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curl

What Where
Official Page https://curl.se/
Source https://github.com/curl/curl
Download https://github.com/curl/curl/releases
Docs https://everything.curl.dev or https://curl.se/docs/manpage.html
Book https://curl.se/docs/
Windows scoop install curl
Ubuntu apt install curl

Random Examples

Example to check /24 range in abuseipdb.com for the last 3 days

curl -s -G https://api.abuseipdb.com/api/v2/check-block --data-urlencode "network=123.123.123.1/24" -d maxAgeInDays=$DAYS -H "Key: apikeyfromabuseipdb.com" -H "Accept: application/json" |jq '.data.reportedAddress'

If you want to inspect the headers of a response from some endpoint include the -I flag and curl will return just the headers.

curl -I localhost:3000/posts

Example of using curl with basic auth credentials

curl -u username:password staging.example.com

Query a website e.g. request a json response from cloudflare-dns.com on TXT records of the domain 0xfab1.net

curl -s -H 'accept: application/dns-json' 'https://cloudflare-dns.com/dns-query?name=0xfab1.net&type=TXT'

Send Mail

curl --ssl-reqd --url 'smtps://smtp.gmail.com:465' --user 'username@gmail.com:password' --mail-from 'username@gmail.com' --mail-rcpt 'john@example.com' --upload-file mail.txt

mail.txt file contents:

From: "User Name" <username@gmail.com>
To: "John Smith" <john@example.com>
Subject: This is a test

Hi John,
I’m sending this mail with curl thru my gmail account.
Bye!

Some more information:

WebDAV

Create Folders

curl -X MKCOL 'http://your.server/uploads/nested_folder1' --user 'name:pwd'

Copy Files

curl -T <filename> -u <username>:<password> <url> -o /dev/stdout

Copy all files in a Folder (and subfolder). Folders must already exist.

cd local_folder_to_upload && find . -exec curl -T {} 'http://your.server/uploads/{}' --user 'name:pwd' \;
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