public async Task <byte[]> CompressAsync()
{
var resImg = SourceImageBytes;
long lastCompressedSize = 0;
//
// Check if api keys have enough compress remain count
while (ApiKeys.Any())
{
ApiKeys[0].CompressCount = await CompressRemainCountAsync(ApiKeys[0].Key);
if (ApiKeys[0].CompressRemainCount <= 1)
{
ApiKeys.RemoveAt(0);
}
else
{
break;
}
}
for (var repeatCount = 1; repeatCount <= RepeatCompressionNumber; repeatCount++)
{
using (var client = new WebClient())
{
if (!ApiKeys.Any())
{
break;
}
var auth = Convert.ToBase64String(Encoding.UTF8.GetBytes($"api:{ApiKeys[0].Key}"));
client.Headers.Add(HttpRequestHeader.Authorization, $"Basic {auth}");
do
{
await client.UploadDataTaskAsync(ApiUrl, resImg);
// Compression was successful, retrieve output from Location header.
resImg = await client.DownloadDataTaskAsync(client.ResponseHeaders["Location"]);
ApiKeys[0].CompressCount = int.Parse(client.ResponseHeaders["Compression-Count"]);
// call progress event to new compress level
OnProgressChanged(repeatCount, resImg, ApiKeys[0].CompressCount);
await ApiKeys[0].SaveCompressRemainCountAsync();
if (ApiKeys[0].CompressRemainCount <= 1)
{
ApiKeys.RemoveAt(0);
}
if (lastCompressedSize == resImg.LongLength)
{
goto EndOfCompress;
}
lastCompressedSize = resImg.LongLength;
} while (++repeatCount <= RepeatCompressionNumber && ApiKeys.Any());
}
}
EndOfCompress:
return(resImg);
}