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cURL Knowledgebase

cURL

cURL is by far the most popular HTTP client in the world. It's a command-line tool and library for transferring data with URLs, supporting a wide range of protocols including HTTP, HTTPS, FTP, and more.

While cURL itself is rarely used directly in web scraping, it serves as the foundation for many HTTP clients and libraries across different programming languages through libcurl library. This makes it a crucial component in many web scraping stacks.

cURL is a very feature rich HTTP client offering implementations of HTTP/1.1, HTTP/2, and HTTP/3 protocols, as well as support for various authentication methods, cookies, and more. It's only matched by HTTP clients within real web browsers like Chrome, Firefox, and Safari.

See below for more on cURL in the context of web scraping and data programming 👇

How To Use Proxy With cURL?

Proxies are essential to avoid IP address blocking and accessing restricted web pages over a specific location. Learn how to proxies with cURL.

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#proxies

What is The cURL (28) Error, Couldn't connect to server?

The cURL (28) indicates a proxy connection error. This error arises when the cURL request can't connect to the proxy server.

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#proxies

How to Solve the cURL (60) Error When Using Proxy?

The cURL (60) error is a common error encountered when using proxies with cURL. Learn what is the exact cause of this error and how to solve it.

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#proxies

How to Use cURL Config Files?

cURL can be configured using config.txt files which can definite each cURL option. Then, the "-K" option can be used to provide your config.

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How to Set cURL Authentication - Full Examples Guide

Learn how to set basic authentication, bearer tokens, and cookie authentication with cURL through a step-by-step guide.

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How to Follow Redirects In cURL?

Redirects are caused by HTTP pages moving to a different location. They can be handled automatically or explicitly - here's how to do it in cURL.

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How to Set User Agent With cURL?

The User-Agent header is one of the essential headers which identifies the request sender's device. Learn how to set User-Agent with cURL.

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How To Send cURL POST Requests?

POST type requests send data to the web server which is popular http method for web interactions like search. Here's how to POST in cURL.

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