fix repo url being decoded while downloading repo index (#6060)

Signed-off-by: Karuppiah Natarajan <karuppiah7890@gmail.com>

pkg/repo/chartrepo.go

@@ -21,6 +21,7 @@ import (
 	"io/ioutil"
 	"net/url"
 	"os"
+	"path"
 	"path/filepath"
 	"strings"
 
@@ -111,14 +112,13 @@ func (r *ChartRepository) Load() error {
 // cachePath is prepended to any index that does not have an absolute path. This
 // is for pre-2.2.0 repo files.
 func (r *ChartRepository) DownloadIndexFile(cachePath string) error {
-	var indexURL string
 	parsedURL, err := url.Parse(r.Config.URL)
 	if err != nil {
 		return err
 	}
-	parsedURL.Path = strings.TrimSuffix(parsedURL.Path, "/") + "/index.yaml"
-
-	indexURL = parsedURL.String()
+	parsedURL.RawPath = path.Join(parsedURL.RawPath, "index.yaml")
+	parsedURL.Path = path.Join(parsedURL.Path, "index.yaml")
+	indexURL := parsedURL.String()
 
 	r.setCredentials()
 	resp, err := r.Client.Get(indexURL)

pkg/repo/index_test.go

@@ -18,6 +18,7 @@ package repo
 
 import (
 	"io/ioutil"
+	"net/http"
 	"os"
 	"path/filepath"
 	"strings"
@@ -143,6 +144,7 @@ func TestMerge(t *testing.T) {
 }
 
 func TestDownloadIndexFile(t *testing.T) {
+	t.Run("should  download index file", func(t *testing.T) {
 		srv, err := startLocalServerForTests(nil)
 		if err != nil {
 			t.Fatal(err)
@@ -185,6 +187,62 @@ func TestDownloadIndexFile(t *testing.T) {
 		}
 
 		verifyLocalIndex(t, i)
+	})
+
+	t.Run("should not decode the path in the repo url while downloading index", func(t *testing.T) {
+		chartRepoURLPath := "/some%2Fpath/test"
+		fileBytes, err := ioutil.ReadFile("testdata/local-index.yaml")
+		if err != nil {
+			t.Fatal(err)
+		}
+		handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if r.URL.RawPath == chartRepoURLPath+"/index.yaml" {
+				w.Write(fileBytes)
+			}
+		})
+		srv, err := startLocalServerForTests(handler)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer srv.Close()
+
+		dirName, err := ioutil.TempDir("", "tmp")
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer os.RemoveAll(dirName)
+
+		indexFilePath := filepath.Join(dirName, testRepo+"-index.yaml")
+		r, err := NewChartRepository(&Entry{
+			Name:  testRepo,
+			URL:   srv.URL + chartRepoURLPath,
+			Cache: indexFilePath,
+		}, getter.All(environment.EnvSettings{}))
+		if err != nil {
+			t.Errorf("Problem creating chart repository from %s: %v", "testrepo", err)
+		}
+
+		if err := r.DownloadIndexFile(""); err != nil {
+			t.Errorf("%#v", err)
+		}
+
+		if _, err := os.Stat(indexFilePath); err != nil {
+			t.Errorf("error finding created index file: %#v", err)
+		}
+
+		b, err := ioutil.ReadFile(indexFilePath)
+		if err != nil {
+			t.Errorf("error reading index file: %#v", err)
+		}
+
+		i, err := loadIndex(b)
+		if err != nil {
+			t.Errorf("Index %q failed to parse: %s", testfile, err)
+			return
+		}
+
+		verifyLocalIndex(t, i)
+	})
 }
 
 func verifyLocalIndex(t *testing.T, i *IndexFile) {