Use link in UI which returned a relative url but not html_url which contains an absolute url (go-gitea#21986)

partially fix go-gitea#19345

This PR add some `Link` methods for different objects. The `Link`
methods are not different from `HTMLURL`, they are lack of the absolute
URL. And most of UI `HTMLURL` have been replaced to `Link` so that users
can visit them from a different domain or IP.

This PR also introduces a new javascript configuration
`window.config.reqAppUrl` which is different from `appUrl` which is
still an absolute url but the domain has been replaced to the current
requested domain.

Author: lunny

models/activities/action.go

@@ -223,6 +223,49 @@ func (a *Action) GetRepoAbsoluteLink() string {
 	return setting.AppURL + url.PathEscape(a.GetRepoUserName()) + "/" + url.PathEscape(a.GetRepoName())
 }
 
+// GetCommentHTMLURL returns link to action comment.
+func (a *Action) GetCommentHTMLURL() string {
+	return a.getCommentHTMLURL(db.DefaultContext)
+}
+
+func (a *Action) loadComment(ctx context.Context) (err error) {
+	if a.CommentID == 0 || a.Comment != nil {
+		return nil
+	}
+	a.Comment, err = issues_model.GetCommentByID(ctx, a.CommentID)
+	return err
+}
+
+func (a *Action) getCommentHTMLURL(ctx context.Context) string {
+	if a == nil {
+		return "#"
+	}
+	_ = a.loadComment(ctx)
+	if a.Comment != nil {
+		return a.Comment.HTMLURL()
+	}
+	if len(a.GetIssueInfos()) == 0 {
+		return "#"
+	}
+	// Return link to issue
+	issueIDString := a.GetIssueInfos()[0]
+	issueID, err := strconv.ParseInt(issueIDString, 10, 64)
+	if err != nil {
+		return "#"
+	}
+
+	issue, err := issues_model.GetIssueByID(ctx, issueID)
+	if err != nil {
+		return "#"
+	}
+
+	if err = issue.LoadRepo(ctx); err != nil {
+		return "#"
+	}
+
+	return issue.HTMLURL()
+}
+
 // GetCommentLink returns link to action comment.
 func (a *Action) GetCommentLink() string {
 	return a.getCommentLink(db.DefaultContext)
@@ -232,11 +275,9 @@ func (a *Action) getCommentLink(ctx context.Context) string {
 	if a == nil {
 		return "#"
 	}
-	if a.Comment == nil && a.CommentID != 0 {
-		a.Comment, _ = issues_model.GetCommentByID(ctx, a.CommentID)
-	}
+	_ = a.loadComment(ctx)
 	if a.Comment != nil {
-		return a.Comment.HTMLURL()
+		return a.Comment.Link()
 	}
 	if len(a.GetIssueInfos()) == 0 {
 		return "#"
@@ -257,7 +298,7 @@ func (a *Action) getCommentLink(ctx context.Context) string {
 		return "#"
 	}
 
-	return issue.HTMLURL()
+	return issue.Link()
 }
 
 // GetBranch returns the action's repository branch.

models/activities/action_test.go

@@ -36,7 +36,7 @@ func TestAction_GetRepoLink(t *testing.T) {
 	expected := path.Join(setting.AppSubURL, owner.Name, repo.Name)
 	assert.Equal(t, expected, action.GetRepoLink())
 	assert.Equal(t, repo.HTMLURL(), action.GetRepoAbsoluteLink())
-	assert.Equal(t, comment.HTMLURL(), action.GetCommentLink())
+	assert.Equal(t, comment.HTMLURL(), action.GetCommentHTMLURL())
 }
 
