增加一种通用的验证字段的方式

cloud-java · cloud-java · commit bf87b560c253 · 2023-12-04T13:57:22.000+08:00
diff --git a/run.py b/run.py
@@ -55,28 +55,27 @@
 async def request_validation_exception_handler2(request: Request, exc: tutorial.chapter03.ValDtoError):
     print(f"===>参数校验异常{request.method} {request.url}")
     return JSONResponse({"message":exc.message})
-# @app.exception_handler(RequestValidationError)  # 重写请求验证异常处理器
-# async def validation_exception_handler(request, exc):
-#
-#     """
-#     :param request: 这个参数不能省
-#     :param exc:
-#     :return:
-#     """
-#     print("222"*10)
-#     # 自定义错误输出信息
-#     errors = []
-#     for error in exc.errors():
-#         print(error)
-#         print(type(error))
-#         errors.append({
-#             "loc": error["loc"],
-#             "msg": error["msg"],
-#             "type": error["type"]
-#         })
-#     # raise HTTPException(status_code=422, detail=errors)
-#
-#     return PlainTextResponse(str(errors), status_code=400)
+@app.exception_handler(RequestValidationError)  # 重写请求验证异常处理器
+async def validation_exception_handler(request, exc):
+
+    """
+    :param request: 这个参数不能省
+    :param exc:
+    :return:
+    """
+    errors = []
+    for error in exc.errors():
+        print(error)
+        print(type(error))
+        errors.append({
+            "loc": error["loc"],
+            "msg": error["msg"],
+            "type": error["type"]
+        })
+    # raise HTTPException(status_code=422, detail=errors)
+    return JSONResponse({"code":402,"msg":errors[0]['msg'],"errors":errors})
+
+    # return PlainTextResponse(str(errors), status_code=400)
 
