内容安全审核
This commit is contained in:
343
service/file_service.py
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343
service/file_service.py
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import os
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import re
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import shutil
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from datetime import datetime
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from PIL import ImageDraw, ImageFont
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from fastapi import UploadFile
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import cv2
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from PIL import Image
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import numpy as np
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# 上传根目录
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UPLOAD_ROOT = "upload"
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PRE = "/api/file/download/"
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# 确保上传根目录存在
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os.makedirs(UPLOAD_ROOT, exist_ok=True)
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def save_detect_file(client_ip: str, image_np: np.ndarray, file_type: str) -> str:
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"""保存numpy数组格式的PNG图片到detect目录，返回下载路径"""
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today = datetime.now()
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year = today.strftime("%Y")
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month = today.strftime("%m")
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day = today.strftime("%d")
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# 构建目录路径: upload/detect/客户端IP/type/年/月/日（包含UPLOAD_ROOT）
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file_dir = os.path.join(
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UPLOAD_ROOT,
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"detect",
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client_ip,
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file_type,
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year,
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month,
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day
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)
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# 创建目录（确保目录存在）
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os.makedirs(file_dir, exist_ok=True)
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# 生成当前时间戳作为文件名，确保唯一性
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timestamp = datetime.now().strftime("%Y%m%d%H%M%S%f")
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filename = f"{timestamp}.png"
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# 1. 完整路径：用于实际保存文件（包含UPLOAD_ROOT）
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full_path = os.path.join(file_dir, filename)
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# 2. 相对路径：用于返回给前端（移除UPLOAD_ROOT前缀）
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relative_path = full_path.replace(UPLOAD_ROOT, "", 1).lstrip(os.sep)
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# 保存numpy数组为PNG图片
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try:
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# -------- 新增/修改：处理颜色通道和数据类型 --------
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# 1. 数据类型转换：确保是uint8（若为float32且范围0-1，需转成0-255的uint8）
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if image_np.dtype != np.uint8:
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image_np = (image_np * 255).astype(np.uint8)
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# 2. 通道顺序转换：若为OpenCV的BGR格式，转成PIL需要的RGB格式
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image_rgb = cv2.cvtColor(image_np, cv2.COLOR_BGR2RGB)
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# 3. 转换为PIL Image并保存
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img = Image.fromarray(image_rgb)
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img.save(full_path, format='PNG')
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except Exception as e:
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# 处理可能的异常（如数组格式不正确）
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raise Exception(f"保存图片失败: {str(e)}")
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# 统一路径分隔符为/，拼接前缀返回
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return PRE + relative_path.replace(os.sep, "/")
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def save_detect_yolo_file(
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client_ip: str,
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image_np: np.ndarray,
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detection_results: list,
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file_type: str = "yolo"
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) -> str:
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print("......................")
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"""
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保存YOLO检测结果图片（在原图上绘制边界框+标签），返回前端可访问的下载路径
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"""
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# 输入参数验证
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if not isinstance(image_np, np.ndarray):
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raise ValueError(f"输入image_np必须是numpy数组，当前类型：{type(image_np)}")
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if image_np.ndim != 3 or image_np.shape[-1] != 3:
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raise ValueError(f"输入图像必须是 (h, w, 3) 的BGR数组，当前shape：{image_np.shape}")
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if not isinstance(detection_results, list):
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raise ValueError(f"detection_results必须是列表，当前类型：{type(detection_results)}")
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for idx, result in enumerate(detection_results):
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required_keys = {"class", "confidence", "bbox"}
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if not isinstance(result, dict) or not required_keys.issubset(result.keys()):
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raise ValueError(
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f"detection_results第{idx}个元素格式错误，需包含键：{required_keys}，"
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f"当前元素：{result}"
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)
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bbox = result["bbox"]
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if not (isinstance(bbox, (tuple, list)) and len(bbox) == 4 and all(isinstance(x, int) for x in bbox)):
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raise ValueError(
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f"detection_results第{idx}个元素的bbox格式错误，需为(x1,y1,x2,y2)整数元组，"
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f"当前bbox：{bbox}"
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)
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#图像预处理（数据类型+通道）
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draw_image = image_np.copy()
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if draw_image.dtype != np.uint8:
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draw_image = np.clip(draw_image * 255, 0, 255).astype(np.uint8)
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#绘制边界框+标签
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# 遍历所有检测结果，逐个绘制
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for result in detection_results:
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class_name = result["class"]
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confidence = result["confidence"]
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x1, y1, x2, y2 = result["bbox"]
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cv2.rectangle(draw_image, (x1, y1), (x2, y2), color=(0, 255, 0), thickness=2)
