449 lines
16 KiB
Python
449 lines
16 KiB
Python
from fastapi import FastAPI, HTTPException, File, UploadFile, Depends, Security
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from fastapi.middleware.cors import CORSMiddleware
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from fastapi.responses import JSONResponse, StreamingResponse
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from fastapi.security import APIKeyHeader
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from ultralytics import YOLO
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import cv2
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import numpy as np
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import json
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import uvicorn
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from kafka import KafkaProducer, KafkaConsumer
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from redis import Redis
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import io
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import uuid
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import os
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from datetime import datetime, timedelta, timezone
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import threading
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import string
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app = FastAPI()
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fall_app = FastAPI()
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app.mount("/fall", fall_app)
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# CORS配置
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ALLOWED_ORIGINS = 'https://beta.obscura.work'
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# 只为主应用添加CORS中间件
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app.add_middleware(
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CORSMiddleware,
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allow_origins=ALLOWED_ORIGINS,
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allow_credentials=True,
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allow_methods=["*"],
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allow_headers=["*"],
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)
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# 配置
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MODEL_PATH = "/home/zydi/models/yolov8n-fall.pt" # 请替换为您的模型路径
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KAFKA_BROKER = "222.186.10.253:9092"
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KAFKA_TOPIC = "fall" # 指定Kafka topic
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KAFKA_GROUP_ID = "fall_group" # 指定消费者组ID
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REDIS_HOST = "222.186.10.253"
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REDIS_PORT = 6379
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REDIS_PASSWORD = "Obscura@2024"
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REDIS_DB = 4
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REDIS_API_DB = 12
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REDIS_API_USAGE_DB = 13
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UPLOAD_DIR = "/www/wwwroot/beta.obscura.work/upload_files/upload"
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RESULT_DIR = "/www/wwwroot/beta.obscura.work/upload_files/result"
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MAX_FILE_AGE = timedelta(hours=1)
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# 确保目录存在
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os.makedirs(UPLOAD_DIR, exist_ok=True)
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os.makedirs(RESULT_DIR, exist_ok=True)
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# 初始化 Kafka
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producer = KafkaProducer(bootstrap_servers=[KAFKA_BROKER])
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consumer = KafkaConsumer(
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KAFKA_TOPIC,
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bootstrap_servers=[KAFKA_BROKER],
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group_id=KAFKA_GROUP_ID,
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auto_offset_reset='earliest',
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enable_auto_commit=True,
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value_deserializer=lambda x: json.loads(x.decode('utf-8'))
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)
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# 初始化 Redis
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redis_client = Redis(
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host=REDIS_HOST,
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port=REDIS_PORT,
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password=REDIS_PASSWORD,
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db=REDIS_DB
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)
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redis_api_client = Redis(
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host=REDIS_HOST,
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port=REDIS_PORT,
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password=REDIS_PASSWORD,
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db=REDIS_API_DB
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)
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redis_api_usage_client = Redis(
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host=REDIS_HOST,
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port=REDIS_PORT,
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password=REDIS_PASSWORD,
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db=REDIS_API_USAGE_DB
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)
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# 定义API密钥头部
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api_key_header = APIKeyHeader(name="Authorization", auto_error=False)
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# 定义 base62 字符集
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BASE62 = string.digits + string.ascii_letters
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# 验证API密钥的函数
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async def get_api_key(api_key: str = Security(api_key_header)):
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if api_key and api_key.startswith("Bearer "):
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key = api_key.split(" ")[1]
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if key.startswith("obs-"):
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return key
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raise HTTPException(
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status_code=401,
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detail="无效的API密钥",
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headers={"WWW-Authenticate": "Bearer"},
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)
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def calculate_tokens(file_path: str, file_type: str) -> int:
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base_tokens = 0
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try:
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file_size = os.path.getsize(file_path) # 获取文件大小（字节）
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# 基础token：每MB文件大小消耗10个token
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base_tokens = int((file_size / (1024 * 1024)) * 10)
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if file_type == "image":
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img = cv2.imread(file_path)
