Merge pull request #7277 from eugenp/BAEL-3036_CORS

BAEL-3036 Update Cors with Spring article and create the code

spring-rest-simple/src/main/java/com/baeldung/cors/Account.java

@@ -0,0 +1,9 @@
+package com.baeldung.cors;
+
+public class Account {
+    private Long id;
+
+    public Account(Long id) {
+        this.id = id;
+    }
+}

spring-rest-simple/src/main/java/com/baeldung/cors/AccountController.java

@@ -0,0 +1,24 @@
+package com.baeldung.cors;
+
+import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+@CrossOrigin(maxAge = 3600)
+@RestController
+@RequestMapping("/account")
+public class AccountController {
+
+    @CrossOrigin("http://example.com")
+    @RequestMapping("/{id}")
+    public Account retrieve(@PathVariable Long id) {
+        return new Account(id);
+    }
+
+    @RequestMapping(method = RequestMethod.DELETE, path = "/{id}")
+    public void remove(@PathVariable Long id) {
+        // ...
+    }
+}

spring-rest-simple/src/main/java/com/baeldung/cors/WebConfig.java

@@ -0,0 +1,16 @@
+package com.baeldung.cors;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+@EnableWebMvc
+public class WebConfig implements WebMvcConfigurer {
+
+    @Override
+    public void addCorsMappings(CorsRegistry registry) {
+        registry.addMapping("/**");
+    }
+}

spring-rest-simple/src/main/webapp/WEB-INF/spring-web-config.xml

@@ -0,0 +1,25 @@
+<beans xmlns="http://www.springframework.org/schema/beans"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xmlns:mvc="http://www.springframework.org/schema/mvc"
+       xsi:schemaLocation="http://www.springframework.org/schema/beans
+        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
+        http://www.springframework.org/schema/mvc
+        http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">
+
+    <mvc:cors>
+
+        <mvc:mapping path="/api/**"
+                     allowed-origins="http://domain1.com, http://domain2.com"
+                     allowed-methods="GET, PUT"
+                     allowed-headers="header1, header2, header3"
+                     exposed-headers="header1, header2" allow-credentials="false"
+                     max-age="123" />
+
+        <mvc:mapping path="/resources/**"
+                     allowed-origins="http://domain1.com" />
+
+    </mvc:cors>
+
+    <mvc:view-controller path="/welcome.html"/>
+
+</beans>