针对你的问题“flask no 'access-control-allow-origin' header is present on the requested resource”,这里为你详细解释并提供解决方案。 1. 理解问题 这个问题通常出现在使用Flask框架开发的Web应用中,当客户端(如浏览器中的JavaScript代码)尝试从不同于服务器源(域名、协议或端口)的地址发起请求时,浏览器会因为...
No 'Access-Control-Allow-Origin' header is present on the requested resource. 找到后端文件/app/init.py,利用flask_cors中的CORS即可解决。 fromflask_corsimportCORSapp = Flask(__name__)CORS(app) __EOF__
supports_credentials 布尔值 Access-Control-Allow-Credentials 是否允许请求发送cookie,false是不允许 max_age 整数、字符串 Access-Control-Max-Age 预检请求的有效时长 2、在被请求的Response header中加入header from flask import Flask def after_request(response): response.headers['Access-Control-Allow-Origin'...
浏览器Console界面可以看到页面报错信息如下: has been blocked by CORS policy: Response to preflight request doesn’t pass access control check: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. 二、原因分析 起初以为是程序代码问题,排查了半天,结果方向错了。后来才定位到,...
17 Vue 使用 vue-resource 发起get、post、jsonp请求.html:1 Access to XMLHttpRequest at 'http://127.0.0.1:5000/login' from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. ...
No 'Access-Control-Allow-Origin' header is present on the requested 3、解决方式: (1)安装flask_cors: pip install flask_cors 1. app初始化的时候就加载配置,如下 from flask import Flask from flask_cors import CORS app = Flask(__name__) ...
17 Vue 使用 vue-resource 发起get、post、jsonp请求.html:1 Access to XMLHttpRequest at 'http://127.0.0.1:5000/login' from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. ...
Flask 跨域设置 返回码大于400是报错The 'Access-Control-Allow-Origin' header contains multiple values...
location /api { proxy_pass http://localhost:5000; # 将请求转发给Flask应用 add_header 'Access-Control-Allow-Origin' '*' always; # 允许所有域名访问 add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE' always; # 允许的HTTP方法 add_header 'Access-Control-Allow-Headers' 'Conte...
Console says: No 'Access-Control-Allow-Origin' header is present on the requested resource. List of installed Flask modules: When I run the app locally everything works. My request looks like this: vardata=$resource('http://127.0.0.1:5000/').get(); ...