Admin SDK for Python 3.0.0 迁移指南

适用于 Python 的 Firebase Admin SDK 3.0.0 版在 API 中引入了一些重要更改。此版本中的 API 更改主要是对 Auth、FCM 和其他 Firebase 功能的错误处理进行了添加和改进。

一般错误处理更改

已删除以下异常类型：

• auth.AuthError
• db.ApiCallError
• instance_id.ApiCallError
• messaging.ApiCallError
• project_management.ApiCallError

取而代之的是，一个新的firebase_admin.exceptions模块已经出台。在公共API auth ， db ， instance_id ， messaging和project_management模块现在提高的情况下exceptions.FirebaseError类型。

# Before
from firebase_admin import messaging

try:
    messaging.send(build_message())
except messaging.ApiCallError as ex:
    print('Error message:', ex)

# v3
from firebase_admin import exceptions
from firebase_admin import messaging

try:
    messaging.send(build_message())
except exceptions.FirebaseError as ex:
    print('Error message:', ex)
    print('Error code:', ex.code) # Platform-wide error code
    print('HTTP response:', ex.http_response) # requests HTTP response object

该exceptions.FirebaseError类型有多种亚型。 Admin SDK 中的公共 API 只能引发这些子类型。因此，您可以编写捕获特定子类型并更精细地处理错误的代码。例如：

try:
    messaging.send(build_message())
except exceptions.InvalidArgumentError as ex:
    print(ex) # One or more arguments were invalid
except exceptions.UnavailableError as ex:
    print(ex) # FCM service is temporarily down
except exceptions.FirebaseError as ex:
    print(ex) # All other errors

相反，捕捉特定的错误类型的，也可能搭上父母FirebaseError类型和比较的错误代码。

try:
    messaging.send(build_message())
except exceptions.FirebaseError as ex:
    if ex.code == exceptions.INVALID_ARGUMENT:
        print(ex) # One or more arguments were invalid
    elif ex.code == exceptions.UNAVAILABLE:
        print(ex) # FCM service is temporarily down
    else:
        print(ex) # All other errors

每个模块可以声明从延伸附加亚型exceptions.FirebaseError父类型（见下面）。

错误处理的一般原则：抓住exceptions.FirebaseError当你不需要的错误情况进行区分。当您需要区分错误条件时，寻找更具体的错误子类或错误代码。

身份验证错误处理更改

智威汤逊验证

该auth.verify_id_token()方法不再引发ValueError ，表示令牌验证错误。相反，您将收到以下错误类型之一：

• InvalidIdTokenError
• ExpiredIdTokenError
• RevokedIdTokenError

所述InvalidIdTokenError型延伸exceptions.InvalidArgumentError类型，这又延长了exceptions.FirebaseError类型。 ExpiredIdTokenError和RevokedIdTokenError延长InvalidIdTokenError 。

# Before
from firebase_admin import auth

try:
    auth.verify_id_token(id_token, check_revoked=True)
except ValueError as ex:
    print('Error message:', ex)

 # v3
from firebase_admin import auth

# Coarse-grained error handling
try:
    auth.verify_id_token(id_token, check_revoked=True)
except auth.InvalidIdTokenError as ex:
    print('ID token is invalid, expired or revoked')

# Fine-grained error handling
try:
    auth.verify_id_token(id_token, check_revoked=True)
except auth.RevokedIdTokenError as ex:
    print('ID token has been revoked')
except auth.ExpiredIdTokenError as ex:
    print('ID token is expired')
except auth.InvalidIdTokenError as ex:
    print('ID token is invalid')

类似地， auth.verify_session_cookie()方法引发以下的异常类型：

• InvalidSessionCookieError
• ExpiredSessionCookieError
• RevokedSessionCookieError

类层次结构和语义类似于verify_id_token() API。

自定义令牌

该create_custom_token() API引发auth.TokenSignError而不是ValueError ，表示故障。

# Before
from firebase_admin import auth

try:
    auth.create_custom_token(uid)
except ValueError as ex:
    print('Error message:', ex)

 # v3
from firebase_admin import auth

try:
    auth.create_custom_token(uid)
except auth.TokenSignError as ex:
    print('Error message:', ex)

用户管理

以下新的错误类型已经被引入到auth模块：

• EmailAlreadyExistsError
• InvalidDynamicLinkDomainError
• PhoneNumberAlreadyExistsError
• UidAlreadyExistsError
• UnexpectedResponseError
• UserNotFoundError

# Before
from firebase_admin import auth

try:
    auth.get_user(uid)
except auth.AuthError as ex:
    if ex.code == auth.USER_NOT_FOUND_ERROR:
        print('Specified user does not exist')
    else:
        print('Something else went wrong')

 # v3
from firebase_admin import auth
from firebase_admin import exceptions

try:
    auth.get_user(uid)
except auth.UserNotFoundError as ex:
    print('Specified user does not exist')
except exceptions.FirebaseError as ex:
    print('Something else went wrong')

FCM 错误处理更改

以下新的错误类型已经被引入到messaging模块。

• QuotaExceededError
• SenderIdMismatchError
• ThirdPartyAuthError
• UnregisteredError

# Before
from firebase_admin import messaging

try:
    messaging.send(msg)
except messaging.ApiCallError as ex:
    if ex.code == 'registration-token-not-registered':
        print('Registration token has been unregistered')
    elif ex.code == 'invalid-argument':
        print('One or more arguments invalid')
    else:
        print('Something else went wrong')

# v3
from firebase_admin import exceptions
from firebase_admin import messaging

try:
    messaging.send(msg)
except messaging.UnregisteredError as ex:
    print('Registration token has been unregistered')
except exceptions.InvalidArgumentError as ex:
    print('One or more arguments invalid')
except exceptions.FirebaseError as ex:
    print('Something else went wrong')

用户属性删除

它不再是可以删除的属性display_name ， photo_url ， phone_number和custom_claims将它们设置为None 。这些设置为None叶这些属性不变。它们必须明确设置为auth.DELETE_ATTRIBUTE删除它们。

# Before
from firebase_admin import auth

auth.update_user(uid, display_name=None, photo_url=None)

 # v3
from firebase_admin import auth

auth.update_user(
  uid, display_name=auth.DELETE_ATTRIBUTE, photo_url=auth.DELETE_ATTRIBUTE)