You can install the package with the command below, depending on your os:
$ yum install ulyaoth-httpdiff
$ dnf install ulyaoth-httpdiff

httpdiff

Perform the same request against two HTTP servers and diff the results. For best results use in a terminal that supports ANSI escape sequences.

Available Packages:

Package Version
ulyaoth-httpdiff 1.0.0

Supported Operating Systems:

Operating Systems Versions
Amazon Linux latest
CentOS 6, 7
Fedora 19, 20, 21, 22, 23, 24, 25
Oracle Linux 6, 7
Red Hat 6, 7
Scientific Linux 6, 7

ulyaoth support