cors

[Solved] XMLHttpRequest cannot load file:///C:/Users/hamma/Desktop/rao.html

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According to your console output: XMLHttpRequest cannot load file:///C:/Users/hamma/Desktop/rao.html. Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https, chrome-extension-resource. That means that you are trying to run the file without a server i.e. file:///[…] and for security reasons you can’t run AJAX requests like that. You need to setup a … Read more

[Solved] CORS preflight return Access-Control-Allow-Origin but response hangs on

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Both the preflight and actual response must grant permission with Access-Control-Allow-Origin. If only the prelight does, then the order of events is: JavaScript asks to make request Browser makes preflight request Server sends preflight response Browser checks CORS (passes) Browser makes actual request Server sends actual response Browser checks CORS (fails) Browser denies permission to … Read more

[Solved] Access-Control-Allow-Origin not working with ionic 5 app [closed]

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I found the problem and the fix. As expected it was in the Ionic App’s code. But it was not quite what I expected. Hopefully, this may be useful to someone in the same predicament. The problem was this line: base_path=”http://mywebsite.com/App”; This was supposed to be: base_path=”http://mywebsite.com/App/”; Subtle difference but important. After looking carefully at … Read more

[Solved] Using fetch with Passport gets “No ‘Access-Control-Allow-Origin’ header is present on the requested resource.”

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OK this is an open issue with Passport: https://github.com/jaredhanson/passport/issues/582#issuecomment-506283986 I should use the href and not fetch. Possible duplicate of Cors error when sending request from React frontend to Google Oauth PassportJS on backend solved Using fetch with Passport gets “No ‘Access-Control-Allow-Origin’ header is present on the requested resource.”