The Pappy Proxy

Documentation - Tutorial - Website - Blog

Table of Contents

• Overview
  • Introduction
  • Contributing
  • I still like Burp, but Pappy looks interesting, can I use both?
• How to Use It
  • Installation
  • Quickstart
  • Lite Mode
  • Adding The CA Cert to Your Browser
    • Firefox
    • Chrome
    • Safari
    • Internet Explorer
  • Configuration
  • General Console Techniques
    • Run a shell command
    • Running Python Code
    • Redirect Output To File
  • Generating Pappy's CA Cert
  • Browsing Recorded Requests/Responses
  • Tags
  • Request IDs
    • Passing Multiple Request IDs to a Command
  • Context
  • Filter Strings
    • List of fields
    • List of comparers
    • Special form filters
  • Scope
    • Built-In Filters
  • Decoding Strings
  • Interceptor
  • Repeater
  • Macros
    • Generating Macros From Requests
    • Request Objects
    • Useful Functions
  • Intercepting Macros
    • Enabling/Disabling Intercepting Macros
  • Macro Templates
  • Resubmitting Groups of Requests
  • Logging
  • Additional Commands and Features
    • Response streaming
  • Viewing Responses In Browser
  • Plugins
    • Should I Write a Plugin or a Macro?
  • Global Settings
  • Using an HTTP Proxy
  • Using a SOCKS Proxy
  • Transparent Host Redirection
  • Project File Encryption
  • FAQ
    • Text just appeared over my prompt! What do I do?!
    • Why does my request have an id of --?!?!
  • Boring, Technical Stuff
    • Request Cache / Memory usage
  • Changelog

Overview

Introduction

The Pappy (Proxy Attack Proxy ProxY) Proxy is an intercepting proxy for performing web application security testing. Its features are often similar, or straight up rippoffs from Burp Suite. However, Burp Suite is neither open source nor a command line tool, thus making a proxy like Pappy inevitable. The project is still in its early stages, so there are bugs and only the bare minimum features, but it can already do some cool stuff.

Contributing

I am taking any and all feature requests. If you've used Burp and had any inconvenience with it, tell me about it and I'll do everything in my power to make sure Pappy doesn't have those issues. Or even better, if you want Burp to do something that it doesn't already, let me know so that I can use it to stomp them into the dust improve my project.

If you're brave and want to try and contribute code, please let me know. Right now the codebase is kind of rough and I have refactored it a few times already, but I would be more than happy to find a stable part of the codebase that you can contribute to.

Another option is to try writing a plugin. It might be a bit easier than contributing code and plugins are extremely easy to integrate as a core feature. So you can also contribute by writing a plugin and letting me know about it. You can find out more by looking at the official plugin docs.

You can find ideas for features to add on the contributing page in the docs.

I still like Burp, but Pappy looks interesting, can I use both?

Yes! If you don't want to go completely over to Pappy yet, you can configure Burp to use Pappy as an upstream proxy server. That way, traffic will go through both Burp and Pappy and you can use whichever you want to do your testing.

How to have Burp forward traffic through Pappy:

1. Open Burp
2. Go to Options -> Connections -> Upstream Proxy Servers
3. Click Add
4. Leave Destination Host blank, but put 127.0.0.1 in Proxy Host and 8000 into Port (assuming you're using the default listener)
5. Configure your browser to use Burp as a proxy

How to Use It

Installation

Pappy supports OS X and Linux (sorry Windows). Installation requires pip or some other command that can handle a setup.py with requirements. Once the requirements are installed, you can check that it installed correctly by running pappy -l to start the proxy.

$ git clone --recursive https://github.com/roglew/pappy-proxy.git
$ cd pappy-proxy
$ pip install .

Quickstart

Pappy projects take up an entire directory. Any generated scripts, exported responses, plugin data, etc. will be placed in the current directory so it's good to give your project a directory of its own. To start a project, do something like:

$ mkdir test_project
$ cd test_project 
$ pappy
Copying default config to directory
Proxy is listening on port 8000
pappy> exit
$ ls
data.db      project_config.json
$ 

And that's it! The proxy will by default be running on port 8000 and bound to localhost (to keep the hackers out). You can modify the port/interface in config.json. You can list all your intercepted requests with ls, view a full request with vfq <reqid> or view a full response with vfs <reqid>. Right now, the only command to delete requests is filter_prune which deletes all the requests that aren't in the current context (look at the sections on the context/filter strings for more information on that).

Here's everything you need to know to get the basics done:

• This quickstart assumes you've used Burp Suite
• Make a directory for your project and cd into it in the terminal. Type pappy into the terminal and hit enter
• Commands are entered into the prompt that appears
• The proxy starts listening on port 8000 once the program starts
• Use ls to look at recent requests, ls a to look at the entire history
• You will use the number in the id column to perform actions on that request
• Use vfq <id> and vfs <id> to view full requests/responses
• Use ic to modify requests with a text editor as they go through the proxy or ic req rsp to modify both requests and responses
• Use rp <id> to send a request to the repeater. In the repeater, use <leader>f to send the current buffer (you may need to configre a leader key in vim). Use :qa! to quit the repeater.

If you want to do more, I highly suggest reading the whole readme!

Lite Mode

If you don't want to dirty up a directory, you can run Pappy in "lite" mode. Pappy will use the default configuration settings and will create a temporary data file in /tmp to use. When you quit, the file will be deleted. If you want to run Pappy in lite mode, run Pappy with either -l or --lite.

Example:

$ pappy -l
Temporary datafile is /tmp/tmpw4mGv2
Proxy is listening on port 8000
pappy> quit
Deleting temporary datafile
$ 

Adding The CA Cert to Your Browser

In order for Pappy to view data sent using HTTPS, you need to add a generated CA cert (certificate.crt) to your browser. Certificates are generated using the gencerts command and are by default stored in ~/.pappy/certs. This allows Pappy to act as a CA and sign any HTTPS certificate it wants without the browser complaining. This allows Pappy to decrypt and modify HTTPS requests. The certificate installation instructions are different for each browser.

Firefox

You can add the CA cert to Firefox by going to Preferences -> Advanced -> View Certificates -> Authorities -> Import and selecting the certificate.crt file in the certs directory.

Chrome

You can add the CA cert to Chrome by going to Settings -> Show advanced settings -> HTTPS/SSL -> Manage Certificates -> Authorities -> Import and selecting the certificate.crt file in the certs directory.

Safari

For Safari (on macs, obviously), you need to add the CA cert to your system keychain. You can do this by double clicking on the CA cert and following the prompts.

Internet Explorer

I didn't search too hard for instructions on this (since Pappy doesn't support windows) and I don't own a Windows machine to try this, so if you have trouble, I'm not the one to ask. According to Google you can double-click the cert to install it to the system, or you can do Tools -> Content -> Certificates -> Trusted Root Certificates -> Import.

Configuration

Configuration for each project is done in the config.json file. The file is a JSON-formatted dictionary that contains settings for the proxy. The following fields can be used to configure the proxy:

Key	Value
data_file	The file where requests and images will be stored
debug_dir (optional)	Where connection debug info should be stored. If not present, debug info is not saved to a file.
cert_dir	Where the CA cert and the private key for the CA cert are stored
proxy_listeners	A list of dicts which describe which ports the proxy will listen on. Each item is a dict with "port" and "interface" values which determine which port and interface to listen on. For example, if port=8000 and the interface is 127.0.0.1, the proxy will only accept connections from localhost on port 8000. To accept connections from anywhere, set the interface to 0.0.0.0.
socks_proxy	A dictionary with details on how to connect to an upstream SOCKS proxy to send all in-scope requests through. See the secion on upstream SOCKS proxies for more information.
http_proxy	A dictionary with details on how to connect to an upstream http proxy to send all in-scope requests through. See the section on upstream http proxies for more information.

