From f4958b4f1e10113be2bc8d373afdd7b1d4fe0d72 Mon Sep 17 00:00:00 2001
From: Velka <59120414+Velka-DEV@users.noreply.github.com>
Date: Tue, 2 Jan 2024 09:29:35 +0100
Subject: [PATCH] feat: custom link parser (#458)

* feat: allow custom url parsers

Previously named LinkAdder

* fix: removed incorrect type check

* feat: added sitemap url parser

* tests: added sitemap url parsing test

* chore: added readme documentation for custom url parsers

* Update README.md

* tests: added more consistent tests with sitemapindex and sitemap childs

* Fix styling

* chore: added documentation for the built-in SitemapUrlParser

---------

Co-authored-by: Freek Van der Herten <freek@spatie.be>
Co-authored-by: Velka-DEV <Velka-DEV@users.noreply.github.com>
---
 README.md                                     |  20 +
 src/CrawlObservers/CrawlObserver.php          |   8 +-
 src/CrawlUrl.php                              |   4 +-
 src/Crawler.php                               |  19 +-
 src/Handlers/CrawlRequestFulfilled.php        |   9 +-
 src/ResponseWithCachedBody.php                |   2 +-
 .../LinkUrlParser.php}                        |   9 +-
 src/UrlParsers/SitemapUrlParser.php           |  89 +++
 src/UrlParsers/UrlParser.php                  |  13 +
 tests/CrawlObserverCollectionTest.php         |   8 +-
 tests/SitemapUrlParserTest.php                |  46 ++
 tests/TestClasses/CrawlLogger.php             |  10 +-
 tests/server/package-lock.json                | 740 ++++++++++++------
 tests/server/server.js                        |  72 ++
 14 files changed, 777 insertions(+), 272 deletions(-)
 rename src/{LinkAdder.php => UrlParsers/LinkUrlParser.php} (94%)
 create mode 100644 src/UrlParsers/SitemapUrlParser.php
 create mode 100644 src/UrlParsers/UrlParser.php
 create mode 100644 tests/SitemapUrlParserTest.php

diff --git a/README.md b/README.md
index d94a555a..818c0716 100644
--- a/README.md
+++ b/README.md
@@ -153,6 +153,26 @@ This package comes with three `CrawlProfiles` out of the box:
 - `CrawlInternalUrls`: this profile will only crawl the internal urls on the pages of a host.
 - `CrawlSubdomains`: this profile will only crawl the internal urls and its subdomains on the pages of a host.
 
+### Custom link extraction
+
+You can customize how links are extracted from a page by passing a custom `UrlParser` to the crawler.
+
+```php
+Crawler::create()
+    ->setUrlParserClass(<class that implements \Spatie\Crawler\UrlParsers\UrlParser>::class)
+    ...
+```
+
+By default, the `LinkUrlParser` is used. This parser will extract all links from the `href` attribute of `a` tags.
+
+There is also a built-in `SitemapUrlParser` that will extract & crawl all links from a sitemap. It does support sitemap index files.
+
+```php
+Crawler::create()
+    ->setUrlParserClass(SitemapUrlParser::class)
+    ...
+```
+
 ### Ignoring robots.txt and robots meta
 
 By default, the crawler will respect robots data. It is possible to disable these checks like so:
diff --git a/src/CrawlObservers/CrawlObserver.php b/src/CrawlObservers/CrawlObserver.php
index 8cd4ac4e..92a5c97a 100644
--- a/src/CrawlObservers/CrawlObserver.php
+++ b/src/CrawlObservers/CrawlObserver.php
@@ -21,8 +21,8 @@ public function willCrawl(UriInterface $url, ?string $linkText): void
     public function crawled(
         UriInterface $url,
         ResponseInterface $response,
-        UriInterface $foundOnUrl = null,
-        string $linkText = null,
+        ?UriInterface $foundOnUrl = null,
+        ?string $linkText = null,
     ): void {
     }
 
