sha8e/httpcap

Httpcap (Former name pcap-parser)

Capture, parse and display HTTP traffics. Python 2.7.* or Python 3.3+ required.

This module parses pcap/pcapng files, or capture traffics from device(with libpcap), then retrieves HTTP data, and display as text. Pcap files can be obtained via tcpdump, wireshark or other similar tools.

Features:

HTTP requests/responses grouped by TCP connections; the requests in one keep-alive http connection will display together.
Managed chunked and compressed HTTP requests/responses.
Managed character encoding
Format JSON content in a beautiful way.

Install

This module can be installed via pip:

pip install httpcap

THen you should have tools parse-pcap and parse-live installed

For parsing pcap file, use parse-pcap
For capturing and parsing traffic from net work device, use parse-live

Usage

Basic usage:

# Use tcpdump to capture packets:
tcpdump -wtest.pcap tcp port 80
# only output the requested URL and response status
parse-pcap test.pcap
# or use pipe
sudo tcpdump -w- tcp port 80 | parse-pcap
# parse-live need to be root. capture network device en1
# on linux/osx ifconfig to see all network devices
sudo parse-live en1
# capture traffics on all devices
sudo parse-live

Following take parse-pcap as example. parse-live works exactly same as parse-pcap, just change file name to device name.

Output level

Parse-pcap/parse-live only show urls by default. Use -v to display more: Then:

# output http req/resp headers
parse-pcap -v test.pcap
# output http req/resp headers and body which belong to text type
parse-pcap -vv test.pcap
# output http req/resp headers and body
parse-pcap -vvv test.pcap
# display and attempt to do url decoding and formatting json output
parse-pcap -vvb test.pcap

Group

Use -g to group http request/responses:

parse-pcap -g test.pcap

The result looks like:

********** [10.66.133.90:56240] -- -- --> [220.181.90.13:80] **********
GET http://s1.rr.itc.cn/w/u/0/20120611181946_24.jpg
HTTP/1.1 200 OK
GET http://s1.rr.itc.cn/p/images/imgloading.jpg
HTTP/1.1 200 OK
GET http://s1.rr.itc.cn/w/u/0/20130201103132_66.png
HTTP/1.1 200 OK
GET http://s1.rr.itc.cn/w/u/0/20120719174136_77.png
HTTP/1.1 200 OK
GET http://s1.rr.itc.cn/p/images/pic_prev_open.png
HTTP/1.1 200 OK

********** [10.66.133.90:47526] -- -- --> [220.181.90.13:80] **********
GET http://s1.rr.itc.cn/w/u/0/20130227132442_43.png
HTTP/1.1 200 OK
GET http://s1.rr.itc.cn/p/images/pic_next.png
HTTP/1.1 200 OK
GET http://s1.rr.itc.cn/p/images/pic_prev.png
HTTP/1.1 200 OK
GET http://s1.rr.itc.cn/p/images/pic_next_open.png
HTTP/1.1 200 OK

Filter

You can use the -i/-p options to specify the ip/port of source and destination and parse-pcap will only display HTTP data that meets the specified conditions:

parse-pcap -p55419 -vv test.pcap
parse-pcap -i192.168.109.91 -vv test.pcap

Use -d to specify the HTTP domain; only displays HTTP req/resp with the specified domain:

parse-pcap -dwww.baidu.com -vv test.pcap

Use -u to specify the HTTP uri pattern; only displays HTTP req/resp in which the url contains the specified url pattern:

parse-pcap -u/api/update -vv test.pcap

Encoding

Use -e to force the encoding used for the HTTP bodies:

parse-pcap -i192.168.109.91 -p80 -vv -eutf-8 test.pcap

sha8e / httpcap