public async Task DownloadObjects(string streamId, List <string> objectIds, CbObjectDownloaded onObjectCallback)
{
if (objectIds.Count == 0)
{
return;
}
if (objectIds.Count < BATCH_SIZE_GET_OBJECTS)
{
await DownloadObjectsImpl(streamId, objectIds, onObjectCallback);
return;
}
List <string> crtRequest = new List <string>();
foreach (string id in objectIds)
{
if (crtRequest.Count >= BATCH_SIZE_GET_OBJECTS)
{
await DownloadObjectsImpl(streamId, crtRequest, onObjectCallback);
crtRequest = new List <string>();
}
crtRequest.Add(id);
}
await DownloadObjectsImpl(streamId, crtRequest, onObjectCallback);
}
private async Task DownloadObjectsImpl(string streamId, List <string> objectIds, CbObjectDownloaded onObjectCallback)
{
// Stopwatch sw = new Stopwatch(); sw.Start();
if (CancellationToken.IsCancellationRequested)
{
return;
}
var childrenHttpMessage = new HttpRequestMessage()
{
RequestUri = new Uri($"/api/getobjects/{streamId}", UriKind.Relative),
Method = HttpMethod.Post,
};
Dictionary <string, string> postParameters = new Dictionary <string, string>();
postParameters.Add("objects", JsonConvert.SerializeObject(objectIds));
string serializedPayload = JsonConvert.SerializeObject(postParameters);
childrenHttpMessage.Content = new StringContent(serializedPayload, Encoding.UTF8, "application/json");
childrenHttpMessage.Headers.Add("Accept", "text/plain");
HttpResponseMessage childrenHttpResponse = await Client.SendAsync(childrenHttpMessage, HttpCompletionOption.ResponseHeadersRead, CancellationToken);
childrenHttpResponse.EnsureSuccessStatusCode();
Stream childrenStream = await childrenHttpResponse.Content.ReadAsStreamAsync();
using (childrenStream)
{
using (var reader = new StreamReader(childrenStream, Encoding.UTF8))
{
while (reader.Peek() > 0)
{
if (CancellationToken.IsCancellationRequested)
{
return;
}
var line = reader.ReadLine();
var pcs = line.Split(new char[] { '\t' }, count: 2);
onObjectCallback(pcs[0], pcs[1]);
}
}
}
// Console.WriteLine($"ServerApi::DownloadObjects({objectIds.Count}) request in {sw.ElapsedMilliseconds / 1000.0} sec");
}
