public static async Task <bool> DownloadFile(Uri uri, string destPath)
{
bool result;
using (HttpClientHandler handler = new HttpClientHandler())
{
handler.AllowAutoRedirect = true;
handler.AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip;
using (HttpClient client = new HttpClient(handler))
{
// Set Timeout
client.Timeout = TimeSpan.FromSeconds(3);
// Download file from uri
using (FileStream fs = new FileStream(destPath, FileMode.Create, FileAccess.Write))
{
HttpClientDownloader downloader = new HttpClientDownloader(client, uri, fs);
try
{
await downloader.DownloadAsync();
result = true;
}
catch (HttpRequestException)
{
result = false;
}
}
}
}
return(result);
}
/// <summary>
/// Download a file with HttpClient.
/// </summary>
/// <returns>true in case of success.</returns>
public async Task <Report> Download(string url, string destPath, CancellationToken?cancelToken = null)
{
Uri uri = new Uri(url);
bool result;
HttpStatusCode statusCode;
string errorMsg = null;
using (HttpClientHandler handler = new HttpClientHandler())
{
handler.AllowAutoRedirect = true;
handler.AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip;
using (HttpClient client = new HttpClient(handler))
{
// Set Timeout
client.Timeout = TimeSpan.FromSeconds(_timeOut);
// User Agent
client.DefaultRequestHeaders.UserAgent.ParseAdd(_userAgent);
// Referrer
if (_referer != null)
{
Uri refererUri = new Uri(_referer);
client.DefaultRequestHeaders.Referrer = refererUri;
}
// Progress Report
Progress <(long Position, long ContentLength, TimeSpan Elapsed)> progress = null;
if (_m != null)
{
progress = new Progress <(long, long, TimeSpan)>(x =>
{
(long position, long contentLength, TimeSpan t) = x;
string elapsedStr = $"Elapsed Time: {(int)t.TotalHours}h {t.Minutes}m {t.Seconds}s";
if (0 < contentLength)
{ // Server returned proper content length.
Debug.Assert(position <= contentLength);
double percent = position * 100.0 / contentLength;
_m.BuildCommandProgressValue = percent;
string receivedStr = $"Received : {NumberHelper.ByteSizeToSIUnit(position, 1)} ({percent:0.0}%)";
int totalSec = (int)t.TotalSeconds;
string total = NumberHelper.ByteSizeToSIUnit(contentLength, 1);
if (totalSec == 0)
{
_m.BuildCommandProgressText = $"{url}\r\nTotal : {total}\r\n{receivedStr}\r\n{elapsedStr}";
}
else
{
long bytePerSec = position / totalSec; // Byte per sec
string speedStr = NumberHelper.ByteSizeToSIUnit(bytePerSec, 1) + "/s"; // KB/s, MB/s, ...
// ReSharper disable once PossibleLossOfFraction
TimeSpan r = TimeSpan.FromSeconds((contentLength - position) / bytePerSec);
string remainStr = $"Remaining Time : {(int)r.TotalHours}h {r.Minutes}m {r.Seconds}s";
_m.BuildCommandProgressText = $"{url}\r\nTotal : {total}\r\n{receivedStr}\r\nSpeed : {speedStr}\r\n{elapsedStr}\r\n{remainStr}";
}
}
else
{ // Ex) Response do not have content length info. Ex) Google Drive
if (!_m.BuildCommandProgressIndeterminate)
{
_m.BuildCommandProgressIndeterminate = true;
}
string receivedStr = $"Received : {NumberHelper.ByteSizeToSIUnit(position, 1)}";
int totalSec = (int)t.TotalSeconds;
if (totalSec == 0)
{
_m.BuildCommandProgressText = $"{url}\r\n{receivedStr}\r\n{elapsedStr}";
}
else
{
long bytePerSec = position / totalSec; // Byte per sec
string speedStr = NumberHelper.ByteSizeToSIUnit(bytePerSec, 1) + "/s"; // KB/s, MB/s, ...
_m.BuildCommandProgressText = $"{url}\r\n{receivedStr}\r\nSpeed : {speedStr}\r\n{elapsedStr}";
}
}
});
}
// Download file from uri
using (FileStream fs = new FileStream(destPath, FileMode.Create, FileAccess.Write))
{
TimeSpan reportInterval = TimeSpan.FromSeconds(1);
HttpClientDownloader downloader = new HttpClientDownloader(client, uri, fs, progress, reportInterval, cancelToken);
try
{
await downloader.DownloadAsync();
Debug.Assert(downloader.StatusCode != null, "Successful HTTP response must have status code.");
statusCode = (HttpStatusCode)downloader.StatusCode;
result = true;
}
catch (HttpRequestException e)
{
if (downloader.StatusCode == null)
{
statusCode = 0; // Unable to send a request. Ex) Network not available
}
else
{
statusCode = (HttpStatusCode)downloader.StatusCode;
}
result = false;
errorMsg = $"[{(int)statusCode}] {e.Message}";
}
}
}
}
if (!result)
{ // Download failed, delete file
if (File.Exists(destPath))
{
File.Delete(destPath);
}
}
Debug.Assert((result && statusCode != 0) || !result, $"Inconsistent Result {result} and StatusCode {(int)statusCode}");
return(new Report(result, (int)statusCode, errorMsg));
}