From d036f6de7f2919f8e83cd04fdaf7ef5eacf3eb89 Mon Sep 17 00:00:00 2001
From: Wangxin <wangxin@icanag.com>
Date: Thu, 13 Nov 2025 20:23:42 +0800
Subject: [PATCH] =?UTF-8?q?=E3=80=90web=E3=80=91=20=E9=A2=84=E8=A7=88?=
 =?UTF-8?q?=E7=8E=B0=E5=9C=A8=E5=8A=9F=E8=83=BD=E5=AE=9E=E7=8E=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../src/views/QandA/knowledge/index.vue       | 269 ++++++++++++++----
 1 file changed, 219 insertions(+), 50 deletions(-)

diff --git a/ALOps_sys_fe/alops-ui/src/views/QandA/knowledge/index.vue b/ALOps_sys_fe/alops-ui/src/views/QandA/knowledge/index.vue
index 1496d19a..c4d14133 100644
--- a/ALOps_sys_fe/alops-ui/src/views/QandA/knowledge/index.vue
+++ b/ALOps_sys_fe/alops-ui/src/views/QandA/knowledge/index.vue
@@ -27,8 +27,10 @@
               </el-table-column>
               <el-table-column label="操作" align="center" width="240" class-name="small-padding fixed-width">
                 <template slot-scope="scope" v-if="scope.row.id !== 1">
-                  <el-button size="mini" type="text" icon="el-icon-view" @click="previewFile(scope.row)" v-hasPermi="['QandA:knowledge:preview']">预览</el-button>
-                  <el-button size="mini" type="text" icon="el-icon-download" @click="downloadFile(scope.row)" v-hasPermi="['QandA:knowledge:filedownload']">下载</el-button>
+                  <el-button size="mini" type="text" icon="el-icon-view" @click="previewFile(scope.row)" v-hasPermi="['QandA:knowledge:filepreview']">预览</el-button>
+                  <a href="javascript:void(0)" class="el-button el-button--text el-button--mini" @click="downloadFile(scope.row)" v-hasPermi="['QandA:knowledge:filedownload']">
+                    <i class="el-icon el-icon-download"></i> 下载
+                  </a>
                   <el-button size="mini" type="text" icon="el-icon-edit" @click="handleUpdate(scope.row)" v-hasPermi="['QandA:knowledge:update']">修改</el-button>
                   <el-button size="mini" type="text" icon="el-icon-delete" @click="handleDelete(scope.row)" v-hasPermi="['QandA:knowledge:del']">删除</el-button>
                 </template>
@@ -82,7 +84,7 @@
 </template>
 
 <script>
-import { list,  del, add, update, permanentKnowledgeList, uploadedFilesList, downloadFile } from "@/api/QandA/knowledge"
+import { list,  del, add, update, permanentKnowledgeList, uploadedFilesList } from "@/api/QandA/knowledge"
 import { getToken } from "@/utils/auth"
 import Treeselect from "@riophae/vue-treeselect"
 import "@riophae/vue-treeselect/dist/vue-treeselect.css"
@@ -381,61 +383,228 @@ export default {
     submitFileForm() {
       this.$refs.upload.submit()
     },
-    // 预览文件
+    // 预览文件 - 基于二进制数据的预览
     previewFile(row) {
-      // 构建完整的文件路径
-      const filePath = this.appBase + row.filePath;
+      // 获取token
+      const token = this.$store.getters.token;
       
-      // 根据文件格式进行不同处理
+      // 构建下载URL（与下载使用相同的接口）
+      const previewUrl = `${this.appBase}/QandA/knowledge/file/download/${row.id}`;
+      
+      // 创建XMLHttpRequest对象
+      const xhr = new XMLHttpRequest();
+      xhr.open('GET', previewUrl, true);
+      
+      // 设置请求头
+      xhr.setRequestHeader('Authorization', `Bearer ${token}`);
+      
+      // 根据文件类型设置响应类型
       if (row.format === 'txt') {
-        // 对于txt文件，可以通过新窗口打开直接预览
-        window.open(filePath, '_blank');
-      } else if (row.format === 'docx') {
-        // 对于docx文件，可以使用在线预览服务或通过新窗口打开
-        // 这里使用新窗口打开的方式
-        window.open(filePath, '_blank');
-        // 也可以使用在线预览服务，例如：
-        // const previewUrl = `https://view.officeapps.live.com/op/view.aspx?src=${encodeURIComponent(filePath)}`;
-        // window.open(previewUrl, '_blank');
+        xhr.responseType = 'text'; // 文本文件直接获取文本内容
+      } else if (['png', 'jpg', 'jpeg', 'gif', 'bmp'].includes(row.format.toLowerCase())) {
+        xhr.responseType = 'blob'; // 图片文件获取Blob对象
+      } else if (row.format === 'pdf') {
+        xhr.responseType = 'blob'; // PDF文件获取Blob对象
