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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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#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 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 Send Multiple cURL Requests in Parallel?

To send request in parallel using cURL command line client the -Z or --parallel option can be used and mixed with other config options.

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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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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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Guide to using JSON with cURL

Learn how to send JSON with `cURL` using files, inline data, environment variables, and `jq`. Includes real-world examples for Slack & Google Translate.

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How to Ignore cURL SSL Errors

Learn to handle SSL errors in cURL, including using self-signed certificates. Explore common issues, safe practices.

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How to Use cURL to Download Files

Master file downloads with curl and discover advanced use cases.

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cURL vs Wget: Key Differences Explained

curl and wget are both popular terminal tools but often used for different tasks - let's take a look at the differences.

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How to Use cURL GET Requests

Here's everything you need to know about cURL GET requests and some common pitfalls you should avoid.

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Sending HTTP Requests With Curlie: A better cURL

In this guide, we'll explore Curlie, a better cURL version. We'll start by defining what Curlie is and how it compares to cURL. We'll also go over a step-by-step guide on using and configuring Curlie to send HTTP requests.

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How to Use cURL For Web Scraping

In this article, we'll go over a step-by-step guide on sending and configuring HTTP requests with cURL. We'll also explore advanced usages of cURL for web scraping, such as scraping dynamic pages and avoiding getting blocked.

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Use Curl Impersonate to scrape as Chrome or Firefox

Learn how to prevent TLS fingerprinting by impersonating normal web browser configurations. We'll start by explaining what the Curl Impersonate is, how it works, how to install and use it. Finally, we'll explore using it with Python to avoid web scraping blocking.

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