@@ -32,8 +32,8 @@ public function crawled(
     public function crawlFailed(
         UriInterface $url,
         RequestException $requestException,
-        UriInterface $foundOnUrl = null,
-        string $linkText = null,
+        ?UriInterface $foundOnUrl = null,
+        ?string $linkText = null,
     ): void {
     }
 
diff --git a/src/CrawlUrl.php b/src/CrawlUrl.php
index a2596739..c52d43ea 100644
--- a/src/CrawlUrl.php
+++ b/src/CrawlUrl.php
@@ -16,9 +16,9 @@ class CrawlUrl
 
     public static function create(
         UriInterface $url,
-        UriInterface $foundOnUrl = null,
+        ?UriInterface $foundOnUrl = null,
         $id = null,
-        string $linkText = null,
+        ?string $linkText = null,
     ): static {
         $static = new static($url, $foundOnUrl, linkText: $linkText);
 
diff --git a/src/Crawler.php b/src/Crawler.php
index 996fe979..547d3b03 100644
--- a/src/Crawler.php
+++ b/src/Crawler.php
@@ -19,6 +19,7 @@
 use Spatie\Crawler\Exceptions\InvalidCrawlRequestHandler;
 use Spatie\Crawler\Handlers\CrawlRequestFailed;
 use Spatie\Crawler\Handlers\CrawlRequestFulfilled;
+use Spatie\Crawler\UrlParsers\LinkUrlParser;
 use Spatie\Robots\RobotsTxt;
 use Tree\Node\Node;
 
@@ -62,6 +63,8 @@ class Crawler
 
     protected string $crawlRequestFailedClass;
 
+    protected string $urlParserClass;
+
     protected int $delayBetweenRequests = 0;
 
     protected array $allowedMimeTypes = [];
@@ -102,6 +105,8 @@ public function __construct(
         $this->crawlRequestFulfilledClass = CrawlRequestFulfilled::class;
 
         $this->crawlRequestFailedClass = CrawlRequestFailed::class;
+
+        $this->urlParserClass = LinkUrlParser::class;
     }
 
     public function getDefaultScheme(): string
@@ -345,6 +350,18 @@ public function setCrawlFailedHandlerClass(string $crawlRequestFailedClass): sel
         return $this;
     }
 
+    public function setUrlParserClass(string $urlParserClass): self
+    {
+        $this->urlParserClass = $urlParserClass;
+
+        return $this;
+    }
+
+    public function getUrlParserClass(): string
+    {
+        return $this->urlParserClass;
+    }
+
     public function setBrowsershot(Browsershot $browsershot)
     {
         $this->browsershot = $browsershot;
@@ -430,7 +447,7 @@ public function startCrawling(UriInterface|string $baseUrl)
         }
     }
 
-    public function addToDepthTree(UriInterface $url, UriInterface $parentUrl, Node $node = null): ?Node
+    public function addToDepthTree(UriInterface $url, UriInterface $parentUrl, ?Node $node = null): ?Node
     {
         if (is_null($this->maximumDepth)) {
             return new Node((string) $url);
diff --git a/src/Handlers/CrawlRequestFulfilled.php b/src/Handlers/CrawlRequestFulfilled.php
index 130e6f7b..4f45b491 100644
--- a/src/Handlers/CrawlRequestFulfilled.php
+++ b/src/Handlers/CrawlRequestFulfilled.php
@@ -13,16 +13,17 @@
 use Spatie\Crawler\CrawlerRobots;
 use Spatie\Crawler\CrawlProfiles\CrawlSubdomains;
 use Spatie\Crawler\CrawlUrl;
-use Spatie\Crawler\LinkAdder;
 use Spatie\Crawler\ResponseWithCachedBody;
+use Spatie\Crawler\UrlParsers\UrlParser;
 
 class CrawlRequestFulfilled
 {
-    protected LinkAdder $linkAdder;
+    protected UrlParser $urlParser;
 
     public function __construct(protected Crawler $crawler)
     {
-        $this->linkAdder = new LinkAdder($this->crawler);
+        $urlParserClass = $this->crawler->getUrlParserClass();
+        $this->urlParser = new $urlParserClass($this->crawler);
     }
 
     public function __invoke(ResponseInterface $response, $index)
@@ -62,7 +63,7 @@ public function __invoke(ResponseInterface $response, $index)
 
         $baseUrl = $this->getBaseUrl($response, $crawlUrl);
 
