Adding upstream version 9.0.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

2 files changed, 249 insertions, 0 deletions

diff --git a/modules/sitemap/sitemap.go b/modules/sitemap/sitemap.go
new file mode 100644
index 0000000..280ca1d
--- /dev/null
+++ b/modules/sitemap/sitemap.go
@@ -0,0 +1,82 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package sitemap
+
+import (
+	"bytes"
+	"encoding/xml"
+	"fmt"
+	"io"
+	"time"
+)
+
+const (
+	sitemapFileLimit = 50 * 1024 * 1024 // the maximum size of a sitemap file
+	urlsLimit        = 50000
+
+	schemaURL        = "http://www.sitemaps.org/schemas/sitemap/0.9"
+	urlsetName       = "urlset"
+	sitemapindexName = "sitemapindex"
+)
+
+// URL represents a single sitemap entry
+type URL struct {
+	URL     string     `xml:"loc"`
+	LastMod *time.Time `xml:"lastmod,omitempty"`
+}
+
+// Sitemap represents a sitemap
+type Sitemap struct {
+	XMLName   xml.Name
+	Namespace string `xml:"xmlns,attr"`
+
+	URLs     []URL `xml:"url"`
+	Sitemaps []URL `xml:"sitemap"`
+}
+
+// NewSitemap creates a sitemap
+func NewSitemap() *Sitemap {
+	return &Sitemap{
+		XMLName:   xml.Name{Local: urlsetName},
+		Namespace: schemaURL,
+	}
+}
+
+// NewSitemapIndex creates a sitemap index.
+func NewSitemapIndex() *Sitemap {
+	return &Sitemap{
+		XMLName:   xml.Name{Local: sitemapindexName},
+		Namespace: schemaURL,
+	}
+}
+
+// Add adds a URL to the sitemap
+func (s *Sitemap) Add(u URL) {
+	if s.XMLName.Local == sitemapindexName {
+		s.Sitemaps = append(s.Sitemaps, u)
+	} else {
+		s.URLs = append(s.URLs, u)
+	}
+}
+
+// WriteTo writes the sitemap to a response
+func (s *Sitemap) WriteTo(w io.Writer) (int64, error) {
+	if l := len(s.URLs); l > urlsLimit {
+		return 0, fmt.Errorf("The sitemap contains %d URLs, but only %d are allowed", l, urlsLimit)
+	}
+	if l := len(s.Sitemaps); l > urlsLimit {
+		return 0, fmt.Errorf("The sitemap contains %d sub-sitemaps, but only %d are allowed", l, urlsLimit)
+	}
+	buf := bytes.NewBufferString(xml.Header)
+	if err := xml.NewEncoder(buf).Encode(s); err != nil {
+		return 0, err
+	}
+	if err := buf.WriteByte('\n'); err != nil {
+		return 0, err
+	}
+	if buf.Len() > sitemapFileLimit {
+		return 0, fmt.Errorf("The sitemap has %d bytes, but only %d are allowed", buf.Len(), sitemapFileLimit)
+	}
+	return buf.WriteTo(w)
+}
diff --git a/modules/sitemap/sitemap_test.go b/modules/sitemap/sitemap_test.go
new file mode 100644
index 0000000..39a2178
--- /dev/null
+++ b/modules/sitemap/sitemap_test.go
@@ -0,0 +1,167 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package sitemap
+
+import (
+	"bytes"
+	"encoding/xml"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestNewSitemap(t *testing.T) {
+	ts := time.Unix(1651322008, 0).UTC()
+
+	tests := []struct {
+		name    string
+		urls    []URL
+		want    string
+		wantErr string
+	}{
+		{
+			name: "empty",
+			urls: []URL{},
+			want: xml.Header + `<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">` +
+				"" +
+				"</urlset>\n",
+		},
+		{
+			name: "regular",
+			urls: []URL{
+				{URL: "https://gitea.io/test1", LastMod: &ts},
+			},
+			want: xml.Header + `<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">` +
+				"<url><loc>https://gitea.io/test1</loc><lastmod>2022-04-30T12:33:28Z</lastmod></url>" +
+				"</urlset>\n",
+		},
+		{
+			name: "without lastmod",
+			urls: []URL{
+				{URL: "https://gitea.io/test1"},
+			},
