BASH > curl

curl <options> url

 

-o <file>    # --output: write to file
-u user:pass # --user: Authentication
-v           # --verbose
-vv          # Even more verbose
-s           # --silent: don't show progress meter or errors
-S           # --show-error: when used with --silent (-sS), show errors but no progress meter
-i           # --include: Include the HTTP-header in the output
-I           # --head: headers only

Request

-X POST  # --request
-L       # follow link if page redirects
-F 	 # --form: HTTP POST data for multipart/form-data

Data

-d 'data'  # --data: HTTP post data, URL encoded (eg, status="Hello")
-d @file   # --data via file
-G         # --get: send -d data via get

Headers

-A <str>       # --user-agent
-b name=val    # --cookie
-b FILE        # --cookie
-H "X-Foo: y"  # --header
--compressed   # use deflate/gzip

SSL

--cacert <file>
--capath <dir>

-E, --cert <cert>  # --cert: Client cert file
--cert-type        # der/pem/eng
-k, --insecure     # for self-signed certs

Examples

Post data:

curl -d password=x http://x.com/y

 

Auth/data:

curl -u user:pass -d status="Hello" http://twitter.com/statuses/update.xml

 

multipart file upload

curl -v -include --form key1=value1 --form upload=@localfilename URL

 

multipart form: send data from text field and upload file

curl -F person=anonymous -F secret=@file.txt http://site.com/submit.cgi

 

Use Curl to Check if a remote resource is available (details: https://matthewsetter.com/check-if-file-is-available-with-curl/)

curl -o /dev/null --silent -Iw "%{http_code}" https://site.com/my.remote.tarball.gz