vue webuploader 文件上传组件开发

最近项目中需要用到百度的webuploader大文件的分片上传，对接后端的fastdfs，于是着手写了这个文件上传的小插件，步骤很简单，但是其中猜到的坑也不少，详细如下：

一、封装组件

引入百度提供的webuploader.js、uploader.swf

css样式就直接写在组件里面了 

<template>
 <div>
  <div id="list" class="uploader-list"></div>
  <div id="wrapper">
   <div class="uploader-container">
    <div :id="id" limitsize="1" :ext="ext"></div>
    <el-button style="margin-bottom:10px;float:left;" size="small" :loading="uploadloading" type="success" @click="start">上传到服务器</el-button>
    <el-button style="margin-left: 20px;margin-bottom:10px;float:left;" :disabled="stopbtn" size="small" type="danger" @click="stop">暂停上传</el-button>
   </div>
  </div>
  <div class="el-upload__tip">{{tip}}</div>
  <div class="file-list">
   <ul class="el-upload-list el-upload-list--text">
    <li v-for="file in filelist" :class="['el-upload-list__item', 'is-' + file.status]" :key="file">
     <a class="el-upload-list__item-name">
      <i class="el-icon-document"></i>{{file.name}}
     </a>
     <label class="el-upload-list__item-status-label">
      <i :class="{'el-icon-upload-success': true,'el-icon-circle-check': listtype === 'text',
     'el-icon-check': ['picture-card', 'picture'].indexof(listtype) > -1}"></i>
     </label>
     <i class="el-icon-close" @click="removefile(file)"></i>
     <el-progress
      v-if="file.status === 'uploading'"
      :type="listtype === 'picture-card' ? 'circle' : 'line'"
      :stroke-width="listtype === 'picture-card' ? 6 : 2"
      :percentage="file.percentage">
     </el-progress>
    </li>
   </ul>
  </div>
 </div>
</template>
<script>
 import '../js/jquery.js'
 import '../js/webuploader.js'
 import { base64 } from 'js-base64'
 import cryptojs from 'crypto-js';

 export default{
  name: 'fileupload',
  props: {
   id: {
    type: string,
    default: function(){
     return "filepicker";
    }
   },
   //上传提示
   tip: {
    type: string,
    default: function(){
     return "";
    }
   },
   //文件后缀名限制
   ext: {
    type: string,
    default: function(){
     return "jpg,jpeg,png,pdf,mp4,avi.mp3";
    }
   },
   //分片大小设置
   chunksize: {
    type: number,
    default: function(){
     return 2097152;
    }
   },
   //分片上传重试次数
   chunkretry: {
    type: number,
    default: function(){
     return 1;
    }
   },
   //是否自动上传
   auto: {
    type: boolean,
    default: function(){
     return false;
    }
   },
   //上传文件大小限制
   sizelimit: {
    type: number,
    default: function(){
     return 209715200;
    }
   },
   //上传文件数量限制
   countlimit: {
    type: number,
    default: function(){
     return 5;
    }
   }
  },
  data(){
   return{
    appid: appconfig.appid,
    securitykey: appconfig.securitykey,
    checkurl: appconfig.checkurl,
    uploadurl: appconfig.uploadurl,
    mergeurl: appconfig.mergeurl,
    previewname: '选择文件',
    wul_filemd5: '',
    wul_size: 0,
    wul_filename: '',
    wul_chunk: 0,
    wul_uploader: '',
    filelist: [],
    listtype: 'text',
    percentage: 0,
    fileobject: {
     uid: '',
     name: '',
     ext: '',
     type: '',
     status: '',
     percentage: 0,
     url: ''
    },
    uploadloading: false,
    stopbtn: true
   }
  },
  methods: {
   /**
    * 获取当前上传列表中的文件
    * @returns {array|*}
    */
   getfilelist: function(){
    return this.filelist;
   },
   //绑定事件
   wul_init: function() {
    //提示只能选择一个文件
    this.wul_uploader.on('filesqueued', function (files) {
     if (files.length > 1) {
      this.$message({
       message: '请选择一张图片',
       type: 'error'
      });
      for (var i = 0; i < files.length; i++) {
       this.wul_uploader.cancelfile(files[i]);
      }
      this.wul_uploader.reset();
      this.wul_filemd5 = "";
      this.wul_size = 0;
      this.wul_filename = "";
      this.wul_chunk = 0;  //当前切片数
     }else{
      if( this.filelist.length == this.countlimit ){
       this.$message({
        message: '已经达到上传文件限制数量',
        type: 'error'
       });
      }else{
       //此时往需要上传的文件列表中添加文件
       let file = {
        uid: date.now() + this.tempindex++,
        name: files[0].name,
        type: files[0].type,
        ext: files[0].ext,
        status: "ready",
        percentage: 0
       }
       this.fileobject = file;
       this.filelist.push(this.fileobject);
      }
     }
    }.bind(this));

