【file】增加默认渲染头像的逻辑

kernel-d-file/file-api/src/main/java/cn/stylefeng/roses/kernel/file/expander/FileConfigExpander.java

@@ -72,4 +72,14 @@ public class FileConfigExpander {
         return ConfigContext.me().getSysConfigValueWithDefault("SYS_LOCAL_FILE_SAVE_PATH_WINDOWS", String.class, new LocalFileProperties().getLocalFileSavePathWin());
     }
 
+    /**
+     * 默认的系统头像，base64编码的
+     *
+     * @author fengshuonan
+     * @date 2020/12/29 20:10
+     */
+    public static String getDefaultAvatarBase64() {
+        return ConfigContext.me().getSysConfigValueWithDefault("SYS_DEFAULT_AVATAR_BASE64", String.class, FileConstants.DEFAULT_BASE_64_AVATAR);
+    }
+
 }

kernel-d-file/file-api/src/main/java/cn/stylefeng/roses/kernel/file/util/DownloadUtil.java

@@ -9,6 +9,7 @@ import cn.stylefeng.roses.kernel.file.exception.FileException;
 import cn.stylefeng.roses.kernel.file.exception.enums.FileExceptionEnum;
 import lombok.extern.slf4j.Slf4j;
 
+import javax.servlet.ServletOutputStream;
 import javax.servlet.http.HttpServletResponse;
 import java.io.File;
 import java.io.IOException;
@@ -73,4 +74,26 @@ public class DownloadUtil {
         download(fileName, fileBytes, response);
     }
 
+    /**
+     * 渲染被预览的文件到servlet的response流中
+     *
+     * @author fengshuonan
+     * @date 2020/11/29 17:13
+     */
+    public static void renderPreviewFile(HttpServletResponse response, byte[] fileBytes) {
+        try {
+            // 设置contentType
+            response.setContentType("image/png");
+
+            // 获取outputStream
+            ServletOutputStream outputStream = response.getOutputStream();
+
+            // 输出字节流
+            IoUtil.write(outputStream, true, fileBytes);
+        } catch (IOException e) {
+            String userTip = StrUtil.format(FileExceptionEnum.WRITE_BYTES_ERROR.getUserTip(), e.getMessage());
+            throw new FileException(FileExceptionEnum.WRITE_BYTES_ERROR, userTip);
+        }
+    }
+
 }

kernel-d-file/file-business/src/main/java/cn/stylefeng/roses/kernel/file/modular/controller/SysFileInfoController.java

@@ -1,11 +1,14 @@
 package cn.stylefeng.roses.kernel.file.modular.controller;
 
+import cn.hutool.core.codec.Base64;
 import cn.hutool.core.util.ObjectUtil;
 import cn.hutool.core.util.StrUtil;
 import cn.stylefeng.roses.kernel.file.exception.FileException;
 import cn.stylefeng.roses.kernel.file.exception.enums.FileExceptionEnum;
+import cn.stylefeng.roses.kernel.file.expander.FileConfigExpander;
 import cn.stylefeng.roses.kernel.file.modular.service.SysFileInfoService;
 import cn.stylefeng.roses.kernel.file.pojo.request.SysFileInfoRequest;
+import cn.stylefeng.roses.kernel.file.util.DownloadUtil;
 import cn.stylefeng.roses.kernel.resource.api.annotation.ApiResource;
 import cn.stylefeng.roses.kernel.resource.api.annotation.GetResource;
 import cn.stylefeng.roses.kernel.resource.api.annotation.PostResource;
@@ -21,6 +24,7 @@ import org.springframework.web.multipart.MultipartFile;
 import javax.annotation.Resource;
 import javax.servlet.http.HttpServletResponse;
 
+import static cn.stylefeng.roses.kernel.file.constants.FileConstants.DEFAULT_AVATAR_FILE_OBJ_NAME;
 import static cn.stylefeng.roses.kernel.file.constants.FileConstants.FILE_PREVIEW_URL;
 
 /**
@@ -88,14 +92,22 @@ public class SysFileInfoController {
             throw new FileException(FileExceptionEnum.PREVIEW_EMPTY_ERROR, userTip);
         }
 