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if img is None:
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raise ValueError("无法读取图片文件")
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height, width = img.shape[:2]
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pixel_count = height * width
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# 图片token：每100个像素额外消耗5个token
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image_tokens = int((pixel_count / 10000) * 5)
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base_tokens += image_tokens
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elif file_type == "video":
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cap = cv2.VideoCapture(file_path)
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if not cap.isOpened():
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raise ValueError("无法打开视频文件")
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fps = cap.get(cv2.CAP_PROP_FPS)
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frame_count = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
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width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
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height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
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cap.release()
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pixel_count = width * height * frame_count
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duration = frame_count / fps # 视频时长（秒）
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# 视频token：每100万像素每秒额外消耗1个token
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video_tokens = int((pixel_count / 10000) * (duration / 60))
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base_tokens += video_tokens
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return max(1, base_tokens) # 确保至少返回1个token
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except Exception as e:
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print(f"计算token时出错: {str(e)}")
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return 1 # 出错时返回默认值1
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async def verify_api_key(api_key: str = Depends(get_api_key)):
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redis_key = f"api_key:{api_key}"
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api_key_info = redis_api_client.hgetall(redis_key)
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if not api_key_info:
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raise HTTPException(status_code=401, detail="无效的API密钥")
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api_key_info = {k.decode('utf-8'): v.decode('utf-8') for k, v in api_key_info.items()}
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if api_key_info.get('is_active') != '1':
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raise HTTPException(status_code=401, detail="API密钥已停用")
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expires_at = datetime.fromisoformat(api_key_info.get('expires_at'))
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if datetime.now(timezone.utc) > expires_at:
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raise HTTPException(status_code=401, detail="API密钥已过期")
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usage_info = redis_api_usage_client.hgetall(redis_key)
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usage_info = {k.decode('utf-8'): v.decode('utf-8') for k, v in usage_info.items()}
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return {
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"api_key": api_key,
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**api_key_info,
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**usage_info
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}
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async def update_token_usage(api_key: str, new_tokens_used: int, model_name: str):
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redis_key = f"api_key:{api_key}"
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current_time = datetime.now(timezone.utc).isoformat()
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pipe = redis_api_usage_client.pipeline()
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# 更新总的token使用量
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pipe.hincrby(redis_key, "tokens_used", new_tokens_used)
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pipe.hset(redis_key, "last_used_at", current_time)
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# 更新特定模型的token使用量
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model_tokens_field = f"{model_name}_tokens_used"
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model_last_used_field = f"{model_name}_last_used_at"
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pipe.hincrby(redis_key, model_tokens_field, new_tokens_used)
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pipe.hset(redis_key, model_last_used_field, current_time)
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pipe.execute()
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class fallDetector:
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def __init__(self, model_path):
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self.model = YOLO(model_path)
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def detect(self, frame):
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results = self.model(frame)
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return results
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def format_results(self, results):
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formatted_results = []
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for r in results:
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if not hasattr(r, 'boxes') or len(r.boxes) == 0:
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print("没有检测到任何对象")
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return [{"message": "No objects detected"}]
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boxes = r.boxes
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names = getattr(r, 'names', {})
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for i in range(len(boxes)):
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box = boxes[i]
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if not hasattr(box, 'cls') or not hasattr(box, 'conf') or not hasattr(box, 'xyxy'):
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print(f"警告: 第 {i} 个框缺少必要的属性")
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continue
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try:
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class_id = int(box.cls.item())
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formatted_result = {
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"bbox": box.xyxy.tolist()[0],
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"confidence": box.conf.item(),
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"class_id": class_id,
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"class": names.get(class_id, f"Unknown-{class_id}")
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}
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formatted_results.append(formatted_result)
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except Exception as e:
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print(f"处理第 {i} 个框时出错: {str(e)}")
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# print("格式化后的结果:", formatted_results)
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return formatted_results
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def draw_results(self, frame, results):