-        $this->linkAdder->addFromHtml($body, $baseUrl);
+        $this->urlParser->addFromHtml($body, $baseUrl);
 
         usleep($this->crawler->getDelayBetweenRequests());
     }
diff --git a/src/ResponseWithCachedBody.php b/src/ResponseWithCachedBody.php
index b7318da4..a44fd15d 100644
--- a/src/ResponseWithCachedBody.php
+++ b/src/ResponseWithCachedBody.php
@@ -20,7 +20,7 @@ public static function fromGuzzlePsr7Response(ResponseInterface $response): stat
         );
     }
 
-    public function setCachedBody(string $body = null): void
+    public function setCachedBody(?string $body = null): void
     {
         $this->cachedBody = $body;
     }
diff --git a/src/LinkAdder.php b/src/UrlParsers/LinkUrlParser.php
similarity index 94%
rename from src/LinkAdder.php
rename to src/UrlParsers/LinkUrlParser.php
index e2fcad92..69684cab 100644
--- a/src/LinkAdder.php
+++ b/src/UrlParsers/LinkUrlParser.php
@@ -1,15 +1,18 @@
 <?php
 
-namespace Spatie\Crawler;
+namespace Spatie\Crawler\UrlParsers;
 
 use Illuminate\Support\Collection;
 use InvalidArgumentException;
 use Psr\Http\Message\UriInterface;
+use Spatie\Crawler\Crawler;
+use Spatie\Crawler\CrawlUrl;
+use Spatie\Crawler\Url;
 use Symfony\Component\DomCrawler\Crawler as DomCrawler;
 use Symfony\Component\DomCrawler\Link;
 use Tree\Node\Node;
 
-class LinkAdder
+class LinkUrlParser implements UrlParser
 {
     protected Crawler $crawler;
 
@@ -66,7 +69,7 @@ protected function extractLinksFromHtml(string $html, UriInterface $foundOnUrl):
 
