247 lines
8.4 KiB
Python
247 lines
8.4 KiB
Python
import hashlib
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import time
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from yuxi.knowledge.chunking.ragflow_like.presets import resolve_chunk_processing_params
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from yuxi.utils import hashstr, logger
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from yuxi.utils.datetime_utils import utc_isoformat
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_DROPPED_PROCESSING_PARAM_KEYS = {
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"_preprocessed_map",
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"auto_index",
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"content_hashes",
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"file_sizes",
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"enable_ocr",
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}
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def sanitize_processing_params(params: dict | None) -> dict | None:
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"""移除不应写入单文件元数据的参数。"""
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if not params:
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return None
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return {key: value for key, value in params.items() if key not in _DROPPED_PROCESSING_PARAM_KEYS}
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def resolve_processing_params(
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kb_additional_params: dict | None,
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file_processing_params: dict | None,
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request_params: dict | None = None,
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) -> dict:
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merged_params = sanitize_processing_params(merge_processing_params(file_processing_params, request_params)) or {}
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merged_params["ocr_engine"] = merged_params.get("ocr_engine") or "disable"
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if not isinstance(merged_params.get("ocr_engine_config"), dict):
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merged_params["ocr_engine_config"] = {}
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chunk_params = resolve_chunk_processing_params(
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kb_additional_params=kb_additional_params,
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file_processing_params=file_processing_params,
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request_params=request_params,
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)
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merged_params.update(chunk_params)
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return merged_params
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async def calculate_content_hash(data: bytes | bytearray) -> str:
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"""计算文件内容的 SHA-256 哈希值。"""
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sha256 = hashlib.sha256()
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sha256.update(data)
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return sha256.hexdigest()
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async def prepare_item_metadata(item: str, content_type: str, kb_id: str, params: dict | None = None) -> dict:
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"""
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准备 MinIO 文件元数据；URL 导入需先通过 fetch-url 预处理为 MinIO 文件。
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Args:
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item: MinIO URL
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content_type: 内容类型，目前仅支持 "file"
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kb_id: 数据库ID
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params: 处理参数，可选
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"""
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# 检查是否有预处理信息 (针对 URL 转 HTML 文件的情况)
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if params and "_preprocessed_map" in params and item in params["_preprocessed_map"]:
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pre_info = params["_preprocessed_map"][item]
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# 使用预处理信息
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filename = pre_info.get("filename", item) # 通常是原始 URL
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# 截断文件名以适应数据库限制 (512 chars)，保留部分后缀信息如果可能
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if len(filename) > 500:
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filename_display = filename[:400] + "..." + filename[-90:]
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else:
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filename_display = filename
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file_type = "html" # 强制转换为 html 类型，以便后续作为文件处理
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item_path = pre_info["path"] # MinIO path
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content_hash = pre_info["content_hash"]
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# 使用 item(url) 生成 ID，保证同一 URL 即使多次添加 ID 也不同（配合 time）
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# 或者我们应该基于 hash？不，基于 time 更符合上传逻辑
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file_id = f"file_{hashstr(item + str(time.time()), 6)}"
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metadata = {
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"kb_id": kb_id,
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"filename": filename_display,
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"path": item_path,
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"file_type": file_type,
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"status": "indexing",
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"created_at": utc_isoformat(),
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"file_id": file_id,
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"content_hash": content_hash,
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"size": pre_info.get("file_size"),
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"parent_id": params.get("parent_id"),
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}
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if params:
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safe_params = sanitize_processing_params(params) or {}
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# 覆盖 content_type 为 file，确保后续解析走文件流程（MinIO 下载 -> HTML 解析）
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# 而不是再次尝试作为 URL 抓取
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safe_params["content_type"] = "file"
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safe_params["original_source"] = item # 保存完整 URL 到 JSON 字段，避免数据库字段长度限制
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metadata["processing_params"] = safe_params
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return metadata
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if content_type == "file":
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if not is_minio_url(item):
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raise ValueError(f"File source must be a MinIO URL: {item}")
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logger.debug(f"Processing MinIO file: {item}")
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_, object_name = parse_minio_url(item)
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filename = object_name.rsplit("/", 1)[-1]
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import re
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timestamp_pattern = r"^(.+)_(\d{13})(\.[^.]+)$"
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match = re.match(timestamp_pattern, filename)
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filename_display = match.group(1) + match.group(3) if match else filename
