47 lines
939 B
Go
47 lines
939 B
Go
package main
|
|
|
|
import (
|
|
"encoding/csv"
|
|
"fmt"
|
|
"log"
|
|
"os"
|
|
"strings"
|
|
)
|
|
|
|
func NewValidator(domain string, usersFile string) func(string) bool {
|
|
|
|
validUsers := make(map[string]bool)
|
|
emailSuffix := ""
|
|
if domain != "" {
|
|
emailSuffix = fmt.Sprintf("@%s", domain)
|
|
}
|
|
|
|
if usersFile != "" {
|
|
r, err := os.Open(usersFile)
|
|
if err != nil {
|
|
log.Fatalf("failed opening -authenticated-emails-file=%v, %s", usersFile, err.Error())
|
|
}
|
|
csv_reader := csv.NewReader(r)
|
|
csv_reader.Comma = ','
|
|
csv_reader.Comment = '#'
|
|
csv_reader.TrimLeadingSpace = true
|
|
records, err := csv_reader.ReadAll()
|
|
for _, r := range records {
|
|
validUsers[r[0]] = true
|
|
}
|
|
}
|
|
|
|
validator := func(email string) bool {
|
|
var valid bool
|
|
if emailSuffix != "" {
|
|
valid = strings.HasSuffix(email, emailSuffix)
|
|
}
|
|
if !valid {
|
|
_, valid = validUsers[email]
|
|
}
|
|
log.Printf("validating: is %s valid? %v", email, valid)
|
|
return valid
|
|
}
|
|
return validator
|
|
}
|