个别用户电脑上传某些格式视频无法预览/播放

标签：audio 预览 text image application video file 播放 上传

场景：某些电脑用户上传同一视频，却发现无法预览/播放该视频，如mov/f4v/vob/rm/rmvb...等格式

原因：使用同一个文件上传出现通过获取到的file对象type属性为""，系统中所安装的Microsoft Excel软件或注册表的原因，不常见的文件扩展名会返回空字符串，最好不要依靠这个type属性作为唯一的验证方案

方法：用file.type做匹配同时用file.name，把常见的type文件后缀name做个配对

var fileTypeList = { 
  docx:"application/vnd.openxmlformats-officedocument.wordprocessingml.document",
  doc:"application/msword",
  pdf:"application/pdf",
  rtf:"application/rtf",
  xls:"application/vnd.ms-excel",
  xlsx:"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
  ppt:"application/vnd.ms-powerpoint",
  pptx:"application/vnd.openxmlformats-officedocument.presentationml.presentation",
  rar:"application/x-rar-compressed",
  swf:"application/x-shockwave-flash",
  zip:"application/zip",
  mid:"audio/midi",
  midi:"audio/midi",
  kar:"audio/midi",
  mp3:"audio/mpeg",
  ogg:"audio/ogg",
  m4a:"audio/x-m4a",
  ra:"audio/x-realaudio",
  gif:"image/gif",
  jpeg:"image/jpeg",
  jpg:"image/jpeg",
  png:"image/png",
  tif:"image/tiff",
  tiff:"image/tiff",
  wbmp:"image/vnd.wap.wbmp",
  ico:"image/x-icon",
  jng:"image/x-jng",
  bmp:"image/x-ms-bmp",
  svg:"image/svg+xml",
  svgz:"image/svg+xml",
  webp:"image/webp",
  css:"text/css",
  html:"text/html",
  htm:"text/html",
  shtml:"text/html",
  txt:"text/plain",
  css:"text/css",
  xml:"text/xml",
  "3gpp":"video/3gpp",
  "3gp":"video/3gpp",
  mp4:"video/mp4",
  mpeg:"video/mpeg",
  mpg:"video/mpeg",
  mov:"video/quicktime",
  webm:"video/webm",
  flv:"video/x-flv",
  m4v:"video/x-m4v",
  wmv:"video/x-ms-wmv",
  avi:"video/x-msvideo",
}

　　

export function fileTypeFormat(file){
  return file.type || fileTypeList[file.name.substring(file.name.lastIndexOf('.') + 1)]
}

　　

相关文档解析见https://blog.csdn.net/wuhuama_/article/details/118699195

标签：audio,预览,text,image,application,video,file,播放,上传
From： https://www.cnblogs.com/taojiejun/p/17104336.html