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.
Installation
go get github.com/jgrahamc/httpdiff
go install github.com/jgrahamc/httpdiff
Usage
Simple usage is to give it two URLs to fetch and it will diff the results. If the bodies are different they are saved to temporary files.
httpdiff http://www.google.co.uk http://www.google.com/
It's also possible to set the Host header to something other than what's in the URIs. This is sometimes useful when testing a temporary set up or when moving servers.
httpdiff -host example.com http://example.old.com/ http://example.new.com
Specific headers can be ignored with the -ignore option
httpdiff -ignore Set-Cookie,Date http://x.com http://y.com
The default HTTP method is GET but that can be changed
httpdiff -method HEAD http://example.com http://example2.com
Output example on Hacker News showing that Date changes each time
Output example on Google showing difference between HTTP and HTTPS
