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zeekayandHanzo Dev
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Source files keep their SPDX-License-Identifier and Hanzo copyright line; the Gitea, Gogs and LFS Test Server copyrights they used to repeat now live once in NOTICE, alongside LICENSE. The header lint accepts any copyright line above the SPDX line, so it no longer demands an upstream one. Co-authored-by: Hanzo Dev <[email protected]>
87 lines
2.1 KiB
Go
87 lines
2.1 KiB
Go
// Copyright 2026 Hanzo AI, Inc. All rights reserved.
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// SPDX-License-Identifier: MIT
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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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const (
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sitemapFileLimit = 50 * 1024 * 1024 // the maximum size of a sitemap file
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urlsLimit = 50000
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schemaURL = "http://www.sitemaps.org/schemas/sitemap/0.9"
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urlsetName = "urlset"
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sitemapindexName = "sitemapindex"
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)
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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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// Sitemap 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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Sitemaps []URL `xml:"sitemap"`
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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: urlsetName},
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Namespace: schemaURL,
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}
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}
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// NewSitemapIndex 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: sitemapindexName},
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Namespace: schemaURL,
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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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if s.XMLName.Local == sitemapindexName {
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s.Sitemaps = append(s.Sitemaps, u)
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} else {
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s.URLs = append(s.URLs, u)
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}
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}
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// WriteTo writes the sitemap to a response
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func (s *Sitemap) WriteTo(w io.Writer) (int64, error) {
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if l := len(s.URLs); l > urlsLimit {
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return 0, fmt.Errorf("sitemap contains %d URLs, but only %d are allowed", l, urlsLimit)
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}
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if l := len(s.Sitemaps); l > urlsLimit {
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return 0, fmt.Errorf("sitemap contains %d sub-sitemaps, but only %d are allowed", l, urlsLimit)
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}
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buf := bytes.NewBufferString(xml.Header)
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encoder := xml.NewEncoder(buf)
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defer encoder.Close()
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if err := encoder.Encode(s); err != nil {
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return 0, err
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}
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_ = encoder.Flush()
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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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// FIXME: such limit is not right, the content has been written, it would have already caused OOM
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if buf.Len() > sitemapFileLimit {
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return 0, fmt.Errorf("sitemap has %d bytes, but only %d are allowed", buf.Len(), sitemapFileLimit)
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}
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return buf.WriteTo(w)
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}
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