Add files via upload

src/main/java/stirling/software/SPDF/controller/OverlayImageController.java

@@ -0,0 +1,47 @@
+package stirling.software.SPDF.controller;
+
+import java.io.IOException;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.multipart.MultipartFile;
+
+import stirling.software.SPDF.utils.PdfUtils;
+
+@Controller
+public class OverlayImageController {
+
+	private static final Logger logger = LoggerFactory.getLogger(OverlayImageController.class);
+
+	@GetMapping("/add-image")
+	public String overlayImage() {
+		return "add-image";
+	}
+
+	@PostMapping("/add-image")
+	public ResponseEntity<byte[]> overlayImage(@RequestParam("fileInput") MultipartFile pdfFile,
+			@RequestParam("fileInput2") MultipartFile imageFile, @RequestParam("x") float x,
+			@RequestParam("y") float y) {
+		try {
+			byte[] pdfBytes = pdfFile.getBytes();
+			byte[] imageBytes = imageFile.getBytes();
+			byte[] result = PdfUtils.overlayImage(pdfBytes, imageBytes, x, y);
+			HttpHeaders headers = new HttpHeaders();
+			headers.setContentType(MediaType.APPLICATION_PDF);
+			headers.setContentDispositionFormData("attachment", "overlayed.pdf");
+			headers.setCacheControl("must-revalidate, post-check=0, pre-check=0");
+			return new ResponseEntity<>(result, headers, HttpStatus.OK);
+		} catch (IOException e) {
+			logger.error("Failed to add image to PDF", e);
+			return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
+		}
+	}
+}