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