go-zero-width

Zero-width character detection and removal for Go. Inspired by @umpox/be-careful-what-you-copy-invisibly-inserting-usernames-into-text-with-zero-width-characters-18b4e6f17b66">this Medium article.

Installation

go get github.com/trubitsyn/go-zero-width

Usage

package main
 
import (
    "github.com/trubitsyn/go-zero-width"
    "fmt"
)
 
func main() {
    login := "abc​def"                    // zero-width space between "c" and "d"
    clean := zerowidth.RemoveZeroWidthCharacters(login)    // a  b  c           d  e  f
    fmt.Printf("% x\n", login)                // 61 62 63 e2 80 8b 64 65 66
    fmt.Printf("% x\n", clean)                // 61 62 63          64 65 66
}

Supported characters

• Zero-width space (U+200B)
• Zero-width no-break space (U+FEFF)
• Zero-width joiner (U+200D)
• Zero-width non-joiner (U+200C)

Testing

go get -t github.com/trubitsyn/go-zero-width
go test github.com/trubitsyn/go-zero-width

LICENSE

Copyright 2018 Nikola Trubitsyn
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.