From 5143ebb50746a70d0528c2ed6f7250e0c141b71c Mon Sep 17 00:00:00 2001
From: Gergely Nagy <forgejo@gergo.csillger.hu>
Date: Sat, 17 Feb 2024 10:20:10 +0100
Subject: [PATCH] Add rel="nofollow" to issue filter links

The issue filter links should not be crawled by search engines, because
they they only filter results, and contain nothing new, yet, they put a
considerable load on the server.

To stop - well behaving - search engines from following these links, add
a `rel="nofollow"` property to them. The same property is already
present on the archive download links, and plenty of other places.

Fixes #2361.

Signed-off-by: Gergely Nagy <forgejo@gergo.csillger.hu>
---
 templates/repo/issue/filter_list.tmpl | 56 +++++++++++++--------------
 tests/integration/issue_test.go       | 18 +++++++++
 2 files changed, 46 insertions(+), 28 deletions(-)

diff --git a/templates/repo/issue/filter_list.tmpl b/templates/repo/issue/filter_list.tmpl
index 511ef7f397..5aa9135efa 100644
--- a/templates/repo/issue/filter_list.tmpl
+++ b/templates/repo/issue/filter_list.tmpl
@@ -23,8 +23,8 @@
 		</div>
 		<span class="info">{{ctx.Locale.Tr "repo.issues.filter_label_exclude" | Safe}}</span>
 		<div class="divider"></div>
-		<a class="{{if .AllLabels}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_label_no_select"}}</a>
-		<a class="{{if .NoLabel}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels=0&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_label_select_no_label"}}</a>
+		<a rel="nofollow" class="{{if .AllLabels}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_label_no_select"}}</a>
+		<a rel="nofollow" class="{{if .NoLabel}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels=0&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_label_select_no_label"}}</a>
 		{{$previousExclusiveScope := "_no_scope"}}
 		{{range .Labels}}
 			{{$exclusiveScope := .ExclusiveScope}}
@@ -32,7 +32,7 @@
 				<div class="divider"></div>
 			{{end}}
 			{{$previousExclusiveScope = $exclusiveScope}}
-			<a class="item label-filter-item gt-df gt-ac" {{if .IsArchived}}data-is-archived{{end}} href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.QueryString}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}" data-label-id="{{.ID}}">
+			<a rel="nofollow" class="item label-filter-item gt-df gt-ac" {{if .IsArchived}}data-is-archived{{end}} href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.QueryString}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}" data-label-id="{{.ID}}">
 				{{if .IsExcluded}}
 					{{svg "octicon-circle-slash"}}
 				{{else if .IsSelected}}
@@ -62,13 +62,13 @@
 			<input type="text" placeholder="{{ctx.Locale.Tr "repo.issues.filter_milestone"}}">
 		</div>
 		<div class="divider"></div>
-		<a class="{{if not $.MilestoneID}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone=0&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_milestone_all"}}</a>
-		<a class="{{if $.MilestoneID}}{{if eq $.MilestoneID -1}}active selected {{end}}{{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone=-1&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_milestone_none"}}</a>
+		<a rel="nofollow" class="{{if not $.MilestoneID}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone=0&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_milestone_all"}}</a>
+		<a rel="nofollow" class="{{if $.MilestoneID}}{{if eq $.MilestoneID -1}}active selected {{end}}{{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone=-1&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_milestone_none"}}</a>
 		{{if .OpenMilestones}}
 			<div class="divider"></div>
 			<div class="header">{{ctx.Locale.Tr "repo.issues.filter_milestone_open"}}</div>
 			{{range .OpenMilestones}}
-			<a class="{{if $.MilestoneID}}{{if eq $.MilestoneID .ID}}active selected {{end}}{{end}}item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{.ID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">
+			<a rel="nofollow" class="{{if $.MilestoneID}}{{if eq $.MilestoneID .ID}}active selected {{end}}{{end}}item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{.ID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">
 				{{svg "octicon-milestone" 16 "mr-2"}}
 				{{.Name}}
 			</a>
@@ -78,7 +78,7 @@
 			<div class="divider"></div>
 			<div class="header">{{ctx.Locale.Tr "repo.issues.filter_milestone_closed"}}</div>
 			{{range .ClosedMilestones}}
-			<a class="{{if $.MilestoneID}}{{if eq $.MilestoneID .ID}}active selected {{end}}{{end}}item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{.ID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">
+			<a rel="nofollow" class="{{if $.MilestoneID}}{{if eq $.MilestoneID .ID}}active selected {{end}}{{end}}item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{.ID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">
 				{{svg "octicon-milestone" 16 "mr-2"}}
 				{{.Name}}
 			</a>
@@ -99,15 +99,15 @@
 			<i class="icon">{{svg "octicon-search" 16}}</i>
 			<input type="text" placeholder="{{ctx.Locale.Tr "repo.issues.filter_project"}}">
 		</div>
