sitemap more flexible (#2214)

langchain/document_loaders/sitemap.py

@@ -1,21 +1,31 @@
 """Loader that fetches a sitemap and loads those URLs."""
 import re
-from typing import Any, List, Optional
+from typing import Any, Callable, List, Optional
 
 from langchain.document_loaders.web_base import WebBaseLoader
 from langchain.schema import Document
 
 
+def _default_parsing_function(content: Any) -> str:
+    return str(content.get_text())
+
+
 class SitemapLoader(WebBaseLoader):
     """Loader that fetches a sitemap and loads those URLs."""
 
-    def __init__(self, web_path: str, filter_urls: Optional[List[str]] = None):
+    def __init__(
+        self,
+        web_path: str,
+        filter_urls: Optional[List[str]] = None,
+        parsing_function: Optional[Callable] = None,
+    ):
         """Initialize with webpage path and optional filter URLs.
 
         Args:
             web_path: url of the sitemap
             filter_urls: list of strings or regexes that will be applied to filter the
-            urls that are parsed and loaded
+                urls that are parsed and loaded
+            parsing_function: Function to parse bs4.Soup output
         """
 
         try:
@@ -28,6 +38,7 @@ class SitemapLoader(WebBaseLoader):
         super().__init__(web_path)
 
         self.filter_urls = filter_urls
+        self.parsing_function = parsing_function or _default_parsing_function
 
     def parse_sitemap(self, soup: Any) -> List[dict]:
         """Parse sitemap xml and load into a list of dicts."""
@@ -62,7 +73,7 @@ class SitemapLoader(WebBaseLoader):
 
         return [
             Document(
-                page_content=str(results[i].get_text()),
+                page_content=self.parsing_function(results[i]),
                 metadata={**{"source": els[i]["loc"]}, **els[i]},
             )
             for i in range(len(results))