Small go program to run through a list on stdin and URL unescape each line.

unescape.go

package main

import "fmt"
import "os"
import "net/url"
import "bufio"

func main() {
  scanner := bufio.NewScanner(os.Stdin)
  for scanner.Scan() {
    result, err := url.QueryUnescape(scanner.Text())
    if err != nil {
      printError("PARSER", err)
      return
    }
    fmt.Println(result)
  }
  if err := scanner.Err(); err != nil {
    printError("STDIN", err)
  }
}

func printError(msg string, err error) {
  fmt.Fprintln(os.Stderr, "[" + msg + " ERROR] ", err)
}