mirror of
https://github.com/Luzifer/named-blacklist.git
synced 2024-11-08 07:20:07 +00:00
107 lines
2.4 KiB
Go
107 lines
2.4 KiB
Go
package main
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import (
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"io"
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"io/ioutil"
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"net/http"
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"os"
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"sort"
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"strings"
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"text/template"
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"github.com/pkg/errors"
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"gopkg.in/yaml.v2"
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korvike "github.com/Luzifer/korvike/functions"
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)
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const defaultTemplate = `$TTL 1H
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@ SOA LOCALHOST. dns-master.localhost. (1 1h 15m 30d 2h)
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NS LOCALHOST.
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; Blacklist entries
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{{ range .blacklist -}}
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{{ to_punycode .Domain }} CNAME . ; {{ .Comment }}
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{{ end }}`
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type providerType string
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type providerAction string
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const (
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providerActionBlacklist providerAction = "blacklist"
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providerActionWhitelist providerAction = "whitelist"
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)
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type configfile struct {
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Providers []providerDefinition `yaml:"providers"`
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Template string `yaml:"template"`
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tpl *template.Template
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}
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type providerDefinition struct {
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Action providerAction `yaml:"action"`
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Content string `yaml:"content"`
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File string `yaml:"file"`
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Name string `yaml:"name"`
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Type providerType `yaml:"type"`
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URL string `yaml:"url"`
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}
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func (p providerDefinition) GetContent() (io.ReadCloser, error) {
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switch {
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case p.Content != "":
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return ioutil.NopCloser(strings.NewReader(p.Content)), nil
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case p.File != "":
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return os.Open(p.File)
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case p.URL != "":
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resp, err := http.Get(p.URL) //nolint:bodyclose // This does not need to be closed here and would break stuff
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if err != nil {
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return nil, errors.Wrap(err, "downloading content")
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}
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return resp.Body, nil
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default:
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return nil, errors.New("Neither file nor URL specified")
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}
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}
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func loadConfigFile(filename string) (*configfile, error) {
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if _, err := os.Stat(filename); err != nil {
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return nil, errors.Wrap(err, "Unable to access given file")
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}
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f, err := os.Open(filename)
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if err != nil {
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return nil, errors.Wrap(err, "Unable to open given file")
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}
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defer f.Close()
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out := &configfile{Template: defaultTemplate}
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if err = yaml.NewDecoder(f).Decode(out); err != nil {
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return nil, errors.Wrap(err, "Unable to parse given file")
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}
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funcs := korvike.GetFunctionMap()
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funcs["to_punycode"] = domainToPunycode
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funcs["join"] = strings.Join
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funcs["sort"] = func(in []string) []string {
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sort.Slice(in, func(i, j int) bool { return strings.ToLower(in[i]) < strings.ToLower(in[j]) })
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return in
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}
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if out.tpl, err = template.
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New("configTemplate").
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Funcs(funcs).
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Parse(out.Template); err != nil {
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return nil, errors.Wrap(err, "Unable to parse given template")
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}
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return out, nil
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}
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