 func TestGetFeeds(t *testing.T) {

models/activities/notification.go

@@ -459,6 +459,22 @@ func (n *Notification) HTMLURL() string {
 	return ""
 }
 
+// Link formats a relative URL-string to the notification
+func (n *Notification) Link() string {
+	switch n.Source {
+	case NotificationSourceIssue, NotificationSourcePullRequest:
+		if n.Comment != nil {
+			return n.Comment.Link()
+		}
+		return n.Issue.Link()
+	case NotificationSourceCommit:
+		return n.Repository.Link() + "/commit/" + url.PathEscape(n.CommitID)
+	case NotificationSourceRepository:
+		return n.Repository.Link()
+	}
+	return ""
+}
+
 // APIURL formats a URL-string to the notification
 func (n *Notification) APIURL() string {
 	return setting.AppURL + "api/v1/notifications/threads/" + strconv.FormatInt(n.ID, 10)

models/issues/comment.go

@@ -391,21 +391,40 @@ func (c *Comment) HTMLURL() string {
 		log.Error("loadRepo(%d): %v", c.Issue.RepoID, err)
 		return ""
 	}
+	return c.Issue.HTMLURL() + c.hashLink()
+}
+
+// Link formats a relative URL-string to the issue-comment
+func (c *Comment) Link() string {
+	err := c.LoadIssue(db.DefaultContext)
+	if err != nil { // Silently dropping errors :unamused:
+		log.Error("LoadIssue(%d): %v", c.IssueID, err)
+		return ""
+	}
+	err = c.Issue.LoadRepo(db.DefaultContext)
+	if err != nil { // Silently dropping errors :unamused:
+		log.Error("loadRepo(%d): %v", c.Issue.RepoID, err)
+		return ""
+	}
+	return c.Issue.Link() + c.hashLink()
+}
+
+func (c *Comment) hashLink() string {
 	if c.Type == CommentTypeCode {
 		if c.ReviewID == 0 {
-			return fmt.Sprintf("%s/files#%s", c.Issue.HTMLURL(), c.HashTag())
+			return "/files#" + c.HashTag()
 		}
 		if c.Review == nil {
 			if err := c.LoadReview(); err != nil {
 				log.Warn("LoadReview(%d): %v", c.ReviewID, err)
-				return fmt.Sprintf("%s/files#%s", c.Issue.HTMLURL(), c.HashTag())
+				return "/files#" + c.HashTag()
 			}
 		}
 		if c.Review.Type <= ReviewTypePending {
-			return fmt.Sprintf("%s/files#%s", c.Issue.HTMLURL(), c.HashTag())
+			return "/files#" + c.HashTag()
 		}
 	}
-	return fmt.Sprintf("%s#%s", c.Issue.HTMLURL(), c.HashTag())
+	return "#" + c.HashTag()
 }
 
 // APIURL formats a API-string to the issue-comment
@@ -708,8 +727,8 @@ func (c *Comment) UnsignedLine() uint64 {
 	return uint64(c.Line)
 }
 
-// CodeCommentURL returns the url to a comment in code
-func (c *Comment) CodeCommentURL() string {
+// CodeCommentLink returns the url to a comment in code
+func (c *Comment) CodeCommentLink() string {
 	err := c.LoadIssue(db.DefaultContext)
 	if err != nil { // Silently dropping errors :unamused:
 		log.Error("LoadIssue(%d): %v", c.IssueID, err)
@@ -720,7 +739,7 @@ func (c *Comment) CodeCommentURL() string {
 		log.Error("loadRepo(%d): %v", c.Issue.RepoID, err)
 		return ""
 	}
-	return fmt.Sprintf("%s/files#%s", c.Issue.HTMLURL(), c.HashTag())
+	return fmt.Sprintf("%s/files#%s", c.Issue.Link(), c.HashTag())
 }
 
 // LoadPushCommits Load push commits

models/issues/issue.go

@@ -419,7 +419,7 @@ func (issue *Issue) HTMLURL() string {
 	return fmt.Sprintf("%s/%s/%d", issue.Repo.HTMLURL(), path, issue.Index)
 }
 
