private static async Task <List <FileRecord> > ReadStreamToRecords(CloudAppendBlob blob)
{
List <FileRecord> records = new List <FileRecord>();
using (var s = new MemoryStream())
{
if (!await blob.ExistsAsync())
{
return(records);
}
await blob.DownloadRangeToStreamAsync(s, 0, blob.Properties.Length);
s.Position = 0;
var reader = new BinaryReader(s);
var record = new FileRecord();
while (record.ReadContentFromStream(reader))
{
records.Add(record);
record = new FileRecord();
}
}
return(records);
}
/// <summary>
/// Gets all records from a starting file pointer
/// </summary>
/// <param name="pointer">Byte position inside the file to start downloading from.</param>
/// <returns></returns>
private async Task <IEnumerable <RecordContainer> > GetAllFromPointerAsync(long pointer)
{
if (!await file.ExistsAsync())
{
return(new List <RecordContainer>());
}
if ((await GetFileSize()) <= pointer)
{
return(new List <RecordContainer>());
}
using (MemoryStream ms = new MemoryStream())
{
await file.DownloadRangeToStreamAsync(ms, pointer, null);
ms.Position = 0;
return(ParseRecordStream(ms));
}
}
