isolate_downloader

Description:

isolate downloader

isolate downloader #

Download multiple files at the same time.
Getting started #
Usage #
//
// set the maximum number of tasks you want to download at the same time.
// default jobCount is 4
//
final downloader = await IsolateDownloader.getInstance(jobCount: 2);

//
// wait for downloader is ready
//
while (!downloader.isReady()) {
await Future.delayed(const Duration(milliseconds: 100));
}

//
// create task
//
final task = DownloadTask.create(
taskId: 0,
url: 'http://212.183.159.230/512MB.zip',
downloadPath: 'large.file',
);

//
// download callbacks
// if you don't want it, you don't have to set it.
//
bool isComplete = false;
late double totalSize = 0;
double downloadSize = 0;

task.sizeCallback = (sz) => totalSize = sz;
task.downloadCallback = (sz) {
downloadSize += sz;
print(
'[${(downloadSize / totalSize * 100).toStringAsFixed(1)}%] $downloadSize/$totalSize');
};
task.completeCallback = () => isComplete = true;

//
// append task
//
downloader.appendTask(task);

//
// wait for complete
//
while (!isComplete) {
await Future.delayed(const Duration(milliseconds: 100));
}
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You can also implement like polling rather than callback.
The implementation of polling eliminates the dependency of the downloader by the UI.
while (!isComplete) {
//
// get task status by taskid
//
print(downloader.getStatus(0).state);
print(downloader.getStatus(0).totalSize);
print(downloader.getStatus(0).countSize);
await Future.delayed(const Duration(milliseconds: 100));
}
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