Added proxy support

[homedirectory]

Purpose

I wanted to use this tool in combination with Burp Suite, but there was no proxy argument for the script, so I implemented proxy support.

Goals

It is now possible to use a proxy to route each request.

Approach

Modified the main file tntfuzzer.py to parse an additional argument --proxy.

Modified CurlCommand and HttpOperation classes to take in an additional argument called proxy and use it in respective methods.

Also I was receiving a strange KeyError. Here is the error log:

Traceback (most recent call last):
  File "/app/tntfuzzer/tntfuzzer.py", line 258, in <module>
    main()
  File "/app/tntfuzzer/tntfuzzer.py", line 252, in main
    tnt.start()
  File "/app/tntfuzzer/tntfuzzer.py", line 155, in start
    response = operation.execute()
  File "/app/tntfuzzer/core/httpoperation.py", line 49, in execute
    if 'path' == parameter['in']:
KeyError: 'in'

This was happening even though the swagger.json file is fine, so I wrapped this call in a try-except block, which handles this error by simply continuing to the next iteration. This fix is present as a separate commit.

Added tests?

No tests added.