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View Only Headers with Curl

DZone's Guide to

View Only Headers with Curl

· Web Dev Zone ·
Free Resource

Learn how error monitoring with Sentry closes the gap between the product team and your customers. With Sentry, you can focus on what you do best: building and scaling software that makes your users’ lives better.

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)

What’s the best way to boost the efficiency of your product team and ship with confidence? Check out this ebook to learn how Sentry's real-time error monitoring helps developers stay in their workflow to fix bugs before the user even knows there’s a problem.

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