                     return new Url($link->getUri(), $linkText);
                 } catch (InvalidArgumentException $exception) {
-                    return;
+                    return null;
                 }
             })
             ->filter();
diff --git a/src/UrlParsers/SitemapUrlParser.php b/src/UrlParsers/SitemapUrlParser.php
new file mode 100644
index 00000000..04bf47ad
--- /dev/null
+++ b/src/UrlParsers/SitemapUrlParser.php
@@ -0,0 +1,89 @@
+<?php
+
+namespace Spatie\Crawler\UrlParsers;
+
+use Illuminate\Support\Collection;
+use InvalidArgumentException;
+use Psr\Http\Message\UriInterface;
+use Spatie\Crawler\Crawler;
+use Spatie\Crawler\CrawlUrl;
+use Spatie\Crawler\Url;
+use Symfony\Component\DomCrawler\Crawler as DomCrawler;
+use Tree\Node\Node;
+
+class SitemapUrlParser implements UrlParser
+{
+    protected Crawler $crawler;
+
+    public function __construct(Crawler $crawler)
+    {
+        $this->crawler = $crawler;
+    }
+
+    public function addFromHtml(string $html, UriInterface $foundOnUrl): void
+    {
+        $allLinks = $this->extractLinksFromHtml($html, $foundOnUrl);
+
+        collect($allLinks)
+            ->filter(fn (Url $url) => $this->hasCrawlableScheme($url))
+            ->map(fn (Url $url) => $this->normalizeUrl($url))
+            ->filter(function (Url $url) use ($foundOnUrl) {
+                if (! $node = $this->crawler->addToDepthTree($url, $foundOnUrl)) {
+                    return false;
+                }
+
+                return $this->shouldCrawl($node);
+            })
+            ->filter(fn (Url $url) => ! str_contains($url->getPath(), '/tel:'))
+            ->each(function (Url $url) use ($foundOnUrl) {
+                $crawlUrl = CrawlUrl::create($url, $foundOnUrl, linkText: $url->linkText());
+
+                $this->crawler->addToCrawlQueue($crawlUrl);
+            });
+    }
+
+    protected function extractLinksFromHtml(string $html, UriInterface $foundOnUrl): ?Collection
+    {
+        $domCrawler = new DomCrawler($html, $foundOnUrl);
+
+        return collect($domCrawler->filterXPath('//loc')
+            ->each(function (DomCrawler $node) {
+                try {
+                    $linkText = $node->text();
+
+                    if ($linkText) {
+                        $linkText = substr($linkText, 0, 4000);
+                    }
+
+                    return new Url($linkText, $linkText);
+                } catch (InvalidArgumentException $exception) {
+                    return null;
+                }
+            }));
+    }
+
+    protected function hasCrawlableScheme(UriInterface $uri): bool
+    {
+        return in_array($uri->getScheme(), ['http', 'https']);
+    }
+
+    protected function normalizeUrl(UriInterface $url): UriInterface
+    {
+        return $url->withFragment('');
+    }
+
+    protected function shouldCrawl(Node $node): bool
+    {
+        if ($this->crawler->mustRespectRobots() && ! $this->crawler->getRobotsTxt()->allows($node->getValue(), $this->crawler->getUserAgent())) {
+            return false;
+        }
+
+        $maximumDepth = $this->crawler->getMaximumDepth();
+
+        if (is_null($maximumDepth)) {
+            return true;
+        }
+
+        return $node->getDepth() <= $maximumDepth;
+    }
+}
diff --git a/src/UrlParsers/UrlParser.php b/src/UrlParsers/UrlParser.php
new file mode 100644
index 00000000..24ed5829
--- /dev/null
+++ b/src/UrlParsers/UrlParser.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace Spatie\Crawler\UrlParsers;
+
+use Psr\Http\Message\UriInterface;
+use Spatie\Crawler\Crawler;
+
+interface UrlParser
+{
+    public function __construct(Crawler $crawler);
+
+    public function addFromHtml(string $html, UriInterface $foundOnUrl): void;
+}
diff --git a/tests/CrawlObserverCollectionTest.php b/tests/CrawlObserverCollectionTest.php
