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Added Range support for file downloads.
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@ -126,6 +126,9 @@ namespace Teknik.Areas.Upload.Controllers
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{
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{
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string subDir = upload.FileName[0].ToString();
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string subDir = upload.FileName[0].ToString();
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string filePath = Path.Combine(Config.UploadConfig.UploadDirectory, subDir, upload.FileName);
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string filePath = Path.Combine(Config.UploadConfig.UploadDirectory, subDir, upload.FileName);
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long startByte = 0;
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long endByte = upload.ContentLength - 1;
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long length = upload.ContentLength;
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if (System.IO.File.Exists(filePath))
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if (System.IO.File.Exists(filePath))
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{
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{
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// Read in the file
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// Read in the file
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@ -137,6 +140,73 @@ namespace Teknik.Areas.Upload.Controllers
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data = AES.Decrypt(data, upload.Key, upload.IV);
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data = AES.Decrypt(data, upload.Key, upload.IV);
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}
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}
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// We accept ranges
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Response.AddHeader("Accept-Ranges", "0-" + upload.ContentLength);
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// check to see if we need to pass a specified range
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if (!String.IsNullOrEmpty(Request.ServerVariables["HTTP_RANGE"]))
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{
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long anotherStart = startByte;
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long anotherEnd = endByte;
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string[] arr_split = Request.ServerVariables["HTTP_RANGE"].Split(new char[] { '=' });
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string range = arr_split[1];
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// Make sure the client hasn't sent us a multibyte range
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if (range.IndexOf(",") > -1)
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{
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// (?) Shoud this be issued here, or should the first
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// range be used? Or should the header be ignored and
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// we output the whole content?
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Response.AddHeader("Content-Range", "bytes " + startByte + "-" + endByte + "/" + upload.ContentLength);
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throw new HttpException(416, "Requested Range Not Satisfiable");
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}
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// If the range starts with an '-' we start from the beginning
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// If not, we forward the file pointer
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// And make sure to get the end byte if spesified
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if (range.StartsWith("-"))
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{
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// The n-number of the last bytes is requested
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anotherStart = startByte - Convert.ToInt64(range.Substring(1));
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}
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else
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{
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arr_split = range.Split(new char[] { '-' });
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anotherStart = Convert.ToInt64(arr_split[0]);
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long temp = 0;
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anotherEnd = (arr_split.Length > 1 && Int64.TryParse(arr_split[1].ToString(), out temp)) ? Convert.ToInt64(arr_split[1]) : upload.ContentLength;
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}
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/* Check the range and make sure it's treated according to the specs.
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* http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
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*/
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// End bytes can not be larger than $end.
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anotherEnd = (anotherEnd > endByte) ? endByte : anotherEnd;
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// Validate the requested range and return an error if it's not correct.
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if (anotherStart > anotherEnd || anotherStart > upload.ContentLength - 1 || anotherEnd >= upload.ContentLength)
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{
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Response.AddHeader("Content-Range", "bytes " + startByte + "-" + endByte + "/" + upload.ContentLength);
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throw new HttpException(416, "Requested Range Not Satisfiable");
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}
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startByte = anotherStart;
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endByte = anotherEnd;
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length = endByte - startByte + 1; // Calculate new content length
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// grab the portion of the data we want
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byte[] dataRange = new byte[length];
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Array.Copy(data, startByte, dataRange, 0, length);
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data = dataRange;
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// Ranges are response of 206
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Response.StatusCode = 206;
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}
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// Notify the client the byte range we'll be outputting
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Response.AddHeader("Content-Range", "bytes " + startByte + "-" + endByte + "/" + upload.ContentLength);
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Response.AddHeader("Content-Length", length.ToString());
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// Create content disposition
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// Create content disposition
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var cd = new System.Net.Mime.ContentDisposition
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var cd = new System.Net.Mime.ContentDisposition
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{
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{
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