Update main.py
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main.py
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app = FastAPI(
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docs_url=None,
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redoc_url=None,
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# 允许跨域
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app.add_middleware(
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CORSMiddleware,
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allow_origins=["*"],
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allow_methods=["*"],
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allow_headers=["*"],
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)
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slider = Slider()
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@app.get("/")
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def hello_captcha():
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return {"Hello": "Captcha", "status": "running"}
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@app.get("/health")
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def health():
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return {"status": "ok"}
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message: str = None
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@app.post("/captcha", response_model=DetectionResult)
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async def captcha(file: UploadFile = File(...)):
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contents = await file.read()
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image = cv2.imdecode(nparr, cv2.IMREAD_COLOR)
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if image is None:
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return
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gc.collect()
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return
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@app.post("/captcha/base64", response_model=DetectionResult)
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async def captcha_base64(data: dict):
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"""
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import base64
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image_b64 = data.get("image", "")
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if not image_b64:
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return DetectionResult(box=[], confidence=0, message="缺少image参数")
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# 去掉base64头(如果有)
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if "," in image_b64:
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image_b64 = image_b64.split(",")[1]
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try:
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image_bytes = base64.b64decode(image_b64)
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nparr = np.frombuffer(image_bytes, np.uint8)
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image = cv2.imdecode(nparr, cv2.IMREAD_COLOR)
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except Exception as e:
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return DetectionResult(box=[], confidence=0, message=f"base64解码失败: {str(e)}")
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return
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if __name__ == "__main__":
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import uvicorn
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port = int(os.environ.get("PORT", 7860))
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uvicorn.run(app, host="0.0.0.0", port=port)
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"""
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滑块验证码识别 API 服务
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========================
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基于 FastAPI + ONNX 模型,提供 HTTP 接口识别滑块验证码的滑块和缺口位置。
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接口说明:
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GET / - 健康检查
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GET /health - 健康检查
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POST /captcha - 旧版:上传图片文件,只返回缺口(向后兼容)
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POST /captcha/base64 - 旧版:上传 base64 图片,只返回缺口
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POST /captcha/v2 - 新版:上传图片文件,返回滑块+缺口+偏移量
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POST /captcha/v2/base64 - 新版:上传 base64 图片,返回滑块+缺口+偏移量
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旧版返回格式(/captcha、/captcha/base64):
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{
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"box": [x1, y1, x2, y2], // 缺口坐标
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"confidence": 0.95, // 置信度
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"message": null // 错误信息
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}
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新版返回格式(/captcha/v2、/captcha/v2/base64):
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{
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"slider": [x1, y1, x2, y2], // 滑块坐标(空列表=未检测到)
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"slider_confidence": 0.92, // 滑块置信度
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"gap": [x1, y1, x2, y2], // 缺口坐标(空列表=未检测到)
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"gap_confidence": 0.88, // 缺口置信度
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"offset": 162, // 滑动距离 = 缺口x1 - 滑块x1
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"message": null // 错误信息
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}
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"""
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import gc # 垃圾回收,手动释放内存(HF免费层512MB)
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import os # 读取环境变量(端口号)
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from typing import List, Optional
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import cv2 # OpenCV,图片解码
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import numpy as np # 数组操作
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from captcha_recognizer.slider import Slider # 核心:滑块识别模型
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from fastapi import FastAPI, File, UploadFile # Web 框架
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from fastapi.middleware.cors import CORSMiddleware # 跨域支持
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from pydantic import BaseModel # 数据模型定义
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# ============================================================
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# FastAPI 应用初始化
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# ============================================================
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app = FastAPI(
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docs_url=None, # 关闭 /docs(Swagger UI),避免暴露接口文档
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redoc_url=None, # 关闭 /redoc,同上
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)
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# 允许跨域请求(任何域名都能调用这个 API)
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# 如果你只想允许特定域名调用,把 "*" 改成具体域名列表
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app.add_middleware(
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CORSMiddleware,
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allow_origins=["*"], # 允许的来源域名,* 表示全部
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allow_methods=["*"], # 允许的 HTTP 方法
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allow_headers=["*"], # 允许的请求头
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)
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# ============================================================
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# 模型加载(服务启动时只加载一次)
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# ============================================================
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# Slider() 会加载 slider.onnx 模型文件到内存
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# 放在全局意味着整个服务生命周期只加载一次,不用每次请求都读模型
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slider = Slider()
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# ============================================================
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# 健康检查接口
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# ============================================================
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@app.get("/")
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def hello_captcha():
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"""根路径,简单返回服务状态,可用于判断服务是否存活"""
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return {"Hello": "Captcha", "status": "running"}
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@app.get("/health")
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def health():
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"""健康检查接口,部署平台(如 HF Spaces)会定期调用"""
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return {"status": "ok"}
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# ============================================================
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# 返回数据模型
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# ============================================================
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class DetectionResult(BaseModel):