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label = f"{class_name}: {confidence:.2f}"
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font = cv2.FONT_HERSHEY_SIMPLEX
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font_scale = 0.5
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font_thickness = 2
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(label_width, label_height), baseline = cv2.getTextSize(
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label, font, font_scale, font_thickness
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)
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bg_top_left = (x1, y1 - label_height - 10)
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bg_bottom_right = (x1 + label_width, y1)
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if bg_top_left[1] < 0:
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bg_top_left = (x1, 0)
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bg_bottom_right = (x1 + label_width, label_height + 10)
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cv2.rectangle(draw_image, bg_top_left, bg_bottom_right, color=(0, 0, 0), thickness=-1)
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text_origin = (x1, y1 - 5)
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if bg_top_left[1] == 0:
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text_origin = (x1, label_height + 5)
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cv2.putText(
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draw_image, label, text_origin,
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font, font_scale, color=(255, 255, 255), thickness=font_thickness
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)
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#保存图片
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try:
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today = datetime.now()
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year = today.strftime("%Y")
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month = today.strftime("%m")
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day = today.strftime("%d")
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file_dir = os.path.join(
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UPLOAD_ROOT, "detect", client_ip, file_type, year, month, day
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)
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#创建目录（若不存在则创建，支持多级目录）
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os.makedirs(file_dir, exist_ok=True)
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#生成唯一文件名
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timestamp = today.strftime("%Y%m%d%H%M%S%f")
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filename = f"{timestamp}.png"
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# 4.4 构建完整保存路径和前端访问路径
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full_path = os.path.join(file_dir, filename) # 本地完整路径
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# 相对路径：移除UPLOAD_ROOT前缀，统一用"/"作为分隔符（兼容Windows/Linux）
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relative_path = full_path.replace(UPLOAD_ROOT, "", 1).lstrip(os.sep)
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download_path = PRE + relative_path.replace(os.sep, "/")
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# 4.5 保存图片（CV2绘制的是BGR，需转RGB后用PIL保存，与原逻辑一致）
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image_rgb = cv2.cvtColor(draw_image, cv2.COLOR_BGR2RGB)
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img_pil = Image.fromarray(image_rgb)
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img_pil.save(full_path, format="PNG", quality=95) # PNG格式无压缩，quality可忽略
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print(f"YOLO检测图片保存成功 | 本地路径：{full_path} | 下载路径：{download_path}")
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return download_path
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except Exception as e:
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raise Exception(f"YOLO检测图片保存失败：{str(e)}") from e
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def save_detect_face_file(
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client_ip: str,
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image_np: np.ndarray,
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face_result: str,
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file_type: str = "face",
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matched_color: tuple = (0, 255, 0)
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) -> str:
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"""
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保存人脸识别结果图片（仅为「匹配成功」的人脸画框，标签不包含“匹配”二字）
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"""
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#输入参数验证
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if not isinstance(image_np, np.ndarray) or image_np.ndim != 3 or image_np.shape[-1] != 3:
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raise ValueError(f"输入图像需为 (h, w, 3) 的BGR数组，当前shape：{image_np.shape}")
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if not isinstance(face_result, str) or face_result.strip() == "":
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raise ValueError("face_result必须是非空字符串")
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# 解析face_result提取人脸信息
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face_info_list = []
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if face_result.strip() != "未检测到人脸":
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face_pattern = re.compile(
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r"(匹配|未匹配):\s*([^\s(]+)\s*\(相似度:\s*(\d+\.\d+),\s*边界框:\s*\[(\d+,\s*\d+,\s*\d+,\s*\d+)\]\)"
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)
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for part in [p.strip() for p in face_result.split(";") if p.strip()]:
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match = face_pattern.match(part)
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if match:
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status, name, similarity, bbox_str = match.groups()
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bbox = list(map(int, bbox_str.replace(" ", "").split(",")))
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if len(bbox) == 4:
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face_info_list.append({
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"status": status,
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"name": name,
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"similarity": float(similarity),
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"bbox": bbox
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})
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# 图像格式转换（OpenCV→PIL）
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image_rgb = cv2.cvtColor(image_np, cv2.COLOR_BGR2RGB)
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pil_img = Image.fromarray(image_rgb)
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draw = ImageDraw.Draw(pil_img)
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# 绘制边界框和标签
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font_size = 12
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try:
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font = ImageFont.truetype("simhei", font_size)
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except:
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try:
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font = ImageFont.truetype("simsun", font_size)
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except:
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font = ImageFont.load_default()
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print("警告：未找到指定中文字体，使用PIL默认字体（可能影响中文显示）")
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for face_info in face_info_list:
