private void DownloadFile(HttpListenerContext ctx)
{
Byte[] emptyBuffer = new Byte[0];
String fileIdUrl = ctx.Request.RawUrl.Replace(API_NAME, String.Empty).Trim('/');
Int64 fileId = 0L;
Int64.TryParse(fileIdUrl, out fileId);
using (BinaryWriter writer = new BinaryWriter(ctx.Response.OutputStream))
{
if (fileId == 0)
{
writer.Write(emptyBuffer, 0, 0);
}
else
{
using (BigFile bigFile = new BigFile(this.FilePath, this.FileSize))
{
Byte[] buffer = bigFile.Read(fileId) ?? emptyBuffer;
writer.Write(buffer, 0, buffer.Length);
}
}
ctx.Response.StatusCode = (Int32)HttpStatusCode.OK;
ctx.Response.Close();
writer.Close();
}
}
private static void TestRead()
{
var bigFile = new BigFile(BIG_FILE_NAME, 10737418240);
var lines = ReadMsg(BIG_FILE_NAME + ".txt");
if (!Directory.Exists("Images"))
{
Directory.CreateDirectory("Images");
}
var index = 0;
foreach (var line in lines)
{
index++;
if (string.IsNullOrEmpty(line))
{
continue;
}
var arry = line.Split(',');
var fileName = string.Format("{0}-{2}-{1}", arry[0], arry[2], Guid.NewGuid().ToString("N"));
var filePath = Path.Combine("Images", fileName);
var data = bigFile.Read(Convert.ToInt64(arry[0]));
if (data == null || data.Length == 0)
{
Console.WriteLine("{0}/{1} {2} {3} 文件不存在", index, lines.Count, filePath, line);
continue;
}
Console.WriteLine("{0}/{1} {2} {3}", index, lines.Count, filePath, line);
File.WriteAllBytes(filePath, data);
}
}