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httpry - Online in the Cloud

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httpry - HTTP logging and information retrieval tool


httpry [ -dFpq ] [ -b file ] [ -f format ] [ -i device ] [ -m methods ] [ -n count ] [ -o
file ] [ -P file ] [ -r file ] [ -t seconds] [ -u user ] [ 'expression' ]
httpry -h


httpry is a tool designed for displaying and logging HTTP traffic. It is not designed to
perform analysis itself, but instead to capture, parse and log the traffic for later
analysis. It can be run in real-time displaying the live traffic on the wire, or as a
daemon process that logs to an output file.


-b file
Write all processed HTTP packets to a binary pcap dump file. Useful for further
analysis of logged data.

-d Run the program as a daemon process. All program status output will be sent to
syslog. A pid file is created for the process in /var/run/httpry.pid by default.
Requires an output file specified with -o.

-f format
Provide a comma-delimited string specifying the parsed HTTP data to output. See
the doc/format-string file for further information regarding available options and

-F Disable all output buffering. This may be helpful when piping httpry output into
another program.

-h Display a brief description of these options.

-i device
Specify an ethernet interface for the program to listen on. If not specified, the
program will poll the system for a list of interfaces and select the first one

-l threshold
Specify a requests per second rate threshold value when running in rate statistics
mode (-s). Only hosts with a rps value greater than or equal to this number will be
displayed. Defaults to 1.

-m methods
Provide a comma-delimited string that specifies the request methods to parse. The
program defaults to parsing all of the standard RFC2616 method strings if this
option is not set. See the doc/method-string file for more information.

-n count
Parse this number of HTTP packets and then exit. Defaults to 0, which means loop

-o file
Specify an output file for writing parsed packet data.

-p Do not put the NIC in promiscuous mode on startup. Note that the NIC could already
be in that mode for another reason.

-P file
Specify a path and filename for creating the PID file in daemon mode.

-q Suppress non-critical output (startup banner, statistics, etc.).

-r file
Provide an input capture file to read from instead of performing a live capture.
This option does not require root privileges.

-s Run httpry in an HTTP request per second display mode. This periodically displays
the rate per active host and total rate at a specified interval.

-t seconds
Specify the host statistics display interval in seconds when running in rate
statistics mode (-s). Defaults to 5 seconds.

-u user
Specify an alternate user to take ownership of the process and any output files.
You will need root privileges to do this; it will switch to the new user after

Specify a bpf-style capture filter, overriding the default. Here are a few basic
examples starting with the default filter:

'tcp port 80 or 8080'
'tcp dst port 80'
'tcp dst port 80 and src host'

These filters will capture all web traffic both directions on two common ports,
capture only requests made to port 80, and capture requests to port 80 by a
particular host, respectively. See 'man tcpdump' for further information on the
syntax and available primitives.

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