The following tokens will also be replaced with values:

Token	Replaced with
{DATADIR}	The directory where Pappy's data files are stored

See the default config.json for examples.

General Console Techniques

There are a few tricks you can use in general when using Pappy's console. Most of these are provided by the cmd and cmd2.

Run a shell command

You can run a shell command with !:

pappy> ls
ID  Verb  Host         Path               S-Code            Req Len  Rsp Len  Time  Mngl
5   GET   vitaly.sexy  /netscape.gif      304 Not Modified  0        0        0.08  --
4   GET   vitaly.sexy  /esr1.jpg          304 Not Modified  0        0        0.07  --
3   GET   vitaly.sexy  /construction.gif  304 Not Modified  0        0        0.07  --
2   GET   vitaly.sexy  /vitaly2.jpg                         0        N/A      --    --
1   GET   vitaly.sexy  /                  304 Not Modified  0        0        0.07  --
pappy> !ls
cmdhistory  config.json  data.db
pappy>

Running Python Code

You can use the py command to either run python code or to drop down to a Python shell.

pappy> py print ':D '*10
:D :D :D :D :D :D :D :D :D :D
pappy> py
Python 2.7.6 (default, Jun 22 2015, 17:58:13)
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
(ProxyCmd)

        py <command>: Executes a Python command.
        py: Enters interactive Python mode.
        End with ``Ctrl-D`` (Unix) / ``Ctrl-Z`` (Windows), ``quit()``, '`exit()``.
        Non-python commands can be issued with ``cmd("your command")``.
        Run python code from external files with ``run("filename.py")``

>>> from pappyproxy import pappy
>>> pappy.session.config.config_dict
{u'data_file': u'./data.db', u'history_size': 1000, u'cert_dir': u'{DATADIR}/certs', u'proxy_listeners': [{u'interface': u'127.0.0.1', u'port': 8000}]}
>>> exit()
pappy>

Redirect Output To File

You can use > to direct output to a file. However, a number of commands use colored output. If you just redirect these to a file, there will be additional bytes which represent the ANSI color codes. To get around this, use the nocolor command to remove the color from the command output.

pappy> ls > ls.txt
pappy> !xxd -c 32 -g 4 ls.txt
0000000: 1b5b316d 1b5b346d 49442020 56657262 2020486f 73742020 20202020 20202050  .[1m.[4mID  Verb  Host         P
0000020: 61746820 20202020 20202020 20202020 2020532d 436f6465 20202020 20202020  ath               S-Code
0000040: 20202020 52657120 4c656e20 20527370 204c656e 20205469 6d652020 20204d6e      Req Len  Rsp Len  Time    Mn
0000060: 676c2020 1b5b306d 0a352020 201b5b33 366d4745 541b5b30 6d202020 1b5b3931  gl  .[0m.5   .[36mGET.[0m   .[91
0000080: 6d766974 616c792e 73657879 1b5b306d 20201b5b 33366d1b 5b306d2f 1b5b3334  mvitaly.sexy.[0m  .[36m.[0m/.[34
00000a0: 6d6e6574 73636170 652e6769 661b5b30 6d202020 2020201b 5b33356d 33303420  mnetscape.gif.[0m      .[35m304
00000c0: 4e6f7420 4d6f6469 66696564 1b5b306d 20203020 20202020 20202030 20202020  Not Modified.[0m  0        0
00000e0: 20202020 302e3038 20202020 2d2d2020 20200a34 2020201b 5b33366d 4745541b      0.08    --    .4   .[36mGET.
0000100: 5b306d20 20201b5b 39316d76 6974616c 792e7365 78791b5b 306d2020 1b5b3336  [0m   .[91mvitaly.sexy.[0m  .[36
0000120: 6d1b5b30 6d2f1b5b 33346d65 7372312e 6a70671b 5b306d20 20202020 20202020  m.[0m/.[34mesr1.jpg.[0m
0000140: 201b5b33 356d3330 34204e6f 74204d6f 64696669 65641b5b 306d2020 30202020   .[35m304 Not Modified.[0m  0
0000160: 20202020 20302020 20202020 2020302e 30372020 20202d2d 20202020 0a332020       0        0.07    --    .3
0000180: 201b5b33 366d4745 541b5b30 6d202020 1b5b3931 6d766974 616c792e 73657879   .[36mGET.[0m   .[91mvitaly.sexy
00001a0: 1b5b306d 20201b5b 33366d1b 5b306d2f 1b5b3334 6d636f6e 73747275 6374696f  .[0m  .[36m.[0m/.[34mconstructio
00001c0: 6e2e6769 661b5b30 6d20201b 5b33356d 33303420 4e6f7420 4d6f6469 66696564  n.gif.[0m  .[35m304 Not Modified
00001e0: 1b5b306d 20203020 20202020 20202030 20202020 20202020 302e3037 20202020  .[0m  0        0        0.07
0000200: 2d2d2020 20200a32 2020201b 5b33366d 4745541b 5b306d20 20201b5b 39316d76  --    .2   .[36mGET.[0m   .[91mv
0000220: 6974616c 792e7365 78791b5b 306d2020 1b5b3336 6d1b5b30 6d2f1b5b 33346d76  italy.sexy.[0m  .[36m.[0m/.[34mv
0000240: 6974616c 79322e6a 70671b5b 306d2020 20202020 201b5b33 366d3230 30204f4b  italy2.jpg.[0m       .[36m200 OK
0000260: 1b5b306d 20202020 20202020 20202020 30202020 20202020 20323033 34303033  .[0m            0        2034003
0000280: 20203135 352e3131 20202d2d 20202020 0a312020 201b5b33 366d4745 541b5b30    155.11  --    .1   .[36mGET.[0
00002a0: 6d202020 1b5b3931 6d766974 616c792e 73657879 1b5b306d 20201b5b 33366d1b  m   .[91mvitaly.sexy.[0m  .[36m.
00002c0: 5b306d2f 1b5b3334 6d1b5b30 6d202020 20202020 20202020 20202020 2020201b  [0m/.[34m.[0m                  .
00002e0: 5b33356d 33303420 4e6f7420 4d6f6469 66696564 1b5b306d 20203020 20202020  [35m304 Not Modified.[0m  0
0000300: 20202030 20202020 20202020 302e3037 20202020 2d2d2020 20200a                0        0.07    --    .
pappy> nocolor ls > ls2.txt
pappy> !xxd -c 32 -g 4 ls2.txt
0000000: 49442020 56657262 2020486f 73742020 20202020 20202050 61746820 20202020  ID  Verb  Host         Path
0000020: 20202020 20202020 2020532d 436f6465 20202020 20202020 20202020 52657120            S-Code            Req
0000040: 4c656e20 20527370 204c656e 20205469 6d652020 20204d6e 676c2020 0a352020  Len  Rsp Len  Time    Mngl  .5
0000060: 20474554 20202076 6974616c 792e7365 78792020 2f6e6574 73636170 652e6769   GET   vitaly.sexy  /netscape.gi
0000080: 66202020 20202033 3034204e 6f74204d 6f646966 69656420 20302020 20202020  f      304 Not Modified  0
00000a0: 20203020 20202020 20202030 2e303820 2020202d 2d202020 200a3420 20204745    0        0.08    --    .4   GE
00000c0: 54202020 76697461 6c792e73 65787920 202f6573 72312e6a 70672020 20202020  T   vitaly.sexy  /esr1.jpg
00000e0: 20202020 33303420 4e6f7420 4d6f6469 66696564 20203020 20202020 20202030      304 Not Modified  0        0
0000100: 20202020 20202020 302e3037 20202020 2d2d2020 20200a33 20202047 45542020          0.07    --    .3   GET
0000120: 20766974 616c792e 73657879 20202f63 6f6e7374 72756374 696f6e2e 67696620   vitaly.sexy  /construction.gif
0000140: 20333034 204e6f74 204d6f64 69666965 64202030 20202020 20202020 30202020   304 Not Modified  0        0
0000160: 20202020 20302e30 37202020 202d2d20 2020200a 32202020 47455420 20207669       0.07    --    .2   GET   vi
0000180: 74616c79 2e736578 7920202f 76697461 6c79322e 6a706720 20202020 20203230  taly.sexy  /vitaly2.jpg       20
00001a0: 30204f4b 20202020 20202020 20202020 30202020 20202020 20323033 34303033  0 OK            0        2034003
00001c0: 20203135 352e3131 20202d2d 20202020 0a312020 20474554 20202076 6974616c    155.11  --    .1   GET   vital
00001e0: 792e7365 78792020 2f202020 20202020 20202020 20202020 20202033 3034204e  y.sexy  /                  304 N
0000200: 6f74204d 6f646966 69656420 20302020 20202020 20203020 20202020 20202030  ot Modified  0        0        0
0000220: 2e303720 2020202d 2d202020 200a0a                                        .07    --    ..
pappy>