index 31b10257..60170b89 100644
--- a/tests/CrawlObserverCollectionTest.php
+++ b/tests/CrawlObserverCollectionTest.php
@@ -20,8 +20,8 @@
         public function crawled(
             UriInterface $url,
             ResponseInterface $response,
-            UriInterface $foundOnUrl = null,
-            string $linkText = null,
+            ?UriInterface $foundOnUrl = null,
+            ?string $linkText = null,
         ): void {
             $this->crawled = true;
         }
@@ -29,8 +29,8 @@ public function crawled(
         public function crawlFailed(
             UriInterface $url,
             RequestException $requestException,
-            UriInterface $foundOnUrl = null,
-            string $linkText = null,
+            ?UriInterface $foundOnUrl = null,
+            ?string $linkText = null,
         ): void {
             $this->failed = true;
         }
diff --git a/tests/SitemapUrlParserTest.php b/tests/SitemapUrlParserTest.php
new file mode 100644
index 00000000..d77f0da4
--- /dev/null
+++ b/tests/SitemapUrlParserTest.php
@@ -0,0 +1,46 @@
+<?php
+
+use Spatie\Crawler\Test\TestClasses\Log;
+use Spatie\Crawler\UrlParsers\SitemapUrlParser;
+
+beforeEach(function () {
+    skipIfTestServerIsNotRunning();
+
+    Log::reset();
+});
+
+it('should extract child sitemaps from sitemap index', function () {
+    createCrawler()
+        ->setUrlParserClass(SitemapUrlParser::class)
+        ->startCrawling('http://localhost:8080/sitemap_index.xml');
+
+    expect(['url' => 'http://localhost:8080/sitemap1.xml', 'foundOn' => 'http://localhost:8080/sitemap_index.xml'])
+        ->toBeCrawledOnce();
+
+    expect(['url' => 'http://localhost:8080/sitemap2.xml', 'foundOn' => 'http://localhost:8080/sitemap_index.xml'])
+        ->toBeCrawledOnce();
+});
+
+it('should extract urls from sitemaps trough sitemap index', function () {
+    createCrawler()
+        ->setUrlParserClass(SitemapUrlParser::class)
+        ->startCrawling('http://localhost:8080/sitemap_index.xml');
+
+    expect(['url' => 'http://localhost:8080/', 'foundOn' => 'http://localhost:8080/sitemap1.xml'])
+        ->toBeCrawledOnce();
+
+    expect(['url' => 'http://localhost:8080/link1', 'foundOn' => 'http://localhost:8080/sitemap1.xml'])
+        ->toBeCrawledOnce();
+
+    expect(['url' => 'http://localhost:8080/link1-next', 'foundOn' => 'http://localhost:8080/sitemap2.xml'])
+        ->toBeCrawledOnce();
+
+    expect(['url' => 'http://localhost:8080/link1-prev', 'foundOn' => 'http://localhost:8080/sitemap2.xml'])
+        ->toBeCrawledOnce();
+
+    expect(['url' => 'http://localhost:8080/link2', 'foundOn' => 'http://localhost:8080/sitemap2.xml'])
+        ->toBeCrawledOnce();
+
+    expect(['url' => 'http://localhost:8080/link3', 'foundOn' => 'http://localhost:8080/sitemap2.xml'])
+        ->toBeCrawledOnce();
+});
diff --git a/tests/TestClasses/CrawlLogger.php b/tests/TestClasses/CrawlLogger.php
index c8935d95..a39c4d45 100644
--- a/tests/TestClasses/CrawlLogger.php
+++ b/tests/TestClasses/CrawlLogger.php
@@ -34,8 +34,8 @@ public function willCrawl(UriInterface $url, ?string $linkText): void
     public function crawled(
         UriInterface $url,
         ResponseInterface $response,
-        UriInterface $foundOnUrl = null,
-        string $linkText = null,
+        ?UriInterface $foundOnUrl = null,
+        ?string $linkText = null,
     ): void {
         $this->logCrawl($url, $foundOnUrl, $linkText);
     }
@@ -43,13 +43,13 @@ public function crawled(
     public function crawlFailed(
         UriInterface $url,
         RequestException $requestException,
-        UriInterface $foundOnUrl = null,
-        string $linkText = null,
+        ?UriInterface $foundOnUrl = null,
+        ?string $linkText = null,
     ): void {
         $this->logCrawl($url, $foundOnUrl, $linkText);
     }
 
