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53 lines
3.2 KiB
HTML
53 lines
3.2 KiB
HTML
As discussed in [the Flow View section of the mitmproxy
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overview](@!urlTo("mitmproxy.html")!@), mitmproxy allows you to inspect and
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manipulate flows. When inspecting a single flow, mitmproxy uses a number of
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heuristics to show a friendly view of various content types; if mitmproxy
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cannot show a friendly view, mitmproxy defaults to a __raw__ view.
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Each content type invokes a different flow viewer to parse the data and display
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the friendly view. Users can add custom content viewers by adding a view class
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to contentview.py, discussed below.
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## Adding a new View class to contentview.py
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The content viewers used by mitmproxy to present a friendly view of various
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content types are stored in contentview.py. Reviewing this file shows a number
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of classes named ViewSomeDataType, each with the properties: __name__,
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__prompt__, and __content\_types__ and a function named __\_\_call\_\___.
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Adding a new content viewer to parse a data type is as simple as writing a new
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View class. Your new content viewer View class should have the same properties
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as the other View classes: __name__, __prompt__, and __content\_types__ and a
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__\_\_call\_\___ function to parse the content of the request/response.
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* The __name__ property should be a string describing the contents and new content viewer;
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* The __prompt__ property should be a two item tuple:
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- __1__: A string that will be used to display the new content viewer's type; and
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- __2__: A one character string that will be the hotkey used to select the new content viewer from the Flow View screen;
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* The __content\_types__ property should be a list of strings of HTTP Content\-Types that the new content viewer can parse.
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* Note that mitmproxy will use the content\_types to try and heuristically show a friendly view of content and that you can override the built-in views by populating content\_types with values for content\_types that are already parsed -- e.g. "image/png".
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After defining the __name__, __prompt__, and __content\_types__ properties of
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the class, you should write the __\_\_call\_\___ function, which will parse the
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request/response data and provide a friendly view of the data. The
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__\_\_call\_\___ function should take the following arguments: __self__,
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__hdrs__, __content__, __limit__; __hdrs__ is a ODictCaseless object containing
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the headers of the request/response; __content__ is the content of the
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request/response, and __limit__ is an integer representing the amount of data
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to display in the view window.
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The __\_\_call\_\___ function returns two values: (1) a string describing the
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parsed data; and (2) the parsed data for friendly display. The parsed data to
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be displayed should be a list of strings formatted for display. You can use
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the __\_view\_text__ function in contentview.py to format text for display.
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Alternatively, you can display content as a series of key-value pairs; to do
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so, prepare a list of lists, where each list item is a two item list -- a key
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that describes the data, and then the data itself; after preparing the list of
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lists, use the __common.format\_keyvals__ function on it to prepare it as text
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for display.
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If the new content viewer fails or throws an exception, mitmproxy will default
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to a __raw__ view.
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