70 lines
1.6 KiB
Go
70 lines
1.6 KiB
Go
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// Copyright 2022 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package sitemap
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import (
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"bytes"
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"encoding/xml"
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"fmt"
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"io"
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"time"
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)
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// sitemapFileLimit contains the maximum size of a sitemap file
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const sitemapFileLimit = 50 * 1024 * 1024
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// Url represents a single sitemap entry
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type URL struct {
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URL string `xml:"loc"`
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LastMod *time.Time `xml:"lastmod,omitempty"`
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}
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// SitemapUrl represents a sitemap
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type Sitemap struct {
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XMLName xml.Name
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Namespace string `xml:"xmlns,attr"`
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URLs []URL `xml:"url"`
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}
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// NewSitemap creates a sitemap
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func NewSitemap() *Sitemap {
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return &Sitemap{
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XMLName: xml.Name{Local: "urlset"},
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Namespace: "http://www.sitemaps.org/schemas/sitemap/0.9",
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}
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}
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// NewSitemap creates a sitemap index.
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func NewSitemapIndex() *Sitemap {
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return &Sitemap{
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XMLName: xml.Name{Local: "sitemapindex"},
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Namespace: "http://www.sitemaps.org/schemas/sitemap/0.9",
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}
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}
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// Add adds a URL to the sitemap
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func (s *Sitemap) Add(u URL) {
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s.URLs = append(s.URLs, u)
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}
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// Write writes the sitemap to a response
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func (s *Sitemap) WriteTo(w io.Writer) (int64, error) {
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if len(s.URLs) > 50000 {
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return 0, fmt.Errorf("The sitemap contains too many URLs: %d", len(s.URLs))
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}
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buf := bytes.NewBufferString(xml.Header)
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if err := xml.NewEncoder(buf).Encode(s); err != nil {
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return 0, err
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}
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if err := buf.WriteByte('\n'); err != nil {
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return 0, err
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}
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if buf.Len() > sitemapFileLimit {
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return 0, fmt.Errorf("The sitemap is too big: %d", buf.Len())
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}
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return buf.WriteTo(w)
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}
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