aiforge/web_src/js/components/MinioUploader.vue

<template>
  <div class="dropzone-wrapper">
    <div id="dropzone" class="dropzone">
    </div>
    <p>文件处理状态：{{ status }}</p>
    <p>文件上传进度：{{ progress }}%</p>
  </div>
</template>

<script>
// import Dropzone from 'dropzone/dist/dropzone.js';
// import 'dropzone/dist/dropzone.css'
import createDropzone from '../features/dropzone.js';
import SparkMD5 from 'spark-md5';
import axios from 'axios';
import qs from 'qs';

const {
  AppSubUrl,
  StaticUrlPrefix,
  csrf
} = window.config;

export default {
  data() {
    return {
      dropzoneUploader: null,
      maxFiles: 1,
      maxFilesize: 1 * 1024 * 1024 * 1024 * 1024,
      acceptedFiles: '*/*',
      progress: 0,
      status: '等待上传',
    }
  },

  async mounted() {
    const dropzoneUploader = await createDropzone("div#dropzone", {
      url: '/todouploader',
      maxFiles: this.maxFiles,
      maxFilesize: this.maxFileSize,
      timeout: 0,
      autoQueue: false,
    })
    dropzoneUploader.on("addedfile", (file) => {
      setTimeout(() => {
        file.accepted && this.onFileAdded(file);
      }, 200);
    });
    dropzoneUploader.on("maxfilesexceeded", function(file) {
      if (this.files[0].status !== 'success') {
        alert('请等待第一个文件传输完成')
        this.removeFile(file)
        return
      }
      this.removeAllFiles();
      this.addFile(file);
    });

    this.dropzoneUploader = dropzoneUploader

  },
  methods: {
    resetStatus() {
      this.progress = 0
      this.status = ''
    },
    updateProgress(file, progress) {
      file.previewTemplate.querySelector(".dz-upload").style.width = `${progress}%`;
    },
    emitDropzoneSuccess(file) {
      file.status = "success";
      this.dropzoneUploader.emit("success", file);
      this.dropzoneUploader.emit("complete", file);
    },
    onFileAdded(file) {
      file.datasetId = document.getElementById("datasetId").getAttribute("datasetId");
      this.resetStatus()
      this.computeMD5(file);
    },

    finishUpload(file) {
      this.emitDropzoneSuccess(file)
      setTimeout(() => {
        window.location.reload();
      }, 1000);
    },

    computeMD5(file) {
      this.resetStatus()
      let blobSlice    = File.prototype.slice || File.prototype.mozSlice || File.prototype.webkitSlice,
          chunkSize    = 1024 * 1024 * 64,
          chunks       = Math.ceil(file.size / chunkSize),
          currentChunk = 0,
          spark        = new SparkMD5.ArrayBuffer(),
          fileReader   = new FileReader();
      let time = new Date().getTime();
      // console.log('计算MD5...')
      this.status = '计算MD5';
      file.totalChunkCounts = chunks;
      loadNext();

      fileReader.onload = (e) => {
        fileLoaded.call(this, e)
      };
      fileReader.onerror = (err) => {
        console.warn('oops, something went wrong.', err);
        file.cancel();
      };

      function fileLoaded(e){
        spark.append(e.target.result); // Append array buffer
        currentChunk++;
        if (currentChunk < chunks) {
          // console.log(`第${currentChunk}分片解析完成, 开始第${currentChunk +1}/${chunks}分片解析`);
          this.status = `加载文件 ${(currentChunk/chunks*100).toFixed(2)}% (${currentChunk}/${chunks})`;
          this.updateProgress(file, (currentChunk/chunks*100).toFixed(2))
          loadNext();
          return
        }

        let md5 = spark.end();
        console.log(
          `MD5计算完成：${file.name} \nMD5：${md5} \n分片：${chunks} 大小:${file.size} 用时：${(new Date().getTime() - time)/1000} s`
        );
        spark.destroy(); //释放缓存
        file.uniqueIdentifier = md5; //将文件md5赋值给文件唯一标识
        file.cmd5 = false; //取消计算md5状态
        this.computeMD5Success(file);
      }

      function loadNext() {
        let start = currentChunk * chunkSize;
        let end = ((start + chunkSize) >= file.size) ? file.size : start + chunkSize;
        fileReader.readAsArrayBuffer(blobSlice.call(file, start, end));
      }
    },

    async computeMD5Success(md5edFile) {
      const file = await this.getSuccessChunks(md5edFile);
      if (file.uploadID == "" || file.uuid == "") { //未上传过
        await this.newMultiUpload(file);
        if (file.uploadID != "" && file.uuid != "") {
          file.chunks = "";
          this.multipartUpload(file);
        } else {
          //失败如何处理
          return;
        }
        return
      }

      if (file.uploaded == "1") { //已上传成功
        //秒传
        if (file.attachID == "0") { //删除数据集记录，未删除文件
          await addAttachment(file);
        }
        console.log("文件已上传完成");
        this.progress = 100;
        this.status = '上传完成';
        this.finishUpload(file)
      } else {
        //断点续传
        this.multipartUpload(file);
      }