If you want to write the contents of a request or response to a file, don't use nocolor with vfq or vfs. Use just the vbq or vbs commands.

Command	Description
nocolor	Run a command and print its output without ASCII escape codes. Intended for use when redirecting output to a file. Should only be used with text and not with binary data.

Generating Pappy's CA Cert

In order to intercept and modify requests to sites that use HTTPS, you have to generate and install CA certs to your browser. You can do this by running the gencerts command in Pappy. By default, certs are stored ~/.pappy/certs. This is also the default location that Pappy will look for certificates (unless you specify otherwise in config.json.) In addition, you can give the gencerts command an argument to have it put the generated certs in a different directory.

Command	Description
gencerts [/path/to/put/certs/in]	Generate a CA cert that can be added to your browser to let Pappy decrypt HTTPS traffic. Also generates the private key for that cert in the same directory. If no path is given, the certs will be placed in the default certificate location. Overwrites any existing certs.

Browsing Recorded Requests/Responses

The following commands can be used to view requests and responses

Command	Aliases	Description
`ls [a	]`	list, ls
sm [p]	sm, site_map	Print a tree showing the site map. It will display all requests in the current context that did not have a 404 response. This has to go through all of the requests in the current context so it may be slow. If the p option is given, it will print the paths as paths rather than as a tree.
vfq <id(s)>	view_full_request, vfq, kjq	[V]iew [F]ull Re[Q]uest, prints the full request including headers and data.
vbq <id(s)>	view_request_bytes, vbq	[V]iew [B]ytes of Re[Q]uest, prints the full request including headers and data without coloring or additional newlines. Use this if you want to write a request to a file.
ppq <format> <id(s)>	pretty_print_request, ppq	Pretty print a request with a specific format. See the table below for a list of formats.
vhq <id(s)>	view_request_headers, vhq	[V]iew [H]eaders of a Re[Q]uest. Prints just the headers of a request.
vfs <id(s)>	view_full_response, vfs, kjs	[V]iew [F]ull Re[S]ponse, prints the full response associated with a request including headers and data.
vhs <id(s)>	view_response_headers, vhs	[V]iew [H]eaders of a Re[S]ponse. Prints just the headers of a response associated with a request.
vbs <id(s)>	view_response_bytes, vbs	[V]iew [B]ytes of Re[S]ponse, prints the full response including headers and data without coloring or additional newlines. Use this if you want to write a response to a file.
pps <format> <id(s)>	pretty_print_response, pps	Pretty print a response with a specific format. See the table below for a list of formats.
pprm <id(s)>	print_params, pprm	Print a summary of the parameters submitted with the request. It will include URL params, POST params, and/or cookies
pri [ct] [key(s)]	param_info, pri	Print a summary of the parameters and values submitted by in-context requests. You can pass in keys to limit which values will be shown. If you also provide ct as the first argument, it will include any keys that are passed as arguments.
watch	watch	Print requests and responses in real time as they pass through the proxy.

Available formats for ppq and pps commands:

Format	Description
form	Print POST data submitted from a form (normal post data)
json	Print as JSON

The table shown by ls will have the following columns:

Label	Description
ID	The request ID of that request. Used to identify the request for other commands.
Method	The method(/http verb) for the request
Host	The host that the request was sent to
Path	The path of the request
S-Code	The status code of the response
Req Len	The length of the data submitted
Rsp Len	The length of the data returned in the response
Time	The time in seconds it took to complete the request
Mngl	If the request or response were mangled with the interceptor. If the request was mangled, the column will show 'q'. If the response was mangled, the column will show 's'. If both were mangled, it will show 'q/s'.

Tags

You can apply tags to a request and use filters to view specific tags. The following commands can be used to apply and remove tags to requests:

Command	Aliases	Description
tag <tag> [id(s)]	tag	Apply a tag to the given requests. If no IDs are given, the tag will be applied to all in-context requests.
untag <tag> [id(s)]	untag	Remove a tag from the given ids. If no IDs are given, the tag is removed from every in-context request.
clrtag <id(s)>	clrtag	Removes all tags from the given ids.

Request IDs

Request IDs are how you identify a request and every command that involves specifying a request will take one or more request IDs. You can see it when you run ls. In addition, you can prepend an ID with prefixes to get requests or responses associated with the request (for example if you modified the request or its response with the interceptor, you can get the unmangled versions.) Here are the valid prefixes:

Prefix	Description
u	If the request was mangled, prefixing the ID with u will result in the unmangled version of the request. The resulting request will not have an associated response because it was never submitted to the server.
s	If the response was mangled, prefixing the request ID s will result in the same request but its associated response will be the unmangled version.

I know it sounds kind of unintuitive. Here are some example commands that will hopefully make things clearer. Suppose request 1 had its request mangled, and request 2 had its response mangled.

• vfq 1 Prints the mangled version of request 1
• vfq u1 Prints the unmangled version of request 1
• rp u1 Open the repeater with the unmangled version of request 1
• vfs u1 Throws an error because the unmangled version was never submitted
• vfs s1 Throws an error because the response for request 1 was never mangled
• vfs 2 Prints the mangled response of request 2
• vfs s2 Prints the unmangled response of request 2
• vfq u2 Throws an error because request 2's request was never mangled
• vfs u2 Throws an error because request 2's request was never mangled

Passing Multiple Request IDs to a Command

Some arguments can take multiple IDs for an argument. To pass multiple IDs to a command, separate the IDs with commas (no spaces!). A few examples:

• viq 1,2,u3 View information about requests 1, 2, and the unmangled version of 3
• gma foo 4,5,6 Generate a macro with definitions for requests 4, 5, and 6

In addition, you can pass in a wildcard to include all in context requests.

• viq * View information about all in-context requests
• dump_response * Dump the responses of all in-context requests (will overwrite duplicates)

Context

The context is a set of filters that define which requests are considered "active". Only requests in the current context are displayed with ls. By default, the context includes every single request that passes through the proxy. You can limit down the current context by applying filters. Filters apply rules such as "the response code must equal 500" or "the host must contain google.com". Once you apply one or more filters, only requests/responses which pass every active filter will be a part of the current context.

