import os
import time
import requests
import logging
import json
from typing import List, Optional
from langchain_core.documents import Document
from fastapi import HTTPException, status
log = logging.getLogger(__name__)
class DatalabMarkerLoader:
def __init__(
self,
file_path: str,
api_key: str,
langs: Optional[str] = None,
use_llm: bool = False,
skip_cache: bool = False,
force_ocr: bool = False,
paginate: bool = False,
strip_existing_ocr: bool = False,
disable_image_extraction: bool = False,
output_format: str = None,
):
self.file_path = file_path
self.api_key = api_key
self.langs = langs
self.use_llm = use_llm
self.skip_cache = skip_cache
self.force_ocr = force_ocr
self.paginate = paginate
self.strip_existing_ocr = strip_existing_ocr
self.disable_image_extraction = disable_image_extraction
self.output_format = output_format
def _get_mime_type(self, filename: str) -> str:
ext = filename.rsplit(".", 1)[-1].lower()
mime_map = {
"pdf": "application/pdf",
"xls": "application/vnd.ms-excel",
"xlsx": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
"ods": "application/vnd.oasis.opendocument.spreadsheet",
"doc": "application/msword",
"docx": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
"odt": "application/vnd.oasis.opendocument.text",
"ppt": "application/vnd.ms-powerpoint",
"pptx": "application/vnd.openxmlformats-officedocument.presentationml.presentation",
"odp": "application/vnd.oasis.opendocument.presentation",
"html": "text/html",
"epub": "application/epub+zip",
"png": "image/png",
"jpeg": "image/jpeg",
"jpg": "image/jpeg",
"webp": "image/webp",
"gif": "image/gif",
"tiff": "image/tiff",
}
return mime_map.get(ext, "application/octet-stream")
def check_marker_request_status(self, request_id: str) -> dict:
url = f"https://www.datalab.to/api/v1/marker/{request_id}"
headers = {"X-Api-Key": self.api_key}
try:
response = requests.get(url, headers=headers)
response.raise_for_status()
result = response.json()
log.info(f"Marker API status check for request {request_id}: {result}")
return result
except requests.HTTPError as e:
log.error(f"Error checking Marker request status: {e}")
raise HTTPException(
status.HTTP_502_BAD_GATEWAY,
detail=f"Failed to check Marker request: {e}",
)
except ValueError as e:
log.error(f"Invalid JSON checking Marker request: {e}")
raise HTTPException(
status.HTTP_502_BAD_GATEWAY, detail=f"Invalid JSON: {e}"
)
def load(self) -> List[Document]:
url = "https://www.datalab.to/api/v1/marker"
filename = os.path.basename(self.file_path)
mime_type = self._get_mime_type(filename)
headers = {"X-Api-Key": self.api_key}
form_data = {
"langs": self.langs,
"use_llm": str(self.use_llm).lower(),
"skip_cache": str(self.skip_cache).lower(),
"force_ocr": str(self.force_ocr).lower(),
"paginate": str(self.paginate).lower(),
"strip_existing_ocr": str(self.strip_existing_ocr).lower(),
"disable_image_extraction": str(self.disable_image_extraction).lower(),
"output_format": self.output_format,
}
log.info(
f"Datalab Marker POST request parameters: {{'filename': '{filename}', 'mime_type': '{mime_type}', **{form_data}}}"
)
try:
with open(self.file_path, "rb") as f:
files = {"file": (filename, f, mime_type)}
response = requests.post(
url, data=form_data, files=files, headers=headers
)
response.raise_for_status()
result = response.json()
except FileNotFoundError:
raise HTTPException(
status.HTTP_404_NOT_FOUND, detail=f"File not found: {self.file_path}"
)
except requests.HTTPError as e:
raise HTTPException(
status.HTTP_400_BAD_REQUEST,
detail=f"Datalab Marker request failed: {e}",
)
except ValueError as e:
raise HTTPException(
status.HTTP_502_BAD_GATEWAY, detail=f"Invalid JSON response: {e}"
)
except Exception as e:
raise HTTPException(status.HTTP_500_INTERNAL_SERVER_ERROR, detail=str(e))
if not result.get("success"):
raise HTTPException(
status.HTTP_400_BAD_REQUEST,
detail=f"Datalab Marker request failed: {result.get('error', 'Unknown error')}",
)
check_url = result.get("request_check_url")
request_id = result.get("request_id")
if not check_url:
raise HTTPException(
status.HTTP_502_BAD_GATEWAY, detail="No request_check_url returned."
