Fix javascript error when an anonymous user visiting migration page (#32144)

This PR fixes javascript errors when an anonymous user visits the
migration page.
It also makes task view checking more restrictive.

The router moved from `/user/task/{id}/status` to
`/username/reponame/-/migrate/status` because it's a migrate status.

---------

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

Author: lunny

models/admin/task.go

@@ -179,27 +179,6 @@ func GetMigratingTask(ctx context.Context, repoID int64) (*Task, error) {
 	return &task, nil
 }
 
-// GetMigratingTaskByID returns the migrating task by repo's id
-func GetMigratingTaskByID(ctx context.Context, id, doerID int64) (*Task, *migration.MigrateOptions, error) {
-	task := Task{
-		ID:     id,
-		DoerID: doerID,
-		Type:   structs.TaskTypeMigrateRepo,
-	}
-	has, err := db.GetEngine(ctx).Get(&task)
-	if err != nil {
-		return nil, nil, err
-	} else if !has {
-		return nil, nil, ErrTaskDoesNotExist{id, 0, task.Type}
-	}
-
-	var opts migration.MigrateOptions
-	if err := json.Unmarshal([]byte(task.PayloadContent), &opts); err != nil {
-		return nil, nil, err
-	}
-	return &task, &opts, nil
-}
-
 // CreateTask creates a task on database
 func CreateTask(ctx context.Context, task *Task) error {
 	return db.Insert(ctx, task)

routers/web/repo/migrate.go

@@ -15,6 +15,7 @@ import (
 	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/base"
+	"code.gitea.io/gitea/modules/json"
 	"code.gitea.io/gitea/modules/lfs"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
@@ -288,3 +289,40 @@ func MigrateCancelPost(ctx *context.Context) {
 	}
 	ctx.Redirect(ctx.Repo.Repository.Link())
 }
+
+// MigrateStatus returns migrate task's status
+func MigrateStatus(ctx *context.Context) {
+	task, err := admin_model.GetMigratingTask(ctx, ctx.Repo.Repository.ID)
+	if err != nil {
+		if admin_model.IsErrTaskDoesNotExist(err) {
+			ctx.JSON(http.StatusNotFound, map[string]any{
+				"err": "task does not exist or you do not have access to this task",
+			})
+			return
+		}
+		log.Error("GetMigratingTask: %v", err)
+		ctx.JSON(http.StatusInternalServerError, map[string]any{
+			"err": http.StatusText(http.StatusInternalServerError),
+		})
+		return
+	}
+
+	message := task.Message
+
+	if task.Message != "" && task.Message[0] == '{' {
+		// assume message is actually a translatable string
+		var translatableMessage admin_model.TranslatableMessage
+		if err := json.Unmarshal([]byte(message), &translatableMessage); err != nil {
+			translatableMessage = admin_model.TranslatableMessage{
+				Format: "migrate.migrating_failed.error",
+				Args:   []any{task.Message},
+			}
+		}
+		message = ctx.Locale.TrString(translatableMessage.Format, translatableMessage.Args...)
+	}
+
+	ctx.JSON(http.StatusOK, map[string]any{
+		"status":  task.Status,
+		"message": message,
+	})
+}

routers/web/user/task.go

@@ -669,7 +669,6 @@ func registerRoutes(m *web.Router) {
 		m.Get("/forgot_password", auth.ForgotPasswd)
 		m.Post("/forgot_password", auth.ForgotPasswdPost)
 		m.Post("/logout", auth.SignOut)
-		m.Get("/task/{task}", reqSignIn, user.TaskStatus)
 		m.Get("/stopwatches", reqSignIn, user.GetStopwatches)
 		m.Get("/search", ignExploreSignIn, user.Search)
 		m.Group("/oauth2", func() {
@@ -1042,6 +1041,13 @@ func registerRoutes(m *web.Router) {
 	}, ignSignIn, context.UserAssignmentWeb(), context.OrgAssignment())
 	// end "/{username}/-": packages, projects, code
 
+	m.Group("/{username}/{reponame}/-", func() {
+		m.Group("/migrate", func() {
+			m.Get("/status", repo.MigrateStatus)
+		})
+	}, ignSignIn, context.RepoAssignment, reqRepoCodeReader)
+	// end "/{username}/{reponame}/-": migrate
+
 	m.Group("/{username}/{reponame}/settings", func() {
 		m.Group("", func() {
 			m.Combo("").Get(repo_setting.Settings).

routers/web/web.go

@@ -614,7 +614,10 @@ func RepoAssignment(ctx *Context) context.CancelFunc {
 		}
 	}
 
-	isHomeOrSettings := ctx.Link == ctx.Repo.RepoLink || ctx.Link == ctx.Repo.RepoLink+"/settings" || strings.HasPrefix(ctx.Link, ctx.Repo.RepoLink+"/settings/")
+	isHomeOrSettings := ctx.Link == ctx.Repo.RepoLink ||
+		ctx.Link == ctx.Repo.RepoLink+"/settings" ||
+		strings.HasPrefix(ctx.Link, ctx.Repo.RepoLink+"/settings/") ||
+		ctx.Link == ctx.Repo.RepoLink+"/-/migrate/status"
 
 	// Disable everything when the repo is being created
 	if ctx.Repo.Repository.IsBeingCreated() || ctx.Repo.Repository.IsBroken() {

services/context/repo.go

@@ -7,7 +7,7 @@
 				{{template "base/alert" .}}
 				<div class="home">
 					<div class="ui stackable middle very relaxed page grid">
-						<div id="repo_migrating" class="sixteen wide center aligned centered column" data-migrating-task-id="{{.MigrateTask.ID}}">
+						<div id="repo_migrating" class="sixteen wide center aligned centered column" data-migrating-repo-link="{{.Link}}">
 							<div>
 								<img src="{{AssetUrlPrefix}}/img/loading.png">
 							</div>

templates/repo/migrate/migrating.tmpl

@@ -1,19 +1,17 @@
 import {hideElem, showElem} from '../utils/dom.ts';
 import {GET, POST} from '../modules/fetch.ts';
 
-const {appSubUrl} = window.config;
-
 export function initRepoMigrationStatusChecker() {
   const repoMigrating = document.querySelector('#repo_migrating');
   if (!repoMigrating) return;
 
-  document.querySelector('#repo_migrating_retry').addEventListener('click', doMigrationRetry);
+  document.querySelector('#repo_migrating_retry')?.addEventListener('click', doMigrationRetry);
 
-  const task = repoMigrating.getAttribute('data-migrating-task-id');
+  const repoLink = repoMigrating.getAttribute('data-migrating-repo-link');
 
   // returns true if the refresh still needs to be called after a while
   const refresh = async () => {
-    const res = await GET(`${appSubUrl}/user/task/${task}`);
+    const res = await GET(`${repoLink}/-/migrate/status`);
     if (res.status !== 200) return true; // continue to refresh if network error occurs
 
     const data = await res.json();