Fixed base URL appending when chart address is not absolute

pkg/downloader/chart_downloader.go

@@ -82,25 +82,14 @@ type ChartDownloader struct {
 // (if provenance was verified), or an error if something bad happened.
 func (c *ChartDownloader) DownloadTo(ref, version, dest string) (string, *provenance.Verification, error) {
 	u, g, err := c.ResolveChartVersion(ref, version)
+
 	if err != nil {
 		return "", nil, err
 	}
 
-	chartURL := u.String()
-
-	data, err := g.Get(chartURL)
-	if err != nil {
-		originalError := err
-
-		chartURL, err = fixupURL(chartURL)
-		if err != nil {
-			return "", nil, originalError
-		}
-		fmt.Println(chartURL)
-		data, err = g.Get(chartURL)
+	data, err := g.Get(u.String())
 	if err != nil {
-			return "", nil, originalError
-		}
+		return "", nil, err
 	}
 
 	name := filepath.Base(u.Path)
@@ -137,34 +126,6 @@ func (c *ChartDownloader) DownloadTo(ref, version, dest string) (string, *proven
 	return destfile, ver, nil
 }
 
-// https://github.com/kubernetes/helm/issues/2937
-// tries to fix URL because of BUG #2937
-// transforms URL from
-// https://url.to.repo/path?key=value/chart-0.1.0.tgz
-// into
-// https://url.to.repo/path/chart-0-1-0.tgz?key=value
-func fixupURL(chartURL string) (string, error) {
-	queryStringStartIndex := strings.Index(chartURL, "?")
-
-	if queryStringStartIndex == -1 {
-		return "", errors.New("Could not fixup URL")
-	}
-	var appendedURLIndex int
-	for i := queryStringStartIndex + 1; i < len(chartURL); i++ {
-		if chartURL[i] == '/' {
-			appendedURLIndex = i
-			break
-		}
-	}
-
-	appendedURL := chartURL[appendedURLIndex:]
-	restURL := chartURL[0:appendedURLIndex]
-
-	uu, _ := url.Parse(restURL)
-	uu.Path = strings.TrimSuffix(uu.Path, "/") + appendedURL
-	return uu.String(), nil
-}
-
 // ResolveChartVersion resolves a chart reference to a URL.
 //
 // It returns the URL as well as a preconfigured repo.Getter that can fetch
@@ -251,13 +212,19 @@ func (c *ChartDownloader) ResolveChartVersion(ref, version string) (*url.URL, ge
 
 	// TODO: Seems that picking first URL is not fully correct
 	u, err = url.Parse(cv.URLs[0])
+
 	if err != nil {
 		return u, r.Client, fmt.Errorf("invalid chart URL format: %s", ref)
 	}
 
 	// If the URL is relative (no scheme), prepend the chart repo's base URL
 	if !u.IsAbs() {
-		u, err = url.Parse(rc.URL + "/" + u.Path)
+		path := u.Path
+		u, err = url.Parse(rc.URL)
+		if err != nil {
+			return nil, r.Client, err
+		}
+		u.Path = u.Path + path
 		return u, r.Client, err
 	}