-		<a class="{{if not .ProjectID}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_project_all"}}</a>
-		<a class="{{if eq .ProjectID -1}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&project=-1&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_project_none"}}</a>
+		<a rel="nofollow" class="{{if not .ProjectID}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_project_all"}}</a>
+		<a rel="nofollow" class="{{if eq .ProjectID -1}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&project=-1&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_project_none"}}</a>
 		{{if .OpenProjects}}
 			<div class="divider"></div>
 			<div class="header">
 				{{ctx.Locale.Tr "repo.issues.new.open_projects"}}
 			</div>
 			{{range .OpenProjects}}
-				<a class="{{if $.ProjectID}}{{if eq $.ProjectID .ID}}active selected{{end}}{{end}} item gt-df" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&project={{.ID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">
+				<a rel="nofollow" class="{{if $.ProjectID}}{{if eq $.ProjectID .ID}}active selected{{end}}{{end}} item gt-df" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&project={{.ID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">
 					{{svg .IconName 18 "gt-mr-3 gt-shrink-0"}}<span class="gt-ellipsis">{{.Title}}</span>
 				</a>
 			{{end}}
@@ -118,7 +118,7 @@
 				{{ctx.Locale.Tr "repo.issues.new.closed_projects"}}
 			</div>
 			{{range .ClosedProjects}}
-				<a class="{{if $.ProjectID}}{{if eq $.ProjectID .ID}}active selected{{end}}{{end}} item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&project={{.ID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">
+				<a rel="nofollow" class="{{if $.ProjectID}}{{if eq $.ProjectID .ID}}active selected{{end}}{{end}} item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&project={{.ID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">
 					{{svg .IconName 18 "gt-mr-3"}}{{.Title}}
 				</a>
 			{{end}}
@@ -156,11 +156,11 @@
 			<i class="icon">{{svg "octicon-search" 16}}</i>
 			<input type="text" placeholder="{{ctx.Locale.Tr "repo.issues.filter_assignee"}}">
 		</div>
-		<a class="{{if not .AssigneeID}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_assginee_no_select"}}</a>
-		<a class="{{if eq .AssigneeID -1}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee=-1&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_assginee_no_assignee"}}</a>
+		<a rel="nofollow" class="{{if not .AssigneeID}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_assginee_no_select"}}</a>
+		<a rel="nofollow" class="{{if eq .AssigneeID -1}}active selected {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee=-1&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_assginee_no_assignee"}}</a>
 		<div class="divider"></div>
 		{{range .Assignees}}
-			<a class="{{if eq $.AssigneeID .ID}}active selected{{end}} item gt-df" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{.ID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">
+			<a rel="nofollow" class="{{if eq $.AssigneeID .ID}}active selected{{end}} item gt-df" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{.ID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">
 				{{ctx.AvatarUtils.Avatar . 20}}{{template "repo/search_name" .}}
 			</a>
 		{{end}}
@@ -175,14 +175,14 @@
 		</span>
 		{{svg "octicon-triangle-down" 14 "dropdown icon"}}
 		<div class="menu">
-			<a class="{{if eq .ViewType "all"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type=all&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_type.all_issues"}}</a>
-			<a class="{{if eq .ViewType "assigned"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type=assigned&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_type.assigned_to_you"}}</a>
-			<a class="{{if eq .ViewType "created_by"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type=created_by&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_type.created_by_you"}}</a>
+			<a rel="nofollow" class="{{if eq .ViewType "all"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type=all&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_type.all_issues"}}</a>
+			<a rel="nofollow" class="{{if eq .ViewType "assigned"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type=assigned&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_type.assigned_to_you"}}</a>
+			<a rel="nofollow" class="{{if eq .ViewType "created_by"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type=created_by&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_type.created_by_you"}}</a>
 			{{if .PageIsPullList}}
-				<a class="{{if eq .ViewType "review_requested"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type=review_requested&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_type.review_requested"}}</a>
-				<a class="{{if eq .ViewType "reviewed_by"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type=reviewed_by&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_type.reviewed_by_you"}}</a>
