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cURL Knowledgebase

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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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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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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How to Send a HEAD Request With cURL?

The HEAD HTTP method is used to gather information and metadata about a specific resource. Learn how to send HEAD requests with cURL.

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How To Download a File With cURL?

cURL allows for downloading binary files using the cURL -O option here's how to use it effectively and common errors related to file downloads.

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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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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 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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