This is a list of cURL commands I found myself using regularly. More examples with deeper explanation can be
found here
If you find yourself sitting behind a proxy
If you find yourself on a computer that is sitting behind a proxy:
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| curl --proxy http://proxy.example.org:4321 http://remote.example.org/
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Form submit with data url-encoded manually
Simulates a form submission by POST with application/x-www-form-urlencoded content type and data url-encoded by you.
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| curl -d "year=1905&name=You+Me" http://www.example.com/form-submit
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Form submit with data url-encoding automatically
Simulates a form submission by POST with application/x-www-form-urlencoded content type and data url-encoded by curl itself.
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| curl --data-urlencode "name=Joe Me" http://www.example.com/form-submit
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POST with JSON body
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| curl -H "Content-Type: application/json" -d "{'happy': 'yes'}" http://www.example.com/json
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Take a body from stdin
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| echo '{"text": "Hello **world**!"}' | curl -d @- https://api.github.com/markdown
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Output HTTP status only
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| curl http://www.google.com -sL -w "%{http_code}\\n" -o /dev/null
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The key flat here is -w which prints the report using a custom format. Here is a list of available custom variables:
url_effective
http_code
http_connect
time_total
time_namelookup
time_connect
time_pretransfer
time_redirect
time_starttransfer
size_download
size_upload
size_header
size_request
speed_download
speed_upload
content_type
num_connects
num_redirects
ftp_entry_path
Check status of multiple URLs
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| for i in gumtree bbc; do curl http://www.$i.com -sL -w "%{http_code} %{url_effective}\\n" -o /dev/null; done
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Outputs:
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2
| 200 http://www.gumtree.com/
200 http://www.bbc.com/
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