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package setup
import (
"strings"
"github.com/mholt/caddy/middleware"
"github.com/mholt/caddy/middleware/basicauth"
)
// BasicAuth configures a new BasicAuth middleware instance.
func BasicAuth(c *Controller) (middleware.Middleware, error) {
root := c.Root
rules, err := basicAuthParse(c)
if err != nil {
return nil, err
}
basic := basicauth.BasicAuth{Rules: rules}
return func(next middleware.Handler) middleware.Handler {
basic.Next = next
basic.SiteRoot = root
return basic
}, nil
}
func basicAuthParse(c *Controller) ([]basicauth.Rule, error) {
var rules []basicauth.Rule
var err error
for c.Next() {
var rule basicauth.Rule
args := c.RemainingArgs()
switch len(args) {
case 2:
rule.Username = args[0]
if rule.Password, err = passwordMatcher(rule.Username, args[1], c.Root); err != nil {
return rules, c.Errf("Get password matcher from %s: %v", c.Val(), err)
}
for c.NextBlock() {
rule.Resources = append(rule.Resources, c.Val())
if c.NextArg() {
return rules, c.Errf("Expecting only one resource per line (extra '%s')", c.Val())
}
}
case 3:
rule.Resources = append(rule.Resources, args[0])
rule.Username = args[1]
if rule.Password, err = passwordMatcher(rule.Username, args[2], c.Root); err != nil {
return rules, c.Errf("Get password matcher from %s: %v", c.Val(), err)
}
default:
return rules, c.ArgErr()
}
rules = append(rules, rule)
}
return rules, nil
}
func passwordMatcher(username, passw, siteRoot string) (basicauth.PasswordMatcher, error) {
if !strings.HasPrefix(passw, "htpasswd=") {
return basicauth.PlainMatcher(passw), nil
}
return basicauth.GetHtpasswdMatcher(passw[9:], username, siteRoot)
}
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