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package setup
import (
"fmt"
"strings"
"github.com/mholt/caddy/middleware"
"github.com/mholt/caddy/middleware/mime"
)
// Mime configures a new mime middleware instance.
func Mime(c *Controller) (middleware.Middleware, error) {
configs, err := mimeParse(c)
if err != nil {
return nil, err
}
return func(next middleware.Handler) middleware.Handler {
return mime.Mime{Next: next, Configs: configs}
}, nil
}
func mimeParse(c *Controller) ([]mime.Config, error) {
var configs []mime.Config
for c.Next() {
// At least one extension is required
args := c.RemainingArgs()
switch len(args) {
case 2:
if err := validateExt(args[0]); err != nil {
return configs, err
}
configs = append(configs, mime.Config{Ext: args[0], ContentType: args[1]})
case 1:
return configs, c.ArgErr()
case 0:
for c.NextBlock() {
ext := c.Val()
if err := validateExt(ext); err != nil {
return configs, err
}
if !c.NextArg() {
return configs, c.ArgErr()
}
configs = append(configs, mime.Config{Ext: ext, ContentType: c.Val()})
}
}
}
return configs, nil
}
// validateExt checks for valid file name extension.
func validateExt(ext string) error {
if !strings.HasPrefix(ext, ".") {
return fmt.Errorf(`mime: invalid extension "%v" (must start with dot)`, ext)
}
return nil
}
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