internal string DownloadFile(IProgressMonitor monitor, string url)
{
if (url.StartsWith("file://", StringComparison.Ordinal))
{
string tmpfile = Path.GetTempFileName();
string path = new Uri(url).LocalPath;
File.Delete(tmpfile);
File.Copy(path, tmpfile);
return(tmpfile);
}
string file = null;
FileStream fs = null;
Stream s = null;
try {
monitor.BeginTask("Requesting " + url, 2);
var task = DownloadFileRequest.DownloadFile(url, noCache: true);
task.Wait();
using (var request = task.Result) {
monitor.Step(1);
monitor.BeginTask("Downloading " + url, (int)request.ContentLength);
file = Path.GetTempFileName();
fs = new FileStream(file, FileMode.Create, FileAccess.Write);
s = request.Stream;
byte[] buffer = new byte [4096];
int n;
while ((n = s.Read(buffer, 0, buffer.Length)) != 0)
{
monitor.Step(n);
fs.Write(buffer, 0, n);
if (monitor.IsCancelRequested)
{
throw new InstallException("Installation cancelled.");
}
}
fs.Close();
s.Close();
return(file);
}
} catch {
if (fs != null)
{
fs.Close();
}
if (s != null)
{
s.Close();
}
if (file != null)
{
File.Delete(file);
}
throw;
} finally {
monitor.EndTask();
}
}
public IAsyncResult BeginDownloadSupportFile(string name, AsyncCallback cb, object state)
{
FileAsyncResult res = new FileAsyncResult();
res.AsyncState = state;
res.Callback = cb;
string cachedFile = Path.Combine(CachedFilesDir, Path.GetFileName(name));
if (File.Exists(cachedFile))
{
res.FilePath = cachedFile;
res.CompletedSynchronously = true;
res.SetDone();
return(res);
}
Uri u = new Uri(new Uri(Url), name);
if (u.Scheme == "file")
{
res.FilePath = u.AbsolutePath;
res.CompletedSynchronously = true;
res.SetDone();
return(res);
}
res.FilePath = cachedFile;
var request = DownloadFileRequest.DownloadFile(u.ToString(), false).ContinueWith(t => {
try {
using (var resp = t.Result) {
string dir = Path.GetDirectoryName(res.FilePath);
lock (this) {
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
}
if (File.Exists(res.FilePath))
{
res.SetDone();
return;
}
byte [] buffer = new byte [8092];
using (var s = resp.Stream) {
using (var f = File.OpenWrite(res.FilePath)) {
int nr = 0;
while ((nr = s.Read(buffer, 0, buffer.Length)) > 0)
{
f.Write(buffer, 0, nr);
}
}
}
res.SetDone();
}
} catch (Exception ex) {
res.Error = ex;
}
});
return(res);
}