+				<a rel="nofollow" class="{{if eq .ViewType "review_requested"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type=review_requested&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_type.review_requested"}}</a>
+				<a rel="nofollow" class="{{if eq .ViewType "reviewed_by"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type=reviewed_by&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_type.reviewed_by_you"}}</a>
 			{{end}}
-			<a class="{{if eq .ViewType "mentioned"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type=mentioned&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_type.mentioning_you"}}</a>
+			<a rel="nofollow" class="{{if eq .ViewType "mentioned"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type=mentioned&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_type.mentioning_you"}}</a>
 		</div>
 	</div>
 {{end}}
@@ -194,13 +194,13 @@
 	</span>
 	{{svg "octicon-triangle-down" 14 "dropdown icon"}}
 	<div class="menu">
-		<a class="{{if or (eq .SortType "latest") (not .SortType)}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=latest&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.latest"}}</a>
-		<a class="{{if eq .SortType "oldest"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=oldest&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.oldest"}}</a>
-		<a class="{{if eq .SortType "recentupdate"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=recentupdate&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.recentupdate"}}</a>
-		<a class="{{if eq .SortType "leastupdate"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=leastupdate&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.leastupdate"}}</a>
-		<a class="{{if eq .SortType "mostcomment"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=mostcomment&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.mostcomment"}}</a>
-		<a class="{{if eq .SortType "leastcomment"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=leastcomment&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.leastcomment"}}</a>
-		<a class="{{if eq .SortType "nearduedate"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=nearduedate&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.nearduedate"}}</a>
-		<a class="{{if eq .SortType "farduedate"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=farduedate&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.farduedate"}}</a>
+		<a rel="nofollow" class="{{if or (eq .SortType "latest") (not .SortType)}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=latest&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.latest"}}</a>
+		<a rel="nofollow" class="{{if eq .SortType "oldest"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=oldest&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.oldest"}}</a>
+		<a rel="nofollow" class="{{if eq .SortType "recentupdate"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=recentupdate&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.recentupdate"}}</a>
+		<a rel="nofollow" class="{{if eq .SortType "leastupdate"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=leastupdate&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.leastupdate"}}</a>
+		<a rel="nofollow" class="{{if eq .SortType "mostcomment"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=mostcomment&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.mostcomment"}}</a>
+		<a rel="nofollow" class="{{if eq .SortType "leastcomment"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=leastcomment&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.leastcomment"}}</a>
+		<a rel="nofollow" class="{{if eq .SortType "nearduedate"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=nearduedate&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.nearduedate"}}</a>
+		<a rel="nofollow" class="{{if eq .SortType "farduedate"}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=farduedate&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.farduedate"}}</a>
 	</div>
 </div>
diff --git a/tests/integration/issue_test.go b/tests/integration/issue_test.go
index 268200be6f..7c00c4f958 100644
--- a/tests/integration/issue_test.go
+++ b/tests/integration/issue_test.go
@@ -1,4 +1,5 @@
 // Copyright 2017 The Gitea Authors. All rights reserved.
+// Copyright 2024 The Forgejo Authors c/o Codeberg e.V.. All rights reserved.
 // SPDX-License-Identifier: MIT
 
 package integration
@@ -797,3 +798,20 @@ func TestCommitRefComment(t *testing.T) {
 		assert.Contains(t, event, "referenced this issue")
 	})
 }
+
+func TestIssueFilterNoFollow(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	req := NewRequest(t, "GET", "/user2/repo1/issues")
+	resp := MakeRequest(t, req, http.StatusOK)
+	htmlDoc := NewHTMLParser(t, resp.Body)
+
+	// Check that every link in the filter list has rel="nofollow".
+	filterLinks := htmlDoc.Find(".issue-list-toolbar-right a[href*=\"/issues?q=\"]")
+	assert.True(t, filterLinks.Length() > 0)
+	filterLinks.Each(func(i int, link *goquery.Selection) {
+		rel, has := link.Attr("rel")
+		assert.True(t, has)
+		assert.Equal(t, "nofollow", rel)
+	})
+}