cors VS flutter

// https://www.npmjs.com/package/nextjs-cors import NextCors from 'nextjs-cors'; async function handler(req, res) { // Run the cors middleware // nextjs-cors uses the cors package, so we invite you to check the documentation https://github.com/expressjs/cors await NextCors(req, res, { // Options methods: ['GET', 'HEAD', 'PUT', 'PATCH', 'POST', 'DELETE'], origin: '*', optionsSuccessStatus: 200, // some legacy browsers (IE11, various SmartTVs) choke on 204 }); // Rest of the API logic res.json({ message: 'Hello NextJs Cors!' }); }

import axios from "axios"; import Cors from "cors"; import initMiddleware from "../../lib/init-middleware"; // Initialize the cors middleware const cors = initMiddleware( // You can read more about the available options here: https://github.com/expressjs/cors#configuration-options Cors({ // Only allow requests with GET, POST and OPTIONS methods: ['GET', 'POST', 'OPTIONS'], }) ); export default async function myBooksHandler(req, res) { await cors(req, res); const address = req.query.address; const chain = "polygon"; const options = { method: 'GET', url: 'https://api.nftport.xyz/v0/accounts/creators/0x1xxxxxxxxxxxxx5b', params: {chain: 'polygon', include: 'metadata'}, headers: { 'Content-Type': 'application/json', Authorization: 'xxxxxxxxx' } }; try { const result = await axios.request(options) res.status(200).json({ result: result.data }) } catch (err) { res.status(500).json({ error: 'failed to load data' }) } };

CORS: Cross-Origin Resource-Sharing enabled using cors

import Cors from "cors"; function initMiddleware(middleware) { return (req, res) => new Promise((resolve, reject) => { middleware(req, res, (result) => { if (result instanceof Error) { return reject(result); } return resolve(result); }); }); } const cors = initMiddleware( // You can read more about the available options here: https://github.com/expressjs/cors#configuration-options Cors({ // Only allow requests with GET, POST and OPTIONS methods: ["GET"], }) ); export default async function handler(req, res) { // Run cors await cors(req, res); // Rest of the API logic res.json({ message: "Hello Everyone!" }); }

My Nodejs restful service has the following endpoint http://localhost:3000/api/countries. I am using this middleware https://github.com/expressjs/cors. I have cors enabled thus:-

You could also add cors like this and then configure it to only allow requests from your site.

Check out https://github.com/expressjs/cors#configuration-options

The library you're going to use to help fix the CORS errors you've been battling is the cors middleware package. Head to the directory containing your Express application in your terminal, and let's get it installed:

You can add the cors middleware package to your application to help you send the correct CORS response headers from your API endpoints. By default, the headers it sends will allow any web page to make requests to your API, so make sure you check out the configuration options, and at the very least set the origin option so that you are restricting which web pages are able to call your API (unless you’re running an API for public use, in which case this won’t be an issue).

If you're interested in learning more, visit http://flutter.io for more information!

I wanted to be able to use my final product on iOS, macOS, Android, and Windows, but I did not want to have to maintain four separate native codebases. Flutter seemed to be a good option, but I'm not well-versed in Dart, and Flutter's supposed performance advantages over web apps are overblown according to my local tests. Therefore, I opted to use a Progressive Web App (PWA) architecture for my document scanner.

Flutter is Google's UI toolkit for building beautiful, natively compiled applications for mobile, web, desktop, and embedded devices from a single codebase.. The main goal of this repository is to find free open source apps and start contributing to it. Feel free to contribute to the list, any suggestions are always welcomed!

Cool find! From the docs: /// It's intended to be used by packages that need to share a modest /// number of values among their own components. /// /// SharedAppData is not intended to be a substitute for Provider or any of /// the other general purpose application state systems. SharedAppData is /// for situations where a package's custom widgets need to share one /// or a handful of immutable data objects that can be lazily /// initialized. It exists so that packages like that can deliver /// custom widgets without requiring the developer to add a /// package-specific umbrella widget to their application. https://github.com/HansMuller/flutter/blob/52db14b48d42f3d95e94c691a10238716370d8e9/packages/flutter/lib/src/widgets/shared_app_data.dart