Updated Upload error

- Added header expose
- Updated download UI logic

src/main/java/de/w665/sharepulse/rest/mappings/Download.java

@@ -68,6 +68,7 @@ public class Download extends ApiRestController {
         headers.add(HttpHeaders.CACHE_CONTROL, "no-cache, no-store, must-revalidate");
         headers.add(HttpHeaders.PRAGMA, "no-cache");
         headers.add(HttpHeaders.EXPIRES, "0");
+        headers.add(HttpHeaders.ACCESS_CONTROL_EXPOSE_HEADERS, "Content-Disposition");
 
         return ResponseEntity.ok()
                 .headers(headers)

src/main/java/de/w665/sharepulse/rest/mappings/Upload.java

@@ -45,6 +45,14 @@ public class Upload extends ApiRestController {
         }
 
         FileUpload fileUpload = fileService.processUploadedFile(file, request.getRemoteAddr(), passwordProtected, singleDownload, fileDescription);
+
+        if(fileUpload == null) {
+            log.debug("File Upload failed for IP: " + request.getRemoteAddr());
+            Map<String, Object> response = new HashMap<>();
+            response.put("message", "FileUpload failed. FileName might have invalid characters.");
+            return new ResponseEntity<>(response, HttpStatus.BAD_REQUEST);
+        }
+
         log.debug("User uploaded file " + file.getOriginalFilename() + " from IP " + request.getRemoteAddr() + " successfully.");
 
         Map<String, Object> response = new HashMap<>();

src/main/java/de/w665/sharepulse/service/FileService.java

@@ -3,7 +3,6 @@ package de.w665.sharepulse.service;
 import de.w665.sharepulse.db.repo.FileUploadRepository;
 import de.w665.sharepulse.model.FileUpload;
 import jakarta.annotation.PostConstruct;
-import lombok.AllArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.tomcat.util.http.fileupload.FileUtils;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -71,6 +70,14 @@ public class FileService {
             password = fileSecurityService.generateFilePassword();
         }
 
+        /*String encodedFileName = "";
+        try {
+            encodedFileName = URLEncoder.encode(file.getOriginalFilename(), StandardCharsets.UTF_8.toString());
+        } catch (UnsupportedEncodingException e) {
+            log.error("Error encoding file name: " + e.getMessage());
+            return null;
+        }*/
+
         FileUpload fileUpload = FileUpload.builder()
                 .fileId(fileId)
                 .fileName(file.getOriginalFilename())