Here is what worked for me when I deployed to Heroku. http://flask-cors.readthedocs.org/en/latest/ Install flask-cors by running – pip install -U flask-cors from flask import Flask from flask_cors import CORS, cross_origin app = Flask(__name__) cors = CORS(app) app.config[‘CORS_HEADERS’] = ‘Content-Type’ @app.route(“https://stackoverflow.com/”) @cross_origin() def helloWorld(): return “Hello, cross-origin-world!”
This happens generally when you try access another domain’s resources. This is a security feature for avoiding everyone freely accessing any resources of that domain (which can be accessed for example to have an exact same copy of your website on a pirate domain). The header of the response, even if it’s 200OK do not … Read more
Unless google serves this image with the correct Access-Control-Allow-Origin header, then you wont be able to use their image in canvas. This is due to not having CORS approval. You can read more about this here, but it essentially means: Although you can use images without CORS approval in your canvas, doing so taints the … Read more
This is a server side issue. You don’t need to add any headers in angular for cors. You need to add header on the server side: Access-Control-Allow-Headers: Content-Type Access-Control-Allow-Methods: GET, POST, OPTIONS Access-Control-Allow-Origin: * First two answers here: How to enable CORS in AngularJs
Update September 10, 2014: You shouldn’t need to do any of the query string hacks below anymore since Cloudfront properly supports CORS now. See http://aws.amazon.com/blogs/aws/enhanced-cloudfront-customization/ and this answer for more info: https://stackoverflow.com/a/25305915/308315 OK, I finally got the fonts working using the config below with a little tweak from examples in the documentation. My fonts are … Read more
In fact, there is nothing to do in Angular2 regarding cross domain requests. CORS is something natively supported by browsers. This link could help you to understand how it works: http://restlet.com/blog/2015/12/15/understanding-and-using-cors/ http://restlet.com/blog/2016/09/27/how-to-fix-cors-problems/ To be short, in the case of cross domain request, the browser automatically adds an Origin header in the request. There are two … Read more
Since they are running on different ports, they are different JavaScript origin. It doesn’t matter that they are on the same machine/hostname. You need to enable CORS on the server (localhost:8080). Check out this site: http://enable-cors.org/ All you need to do is add an HTTP header to the server: Access-Control-Allow-Origin: http://localhost:3000 Or, for simplicity: Access-Control-Allow-Origin: … Read more
You need to configure the server to not require authorization for OPTIONS requests (that is, the server the request is being sent to — not the one serving your frontend code). That’s because what’s happening is this: Your code tells your browser it wants to send a request with the Authorization header. Your browser says, … Read more
You can’t do a XMLHttpRequest crossdomain, the only “option” would be a technique called JSONP, which comes down to this: To start request: Add a new <script> tag with the remote url, and then make sure that remote url returns a valid javascript file that calls your callback function. Some services support this (and let … Read more
Since Spring Security 4.1, this is the proper way to make Spring Security support CORS (also needed in Spring Boot 1.4/1.5): @Configuration public class WebConfig extends WebMvcConfigurerAdapter { @Override public void addCorsMappings(CorsRegistry registry) { registry.addMapping(“/**”) .allowedMethods(“HEAD”, “GET”, “PUT”, “POST”, “DELETE”, “PATCH”); } } and: @Configuration public class SecurityConfig extends WebSecurityConfigurerAdapter { @Override protected void configure(HttpSecurity … Read more