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url.go
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url.go
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// Package checker is a Go library for validating user input through struct tags.
//
// https://github.com/cinar/checker
//
// Copyright 2023 Onur Cinar. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
//
package checker
import (
"net/url"
"reflect"
)
// CheckerURL is the name of the checker.
const CheckerURL = "url"
// ResultNotURL indicates that the given value is not a valid URL.
const ResultNotURL = "NOT_URL"
// IsURL checks if the given value is a valid URL.
func IsURL(value string) Result {
url, err := url.ParseRequestURI(value)
if err != nil {
return ResultNotURL
}
if url.Scheme == "" {
return ResultNotURL
}
if url.Host == "" {
return ResultNotURL
}
return ResultValid
}
// makeURL makes a checker function for the URL checker.
func makeURL(_ string) CheckFunc {
return checkURL
}
// checkURL checks if the given value is a valid URL.
func checkURL(value, _ reflect.Value) Result {
if value.Kind() != reflect.String {
panic("string expected")
}
return IsURL(value.String())
}