If not, see Getting Started with ASP.NET Web API. This section assumes you already know how to create Web API projects. These URLs have different origins than the previous two: Two URLs have the same origin if they have identical schemes, hosts, and ports. Because the two applications are hosted at different domains, an AJAX request from WebClient to WebService is a cross-origin request. We'll start by creating two ASP.NET projects – one called "WebService", which hosts a Web API controller, and the other called "WebClient", which calls WebService. This tutorial demonstrates CORS support in ASP.NET Web API. This tutorial shows how to enable CORS in your Web API application. CORS is safer and more flexible than earlier techniques such as JSONP. Using CORS, a server can explicitly allow some cross-origin requests while rejecting others. However, sometimes you might want to let other sites call your web API.Ĭross Origin Resource Sharing (CORS) is a W3C standard that allows a server to relax the same-origin policy. This restriction is called the same-origin policy, and prevents a malicious site from reading sensitive data from another site.
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