+			want: xml.Header + `<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">` +
+				"<url><loc>https://gitea.io/test1</loc></url>" +
+				"</urlset>\n",
+		},
+		{
+			name: "multiple",
+			urls: []URL{
+				{URL: "https://gitea.io/test1", LastMod: &ts},
+				{URL: "https://gitea.io/test2", LastMod: nil},
+			},
+			want: xml.Header + `<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">` +
+				"<url><loc>https://gitea.io/test1</loc><lastmod>2022-04-30T12:33:28Z</lastmod></url>" +
+				"<url><loc>https://gitea.io/test2</loc></url>" +
+				"</urlset>\n",
+		},
+		{
+			name:    "too many urls",
+			urls:    make([]URL, 50001),
+			wantErr: "The sitemap contains 50001 URLs, but only 50000 are allowed",
+		},
+		{
+			name: "too big file",
+			urls: []URL{
+				{URL: strings.Repeat("b", 50*1024*1024+1)},
+			},
+			wantErr: "The sitemap has 52428932 bytes, but only 52428800 are allowed",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			s := NewSitemap()
+			for _, url := range tt.urls {
+				s.Add(url)
+			}
+			buf := &bytes.Buffer{}
+			_, err := s.WriteTo(buf)
+			if tt.wantErr != "" {
+				assert.EqualError(t, err, tt.wantErr)
+			} else {
+				require.NoError(t, err)
+				assert.Equalf(t, tt.want, buf.String(), "NewSitemap()")
+			}
+		})
+	}
+}
+
+func TestNewSitemapIndex(t *testing.T) {
+	ts := time.Unix(1651322008, 0).UTC()
+
+	tests := []struct {
+		name    string
+		urls    []URL
+		want    string
+		wantErr string
+	}{
+		{
+			name: "empty",
+			urls: []URL{},
+			want: xml.Header + `<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">` +
+				"" +
+				"</sitemapindex>\n",
+		},
+		{
+			name: "regular",
+			urls: []URL{
+				{URL: "https://gitea.io/test1", LastMod: &ts},
+			},
+			want: xml.Header + `<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">` +
+				"<sitemap><loc>https://gitea.io/test1</loc><lastmod>2022-04-30T12:33:28Z</lastmod></sitemap>" +
+				"</sitemapindex>\n",
+		},
+		{
+			name: "without lastmod",
+			urls: []URL{
+				{URL: "https://gitea.io/test1"},
+			},
+			want: xml.Header + `<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">` +
+				"<sitemap><loc>https://gitea.io/test1</loc></sitemap>" +
+				"</sitemapindex>\n",
+		},
+		{
+			name: "multiple",
+			urls: []URL{
+				{URL: "https://gitea.io/test1", LastMod: &ts},
+				{URL: "https://gitea.io/test2", LastMod: nil},
+			},
+			want: xml.Header + `<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">` +
+				"<sitemap><loc>https://gitea.io/test1</loc><lastmod>2022-04-30T12:33:28Z</lastmod></sitemap>" +
+				"<sitemap><loc>https://gitea.io/test2</loc></sitemap>" +
+				"</sitemapindex>\n",
+		},
+		{
+			name:    "too many sitemaps",
+			urls:    make([]URL, 50001),
+			wantErr: "The sitemap contains 50001 sub-sitemaps, but only 50000 are allowed",
+		},
+		{
+			name: "too big file",
+			urls: []URL{
+				{URL: strings.Repeat("b", 50*1024*1024+1)},
+			},
+			wantErr: "The sitemap has 52428952 bytes, but only 52428800 are allowed",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			s := NewSitemapIndex()
+			for _, url := range tt.urls {
+				s.Add(url)
+			}
+			buf := &bytes.Buffer{}
+			_, err := s.WriteTo(buf)
+			if tt.wantErr != "" {
+				assert.EqualError(t, err, tt.wantErr)
+			} else {
+				require.NoError(t, err)
+				assert.Equalf(t, tt.want, buf.String(), "NewSitemapIndex()")
+			}
+		})
+	}
+}