      async function addAttachment(file) {
        return await axios.post('/attachments/add', qs.stringify({
            uuid: file.uuid,
            file_name: file.name,
            size: file.size,
            dataset_id: file.datasetId,
            _csrf: csrf
          }))
      }
    },

    async getSuccessChunks(file) {
      const params = {
          params: {
            md5: file.uniqueIdentifier,
            _csrf: csrf
          }
        }
      try {
        const response = await axios.get('/attachments/get_chunks', params)
        file.uploadID = response.data.uploadID;
        file.uuid = response.data.uuid;
        file.uploaded = response.data.uploaded;
        file.chunks = response.data.chunks;
        file.attachID = response.data.attachID;
        return file
      } catch(error) {
        console.log("getSuccessChunks catch: ", error);
        return null
      }
    },

    async newMultiUpload(file) {
      const res = await axios.get('/attachments/new_multipart', {
          params: {
            totalChunkCounts: file.totalChunkCounts,
            md5: file.uniqueIdentifier,
            size: file.size,
            fileType: file.fileType,
            _csrf: csrf
          }
        })
      file.uploadID = res.data.uploadID;
      file.uuid = res.data.uuid;
    },

    multipartUpload(file) {
      let blobSlice    = File.prototype.slice || File.prototype.mozSlice || File.prototype.webkitSlice,
          chunkSize    = 1024 * 1024 * 64,
          chunks       = Math.ceil(file.size / chunkSize),
          currentChunk = 0,
          fileReader   = new FileReader(),
          time         = new Date().getTime();

      function loadNext() {
        let start = currentChunk * chunkSize;
        let end = ((start + chunkSize) >= file.size) ? file.size : start + chunkSize;
        fileReader.readAsArrayBuffer(blobSlice.call(file, start, end));
      }

      function checkSuccessChunks() {
        var index = successChunks.indexOf((currentChunk + 1).toString())
        if (index == -1) {
          return false;
        }
        return true;
      }

      async function getUploadChunkUrl(currentChunk, partSize) {
        const res = await axios.get('/attachments/get_multipart_url', {
            params: {
              uuid: file.uuid,
              uploadID: file.uploadID,
              size: partSize,
              chunkNumber: currentChunk + 1,
              _csrf: csrf
            }
          })
        console.log("getUploadChunkUrl: ", res)
        urls[currentChunk] = res.data.url
      }

      async function uploadMinio(url, e) {
        const res = await axios.put(url, e.target.result)
        etags[currentChunk] = res.headers.etag;
      }

      async function updateChunk(currentChunk) {
        await axios.post('/attachments/update_chunk', qs.stringify({
            uuid: file.uuid,
            chunkNumber: currentChunk + 1,
            etag: etags[currentChunk],
            _csrf: csrf
          }))
      }
      async function uploadChunk(e) {
        if (!checkSuccessChunks()) {
          let start = currentChunk * chunkSize;
          let partSize = ((start + chunkSize) >= file.size) ? file.size - start : chunkSize;
          //获取分片上传url
          await getUploadChunkUrl(currentChunk, partSize);
          if (urls[currentChunk] != "") {
            //上传到minio
            await uploadMinio(urls[currentChunk], e);
            if (etags[currentChunk] != "") {
              //更新数据库：分片上传结果
              await updateChunk(currentChunk);
            } else {
              return;
            }
          } else {
            return;
          }
        }
      };

      async function completeUpload() {
        return await axios.post('/attachments/complete_multipart', qs.stringify({
            uuid: file.uuid,
            uploadID: file.uploadID,
            file_name: file.name,
            size: file.size,
            dataset_id: file.datasetId,
            _csrf: csrf
          }))
      }

      var successChunks = new Array();
      var successParts = new Array();
      successParts = file.chunks.split(",");
      for (let i = 0; i < successParts.length; i++) {
        successChunks[i] = successParts[i].split("-")[0].split("\"")[1];
      }
      var urls = new Array();
      var etags = new Array();
      console.log('上传分片...');
      this.status = '上传中'
      loadNext();
      fileReader.onload = async (e) => {
        await uploadChunk(e);
        currentChunk++;
        if (currentChunk < chunks) {
          console.log(`第${currentChunk}个分片上传完成, 开始第${currentChunk +1}/${chunks}个分片上传`);
          this.progress = Math.ceil((currentChunk / chunks) * 100);
          this.updateProgress(file, (currentChunk/chunks*100).toFixed(2))
          await loadNext();
        } else {
          await completeUpload();
          console.log(`文件上传完成：${file.name} \n分片：${chunks} 大小:${file.size} 用时：${(new Date().getTime() - time)/1000} s`);
          this.progress = 100;
          this.status = '上传完成';
          this.finishUpload(file)
        }
      };
    },

  }
}
</script>

<style>
.dropzone-wrapper {
  margin: 2em auto ;
}
.ui .dropzone {
    border: 2px dashed #0087f5;
    box-shadow: none !important;
    padding: 0;
    min-height: 5rem;
    border-radius: 4px;
}
</style>