-// Link returns the Link URL to this issue.
+// Link returns the issue's relative URL.
 func (issue *Issue) Link() string {
 	var path string
 	if issue.IsPull {

models/issues/pull.go

@@ -759,20 +759,20 @@ func GetPullRequestsByHeadBranch(ctx context.Context, headBranch string, headRep
 	return prs, nil
 }
 
-// GetBaseBranchHTMLURL returns the HTML URL of the base branch
-func (pr *PullRequest) GetBaseBranchHTMLURL() string {
+// GetBaseBranchLink returns the relative URL of the base branch
+func (pr *PullRequest) GetBaseBranchLink() string {
 	if err := pr.LoadBaseRepo(db.DefaultContext); err != nil {
 		log.Error("LoadBaseRepo: %v", err)
 		return ""
 	}
 	if pr.BaseRepo == nil {
 		return ""
 	}
-	return pr.BaseRepo.HTMLURL() + "/src/branch/" + util.PathEscapeSegments(pr.BaseBranch)
+	return pr.BaseRepo.Link() + "/src/branch/" + util.PathEscapeSegments(pr.BaseBranch)
 }
 
-// GetHeadBranchHTMLURL returns the HTML URL of the head branch
-func (pr *PullRequest) GetHeadBranchHTMLURL() string {
+// GetHeadBranchLink returns the relative URL of the head branch
+func (pr *PullRequest) GetHeadBranchLink() string {
 	if pr.Flow == PullRequestFlowAGit {
 		return ""
 	}
@@ -784,7 +784,7 @@ func (pr *PullRequest) GetHeadBranchHTMLURL() string {
 	if pr.HeadRepo == nil {
 		return ""
 	}
-	return pr.HeadRepo.HTMLURL() + "/src/branch/" + util.PathEscapeSegments(pr.HeadBranch)
+	return pr.HeadRepo.Link() + "/src/branch/" + util.PathEscapeSegments(pr.HeadBranch)
 }
 
 // UpdateAllowEdits update if PR can be edited from maintainers

models/packages/descriptor.go

@@ -65,7 +65,7 @@ type PackageFileDescriptor struct {
 
 // PackageWebLink returns the package web link
 func (pd *PackageDescriptor) PackageWebLink() string {
-	return fmt.Sprintf("%s/-/packages/%s/%s", pd.Owner.HTMLURL(), string(pd.Package.Type), url.PathEscape(pd.Package.LowerName))
+	return fmt.Sprintf("%s/-/packages/%s/%s", pd.Owner.HomeLink(), string(pd.Package.Type), url.PathEscape(pd.Package.LowerName))
 }
 
 // FullWebLink returns the package version web link

models/project/project.go

@@ -116,6 +116,7 @@ func (p *Project) LoadRepo(ctx context.Context) (err error) {
 	return err
 }
 
+// Link returns the project's relative URL.
 func (p *Project) Link() string {
 	if p.OwnerID > 0 {
 		err := p.LoadOwner(db.DefaultContext)

models/repo/release.go

@@ -130,6 +130,11 @@ func (r *Release) HTMLURL() string {
 	return r.Repo.HTMLURL() + "/releases/tag/" + util.PathEscapeSegments(r.TagName)
 }
 
+// Link the relative url for a release on the web UI. release must have attributes loaded
+func (r *Release) Link() string {
+	return r.Repo.Link() + "/releases/tag/" + util.PathEscapeSegments(r.TagName)
+}
+
 // IsReleaseExist returns true if release with given tag name already exists.
 func IsReleaseExist(ctx context.Context, repoID int64, tagName string) (bool, error) {
 	if len(tagName) == 0 {

models/repo/repo.go

@@ -480,7 +480,7 @@ func (repo *Repository) RepoPath() string {
 	return RepoPath(repo.OwnerName, repo.Name)
 }
 
-// Link returns the repository link
+// Link returns the repository relative url
 func (repo *Repository) Link() string {
 	return setting.AppSubURL + "/" + url.PathEscape(repo.OwnerName) + "/" + url.PathEscape(repo.Name)
 }