diff --git a/backend/open_webui/retrieval/loaders/main.py b/backend/open_webui/retrieval/loaders/main.py index e75c69682..e1b485b84 100644 --- a/backend/open_webui/retrieval/loaders/main.py +++ b/backend/open_webui/retrieval/loaders/main.py @@ -21,7 +21,7 @@ from langchain_community.document_loaders import ( ) from langchain_core.documents import Document -from mistralai import Mistral +from .mistral import MistralLoader from open_webui.env import SRC_LOG_LEVELS, GLOBAL_LOG_LEVEL @@ -166,53 +166,6 @@ class DoclingLoader: raise Exception(f"Error calling Docling: {error_msg}") -class MistralLoader: - def __init__(self, api_key: str, file_path: str): - self.api_key = api_key - self.file_path = file_path - self.client = Mistral(api_key=api_key) - - def load(self) -> list[Document]: - log.info("Uploading file to Mistral OCR") - uploaded_pdf = self.client.files.upload( - file={ - "file_name": self.file_path.split("/")[-1], - "content": open(self.file_path, "rb"), - }, - purpose="ocr", - ) - log.info("File uploaded to Mistral OCR, getting signed URL") - signed_url = self.client.files.get_signed_url(file_id=uploaded_pdf.id) - log.info("Signed URL received, processing OCR") - ocr_response = self.client.ocr.process( - model="mistral-ocr-latest", - document={ - "type": "document_url", - "document_url": signed_url.url, - }, - ) - log.info("OCR processing done, deleting uploaded file") - deleted_pdf = self.client.files.delete(file_id=uploaded_pdf.id) - log.info("Uploaded file deleted") - log.debug("OCR response: %s", ocr_response) - if not hasattr(ocr_response, "pages") or not ocr_response.pages: - log.error("No pages found in OCR response") - return [Document(page_content="No text content found", metadata={})] - - return [ - Document( - page_content=page.markdown, - metadata={ - "page": page.index, - "page_label": page.index + 1, - "total_pages": len(ocr_response.pages), - }, - ) - for page in ocr_response.pages - if hasattr(page, "markdown") and hasattr(page, "index") - ] - - class Loader: def __init__(self, engine: str = "", **kwargs): self.engine = engine diff --git a/backend/open_webui/retrieval/loaders/mistral.py b/backend/open_webui/retrieval/loaders/mistral.py new file mode 100644 index 000000000..2203a5b6d --- /dev/null +++ b/backend/open_webui/retrieval/loaders/mistral.py @@ -0,0 +1,226 @@ +import requests +import logging +import os +import sys +from typing import List, Dict, Any + +from langchain_core.documents import Document +from open_webui.env import SRC_LOG_LEVELS, GLOBAL_LOG_LEVEL + +logging.basicConfig(stream=sys.stdout, level=GLOBAL_LOG_LEVEL) +log = logging.getLogger(__name__) +log.setLevel(SRC_LOG_LEVELS["RAG"]) + + +class MistralLoader: + """ + Loads documents by processing them through the Mistral OCR API using requests. + """ + + BASE_API_URL = "https://api.mistral.ai/v1" + + def __init__(self, api_key: str, file_path: str): + """ + Initializes the loader. + + Args: + api_key: Your Mistral API key. + file_path: The local path to the PDF file to process. + """ + if not api_key: + raise ValueError("API key cannot be empty.") + if not os.path.exists(file_path): + raise FileNotFoundError(f"File not found at {file_path}") + + self.api_key = api_key + self.file_path = file_path + self.headers = {"Authorization": f"Bearer {self.api_key}"} + + def _handle_response(self, response: requests.Response) -> Dict[str, Any]: + """Checks response status and returns JSON content.""" + try: + response.raise_for_status() # Raises HTTPError for bad responses (4xx or 5xx) + # Handle potential empty responses for certain successful requests (e.g., DELETE) + if response.status_code == 204 or not response.content: + return {} # Return empty dict if no content + return response.json() + except requests.exceptions.HTTPError as http_err: + log.error(f"HTTP error occurred: {http_err} - Response: {response.text}") + raise + except requests.exceptions.RequestException as req_err: + log.error(f"Request exception occurred: {req_err}") + raise + except ValueError as json_err: # Includes JSONDecodeError + log.error(f"JSON decode error: {json_err} - Response: {response.text}") + raise # Re-raise after logging + + def _upload_file(self) -> str: + """Uploads the file to Mistral for OCR processing.""" + log.info("Uploading file to Mistral API") + url = f"{self.BASE_API_URL}/files" + file_name = os.path.basename(self.file_path) + + try: + with open(self.file_path, "rb") as f: + files = {"file": (file_name, f, "application/pdf")} + data = {"purpose": "ocr"} + # No explicit Content-Type header needed here, requests handles it for multipart/form-data + upload_headers = self.headers.copy() # Avoid modifying self.headers + + response = requests.post( + url, headers=upload_headers, files=files, data=data + ) + + response_data = self._handle_response(response) + file_id = response_data.get("id") + if not file_id: + raise ValueError("File ID not found in upload response.") + log.info(f"File uploaded successfully. File ID: {file_id}") + return file_id + except Exception as e: + log.error(f"Failed to upload file: {e}") + raise + + def _get_signed_url(self, file_id: str) -> str: + """Retrieves a temporary signed URL for the uploaded file.""" + log.info(f"Getting signed URL for file ID: {file_id}") + url = f"{self.BASE_API_URL}/files/{file_id}/url" + # Using expiry=24 as per the curl example; adjust if needed. + params = {"expiry": 24} + signed_url_headers = {**self.headers, "Accept": "application/json"} + + try: + response = requests.get(url, headers=signed_url_headers, params=params) + response_data = self._handle_response(response) + signed_url = response_data.get("url") + if not signed_url: + raise ValueError("Signed URL not found in response.") + log.info("Signed URL received.") + return signed_url + except Exception as e: + log.error(f"Failed to get signed URL: {e}") + raise + + def _process_ocr(self, signed_url: str) -> Dict[str, Any]: + """Sends the signed URL to the OCR endpoint for processing.""" + log.info("Processing OCR via Mistral API") + url = f"{self.BASE_API_URL}/ocr" + ocr_headers = { + **self.headers, + "Content-Type": "application/json", + "Accept": "application/json", + } + payload = { + "model": "mistral-ocr-latest", + "document": { + "type": "document_url", + "document_url": signed_url, + }, + # "include_image_base64": False # Explicitly set if needed, default seems false + } + + try: + response = requests.post(url, headers=ocr_headers, json=payload) + ocr_response = self._handle_response(response) + log.info("OCR processing done.") + log.debug("OCR response: %s", ocr_response) + return ocr_response + except Exception as e: + log.error(f"Failed during OCR processing: {e}") + raise + + def _delete_file(self, file_id: str) -> None: + """Deletes the file from Mistral storage.""" + log.info(f"Deleting uploaded file ID: {file_id}") + url = f"{self.BASE_API_URL}/files/{file_id}" + # No specific Accept header needed, default or Authorization is usually sufficient + + try: + response = requests.delete(url, headers=self.headers) + delete_response = self._handle_response( + response + ) # Check status, ignore response body unless needed + log.info( + f"File deleted successfully: {delete_response}" + ) # Log the response if available + except Exception as e: + # Log error but don't necessarily halt execution if deletion fails + log.error(f"Failed to delete file ID {file_id}: {e}") + # Depending on requirements, you might choose to raise the error here + + def load(self) -> List[Document]: + """ + Executes the full OCR workflow: upload, get URL, process OCR, delete file. + + Returns: + A list of Document objects, one for each page processed. + """ + file_id = None + try: + # 1. Upload file + file_id = self._upload_file() + + # 2. Get Signed URL + signed_url = self._get_signed_url(file_id) + + # 3. Process OCR + ocr_response = self._process_ocr(signed_url) + + # 4. Process results + pages_data = ocr_response.get("pages") + if not pages_data: + log.warning("No pages found in OCR response.") + return [Document(page_content="No text content found", metadata={})] + + documents = [] + total_pages = len(pages_data) + for page_data in pages_data: + page_content = page_data.get("markdown") + page_index = page_data.get("index") # API uses 0-based index + + if page_content is not None and page_index is not None: + documents.append( + Document( + page_content=page_content, + metadata={ + "page": page_index, # 0-based index from API + "page_label": page_index + + 1, # 1-based label for convenience + "total_pages": total_pages, + # Add other relevant metadata from page_data if available/needed + # e.g., page_data.get('width'), page_data.get('height') + }, + ) + ) + else: + log.warning( + f"Skipping page due to missing 'markdown' or 'index'. Data: {page_data}" + ) + + if not documents: + # Case where pages existed but none had valid markdown/index + log.warning( + "OCR response contained pages, but none had valid content/index." + ) + return [ + Document( + page_content="No text content found in valid pages", metadata={} + ) + ] + + return documents + + except Exception as e: + log.error(f"An error occurred during the loading process: {e}") + # Return an empty list or a specific error document on failure + return [Document(page_content=f"Error during processing: {e}", metadata={})] + finally: + # 5. Delete file (attempt even if prior steps failed after upload) + if file_id: + try: + self._delete_file(file_id) + except Exception as del_e: + # Log deletion error, but don't overwrite original error if one occurred + log.error( + f"Cleanup error: Could not delete file ID {file_id}. Reason: {del_e}" + ) diff --git a/backend/requirements.txt b/backend/requirements.txt index 078d8d2d3..ca2ea5060 100644 --- a/backend/requirements.txt +++ b/backend/requirements.txt @@ -77,7 +77,6 @@ psutil sentencepiece soundfile==0.13.1 azure-ai-documentintelligence==1.0.0 -mistralai==1.6.0 pillow==11.1.0 opencv-python-headless==4.11.0.86