2023 .

How To Use Curl – A Comprehensive Guide

Written by Ben Javu May 18, 2023 · 3 min read
How To Use Curl – A Comprehensive Guide

Table of Contents

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Introduction

CURL is a command-line tool that allows you to transfer data to and from servers. It is widely used by developers and system administrators to automate tasks such as testing APIs, downloading files, and sending data to servers. In this article, we will cover the basics of using CURL and some advanced features that can help you get the most out of this powerful tool.

What is CURL?

CURL stands for Client URL, and it is a command-line tool used for transferring data to and from servers. It supports various protocols, including HTTP, HTTPS, FTP, FTPS, SCP, SFTP, TFTP, LDAP, LDAPS, DICT, FILE, and IMAP. CURL is available for multiple platforms, including Windows, Linux, and macOS.

How to Install CURL?

CURL is usually pre-installed on most Linux and macOS systems, but you may need to install it manually on Windows. To install CURL on Windows, follow these steps: 1. Download the latest CURL version from the official website. 2. Extract the downloaded file to a folder of your choice. 3. Add the CURL executable file's path to your system's PATH environment variable.

Basic CURL Commands

How to Make a GET Request?

To make a GET request using CURL, use the following command: ``` curl http://example.com ``` This command will send a GET request to the specified URL and display the response on the console.

How to Make a POST Request?

To make a POST request using CURL, use the following command: ``` curl -X POST -d "param1=value1¶m2=value2" http://example.com ``` This command will send a POST request to the specified URL with the specified parameters and display the response on the console.

Advanced CURL Features

How to Use HTTP Headers?

To use HTTP headers in CURL requests, use the following command: ``` curl -H "Header-Name: Header-Value" http://example.com ``` This command will send an HTTP header with the specified name and value in the CURL request.

How to Use Basic Authentication?

To use basic authentication in CURL requests, use the following command: ``` curl --user username:password http://example.com ``` This command will send the specified username and password in the CURL request's header for basic authentication.

Conclusion

CURL is a powerful tool that can help you automate tasks and test APIs. In this article, we covered the basics of using CURL and some advanced features that can help you get the most out of this tool. We hope this guide has been helpful, and you can now use CURL effectively in your projects.

What is the Difference between CURL and Wget?

CURL and Wget are both command-line tools used for transferring data to and from servers. The main difference between the two is that CURL supports more protocols and features than Wget. CURL supports HTTP, HTTPS, FTP, FTPS, SCP, SFTP, TFTP, LDAP, LDAPS, DICT, FILE, and IMAP, while Wget only supports HTTP, HTTPS, and FTP protocols.

How to Download a File using CURL?

To download a file using CURL, use the following command: ``` curl -O http://example.com/file.txt ``` This command will download the file from the specified URL and save it to the current directory with the same name.

How to Follow Redirects using CURL?

To follow redirects in CURL requests, use the following command: ``` curl -L http://example.com ``` This command will follow the redirects in the CURL request and display the final response on the console.
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