How to Set Authentication with cURL - Full Examples Guide
cURl is a viable tool for requesting and transferring data from web pages. However, an obstacle is often encountered: authentication. In this guide, we'll explain how to set cURL authentication for different types:
Basic auth.
Bearer tokens.
Cookies.
Let's get started!
Basic Auth With cURL
The basic auth method is one of the oldest methods for managing authentication. It requires entering basic credentials data, username and password:
Authentication in the above image can be found at httpbin.dev/basic-auth. It requires entering the auth credentials before the request can proceed to the data.
To set basic authentication with cURL, we can use the --user or -u cURL options followed by the --basic option to mark it as basic auth:
The above cURL command will enter the credentials data (user and passwd) to authorize the request. Here is the response of the above cURL command:
{
"authorized": true,
"user": "user"
}
Bearer Tokens With cURL
Bearer tokens are popular authentication methods for modern applications. They are tokens generated after the credentials are entered for the first time and used as a header for the requests to authenticate them.
If we go over the previous authentication endpoint on the browser and refresh the page, we'll find the authentication token used with the request headers:
To set Bearer authentication with cURL, we'll add the above Authorization header to the cURL command using the -H option:
From the response, we can see that the cURL request was successfully authenticated:
{
"authorized": true,
"user": "user"
}
Authentication Cookies With cURL
Another popular method of managing authentication is using cookies, which function similarly to bearer tokens. After the credentials are validated successfully, a cookie value is created and saved to authorize future requests.
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