Command	Aliases	Description
f <filter string>	filter, fl, f	Add a filter that limits which requests are included in the current context. See the Filter String section for how to create a filter string
fc	filter_clear, fc	Clears the filters and resets the context to contain all requests and responses. Ignores scope
fu	filter_up, fu	Removes the most recently applied filter
fls	filter_list, fls	Print the filters that make up the current context
filter_prune	filter_prune	Delete all the requests that aren't in the current context from the data file

Filter Strings

Filter strings define a condition that a request/response pair must pass to be part of the context. Most filter strings have the following format:

<field> <comparer> <value>

Where <field> is some part of the request/response, <comparer> is some comparison to <value>. For example, if you wanted a filter that only matches requests to target.org, you could use the following filter string:

host is target.org

field = "host"
comparer = "is"
value = "target.org"

Also if you prefix a comparer with 'n' it turns it into a negation. Using the previous example, the following will match any request except for ones where the host contains target.org:

host nis target.org

field = "host"
comparer = "nis"
value = "target.org"

For fields that are a list of key/value pairs (headers, get params, post params, and cookies) you can use the following format:

<field> <comparer1> <value1>[ <comparer2> <value2>]

This is a little more complicated. If you don't give comparer2/value2, the filter will pass any pair where the key or the value matches comparer1 and value1. If you do give comparer2/value2, the key must match comparer1/value1 and the value must match comparer2/value2 For example:

Filter A:
    cookie contains Session

Filter B:
    cookie contains Session contains 456

Filter C:
    cookie ncontains Ultra

Cookie: SuperSession=abc123
Matches A and C but not B

Cookie: UltraSession=abc123456
Matches both A and B but not C

List of fields

Field Name	Aliases	Description	Format
all	all	The entire request represented as one string	String
host	host, domain, hs, dm	The target host (ie www.target.com)	String
path	path, pt	The path of the url (ie /path/to/secrets.php)	String
body	body, data, bd, dt	The body (data section) of either the request or the response	String
reqbody	qbody, qdata, qbd, qdt	The body (data section) of th request	String
rspbody	sbody, sdata, sbd, sdt	The body (data section) of th response	String
verb	verb, vb	The HTTP verb of the request (ie GET, POST)	String
param	param, pm	Either the get or post parameters	Key/Value
header	header, hd	An HTTP header (ie User-Agent, Basic-Authorization) in the request or response	Key/Value
reqheader	reqheader, qhd	An HTTP header in the request	Key/Value
rspheader	rspheader, shd	An HTTP header in the response	Key/Value
rawheaders	rawheaders, rh	The entire header section (as one string) of either the head or the response	String
sentcookie	sentcookie, sck	A cookie sent in a request	Key/Value
setcookie	setcookie, stck	A cookie set by a response	Key/Value
statuscode	statuscode, sc, responsecode	The response code of the response	Numeric
tag	tag	Any of the tags applied to the request	String

List of comparers

Field Name	Aliases	Description
is	is	Exact string match
contains	contains, ct	A contain B is true if B is a substring of A
containsr	containsr, ctr	A containr B is true if A matches regexp B
exists	exists, ex	A exists B if A is not an empty string (likely buggy)
Leq	Leq	A Leq B if A's length equals B (B must be a number)
Lgt	Lgt	A Lgt B if A's length is greater than B (B must be a number )
Llt	Llt	A Llt B if A's length is less than B (B must be a number)
eq	eq	A eq B if A = B (A and B must be a number)
gt	gt	A gt B if A > B (A and B must be a number)
lt	lt	A lt B if A < B (A and B must be a number)

Special form filters

A few filters don't conform to the field, comparer, value format. You can still negate these.

Format	Aliases	Description
before	before, bf, b4	Filters out any request that is not before the given request. Filters out any request without a time.
after	after, af	Filters out any request that is not before the given request. Filters out any request without a time.
inv	inf	Inverts a filter string. Anything that matches the filter string will not pass the filter.

Examples:

Only show requests before request 1234
  f b4 1234

Only show requests after request 1234
  f af 1234

Show requests without a csrf parameter
  f inv param ct csrf

Scope

Scope is a set of rules to define whether Pappy should mess with a request. You define the scope by setting the context to what you want the scope to be and running scope_save. The scope is saved in the data file and is automatically restored when using the same project directory.

Any requests which don't match all the filters in the scope will be passed straight to the browser and will not be caught by the interceptor or recorded in the data file. This is useful to make sure you don't accidentally do something like log in to your email through the proxy and have your plaintext username/password stored.

Command	Aliases	Description
scope_save	scope_save	Set the current context to be the scope
sr	scope_reset, sr	Set the current context to the scope
scope_delete	scope_delete	Clear the scope (everything's in scope!)
scope_list	scope_list, sls	List all the filters that are applied to the scope

Built-In Filters

Pappy also includes some built in filters that you can apply. These are things that you may want to filter by but may be too tedius to type out. The fbi command also supports tab completion.

Filter	Description
not_image	Matches anything that isn't an image.
not_jscss	Matches anything that isn't JavaScript or CSS.

Command	Aliases	Description
fbi <filter>	builtin_filter, fbi	Apply a built-in filter to the current context

Decoding Strings

These features try to fill a similar role to Burp's decoder. Each command will automatically copy the results to the clipboard. In addition, if no string is given, the commands will encode/decode whatever is already in the clipboard. Here is an example of how to base64 encode/decode a string.

pappy> b64e "Hello World!"
SGVsbG8gV29ybGQh
pappy> b64d
Hello World!
pappy>

And if the result contains non-printable characters, a hexdump will be produced instead

pappy> b64d ImALittleTeapot=
0000  22 60 0b 8a db 65 79 37 9a a6 8b                  "`...ey7...

pappy>

The following commands can be used to encode/decode strings:

Command	Aliases	Description
base64_decode	base64_decode, b64d	Base64 decode a string
base64_encode	base64_encode, b64e	Base64 encode a string
asciihex_decode	asciihex_decode, ahd	Decode an ASCII hex string
asciihex_encode	asciihex_encode, ahe	Encode an ASCII hex string
html_decode	html_decode, htmld	Decode an html encoded string
html_encode	html_encode, htmle	Encode a string to html encode all of the characters
url_decode	url_decode, urld	Url decode a string
url_encode	url_encode, urle	Url encode a string
gzip_decode	gzip_decode, gzd	Gzip decompress a string. Probably won't work too well since there's not a great way to get binary data passed in as an argument. I'm working on this.
gzip_encode	gzip_encode, gze	Gzip compress a string. Result doesn't get copied to the clipboard.
base64_decode_raw	base64_decode_raw, b64dr	Same as base64_decode but will not print a hexdump if it contains non-printable characters. It is suggested you use > to redirect the output to a file.
base64_encode_raw	base64_encode_raw, b64er	Same as base64_encode but will not print a hexdump if it contains non-printable characters. It is suggested you use > to redirect the output to a file.
asciihex_decode_raw	asciihex_decode_raw, ahdr	Same as asciihex_decode but will not print a hexdump if it contains non-printable characters. It is suggested you use > to redirect the output to a file.
asciihex_encode_raw	asciihex_encode_raw, aher	Same as asciihex_encode but will not print a hexdump if it contains non-printable characters. It is suggested you use > to redirect the output to a file.
html_decode_raw	html_decode_raw, htmldr	Same as html_decode but will not print a hexdump if it contains non-printable characters. It is suggested you use > to redirect the output to a file.
html_encode_raw	html_encode_raw, htmler	Same as html_encode but will not print a hexdump if it contains non-printable characters. It is suggested you use > to redirect the output to a file.
url_decode_raw	url_decode_raw, urldr	Same as url_decode but will not print a hexdump if it contains non-printable characters. It is suggested you use > to redirect the output to a file.
url_encode_raw	url_encode_raw, urler	Same as url_encode but will not print a hexdump if it contains non-printable characters. It is suggested you use > to redirect the output to a file.
gzip_decode_raw	gzip_decode_raw, gzdr	Same as gzip_decode but will not print a hexdump if it contains non-printable characters. It is suggested you use > to redirect the output to a file.
gzip_encode_raw	gzip_encode_raw, gzer	Same as gzip_encode but will not print a hexdump if it contains non-printable characters. It is suggested you use > to redirect the output to a file.
unixtime_decode	unixtime_decode, uxtd	Take in a unix timestamp and print a human readable timestamp

Interceptor

This feature is like Burp's proxy with "Intercept Mode" turned on, except it's not turned on unless you explicitly turn it on. When the proxy gets a request while in intercept mode, it lets you edit it before forwarding it to the server. In addition, it can stop responses from the server and let you edit them before they get forwarded to the browser. When you run the command, you can pass req and/or rsp as arguments to say whether you would like to intercept requests and/or responses. Only in-scope requests/responses will be intercepted (see Scope section).

