Removing junk from sitemap and full site (recursive) crawls (#711)

* Removing junk from sitemap and full site (recursive) crawls

* Small typo fix for result.markdown

python/src/server/services/crawling/crawling_service.py

@@ -74,10 +74,11 @@ class CrawlingService:
         self.url_handler = URLHandler()
         self.site_config = SiteConfig()
         self.markdown_generator = self.site_config.get_markdown_generator()
+        self.link_pruning_markdown_generator = self.site_config.get_link_pruning_markdown_generator()
 
         # Initialize strategies
-        self.batch_strategy = BatchCrawlStrategy(crawler, self.markdown_generator)
-        self.recursive_strategy = RecursiveCrawlStrategy(crawler, self.markdown_generator)
+        self.batch_strategy = BatchCrawlStrategy(crawler, self.link_pruning_markdown_generator)
+        self.recursive_strategy = RecursiveCrawlStrategy(crawler, self.link_pruning_markdown_generator)
         self.single_page_strategy = SinglePageCrawlStrategy(crawler, self.markdown_generator)
         self.sitemap_strategy = SitemapCrawlStrategy()
 

python/src/server/services/crawling/helpers/site_config.py

@@ -4,6 +4,7 @@ Site Configuration Helper
 Handles site-specific configurations and detection.
 """
 from crawl4ai.markdown_generation_strategy import DefaultMarkdownGenerator
+from crawl4ai.content_filter_strategy import PruningContentFilter
 
 from ....config.logfire_config import get_logger
 
@@ -96,3 +97,33 @@ class SiteConfig:
                 "code_language_callback": lambda el: el.get('class', '').replace('language-', '') if el else ''
             }
         )
+
+    @staticmethod
+    def get_link_pruning_markdown_generator():
+        """
+        Get markdown generator for the recursive crawling strategy that cleans up pages crawled.
+        
+        Returns:
+            Configured markdown generator
+        """
+        prune_filter = PruningContentFilter(
+            threshold=0.2,
+            threshold_type="fixed"
+        )
+
+        return DefaultMarkdownGenerator(
+            content_source="html",  # Use raw HTML to preserve code blocks
+            content_filter=prune_filter,
+            options={
+                "mark_code": True,         # Mark code blocks properly
+                "handle_code_in_pre": True,  # Handle <pre><code> tags
+                "body_width": 0,            # No line wrapping
+                "skip_internal_links": True,  # Add to reduce noise
+                "include_raw_html": False,    # Prevent HTML in markdown
+                "escape": False,             # Don't escape special chars in code
+                "decode_unicode": True,      # Decode unicode characters
+                "strip_empty_lines": False,  # Preserve empty lines in code
+                "preserve_code_formatting": True,  # Custom option if supported
+                "code_language_callback": lambda el: el.get('class', '').replace('language-', '') if el else ''
+            }
+        )

python/src/server/services/crawling/strategies/batch.py

@@ -231,12 +231,12 @@ class BatchCrawlStrategy:
                         raise
 
                 processed += 1
-                if result.success and result.markdown:
+                if result.success and result.markdown and result.markdown.fit_markdown:
                     # Map back to original URL
                     original_url = url_mapping.get(result.url, result.url)
                     successful_results.append({
                         "url": original_url,
-                        "markdown": result.markdown,
+                        "markdown": result.markdown.fit_markdown,
                         "html": result.html,  # Use raw HTML
                     })
                 else:

python/src/server/services/crawling/strategies/recursive.py

@@ -276,10 +276,10 @@ class RecursiveCrawlStrategy:
                     visited.add(norm_url)
                     total_processed += 1
 
-                    if result.success and result.markdown:
+                    if result.success and result.markdown and result.markdown.fit_markdown:
                         results_all.append({
                             "url": original_url,
-                            "markdown": result.markdown,
+                            "markdown": result.markdown.fit_markdown,
                             "html": result.html,  # Always use raw HTML for code extraction
                         })
                         depth_successful += 1