go get github.com/arbovm/pipelight
» date -clear | pipelight
Fri Mar 1 18:53:49 CET 2013
It shows the date, awesome. Let's run it again:
» date | pipelight
Fri Mar 1 18:53:54 CET 2013
It highlights the seconds of the date output because they changed since the last time the command was executed. OK, that doesn't make any sense. But what about this:
curl -Is https://github.com -c cookies.txt -b cookies.txt| pipelight -clear
HTTP/1.1 200 OK
Server: GitHub.com
Date: Fri, 01 Mar 2013 18:26:17 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Status: 200 OK
Cache-Control: private, max-age=0, must-revalidate
Strict-Transport-Security: max-age=2592000
X-Frame-Options: deny
Set-Cookie: logged_in=no; domain=.github.com; path=/; expires=Tue, 01-Mar-2033 18:26:17 GMT
Set-Cookie: _gh_sess=BAh7Bz...d25af3; path=/; expires=Sun, 01-Jan-2023 00:00:00 GMT; secure; HttpOnly
X-Runtime: 6
ETag: "61b566ab19f54e54bf0dcee24a3dac19"
Content-Length: 10925
And execute it again:
curl -Is https://github.com -c cookies.txt -b cookies.txt| pipelight
HTTP/1.1 200 OK
Server: GitHub.com
Date: Fri, 01 Mar 2013 18:26:21 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Status: 200 OK
Cache-Control: private, max-age=0, must-revalidate
Strict-Transport-Security: max-age=2592000
X-Frame-Options: deny
Set-Cookie: logged_in=no; domain=.github.com; path=/; expires=Tue, 01-Mar-2033 18:26:21 GMT
Set-Cookie: _gh_sess=BAh7Bz...d25af3; path=/; expires=Sun, 01-Jan-2023 00:00:00 GMT; secure; HttpOnly
X-Runtime: 7
ETag: "20766f7927ccf5643ba845ac381917ab"
Content-Length: 10925
Now it shows, that only X-Runtime, Date and parts of the ETag changed.
Let's try this again using Accept-Encoding: gzip to force compresssion:
curl -Is https://github.com -c cookies.txt -b cookies.txt -H'Accept-Encoding: gzip' | pipelight
HTTP/1.1 200 OK
Server: GitHub.com
Date: Fri, 01 Mar 2013 18:26:41 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Status: 200 OK
Cache-Control: private, max-age=0, must-revalidate
Strict-Transport-Security: max-age=2592000
X-Frame-Options: deny
Set-Cookie: logged_in=no; domain=.github.com; path=/; expires=Tue, 01-Mar-2033 18:26:41 GMT
Set-Cookie: _gh_sess=BAh7Bz...d25af3; path=/; expires=Sun, 01-Jan-2023 00:00:00 GMT; secure; HttpOnly
X-Runtime: 6
ETag: "de2ca9b0eba7131fdf5de1d6fcb461f4"
Content-Encoding: gzip
And it highlights the new response header Content-Encoding ( instead of sending Content-Length ).
- Add clear command
- Make way of highlighting configurable
- Find similar lines to provide a better highlighting
- Add option to hide unchanged lines