Curl

Multipart upload: curl http://demo.libcurl.so/lab -F "@file=dummy.txt"

Directory traversal: curl http://demo.libcurl.so/lab -F "filename=@dummy.txt;filename=@../../dummy.txt"

POST with content

// POST
curl -X POST -d "<key><value>please</value></key>" http://demo.libcurl.so/lab

curl -X POST -d "<key><value>please</value></key>" -H "Content-Type:application/xml"  http://demo.libcurl.so/lab

curl --data '<key><value>&lt;please&gt;</value></key>' -H "Content-Type:application/xml" http://demo.libcurl.so/lab

&please
curl --data '<key><value>&amp;please</value></key>' -H "Content-Type:application/xml" http://demo.libcurl.so/lab


curl -X POST --data '<key value="&quot;please"></key>' -H "Content-Type:application/xml" http://demo.libcurl.so/lab

JSON:
curl -X POST --data '{"key": "please"}' -H "Content-Type:application/json" http://demo.libcurl.so/lab

YAML
 curl -X POST --data "key: please" -H "Content-Type:application/yaml"  http://demo.libcurl.so/lab
 
 yaml binary
 curl http://demo.libcurl.so/lab -H "Content-Type:application/yaml" --data-binary @http_41
send  
 send a GET request to /lab with an authentication Basic with the username key and the password please
 curl http://demo.libcurl.so/lab -u "key:please"