The @crossorigin annotation is not working correctly. Following the tutorial provided here: https://spring.io/guides/gs/rest-service-cors/ the following should work -
package com.example.restservicecors;
import java.util.concurrent.atomic.AtomicLong;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class GreetingController {
private static final String template = "Hello, %s!";
private final AtomicLong counter = new AtomicLong();
@CrossOrigin(origins = "http://localhost:8080")
@GetMapping("/greeting")
public Greeting greeting(@RequestParam(required = false, defaultValue = "World") String name) {
System.out.println("==== get greeting ====");
return new Greeting(counter.incrementAndGet(), String.format(template, name));
}
}
I have in my application the following which is similar (and suggested by other tutorials online). I have also attempted the above. This is in Kotlin -
@RestController
@CrossOrigin(origins = ["http://localhost:3000"], maxAge=3600, allowCredentials = "true")
@RequestMapping("/test")
public class RequestTest{
@GetMapping
@CrossOrigin(origins = ["http://localhost:3000"], maxAge=3600, allowCredentials = "true")
fun stringfunc():String{
println("inside the index of requesttest")
return "some string"
}
@RequestMapping("/comment")
@CrossOrigin(origins = ["http://localhost:3000"], maxAge=3600, allowCredentials = "true")
fun getComment() : Comment {
val comment = Comment(
author = "test",
content = "test",
)
return comment
}
@PostMapping("/post")
@CrossOrigin(origins = ["http://localhost:3000"], maxAge=3600, allowCredentials = "true")
fun postCustomer(@Valid @RequestBody comment: Comment): String{
println("value of customer $comment")
val author = comment.author;
println("value of author $author")
return "dfs"
}
}
I have attempted several versions of the above including only putting the @CrossOrigin on the functions, only on the class, and both as shown above. I have also attempted to not include origins, include origins=["*"], and also included and not included both maxAge and allowCredentials.
Java version is 11, spring-boot version is 2.5.1, and kotlin version is 1.5.10.
There is a stackoverflow issue here: https://stackoverflow.com/questions/68147489/cors-preflight-error-in-kotlin-and-springboot
The following is my pom.xml file
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.1</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>art</groupId>
<artifactId>kotlin_server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>kotlin_server</name>
<description>Kotlin Project Server</description>
<properties>
<java.version>11</java.version>
<kotlin.version>1.5.10</kotlin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<!--
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
<version>2.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>2.0.1.Final</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-kotlin</artifactId>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-reflect</artifactId>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib-jdk8</artifactId>
</dependency>
<!-- <dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-bom</artifactId>
<version>Dysprosium-SR1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-core</artifactId>
</dependency> -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.projectreactor.kotlin</groupId>
<artifactId>reactor-kotlin-extensions</artifactId>
<version>1.1.3</version>
</dependency>
</dependencies>
<build>
<sourceDirectory>${project.basedir}/src/main/kotlin</sourceDirectory>
<testSourceDirectory>${project.basedir}/src/test/kotlin</testSourceDirectory>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-plugin</artifactId>
<configuration>
<args>
<arg>-Xjsr305=strict</arg>
</args>
<compilerPlugins>
<plugin>spring</plugin>
</compilerPlugins>
</configuration>
<dependencies>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-allopen</artifactId>
<version>${kotlin.version}</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
Comment From: wilkinsona
It looks like someone is already trying to help you on Stack Overflow. To avoid wasting their time, and the time of anyone else who tries to help you there, I’m going to close this issue for now. If it turns out that there is a bug in Spring Boot we can re-open this issue and address it.