HTTP input validation is the process of verifying and validating the data received from a client to a server over the Hypertext Transfer Protocol (HTTP). It is important because it helps to ensure that the data submitted by the user is accurate, complete, and secure. This is achieved by setting validation rules to check if the data conforms to specific criteria such as data type, length, format, and syntax. Input validation helps to prevent common forms of web application attacks such as SQL injection, cross-site scripting (XSS), and command injection.
