# CORS

## 全局 CORS 配置 <a href="#global-cors-configuration" id="global-cors-configuration"></a>

```yaml
spring:
  cloud:
    gateway:
      globalcors:
        add-to-simple-url-handler-mapping: true
        cors-configurations:
          '[/**]':
            allowedOrigins: "https://docs.spring.io"
            allowedMethods:
            - GET
```

在上述示例中，允许来自 docs.spring.io 发起的CORS请求，适用于所有 GET 请求的路径。&#x20;

**如果想要为那些未被某个网关路由谓词处理的请求提供相同的 CORS 配置，您可以将spring.cloud.gateway.globalcors.add-to-simple-url-handler-mapping 属性设置为true。**&#x8FD9;个属性的作用是将全局的CORS配置添加到简单的URL处理映射中。这在处理 CORS 预检请求时非常有用，特别是当您的路由谓词不返回 true，因为 HTTP 方法是 OPTIONS 时。简而言之，<mark style="color:blue;">**这个属性的设置允许全局的 CORS 配置应用于未被特定网关路由处理的请求。**</mark>

## 路由 CORS 配置 <a href="#route-cors-configuration" id="route-cors-configuration"></a>

“路由”配置允许直接将 CORS 作为元数据应用于一个路由，使用键名为 cors。

```yaml
spring:
  cloud:
    gateway:
      routes:
      - id: cors_route
        uri: https://example.org
        predicates:
        - Path=/service/**
        metadata:
          cors:
            allowedOrigins: '*'
            allowedMethods:
              - GET
              - POST
            allowedHeaders: '*'
            maxAge: 30
```

**如果路由中没有路径谓词（Path predicate），则将应用'/\*\*'作为默认路径。**


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://bohans.gitbook.io/ji-chu/spring/group-1/spring-cloud/wang-guan-spring-cloud-gateway/spring-cloud-gateway/cors.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.