using Microsoft.SharePoint;
using System;
using System.Globalization;
using System.IO;
using System.Web;
namespace SPSolutions.SharePoint.Web
{
	public static class HttpUtil
	{
		public static void TransmitSPBinaryFile(string url)
		{
			SPWeb sPWeb = new SPSite(url).OpenWeb();
			SPFile sPFile = sPWeb.GetFileOrFolderObject(url) as SPFile;
			if (sPFile == null)
			{
				throw new NullReferenceException(url);
			}
			string sPFileContentType = HttpUtil.GetSPFileContentType(sPFile);
			HttpResponse response = HttpContext.Current.Response;
			response.ClearContent();
			response.ClearHeaders();
			response.AddHeader("Content-Disposition", "inline; filename=" + sPFile.Name);
			response.ContentType = sPFileContentType;
			using (Stream stream = sPFile.OpenBinaryStream())
			{
				byte[] buffer = new byte[sPFile.Length];
				stream.Read(buffer, 0, (int)sPFile.Length);
				response.BinaryWrite(buffer);
			}
			response.End();
		}
		public static string GetSPFileContentType(SPFile file)
		{
			if (file == null || string.IsNullOrEmpty(file.Name))
			{
				return "application/octet-stream";
			}
			if (string.IsNullOrEmpty(file.Name))
			{
				throw new ArgumentException("The file name is empty. Could not determine content type.");
			}
			if (file.Name.EndsWith("zip", true, CultureInfo.InvariantCulture))
			{
				return "application/zip";
			}
			return "application/octet-stream";
		}
	}
}