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Linux Shell Scripting Cookbook by Sarath Lakshman

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Posting to a web page and reading response

POST and GET are two types of requests in HTTP to send information to or retrieve information from a website. In a GET request, we send parameters (name-value pairs) through the web page URL itself. In the case of POST, it won't be attached with the URL. POST is used when a form needs to be submitted. For example, a username, the password to be submitted, and the login page to be retrieved.

POSTing to pages comes as frequent use while writing scripts based on web page retrievals. Let's see how to work with POST. Automating the HTTP GET and POST request by sending POST data and retrieving output is a very important task that we practice while writing shell scripts that parse data from websites.

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