/// <summary>
/// Send a file to specific http listener context with given status code.
/// </summary>
/// <param name="context"></param>
/// <param name="f"></param>
/// <param name="StatusCode"></param>
public static void SendFile(HttpListenerRoutedContext context, FileInfo f, HttpStatusCode StatusCode = HttpStatusCode.OK, string ContentType = null)
{
using (FileStream fs = f.OpenRead())
{
try
{
Trace.WriteLine(Language.Query("LWMS.Utilities.Tools00.SendFile.Access", "Access:{0}", f.FullName.Substring(GlobalConfiguration.GetWebSiteContentRoot(LWMSCoreServer.TrustedInstallerAuth).Length)));
var BUF_LENGTH = GlobalConfiguration.GetBUF_LENGTH(LWMSCoreServer.TrustedInstallerAuth);
byte[] buf = new byte[BUF_LENGTH];
if (ContentType == null)
{
context.Response.ContentType = ObtainMimeType(f.Extension);
}
else
{
context.Response.ContentType = ContentType;
}
context.Response.ContentEncoding = Encoding.UTF8;
bool EnableRange = GlobalConfiguration.GetEnableRange(LWMSCoreServer.TrustedInstallerAuth);
if (EnableRange == true)
{
context.Response.AddHeader("Accept-Ranges", "bytes");
}
else
{
context.Response.AddHeader("Accept-Ranges", "none");
}
context.Response.Headers.Remove(HttpResponseHeader.Server);
context.Response.Headers.Set(HttpResponseHeader.Server, "LWMS/" + LWMSCoreServer.ServerVersion);
string range = null;
List <Range> ranges = new List <Range>();
if (context.Request.HttpMethod == HttpMethod.Head.Method)
{
context.Response.OutputStream.Flush();
return;
}
if (EnableRange == true)
{
try
{
range = context.Request.Headers["Range"];
if (range != null)
{
range = range.Trim();
range = range.Substring(6);
var rs = range.Split(',');
foreach (var item in rs)
{
ranges.Add(Range.FromString(item));
}
}
}
catch (Exception)
{
}
}
if (ranges.Count == 0)
{
context.Response.ContentLength64 = f.Length;
context.Response.StatusCode = (int)StatusCode;
int L = 0;
while ((L = fs.Read(buf, 0, BUF_LENGTH)) != 0)
{
context.Response.OutputStream.Write(buf, 0, L);
context.Response.OutputStream.Flush();
}
}
else
{
context.Response.StatusCode = 206;
context.Response.StatusDescription = "Partial Content";
var OriginalContentType = "Content-Type: " + context.Response.ContentType;
context.Response.ContentType = "multipart/byteranges; boundary=" + Boundary;
string _Boundary = "--" + Boundary;
var NewLine = Environment.NewLine;
foreach (var item in ranges)
{
//string header = _Boundary+"\r\n"+OriginalContentType + "\r\n" + "Content-Range: bytes " + item.ToString() + "/" + fs.Length+"\r\n\r\n" ;
context.Response.Headers.Add(HttpResponseHeader.ContentRange, "bytes " + item.ToString() + "/" + fs.Length);
long length = 0;
long L = 0;
{
//Calculate length to send and left-starting index.
if (item.R == long.MinValue || item.R > fs.Length)
{
length = fs.Length - item.L;
}
else if (item.L == long.MinValue || item.L < 0)
{
length = item.R;
}
else
{
length = item.R - item.L;
}
if (item.L != long.MinValue)
{
L = item.L;
}
}
fs.Seek(L, SeekOrigin.Begin);
int _Length;
while (L < length)
{
if (length - L > BUF_LENGTH)
{
L += (_Length = fs.Read(buf, 0, BUF_LENGTH));
}
else
{
L += (_Length = fs.Read(buf, 0, (int)(length - L)));
}
context.Response.OutputStream.Write(buf, 0, _Length);
context.Response.OutputStream.Flush();
}
break;
}
context.Response.OutputStream.Flush();
}
}
catch (Exception e)
{
Trace.WriteLine(Language.Query("LWMS.Utilities.Tools00.SendFile.Failed", "Cannot send file:{0}.", e.HResult.ToString()));
}
}
}