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file_type = filename.split(".")[-1].lower() if "." in filename else ""
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item_path = item
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content_hash = None
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if params and "content_hashes" in params and isinstance(params["content_hashes"], dict):
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content_hash = params["content_hashes"].get(item)
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if not content_hash:
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raise ValueError(f"Missing content_hash for file: {item}")
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file_sizes = params.get("file_sizes") if params else None
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if not isinstance(file_sizes, dict):
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file_sizes = {}
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file_size = file_sizes.get(item)
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file_id = f"file_{hashstr(str(item_path) + str(time.time()), 6)}"
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else:
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raise ValueError(f"Unsupported content_type: {content_type}")
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metadata = {
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"kb_id": kb_id,
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"filename": filename_display, # 使用显示用的文件名
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"path": item_path,
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"file_type": file_type,
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"status": "indexing",
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"created_at": utc_isoformat(),
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"file_id": file_id,
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"content_hash": content_hash,
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"size": file_size,
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"parent_id": params.get("parent_id") if params else None,
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}
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# 保存处理参数到元数据
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if params:
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metadata["processing_params"] = sanitize_processing_params(params)
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return metadata
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def merge_processing_params(metadata_params: dict | None, request_params: dict | None) -> dict:
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"""
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合并处理参数：优先使用请求参数，缺失时使用元数据中的参数
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Args:
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metadata_params: 元数据中保存的参数
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request_params: 请求中提供的参数
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Returns:
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dict: 合并后的参数
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"""
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merged_params = {}
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# 首先使用元数据中的参数作为默认值
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if metadata_params:
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merged_params.update(metadata_params)
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# 然后使用请求参数覆盖（如果提供）
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if request_params:
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merged_params.update(request_params)
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logger.debug(f"Merged processing params: {metadata_params=}, {request_params=}, {merged_params=}")
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return merged_params
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def is_minio_url(file_path: str) -> bool:
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"""检测是否是本系统生成的 MinIO 存储 URL。"""
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from urllib.parse import urlparse
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parsed_url = urlparse(file_path)
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if parsed_url.scheme == "minio":
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return bool(parsed_url.netloc and parsed_url.path.lstrip("/"))
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if parsed_url.scheme not in {"http", "https"} or not parsed_url.netloc:
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return False
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path_parts = parsed_url.path.lstrip("/").split("/", 1)
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if len(path_parts) != 2:
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return False
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from yuxi.storage.minio.client import MinIOClient
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known_buckets = set(MinIOClient.KB_BUCKETS.values()) | MinIOClient.PUBLIC_READ_BUCKETS
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return path_parts[0] in known_buckets
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def parse_minio_url(file_path: str) -> tuple[str, str]:
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"""
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解析MinIO URL，提取bucket名称和对象名称
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支持标准 HTTP/HTTPS URL 格式：
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- http(s)://host/bucket-name/path/to/object
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Args:
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file_path: MinIO文件URL (http:// 或 https://)
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Returns:
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tuple[str, str]: (bucket_name, object_name)
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Raises:
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ValueError: 如果无法解析URL
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"""
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try:
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from urllib.parse import unquote, urlparse
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# 解析URL
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parsed_url = urlparse(file_path)
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# 对于 minio:// 协议，bucket名称在netloc中
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if parsed_url.scheme == "minio":
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bucket_name = parsed_url.netloc
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object_name = unquote(parsed_url.path.lstrip("/"))
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else:
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# 对于 http/https 协议，bucket名称在path的第一部分
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object_name = parsed_url.path.lstrip("/")
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path_parts = object_name.split("/", 1)
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if len(path_parts) > 1:
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bucket_name = path_parts[0]
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object_name = unquote(path_parts[1])
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else:
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raise ValueError(f"无法解析MinIO URL中的bucket名称: {file_path}")
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logger.debug(f"Parsed MinIO URL: bucket_name={bucket_name}, object_name={object_name}")
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return bucket_name, object_name
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except Exception as e:
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logger.error(f"Failed to parse MinIO URL {file_path}: {e}")
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raise ValueError(f"无法解析MinIO URL: {file_path}")
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