60 lines
1.4 KiB
Go
60 lines
1.4 KiB
Go
package resolve
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import (
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"bufio"
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"math/rand"
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"os"
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"time"
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)
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// DefaultResolvers contains the default list of resolvers known to be good
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var DefaultResolvers = []string{
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"1.1.1.1", // Cloudflare primary
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"1.0.0.1", // Cloudlfare secondary
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"8.8.8.8", // Google primary
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"8.8.4.4", // Google secondary
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"9.9.9.9", // Quad9 Primary
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"9.9.9.10", // Quad9 Secondary
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"77.88.8.8", // Yandex Primary
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"77.88.8.1", // Yandex Secondary
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"208.67.222.222", // OpenDNS Primary
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"208.67.220.220", // OpenDNS Secondary
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}
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// Resolver is a struct for resolving DNS names
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type Resolver struct {
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resolvers []string
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rand *rand.Rand
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}
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// NewResolver creates a new resolver struct with the default resolvers
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func NewResolver() *Resolver {
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return &Resolver{
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resolvers: []string{},
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rand: rand.New(rand.NewSource(time.Now().UnixNano())),
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}
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}
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// AppendResolversFromFile appends the resolvers read from a file to the list of resolvers
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func (r *Resolver) AppendResolversFromFile(file string) error {
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f, err := os.Open(file)
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if err != nil {
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return err
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}
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scanner := bufio.NewScanner(f)
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for scanner.Scan() {
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text := scanner.Text()
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if text == "" {
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continue
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}
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r.resolvers = append(r.resolvers, text)
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}
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f.Close()
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return scanner.Err()
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}
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// AppendResolversFromSlice appends the slice to the list of resolvers
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func (r *Resolver) AppendResolversFromSlice(list []string) {
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r.resolvers = append(r.resolvers, list...)
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}
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