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status = face_info["status"]
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if status != "匹配":
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print(f"跳过未匹配人脸：{face_info['name']}（相似度：{face_info['similarity']:.2f}）")
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continue
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name = face_info["name"]
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similarity = face_info["similarity"]
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x1, y1, x2, y2 = face_info["bbox"]
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# 4.1 绘制边界框（绿色）
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img_cv = cv2.cvtColor(np.array(pil_img), cv2.COLOR_RGB2BGR)
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cv2.rectangle(img_cv, (x1, y1), (x2, y2), color=matched_color, thickness=2)
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pil_img = Image.fromarray(cv2.cvtColor(img_cv, cv2.COLOR_BGR2RGB))
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draw = ImageDraw.Draw(pil_img)
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label = f"{name} (相似度: {similarity:.2f})"
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# 4.3 计算标签尺寸（文本变短后会自动适配，无需额外调整）
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label_bbox = draw.textbbox((0, 0), label, font=font)
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label_width = label_bbox[2] - label_bbox[0]
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label_height = label_bbox[3] - label_bbox[1]
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# 4.4 计算标签背景位置（避免超出图像）
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bg_x1, bg_y1 = x1, y1 - label_height - 10
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bg_x2, bg_y2 = x1 + label_width, y1
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if bg_y1 < 0:
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bg_y1, bg_y2 = y2 + 5, y2 + label_height + 15
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# 4.5 绘制标签背景（黑色）和文本（白色）
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draw.rectangle([(bg_x1, bg_y1), (bg_x2, bg_y2)], fill=(0, 0, 0))
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text_x = bg_x1
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text_y = bg_y1 if bg_y1 >= 0 else bg_y1 + label_height
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draw.text((text_x, text_y), label, font=font, fill=(255, 255, 255))
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#保存图片
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try:
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today = datetime.now()
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file_dir = os.path.join(
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UPLOAD_ROOT, "detect", client_ip, file_type,
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today.strftime("%Y"), today.strftime("%m"), today.strftime("%d")
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)
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os.makedirs(file_dir, exist_ok=True)
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timestamp = today.strftime("%Y%m%d%H%M%S%f")
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filename = f"{timestamp}.png"
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full_path = os.path.join(file_dir, filename)
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pil_img.save(full_path, format="PNG", quality=100)
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relative_path = full_path.replace(UPLOAD_ROOT, "", 1).lstrip(os.sep)
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download_path = PRE + relative_path.replace(os.sep, "/")
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matched_count = sum(1 for info in face_info_list if info["status"] == "匹配")
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print(f"人脸检测图片保存成功 | 客户端IP：{client_ip} | 匹配人脸数：{matched_count} | 保存路径：{download_path}")
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return download_path
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except Exception as e:
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raise Exception(f"人脸检测图片保存失败（客户端IP：{client_ip}）：{str(e)}") from e
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def save_source_file(upload_file: UploadFile, file_type: str) -> str:
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"""保存上传的文件到source目录，返回下载路径"""
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today = datetime.now()
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year = today.strftime("%Y")
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month = today.strftime("%m")
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day = today.strftime("%d")
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# 生成精确到微秒的时间戳，确保文件名唯一
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timestamp = today.strftime("%Y%m%d%H%M%S%f")
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# 构建新文件名：时间戳_原文件名
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unique_filename = f"{timestamp}_{upload_file.filename}"
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# 构建目录路径: upload/source/type/年/月/日（包含UPLOAD_ROOT）
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file_dir = os.path.join(
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UPLOAD_ROOT,
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"source",
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file_type,
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year,
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month,
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day
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)
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# 创建目录（确保目录存在）
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os.makedirs(file_dir, exist_ok=True)
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# 1. 完整路径：用于实际保存文件（使用带时间戳的唯一文件名）
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full_path = os.path.join(file_dir, unique_filename)
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# 2. 相对路径：用于返回给前端
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relative_path = full_path.replace(UPLOAD_ROOT, "", 1).lstrip(os.sep)
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# 保存文件（使用完整路径）
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try:
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with open(full_path, "wb") as buffer:
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shutil.copyfileobj(upload_file.file, buffer)
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finally:
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upload_file.file.close()
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# 统一路径分隔符为/
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return PRE + relative_path.replace(os.sep, "/")
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def get_absolute_path(relative_path: str) -> str:
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"""
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根据相对路径获取服务器上的绝对路径
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"""
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path_without_pre = relative_path.replace(PRE, "", 1)
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# 将相对路径转换为系统兼容的格式
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normalized_path = os.path.normpath(path_without_pre)
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# 拼接基础路径和相对路径，得到绝对路径
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absolute_path = os.path.abspath(os.path.join(UPLOAD_ROOT, normalized_path))
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# 安全检查：确保生成的路径在UPLOAD_ROOT目录下，防止路径遍历
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if not absolute_path.startswith(os.path.abspath(UPLOAD_ROOT)):
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raise ValueError("无效的相对路径，可能试图访问上传目录之外的内容")
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return absolute_path
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