From 0a97480934fc2082c9cff18a5b66cedc12575919 Mon Sep 17 00:00:00 2001
From: 6543 <6543@obermui.de>
Date: Thu, 21 Jul 2022 21:18:41 +0200
Subject: [PATCH] Add "X-Gitea-Object-Type" header for GET `/raw/` & `/media/`
 API (#20438)

---
 integrations/api_repo_raw_test.go    |  8 ++++++--
 routers/api/v1/repo/file.go          | 14 ++++++++++----
 services/repository/files/content.go | 16 ++++++++++++++++
 3 files changed, 32 insertions(+), 6 deletions(-)

diff --git a/integrations/api_repo_raw_test.go b/integrations/api_repo_raw_test.go
index 2a77d1ba6..258b409be 100644
--- a/integrations/api_repo_raw_test.go
+++ b/integrations/api_repo_raw_test.go
@@ -10,6 +10,8 @@ import (
 
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestAPIReposRaw(t *testing.T) {
@@ -25,9 +27,11 @@ func TestAPIReposRaw(t *testing.T) {
 		"65f1bf27bc3bf70f64657658635e66094edbcb4d", // Commit
 	} {
 		req := NewRequestf(t, "GET", "/api/v1/repos/%s/repo1/raw/%s/README.md?token="+token, user.Name, ref)
-		session.MakeRequest(t, req, http.StatusOK)
+		resp := session.MakeRequest(t, req, http.StatusOK)
+		assert.EqualValues(t, "file", resp.Header().Get("x-gitea-object-type"))
 	}
 	// Test default branch
 	req := NewRequestf(t, "GET", "/api/v1/repos/%s/repo1/raw/README.md?token="+token, user.Name)
-	session.MakeRequest(t, req, http.StatusOK)
+	resp := session.MakeRequest(t, req, http.StatusOK)
+	assert.EqualValues(t, "file", resp.Header().Get("x-gitea-object-type"))
 }
diff --git a/routers/api/v1/repo/file.go b/routers/api/v1/repo/file.go
index 1ac108883..ba8a938b8 100644
--- a/routers/api/v1/repo/file.go
+++ b/routers/api/v1/repo/file.go
@@ -33,6 +33,8 @@ import (
 	files_service "code.gitea.io/gitea/services/repository/files"
 )
 
+const giteaObjectTypeHeader = "X-Gitea-Object-Type"
+
 // GetRawFile get a file by path on a repository
 func GetRawFile(ctx *context.APIContext) {
 	// swagger:operation GET /repos/{owner}/{repo}/raw/{filepath} repository repoGetRawFile
@@ -72,11 +74,13 @@ func GetRawFile(ctx *context.APIContext) {
 		return
 	}
 
-	blob, lastModified := getBlobForEntry(ctx)
+	blob, entry, lastModified := getBlobForEntry(ctx)
 	if ctx.Written() {
 		return
 	}
 
+	ctx.RespHeader().Set(giteaObjectTypeHeader, string(files_service.GetObjectTypeFromTreeEntry(entry)))
+
 	if err := common.ServeBlob(ctx.Context, blob, lastModified); err != nil {
 		ctx.Error(http.StatusInternalServerError, "ServeBlob", err)
 	}
@@ -119,11 +123,13 @@ func GetRawFileOrLFS(ctx *context.APIContext) {
 		return
 	}
 
-	blob, lastModified := getBlobForEntry(ctx)
+	blob, entry, lastModified := getBlobForEntry(ctx)
 	if ctx.Written() {
 		return
 	}
 
+	ctx.RespHeader().Set(giteaObjectTypeHeader, string(files_service.GetObjectTypeFromTreeEntry(entry)))
+
 	// LFS Pointer files are at most 1024 bytes - so any blob greater than 1024 bytes cannot be an LFS file
 	if blob.Size() > 1024 {
 		// First handle caching for the blob
@@ -218,7 +224,7 @@ func GetRawFileOrLFS(ctx *context.APIContext) {
 	}
 }
 
-func getBlobForEntry(ctx *context.APIContext) (blob *git.Blob, lastModified time.Time) {
+func getBlobForEntry(ctx *context.APIContext) (blob *git.Blob, entry *git.TreeEntry, lastModified time.Time) {
 	entry, err := ctx.Repo.Commit.GetTreeEntryByPath(ctx.Repo.TreePath)
 	if err != nil {
 		if git.IsErrNotExist(err) {
@@ -251,7 +257,7 @@ func getBlobForEntry(ctx *context.APIContext) (blob *git.Blob, lastModified time
 	}
 	blob = entry.Blob()
 
-	return blob, lastModified
+	return blob, entry, lastModified
 }
 
 // GetArchive get archive of a repository
diff --git a/services/repository/files/content.go b/services/repository/files/content.go
index 2237671a6..c20690928 100644
--- a/services/repository/files/content.go
+++ b/services/repository/files/content.go
@@ -101,6 +101,22 @@ func GetContentsOrList(ctx context.Context, repo *repo_model.Repository, treePat
 	return fileList, nil
 }
 
+// GetObjectTypeFromTreeEntry check what content is behind it
+func GetObjectTypeFromTreeEntry(entry *git.TreeEntry) ContentType {
+	switch {
+	case entry.IsDir():
+		return ContentTypeDir
+	case entry.IsSubModule():
+		return ContentTypeSubmodule
+	case entry.IsExecutable(), entry.IsRegular():
+		return ContentTypeRegular
+	case entry.IsLink():
+		return ContentTypeLink
+	default:
+		return ""
+	}
+}
+
 // GetContents gets the meta data on a file's contents. Ref can be a branch, commit or tag
 func GetContents(ctx context.Context, repo *repo_model.Repository, treePath, ref string, forList bool) (*api.ContentsResponse, error) {
 	if ref == "" {