flask-cors

问题 I'm a newbie in flask and angular please bear with me. I've been stuck with an issue about CORS. I've applied different code fixes just to make it work. Now the error that I am getting is Access to XMLHttpRequest at 'http://localhost:5000/dashboard/clientscount/2019/2020' from origin 'http://localhost:8080' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: It does not have HTTP ok status. I think the answer to my problem is from the answered

问题 I have a Vue frontend that uses Axios to POST to my Flask API. I've registered flask_cors to my Flask instance but I'm still get a CORS error. flask_cors registered in app/__init__.py from flask import Flask from flask_sqlalchemy import SQLAlchemy from flask_migrate import Migrate from config import Config from flask_marshmallow import Marshmallow from flask_cors import CORS app = Flask(__name__) app.config.from_object(Config) cors = CORS(app) db = SQLAlchemy(app) migrate = Migrate(app, db)

问题 I have a Vue frontend that uses Axios to POST to my Flask API. I've registered flask_cors to my Flask instance but I'm still get a CORS error. flask_cors registered in app/__init__.py from flask import Flask from flask_sqlalchemy import SQLAlchemy from flask_migrate import Migrate from config import Config from flask_marshmallow import Marshmallow from flask_cors import CORS app = Flask(__name__) app.config.from_object(Config) cors = CORS(app) db = SQLAlchemy(app) migrate = Migrate(app, db)

来源： https://stackoverflow.com/questions/45536658/access-control-allow-origin-missing-in-response-from-request-to-mailchimp-api-ur

来源： https://stackoverflow.com/questions/57762709/flask-flask-cors-cors-header-access-control-allow-origin-missing

来源： https://stackoverflow.com/questions/58091848/400-bad-request-error-with-flask-server-react-client-for-socketio

问题 I have a react microservice (via nginx) deployed onto google cloud run with its environment variable for the backend set to another google cloud run instance that's running gunicorn which is serving the backend. My Flask app is set up following everything I could find about allowing CORS: app = Flask(__name__) app.config.from_object(config) CORS(app, resources={r"/*": {"origins": "*"}}) app.config['CORS_HEADERS'] = 'Content-Type' return app # Different file, a blueprint's urls: @blueprint

问题 I'm running a Flask-Restful API locally and sending a POST request containing JSON from a different port. I'm getting the error No 'Access-Control-Allow-Origin' header is present on the requested resource. However, when I run curl --include -X OPTIONS http://localhost:5000/api/comments/3 --header Access-Control-Request-Method:POST --header Access-Control-Request-Headers:Content-Type --header Origin:http://localhost:8080 I get HTTP/1.0 200 OK Content-Type: text/html; charset=utf-8 Allow: HEAD,

问题 I am writing a Flask RESTful server and an AngularJS client, and am running into an issue where it appears the username and password information are being lost in transmission, so to speak. In the Javascript console, I can tell that the client is sending the the Authorization header as expected: Authorization: Basic username:password . However, within the @auth.verify_password callback, they are both both empty. I have a fair bit of unit tests around the server portion of the code, and the

问题 I'm following the flask-cors tutorial from the documentation here: https://pypi.python.org/pypi/Flask-Cors but when i installed it on my raspberry pi and run my python app i'm getting this error Traceback (most recent call last): File "app.py", line 3, in <module> from flask_cors import CORS, cross_origin ImportError: No module named 'flask_cors' here is my python script: from flask import Flask from Main import main from flask_cors import CORS, cross_origin app = Flask(__name__) CORS(app)