Artifacts download api for artifact actions v4 (#33510)

* download endpoint has to use 302 redirect
* fake blob download used if direct download not possible
* downloading v3 artifacts not possible

New repo apis based on GitHub Rest V3
- GET /runs/{run}/artifacts (Cannot use run index of url due to not
being unique)
- GET /artifacts
- GET + DELETE /artifacts/{artifact_id}
- GET /artifacts/{artifact_id}/zip
- (GET /artifacts/{artifact_id}/zip/raw this is a workaround for a http
302 assertion in actions/toolkit)
- api docs removed this is protected by a signed url like the internal
artifacts api and no longer usable with any token or swagger
  - returns http 401 if the signature is invalid
    - or change the artifact id
    - or expired after 1 hour

Closes #33353
Closes #32124

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/web/repo/actions/view.go

@@ -26,7 +26,6 @@ import (
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
-	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/storage"
 	"code.gitea.io/gitea/modules/templates"
 	"code.gitea.io/gitea/modules/timeutil"
@@ -669,7 +668,7 @@ func ArtifactsDownloadView(ctx *context_module.Context) {
 
 	// if artifacts status is not uploaded-confirmed, treat it as not found
 	for _, art := range artifacts {
-		if art.Status != int64(actions_model.ArtifactStatusUploadConfirmed) {
+		if art.Status != actions_model.ArtifactStatusUploadConfirmed {
 			ctx.Error(http.StatusNotFound, "artifact not found")
 			return
 		}
@@ -677,23 +676,12 @@ func ArtifactsDownloadView(ctx *context_module.Context) {
 
 	ctx.Resp.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%s.zip; filename*=UTF-8''%s.zip", url.PathEscape(artifactName), artifactName))
 
-	// Artifacts using the v4 backend are stored as a single combined zip file per artifact on the backend
-	// The v4 backend enshures ContentEncoding is set to "application/zip", which is not the case for the old backend
-	if len(artifacts) == 1 && artifacts[0].ArtifactName+".zip" == artifacts[0].ArtifactPath && artifacts[0].ContentEncoding == "application/zip" {
-		art := artifacts[0]
-		if setting.Actions.ArtifactStorage.ServeDirect() {
-			u, err := storage.ActionsArtifacts.URL(art.StoragePath, art.ArtifactPath, nil)
-			if u != nil && err == nil {
-				ctx.Redirect(u.String())
-				return
-			}
-		}
-		f, err := storage.ActionsArtifacts.Open(art.StoragePath)
+	if len(artifacts) == 1 && actions.IsArtifactV4(artifacts[0]) {
+		err := actions.DownloadArtifactV4(ctx.Base, artifacts[0])
 		if err != nil {
 			ctx.Error(http.StatusInternalServerError, err.Error())
 			return
 		}
-		_, _ = io.Copy(ctx.Resp, f)
 		return
 	}