added correct endpoints and file type detection

app/tasks/convert_to_pdf.py

@@ -2,6 +2,7 @@
 import os
 import requests
 import logging
+import mimetypes
 from celery import shared_task
 from app.config import settings
 from app.tasks.upload_to_s3 import upload_to_s3
@@ -12,25 +13,57 @@ logger = logging.getLogger(__name__)
 def convert_to_pdf(file_path):
     """
     Converts a file to PDF using Gotenberg's API.
+    Determines the appropriate Gotenberg endpoint based on the file's MIME type.
     On success, saves the PDF locally and enqueues it for S3 upload.
     """
-    # Ensure that settings contain the Gotenberg URL (e.g., "http://gotenberg:3000")
     gotenberg_url = getattr(settings, "gotenberg_url", None)
     if not gotenberg_url:
         logger.error("Gotenberg URL is not configured in settings.")
         return
 
+    # Try to guess the MIME type based on file content (using extension-based fallback)
+    mime_type, encoding = mimetypes.guess_type(file_path)
+    logger.info(f"Guessed MIME type for '{file_path}' is: {mime_type}")
+
+    endpoint = None
+    form_key = "files"  # Default form key for most endpoints
+
+    if mime_type:
+        if mime_type == "text/html":
+            endpoint = f"{gotenberg_url}/forms/chromium/convert/html"
+            # The Chromium HTML endpoint expects the HTML file to be provided under the key "index.html"
+            form_key = "index.html"
+        elif mime_type.startswith("image/"):
+            # For images, we use the LibreOffice endpoint (which supports image conversion)
+            endpoint = f"{gotenberg_url}/forms/libreoffice/convert"
+        elif mime_type.startswith("text/plain"):
+            endpoint = f"{gotenberg_url}/forms/libreoffice/convert"
+        elif mime_type in ["text/markdown", "text/x-markdown"]:
+            # Optionally, you could use the Chromium markdown endpoint if you have an HTML wrapper.
+            # For now, we'll fallback to LibreOffice.
+            endpoint = f"{gotenberg_url}/forms/libreoffice/convert"
+        else:
+            # For all other MIME types (e.g. Office documents), use the LibreOffice endpoint.
+            endpoint = f"{gotenberg_url}/forms/libreoffice/convert"
+    else:
+        # If MIME detection fails, fallback to extension-based detection.
+        ext = os.path.splitext(file_path)[1].lower()
+        if ext in [".html", ".htm"]:
+            endpoint = f"{gotenberg_url}/forms/chromium/convert/html"
+            form_key = "index.html"
+        else:
+            endpoint = f"{gotenberg_url}/forms/libreoffice/convert"
+
     try:
         with open(file_path, "rb") as f:
-            files = {"file": f}
-            # Adjust the endpoint path if needed.
-            response = requests.post(f"{gotenberg_url}/convert", files=files)
+            files = {form_key: f}
+            response = requests.post(endpoint, files=files)
+
         if response.status_code == 200:
             converted_file_path = os.path.splitext(file_path)[0] + ".pdf"
-            with open(converted_file_path, "wb") as f:
-                f.write(response.content)
+            with open(converted_file_path, "wb") as out_file:
+                out_file.write(response.content)
             logger.info(f"Converted file saved as PDF: {converted_file_path}")
-            # Enqueue the upload of the converted PDF.
             upload_to_s3.delay(converted_file_path)
             return converted_file_path
         else: