add file upload service (#28)

Co-authored-by: Rick <linuxsuren@users.noreply.github.com>

Author: LinuxSuRen

src/main/java/io/github/devopsws/demo/config/WebSecurityConfig.java

@@ -9,7 +9,6 @@
 import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.provisioning.InMemoryUserDetailsManager;
 import org.springframework.security.web.SecurityFilterChain;
-import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
 import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
 import static org.springframework.security.config.Customizer.withDefaults;
 

src/main/java/io/github/devopsws/demo/service/FileService.java

@@ -0,0 +1,31 @@
+package io.github.devopsws.demo.service;
+
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+
+import io.github.devopsws.demo.model.Message;
+
+@RestController
+@RequestMapping("/upload")
+public class FileService {
+    @PostMapping("/")
+    public Message<?> upload(@RequestParam("file") MultipartFile file) {
+        System.out.println("Received file uploading request");
+        Message<String> message = new Message<String>();
+        if (!file.isEmpty()) {
+            try {
+                System.out.println("Uploading file size:" + file.getSize());
+
+                message.setMessage("ok");
+            } catch (Exception e) {
+                message.setMessage(e.getMessage());
+            }
+        } else {
+            message.setMessage("file is empty");
+        }
+        return message;
+    }
+}