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https://git.mirrors.martin98.com/https://github.com/langgenius/dify.git
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226 lines
9.1 KiB
Python
226 lines
9.1 KiB
Python
import re
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from collections.abc import Mapping, Sequence
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from typing import Any, Union
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from urllib.parse import parse_qs, urlparse
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import requests
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from core.file.file_obj import FileBelongsTo, FileExtraConfig, FileTransferMethod, FileType, FileVar
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from extensions.ext_database import db
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from models.account import Account
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from models.model import EndUser, MessageFile, UploadFile
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from services.file_service import IMAGE_EXTENSIONS
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class MessageFileParser:
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def __init__(self, tenant_id: str, app_id: str) -> None:
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self.tenant_id = tenant_id
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self.app_id = app_id
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def validate_and_transform_files_arg(
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self, files: Sequence[Mapping[str, Any]], file_extra_config: FileExtraConfig, user: Union[Account, EndUser]
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) -> list[FileVar]:
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"""
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validate and transform files arg
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:param files:
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:param file_extra_config:
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:param user:
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:return:
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"""
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for file in files:
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if not isinstance(file, dict):
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raise ValueError("Invalid file format, must be dict")
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if not file.get("type"):
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raise ValueError("Missing file type")
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FileType.value_of(file.get("type"))
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if not file.get("transfer_method"):
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raise ValueError("Missing file transfer method")
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FileTransferMethod.value_of(file.get("transfer_method"))
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if file.get("transfer_method") == FileTransferMethod.REMOTE_URL.value:
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if not file.get("url"):
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raise ValueError("Missing file url")
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if not file.get("url").startswith("http"):
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raise ValueError("Invalid file url")
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if file.get("transfer_method") == FileTransferMethod.LOCAL_FILE.value and not file.get("upload_file_id"):
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raise ValueError("Missing file upload_file_id")
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if file.get("transform_method") == FileTransferMethod.TOOL_FILE.value and not file.get("tool_file_id"):
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raise ValueError("Missing file tool_file_id")
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# transform files to file objs
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type_file_objs = self._to_file_objs(files, file_extra_config)
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# validate files
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new_files = []
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for file_type, file_objs in type_file_objs.items():
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if file_type == FileType.IMAGE:
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# parse and validate files
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image_config = file_extra_config.image_config
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# check if image file feature is enabled
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if not image_config:
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continue
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# Validate number of files
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if len(files) > image_config["number_limits"]:
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raise ValueError(f"Number of image files exceeds the maximum limit {image_config['number_limits']}")
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for file_obj in file_objs:
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# Validate transfer method
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if file_obj.transfer_method.value not in image_config["transfer_methods"]:
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raise ValueError(f"Invalid transfer method: {file_obj.transfer_method.value}")
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# Validate file type
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if file_obj.type != FileType.IMAGE:
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raise ValueError(f"Invalid file type: {file_obj.type}")
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if file_obj.transfer_method == FileTransferMethod.REMOTE_URL:
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# check remote url valid and is image
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result, error = self._check_image_remote_url(file_obj.url)
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if result is False:
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raise ValueError(error)
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elif file_obj.transfer_method == FileTransferMethod.LOCAL_FILE:
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# get upload file from upload_file_id
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upload_file = (
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db.session.query(UploadFile)
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.filter(
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UploadFile.id == file_obj.related_id,
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UploadFile.tenant_id == self.tenant_id,
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UploadFile.created_by == user.id,
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UploadFile.created_by_role == ("account" if isinstance(user, Account) else "end_user"),
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UploadFile.extension.in_(IMAGE_EXTENSIONS),
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)
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.first()
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)
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# check upload file is belong to tenant and user
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if not upload_file:
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raise ValueError("Invalid upload file")
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new_files.append(file_obj)
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# return all file objs
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return new_files
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def transform_message_files(self, files: list[MessageFile], file_extra_config: FileExtraConfig):
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"""
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transform message files
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:param files:
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:param file_extra_config:
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:return:
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"""
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# transform files to file objs
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type_file_objs = self._to_file_objs(files, file_extra_config)
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# return all file objs
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return [file_obj for file_objs in type_file_objs.values() for file_obj in file_objs]
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def _to_file_objs(
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self, files: list[Union[dict, MessageFile]], file_extra_config: FileExtraConfig
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) -> dict[FileType, list[FileVar]]:
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"""
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transform files to file objs
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:param files:
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:param file_extra_config:
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:return:
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"""
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type_file_objs: dict[FileType, list[FileVar]] = {
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# Currently only support image
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FileType.IMAGE: []
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}
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if not files:
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return type_file_objs
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# group by file type and convert file args or message files to FileObj
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for file in files:
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if isinstance(file, MessageFile):
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if file.belongs_to == FileBelongsTo.ASSISTANT.value:
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continue
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file_obj = self._to_file_obj(file, file_extra_config)
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if file_obj.type not in type_file_objs:
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continue
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type_file_objs[file_obj.type].append(file_obj)
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return type_file_objs
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def _to_file_obj(self, file: Union[dict, MessageFile], file_extra_config: FileExtraConfig):
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"""
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transform file to file obj
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:param file:
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:return:
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"""
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if isinstance(file, dict):
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transfer_method = FileTransferMethod.value_of(file.get("transfer_method"))
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if transfer_method != FileTransferMethod.TOOL_FILE:
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return FileVar(
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tenant_id=self.tenant_id,
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type=FileType.value_of(file.get("type")),
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transfer_method=transfer_method,
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url=file.get("url") if transfer_method == FileTransferMethod.REMOTE_URL else None,
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related_id=file.get("upload_file_id") if transfer_method == FileTransferMethod.LOCAL_FILE else None,
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extra_config=file_extra_config,
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)
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return FileVar(
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tenant_id=self.tenant_id,
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type=FileType.value_of(file.get("type")),
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transfer_method=transfer_method,
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url=None,
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related_id=file.get("tool_file_id"),
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extra_config=file_extra_config,
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)
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else:
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return FileVar(
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id=file.id,
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tenant_id=self.tenant_id,
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type=FileType.value_of(file.type),
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transfer_method=FileTransferMethod.value_of(file.transfer_method),
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url=file.url,
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related_id=file.upload_file_id or None,
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extra_config=file_extra_config,
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)
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def _check_image_remote_url(self, url):
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try:
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headers = {
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"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko)"
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" Chrome/91.0.4472.124 Safari/537.36"
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}
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def is_s3_presigned_url(url):
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try:
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parsed_url = urlparse(url)
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if "amazonaws.com" not in parsed_url.netloc:
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return False
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query_params = parse_qs(parsed_url.query)
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required_params = ["Signature", "Expires"]
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for param in required_params:
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if param not in query_params:
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return False
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if not query_params["Expires"][0].isdigit():
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return False
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signature = query_params["Signature"][0]
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if not re.match(r"^[A-Za-z0-9+/]+={0,2}$", signature):
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return False
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return True
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except Exception:
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return False
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if is_s3_presigned_url(url):
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response = requests.get(url, headers=headers, allow_redirects=True)
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if response.status_code in {200, 304}:
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return True, ""
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response = requests.head(url, headers=headers, allow_redirects=True)
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if response.status_code in {200, 304}:
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return True, ""
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else:
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return False, "URL does not exist."
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except requests.RequestException as e:
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return False, f"Error checking URL: {e}"
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