Flask/Flask-CORS:缺少CORS标头"Access-Control-Allow-Origin" [英] Flask/Flask-CORS: CORS header ‘Access-Control-Allow-Origin’ missing

问题描述

我正在尝试链接一个 Flask后端具有 Vue.js前端的端口5000，端口8080在本地运行./p>

我能够成功注册和登录，但是无法在应用程序中提交文章，并且在浏览器控制台中出现以下错误.

跨域请求被阻止:同源策略禁止读取 http://localhost:5000上的远程资源/api/articles . (原因:CORS标头"Access-Control-Allow-Origin"缺失).

Flask后端使用Flask CORS(为每个蓝图初始化它们)，并且我已将localhost/127.0.0.1来源提供给白名单.

 #settings.py
    CORS_ORIGIN_WHITELIST = [
        'http://0.0.0.0:4100',
        'http://localhost:4100',
        'http://0.0.0.0:8000',
        'http://localhost:8000',
        'http://0.0.0.0:4200',
        'http://localhost:4200',
        'http://0.0.0.0:4000',
        'http://localhost:4000',
        'http://localhost:8080',
        'http://0.0.0.0:8080',
        'http://127.0.0.1:8080',
        'http://192.168.100.6:8080',
        'localhost'
    ]

 

 #app.py
def register_blueprints(app):
    """Register Flask blueprints."""
    origins = app.config.get('CORS_ORIGIN_WHITELIST', '*')
    cors.init_app(user.views.blueprint, origins=origins)
    cors.init_app(profile.views.blueprint, origins=origins)
    cors.init_app(articles.views.blueprint, origins=origins)

    app.register_blueprint(user.views.blueprint)
    app.register_blueprint(profile.views.blueprint)
    app.register_blueprint(articles.views.blueprint)

 

 #extensions.py

cors = CORS()

 

任何帮助将不胜感激.

解决方案

您是否尝试过将端口添加到localhost条目?

#settings.py
    CORS_ORIGIN_WHITELIST = [
        'http://0.0.0.0:4100',
        'http://localhost:4100',
        'http://0.0.0.0:8000',
        'http://localhost:8000',
        'http://0.0.0.0:4200',
        'http://localhost:4200',
        'http://0.0.0.0:4000',
        'http://localhost:4000',
        'http://localhost:8080',
        'http://0.0.0.0:8080',
        'http://127.0.0.1:8080',
        'http://192.168.100.6:8080',
        'localhost:8080'
    ]

I'm trying to link a Flask backend, running locally on port 5000 with a Vue.js frontend, running locally on port 8080.

I'm able to successfully signup and login, but fail to submit an article in the app, with the following error in the browser console.

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://localhost:5000/api/articles. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).

The Flask backend uses Flask CORS (initializes them for every blueprint) and I've provided the localhost/127.0.0.1 origins to the whitelist.

#settings.py
    CORS_ORIGIN_WHITELIST = [
        'http://0.0.0.0:4100',
        'http://localhost:4100',
        'http://0.0.0.0:8000',
        'http://localhost:8000',
        'http://0.0.0.0:4200',
        'http://localhost:4200',
        'http://0.0.0.0:4000',
        'http://localhost:4000',
        'http://localhost:8080',
        'http://0.0.0.0:8080',
        'http://127.0.0.1:8080',
        'http://192.168.100.6:8080',
        'localhost'
    ]

#app.py
def register_blueprints(app):
    """Register Flask blueprints."""
    origins = app.config.get('CORS_ORIGIN_WHITELIST', '*')
    cors.init_app(user.views.blueprint, origins=origins)
    cors.init_app(profile.views.blueprint, origins=origins)
    cors.init_app(articles.views.blueprint, origins=origins)

    app.register_blueprint(user.views.blueprint)
    app.register_blueprint(profile.views.blueprint)
    app.register_blueprint(articles.views.blueprint)

#extensions.py

cors = CORS()

Any help would be greatly appreciated.

解决方案

Have you tried adding the port to the localhost entry?

#settings.py
    CORS_ORIGIN_WHITELIST = [
        'http://0.0.0.0:4100',
        'http://localhost:4100',
        'http://0.0.0.0:8000',
        'http://localhost:8000',
        'http://0.0.0.0:4200',
        'http://localhost:4200',
        'http://0.0.0.0:4000',
        'http://localhost:4000',
        'http://localhost:8080',
        'http://0.0.0.0:8080',
        'http://127.0.0.1:8080',
        'http://192.168.100.6:8080',
        'localhost:8080'
    ]

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