cors

问题 I implemented a REST service, which I'm calling from a javascript application on a different domain. I'm attempting to do a GET request, and setting the Authorization: header, with a custom authentication scheme. Because I'm setting a custom header, Firefox will start with a preflight OPTIONS request. This request looks like this (simplified): OPTIONS /v1/articles HTTP/1.1 Host: example.org User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101206 Ubuntu/10.10

问题 I am writing an Angular 4 application that makes an authenticated connection to a Tomcat 7 server. The webapp on this Tomcat server has a REST API. I have a local copy of the server on one of my machines, so I am using a request url like this: http://xyz.local:8080/PoolParty/api/projects I am using Safari for the request and if I check the Disable Cross-Origin Restrictions menu item then I get a json package returned and I can display it in the browser. If I don't check that menu item then I

问题 This question already has answers here : XMLHttpRequest cannot load XXX No 'Access-Control-Allow-Origin' header (7 answers) Closed 3 years ago . There is something about Cross Origin Resource Sharing (CORS) that I have never truly understood, namely that with a cross-origin HTTP request, it is not the client that gets to decide which server(s) it wants to trust; instead, the server declares (in the Access-Control-Allow-Origin response header) that one or more particular clients (origins)

问题 Node Server var app = express(); app.use(function(req, res, next) { res.header('Access-Control-Allow-Credentials', true); res.header('Access-Control-Allow-Origin', req.headers.origin); res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE'); res.header('Access-Control-Allow-Headers', 'X-Requested-With, X-HTTP-Method-Override, Content-Type, Accept'); if ('OPTIONS' == req.method) { res.send(200); } else { next(); } }); React JS Fetch function request(url, options) { return fetch(url,

问题 Empty web.api project, install Microsoft.aspnet.webapi.cors 5.2.3, add config.EnableCors(); to webapiconfig. make controller and action public class HomeController : ApiController { [EnableCors("*" , "*" , "*")] public async Task<string> Get() { return await Task.FromResult("omg"); } } Debug app and Load up fiddler and do a request to http://localhost:61939/api/Home there are no CORS headers present. web.config contains: <system.webServer> <handlers> <remove name="ExtensionlessUrlHandler

问题 As I understand, a pre-flight request is sent by the browser if any of the following conditions is false (source: https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#Simple_requests): Request method is GET, HEAD or POST. Custom headers are not set. Content-Type header value is either application/x-www-form-urlencoded , multipart/form-data or text/plain . I have a web app which sends a GET request to a server on a different origin. Since I have to send cookies to the server, the property

问题 I am not able to access cross domain resources from my javascript file using XMLHttpRequest() . I understand that there are a few similar questions, I went through some of them but I have a bit of confusion regarding some of the details. I will mention my exact Setup and my specific doubts. Setup: I have my HTML and JS files on an apache server running on a ubuntu machine present in my local LAN network . The application is bascially hls plugin for video.js. From my windows PC in the same

问题 I'm not a backend developer, so I apologize ahead of time if I do not provide enough information. I am just trying to find some resources that will help my backend developer understand what I am trying to do. I am trying to make an AJAX GET request to an rss feed inside of web application that was built using ASP.NET Web Forms. However, the request gets blocked because of Cross Origin Security. I want to enable CORS for the route that is associated with our RSS feed ( /page/rss/{id} ). I was

问题 For reference I'm using Visual Studio 2017 and Windows 10. I have a web api and corresponding web application with user accounts. When I attempted to login I was met with an error which said No Access-Control-Allow-Origin header is present. I found a guide that walked me through how to setup CORS. This is the guide I used. https://social.technet.microsoft.com/wiki/contents/articles/33771.fix-to-no-access-control-allow-origin-header-is-present-or-working-with-cross-origin-request-in-asp-net

问题 For reference I'm using Visual Studio 2017 and Windows 10. I have a web api and corresponding web application with user accounts. When I attempted to login I was met with an error which said No Access-Control-Allow-Origin header is present. I found a guide that walked me through how to setup CORS. This is the guide I used. https://social.technet.microsoft.com/wiki/contents/articles/33771.fix-to-no-access-control-allow-origin-header-is-present-or-working-with-cross-origin-request-in-asp-net