cors | 易学教程

Expressjs 解决AJAX跨域请求 (CORS)

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在我的前端项目http://localhost:63342/replay.moqi.mobi/index.html 中访问expressjs的项目http://localhost:3000/blogs会出现跨域请求的问题，如下： XMLHttpRequest cannot load http://localhost:3000/blogs. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:63342' is therefore not allowed access. 关于CORS，<pro express.js>书中38页介绍如下： If you’re building an application (a REST API server) that serves requests coming from front-end clients hosted on different domains, you might encounter cross-domain limitations when making XHR/AJAX calls. In other words, browser requests are limited

.net core allowing sending back error 401 when using CORS (instead of zero)

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问题 My client JS app is receiving status code 0 when it is actually 401. When I use postman for running the same request i am getting 401 as expected. I have enabled cors as the following: services.AddCors(o => o.AddPolicy("cors", builder => { builder.WithOrigins("http://localhost:4200") .AllowAnyMethod() .AllowAnyHeader() .AllowCredentials(); })); .... app.UseCors("cors"); The cors is working when there is no authentication problem (401). I am getting error code 0 in the client-side when it is

Basic GET request failed Angular and Spring

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问题 I am trying to make a simple request from angular to spring. I used bare bone spring web and spring security and simple angular(9) request. Let me share my Java and Angular code. Java Code @RestController @CrossOrigin(origins = "http://localhost:4200") public class Main { @RequestMapping("/hello") public Map<String,Object> home(){ Map<String, Object> model = new HashMap<String, Object>(); model.put("id", UUID.randomUUID().toString()); model.put("content", "Hello from Backend"); return model;

CORS issue with OneLogin using Custom-Allowed-Origin-Header-1

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问题 we are having an issue making an API call to generate an OAuth token. Our call looks like this: // Reusable variables var oneloginURL = "https://api.us.onelogin.com"; var oneloginSessionURL = "https://rxsense.onelogin.com"; // Axios objects for AJAX calls, For onelogin calls only var ONELOGIN_API = axios.create({baseURL: oneloginURL}) var ONELOGIN_SESSION_API = axios.create({baseURL: oneloginSessionURL}) const REQUIRED_CONFIG = { ONE_LOGIN: { LOGIN: { BASE: "https://api.us.onelogin.com",

WSO2 EI giving preflight request CORS error while requesting from Angular client

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问题 I am using angular client to call a rest api in wso2 which is exposed from a data service not directly built as an api and also tried many solutions provided in stack overflow and also wso2 documentation , nothing helps. 回答1: With regard to OPTIONS requests in the preflight, the WSO2 Enterprise Integrator (EI) behaves as follows depending on the implementation of the API. If we have defined OPTIONS as a resource method, then EI sends the request to the backend service to collect the

Socket.io and express app not connecting due to CORS error: “The value of the 'Access-Control-Allow-Origin' header must not be the wildcard '*'”

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问题 I'm slowly losing my mind over a very stupid issue I'm having. I have a socket.io/express app uploaded to Digital Ocean as a Docker setup. To allow https, I am using caddy as part of my Docker setup to allow for automatic https. I've been trying to connect to this setup via my domain and from my local React app that lives on localhost:3000. But I am constantly getting the following error: Access to XMLHttpRequest at 'https://mediaserver.domain.dev/socket.io/?EIO=3&transport=polling&t=N5BXNK2'

Allow Cross-Origin-Ressource Sharing R-Studio Server/Shiny

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问题 I am hosting a Shiny App on R-Studio Server. The App created through Shiny is a Browser App. That means JavaScript is executed from the Client site. In my App I create several through user interaction, which are saved on localhost/webserver. I then want to access these files in JavaScript and process them in there. And thats where the trouble starts... This is cross-origin-ressource-sharing and I cannot make a Cross-Origin XMLHttpRequest since this is forbidden due to security reasons. How am

How to enable CORS properly in Spring Restfull WebService?

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问题 what i trying to achieve is consume my spring restful web service in another domain, but when i excute the json url that generated JSON value, my javascript console generate this error : Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://localhost:8080/SpringServiceJsonSample/service/updatepool/1. (Reason: CORS header 'Access-Control-Allow-Origin' missing). Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote

Unable to access swagger despite cors enabled Asp.NET WebAPI

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问题 I have a WebAPI - .NET framework 4.6.2 I am getting below error on the accessing the webapi via swagger: Can't read from server. It may not have the appropriate access-control-origin settings. I have already CORS in my code I wonder what is going worng WebAPIConfig.cs public static class WebApiConfig { public static void Register(HttpConfiguration config) { config.EnableCors(); } } GlobalAsax.cs protected void Application_Start() { RouteTable.Routes.MapOwinPath("swagger", app => { app

“Request header field Access-Control-Allow-Origin is not allowed by Access-Control-Allow-Headers in preflight response” despite valid CORS config

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问题 I created an API endpoint using Google Cloud Functions and am trying to call it from a JS fetch function. I am running into errors that I am pretty sure are related to either CORS or the output format, but I'm not really sure what is going on. A few other SO questions are similar, and helped me realize I needed to remove the mode: "no-cors" . Most mention enabling CORS on the BE, so I added response.headers.set('Access-Control-Allow-Origin', '*') - which I learned of in this article - to