       } else {
-        // 其他文件格式的处理
-        this.$message.info('暂不支持此文件格式的预览');
+        // 其他格式，先尝试获取文本，不行再提示
+        xhr.responseType = 'text';
       }
+      
+      // 请求完成处理函数
+      xhr.onload = function() {
+        if (xhr.status === 200) {
+          if (row.format === 'txt') {
+            // 文本文件预览
+            this.previewTextFile(xhr.response, row.source);
+          } else if (['png', 'jpg', 'jpeg', 'gif', 'bmp'].includes(row.format.toLowerCase())) {
+            // 图片文件预览
+            this.previewImageFile(xhr.response, row.source);
+          } else if (row.format === 'pdf') {
+            // PDF文件预览
+            this.previewPdfFile(xhr.response, row.source);
+          } else if (row.format === 'docx') {
+            // Word文件预览 - 使用在线预览服务
+            const docxUrl = URL.createObjectURL(new Blob([xhr.response]));
+            const onlinePreviewUrl = `https://view.officeapps.live.com/op/view.aspx?src=${encodeURIComponent(docxUrl)}`;
+            window.open(onlinePreviewUrl, '_blank');
+          } else {
+            // 尝试文本预览
+            try {
+              const textContent = xhr.response;
+              if (textContent && textContent.length > 0) {
+                this.previewTextFile(textContent, row.source);
+              } else {
+                this.$message.info('暂不支持此文件格式的预览');
+              }
+            } catch (e) {
+              this.$message.info('暂不支持此文件格式的预览');
+            }
+          }
+        } else {
+          this.$message.error('文件预览失败，请重试');
+        }
+      }.bind(this);
+      
+      // 网络错误处理
+      xhr.onerror = function() {
+        this.$message.error('网络错误，文件预览失败');
+      }.bind(this);
+      
+      // 发送请求
+      xhr.send();
+    },
+    
+    // 预览文本文件
+    previewTextFile(content, fileName) {
+      // 创建预览窗口
+      const previewWindow = window.open('', '_blank', 'width=800,height=600');
+      previewWindow.document.write(`
+        <html>
+          <head>
+            <title>${fileName} - 预览</title>
+            <style>
+              body { font-family: Arial, sans-serif; padding: 20px; margin: 0; background-color: #f5f5f5; }
+              .container { max-width: 100%; margin: 0 auto; background: white; padding: 20px; border-radius: 5px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
+              pre { white-space: pre-wrap; word-wrap: break-word; font-family: 'Courier New', monospace; font-size: 14px; line-height: 1.5; }
+              h1 { margin-top: 0; color: #333; font-size: 20px; }
+            </style>
+          </head>
+          <body>
+            <div class="container">
+              <h1>${fileName}</h1>
+              <pre>${content}</pre>
+            </div>
+          </body>
+        </html>
+      `);
+      previewWindow.document.close();
+    },
+    
+    // 预览图片文件
+    previewImageFile(blob, fileName) {
+      // 创建图片URL
+      const imageUrl = URL.createObjectURL(blob);
+      
+      // 创建预览窗口
+      const previewWindow = window.open('', '_blank', 'width=800,height=600');
+      previewWindow.document.write(`
+        <html>
+          <head>
+            <title>${fileName} - 预览</title>
+            <style>
+              body { margin: 0; padding: 20px; background-color: #f5f5f5; display: flex; justify-content: center; align-items: center; min-height: 100vh; }
+              .container { max-width: 100%; max-height: 100%; text-align: center; }
+              img { max-width: 100%; max-height: 80vh; border-radius: 5px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
+              h1 { color: #333; font-size: 20px; margin-bottom: 20px; }
+            </style>
+          </head>
+          <body>
+            <div class="container">
+              <h1>${fileName}</h1>
+              <img src="${imageUrl}" alt="${fileName}">
+            </div>
+          </body>
+        </html>
+      `);
+      previewWindow.document.close();
+      
+      // 清理URL对象
