'Access-Control-Allow-Origin' header contains multiple values '*, *', but only one is allowed. Origin 'null' is therefore not allowed access. 怎么解决??
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在我的Go API中,我使用gin,并且在我的Access-Control-Allow-Origin头中设置了一个值。如果我有多个用户界面,我的react就会抛出一个错误来影响The Access-Control-Allow-Origin header contains multiple values 'http://value1, http://value2', but only one is allowed...。我需要设置多个值。我该怎么做?
API是一个反向代理,下面是相关代码:
func proxy(c *gin.Context) {
var remote = &
我创建API,BackEnd和前端网站。
我使用Express for API,BackEnd - FrontEnd,使用ReactJs
所以在我所在的地方一切正常。但是,当我部署到服务器时,这个错误消息显示
Access to XMLHttpRequest at 'http://domain/headline' from origin 'http://domain' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multipl
我们在一个vue.js应用程序中使用axios来访问Azure函数。现在我们得到了这个错误:
No 'Access-Control-Allow-Origin' header is present on the requested resource.
Origin 'http://localhost:8080' is therefore not allowed access.
我们尝试这样设置函数中的响应头:
context.res = {
body: response.data,
headers: {
'Access-Contro
我目前有一个问题,我设置了一个flask应用程序 CORS(app) 但我得到了每一种COR的错误作为回应。不过,这只会在生产中发生。我收到的错误信息如下 Access to XMLHttpRequest at 'https://example.com' from origin 'https://2e11e606fda6.ngrok.io' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested re
当我使用Axios向PHP文件发出请求时,在控制台上收到此消息
Access to XMLHttpRequest at 'http://cp.com.br/cpnr-upload/' from
origin 'http://localhost:3000' has been blocked by CORS policy: No
'Access-Control-Allow-Origin' header is present on the requested resource.
问题是,目标文件已经在顶部:header('Access-Co
我已经开发了Woocommerce离子型应用程序,但是当我将应用程序与活动站点或服务器连接时,它会给出这个错误:
Access to fetch at 'https://www.example.co.uk/shop/wp-json/v3/products/categories?filter[meta]=true&filter[variation]=true'
from origin 'http://localhost:8100' has been blocked by CORS policy: Response to preflight
当提出请求时,会引发以下错误:
Access to XMLHttpRequest at 'My Server URL' from origin 'Server Name' has been
blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple
values 'Server Name, *', but only one is allowed.
但是,在我的WebApiConfig.cs文件中,我将CORS策略定义如下:
我有一个运行在ubuntu和nginx上的flask-socketio服务器。我有一个客户端在调用服务器。当我尝试调用服务器时,我收到以下错误: has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values '*, *, *, *, *, *, *, *, *, *, *, *, *, *, *, *, *', but only one is allowed. 这是我用flask进行的初始化: socketio = Socke
我在其他领域对Web的CORS请求的制作、放置和删除有一些困难。
我已经通过教程编写了API。
GET和POST请求工作正常,但DELETE和PUT不起作用。
Failed to load resource: the server responded with a status of 405 (Method Not Allowed)
Failed to load resource: No 'Access-Control-Allow-Origin' header is present on the requested resource.
当我向WebConfig添加在上建议的代码
我使用的是rest,它允许本地主机使用CORS。当我使用离子型应用程序的web版本时,我会得到服务器的响应,就像预期的那样。但是当使用android仿真器时,它会给我以下错误,我的Api只允许来自本地主机或来自我的域。如何克服这一问题?
**Msg: Failed to load https://myapi.com/GetAllUsersList: Response to preflight request doesn't pass access control check: The 'Access-Control-Allow-Origin' header contai
我正在开发一个DevExtreme项目,我正在使用Web和SignalR。我有两个项目作为Asp.NET Web API和DevExtreme。我在call.js文件中有一个关于cors的错误。我的代码如下:
http://localhost:40623/signalr/negotiate?clientProtocol=1.5&connectionData=%5B%7B%22name%22%3A%22notificationshub%22%7D%5D&_=1431708909660. A wildcard '*' cannot be used in the
我正在尝试制作一个简单的php后端来处理另一个服务器中的联系人表单,但是尽管添加了适当的头,它仍然给我提供了相同的错误消息:
XMLHttpRequest cannot load https://php-contact-form-lual.herokuapp.com/. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:4000' is therefore not allowed access. The re
我使用react前端和nodeJs v6后端,以及socket.io-redis pub子方法。在这种情况下,浏览器拒绝连接。
我有这个错误:Failed to load https://api.mydomain.com/socket.io-client/?EIO=3&transport=polling&t=M8vzD5C: The 'Access-Control-Allow-Origin' header contains multiple values 'http://localhost:3000, *', but only one is al
我有一个生成JSON文档的PHP文件。
我已经按如下方式设置了header,但仍然收到错误消息。
header('Access-Control-Allow-Origin: *');
header('Content-Type: application/json');
错误消息:
No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://mysubdomain.mydomain.com' is theref
我需要向API发出两个请求,以便在两个不同的表中插入数据:
工作流程:
请求获得最后一个id +1 =>创建我需要的数组(last_id,values)在MySql中插入=> 2,第一次使用变量数据,第二次使用我创建的数组。
router.post("/addentry", function (req, res) {
let sql = "SELECT MAX(id) + 1 AS last_id FROM entries;"; // I get the id
let query = connection
.query(sql