-    protected function logCrawl(UriInterface $url, ?UriInterface $foundOnUrl, string $linkText = null)
+    protected function logCrawl(UriInterface $url, ?UriInterface $foundOnUrl, ?string $linkText = null)
     {
         $logText = "{$this->observerId}hasBeenCrawled: {$url}";
 
diff --git a/tests/server/package-lock.json b/tests/server/package-lock.json
index 5a885ce7..0a2af35f 100644
--- a/tests/server/package-lock.json
+++ b/tests/server/package-lock.json
@@ -1,75 +1,89 @@
 {
   "name": "server",
   "version": "1.0.0",
-  "lockfileVersion": 1,
+  "lockfileVersion": 3,
   "requires": true,
-  "dependencies": {
-    "@types/node": {
+  "packages": {
+    "": {
+      "name": "server",
+      "version": "1.0.0",
+      "license": "MIT",
+      "dependencies": {
+        "body-parser": "^1.18.2",
+        "express": "^4.16.2",
+        "puppeteer": "^5.3.1"
+      }
+    },
+    "node_modules/@types/node": {
       "version": "14.11.2",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-14.11.2.tgz",
       "integrity": "sha512-jiE3QIxJ8JLNcb1Ps6rDbysDhN4xa8DJJvuC9prr6w+1tIh+QAbYyNF3tyiZNLDBIuBCf4KEcV2UvQm/V60xfA==",
       "optional": true
     },
-    "@types/yauzl": {
+    "node_modules/@types/yauzl": {
       "version": "2.9.1",
       "resolved": "https://registry.npmjs.org/@types/yauzl/-/yauzl-2.9.1.tgz",
       "integrity": "sha512-A1b8SU4D10uoPjwb0lnHmmu8wZhR9d+9o2PKBQT2jU5YPTKsxac6M2qGAdY7VcL+dHHhARVUDmeg0rOrcd9EjA==",
       "optional": true,
-      "requires": {
+      "dependencies": {
         "@types/node": "*"
       }
     },
-    "accepts": {
+    "node_modules/accepts": {
       "version": "1.3.4",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.4.tgz",
       "integrity": "sha1-hiRnWMfdbSGmR0/whKR0DsBesh8=",
-      "requires": {
+      "dependencies": {
         "mime-types": "~2.1.16",
         "negotiator": "0.6.1"
+      },
+      "engines": {
+        "node": ">= 0.6"
       }
     },
-    "agent-base": {
+    "node_modules/agent-base": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-5.1.1.tgz",
-      "integrity": "sha512-TMeqbNl2fMW0nMjTEPOwe3J/PRFP4vqeoNuQMG0HlMrtm5QxKqdvAkZ1pRBQ/ulIyDD5Yq0nJ7YbdD8ey0TO3g=="
+      "integrity": "sha512-TMeqbNl2fMW0nMjTEPOwe3J/PRFP4vqeoNuQMG0HlMrtm5QxKqdvAkZ1pRBQ/ulIyDD5Yq0nJ7YbdD8ey0TO3g==",
+      "engines": {
+        "node": ">= 6.0.0"
+      }
     },
-    "array-flatten": {
+    "node_modules/array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
     },
-    "balanced-match": {
+    "node_modules/balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
       "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
     },
-    "base64-js": {
+    "node_modules/base64-js": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.1.tgz",
       "integrity": "sha512-mLQ4i2QO1ytvGWFWmcngKO//JXAQueZvwEKtjgQFM4jIK0kU+ytMfplL8j+n5mspOfjHwoAg+9yhb7BwAHm36g=="
     },
-    "bl": {
+    "node_modules/bl": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/bl/-/bl-4.0.3.tgz",
       "integrity": "sha512-fs4G6/Hu4/EE+F75J8DuN/0IpQqNjAdC7aEQv7Qt8MHGUH7Ckv2MwTEEeN9QehD0pfIDkMI1bkHYkKy7xHyKIg==",
-      "requires": {
+      "dependencies": {
         "buffer": "^5.5.0",
         "inherits": "^2.0.4",
         "readable-stream": "^3.4.0"
-      },
-      "dependencies": {
-        "inherits": {
-          "version": "2.0.4",
-          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
-          "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
-        }
       }
     },
-    "body-parser": {
+    "node_modules/bl/node_modules/inherits": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+      "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
+    },
+    "node_modules/body-parser": {
       "version": "1.18.2",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.18.2.tgz",
       "integrity": "sha1-h2eKGdhLR9hZuDGZvVm84iKxBFQ=",
-      "requires": {
+      "dependencies": {
         "bytes": "3.0.0",
         "content-type": "~1.0.4",
         "debug": "2.6.9",
@@ -80,122 +94,149 @@
         "qs": "6.5.1",
         "raw-body": "2.3.2",
         "type-is": "~1.6.15"
+      },
+      "engines": {
+        "node": ">= 0.8"
       }
     },
-    "brace-expansion": {
+    "node_modules/brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
       "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "requires": {
+      "dependencies": {
         "balanced-match": "^1.0.0",
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@@ -674,131 +866,183 @@
         "range-parser": "~1.2.0",
         "statuses": "~1.3.1"
       },
-      "dependencies": {
-        "statuses": {
-          "version": "1.3.1",
-          "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.3.1.tgz",
-          "integrity": "sha1-+vUbnrdKrvOzrPStX2Gr8ky3uT4="
-        }
+      "engines": {
+        "node": ">= 0.8.0"
       }
     },
-    "serve-static": {
+    "node_modules/send/node_modules/statuses": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.3.1.tgz",
+      "integrity": "sha1-+vUbnrdKrvOzrPStX2Gr8ky3uT4=",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/serve-static": {
       "version": "1.13.1",
       "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.13.1.tgz",
       "integrity": "sha512-hSMUZrsPa/I09VYFJwa627JJkNs0NrfL1Uzuup+GqHfToR2KcsXFymXSV90hoyw3M+msjFuQly+YzIH/q0MGlQ==",
-      "requires": {
+      "dependencies": {
         "encodeurl": "~1.0.1",