The interceptor will use your EDITOR variable to decide which editor to edit the request/response with. If no editor variable is set, it will default to vi.

To forward a request, edit it, save the file, then quit.

Command	Aliases	Description
ic <req,rsp>+	intercept, ic	Begins interception mode. Press enter to leave interception mode and return to the command prompt. Pass in request to intercept requests, response to intercept responses, or both to intercept both.

Intercept both requests and responses:
> ic requests responses
> ic req rsp

Intercept just requests:
> ic requests
> ic req

Intercept just responses:
> ic responses
> ic rsp

Be totally useless:
> ic

To drop a request, delete everything, save and quit.

Repeater

This feature is like Burp's repeater (yes, really). You choose a request and Pappy will open vim in a split window with your request on the left and the original response on the right. You can make changes to the request and then run ":RepeaterSubmitBuffer" to submit the modified request. The response will be displayed on the right. This command is bound to <leader>f by default, but you can bind it to something else too in your vimrc (I think, dunno if vim will complain if the function undefined which it will be for regular files). This command will submit whatever buffer your cursor is in, so make sure it's in the request buffer.

When you're done with repeater, run ":qa!" to avoid having to save changes to nonexistent files.

Command	Aliases	Description
rp <id>	repeater, rp	Open the specified request in the repeater

Vim Command	Keybinding	Action
RepeaterSubmitBuffer	<leader>f	Submit the current buffer, split the windows vertically, and show the result in the right window

Macros

Macros are Pappy's version of Burp's intruder. You can use macros to make automated requests through the proxy and save them to the data file. A macro file is any python script file in the current directory that is in the form macro_<name>.py. An example project directory with macros would be:

$ ls -l
-rw-r--r-- 1 scaryhacker wheel     150 Nov 26 11:17 config.json
-rw------- 1 scaryhacker wheel 2639872 Nov 26 17:18 data.db
-rw-r--r-- 1 scaryhacker wheel     471 Nov 26 18:42 macro_blank.py
-rw-r--r-- 1 scaryhacker wheel     264 Nov 26 18:49 macro_hackthensa.py
-rw-r--r-- 1 scaryhacker wheel    1261 Nov 26 18:37 macro_testgen.py
-rw-r--r-- 1 scaryhacker wheel     241 Nov 26 17:18 macro_test.py

In this case we have a blank, hackthensa, testgen, and test macro. A macro script is any python script that defines a run_macro(args) function and a MACRO_NAME variable. To start with, we'll write a macro to iterate over a numbered image to try and find other images. We will take the following steps to do it:

1. Make a request to the image
2. Generate a macro using the gma command
3. Write a loop to copy the original request, modify it, then submit it with different numbers
4. Load the macro in Pappy with the lma command
5. Run the macro with the rma command

Generating Macros From Requests

You can also generate macros that have Pappy Request objects created with the same information as requests you've already made. For example:

$ pappy
Proxy is listening on port 8000
pappy> ls
ID  Verb  Host         Path               S-Code  Req Len  Rsp Len  Time  Mngl
5   GET   vitaly.sexy  /esr1.jpg          200 OK  0        17653    --    --
4   GET   vitaly.sexy  /netscape.gif      200 OK  0        1135     --    --
3   GET   vitaly.sexy  /construction.gif  200 OK  0        28366    --    --
2   GET   vitaly.sexy  /vitaly2.jpg       200 OK  0        2034003  --    --
1   GET   vitaly.sexy  /                  200 OK  0        1201     --    --
pappy> gma sexy 1
Wrote script to macro_sexy.py
pappy> quit
$ cat macro_sexy.py
from pappyproxy.http import Request, get_request, post_request

MACRO_NAME = 'Macro 94664581'
SHORT_NAME = ''

###########
## Requests

req0 = Request((
'GET / HTTP/1.1\r\n'
'Host: vitaly.sexy\r\n'
'User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:36.0) Gecko/20100101 Firefox/36.0\r\n'
'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n'
'Accept-Language: en-US,en;q=0.5\r\n'
'Accept-Encoding: gzip, deflate\r\n'
'Connection: keep-alive\r\n'
'Pragma: no-cache\r\n'
'Cache-Control: no-cache\r\n'
'\r\n'
))


def run_macro(args):
    # Example:
    # req = req0.copy() # Copy req0
    # req.submit() # Submit the request to get a response
    # print req.response.raw_headers # print the response headers
    # req.save() # save the request to the data file
    # or copy req0 into a loop and use string substitution to automate requests
    pass

If you enter in a value for SHORT_NAME, you can use it as a shortcut to run that macro. So if in a macro you set SHORT_NAME='tm' you can run it by running pappy> rma tm.

Remember, you can use the wildcard to generate a macro with all in-context requests:

# Generate a macro with all in-context requests
pappy> gma allreqs *

Passing Arguments to Macros

When you run the macro, any additional command line arguments will be passed to the run_macro function in the args argument. For example, if you run your macro using

pappy> rma foo thisis an "amazing argument"

The args argument of run_macro will be ["thisis", "an", "amazing argument"]. If no arguments are give, args will be an empty list.

Macro Commands

Command	Aliases	Description
lma [dir]	load_macros, lma	Load macros from a directory. If dir is not given, use the current directory (the project directory)
rma <macro name>	run_macro, rma	Run a macro with the given name. You can use the shortname, filename, or long name.
gma <name> [id(s)]	generate_macro, gma	Generate a macro with the given name. If request IDs are given, the macro will contain request objects that contain each request.
rpy <id(s)>	rpy	Print the Python object definitions for each of the given ids

Request Objects

The main method of interacting with the proxy is through Request objects. You can submit a request with req.sumbit() and save it to the data file with req.save(). The objects also have attributes which can be used to modify the request in a high-level way. You can see the full documentation for more details on using these objects.

Dict-like objects are represented with a custom class called a RepeatableDict. Again, look at the docs for details. For the most part, you can interact with it like a normal dictionary, but don't be surprised if it's missing some methods you would expect.

Here is a quick list of attributes that you can use with Request objects:

Attribute	Settable?	Data Type	Description
cookies	Yes	RepeatableDict	Cookies sent in the request
fragment	Yes	String	The url fragment (The text after the #)
full_path	No	String	The path including url params and the fragment
full_request	No	String	The full request including headers and data
headers	Yes	RepeatableDict	The headers of the request
host	Yes	String	The host that the request is sent to
is_ssl	Yes	Bool	Whether the request is/was sent over SSL
path	Yes	String	The document path (ie www.a.com/this/is/the/path)
port	Yes	Integer	The port the request is/was sent to
post_params	Yes	RepeatableDict	Post parameters
raw_data	Yes	String	The data part of the request
raw_headers	No	String	The text of the headers section of the request
reqid	Yes	Integer	The ID of the request. If set when save() is called, it replaces the request with the same id in the database
response	Yes	Response	The associated response for the request
rsptime	No	Datetime Delta	The time it took to complete the request. Set when submit() is called
status_line	Yes	String	The status line of the request (ie 'GET / HTTP/1.1')
time_end	Yes	Datetime	The time when the request was completed
time_start	Yes	Datetime	The time when the request was started
unmangled	Yes	Request	If the request was mangled, the unmangled version of the request
url	Yes	String	The URL of the request (ie 'https://www.google.com')
url_params	Yes	RepeatableDict	The URL parameters of the request
verb	Yes	String	The verb used for the request (ie GET, POST, PATCH, HEAD, etc). Doesn't have to be a valid verb.
version	Yes	String	The version part of the status line (ie 'HTTP/1.1')

