add: cors config and rest template config

src/main/java/kr/co/helloplum/config/RestTemplateConfig.java

@@ -0,0 +1,30 @@
+package kr.co.helloplum.config;
+
+import java.nio.charset.StandardCharsets;
+import java.time.Duration;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.client.BufferingClientHttpRequestFactory;
+import org.springframework.http.client.SimpleClientHttpRequestFactory;
+import org.springframework.http.converter.StringHttpMessageConverter;
+import org.springframework.web.client.RestTemplate;
+
+@Configuration
+public class RestTemplateConfig {
+
+	@Bean
+	public RestTemplateBuilder restTemplateBuilder() {
+		return new RestTemplateBuilder();
+	}
+
+	@Bean
+	public RestTemplate restTemplate() {
+		return restTemplateBuilder()
+			.requestFactory(() -> new BufferingClientHttpRequestFactory(new SimpleClientHttpRequestFactory()))
+			.setConnectTimeout(Duration.ofMillis(5000)) // connection-timeout
+			.setReadTimeout(Duration.ofMillis(5000)) // read-timeout
+			.additionalMessageConverters(new StringHttpMessageConverter(StandardCharsets.UTF_8))
+			.build();
+	}
+}

src/main/java/kr/co/helloplum/config/WebMvcConfig.java

@@ -0,0 +1,34 @@
+package kr.co.helloplum.config;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpMethod;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class WebMvcConfig implements WebMvcConfigurer {
+	private final String localhost = "http://localhost:";
+	private final int allowedPort = 3000;
+	private List<String> allowedOrigins = new ArrayList<>();
+
+	// CORS
+	@Override
+	public void addCorsMappings(CorsRegistry registry) {
+		// 허용할 origin 목록
+		allowedOrigins.add(localhost + allowedPort);
+
+		registry.addMapping("/**")
+			.allowedOrigins(allowedOrigins.toArray(new String[allowedOrigins.size()]))
+			.allowedMethods(
+				HttpMethod.GET.name(),
+				HttpMethod.HEAD.name(),
+				HttpMethod.POST.name(),
+				HttpMethod.PUT.name(),
+				HttpMethod.PATCH.name(),
+				HttpMethod.DELETE.name())
+			.maxAge(3000); // pre-flight 리퀘스트를 캐싱
+	}
+}