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126 lines
4.9 KiB
ReStructuredText
126 lines
4.9 KiB
ReStructuredText
.. _mitmproxy:
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.. program:: mitmproxy
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mitmproxy
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=========
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**mitmproxy** is a console tool that allows interactive examination and
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modification of HTTP traffic. It differs from mitmdump in that all flows are
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kept in memory, which means that it's intended for taking and manipulating
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small-ish samples. Use the :kbd:`?` shortcut key to view, context-sensitive
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documentation from any **mitmproxy** screen.
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Flow list
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---------
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The flow list shows an index of captured flows in chronological order.
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.. image:: screenshots/mitmproxy.png
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- **1**: A GET request, returning a 302 Redirect response.
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- **2**: A GET request, returning 16.75kb of text/html data.
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- **3**: A replayed request.
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- **4**: Intercepted flows are indicated with orange text. The user may edit
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these flows, and then accept them (using the :kbd:`a` key) to continue. In this
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case, the request has been intercepted on the way to the server.
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- **5**: A response intercepted from the server on the way to the client.
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- **6**: The event log can be toggled on and off using the :kbd:`e` shortcut key. This
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pane shows events and errors that may not result in a flow that shows up in the
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flow pane.
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- **7**: Flow count.
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- **8**: Various information on mitmproxy's state. In this case, we have an
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interception pattern set to ``.*``.
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- **9**: Bind address indicator - mitmproxy is listening on port 8080 of all
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interfaces.
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Flow view
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---------
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The **Flow View** lets you inspect and manipulate a single flow:
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.. image:: screenshots/mitmproxy-flowview.png
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- **1**: Flow summary.
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- **2**: The Request/Response tabs, showing you which part of the flow you are
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currently viewing. In the example above, we're viewing the Response. Hit :kbd:`tab`
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to switch between the Response and the Request.
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- **3**: Headers.
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- **4**: Body.
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- **5**: View Mode indicator. In this case, we're viewing the body in **hex** mode. The other
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available modes are **pretty**, which uses a number of heuristics to show you a friendly
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view of various content types, and **raw**, which shows you exactly what's there without any
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changes. You can change modes using the :kbd:`m` key.
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Grid Editor
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-----------
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Much of the data that we'd like to interact with in mitmproxy is structured.
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For instance, headers, queries and form data can all be thought of as a list of
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key/value pairs. Mitmproxy has a built-in editor that lays this type of data
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out in a grid for easy manipulation.
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At the moment, the Grid Editor is used in four parts of mitmproxy:
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- Editing request or response headers (:kbd:`e` for edit, then :kbd:`h` for headers in flow view)
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- Editing a query string (:kbd:`e` for edit, then :kbd:`q` for query in flow view)
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- Editing a URL-encoded form (:kbd:`e` for edit, then :kbd:`f` for form in flow view)
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- Editing replacement patterns (:kbd:`O` for options, then :kbd:`R` for Replacement Patterns)
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If there is is no data, an empty editor will be started to let you add some.
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Here is the editor showing the headers from a request:
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.. image:: screenshots/mitmproxy-kveditor.png
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To edit, navigate to the key or value you want to modify using the arrow or vi
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navigation keys, and press enter. The background color will change to show that
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you are in edit mode for the specified field:
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.. image:: screenshots/mitmproxy-kveditor-editmode.png
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Modify the field as desired, then press escape to exit edit mode when you're
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done. You can also add a row (:kbd:`a` key), delete a row (:kbd:`d` key), spawn an
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external editor on a field (:kbd:`e` key). Be sure to consult the context-sensitive
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help (:kbd:`?` key) for more.
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Example: Interception
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---------------------
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**mitmproxy**'s interception functionality lets you pause an HTTP request or
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response, inspect and modify it, and then accept it to send it on to the server
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or client.
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1: Set an interception pattern
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.. image:: screenshots/mitmproxy-intercept-filt.png
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We press :kbd:`i` to set an interception pattern. In this case, the ``~q`` filter
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pattern tells **mitmproxy** to intercept all requests. For complete filter
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syntax, see the :ref:`filters` section of the documentation,
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or the built-in help function in **mitmproxy**.
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2: Intercepted connections are indicated with orange text:
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.. image:: screenshots/mitmproxy-intercept-mid.png
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3: You can now view and modify the request:
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.. image:: screenshots/mitmproxy-intercept-options.png
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In this case, we viewed the request by selecting it, pressed :kbd:`e` for "edit"
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and :kbd:`m` for "method" to change the HTTP request method.
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4: Accept the intercept to continue:
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.. image:: screenshots/mitmproxy-intercept-result.png
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Finally, we press :kbd:`a` to accept the modified request, which is then sent on to
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the server. In this case, we changed the request from an HTTP GET to
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OPTIONS, and Google's server has responded with a 405 "Method not allowed".
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