Writing a file from HttpWebRequest periodically or after the download is complete?
I am currently using this code to download files (with Range header). Most of the files are large and it currently uses 99% of the cpu as a download file. Is there a way that the file can be written periodically so that it doesn't stay in RAM permanently?
private byte[] GetWebPageContent(string url, long start, long finish)
{
byte[] result = new byte[finish];
HttpWebRequest request;
request = WebRequest.Create(url) as HttpWebRequest;
//request.Headers.Add("Range", "bytes=" + start + "-" + finish);
request.AddRange((int)start, (int)finish);
using (WebResponse response = request.GetResponse())
{
return ReadFully(response.GetResponseStream());
}
}
public static byte[] ReadFully(Stream stream)
{
byte[] buffer = new byte[32768];
using (MemoryStream ms = new MemoryStream())
{
while (true)
{
int read = stream.Read(buffer, 0, buffer.Length);
if (read <= 0)
return ms.ToArray();
ms.Write(buffer, 0, read);
}
}
}
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1 answer
Instead of writing data to a MemoryStream (which stores data in memory), write data to a FileStream (which stores data in a file on disk).
byte[] buffer = new byte[32768];
using (FileStream fileStream = File.Create(path))
{
while (true)
{
int read = stream.Read(buffer, 0, buffer.Length);
if (read <= 0)
break;
fileStream.Write(buffer, 0, read);
}
}
Using .NET 4.0:
using (FileStream fileStream = File.Create(path))
{
stream.CopyTo(fileStream);
}
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