+      previewWindow.onunload = function() {
+        URL.revokeObjectURL(imageUrl);
+      };
     },
-    // 下载文件
+    
+    // 预览PDF文件
+    previewPdfFile(blob, fileName) {
+      // 创建PDF URL
+      const pdfUrl = URL.createObjectURL(blob);
+      
+      // 创建预览窗口
+      const previewWindow = window.open('', '_blank', 'width=800,height=600');
+      previewWindow.document.write(`
+        <html>
+          <head>
+            <title>${fileName} - 预览</title>
+            <style>
+              body { margin: 0; padding: 0; height: 100vh; overflow: hidden; }
+              iframe { width: 100%; height: 100%; border: none; }
+            </style>
+          </head>
+          <body>
+            <iframe src="${pdfUrl}"></iframe>
+          </body>
+        </html>
+      `);
+      previewWindow.document.close();
+      
+      // 清理URL对象
+      previewWindow.onunload = function() {
+        URL.revokeObjectURL(pdfUrl);
+      };
+    },
+    // 下载文件 - 使用XMLHttpRequest处理二进制响应
     downloadFile(row) {
-      // 使用导入的API函数进行文件下载
-      downloadFile(row.id).then(response => {
-        // 获取文件名，如果响应头中没有则使用row.source
-        let fileName = row.source;
-        const contentDisposition = response.headers['content-disposition'];
-        if (contentDisposition && contentDisposition.indexOf('filename=') !== -1) {
-          fileName = decodeURIComponent(contentDisposition.split('filename=')[1]);
+      // 获取token
+      const token = this.$store.getters.token;
+      
+      // 构建下载URL
+      const downloadUrl = `${this.appBase}/QandA/knowledge/file/download/${row.id}`;
+      
+      // 创建XMLHttpRequest对象
+      const xhr = new XMLHttpRequest();
+      xhr.open('GET', downloadUrl, true);
+      
+      // 设置请求头
+      xhr.setRequestHeader('Authorization', `Bearer ${token}`);
+      
+      // 设置响应类型为blob
+      xhr.responseType = 'blob';
+      
+      // 请求完成处理函数
+      xhr.onload = function() {
+        if (xhr.status === 200) {
+          // 获取响应头中的文件名
+          let fileName = row.source;
+          const contentDisposition = xhr.getResponseHeader('content-disposition');
+          if (contentDisposition && contentDisposition.indexOf('filename=') !== -1) {
+            fileName = decodeURIComponent(contentDisposition.split('filename=')[1]);
+          }
+          
+          // 创建Blob对象
+          const blob = new Blob([xhr.response]);
+          
+          // 创建下载链接
+          const link = document.createElement('a');
+          link.href = URL.createObjectURL(blob);
+          link.download = fileName;
+          link.style.display = 'none';
+          
+          // 添加到DOM并触发下载
+          document.body.appendChild(link);
+          link.click();
+          
+          // 清理
+          document.body.removeChild(link);
+          URL.revokeObjectURL(link.href);
+          
+          // 显示下载成功提示
+          this.$message.success('文件下载成功');
+        } else {
+          // 显示下载失败提示
+          this.$message.error('文件下载失败，请重试');
         }
-        
-        // 创建Blob对象
-        const blob = new Blob([response.data]);
-        
-        // 创建下载链接
-        const link = document.createElement('a');
-        link.href = URL.createObjectURL(blob);
-        link.download = fileName;
-        link.style.display = 'none';
-        
-        // 添加到DOM并触发下载
-        document.body.appendChild(link);
-        link.click();
-        
-        // 清理
-        document.body.removeChild(link);
-        URL.revokeObjectURL(link.href); // 释放URL对象
-        
-        // 显示下载成功提示
-        this.$message.success('文件下载成功');
-      }).catch(error => {
-        console.error('文件下载失败:', error);
-        this.$message.error('文件下载失败，请重试');
-      });
+      }.bind(this);
+      
+      // 网络错误处理
+      xhr.onerror = function() {
+        this.$message.error('网络错误，文件下载失败');
+      }.bind(this);
+      
+      // 发送请求
+      xhr.send();
+      
+      // 显示下载开始提示
+      this.$message.success('正在下载文件...');
     }
   }
 }