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"""旧版接口返回格式(只返回缺口,保持向后兼容)"""
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box: List[int] # 缺口坐标 [x1, y1, x2, y2]
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confidence: float # 置信度 0~1
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message: str = None # 错误信息,正常为 null
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class SliderGapResult(BaseModel):
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"""新版接口返回格式(同时返回滑块和缺口)"""
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slider: List[int] = [] # 滑块坐标 [x1, y1, x2, y2],空列表=未检测到
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slider_confidence: float = 0.0 # 滑块置信度
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gap: List[int] = [] # 缺口坐标 [x1, y1, x2, y2],空列表=未检测到
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gap_confidence: float = 0.0 # 缺口置信度
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offset: int = 0 # 滑动距离 = 缺口x1 - 滑块x1,0=无法计算
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message: Optional[str] = None # 错误信息
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# ============================================================
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# 内部公共方法:图片解码 + 识别
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# ============================================================
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def _decode_and_recognize(image_bytes: bytes) -> SliderGapResult:
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"""
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图片字节 → 识别结果(滑块+缺口)
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流程:字节 → OpenCV图片 → 模型推理 → 返回结构化结果
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所有接口共用这个方法,避免重复代码
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"""
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nparr = np.frombuffer(image_bytes, np.uint8)
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image = cv2.imdecode(nparr, cv2.IMREAD_COLOR)
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if image is None:
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return SliderGapResult(message="不支持的图片")
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# 调用模型,同时获取滑块和缺口
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result = slider.identify_both(source=image)
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# 手动释放内存(HF 免费层内存有限,防止 OOM)
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del image, nparr
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gc.collect()
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return SliderGapResult(
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slider=result['slider'],
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slider_confidence=result['slider_confidence'],
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gap=result['gap'],
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gap_confidence=result['gap_confidence'],
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offset=result['offset'],
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)
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# ============================================================
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# 旧版接口(保持向后兼容,只返回缺口)
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# ============================================================
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@app.post("/captcha", response_model=DetectionResult)
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async def captcha(file: UploadFile = File(...)):
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"""
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旧版:上传图片文件识别,只返回缺口
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用法:POST /captcha,body 里传图片文件(form-data)
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"""
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contents = await file.read()
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result = _decode_and_recognize(contents)
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if result.message:
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return DetectionResult(box=[], confidence=0, message=result.message)
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return DetectionResult(box=result.gap, confidence=result.gap_confidence)
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@app.post("/captcha/base64", response_model=DetectionResult)
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async def captcha_base64(data: dict):
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"""
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旧版:上传 base64 图片识别,只返回缺口
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用法:POST /captcha/base64,JSON body: {"image": "base64字符串"}
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"""
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import base64
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image_b64 = data.get("image", "")
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if not image_b64:
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return DetectionResult(box=[], confidence=0, message="缺少image参数")
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# 去掉 base64 头(如果有),如 "data:image/png;base64,"
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if "," in image_b64:
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image_b64 = image_b64.split(",")[1]
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try:
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image_bytes = base64.b64decode(image_b64)
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except Exception as e:
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return DetectionResult(box=[], confidence=0, message=f"base64解码失败: {str(e)}")
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result = _decode_and_recognize(image_bytes)
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if result.message:
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return DetectionResult(box=[], confidence=0, message=result.message)
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return DetectionResult(box=result.gap, confidence=result.gap_confidence)
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# ============================================================
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# 新版接口(返回滑块 + 缺口 + 偏移量)
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# ============================================================
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@app.post("/captcha/v2", response_model=SliderGapResult)
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async def captcha_v2(file: UploadFile = File(...)):
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"""
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新版:上传图片文件识别,返回滑块+缺口+偏移量
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用法:POST /captcha/v2,body 里传图片文件(form-data)
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返回示例:
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{
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"slider": [23, 78, 62, 117],
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"slider_confidence": 0.92,
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"gap": [185, 76, 224, 115],
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"gap_confidence": 0.88,
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"offset": 162,
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"message": null
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}
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"""
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contents = await file.read()
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return _decode_and_recognize(contents)
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@app.post("/captcha/v2/base64", response_model=SliderGapResult)
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async def captcha_v2_base64(data: dict):
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"""
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新版:上传 base64 图片识别,返回滑块+缺口+偏移量
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请求格式:{"image": "base64字符串"}
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适合懒人精灵等脚本通过 HTTP POST 调用
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base64 字符串支持两种格式:
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- 带 data:image 前缀的:data:image/png;base64,iVBORw0KGgo...
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- 纯 base64:iVBORw0KGgo...
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"""
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import base64
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+
|
| 224 |
+
image_b64 = data.get("image", "")
|
| 225 |
+
if not image_b64:
|
| 226 |
+
return SliderGapResult(message="缺少image参数")
|
| 227 |
|
| 228 |
+
if "," in image_b64:
|
| 229 |
+
image_b64 = image_b64.split(",")[1]
|
| 230 |
|
| 231 |
+
try:
|
| 232 |
+
image_bytes = base64.b64decode(image_b64)
|
| 233 |
+
except Exception as e:
|
| 234 |
+
return SliderGapResult(message=f"base64解码失败: {str(e)}")
|
| 235 |
|
| 236 |
+
return _decode_and_recognize(image_bytes)
|
| 237 |
|
| 238 |
|
| 239 |
+
# ============================================================
|
| 240 |
+
# 启动入口
|
| 241 |
+
# ============================================================
|
| 242 |
if __name__ == "__main__":
|
| 243 |
import uvicorn
|
| 244 |
+
# HF Spaces 要求从环境变量读端口号,默认 7860
|
| 245 |
+
# 本地开发时直接 python main.py 即可启动
|
| 246 |
port = int(os.environ.get("PORT", 7860))
|
| 247 |
uvicorn.run(app, host="0.0.0.0", port=port)
|