         "escape-html": "~1.0.3",
         "parseurl": "~1.3.2",
         "send": "0.16.1"
+      },
+      "engines": {
+        "node": ">= 0.8.0"
       }
     },
-    "setprototypeof": {
+    "node_modules/setprototypeof": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.0.3.tgz",
       "integrity": "sha1-ZlZ+NwQ+608E2RvWWMDL77VbjgQ="
     },
-    "statuses": {
+    "node_modules/statuses": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.4.0.tgz",
-      "integrity": "sha512-zhSCtt8v2NDrRlPQpCNtw/heZLtfUDqxBM1udqikb/Hbk52LK4nQSwr10u77iopCW5LsyHpuXS0GnEc48mLeew=="
+      "integrity": "sha512-zhSCtt8v2NDrRlPQpCNtw/heZLtfUDqxBM1udqikb/Hbk52LK4nQSwr10u77iopCW5LsyHpuXS0GnEc48mLeew==",
+      "engines": {
+        "node": ">= 0.6"
+      }
     },
-    "string_decoder": {
+    "node_modules/string_decoder": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
       "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
-      "requires": {
-        "safe-buffer": "~5.2.0"
-      },
       "dependencies": {
-        "safe-buffer": {
-          "version": "5.2.1",
-          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
-          "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ=="
-        }
+        "safe-buffer": "~5.2.0"
       }
     },
-    "tar-fs": {
+    "node_modules/string_decoder/node_modules/safe-buffer": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
+    "node_modules/tar-fs": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-2.1.0.tgz",
       "integrity": "sha512-9uW5iDvrIMCVpvasdFHW0wJPez0K4JnMZtsuIeDI7HyMGJNxmDZDOCQROr7lXyS+iL/QMpj07qcjGYTSdRFXUg==",
-      "requires": {
+      "dependencies": {
         "chownr": "^1.1.1",
         "mkdirp-classic": "^0.5.2",
         "pump": "^3.0.0",
         "tar-stream": "^2.0.0"
       }
     },
-    "tar-stream": {
+    "node_modules/tar-stream": {
       "version": "2.1.4",
       "resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-2.1.4.tgz",
       "integrity": "sha512-o3pS2zlG4gxr67GmFYBLlq+dM8gyRGUOvsrHclSkvtVtQbjV0s/+ZE8OpICbaj8clrX3tjeHngYGP7rweaBnuw==",
-      "requires": {
+      "dependencies": {
         "bl": "^4.0.3",
         "end-of-stream": "^1.4.1",
         "fs-constants": "^1.0.0",
         "inherits": "^2.0.3",
         "readable-stream": "^3.1.1"
+      },
+      "engines": {
+        "node": ">=6"
       }
     },
-    "through": {
+    "node_modules/through": {
       "version": "2.3.8",
       "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU="
     },
-    "type-is": {
+    "node_modules/type-is": {
       "version": "1.6.16",
       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.16.tgz",
       "integrity": "sha512-HRkVv/5qY2G6I8iab9cI7v1bOIdhm94dVjQCPFElW9W+3GeDOSHmy2EBYe4VTApuzolPcmgFTN3ftVJRKR2J9Q==",
-      "requires": {
+      "dependencies": {
         "media-typer": "0.3.0",
         "mime-types": "~2.1.18"
+      },
+      "engines": {
+        "node": ">= 0.6"
       }
     },
-    "unbzip2-stream": {
+    "node_modules/unbzip2-stream": {
       "version": "1.4.3",
       "resolved": "https://registry.npmjs.org/unbzip2-stream/-/unbzip2-stream-1.4.3.tgz",
       "integrity": "sha512-mlExGW4w71ebDJviH16lQLtZS32VKqsSfk80GCfUlwT/4/hNRFsoscrF/c++9xinkMzECL1uL9DDwXqFWkruPg==",
-      "requires": {
+      "dependencies": {
         "buffer": "^5.2.1",
         "through": "^2.3.8"
       }
     },
-    "unpipe": {
+    "node_modules/unpipe": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
-      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
+      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw=",
+      "engines": {
+        "node": ">= 0.8"
+      }
     },
-    "util-deprecate": {
+    "node_modules/util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
     },
-    "utils-merge": {
+    "node_modules/utils-merge": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
-      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=",
+      "engines": {
+        "node": ">= 0.4.0"
+      }
     },
-    "vary": {
+    "node_modules/vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
-      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=",
+      "engines": {
+        "node": ">= 0.8"
+      }
     },
-    "wrappy": {
+    "node_modules/wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
     },
-    "ws": {
+    "node_modules/ws": {
       "version": "7.3.1",
       "resolved": "https://registry.npmjs.org/ws/-/ws-7.3.1.tgz",
-      "integrity": "sha512-D3RuNkynyHmEJIpD2qrgVkc9DQ23OrN/moAwZX4L8DfvszsJxpjQuUq3LMx6HoYji9fbIOBY18XWBsAux1ZZUA=="
+      "integrity": "sha512-D3RuNkynyHmEJIpD2qrgVkc9DQ23OrN/moAwZX4L8DfvszsJxpjQuUq3LMx6HoYji9fbIOBY18XWBsAux1ZZUA==",
+      "engines": {
+        "node": ">=8.3.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": "^5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
     },
-    "yauzl": {
+    "node_modules/yauzl": {
       "version": "2.10.0",
       "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
       "integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
-      "requires": {
+      "dependencies": {
         "buffer-crc32": "~0.2.3",
         "fd-slicer": "~1.1.0"
       }
diff --git a/tests/server/server.js b/tests/server/server.js
index c20fa609..b0dd4550 100644
--- a/tests/server/server.js
+++ b/tests/server/server.js
@@ -136,6 +136,78 @@ app.get('/robots.txt', function (req, res) {
     res.end(html);
 });
 
