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View Only Headers with Curl

DZone's Guide to

View Only Headers with Curl

· Web Dev Zone
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Tips, tricks and tools for creating your own data-driven app, brought to you in partnership with Qlik.

When working with curl, it can give lots of excellent and detailed information, but sometimes it is too much! Today I'm fiddling with the caching headers on a client's application, so I'm only interested in seeing the headers and not the body of the response. Making a HEAD request changes the output I get, so I really do want to GET and then only see the headers.

Handily, when you use the -v verbose flag with curl, it sends the output to stdout as usual, but the extra information including the headers goes to stderr. This means that I can therefore view the headers only throwing away stdout completely:

curl -v -s http://awesome-site.com 1> /dev/null

(you need the -s to stop curl from "helpfully" printing progress bars as well)

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Published at DZone with permission of Lorna Mitchell, DZone MVB. See the original article here.

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