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for r in results:
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annotated_frame = r.plot()
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return annotated_frame
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detector = fallDetector(MODEL_PATH)
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def process_image(image_data, filename):
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try:
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img = cv2.imdecode(np.frombuffer(image_data, np.uint8), cv2.IMREAD_COLOR)
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results = detector.detect(img)
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# Format results for JSON
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json_results = detector.format_results(results)
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# Draw results on image
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annotated_img = detector.draw_results(img, results)
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# Save annotated image
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annotated_filename = f"fall_{filename}"
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annotated_path = os.path.join(RESULT_DIR, annotated_filename)
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cv2.imwrite(annotated_path, annotated_img)
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return json_results, annotated_filename
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except Exception as e:
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print(f"Error processing image: {str(e)}")
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return None, None
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def process_video(video_data, filename):
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try:
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temp_video_path = os.path.join(UPLOAD_DIR, f"fall_{filename}")
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with open(temp_video_path, 'wb') as temp_video:
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temp_video.write(video_data)
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cap = cv2.VideoCapture(temp_video_path)
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frame_count = 0
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json_results = []
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# Get video properties
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fps = int(cap.get(cv2.CAP_PROP_FPS))
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width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
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height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
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# Create output video file
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annotated_filename = f"fall_{filename}"
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output_path = os.path.join(RESULT_DIR, annotated_filename)
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out = cv2.VideoWriter(output_path, cv2.VideoWriter_fourcc(*'mp4v'), fps, (width, height))
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while cap.isOpened():
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ret, frame = cap.read()
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if not ret:
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break
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results = detector.detect(frame)
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frame_json_results = detector.format_results(results)
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json_results.append({"frame": frame_count, "detections": frame_json_results})
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annotated_frame = detector.draw_results(frame, results)
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out.write(annotated_frame)
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frame_count += 1
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cap.release()
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out.release()
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# Clean up temporary input video file
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os.remove(temp_video_path)
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return json_results, annotated_filename
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except Exception as e:
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print(f"Error processing video: {str(e)}")
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return None, None
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@fall_app.post("/upload")
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async def upload_file(file: UploadFile = File(...), api_key_info: dict = Depends(verify_api_key)):
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content = await file.read()
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file_extension = os.path.splitext(file.filename)[1].lower()
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new_filename = f"{uuid.uuid4()}{file_extension}"
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# Save the original file
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original_file_path = os.path.join(UPLOAD_DIR, new_filename)
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with open(original_file_path, "wb") as f:
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f.write(content)
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# 计算 token
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file_type = "image" if file_extension in ['.jpg', '.jpeg', '.png'] else "video"
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tokens_required = calculate_tokens(original_file_path, file_type)
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if tokens_required is None or tokens_required <= 0:
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raise HTTPException(status_code=500, detail="无法计算所需的token数量")
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# 检查并更新 token 使用量
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api_key = api_key_info['api_key']
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usage_key = f"api_key:{api_key}"
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total_tokens = int(redis_api_usage_client.hget(usage_key, "total_tokens") or 0)
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tokens_used = int(redis_api_usage_client.hget(usage_key, "tokens_used") or 0)
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if tokens_used + tokens_required > total_tokens:
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raise HTTPException(status_code=403, detail="Token 余额不足")
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# 更新 token 使用量
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model_name = "yolov8n-fall"
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await update_token_usage(api_key, tokens_required, model_name)
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# Send processing task to Kafka
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producer.send(KAFKA_TOPIC, json.dumps({
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"filename": new_filename,
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"file_type": "image" if file_extension in ['.jpg', '.jpeg', '.png'] else "video"
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}).encode('utf-8'))
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# Set initial status in Redis
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redis_key = f"fall_result:{new_filename}"
