57 lines
1.1 KiB
Go
57 lines
1.1 KiB
Go
package externalIpProvider
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import (
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"errors"
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"net"
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"net/http"
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"net/url"
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externalIpProvider "realdnydns/pkg/externalIpProvider"
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)
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type ExternalIpProviderImplPlain struct {
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IPProviderURL string
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HTTPClient *http.Client
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}
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type PlainExternalIpProviderConfig struct {
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Url string `yaml:"url"`
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}
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func New(config PlainExternalIpProviderConfig) (externalIpProvider.ExternalIpProvider, error) {
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if config.Url == "" {
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return nil, errors.New("url is required")
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}
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return &ExternalIpProviderImplPlain{
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config.Url,
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&http.Client{},
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}, nil
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}
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func (p *ExternalIpProviderImplPlain) GetExternalIp() (net.IP, error) {
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parsedUrl, err := url.Parse(p.IPProviderURL)
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if err != nil {
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return nil, err
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}
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res, err := p.HTTPClient.Get(parsedUrl.String())
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if err != nil {
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return nil, err
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}
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if res.StatusCode != 200 {
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return nil, errors.New("unexpected status code")
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}
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responseBody := make([]byte, res.ContentLength)
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res.Body.Read(responseBody)
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defer res.Body.Close()
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parsedIp := net.ParseIP(string(responseBody))
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if parsedIp == nil {
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return nil, errors.New("unable to parse ip")
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}
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return parsedIp, nil
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}
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