假设将this作为要上传的代码。
// File or Blob named mountains.jpg
var file = ...
// Create the file metadata
var metadata = {
contentType: 'image/jpeg'
};
// Upload file and metadata to the object 'images/mountains.jpg'
var uploadTask = storageRef.child('images/' + file.name).put(file, metadata);
// Listen for state changes, errors, and completion of the upload.
uploadTask.on(firebase.storage.TaskEvent.STATE_CHANGED, // or 'state_changed'
function(snapshot) {
// Get task progress, including the number of bytes uploaded and the total number of bytes to be uploaded
var progress = (snapshot.bytesTransferred / snapshot.totalBytes) * 100;
console.log('Upload is ' + progress + '% done');
switch (snapshot.state) {
case firebase.storage.TaskState.PAUSED: // or 'paused'
console.log('Upload is paused');
break;
case firebase.storage.TaskState.RUNNING: // or 'running'
console.log('Upload is running');
break;
}
}, function(error) {
// A full list of error codes is available at
// https://firebase.google.com/docs/storage/web/handle-errors
switch (error.code) {
case 'storage/unauthorized':
// User doesn't have permission to access the object
break;
case 'storage/canceled':
// User canceled the upload
break;
...
case 'storage/unknown':
// Unknown error occurred, inspect error.serverResponse
break;
}
}, function() {
// Upload completed successfully, now we can get the download URL
uploadTask.snapshot.ref.getDownloadURL().then(function(downloadURL) {
console.log('File available at', downloadURL);
});
});
在以下情况下如何指示进度（使用控制台）
您的用户的互联网连接速度缓慢（<50kb / s）
上传小文件（<.5mb）
'state_changed'事件似乎为250kb的进度块触发。在官方docs中找不到与此相关的任何内容。
我可以以某种方式减小块大小或每秒进行定期更新吗？
任何其他解决方法都受到高度赞赏。
P.S .：每个用户的连接都会有所不同，我不会假设50kb / s，而只是根据假设显示静态进度。