https://stackoverflow.com › questions › 42589882
NodeJS - CORS middleware `origin` undefined - Stack OverflowIf you do not want to block REST tools or server-to-server requests, add a !origin check in the origin function like so: var corsOptions = { origin: function (origin, callback) { if (!origin || whitelist.indexOf(origin) !== -1) { callback(null, true) } else { callback(new Error('Not allowed by CORS')) } } }
https://stackoverflow.com › questions › 61378602
CORS origin undefined with simple nodejs server - Stack OverflowI am running this server on localhost, but the origin in the cors callback is always 'undefined'. For example when I open http://localhost:5000 on the browser or do a curl call. How can I use cors so that it doesn't block the request on localhost?
https://dev.to › mc-stephen › how-to-fix-cors-origin-error-in-javascript-3nd3
How to Fix CORS Origin Error in Javascript - DEV CommunityYou can successfully bypass the CORS origin error locally by installing an extension on your local browser called the Moesif CORS extension. Installing the Moesif CORS extension is the quickest solution.
https://spacejelly.dev › posts › how-to-fix-cors-errors-allow-cross-origin-api-requests
How to Fix CORS Errors & Allow Cross-Origin API RequestsBy default, not providing any headers would prevent any origin other than the server itself from making a request, which is good from a security perspective. But luckily it’s easy to configure whether you’re building a public API or want to allow requests from a different environment.
https://github.com › expressjs › cors › issues › 295
Incorrect response when option origin is true and ... - GitHubThe origin function will receive undefined as request origin, so even if the returned value is true (i.e. accept the request), the resposne will be handled like this : cors/lib/index.js Lines 58 to 67 in f038e77
https://github.com › expressjs › cors › issues › 296
"origin" is undefined when requests are received from the same server ...I want to allow requests only to be made to my server from the same domain. It's been indicated that "origin" is undefined when this is the case, and so you should approve requests in this case.
https://github.com › expressjs › cors › issues › 262
Solution to issue 71 "undefined headers.origin" #262 - GitHubreq.headers.origin = req.headers.origin || req.headers.host; However, I realised that referer always includes a full host link. Here is my solution that eventually replaces origin with another link scrambled from refefer.
https://developer.mozilla.org › fr › docs › Web › HTTP › Headers › Origin
Origin - HTTP | MDN - MDN Web DocsL'en-tête Origin peut valoir null dans certains cas (la liste qui suit n'est pas exhaustive) : Le schéma de l'origine n'est pas http, https, ftp, ws, wss, ou gopher (y compris blob, file et data). La requête porte sur des médias d'origines multiples, par exemple via les éléments <img>, <video> et <audio>.
https://www.slingacademy.com › article › fixing-nodejs-express-error-cross-origin-requests
Fixing Node.js & Express Error for Cross Origin RequestsWhen you encounter a Cross-Origin Resource Sharing (CORS) error in Node.js with Express, it’s typically due to the same-origin policy enforced by web browsers for security reasons. This policy prevents a web page from making requests to a different domain than the one that served the web page.
https://dev.to › hiroyone › how-to-troubleshoot-cors-preflight-options-errors-in-2022-5ek9
How to troubleshoot CORS Preflight / Options errors in 2022It matters when a currently viewed website is trying to fetch a resource like JSON from another web server (cross-origin) because browsers restrict cross-origin HTTP requests initiated from scripts.
