使用resume .js添加哈希

Adding hashing with resumable.js

本文关键字：哈希添加 js resume 使用更新时间：2023-09-26

我试图用resumable.JS附加哈希，挂钩"fileAdded"事件。我们如何给每个数据块附加哈希值?

通过如下方式挂钩FileAdded事件

     r.on('fileAdded', function computeHashes(resumableFile, offset, fileReader) {
        //  debugger;
         // var round = resumableFile.resumableObj.getOpt('forceChunkSize') ? Math.ceil : Math.floor;
          var chunkSize = resumableFile.resumableObj.opts.chunkSize;// resumableFile.getOpt('chunkSize');
          var numChunks = Math.max(Math.floor(resumableFile.file.size / chunkSize), 1);
          var forceChunkSize = false;//resumableFile.getOpt('forceChunkSize');
          var startByte, endByte; var hasher = new SparkMD5();
          var func = (resumableFile.file.slice ? 'slice' : (resumableFile.file.mozSlice ? 'mozSlice' : (resumableFile.file.webkitSlice ? 'webkitSlice' : 'slice')));
          var bytes;
          resumableFile.hashes = resumableFile.hashes || [];
          fileReader = fileReader || new FileReader();
          offset = offset || 0;
         // if (resumableFile.resumableObj.cancelled === false) {
              startByte = offset * chunkSize;
              endByte = Math.min(resumableFile.file.size, (offset + 1) * chunkSize);
              if (resumableFile.file.size - endByte < chunkSize && !forceChunkSize) {
                  endByte = resumableFile.file.size;
              }
              bytes  = resumableFile.file[func](startByte, endByte);
              fileReader.onloadend = function (e) {
              // debugger;
               var spark = SparkMD5.ArrayBuffer.hash(e.target.result);//hasher.append(e.target.result).end();//
                  //console.log(spark);
                  resumableFile.hashes.push(spark);
                  if (numChunks > offset + 1) {
                      computeHashes(resumableFile, offset + 1, fileReader);
                  }
                  if (numChunks == offset + 1) {
                      r.upload();
                  }
                  resumableFile.resumableObj.opts.query = function (resumableFile, resumableObj) {
                     // debugger;
                      return { 'checksum': resumableFile.hashes[resumableObj] };
                  };
              };
              fileReader.readAsArrayBuffer(bytes);

          // Show progress pabr
          $('.resumable-progress, .resumable-list').show();
          // Show pause, hide resume
          $('.resumable-progress .progress-resume-link').hide();
          $('.resumable-progress .progress-pause-link').show();
          // Add the file to the list
          $('.resumable-list').append('<li class="resumable-file-' + resumableFile.uniqueIdentifier + '">Uploading <span class="resumable-file-name"></span> <span class="resumable-file-progress"></span>');
          $('.resumable-file-' + resumableFile.uniqueIdentifier + ' .resumable-file-name').html(resumableFile.fileName);
          // Actually start the upload
      });

将var query更改为

(typeof $.resumableObj.opts.query == "function") ? $.resumableObj.opts.query($.fileObj, offset) : $.resumableObj.opts.query;

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