Request methods:

Function	Description
submit()	Submit the request through the proxy. Does not save the request to the data file
save()	Save the request, its unmangled version, its associated response, and the unmangled version of the response to the database

And here is a quick list of attributes that you can use with Response objects:

Attribute	Settable?	Data Type	Description
cookies	Yes	RepeatableDict	Cookies set by the response
headers	Yes	RepeatableDict	The headers of the response
response_code	Yes	Integer	The response code of the response
response_text	Yes	String	The text associated with the response code (ie OK, NOT FOUND)
rspid	Yes	Integer	The response id of the response. If this is the same as another response in the database, calling save() on the associated request will replace that response in the database
unmangled	Yes	Response	If the response was mangled, this will refer to the unmangled version of the response. Otherwise it is None
version	Yes	String	The version part of the status line of the response (ie 'HTTP/1.1')
raw_headers	No	String	A text version of the headers of the response
status_line	Yes	String	The status line of the response
raw_data	Yes	String	The data portion of the response
full_response	No	String	The full text version of the response including headers and data

Like I said, these interfaces are prone to change and will probably crash when you use them. If you get a traceback, send me an email so I can fix it.

Useful Functions

There are also a few functions which could be useful for creating requests in macros. It's worth pointing out that request_by_id is useful for passing request objects as arguments. For example, here is a macro that lets you resubmit a request with the Google Bot user agent:

## macro_googlebot.py

from pappyproxy.http import Request, get_request, post_request, request_by_id
from pappyproxy.context import set_tag
from pappyproxy.iter import *

MACRO_NAME = 'Submit as Google'
SHORT_NAME = ''

def run_macro(args):
    req = request_by_id(args[0])
    req.headers['User-Agent'] = "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
    req.submit()
    req.save()

Function	Description
get_request(url, url_params={})	Returns a Request object that contains a GET request to the given url with the given url params
post_request(url, post_params={}, url_params={})	Returns a Request object that contains a POST request to the given url with the given url and post params
request_by_id(reqid)	Get a request object from its id.
main_context_ids()	Returns a list of the IDs that are in the current context. Use this for macros that need to act on every in-context request. For example, it can be used in a macro to resubmit a set of requests.

Intercepting Macros

Intercepting macros let you mangle requests as they pass through the proxy. Similarly to normal macros, an intercepting macro is any python script with an "int" prefix. For example, int_name.py would be a valid intercepting macro name. They are also loaded with the lma command. An intercepting macro can define two functions: mangle_request or mangle_response. Both requests only take a Request object as a parameter. mangle_request returns either a new, modified Request object to change it, or it can return the original object to not mangle it. The mange_response must return a Response (not request!) object. The request passed in to mangle_response will have an associated response with it. If you want to modify the response, copy request.response, make modifications, then return it. If you would like to pass it through untouched, just return request.response.

Note, that due to twisted funkyness, you cannot save requests from intercepting macros. Technically you can, but to do that you'll have to define async_mangle_request (or response) instead of mangle_request (or response) then use Request.async_deep_save which generates a deferred, then generate a deferred from async_mangle_requests (inline callbacks work too). If you've never used twisted before, please don't try. Twisted is hard. Plus the mangled request will be saved before it is submitted anyways.

Confusing? Here are some example intercepting macros:

## int_cloud2butt.py

import string

MACRO_NAME = 'Cloud to Butt'

def mangle_response(request):
    r = request.response.copy()
    r.raw_data = string.replace(r.raw_data, 'cloud', 'butt')
    r.raw_data = string.replace(r.raw_data, 'Cloud', 'Butt')
    return r

## int_donothing.py

import string

MACRO_NAME = 'Do Nothing'

def mangle_request(request):
    return request

def mangle_response(request):
    return request.response

## int_adminplz.py

from base64 import base64encode as b64e

MACRO_NAME = 'Admin Session'

def mangle_request(request):
    r = request.copy()
    r.headers['Authorization'] = 'Basic %s' % b64e('Admin:Password123')
    return r

In addition, you can use an init(args) function to get arguments from the command line. If no arguments are passed, args will be an empty list. Here is an example macro that does a search and replace:

## int_replace.py

MACRO_NAME = 'Find and Replace'
SHORT_NAME = ''
runargs = []

def init(args):
    global runargs
    runargs = args

def mangle_request(request):
    global runargs
    if len(runargs) < 2:
        return request
    request.body = request.body.replace(runargs[0], runargs[1])
    return request

def mangle_response(request):
    global runargs
    if len(runargs) < 2:
        return request.response
    request.response.body = request.response.body.replace(runargs[0], runargs[1])
    return request.response

You can use this macro to do any search and replace that you want. For example, if you wanted to replace "Google" with "Skynet", you can run the macro like this:

pappy> lma
Loaded "<InterceptingMacro Find and Replace (replace)>"
pappy> rim replace Google Skynet
"Find and Replace" started
pappy> 

Now every site that you visit will be a little bit more accurate.

Enabling/Disabling Intercepting Macros

You can use the following commands to start/stop intercepting macros

Command	Aliases	Description
lma [dir]	load_macros, lma	Load macros from a directory. If dir is not given, use the current directory (the project directory)
rim <macro name>	run_int_macro, rim	Run an intercepting macro. Similarly to normal macros you can use the name, short name, or file name of the macro.
sim <macro name> [args]	stop_int_macro, sim	Stop an intercepting macro. If arguments are given, they will be passed to the macro's init(args) function if it exists.
lim	list_int_macros, lsim	List all enabled/disabled intercepting macros
gima <name>	generate_int_macro, gima	Generate an intercepting macro with the given name.

Macro Templates

Pappy also includes some other templates for generating macros. They can be generated with the gtma command. You can then modify the generated macros to do what you want. For example, you could modify the resubmit macro to get a new session token before submitting each request. Using a template can save you from writing boilerplate for commonly created macros.

Examples:

# The same as gma foo 1,2,3
pappy> gtma foo macro 1,2,3
Wrote script to macro_foo.py

# Generate a macro that resubmits all in-context requests
pappy> gtma suball resubmit
Wrote script to macro_suball.py

# Generate an intercepting macro that modifies headers as they pass through the proxy
pappy> gtma headers modheader
Wrote script to int_headers.py

Command information:

Command	Aliases	Description
gtma <name> <template name> [template arguments]	generate_template_macro, gtma	Generate a macro using a template.

Available macro templates:

Name	Arguments	Description
macro	[reqids]	The template used to generate macros from request IDs.
intmacro	None	The template used to generate an intercepting macro.
modheader	None	Create an intercepting macro that modifies a header in the request or response.
resubmit	None	Create a macro that resubmits all in-context requests. Includes commented out code to maintain session state using a cookie jar.

Resubmitting Groups of Requests

You can use the submit request to resubmit requests. It is suggested that you use this command with a heavy use of filters and using the wildcard (*) to submit all in-context requests. Be careful submitting everything in context, remember, if you have to Ctl-C out you will close Pappy and lose all in-memory requests!

Command	Aliases	Description
submit reqids [-m] [-u] [-p] [-c [COOKIES [COOKIES ...]]] [-d [HEADERS [HEADERS ...]]]	submit	Submit a given set of requests. Request IDs must be passed in as the first argument. The wildcard (*) selector can be very useful. Resubmitted requests are given a resubmitted tag. See the arguments section for information on the arguments.

