public static async Task <bool> DownloadAsync(string url, string id, string format, Pixiv p, Func <long, long, Task> ProgressCallback)
{
//一次只能更新一张插画，在当前下载任务完成前忽略新的下载请求
if (!downloading)
{
downloading = true;
}
else
{
return(false);
}
if (await ApplicationData.Current.LocalFolder.TryGetItemAsync(id + '.' + format) == null)
{
try
{
StorageFolder folder = await ApplicationData.Current.LocalFolder.GetFolderAsync("illusts");
StorageFile file = await folder.CreateFileAsync(id + '.' + format, CreationCollisionOption.ReplaceExisting);
var message = await new PixivAppAPI(p.baseAPI).RequestCall("GET", url, new Dictionary <string, string>()
{
{ "Referer", "https://app-api.pixiv.net/" }
});
long length = message.Content.Headers.ContentLength ?? -1;
using (var resStream = await message.Content.ReadAsStreamAsync())
{
using (Stream fStream = await file.OpenStreamForWriteAsync())
{
var bytesCounter = 0L;
int bytesRead;
byte[] buffer = new byte[4096];
while ((bytesRead = await resStream.ReadAsync(buffer, 0, 4096)) != 0)
{
bytesCounter += bytesRead;
await fStream.WriteAsync(buffer, 0, bytesRead);
_ = ProgressCallback(bytesCounter, length);
}
}
}
}
catch (Exception e)
{
Console.WriteLine(e);
downloading = false;
return(false);
}
}
downloading = false;
return(true);
}