    //文件校验格式和大小
    this.wul_uploader.on('error', function (type) {
      debugger
     if (type == 'q_exceed_size_limit') {
      this.$message({
       message: '文件超过指定大小',
       type: 'error'
      });
     }
     if (type == 'q_type_denied') {
      this.$message({
       message: '文件格式错误，请选择文件',
       type: 'error'
      });
     }
     if (type == 'f_exceed_size') {
      this.$message({
       message: "文件超过" + this.sizelimit / 1024 / 1024 + "m",
       type: 'error'
      });
     }
    }.bind(this));

    //上传进度
    this.wul_uploader.on('uploadprogress', function (file, percentage) {
     this.percentage = percentage * 100;
     this.fileobject.status = "uploading";
     this.fileobject.percentage = this.percentage;
     console.log(this.fileobject.percentage);
    }.bind(this));

    //每次切片上传完成之后的判断
    this.wul_uploader.on('uploadaccept', function (object, ret) {
     if (ret.responsecode != 0) {
      this.wul_uploader.cancelfile(this.wul_uploader.getfiles()[0].id);
     }
    });

    this.wul_uploader.on('uploadbeforesend', function(object, data, headers) {
     console.log(data);
    });
   },

   option: function(key, val) {
    this.wul_uploader.option(key, val);
    var options = this.wul_uploader.options;
    this.wul_uploader.destroy();  //注销uploader
    this.wul_uploader = webuploader.create(options);
    this.wul_init();
   },
   start: function(){
    if(this.wul_uploader.getfiles()[0] != null) {
     this.wul_uploader.upload(this.wul_uploader.getfiles()[0].id);
     this.uploadloading = true;
     this.stopbtn = false;
    } else {
     this.$message({
      message: "请选择上传文件",
      type: 'error'
     });
    }
   },
   stop: function(){
    this.wul_uploader.cancelfile(this.wul_uploader.getfiles()[0].id);
   },
   removefile: function(file){
    this.filelist.splice(this.filelist.indexof(file), 1);
   },
   change: function(){
    this.option('accept', {
     title: 'images',
     extensions: 'gif,jpg,jpeg,bmp,png'
    });
   }
  },
  mounted(){
   webuploader.uploader.register({
    "before-send-file": "beforesendfile",
    "before-send": "beforesend",
    "after-send-file": "aftersendfile",
   }, {
    beforesendfile: function (file) {
     var deferred = webuploader.deferred();
     this.wul_uploader.md5file(file).then(function (val) {
      this.wul_filemd5 = val;
      this.wul_size = file.size;
      this.wul_filename = file.name;
      var timestamp = date.parse(new date()) / 1000;
      var signparam = "{chunksize=" + this.chunksize + ", filemd5=" + this.wul_filemd5 + ", size=" + this.wul_size + ", timestamp=" + timestamp + "}";
      var sign = base64.encode(cryptojs.hmacsha1(signparam, this.securitykey));
      // 获取断点续传位置
      jquery.ajax({
       type: "post",
       // 测试
       url: this.checkurl,
       data: {
        // 文件大小
        size: this.wul_size,
        // 文件唯一标记
        filemd5: this.wul_filemd5,
        // 切片大小
        chunksize: this.chunksize,
        // 签名
        sign: sign,
        // 应用分配id
        appid: this.appid,
        // 当前时间戳
        timestamp: timestamp

