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dumpio2curl - Extracts dumpio output from Apache logs for debugging and replaying.


$ ./ apache.log
# Tue Sep 13 09:58:28.422218 2016 - pid 18116 - client
curl -v \
--header "User-agent:" --header "Accept:" \
--request "GET" \
--header "User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0" \
--header "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8" \
--header "Accept-Language: en-AU,en-GB;q=0.8,en;q=0.5,en-US;q=0.3" \
--header "Accept-Encoding: gzip, deflate" \
--header "DNT: 1" \
--header "Connection: keep-alive" \
--header "Upgrade-Insecure-Requests: 1" \
--header "Cache-Control: max-age=0" \

$ tail -n 200 apache.log | ./
$ tail -n 200 apache.log | ./ > replay.curl
$ bash replay.curl


This program parses output from the Apache module mod_dumpio present in Apache 2.4. Prior versions of Apache use a slightly different and incompatible line format.

If you are using a prior version of Apache I suggest looking at by Geoffrey Simmons,

Apache can be configured to output all input and/or output data. When presented in the log file the data is mixed in with other Apache logs as well as dump_io providing a lot of information about filesystem interactions.

This program extracts just the data which was sent, ignoring all other log lines.

Input log data is presented as a curl command. This is an easy to read format and allows trivial replaying of the request in a shell. The output can actually be executed as a bash script if desired.

Output data is presented as the raw data transmitted, this is easy to understand and allows quick comparison to curl output if desired. # characters are prepended which allows the output to be used as a shell script.

This program is designed to be used in a development environment with a controlled stimulus to be examined and repeated. It does not support multiple simultaneous requests. It has also not been tested on large exposed server log files.


This script does not rely on any non-core Perl modules.

The test scripts use a few convenient and commonly distributed modules.


David Tulloh <>

Copyright 2015-2017 David Tulloh

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <>.


Parses Apache 2.4 dumpio logs





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