Over the past few years I've built up a collection of snippets for validating inputs in Go. There's nothing new or groundbreaking here, but hopefully they might save you some time. The snippets assume that the data to validate is stored as strings in r.Form, but the principles are the same no matter where the data has come from. Required inputs Blank text Min and max length (bytes) Min and max length (number of characters) Starts with, ends with and contains Matches regular expression pattern...
