T13_0901

上傳/下載圖片時用本身圖片名稱+(_repaired.jpg) ✅

下載時中文名稱的圖片無法下載：(✅)

原始程式碼：

@RestController
@RequestMapping("/download")
public class DownloadController {
    @GetMapping
    public ResponseEntity<byte[]> proxyDownload(@RequestParam("url") String fileUrl,@RequestParam("filename") String filename) {
        try {
            URL url = new URL(fileUrl);
            URLConnection conn = url.openConnection();
            conn.setRequestProperty("User-Agent", "Mozilla/5.0"); // 防止被拒絕存取

            try (InputStream is = conn.getInputStream()) {
                byte[] content = is.readAllBytes();
                return ResponseEntity.ok()
                    .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + filename + "\"")
                    .contentType(MediaType.APPLICATION_OCTET_STREAM).body(content);
            }
        } catch (Exception e) {
            e.printStackTrace();
            return ResponseEntity.internalServerError().body(null);
        }
    }
}

修正後程式碼：

@RestController
@RequestMapping("/download")
public class DownloadController {
    @GetMapping
    public ResponseEntity<byte[]> proxyDownload(@RequestParam("url") String fileUrl,@RequestParam("filename") String filename) {
        try {
            URL url = new URL(fileUrl);
            URLConnection conn = url.openConnection();
            conn.setRequestProperty("User-Agent", "Mozilla/5.0"); // 防止被拒絕存取
            InputStream is = conn.getInputStream();
            try {
                byte[] content = is.readAllBytes();
                
                // 英文備用檔名
                String asciiFilename = "download.jpg";
                // 中文檔名 encode
                String encodedFilename = URLEncoder.encode(filename, StandardCharsets.UTF_8).replaceAll("\\+", "%20");
                String contentDisposition = "attachment; filename=\"" + asciiFilename + "\"; filename*=UTF-8''"+ encodedFilename;

                ResponseEntity<byte[]> responseEntity = ResponseEntity.ok()
                .header("Content-Disposition", contentDisposition)
                .contentType(MediaType.APPLICATION_OCTET_STREAM).body(content);

                if (is != null) {
                    is.close();
				}
                return responseEntity;
            } catch (Throwable throwable) {
                if (is != null) {
                    try {
                        is.close();
                    } catch (Throwable throwable1) {

                        throwable.addSuppressed(throwable1);
                    }
                }
                throw throwable;
            }
        } catch (Exception e) {
            e.printStackTrace();
            return ResponseEntity.internalServerError().body(null);
        }
    }
}

小小的修正一下歷史圖片的手機版(header)的文字大小