+        // 文件是-1则返回系统默认头像
+        if (DEFAULT_AVATAR_FILE_OBJ_NAME.equals(sysFileInfoRequest.getFileObjectName())) {
+            DownloadUtil.renderPreviewFile(response, Base64.decode(FileConfigExpander.getDefaultAvatarBase64()));
+            return;
+        }
+
         // 文件id不为空，则根据文件id预览
         if (ObjectUtil.isNotEmpty(sysFileInfoRequest.getFileId())) {
             sysFileInfoService.previewByFileId(sysFileInfoRequest, response);
+            return;
         }
 
         // 文件bucketName和objectName不为空，则根据bucket预览
         if (ObjectUtil.isAllNotEmpty(sysFileInfoRequest.getFileBucket(), sysFileInfoRequest.getFileObjectName())) {
             sysFileInfoService.previewByBucketAndObjName(sysFileInfoRequest, response);
+            return;
         }
 
         // 提示用户信息不全

kernel-d-file/file-business/src/main/java/cn/stylefeng/roses/kernel/file/modular/service/impl/SysFileInfoServiceImpl.java

@@ -2,7 +2,6 @@ package cn.stylefeng.roses.kernel.file.modular.service.impl;
 
 import cn.hutool.core.bean.BeanUtil;
 import cn.hutool.core.convert.Convert;
-import cn.hutool.core.io.IoUtil;
 import cn.hutool.core.util.NumberUtil;
 import cn.hutool.core.util.ObjectUtil;
 import cn.hutool.core.util.StrUtil;
@@ -28,13 +27,11 @@ import com.baomidou.mybatisplus.core.toolkit.IdWorker;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import lombok.extern.slf4j.Slf4j;
-import org.springframework.http.MediaType;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.multipart.MultipartFile;
 
 import javax.annotation.Resource;
-import javax.servlet.ServletOutputStream;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.math.BigDecimal;
@@ -137,7 +134,7 @@ public class SysFileInfoServiceImpl extends ServiceImpl<SysFileInfoMapper, SysFi
 
         // 如果是图片类型，则直接输出
         if (PicFileTypeUtil.getFileImgTypeFlag(fileSuffix)) {
-            renderPreviewFile(response, fileBytes);
+            DownloadUtil.renderPreviewFile(response, fileBytes);
         } else {
             // 不支持别的文件预览
             throw new FileException(FileExceptionEnum.PREVIEW_ERROR_NOT_SUPPORT);
@@ -158,7 +155,7 @@ public class SysFileInfoServiceImpl extends ServiceImpl<SysFileInfoMapper, SysFi
 
         // 如果是图片类型，则直接输出
         if (PicFileTypeUtil.getFileImgTypeFlag(sysFileInfoRequest.getFileObjectName())) {
-            renderPreviewFile(response, fileBytes);
+            DownloadUtil.renderPreviewFile(response, fileBytes);
         } else {
             // 不支持别的文件预览
             throw new FileException(FileExceptionEnum.PREVIEW_ERROR_NOT_SUPPORT);
@@ -278,26 +275,4 @@ public class SysFileInfoServiceImpl extends ServiceImpl<SysFileInfoMapper, SysFi
         return queryWrapper;
     }
 
-    /**
-     * 渲染被预览的文件到servlet的response流中
-     *
-     * @author fengshuonan
-     * @date 2020/11/29 17:13
-     */
-    private void renderPreviewFile(HttpServletResponse response, byte[] fileBytes) {
-        try {
-            // 设置contentType
-            response.setContentType(MediaType.IMAGE_PNG_VALUE);
-
-            // 获取outputStream
-            ServletOutputStream outputStream = response.getOutputStream();
-
-            // 输出字节流
-            IoUtil.write(outputStream, true, fileBytes);
-        } catch (IOException e) {
-            String userTip = StrUtil.format(FileExceptionEnum.WRITE_BYTES_ERROR.getUserTip(), e.getMessage());
-            throw new FileException(FileExceptionEnum.WRITE_BYTES_ERROR, userTip);
-        }
-    }
-
 }