科多瓦将文件上传到S3

Question

我正在复制相机上的文件，然后上传到S3上的Cordova应用程序(在安卓上)。目前，我将文件下载到缓存目录(我宁愿流，但我还没有想出如何做到这一点)

我可以创建一个小的测试文本文件，并上传没有问题，所以我知道这部分是可行的。它只是得到一个图像或视频文件，上传它，这是我有很大的问题，

function downloadFileToLocalStorage(fileName, url, callback){

 window.resolveLocalFileSystemURL(cordova.file.cacheDirectory, function(dir) {

var name = dir.nativeURL + fileName;
var fileTransfer = new FileTransfer();
var uri = encodeURI(url);

fileTransfer.download(
  uri, name, function (entry) {
    callback(entry);
  },
  function (error) {console.log(error);},
  false, {
    headers: {
      "Authorization": "Basic dGVzdHVzZXJuYW1lOnRlc3RwYXNzd29yZA=="
    }
  }
);

});

}

然后我读了文件然后上传

function uploadAsset(fileEntry,callback) {

 fileEntry.file(function(file) {

var reader = new FileReader();
reader.onloadend = function (evt) {
//  var theBody = btoa(evt.target._result) (8mb file);
 var theBody = this.result//  (6mb file);

  var bucket = new AWS.S3({params: {Bucket: 'video-processing'}});
  var opts = {queueSize: 2, partSize: 1024 * 1024 * 10};
  var params = {Key: file.name, ContentType: file.type, Body: theBody, opts};

  bucket.upload(params,opts, function (err, data) {
    if(data)callback(data);
  }).on('httpUploadProgress', function(evt) {
    console.log('Progress:',evt,formatBytes(evt.loaded),formatBytes(evt.total), parseInt(evt.loaded/evt.total * 100) + "%");
  });
};
reader.readAsDataURL(file);
})
}

这似乎是可行的，但也有几个问题：

• 报告的上传大小evt.total几乎是原始文件大小(4mb)的两倍，我猜想是因为我正在将它读入blob中。我应该做点别的吗？我试过直接上传读取的文件。
• 它超时之前，它似乎达到了28-30%左右，然后下降到16%，然后高达25%左右，它停留在那里一段时间，然后暂停。

这是一个跟踪的例子，通常在下降到11之前，它会上升到30-40%，然后再次上升，然后下降。非常令人沮丧！

awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 917504, totalSize: 6171107, lengthComputable: true, loaded: 917504…} 6.171 MB 6.171 MB 14%
awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 1146880, totalSize: 6171107, lengthComputable: true, loaded: 1146880…} 6.171 MB 6.171 MB 18%
awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 1359872, totalSize: 6171107, lengthComputable: true, loaded: 1359872…} 6.171 MB 6.171 MB 22%
awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 1589248, totalSize: 6171107, lengthComputable: true, loaded: 1589248…} 6.171 MB 6.171 MB 25%
awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 1818624, totalSize: 6171107, lengthComputable: true, loaded: 1818624…} 6.171 MB 6.171 MB 29%
awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 2048000, totalSize: 6171107, lengthComputable: true, loaded: 2048000…} 6.171 MB 6.171 MB 33%
awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 2277376, totalSize: 6171107, lengthComputable: true, loaded: 2277376…} 6.171 MB 6.171 MB 36%
awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 2277376, totalSize: 6171107, lengthComputable: true, loaded: 2277376…} 6.171 MB 6.171 MB 36%
awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 688128, totalSize: 6171107, lengthComputable: true, loaded: 688128…} 6.171 MB 6.171 MB 11%
awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 917504, totalSize: 6171107, lengthComputable: true, loaded: 917504…} 6.171 MB 6.171 MB 14%
awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 1146880, totalSize: 6171107, lengthComputable: true, loaded: 1146880…} 6.171 MB 6.171 MB 18%
awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 1359872, totalSize: 6171107, lengthComputable: true, loaded: 1359872…} 6.171 MB 6.171 MB 22%
awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 1359872, totalSize: 6171107, lengthComputable: true, loaded: 1359872…} 6.171 MB 6.171 MB 22%
awsController.js:43 Progress: XMLHttpRequestProgressEvent {isTrusted: true, position: 688128, totalSize: 6171107, lengthComputable: true, loaded: 688128…} 6.171 MB 6.171 MB 11%
awsController.js:38 Error: Timeout(…) 

另一个例子

Answer 1

我必须将超时设置为0，队列大小设置为1才能修复它。

 var bucket = new AWS.S3({
    apiVersion: '2006-03-01',
    httpOptions: {timeout: 0}
  });

  var params = {
    Bucket: 'bucket-name',
    Key: file.name,
    ContentEncoding: 'base64',
    ContentType: file.type,
    Body: theBody
  };

  var opts = {
    queueSize: 1,
    partSize: 1024 * 1024 * 10
  };