| | |
| | | import java.io.OutputStream; |
| | | import java.io.UnsupportedEncodingException; |
| | | import java.net.URLEncoder; |
| | | import java.nio.charset.StandardCharsets; |
| | | import javax.servlet.http.HttpServletRequest; |
| | | import javax.servlet.http.HttpServletResponse; |
| | | import org.apache.commons.lang3.ArrayUtils; |
| | | import com.ruoyi.common.utils.StringUtils; |
| | | |
| | | /** |
| | | * 文件处理工具类 |
| | |
| | | } |
| | | |
| | | /** |
| | | * 检查文件是否可下载 |
| | | * |
| | | * @param resource 需要下载的文件 |
| | | * @return true 正常 false 非法 |
| | | */ |
| | | public static boolean checkAllowDownload(String resource) |
| | | { |
| | | // 禁止目录上跳级别 |
| | | if (StringUtils.contains(resource, "..")) |
| | | { |
| | | return false; |
| | | } |
| | | |
| | | // 检查允许下载的文件规则 |
| | | if (ArrayUtils.contains(MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION, FileTypeUtils.getFileType(resource))) |
| | | { |
| | | return true; |
| | | } |
| | | |
| | | // 不在允许下载的文件规则 |
| | | return false; |
| | | } |
| | | |
| | | /** |
| | | * 下载文件名重新编码 |
| | | * |
| | | * @param request 请求对象 |
| | | * @param fileName 文件名 |
| | | * @return 编码后的文件名 |
| | | */ |
| | | public static String setFileDownloadHeader(HttpServletRequest request, String fileName) |
| | | throws UnsupportedEncodingException |
| | | public static String setFileDownloadHeader(HttpServletRequest request, String fileName) throws UnsupportedEncodingException |
| | | { |
| | | final String agent = request.getHeader("USER-AGENT"); |
| | | String filename = fileName; |
| | |
| | | } |
| | | return filename; |
| | | } |
| | | |
| | | /** |
| | | * 下载文件名重新编码 |
| | | * |
| | | * @param response 响应对象 |
| | | * @param realFileName 真实文件名 |
| | | * @return |
| | | */ |
| | | public static void setAttachmentResponseHeader(HttpServletResponse response, String realFileName) throws UnsupportedEncodingException |
| | | { |
| | | String percentEncodedFileName = percentEncode(realFileName); |
| | | |
| | | StringBuilder contentDispositionValue = new StringBuilder(); |
| | | contentDispositionValue.append("attachment; filename=") |
| | | .append(percentEncodedFileName) |
| | | .append(";") |
| | | .append("filename*=") |
| | | .append("utf-8''") |
| | | .append(percentEncodedFileName); |
| | | |
| | | response.setHeader("Content-disposition", contentDispositionValue.toString()); |
| | | } |
| | | |
| | | /** |
| | | * 百分号编码工具方法 |
| | | * |
| | | * @param s 需要百分号编码的字符串 |
| | | * @return 百分号编码后的字符串 |
| | | */ |
| | | public static String percentEncode(String s) throws UnsupportedEncodingException |
| | | { |
| | | String encode = URLEncoder.encode(s, StandardCharsets.UTF_8.toString()); |
| | | return encode.replaceAll("\\+", "%20"); |
| | | } |
| | | } |