python flask 使用flask-cors 解决跨域问题

2018-02-11 14:08:59来源:oschina作者:阿豪boy人点击



Install the extension with using pip, or easy_install.

$ pip install -U flask-cors

This package exposes a Flask extension which by default enables CORS support on all routes, for all origins and methods. It allows parameterization of all CORS headers on a per-resource level. The package also contains a decorator, for those who prefer this approach.

Simple Usage

In the simplest case, initialize the Flask-Cors extension with default arguments in order to allow CORS for all domains on all routes. See the full list of options in thedocumentation.

from flask import Flask
from flask_cors import CORS
app = Flask(__name__)
def helloWorld():
return "Hello, cross-origin-world!"
Resource specific CORS

Alternatively, you can specify CORS options on a resource and origin level of granularity by passing a dictionary as theresourcesoption, mapping paths to a set of options. See the full list of options in thedocumentation.

app = Flask(__name__)
cors = CORS(app, resources={r"/api/*": {"origins": "*"}})
def list_users():
return "user example"
Route specific CORS via decorator

This extension also exposes a simple decorator to decorate flask routes with. Simply add@cross_origin()below a call to Flask’s@app.route(..)to allow CORS on a given route. See the full list of options in thedecorator documentation.

def helloWorld():
return "Hello, cross-origin-world!"