cURL Command Line tool

-i or –includeInclude HTTP Header Information with data
curl -i https://www.google.com
-I or –headOnly HTTP Header Information and no data
curl -I https://www.google.com
-HSend headers in request
curl -H “Accept:application/json” https://jsonplaceholder.typicode.com/posts/1
-o or –outputDownload the data into a file using -o command
Command : curl -o hello.html www.google.com
-ODownload the entier data as it is in the current folder
Command : curl -O https://jsonplaceholder.typicode.com/posts
-uAuthenticate using user id and password in curl
curl -u username:password http://demo.website.com
-LFollow url redirection example (https://google.com is redirected to https://www.google.com) but curl won’t re direct it automatically to that, to do that you have to fire -L command with that
Demo : curl https://google.com
Actual Command : curl -L https://google.com
-k or –insecureallow to connect to SSL sites without certificates, Connect HTTPS/SSL URL and ignore any SSL certificate error
-k should always be applied on https URL else the URL will not have any affect
-v or –verboseGives detailed information about the client server interaction.

curl –verbose https://jsonplaceholder.typicode.com/posts/3
–traceGives detailed information about the client server interaction in a file

curl –trace trace.txt https://jsonplaceholder.typicode.com/posts/3
curl –trace-ascii trace-ascii.txt https://jsonplaceholder.typicode.com/posts/3

FTP Upload and download using CURL

Upload Command (Uploads logo.svg in the current folder to ftp server)

curl -u username@heapwizard.com:password -T logo.svg ftp://ftp.heapwizard.com

Download Command (Downloads ftp.heapwizard.com/logo.svg to the current folder)

curl -u username@heapwizard.com:password -O ftp://ftp.heapwizard.com/logo.svg 

WINSCP like Upload and download using CURL

Rest API using CURL command

Note : Response of your URL is dependent on the server you send response to, it is not necessary that it will always send a response

Post data using CURL command using -d or –data attribute or curl

 curl -X POST -d "title=Hello&body=HelloWorld" https://jsonplaceholder.typicode.com/posts

Update data using CURL command using -X PUT method

curl -X PUT -d "title=Hello&body=World" https://jsonplaceholder.typicode.com/posts/3

Delete data using CURL command using DELETE method

 curl -X DELETE https://jsonplaceholder.typicode.com/posts/3

Post a json data to an URL using CURL

curl -X POST -H "Accept:application/json" https://jsonplaceholder.typicode.com/posts -d '{title:Hello,body:HelloBody}'

curl -X POST -H "Accept:application/json" https://reqres.in/api/users -d '{"name": "morpheus","job": "leader"}'

Use proxy to connect to URL in CURL

curl --proxy yourproxy:port http://yoururl.com

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