       },
       datatype: "json",
       // 上传失败
       error: function (xmlhttprequest, textstatus, errorthrown) {
        this.$message({
         message: "上传失败...",
         type: 'error'
        });
        this.uploadloading = false;
        this.stopbtn = true;
       }.bind(this),
       success: function (response) {
        if (response.responsecode == 0) { // 切片获取成功
         this.wul_chunk = response.chunk;
         deferred.resolve();
        } else { // 切片获取失败,请求成功
         this.wul_uploader.cancelfile(file);  //取消文件上传
         this.$message({
          message: "切片检查失败,请联系管理员",
          type: 'error'
         });
         deferred.resolve();
         this.uploadloading = false;
         this.stopbtn = true;
        }
       }.bind(this)
      });
      return deferred.promise();
     }.bind(this));
     return deferred.promise();
    }.bind(this),
    beforesend: function (block) {
     var deferred = webuploader.deferred();
     if (block.chunk < this.wul_chunk) {
      return deferred.reject();
     }
     this.wul_uploader.md5file(block.blob).then(function (chunkmd5) {
      var timestamp = date.parse(new date()) / 1000;
      var signparam = '{chunk=' + block.chunk + ', chunkmd5=' + chunkmd5 + ', chunksize=' + this.chunksize + ', filemd5=' + this.wul_filemd5 + ', size=' + this.wul_size + ', timestamp=' + timestamp + '}';
      var signtemp = cryptojs.hmacsha1(signparam, this.securitykey);
      var sign = base64.encode(signtemp);  //获取sign值
      this.wul_uploader.options.formdata = {
       'timestamp': timestamp,
       'appid': this.appid,
       'chunk': block.chunk,
       'chunksize': this.chunksize,
       'filemd5': this.wul_filemd5,
       'chunkmd5': chunkmd5,
       'size': this.wul_size,
       'sign': sign
      };
      deferred.resolve();
     }.bind(this))
     return deferred.promise();
    }.bind(this),
    aftersendfile: function (file) {
     var timestamp = date.parse(new date()) / 1000;
     var signparam = "{chunksize=" + this.chunksize + ", filemd5=" + this.wul_filemd5 + ", filename=" + file.name + ", size=" + this.wul_size + ", timestamp=" + timestamp + "}";
     var sign = base64.encode(cryptojs.hmacsha1(signparam, this.securitykey));
     // 如果分块上传成功，则通知后台合并分块
     jquery.ajax({
      type: "post",
      url: this.mergeurl,
      data: {
       appid: this.appid,
       filemd5: this.wul_filemd5,
       filename: file.name,
       chunksize: this.chunksize,
       sign: sign,
       size: this.wul_size,
       timestamp: timestamp
      },
      success: function (response) {
       if (response.responsecode == 0) {
        this.fileobject.status = "success";
        this.fileobject.percentage = 100;
        this.fileobject.url = response.filepath;
       } else {
        this.fileobject.status = "exception";
        this.$message({
         message: "上传失败,失败原因:" + response.responsemsg,
         type: 'error'
        });
       }
       this.uploadloading = false;
       this.stopbtn = true;
       this.wul_uploader.reset();
       this.wul_filemd5 = "";
       this.wul_size = 0;
       this.wul_filename = "";
       this.wul_chunk = 0;  //当前切片数
      }.bind(this)
     });
    }.bind(this)
   });
   this.wul_uploader = webuploader.create({
    // swf文件路径
    swf: '../js/uploader.swf',
    // 文件接收服务端。
    server: this.uploadurl,
    // 定义选择按钮
    pick: {
     "id": "#" + this.id,
     "innerhtml": this.previewname
    },
    // 自动上传
    auto: this.auto,
    // 禁止浏览器打开文件
    disableglobaldnd: true,
    // 添加截图功能
    paste: '#wrapper',
    // 定义拖动面板
    dnd: '#wrapper',
    // 分片上传
    chunked: true,
    // 分片大小为2m
    chunksize: this.chunksize,
    // 分片上传失败重试次数
    chunkretry: this.chunkretry,
    // 图片不做压缩
    compress: false,
    // 队列设置10个,为了选择多个文件的时候能提示
    filenumlimit: 10,
    // 提前准备好下一个文件
    preparenextfile: true,
    // 限制单个文件大小
    filesinglesizelimit: this.sizelimit,
    //线程数
    threads : 1,
    // 限制格式
    accept: {
     title: "access",
     extensions: this.ext
    }
   });
   this.wul_init();
  }
 }
</script>
<style>
 /* ----------------reset css--------------------- */
 html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre,
 a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp,
 small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li,
 fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td,
 article, aside, canvas, details, figcaption, figure, footer, header, hgroup, menu, nav, section, summary,
 time, mark, audio, video, input {
  margin: 0;
  padding: 0;
  border: none;
  outline: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
 }