 
 # @app.middleware('http')
diff --git a/test-jwt.py b/test-jwt.py
@@ -0,0 +1,205 @@
+from datetime import timedelta, datetime
+from typing import Union
+
+import uvicorn
+from fastapi import FastAPI, Depends, HTTPException
+from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
+from jose import jwt, JWTError
+from passlib.context import CryptContext
+from pydantic import BaseModel
+from starlette import status
+
+# openssl rand -hex 32
+# 使用命令行生成jwt的随机密钥
+SECRET_KEY = "25a7a7c926bdc1a840daced5aeaa0f8ed1abebaa975a49522752aa16c4a63fc9"
+ALGORITHM = "HS256"  # 算法
+ACCESS_TOKEN_EXPIRE_MINUTES = 20  # token过期时间
+
+# 这是数据库中的用户列表
+fake_users_db = {
+    "johndoe": {
+        "username": "johndoe",
+        "full_name": "John Doe",
+        "email": "johndoe@example.com",
+        "hashed_password": "$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW",
+        "disabled": False,
+    }
+}
+
+
+class Token(BaseModel):
+    """
+    token返回对象
+    """
+    access_token: str
+    token_type: str
+
+
+class TokenData(BaseModel):
+    username: Union[str, None] = None
+
+
+class User(BaseModel):
+    username: str
+    email: Union[str, None] = None
+    full_name: Union[str, None] = None
+    disabled: Union[bool, None] = None
+
+
+# 继承了User类，存储与数据库的user
+class UserInDB(User):
+    hashed_password: str
+
+
+# 这是一个实例对象
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+# 这是一个实例对象
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/token")
+
+app = FastAPI()
+
+
+def verify_password(plain_password, hashed_password) -> bool:
+    """
+    校验密码是否正确
+    :param plain_password: 密码明文
+    :param hashed_password: 加密后的密码
+    :return: 校验结果
+    """
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password) -> str:
+    """
+    获取密码的hash值
+    :param password: 密码明文
+    :return: 密码hash值
+    """
+    return pwd_context.hash(password)
+
+
+def get_user(db: dict, username: str):
+    """
+    从数据库中获取用户
+    :param db: 数据库,此处假设为字典
+    :param username:  用户名
+    :return: 用户信息
+    """
+    if username in db:
+        user_dict = db[username]
+        return UserInDB(**user_dict)
+
+
+def authenticate_user(fake_db: dict, username: str, password: str):
+    """
+    验证用户身份
+    :param fake_db:
+    :param username:
+    :param password:
+    :return:
+    """
+    # 从数据库获取数据库中的用户对象
+    user = get_user(fake_db, username)
+    if not user:
+        # 如果数据库中没有这个用户，返回false
+        return False
+    if not verify_password(password, user.hashed_password):
+        # 如果数据库中有这个用户，但是密码校验不通过，返回false
+        return False
+    return user
+
+
+def create_access_token(data: dict, expires_delta: Union[timedelta, None] = None):
+    """
+    生成token
+    :param data: 用户信息
+    :param expires_delta: 过期时间
+    :return: 利用用户信息生成的token
+    """
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(minutes=15)
+    to_encode.update({"exp": expire})
+    encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
+    return encoded_jwt
+
+
+async def get_current_user(token: str = Depends(oauth2_scheme)):
+    """
+    获取当前用户
+    :param token:
+    :return:
+    """
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    try:
+        # 利用jwt解析请求头中的token值，获取实际的用户信息
+        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
+        username: str = payload.get('sub')
+        if username is None:
+            raise credentials_exception
+        token_data = TokenData(username=username)
+    except JWTError:
+        raise credentials_exception
+    user = get_user(fake_users_db, username=token_data.username)
+    if user is None:
+        raise credentials_exception
+    return user
+
+
+async def get_current_active_user(current_user: User = Depends(get_current_user)):
+    """
+    获取当前用户
+    :param current_user: 当前用户
+    :return:
+    """
+    if current_user.disabled:
+        raise HTTPException(status_code=400, detail="Inactive user")
+    return current_user
+
+
+@app.post("/token", response_model=Token)
+async def login_for_access_token(form_data: OAuth2PasswordRequestForm = Depends()):
+    user = authenticate_user(fake_users_db, form_data.username, form_data.password)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect username or password",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    access_token_expires = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
+    access_token = create_access_token(
+        data={"sub": user.username},
+        expires_delta=access_token_expires
+    )
+    return {"access_token": access_token, "token_type": "bearer"}
+
+
+@app.get("/users/me/", response_model=User)
+async def read_users_me(current_user: User = Depends(get_current_active_user)):
+    """
+    获取当前用户
+    :param current_user:
+    :return:
+    """
+    return current_user
+
+
+@app.get("/users/me/items/")
+async def read_own_items(current_user: User = Depends(get_current_active_user)):
+    """
+    获取当前用户拥有的物品
+    :param current_user:
+    :return:
+    """
+    return [{"item_id": "Foo", "owner": current_user.username}]
+
+
+if __name__ == '__main__':
+    uvicorn.run('test-jwt:app', host='0.0.0.0', port=8000, reload=True, debug=True, workers=1)
diff --git a/test.py b/test.py
@@ -0,0 +1,3 @@
+c = 16.6
+price = 0.6
+print(price * c / 100)
diff --git a/tutorial/chapter03.py b/tutorial/chapter03.py
@@ -7,7 +7,7 @@
 from typing import Optional, List, Annotated
 
 from fastapi import APIRouter, Query, Path, Body, Cookie, Header
-from pydantic import BaseModel, Field, BeforeValidator
+from pydantic import BaseModel, Field, BeforeValidator, field_validator
 
 app03 = APIRouter()
 
@@ -100,6 +100,16 @@ class CityInfo(BaseModel):
 
     currPage: Annotated[int, BeforeValidator(curr_page_v)]
 
+    @field_validator('name')
+    def name_validator(cls, v):
+        assert v.startswith('a'), "name必须以a开头"
+        return v
+
+    @field_validator('country')
+    def country(cls, v):
+        if ' ' not in v:
+            raise ValueError('country必须包含空格')
+        return v
     class Config:
         schema_extra = {
             "example": {

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+c = 16.6`
	`2`	`+price = 0.6`
	`3`	`+print(price * c / 100)`