在Chrome中调试Flutter程序，dio报错： The XMLHttpRequest onError callback was called
[flutter dio: The XMLHttpRequest onError callback was called]
解决：用'--disable-web-security'禁用CORS策略
1- Go to flutter\bin\cache and remove a file named: flutter_tools.stamp
2- Go to flutter\packages\flutter_tools\lib\src\web and open the file chrome.dart.
3- Find '--disable-extensions'
4- Add '--disable-web-security'
