Fixes path escaping for Repositories.GetContents

Fixes #308.
Fixes #309.

Change-Id: I71d1422c90f32cc6e6834ed428a311a2b2b88778

github/repos_contents.go

@@ -128,9 +128,7 @@ func (s *RepositoriesService) DownloadContents(owner, repo, filepath string, opt
 //
 // GitHub API docs: http://developer.github.com/v3/repos/contents/#get-contents
 func (s *RepositoriesService) GetContents(owner, repo, path string, opt *RepositoryContentGetOptions) (fileContent *RepositoryContent, directoryContent []*RepositoryContent, resp *Response, err error) {
-	// escape characters not allowed in URL path.  This actually escapes a
-	// lot more, but seems to be harmless.
-	escapedPath := url.QueryEscape(path)
+	escapedPath := (&url.URL{Path: path}).String()
 	u := fmt.Sprintf("repos/%s/%s/contents/%s", owner, repo, escapedPath)
 	u, err = addOptions(u, opt)
 	if err != nil {

github/repos_contents_test.go

@@ -154,6 +154,32 @@ func TestRepositoriesService_GetContents_FilenameNeedsEscape(t *testing.T) {
 	}
 }
 
+func TestRepositoriesService_GetContents_DirectoryWithSpaces(t *testing.T) {
+	setup()
+	defer teardown()
+	mux.HandleFunc("/repos/o/r/contents/some directory/file.go", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		fmt.Fprint(w, `{}`)
+	})
+	_, _, _, err := client.Repositories.GetContents("o", "r", "some directory/file.go", &RepositoryContentGetOptions{})
+	if err != nil {
+		t.Fatalf("Repositories.GetContents returned error: %v", err)
+	}
+}
+
+func TestRepositoriesService_GetContents_DirectoryWithPlusChars(t *testing.T) {
+	setup()
+	defer teardown()
+	mux.HandleFunc("/repos/o/r/contents/some directory+name/file.go", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		fmt.Fprint(w, `{}`)
+	})
+	_, _, _, err := client.Repositories.GetContents("o", "r", "some directory+name/file.go", &RepositoryContentGetOptions{})
+	if err != nil {
+		t.Fatalf("Repositories.GetContents returned error: %v", err)
+	}
+}
+
 func TestRepositoriesService_GetContents_Directory(t *testing.T) {
 	setup()
 	defer teardown()