+app.get('/sitemap_index.xml', function (req, res) {
+    var sitemapIndex = '<?xml version="1.0" encoding="UTF-8"?>\n' +
+        '<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">\n' +
+        '   <sitemap>\n' +
+        '       <loc>http://localhost:8080/sitemap1.xml</loc>\n' +
+        '       <lastmod>2024-01-01</lastmod>\n' +
+        '   </sitemap>\n' +
+        '   <sitemap>\n' +
+        '       <loc>http://localhost:8080/sitemap2.xml</loc>\n' +
+        '       <lastmod>2024-01-01</lastmod>\n' +
+        '   </sitemap>\n' +
+        '</sitemapindex>';
+
+    res.contentType('text/xml; charset=utf-8');
+    res.end(sitemapIndex);
+});
+
+app.get('/sitemap1.xml', function (req, res) {
+    var sitemap1 = '<?xml version="1.0" encoding="UTF-8"?>\n' +
+        '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">\n' +
+        '   <url>\n' +
+        '       <loc>http://localhost:8080/</loc>\n' +
+        '       <lastmod>2016-01-01</lastmod>\n' +
+        '       <changefreq>monthly</changefreq>\n' +
+        '       <priority>0.8</priority>\n' +
+        '   </url>\n' +
+        '   <url>\n' +
+        '       <loc>http://localhost:8080/link1</loc>\n' +
+        '       <lastmod>2016-01-01</lastmod>\n' +
+        '       <changefreq>monthly</changefreq>\n' +
+        '       <priority>0.8</priority>\n' +
+        '   </url>\n' +
+        '</urlset>';
+
+    res.contentType('text/xml; charset=utf-8');
+    res.end(sitemap1);
+});
+
+app.get('/sitemap2.xml', function (req, res) {
+    var sitemap2 = '<?xml version="1.0" encoding="UTF-8"?>\n' +
+        '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">\n' +
+        '   <url>\n' +
+        '       <loc>http://localhost:8080/link1-next</loc>\n' +
+        '       <lastmod>2016-01-01</lastmod>\n' +
+        '       <changefreq>monthly</changefreq>\n' +
+        '       <priority>0.8</priority>\n' +
+        '   </url>\n' +
+        '   <url>\n' +
+        '       <loc>http://localhost:8080/link1-prev</loc>\n' +
+        '       <lastmod>2016-01-01</lastmod>\n' +
+        '       <changefreq>monthly</changefreq>\n' +
+        '       <priority>0.8</priority>\n' +
+        '   </url>\n' +
+        '   <url>\n' +
+        '       <loc>http://localhost:8080/link2</loc>\n' +
+        '       <lastmod>2016-01-01</lastmod>\n' +
+        '       <changefreq>monthly</changefreq>\n' +
+        '       <priority>0.8</priority>\n' +
+        '   </url>\n' +
+        '   <url lang="fr">\n' +
+        '       <loc>http://localhost:8080/link3</loc>\n' +
+        '       <lastmod>2016-01-01</lastmod>\n' +
+        '       <changefreq>monthly</changefreq>\n' +
+        '       <priority>0.8</priority>\n' +
+        '   </url>\n' +
+        '</urlset>';
+
+    res.contentType('text/xml; charset=utf-8');
+    res.end(sitemap2);
+});
+
+
 let server = app.listen(8080, function () {
     const host = 'localhost';
     const port = server.address().port;