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stableTagProvider.go
53 lines (42 loc) · 1.11 KB
/
stableTagProvider.go
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package softwareVersion
import (
"bytes"
"encoding/json"
"net/http"
)
type stableTagProvider struct {
stableTagLocation string
}
// NewStableTagProvider returns a new instance of stableTagProvider
func NewStableTagProvider(stableTagLocation string) *stableTagProvider {
return &stableTagProvider{stableTagLocation: stableTagLocation}
}
// FetchTagVersion will call the provided URL and will fetch the software version
func (stp *stableTagProvider) FetchTagVersion() (string, error) {
resp, err := http.DefaultClient.Get(stp.stableTagLocation)
if err != nil {
return "", err
}
defer func() {
err = resp.Body.Close()
if err != nil {
log.Debug(err.Error())
}
http.DefaultClient.CloseIdleConnections()
}()
buf := new(bytes.Buffer)
_, err = buf.ReadFrom(resp.Body)
if err != nil {
return "", err
}
respBytes := buf.Bytes()
var tag tagVersion
if err = json.Unmarshal(respBytes, &tag); err != nil {
return "", err
}
return tag.TagVersion, nil
}
// IsInterfaceNil returns true if there is no value under the interface
func (stp *stableTagProvider) IsInterfaceNil() bool {
return stp == nil
}