Fix file upload issue

Author: esadakcam

server/api-gw/src/main/java/com/continiousdisappointment/apigw/config/FileUploadProxyController.java

@@ -0,0 +1,85 @@
+package com.continiousdisappointment.apigw.config;
+
+import org.springframework.core.env.Environment;
+import org.springframework.http.*;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.client.RestTemplate;
+import org.springframework.web.multipart.MultipartHttpServletRequest;
+
+import lombok.RequiredArgsConstructor;
+
+import jakarta.servlet.http.HttpServletRequest;
+import java.util.Arrays;
+
+@RestController
+@RequiredArgsConstructor
+public class FileUploadProxyController {
+
+    private final Environment environment;
+    private final RestTemplate restTemplate;
+
+    @PostMapping("/genai/**")
+    public ResponseEntity<?> proxyMultipartRequest(
+            HttpServletRequest request,
+            @RequestHeader HttpHeaders headers) {
+
+        try {
+            // Extract the remaining path after /genai
+            String requestPath = request.getRequestURI();
+            String targetPath = requestPath; // Keep the full path including /genai
+
+            // Build target URL
+            String genaiServiceUrl = getGenAiServiceUrl();
+            String targetUrl = genaiServiceUrl + targetPath;
+
+            // Prepare headers for forwarding (exclude host and content-length)
+            HttpHeaders forwardHeaders = new HttpHeaders();
+            headers.forEach((name, values) -> {
+                String lowerName = name.toLowerCase();
+                if (!lowerName.equals("host") && !lowerName.equals("content-length")) {
+                    forwardHeaders.put(name, values);
+                }
+            });
+
+            // Check if this is a multipart request
+            if (request instanceof MultipartHttpServletRequest multipartRequest) {
+                // Handle multipart request
+                MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
+
+                // Add all multipart files
+                multipartRequest.getFileMap().forEach((name, file) -> {
+                    body.add(name, file.getResource());
+                });
+
+                // Add all form parameters
+                multipartRequest.getParameterMap().forEach((name, values) -> {
+                    for (String value : values) {
+                        body.add(name, value);
+                    }
+                });
+
+                forwardHeaders.setContentType(MediaType.MULTIPART_FORM_DATA);
+
+                HttpEntity<MultiValueMap<String, Object>> entity = new HttpEntity<>(body, forwardHeaders);
+                return restTemplate.postForEntity(targetUrl, entity, Object.class);
+            } else {
+                // Handle non-multipart request
+                HttpEntity<Object> entity = new HttpEntity<>(forwardHeaders);
+                return restTemplate.postForEntity(targetUrl, entity, Object.class);
+            }
+
+        } catch (Exception e) {
+            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+                    .body("Proxy error: " + e.getMessage());
+        }
+    }
+
+    private String getGenAiServiceUrl() {
+        if (Arrays.asList(environment.getActiveProfiles()).contains("dev")) {
+            return "http://localhost:8000";
+        }
+        return "http://genai-service:8000";
+    }
+}

server/api-gw/src/main/java/com/continiousdisappointment/apigw/config/MultipartConfig.java

@@ -0,0 +1,16 @@
+package com.continiousdisappointment.apigw.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.multipart.support.StandardServletMultipartResolver;
+
+@Configuration
+public class MultipartConfig {
+
+    @Bean
+    public StandardServletMultipartResolver multipartResolver() {
+        StandardServletMultipartResolver resolver = new StandardServletMultipartResolver();
+        resolver.setResolveLazily(true);
+        return resolver;
+    }
+}

server/api-gw/src/main/java/com/continiousdisappointment/apigw/config/RestTemplateConfig.java

@@ -0,0 +1,14 @@
+package com.continiousdisappointment.apigw.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.RestTemplate;
+
+@Configuration
+public class RestTemplateConfig {
+
+    @Bean
+    public RestTemplate restTemplate() {
+        return new RestTemplate();
+    }
+}

server/api-gw/src/main/resources/application-dev.yml

@@ -5,18 +5,13 @@ spring:
     gateway:
       mvc:
         routes:
-          - id: genai
-            uri: http://localhost:8000
-            predicates:
-              - Path=/genai/**
-          - id: chat
+          - id: user
             uri: http://localhost:8081
             predicates:
               - Path=/user/**
-          - id: user
+          - id: chat
             uri: http://localhost:8082
             predicates:
               - Path=/chat/**
-
 server:
   port: 8080

server/api-gw/src/main/resources/application.yaml

@@ -7,10 +7,6 @@ spring:
     gateway:
       mvc:
         routes:
-          - id: genai
-            uri: http://genai-service:8000
-            predicates:
-              - Path=/genai/**
           - id: user
             uri: http://user-service:8081
             predicates: