Add rotate and compress (#7)

* Add files via upload

* Update build.gradle

* Update general.css

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

@@ -0,0 +1,45 @@
+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.ui.Model;
+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 ConvertPDFController {
+
+	private static final Logger logger = LoggerFactory.getLogger(ConvertPDFController.class);
+
+	@GetMapping("/convert-pdf")
+	public String convertToPdfForm(Model model) {
+		model.addAttribute("currentPage", "convert-pdf");
+		return "convert-pdf";
+	}
+
+	@PostMapping("/convert-to-pdf")
+	public ResponseEntity<byte[]> convertToPdf(@RequestParam("fileInput") MultipartFile file) throws IOException {
+		// Convert the file to PDF and get the resulting bytes
+		byte[] bytes = PdfUtils.convertToPdf(file.getInputStream());
+		logger.info("File {} successfully converted to pdf", file.getOriginalFilename());
+
+		HttpHeaders headers = new HttpHeaders();
+		headers.setContentType(MediaType.APPLICATION_PDF);
+		String filename = "converted.pdf";
+		headers.setContentDispositionFormData(filename, filename);
+		headers.setCacheControl("must-revalidate, post-check=0, pre-check=0");
+		ResponseEntity<byte[]> response = new ResponseEntity<>(bytes, headers, HttpStatus.OK);
+		return response;
+	}
+}