Merge pull request #8315 from albanoj2/BAEL-3559

BAEL-3559: Added purpose-built endpoint for testing multipart uploads with HttpClient

spring-mvc-java/src/main/java/com/baeldung/web/controller/MultipartFileUploadStubController.java

@@ -0,0 +1,58 @@
+package com.baeldung.web.controller;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.multipart.MultipartFile;
+
+@Controller
+public class MultipartFileUploadStubController {
+
+    @PostMapping("/stub/multipart")
+    public ResponseEntity<UploadResultResource> uploadFile(MultipartFile file, String text, String text1, String text2, MultipartFile upstream) {
+        UploadResultResource result = new UploadResultResource(file, text, text1, text2, upstream);
+        return new ResponseEntity<>(result, HttpStatus.OK);
+    }
+    
+    public static class UploadResultResource {
+        
+        private final String file;
+        private final String text;
+        private final String text1;
+        private final String text2;
+        private final String upstream;
+        
+        public UploadResultResource(MultipartFile file, String text, String text1, String text2, MultipartFile upstream) {
+            this.file = format(file);
+            this.text = text;
+            this.text1 = text1;
+            this.text2 = text2;
+            this.upstream = format(upstream);
+        }
+        
+        private static String format(MultipartFile file) {
+            return file == null ? null : file.getOriginalFilename() + " (size: " + file.getSize() + " bytes)";
+        }
+
+        public String getFile() {
+            return file;
+        }
+
+        public String getText() {
+            return text;
+        }
+
+        public String getText1() {
+            return text1;
+        }
+
+        public String getText2() {
+            return text2;
+        }
+
+        public String getUpstream() {
+            return upstream;
+        }
+    }
+}