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image.go
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image.go
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package dynatrace
import (
"bytes"
"context"
"encoding/json"
"net/http"
"github.com/Dynatrace/dynatrace-operator/pkg/clients/utils"
"github.com/pkg/errors"
)
type LatestImageInfo struct {
Source string `json:"source"`
Tag string `json:"tag"`
}
func (image LatestImageInfo) String() string {
return image.Source + ":" + image.Tag
}
func (dtc *dynatraceClient) GetLatestOneAgentImage(ctx context.Context) (*LatestImageInfo, error) {
latestImageInfo, err := dtc.processLatestImageRequest(ctx, dtc.getLatestOneAgentImageUrl())
if err != nil {
log.Info("failed to process latest image response")
return nil, err
}
return latestImageInfo, nil
}
func (dtc *dynatraceClient) GetLatestCodeModulesImage(ctx context.Context) (*LatestImageInfo, error) {
latestImageInfo, err := dtc.processLatestImageRequest(ctx, dtc.getLatestCodeModulesImageUrl())
if err != nil {
log.Info("failed to process latest image response")
return nil, err
}
return latestImageInfo, nil
}
func (dtc *dynatraceClient) GetLatestActiveGateImage(ctx context.Context) (*LatestImageInfo, error) {
latestImageInfo, err := dtc.processLatestImageRequest(ctx, dtc.getLatestActiveGateImageUrl())
if err != nil {
log.Info("failed to process latest image response")
return nil, err
}
return latestImageInfo, nil
}
func (dtc *dynatraceClient) processLatestImageRequest(ctx context.Context, url string) (*LatestImageInfo, error) {
request, err := dtc.createLatestImageRequest(ctx, url)
if err != nil {
return nil, errors.WithStack(err)
}
response, err := dtc.httpClient.Do(request)
if err != nil {
log.Info("failed to retrieve latest image")
return nil, err
}
defer utils.CloseBodyAfterRequest(response)
latestImageInfo, err := dtc.handleLatestImageResponse(response)
if err != nil {
log.Info("failed to handle latest image response")
return nil, err
}
return latestImageInfo, nil
}
func (dtc *dynatraceClient) handleLatestImageResponse(response *http.Response) (*LatestImageInfo, error) {
defer func() {
err := response.Body.Close()
if err != nil {
log.Error(err, err.Error())
}
}()
data, err := dtc.getServerResponseData(response)
if err != nil {
return nil, dtc.handleErrorResponseFromAPI(data, response.StatusCode)
}
latestImageInfo, err := dtc.readResponseForLatestImage(data)
if err != nil {
return nil, err
}
return latestImageInfo, err
}
func (dtc *dynatraceClient) createLatestImageRequest(ctx context.Context, url string) (*http.Request, error) {
body := &LatestImageInfo{}
bodyData, err := json.Marshal(body)
if err != nil {
return nil, err
}
request, err := createBaseRequest(
ctx,
url,
http.MethodGet,
dtc.apiToken,
bytes.NewReader(bodyData),
)
if err != nil {
return nil, errors.WithStack(err)
}
return request, nil
}
func (dtc *dynatraceClient) readResponseForLatestImage(response []byte) (*LatestImageInfo, error) {
latestImageInfo := &LatestImageInfo{}
err := json.Unmarshal(response, latestImageInfo)
if err != nil {
log.Error(err, "error unmarshalling LatestImageInfo", "response", string(response))
return nil, err
}
return latestImageInfo, nil
}