这个报错是什么意思has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
时间: 2023-07-12 07:02:13 浏览: 117
这个报错意味着浏览器的CORS策略阻止了当前请求。CORS(跨域资源共享)是一种安全策略,用于防止跨域请求在浏览器中发生。如果当前请求与请求的资源不在同一个域中,且服务器端未正确设置响应头中的CORS相关信息,则浏览器将会阻止该请求。在这个特定的情况下,服务器端没有在响应头中设置'Access-Control-Allow-Origin'字段,因此浏览器拒绝了该请求。解决方法通常是在服务器端设置正确的CORS响应头,以允许请求跨域。
相关问题
has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin'
这个错误是由于浏览器的安全机制引起的,称为CORS(跨域资源共享)策略。它限制了通过JavaScript发起的跨域请求。当浏览器通过预检请求(preflight request)检查跨域请求时,如果服务器没有返回正确的Access-Control-Allow-Origin响应头,就会出现这个错误。
要解决这个问题,可以在服务器端设置响应头Access-Control-Allow-Origin,将其值设置为允许访问的域名或通配符*(表示允许任何域名访问)。例如,在使用Node.js的Express框架时,可以使用以下代码设置响应头:
```javascript
app.use(function (req, res, next) {
res.setHeader('Access-Control-Allow-Origin', '*');
next();
});
```
如果你没有直接控制服务器代码的权限,可以尝试联系服务器管理员或开发人员,请求他们添加适当的响应头来解决这个问题。
has been blocked by CORS policy: Response to preflight request doesn‘t pass access control check
回答: "has been blocked by CORS policy: Response to preflight request doesn't pass access control check"是一个常见的跨域访问问题。它意味着在请求资源时,由于缺少'Access-Control-Allow-Origin'头部,在跨域请求的响应中被阻止。解决这个问题的方法是在响应的头部中添加'Access-Control-Allow-Origin'头部,指定允许访问的域名或通配符"*"来解决跨域访问问题。你可以参考提供的链接中的解决方案来解决这个问题。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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