 html, body, form, fieldset, p, div, h1, h2, h3, h4, h5, h6 {
  -webkit-text-size-adjust: none;
 }

 article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section {
  display: block;
 }

 body {
  font-family: arial, sans-serif;
 }

 ol, ul {
  list-style: none;
 }

 blockquote, q {
  quotes: none;
 }

 blockquote:before, blockquote:after, q:before, q:after {
  content: '';
  content: none;
 }

 ins {
  text-decoration: none;
 }

 del {
  text-decoration: line-through;
 }

 table {
  border-collapse: collapse;
  border-spacing: 0;
 }

 /* ------------ */
 #wrapper {
  width: 100%;
  margin: 0 auto;
  height: 35px;
 }

 .img-preview {
  width: 160px;
  height: 90px;
  margin-top: 1em;
  border: 1px solid #ccc;
 }

 .cropper-wraper {
  position: relative;
 }

 .upload-btn {
  background: #ffffff;
  border: 1px solid #cfcfcf;
  color: #565656;
  padding: 10px 18px;
  display: inline-block;
  border-radius: 3px;
  margin-left: 10px;
  cursor: pointer;
  font-size: 14px;

  position: absolute;
  right: 1em;
  bottom: 2em;
 }
 .upload-btn:hover {
  background: #f0f0f0;
 }
 .uploader-container{
  width: 100%;
  font-size: 10px;
 }

 .webuploader-container {
  position: relative;
  width: 100px;
  height: 21px;
  float: left;
 }
 .webuploader-element-invisible {
  position: absolute !important;
  clip: rect(1px 1px 1px 1px); /* ie6, ie7 */
  clip: rect(1px,1px,1px,1px);
 }
 .webuploader-pick {
  position: relative;
  display: inline-block;
  cursor: pointer;
  background: #00b7ee;
  padding: 6px 15px;

  color: #fff;
  text-align: center;
  border-radius: 3px;
  overflow: hidden;
 }
 .webuploader-pick-hover {
  background: #00a2d4;
 }

 .webuploader-pick-disable {
  opacity: 0.6;
  pointer-events:none;
 }
 .file-list{
  width: 100%;
 }
</style> 

二、导出组件

var fileupload = require('./src/file_upload.vue');

module.exports = {
 fileupload
} 

三、demo  引用方式

<template>
 <div>
  <el-card class="box-card">
   <fileupload ref="fileupload" :ext="ext" :countlimit="5" :tip="tip">aaa</fileupload>
  </el-card>
 </div>
</template>
<script>
 import {fileupload} from '@/components/fileupload/index.js'
 export default{
  name: 'hello',
  components: {fileupload},
  data(){
   return{
    filelist: [],
    ext: 'png,jpg,jpeg,mp3,mp4,pdf',
    tip: '可上传png/jpg/jpeg/mp3/mp4/pdf，大小不超过200m'
   }
  },
  created(){

  },
  methods: {
   getfilelist: function(){
    this.filelist = this.$refs.fileupload.getfilelist();
    console.log(this.filelist);
   }
  }
 }
</script> 

四、运行效果图

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。