cors

The ‘Access-Control-Allow-Origin’ header contains multiple values

We ran into this problem because we had set up CORS according to best practice (e.g. http://www.asp.net/web-api/overview/security/enabling-cross-origin-requests-in-web-api) AND ALSO had a custom header <add name=”Access-Control-Allow-Origin” value=”*”/> in web.config. Remove the web.config entry, and all is well. Contrary to @mww’s answer, we still have EnableCors() in the WebApiConfig.cs AND an EnableCorsAttribute on the controller. When we … Read more

API Gateway CORS: no ‘Access-Control-Allow-Origin’ header

I get the same problem. I have used 10hrs to findout. https://serverless.com/framework/docs/providers/aws/events/apigateway/ // handler.js ‘use strict’; module.exports.hello = function(event, context, callback) { const response = { statusCode: 200, headers: { “Access-Control-Allow-Origin” : “*”, // Required for CORS support to work “Access-Control-Allow-Credentials” : true // Required for cookies, authorization headers with HTTPS }, body: JSON.stringify({ “message”: … Read more

Allow anything through CORS Policy

I’ve your same requirements on a public API for which I used rails-api. I’ve also set header in a before filter. It looks like this: headers[‘Access-Control-Allow-Origin’] = ‘*’ headers[‘Access-Control-Allow-Methods’] = ‘POST, PUT, DELETE, GET, OPTIONS’ headers[‘Access-Control-Request-Method’] = ‘*’ headers[‘Access-Control-Allow-Headers’] = ‘Origin, X-Requested-With, Content-Type, Accept, Authorization’ It seems you missed the Access-Control-Request-Method header.

Is it safe to enable CORS to * for a public and readonly webservice?

Here’s something relevant from the Fetch spec (which defines CORS): Basic safe CORS protocol setup For resources where data is protected through IP authentication or a firewall (unfortunately relatively common still), using the CORS protocol is unsafe. (This is the reason why the CORS protocol had to be invented.) However, otherwise using the following header … Read more

CORS not working php

Finally, I myself have solved the problem explained in the question. The code that I have implemented for accessing header is incorrect. The below mentioned two line code, when given, didn’t work: <?php header(‘Access-Control-Allow-Origin: *’); header(‘Access-Control-Allow-Methods: POST, GET, OPTIONS’); ?> But handling CORS requests properly is a tad more involved. Here is a function that … Read more

Spring Boot Security CORS

Option 1 (Use WebMvcConfigurer bean): The CORS configuration that you started with is not the proper way to do it with Spring Boot. You need to register a WebMvcConfigurer bean. Reference here. Example Spring Boot CORS configuration: @Configuration @Profile(“dev”) public class DevConfig { @Bean public WebMvcConfigurer corsConfigurer() { return new WebMvcConfigurerAdapter() { @Override public void … Read more