Send Maia requests as JSON over HTTP1

src/main/kotlin/me/wypark/blogbackend/core/config/MaiaConfig.kt

@@ -4,6 +4,7 @@ import org.springframework.boot.context.properties.ConfigurationProperties
 import org.springframework.boot.context.properties.EnableConfigurationProperties
 import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.Configuration
+import org.springframework.http.client.SimpleClientHttpRequestFactory
 import org.springframework.web.client.RestClient
 import java.time.Duration
 
@@ -16,8 +17,13 @@ class MaiaConfig {
         builder: RestClient.Builder,
         properties: MaiaProperties
     ): RestClient {
+        val requestFactory = SimpleClientHttpRequestFactory().apply {
+            setConnectTimeout(Duration.ofSeconds(5))
+            setReadTimeout(Duration.ofSeconds(120))
+        }
         return builder
             .baseUrl(properties.engineUrl)
+            .requestFactory(requestFactory)
             .build()
     }
 }

src/main/kotlin/me/wypark/blogbackend/domain/chess/MaiaEngineClient.kt

@@ -1,6 +1,7 @@
 package me.wypark.blogbackend.domain.chess
 
 import org.slf4j.LoggerFactory
+import org.springframework.http.MediaType
 import org.springframework.stereotype.Component
 import org.springframework.web.client.RestClient
 import org.springframework.web.client.RestClientException
@@ -26,6 +27,8 @@ class MaiaEngineClient(
             return maiaRestClient
                 .post()
                 .uri(path)
+                .contentType(MediaType.APPLICATION_JSON)
+                .accept(MediaType.APPLICATION_JSON)
                 .body(request)
                 .retrieve()
                 .body(responseType)