流文件下载问题

使用uni.downloadFile下载视频流文件，一直没法下载，把url换成静态的又可以。

一直在改请求方面的代码，但是都不行，后来发现是服务端配置问题。

后台：

 1 @ApiOperation(value = "根据疑情Id查看视频", notes = "根据疑情Id查看视频")
 2     @PostMapping("/likeVideo")
 3     public void likeVideo(@RequestHeader Integer groupId,@RequestHeader Integer userId, DangerIdVo dangerIdVo, HttpServletResponse httpServletResponse) {
 4         Integer dangerId = dangerIdVo.getDangerId();
 5         DangerLog dangerLog=dangerLogService.selectByDangerId(groupId,dangerId,userId);
 6         if(dangerLog==null){
 7             throw new ServiceException(ServiceExceptionEnum.NOT_JWT);
 8         }
 9         String video = dangerLog.getVideo();
10         //响应文件流准备
11         File file = new File(video);
12         FileInputStream fileInputStream = null;
13         //response响应输出流
14         ServletOutputStream servletOutputStream = null;
15         //响应Http信息头准备
16         httpServletResponse.addHeader("Content-Disposition", "attachment;filename=\""+file.getName()+"\"");
17         httpServletResponse.addHeader("Content-Length",file.length()+"");
18         httpServletResponse.setContentType("application/octet-stream");
19         try{
20             //输出流信息准备
21             servletOutputStream = httpServletResponse.getOutputStream();
22             //文件流准备，打开NIO流管道
23             fileInputStream = new FileInputStream(file);
24             //调用方法
25             servletOutput(fileInputStream, servletOutputStream);
26         } catch (FileNotFoundException e) {
27             throw new ServiceException(ServiceExceptionEnum.NOT_VEDIO);
28         }catch (Exception e){
29             System.out.println("servletOutputStream异常！");
30         }finally{
31             try {
32                 servletOutputStream.close();
33                 fileInputStream.close();
34             } catch (IOException e) {
35                 System.out.println("文件流关闭异常！");
36             }
37         }
38     }

前端:

  1 uni.showModal({
  2 
  3     title: "提示",
  4 
  5     content: "是否下载该视频",
  6 
  7     showCancel: true,
  8 
  9     cancelText: '取消',
 10 
 11     confirmText: '下载',
 12 
 13     success: res = >{
 14 
 15         if (res.confirm) {
 16 
 17             //用户点击确定
 18             constdownloadTask = uni.downloadFile({
 19 
 20                 url: encodeURI(`$ {
 21                     apiUrl
 22                 }` +
 23 
 24                 '/api/downvideo-web/downVideo/likeVideo?dangerId=14081' +
 25 
 26                 '&&groupId=' + header().groupId + '&&userId=' + header().userId
 27 
 28                 ),
 29 
 30                 header: header(),
 31 
 32                 success: (data) = >{
 33 
 34                     if (data.statusCode === 200) {
 35 
 36                         uni.saveImageToPhotosAlbum({ //需要保存到相册如果是下载文件用uni.saveFile()
 37                             filePath: data.tempFilePath,
 38                             //视频的本地临时地址
 39                             success: function(res) {
 40 
 41                                 console.log('下载成功')
 42 
 43                                 uni.showToast({
 44 
 45                                     title: '下载完成,请到相册查看',
 46 
 47                                     position: 'center',
 48 
 49                                     icon: 'none',
 50 
 51                                     duration: 2000
 52 
 53                                 });
 54 
 55                             },
 56 
 57                             fail: () = >{
 58 
 59                                 uni.showToast({
 60 
 61                                     title: '下载视频失败请重试',
 62 
 63                                     position: 'center',
 64 
 65                                     icon: 'none',
 66 
 67                                     duration: 2000
 68 
 69                                 });
 70 
 71                             }
 72 
 73                         });
 74 
 75                     }
 76 
 77                 },
 78 
 79                 fail: (err) = >{
 80 
 81                     uni.hideLoading()
 82 
 83                     uni.showToast({
 84 
 85                         title: err,
 86 
 87                         position: 'center',
 88 
 89                         icon: 'none',
 90 
 91                         duration: 2000
 92 
 93                     });
 94 
 95                 },
 96 
 97                 complete: () = >{}
 98 
 99             });
100 
101             downloadTask.onProgressUpdate((res) = >{ //下载进度
102                 console.log('进度=' + res.progress)
103 
104             });
105 
106         }
107 
108     }
109 
110 })
View Code

 

posted @ 2021-06-23 12:00  xencc  阅读(240)  评论(0)    收藏  举报