)
for _ in range(300): # Up to 10 minutes
time.sleep(2)
try:
poll_response = requests.get(check_url, headers=headers)
poll_response.raise_for_status()
poll_result = poll_response.json()
except (requests.HTTPError, ValueError) as e:
raw_body = poll_response.text
log.error(f"Polling error: {e}, response body: {raw_body}")
raise HTTPException(
status.HTTP_502_BAD_GATEWAY, detail=f"Polling failed: {e}"
)
status_val = poll_result.get("status")
success_val = poll_result.get("success")
if status_val == "complete":
summary = {
k: poll_result.get(k)
for k in (
"status",
"output_format",
"success",
"error",
"page_count",
"total_cost",
)
}
log.info(
f"Marker processing completed successfully: {json.dumps(summary, indent=2)}"
)
break
if status_val == "failed" or success_val is False:
log.error(
f"Marker poll failed full response: {json.dumps(poll_result, indent=2)}"
)
error_msg = (
poll_result.get("error")
or "Marker returned failure without error message"
)
raise HTTPException(
status.HTTP_400_BAD_REQUEST,
detail=f"Marker processing failed: {error_msg}",
)
else:
raise HTTPException(
status.HTTP_504_GATEWAY_TIMEOUT, detail="Marker processing timed out"
)
if not poll_result.get("success", False):
error_msg = poll_result.get("error") or "Unknown processing error"
raise HTTPException(
status.HTTP_400_BAD_REQUEST,
detail=f"Final processing failed: {error_msg}",
)
content_key = self.output_format.lower()
raw_content = poll_result.get(content_key)
if content_key == "json":
full_text = json.dumps(raw_content, indent=2)
elif content_key in {"markdown", "html"}:
full_text = str(raw_content).strip()
else:
raise HTTPException(
status.HTTP_400_BAD_REQUEST,
detail=f"Unsupported output format: {self.output_format}",
)
if not full_text:
raise HTTPException(
status.HTTP_400_BAD_REQUEST,
detail="Datalab Marker returned empty content",
)
marker_output_dir = os.path.join("/app/backend/data/uploads", "marker_output")
os.makedirs(marker_output_dir, exist_ok=True)
file_ext_map = {"markdown": "md", "json": "json", "html": "html"}
file_ext = file_ext_map.get(content_key, "txt")
output_filename = f"{os.path.splitext(filename)[0]}.{file_ext}"
output_path = os.path.join(marker_output_dir, output_filename)
try:
with open(output_path, "w", encoding="utf-8") as f:
f.write(full_text)
log.info(f"Saved Marker output to: {output_path}")
except Exception as e:
log.warning(f"Failed to write marker output to disk: {e}")
metadata = {
"source": filename,
"output_format": poll_result.get("output_format", self.output_format),
"page_count": poll_result.get("page_count", 0),
"processed_with_llm": self.use_llm,
"request_id": request_id or "",
}
images = poll_result.get("images", {})
if images:
metadata["image_count"] = len(images)
metadata["images"] = json.dumps(list(images.keys()))
for k, v in metadata.items():
if isinstance(v, (dict, list)):
metadata[k] = json.dumps(v)
elif v is None:
metadata[k] = ""
return [Document(page_content=full_text, metadata=metadata)]