Useful Filters For Selecting Requests to Resubmit

• before and after to select requests in a time range. You can use the after filter on the most recent request, browse the site, then use the before filter to select a continuous browsing session.
• verb if you only want to select GET requests
• path ct logout to avoid logging out

Arguments

There are a few simple parameters you can pass to the command to modify requests. These behave like normal command parameters in the terminal. If you need something more complex (ie getting CSRF tokens, refreshing the session token, reacting to Set-Cookie headers, etc.) you should consider writing a macro and using the main_context_ids function to get in-context IDs then iterating over them and handling them however you want.

Argument	Description
-c <cookie>=<val>	Modify a cookie on each request before submitting. Can pass more than one pair to the flag to modify more than one cookie. Does not encode the cookie values in any way.
-d <header>=<val>	Modify a header on each request before submitting. Can pass more than one pair to the flag to modify more than one header.
-m	Store requests in memory instead of saving to the data file.
-u	Only submit one request per endpoint. Will count requests with the same path but different url params as different endpoints.
-p	Only submit one request per endpoint. Will count requests with the same path but different url params as the same endpoints.

Examples:

# Resubmit all in-context requests with the SESSIONID cookie set to 1234 and SESSIONSTATE set to {'admin'='true'}
pappy> submit * -c SESSIONID=1234 SESSIONSTATE=%7B%27admin%27%3A%27true%27%7D

# Resubmit all in-context requests with the User-Agent header set to "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" then store them in memory
pappy> submit * -m -h "User-Agent=Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"

# Submit requests 123, 124, and 125 with a new user agent and new session cookies and store the submitted requests in memory
pappy> submit 123,124,125 -h "User-Agent=Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" -c SESSIONID=1234 SESSIONSTATE=%7B%27admin%27%3A%27true%27%7D

Logging

You can watch in real-time what requests are going through the proxy. Verbosisty defaults to 1 which just states when connections are made/lost and some information on what is happening. If verbosity is set to 3, it includes all the data which is sent through the proxy and processed. It will print the raw response from the server, what it decodes it to, etc. Even if you don't run this command, all the information is stored in the dubug directory (the directory is cleared every start though!)

Command	Description
log [verbosity]	View the log at the given verbosity. Default verbosity is 1 which just shows connections being made/lost and some other info, verbosity 3 shows full requests/responses as they pass through and are processed by the proxy

Additional Commands and Features

This is a list of other random stuff you can do that isn't categorized under anything else. These are mostly commands that I found that I needed while doing a test and just added. They likely don't do a ton of error checking.

Command	Aliases	Description
dump_response <reqid> [filename]	dump_response	Dumps the data from the response to the given filename (useful for images, .swf, etc). If no filename is given, it uses the name given in the path.
`export <req	rsp> `	export
merge <dbfile>	merge	Add all the requests from another datafile to the current datafile

Response streaming

If you don't have any intercepting macros running, Pappy will forward data to the browser as it gets it. However, if you're trying to mangle messages/responses, Pappy will need to download the entire message first.

Viewing Responses In Browser

You can view responses in your browser by visiting http://pappy/rsp/<rspid> (NOT pappy.com) in your browser while connected to the proxy. For example, if you want to view the response to request 123, you can visit http://pappy/rsp/123 to view the response. Pappy will return a response with the same body as the original response and will not make a request to the server. The response will not have the same headers as the original response (aside from the Content-Type header). In addition, Pappy doesn't modify any URLs in the page which means your browser will still fetch external resources like images, JavaScript etc from external servers.

Plugins

Note that this section is a very quick overview of plugins. For a full description of how to write them, please see the official docs.

It is also possible to write plugins which are reusable across projects. Plugins are simply Python scripts located in ~/.pappy/plugins. Plugins are able to create new console commands and maintain state throughout a Pappy session. They can access the same API as macros, but the plugin system is designed to allow you to create general purpose commands as compared to macros which are meant to be project-specific scripts. Still, it may not be a bad idea to try building a macro to do something in a quick and dirty way before writing a plugin since plugins are more complicated to write.

A simple hello world plugin could be something like:

## hello.py
import shlex

def hello_world(line):
    if line:
        args = shlex.split(line)
        print 'Hello, %s!' % (', '.join(args))
    else:
        print "Hello, world!"

###############
## Plugin hooks

def load_cmds(cmd):
    cmd.set_cmds({
        'hello': (hello_world, None),
    })
    cmd.add_aliases([
        ('hello', 'hlo'),
        ('hello', 'ho'),
    ])

You can also create commands which support autocomplete:

import shlex

_AUTOCOMPLETE_NAMES = ['alice', 'allie', 'sarah', 'mallory', 'slagathor']

def hello_world(line):
    if line:
        args = shlex.split(line)
        print 'Hello, %s!' % (', '.join(args))
    else:
        print "Hello, world!"
        
def complete_hello_world(text, line, begidx, endidx):
    return [n for n in _AUTOCOMPLETE_NAMES if n.startswith(text)]
        
###############
## Plugin hooks

def load_cmds(cmd):
    cmd.set_cmds({
        'hello': (hello_world, complete_hello_world),
    })
    cmd.add_aliases([
        ('hello', 'hlo'),
    ])

Then when you run Pappy you can use the hello command:

$ pappy -l
Temporary datafile is /tmp/tmpBOXyJ3
Proxy is listening on port 8000
pappy> ho
Hello, world!
pappy> ho foo bar baz
Hello, foo, bar, baz!
pappy> ho foo bar "baz lihtyur"
Hello, foo, bar, baz lihtyur!
pappy>

Should I Write a Plugin or a Macro?

A lot of the time, you can get away with writing a macro. However, you may consider writing a plugin if:

• You find yourself copying one macro to multiple projects
• You want to write a general tool that can be applied to any website
• You need to maintain state during the Pappy session

My guess is that if you need one quick thing for a project, you're better off writing a macro first and seeing if you end up using it in future projects. Then if you find yourself needing it a lot, write a plugin for it. You may also consider keeping a mine.py plugin where you can write out commands that you use regularly but may not be worth creating a dedicated plugin for.

Global Settings

There are some settings that apply to Pappy as a whole and are stored in ~/.pappy/global_config.json. These settings are generally for tuning performance or modifying behavior on a system-wide level. No information about projects is put in here since it is world readable. You can technically add settings in here for plugins that you write, but if it's at all possible, please keep settings in the normal project config.

Settings included in ~/.pappy/global_config.json:

Setting	Description
cache_size	The number of requests from history that will be included in memory at any given time. Set to -1 to keep everything in memory. See the request cache section for more info.

Using an HTTP Proxy

Pappy allows you to use an upstream HTTP proxy. You can do this by adding an http_proxy value to config.json. You can use the following for anonymous access to the proxy:

    "http_proxy": {"host":"httpproxy.proxy.host", "port":5555}

To use credentials you add a username and password value to the dictionary:

    "http_proxy": {"host":"httpproxy.proxy.host", "port":5555, "username": "mario", "password":"ilovemushrooms"}

At the moment, only basic auth is supported. Anything in-scope that passes through any of the active listeners will use the proxy. Out of scope requests will not be sent through the proxy.

Using a SOCKS Proxy

Pappy allows you to use an upstream SOCKS proxy. You can do this by adding a socks_proxy value to config.json. You can use the following for anonymous access to the proxy:

    "socks_proxy": {"host":"socks.proxy.host", "port":5555}

To use credentials you add a username and password value to the dictionary:

    "socks_proxy": {"host":"socks.proxy.host", "port":5555, "username": "mario", "password":"ilovemushrooms"}

Any in-scope requests that pass through any of the active listeners will use the proxy. Out of scope requests will not be sent through the proxy.

Transparent Host Redirection

Sometimes you get a frustrating thick client that doesn’t let you mess with proxy settings to get it to go through a proxy. However, if you can redirect where it sends its traffic to localhost, you can get Pappy to take that traffic and redirect it to go where it should.

