CODEWITHSUNDEEP
c#dotnet-httpclient
FilipToth
FilipToth

Reputation: 157

.NET HttpClient - Measuring stream download speeds

How can I measure the download rate when copying from a stream? Here's my download code:

var client = new HttpClient();
using (var respStream = await client.GetStreamAsync(Url))
{
    using (var file = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.Write, FileShare.ReadWrite))
    {
        await CopyToAsync(respStream, file);
        file.Flush();
    }
}

PS: I'm using a custom CopyToAsync implementation, but that's not really relevant.

Upvotes: 2

Views: 220

Answers (1)

FilipToth
FilipToth

Reputation: 157

I resolved it. The answer was to create a cache where I add the bytesRead value I got out of the sourceStream.ReadAsync(...) in my custom Stream::CopyToAsync(...) implementation. Then do the standard speed calculation:

(I used a stopwatch to measure the time it took to download)

bytesPerSecond = bytesRead / watch.Elapsed.TotalSeconds

If you'd like to see the implementation of Stream::CopyToAsync(...), you can find that here: https://referencesource.microsoft.com/#mscorlib/system/io/stream.cs,08ee62b6d544c8fe

Upvotes: 2

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