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# cURL Cheatsheet

## Overview of unique features

- Command-line tool for transferring data
- Supports a wide range of protocols (HTTP, FTP, SMTP, etc.)
- Can be used for testing APIs and web services
- Can be used for web scraping and data extraction

## Basic usage

Make a GET request

curl http://example.com

Make a POST request with data

curl -X POST -d "param1=value1&param2=value2" http://example.com

Make a request with headers

curl -H "Authorization: Bearer token" http://example.com

Save response to a file

curl -o output.txt http://example.com

## Authentication

Basic authentication

curl -u username:password http://example.com

OAuth authentication

curl -H "Authorization: Bearer token" http://example.com

## Cookies

Send cookies with a request

curl -b "cookie1=value1; cookie2=value2" http://example.com

Save cookies to a file

curl -c cookies.txt http://example.com

Load cookies from a file

curl -b cookies.txt http://example.com

## Advanced usage

Follow redirects

curl -L http://example.com

Set a custom user agent

curl -A "Mozilla/5.0" http://example.com

Set a timeout

curl --connect-timeout 10 http://example.com

Use a proxy

curl -x http://proxy.example.com:8080 http://example.com

## Resources

- [cURL documentation](https://curl.se/docs/)
- [cURL tutorial](https://curl.se/docs/httpscripting.html)
- [cURL forum](https://stackoverflow.com/questions/tagged/curl) for community support and troubleshooting.