It takes root permissions to listen on low numbered ports. As a result, we’ll need to do some root stuff to listen on ports 80 and 443 and get the data to Pappy. There are two ways to get the traffic to Pappy. The first is to set up port forwarding as root to send traffic from localhost:80 to localhost:8080 and localhost:443 to localhost:8443 (since we can listen on 8080 and 8443 without root). Or you can YOLO, run Pappy as root and just have it listen on 80 and 443.

According to Google you can use the following command to forward port 80 on localhost to 8080 on Linux:

iptables -t nat -A PREROUTING -i ppp0 -p tcp --dport 80 -j REDIRECT --to-ports 8080

Then to route 443 to 8443:

iptables -t nat -A PREROUTING -i ppp0 -p tcp --dport 443 -j REDIRECT --to-ports 8443

Of course, both of these need to be run as root.

Then on mac it’s

echo "
rdr pass inet proto tcp from any to any port 80 -> 127.0.0.1 port 8080
rdr pass inet proto tcp from any to any port 443 -> 127.0.0.1 port 8443
" | sudo pfctl -ef -
Then to turn it off on mac it’s
sudo pfctl -F all -f /etc/pf.conf

Then modify the listener settings in the project’s config.json to be:

"proxy_listeners": [
        {"port": 8080, "interface": "127.0.0.1", "forward_host": "www.example.faketld"},
        {"port": 8443, "interface": "127.0.0.1", "forward_host_ssl": "www.example.faketld"},
    ]

This configuration will cause Pappy to open a port on 8080 that will accept connections normally and a port on 8443 which will accept SSL connections. The forward_host setting tells Pappy to redirect any requests sent to the port to the given host. It will also update the request’s host header. forward_host_ssl does the same thing, but it listens for SSL connections and forces the connection to use SSL.

Or if you’re going to YOLO it do the same thing then listen on port 80/443 directly. I do not suggest you do this.

"proxy_listeners": [
        {"port": 80, "interface": "127.0.0.1", "forward_host": "www.example.faketld"},
        {"port": 443, "interface": "127.0.0.1", "forward_host_ssl": "www.example.faketld"},
    ]

Pappy will automatically use this host to make the connection and forward the request to the new server.

Project File Encryption

Pappy includes some basic features for automatically compressing and encrypting your project directory with a password. However, before I go into details on how to do this, I need to make one thing clear.

Don't rely on Pappy to encrypt confidential information. Use a dedicated encryption product to encrypt your project directory instead.

Other commercial and large open source crypto projects have had a much larger number of people look at their crypto implementations and are less likely to have errors in their implementation. However, for cases where you don't need enterprise level security or if you just want your project stored in a single password-protected file instead of a directory, Pappy's got you covered.

Here is how Pappy's project encryption works:

• Open a project by running Pappy with the -c flag
• Pappy creates a crypt/ directory in the current directory and changes the working directory into it
• Do work as normal. You can use other tools in the created crypt/ directory
• When you quit Pappy, the file is compressed and encrypted with the provided password
• The project directory is deleted

Unfortunately, if Pappy hard crashes the files will not be cleaned up. However, if you start Pappy and it notices a crypt/ directory, it will attempt to use it as the project directory and create a new encrypted project file upon exiting.

Here is an of the usage:

$ pwd
/tmp/exampleproj
$ ls
$ pappy -c example.proj
Copying default config to ./config.json
Proxy is listening on port 8000
pappy> !pwd
/tmp/exampleproj/crypt

# Switch to another terminal window
/templates/ $ echo "Hello World" >  /tmp/exampleproj/crypt/hello.txt

# Back to Pappy
pappy> !cat hello.txt
Hello World
pappy> exit
Enter a password:
$ ls
example.proj

Then to work on the project again:

$ pappy -c example.proj
Enter a password:
Proxy is listening on port 8000
pappy> !ls
config.json     data.db         hello.txt
pappy>

Example of recovering after crash:

$ ls
crypt           project.archive
$ pappy -c test.proj
Proxy is listening on port 8000
pappy> exit
Enter a password:
$ ls
test.proj

FAQ

Text just appeared over my prompt! What do I do?!

Unfortunately I've been a bit lazy when it comes to printing errors to the terminal. A lot of stuff is just printed to stdout using print. This has the side effect of printing over your input. I'm very sorry and I'm trying to work on better solutions, but for now:

• Hit Ctl-L to clear the terminal. Your input will be saved.

Why does my request have an id of --?!?!

You can't do anything with a request/response until it is decoded and saved to disk. In between the time when a request is decoded and when it's saved to disk, it will have an ID of --. So just wait a little bit and it will get an ID you can use.

Boring, Technical Stuff

I do some stuff to try and keep speed and memory usage to reasonable levels. Unfortunately, things might seem slow in some areas. This is where I try and explain why those exist. Honestly, you probably don't care about this, but I'd rather have it written down and have nobody read it than just leave people in the dark.

Request Cache / Memory usage

For performance reasons, Pappy by default will not store every request in memory. The cache will store a certain number of the most recently accessed requests in memory. This means that if you go through all of history, it could be slow (for example running ls a or sm). If you have enough RAM to keep everything in memory, you can set the request cache size to -1 to just keep everything in memory. However, even if the cache size is unlimited, it still won't load a request into memory untill you access it. So if you want to load everything in memory, run ls a.

By default, Pappy will cache 2000 requests. This is kind of heavy, but it's assumed you're doing testing on a reasonably specced laptop. Personally, I live on the edge and use -1 until I run into memory issues.

Changelog

The boring part of the readme

• 0.2.12
  • Add error handling for if creating a connection fails
  • Minor bugfixes
• 0.2.11
  • Project directory compression/encryption. Thanks, onizenso!
  • Add submit command
  • Add macro templates
  • Add header replacement and resubmit in-context requests macro templates
• 0.2.10
  • Add wildcard support for requests that can take in multiple request ids
  • Update dump_response to dump multiple requests at the same time
  • More autocompleters (macro commands, field for filters)
  • Add non-async function to get in-context request IDs. Now macros can scan over all in-context stuff and do things with them.
  • Improve sessions to be used to maintain state with macros
  • Bugfixes
• 0.2.9
  • Fix bugs/clean up some code
• 0.2.8
  • Upstream HTTP proxy support
  • Usability improvements
  • Docs docs docs
  • Bugfixes, unit tests
  • Add http://pappy functionality to view responses in the browser
• 0.2.7
  • boring unit tests
  • should make future releases more stable I guess
  • Support for upstream SOCKS servers
  • print_params command
  • inv filter
  • param_info command
  • Filters by request/response only headers/body
  • Transparent host redirection
  • Some easier to type aliases for common commands
• 0.2.6
  • Fix pip being dumb
  • watch command to watch requests/responses in real time
  • Added pp[qs] form <id> to print POST data
  • Bugfixes
• 0.2.5
  • Requests sent with repeater now are given repeater tag
  • Add ppq and pps commands
  • Look at the pretty prompt
  • Bugfixes
• 0.2.4
  • Add command history saving between sessions
  • Add html encoder/decoder
  • All the bugs were fixed so I added some more for 0.2.5
• 0.2.3
  • Decoder functions
  • Add merge command
  • Bugfixes
• 0.2.2
  • COLORS
  • Performance improvements
  • Bugfixes (duh)
• 0.2.1
  • Improve memory usage
  • Tweaked plugin API
• 0.2.0
  • Lots of refactoring
  • Plugins
  • Bugfixes probably
  • Change prompt to make Pappy look more professional (but it will always be pappy time in your heart, I promise)
  • Create changelog
  • Add response streaming if no intercepting macros are active
• 0.1.1
  • Start using sane versioning system
  • Did proxy things