traefik/middlewares/auth/auth.go

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package auth
import (
"io/ioutil"
"strings"
)
// UserParser Parses a string and return a userName/userHash. An error if the format of the string is incorrect.
type UserParser func(user string) (string, string, error)
const (
defaultRealm = "traefik"
authorizationHeader = "Authorization"
)
func getUsers(fileName string, appendUsers []string, parser UserParser) (map[string]string, error) {
users, err := loadUsers(fileName, appendUsers)
if err != nil {
return nil, err
}
userMap := make(map[string]string)
for _, user := range users {
userName, userHash, err := parser(user)
if err != nil {
return nil, err
}
userMap[userName] = userHash
}
return userMap, nil
}
func loadUsers(fileName string, appendUsers []string) ([]string, error) {
var users []string
var err error
if fileName != "" {
users, err = getLinesFromFile(fileName)
if err != nil {
return nil, err
}
}
return append(users, appendUsers...), nil
}
func getLinesFromFile(filename string) ([]string, error) {
dat, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
// Trim lines and filter out blanks
rawLines := strings.Split(string(dat), "\n")
var filteredLines []string
for _, rawLine := range rawLines {
line := strings.TrimSpace(rawLine)
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if line != "" && !strings.HasPrefix(line, "#") {
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filteredLines = append(filteredLines, line)
}
}
return filteredLines, nil
}