Merge pull request #299 from mdeweerd/elm_extended

Add fallback for plain elm #294 #290

ingest.py

@@ -24,6 +24,28 @@ from langchain.docstore.document import Document
 from constants import CHROMA_SETTINGS
 
 
+class MyElmLoader(UnstructuredEmailLoader):
+    """Wrapper to fallback to text/plain when default does not work"""
+
+    def load(self) -> List[Document]:
+        """Wrapper adding fallback for elm without html"""
+        try:
+            try:
+                doc = UnstructuredEmailLoader.load(self)
+            except ValueError as e:
+                if 'text/html content not found in email' in str(e):
+                    # Try plain text
+                    self.unstructured_kwargs["content_source"]="text/plain"
+                    doc = UnstructuredEmailLoader.load(self)
+                else:
+                    raise
+        except Exception as e:
+            # Add file_path to exception message
+            raise type(e)(f"{self.file_path}: {e}") from e
+
+        return doc
+
+
 # Map file extensions to document loaders and their arguments
 LOADER_MAPPING = {
     ".csv": (CSVLoader, {}),
@@ -31,7 +53,7 @@ LOADER_MAPPING = {
     ".doc": (UnstructuredWordDocumentLoader, {}),
     ".docx": (UnstructuredWordDocumentLoader, {}),
     ".enex": (EverNoteLoader, {}),
-    ".eml": (UnstructuredEmailLoader, {}),
+    ".eml": (MyElmLoader, {}),
     ".epub": (UnstructuredEPubLoader, {}),
     ".html": (UnstructuredHTMLLoader, {}),
     ".md": (UnstructuredMarkdownLoader, {}),