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redis_client.set(redis_key, json.dumps({"status": "queued"}))
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# 获取更新后的 token 使用情况
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updated_api_key_info = await verify_api_key(api_key)
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new_tokens_used = int(updated_api_key_info.get("tokens_used", 0))
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model_tokens_used = int(updated_api_key_info.get(f"{model_name}_tokens_used", 0))
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return JSONResponse(content={
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"message": "文件已上传并排队等待处理",
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"filename": new_filename,
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"tokens_used": tokens_required,
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"total_tokens_used": new_tokens_used,
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f"{model_name}_tokens_used": model_tokens_used,
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"tokens_remaining": total_tokens - new_tokens_used
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})
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@fall_app.get("/result/{filename}", dependencies=[Depends(verify_api_key)])
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async def get_fall_result(filename: str):
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redis_key = f"fall_result:{filename}"
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result = redis_client.get(redis_key)
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if result:
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result_data = json.loads(result)
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return JSONResponse(content=result_data) # 直接返回整个结果，包括 status
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else:
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raise HTTPException(status_code=404, detail="Result not found")
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@fall_app.get("/annotated/{filename}", dependencies=[Depends(verify_api_key)])
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async def get_annotated_file(filename: str):
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redis_key = f"fall_result:{filename}"
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result = redis_client.get(redis_key)
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if result:
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result_data = json.loads(result)
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if result_data["status"] == "completed":
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annotated_filename = result_data["annotated_filename"]
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file_path = os.path.join(RESULT_DIR, annotated_filename)
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if os.path.exists(file_path):
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def iterfile():
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with open(file_path, mode="rb") as file_like:
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yield from file_like
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file_extension = os.path.splitext(annotated_filename)[1].lower()
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return StreamingResponse(iterfile(), media_type=f"image/{file_extension[1:]}" if file_extension in ['.jpg', '.jpeg', '.png'] else "video/mp4")
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raise HTTPException(status_code=404, detail="Annotated file not found")
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def process_task():
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for message in consumer:
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task = message.value
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filename = task['filename']
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file_type = task['file_type']
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file_path = os.path.join(UPLOAD_DIR, filename)
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# Update status to "processing"
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redis_key = f"fall_result:{filename}"
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redis_client.set(redis_key, json.dumps({"status": "processing"}))
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try:
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if file_type == "image":
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with open(file_path, 'rb') as f:
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content = f.read()
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json_results, annotated_filename = process_image(content, filename)
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else:
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with open(file_path, 'rb') as f:
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content = f.read()
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json_results, annotated_filename = process_video(content, filename)
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if json_results and annotated_filename:
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redis_client.set(redis_key, json.dumps({
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"json_results": json_results,
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"status": "completed",
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"annotated_filename": annotated_filename
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}))
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else:
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redis_client.set(redis_key, json.dumps({"status": "failed"}))
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except Exception as e:
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print(f"Error processing task: {str(e)}")
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redis_client.set(redis_key, json.dumps({"status": "failed", "error": str(e)}))
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def listen_redis_changes():
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pubsub = redis_client.pubsub()
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pubsub.psubscribe('__keyspace@3__:fall_result:*') # 监听所有fall_result键的变化
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for message in pubsub.listen():
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if message['type'] == 'pmessage':
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key = message['channel'].decode('utf-8').split(':')[-1]
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operation = message['data'].decode('utf-8')
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if operation == 'set':
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value = redis_client.get(f"fall_result:{key}")
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if value:
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result = json.loads(value)
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print(f"Status update for {key}: {result['status']}")
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# 这里可以添加其他处理逻辑，比如发送通知等
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if __name__ == "__main__":
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# 启动处理任务的线程
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threading.Thread(target=process_task, daemon=True).start()
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# 启动Redis监听线程
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threading.Thread(target=listen_redis_changes, daemon=True).start()
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uvicorn.run(app, host="0.0.0.0", port=7002) |