Peter Kurfer
49e58ac2e4
- move to Gitlab - make code better testable - create app abstraction for server - cleanup
60 lines
962 B
Go
60 lines
962 B
Go
package dns_mock
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import (
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"net"
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"regexp"
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"github.com/spf13/viper"
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)
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const (
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fallbackArgsConfigKey = "fallback.args"
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)
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type resolverRule struct {
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pattern *regexp.Regexp
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response net.IP
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}
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type dnsOptions struct {
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Rules []resolverRule
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Fallback ResolverFallback
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}
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func loadFromConfig(config *viper.Viper) (options dnsOptions, err error) {
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type rule struct {
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Pattern string
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Response string
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}
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type fallback struct {
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Strategy string
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}
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opts := struct {
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Rules []rule
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Fallback fallback
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}{}
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err = config.Unmarshal(&opts)
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for _, rule := range opts.Rules {
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var err error
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var rr resolverRule
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if rr.pattern, err = regexp.Compile(rule.Pattern); err != nil {
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continue
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}
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if rr.response = net.ParseIP(rule.Response); rr.response == nil {
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continue
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}
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options.Rules = append(options.Rules, rr)
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}
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options.Fallback = CreateResolverFallback(
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opts.Fallback.Strategy,
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config.Sub(fallbackArgsConfigKey),
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)
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return
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}
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