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sap-jenkins-library/cmd/integrationArtifactDownload.go

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package cmd
import (
"fmt"
"io"
"io/ioutil"
"mime"
"net/http"
"os"
"path/filepath"
"github.com/SAP/jenkins-library/pkg/command"
"github.com/SAP/jenkins-library/pkg/cpi"
piperhttp "github.com/SAP/jenkins-library/pkg/http"
"github.com/SAP/jenkins-library/pkg/log"
"github.com/SAP/jenkins-library/pkg/telemetry"
"github.com/pkg/errors"
)
type integrationArtifactDownloadUtils interface {
command.ExecRunner
// Add more methods here, or embed additional interfaces, or remove/replace as required.
// The integrationArtifactDownloadUtils interface should be descriptive of your runtime dependencies,
// i.e. include everything you need to be able to mock in tests.
// Unit tests shall be executable in parallel (not depend on global state), and don't (re-)test dependencies.
}
type integrationArtifactDownloadUtilsBundle struct {
*command.Command
// Embed more structs as necessary to implement methods or interfaces you add to integrationArtifactDownloadUtils.
// Structs embedded in this way must each have a unique set of methods attached.
// If there is no struct which implements the method you need, attach the method to
// integrationArtifactDownloadUtilsBundle and forward to the implementation of the dependency.
}
func newIntegrationArtifactDownloadUtils() integrationArtifactDownloadUtils {
utils := integrationArtifactDownloadUtilsBundle{
Command: &command.Command{},
}
// Reroute command output to logging framework
utils.Stdout(log.Writer())
utils.Stderr(log.Writer())
return &utils
}
func integrationArtifactDownload(config integrationArtifactDownloadOptions, telemetryData *telemetry.CustomData) {
// Utils can be used wherever the command.ExecRunner interface is expected.
// It can also be used for example as a mavenExecRunner.
httpClient := &piperhttp.Client{}
// For HTTP calls import piperhttp "github.com/SAP/jenkins-library/pkg/http"
// and use a &piperhttp.Client{} in a custom system
// Example: step checkmarxExecuteScan.go
// Error situations should be bubbled up until they reach the line below which will then stop execution
// through the log.Entry().Fatal() call leading to an os.Exit(1) in the end.
err := runIntegrationArtifactDownload(&config, telemetryData, httpClient)
if err != nil {
log.Entry().WithError(err).Fatal("step execution failed")
}
}
func runIntegrationArtifactDownload(config *integrationArtifactDownloadOptions, telemetryData *telemetry.CustomData, httpClient piperhttp.Sender) error {
clientOptions := piperhttp.ClientOptions{}
header := make(http.Header)
header.Add("Accept", "application/zip")
downloadArtifactURL := fmt.Sprintf("%s/api/v1/IntegrationDesigntimeArtifacts(Id='%s',Version='%s')/$value", config.Host, config.IntegrationFlowID, config.IntegrationFlowVersion)
tokenParameters := cpi.TokenParameters{TokenURL: config.OAuthTokenProviderURL, Username: config.Username, Password: config.Password, Client: httpClient}
token, err := cpi.CommonUtils.GetBearerToken(tokenParameters)
if err != nil {
return errors.Wrap(err, "failed to fetch Bearer Token")
}
clientOptions.Token = fmt.Sprintf("Bearer %s", token)
httpClient.SetOptions(clientOptions)
httpMethod := "GET"
downloadResp, httpErr := httpClient.SendRequest(httpMethod, downloadArtifactURL, nil, header, nil)
if httpErr != nil {
return errors.Wrapf(httpErr, "HTTP %v request to %v failed with error", httpMethod, downloadArtifactURL)
}
if downloadResp == nil {
return errors.Errorf("did not retrieve a HTTP response: %v", httpErr)
}
contentDisposition := downloadResp.Header.Get("Content-Disposition")
disposition, params, err := mime.ParseMediaType(contentDisposition)
if err != nil {
return errors.Wrapf(err, "failed to read filename from http response headers, Content-Disposition "+disposition)
}
filename := params["filename"]
if downloadResp != nil && downloadResp.Body != nil {
defer downloadResp.Body.Close()
}
if downloadResp.StatusCode == 200 {
workspaceRelativePath := config.DownloadPath
err = os.MkdirAll(workspaceRelativePath, 755)
if err != nil {
return errors.Wrapf(err, "Failed to create workspace directory")
}
zipFileName := filepath.Join(workspaceRelativePath, filename)
file, err := os.Create(zipFileName)
if err != nil {
return errors.Wrapf(err, "Failed to create integration flow artifact file")
}
io.Copy(file, downloadResp.Body)
return nil
}
responseBody, readErr := ioutil.ReadAll(downloadResp.Body)
if readErr != nil {
return errors.Wrapf(readErr, "HTTP response body could not be read, Response status code : %v", downloadResp.StatusCode)
}
log.Entry().Errorf("a HTTP error occurred! Response body: %v, Response status code : %v", responseBody, downloadResp.StatusCode)
return errors.Errorf("Integration Flow artifact download failed, Response Status code: %v", downloadResp.StatusCode)
}