream flows to file as they arrive
-r mitmproxy -r traffic.mitm Read flows from file
-C mitmproxy -C traffic.mitm Replay client requests from a saved file
-S mitmproxy -S traffic.mitm Replay server responses from a saved file
-s mitmproxy -s myScript.py Execute a script
-h mitmproxy -h mitmproxy quick help

Movement

        k                 Ctrl b
        ▲                   ▲▲
        │                   ││
h ◀ ─── + ─── ▶ l           ││ page
        │                   ││
        ▼                   ▼▼
        j             Ctrl f / Space
- -
h, j, k ,l Left, Down, Up, Right
Ctrl b Page up
Space / Ctrl f Page down
g / G Go to beginning / end
Arrows Up, Down, Left, Right
{.shortcuts}

Common Keybindings

- -
q Back / Exit
z Clear flow list
: Command prompt
E View event log
O View options
r Replay this flow
Tab Next
Enter Select
{.shortcuts}

Global Keybindings

- -
- Cycle to next layout
? View help
B Start an attached browser
C View commands
I Toggle intercept
K View key bindings
P View flow details
Q Exit immediately
W Stream to file
i Set intercept
Ctrl right Focus next layout pane
Shift tab Focus next layout pane
{.shortcuts}

Flow (View)

- -
A Resume all intercepted flows
D Duplicate flow
F Set focus follow
L Load flows from file
M Toggle viewing marked flows
S Start server replay
U Un-set all marks
V Revert changes to this flow
X Kill this flow
Z Purge all flows not showing
a Resume this intercepted flow
b Save response body to file
d Delete flow from view
e Export this flow to file
f Set view filter
m Toggle mark on this flow
n Create a new flow
o Set flow list order
r Replay this flow
v Reverse flow list order
w Save listed flows to file
` `
Ctrl l Send cuts to clipboard

{.shortcuts}

Mitmproxy Filter {.cols-3}

Filter

- -
f Set view filter (on flow view page)
{.shortcuts}

The regex are Python-style, it can be specified as quoted strings

Operators

- -
! unary not
& and
` `
(...) grouping

Expressions {.row-span-2}

- -
~a Match asset in response: CSS, Javascript, Flash, images.
~b regex Body
~bq regex Request body
~bs regex Response body
~c int HTTP response code
~d regex Domain
~dst regex Match destination address
~e Match error
~h regex Header
~hq regex Request header
~hs regex Response header
~http Match HTTP flows
~m regex Method
~marked Match marked flows
~q Match request with no response
~s Match response
~src regex Match source address
~t regex Content-type header
~tcp Match TCP flows
~tq regex Request Content-Type header
~ts regex Response Content-Type header
~u regex URL
~websocket Match WebSocket flows (and HTTP-WebSocket handshake flows)

Flow selectors

Expressions | - | - | |-------------|----------------------------| | @all | All flows | | @focus | The currently focused flow | | @shown | All flows currently shown | | @hidden | All flows currently hidden | | @marked | All marked flows | | @unmarked | All unmarked flows |

mitmproxy has a set of convenient flow selectors that operate on the current view

Examples

URL containing "google.com"

google\.com

Requests whose body contains the string "test"

~q ~b test

Anything but requests with a text/html content type:

!(~q & ~t "text/html")

Replace entire GET string in a request (quotes required to make it work):

":~q ~m GET:.*:/replacement.html"

Mitmproxy Scripts {.cols-2}

Custom response

from mitmproxy import http


def request(flow: http.HTTPFlow) -> None:
    if flow.request.pretty_url == "http://example.com/path":
        flow.response = http.HTTPResponse.make(
            200,  # (optional) status code
            b"Hello World",  # (optional) content
            {"Content-Type": "text/html"}  # (optional) headers
        )

Send a reply from the proxy without sending any data to the remote server

Add header

class AddHeader:
    def __init__(self):
        self.num = 0

    def response(self, flow):
        self.num = self.num + 1
        flow.response.headers["count"] = str(self.num)


addons = [
    AddHeader()
]

Add an HTTP header to each response

Also see