The next generation of the Teknik Services. Written in ASP.NET.
https://www.teknik.io/
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406 rivejä
20 KiB
406 rivejä
20 KiB
using nClam; |
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using Piwik.Tracker; |
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using System; |
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using System.Collections.Generic; |
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using System.Data.Entity; |
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using System.Drawing; |
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using System.Drawing.Imaging; |
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using System.IO; |
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using System.Linq; |
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using System.Web; |
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using System.Web.Mvc; |
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using Teknik.Areas.Error.ViewModels; |
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using Teknik.Areas.Upload.Models; |
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using Teknik.Areas.Upload.ViewModels; |
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using Teknik.Areas.Users.Utility; |
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using Teknik.Controllers; |
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using Teknik.Filters; |
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using Teknik.Utilities; |
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using Teknik.Models; |
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using Teknik.Attributes; |
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using System.Text; |
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using Org.BouncyCastle.Crypto; |
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namespace Teknik.Areas.Upload.Controllers |
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{ |
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[TeknikAuthorize] |
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public class UploadController : DefaultController |
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{ |
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// GET: Upload/Upload |
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[HttpGet] |
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[TrackPageView] |
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[AllowAnonymous] |
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public ActionResult Index() |
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{ |
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ViewBag.Title = "Teknik Upload - End to End Encryption"; |
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UploadViewModel model = new UploadViewModel(); |
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model.CurrentSub = Subdomain; |
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using (TeknikEntities db = new TeknikEntities()) |
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{ |
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Users.Models.User user = UserHelper.GetUser(db, User.Identity.Name); |
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if (user != null) |
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{ |
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model.Encrypt = user.UploadSettings.Encrypt; |
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model.Vaults = user.Vaults.ToList(); |
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} |
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else |
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{ |
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model.Encrypt = false; |
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} |
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} |
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return View(model); |
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} |
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[HttpPost] |
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[AllowAnonymous] |
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public ActionResult Upload(string fileType, string fileExt, string iv, int keySize, int blockSize, bool encrypt, HttpPostedFileWrapper data) |
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{ |
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try |
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{ |
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if (Config.UploadConfig.UploadEnabled) |
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{ |
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if (data.ContentLength <= Config.UploadConfig.MaxUploadSize) |
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{ |
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// convert file to bytes |
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int contentLength = data.ContentLength; |
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|
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// Scan the file to detect a virus |
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if (Config.UploadConfig.VirusScanEnable) |
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{ |
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ClamClient clam = new ClamClient(Config.UploadConfig.ClamServer, Config.UploadConfig.ClamPort); |
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clam.MaxStreamSize = Config.UploadConfig.MaxUploadSize; |
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ClamScanResult scanResult = clam.SendAndScanFile(data.InputStream); |
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switch (scanResult.Result) |
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{ |
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case ClamScanResults.Clean: |
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break; |
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case ClamScanResults.VirusDetected: |
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return Json(new { error = new { message = string.Format("Virus Detected: {0}. As per our <a href=\"{1}\">Terms of Service</a>, Viruses are not permited.", scanResult.InfectedFiles.First().VirusName, Url.SubRouteUrl("tos", "TOS.Index")) } }); |
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case ClamScanResults.Error: |
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return Json(new { error = new { message = string.Format("Error scanning the file upload for viruses. {0}", scanResult.RawResult) } }); |
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case ClamScanResults.Unknown: |
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return Json(new { error = new { message = string.Format("Unknown result while scanning the file upload for viruses. {0}", scanResult.RawResult) } }); |
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} |
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} |
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using (TeknikEntities db = new TeknikEntities()) |
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{ |
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Models.Upload upload = Uploader.SaveFile(db, Config, data.InputStream, fileType, contentLength, encrypt, fileExt, iv, null, keySize, blockSize); |
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if (upload != null) |
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{ |
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if (User.Identity.IsAuthenticated) |
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{ |
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Users.Models.User user = UserHelper.GetUser(db, User.Identity.Name); |
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if (user != null) |
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{ |
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upload.UserId = user.UserId; |
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db.Entry(upload).State = EntityState.Modified; |
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db.SaveChanges(); |
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} |
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} |
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return Json(new { result = new { name = upload.Url, url = Url.SubRouteUrl("u", "Upload.Download", new { file = upload.Url }), contentType = upload.ContentType, contentLength = StringHelper.GetBytesReadable(upload.ContentLength), deleteUrl = Url.SubRouteUrl("u", "Upload.Delete", new { file = upload.Url, key = upload.DeleteKey }) } }, "text/plain"); |
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} |
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return Json(new { error = new { message = "Unable to upload file" } }); |
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} |
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} |
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else |
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{ |
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return Json(new { error = new { message = "File Too Large" } }); |
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} |
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} |
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return Json(new { error = new { message = "Uploads are disabled" } }); |
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} |
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catch (Exception ex) |
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{ |
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return Json(new { error = new { message = "Exception while uploading file: " + ex.GetFullMessage(true) } }); |
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} |
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} |
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// User did not supply key |
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[HttpGet] |
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[TrackDownload] |
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[AllowAnonymous] |
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public ActionResult Download(string file) |
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{ |
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if (Config.UploadConfig.DownloadEnabled) |
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{ |
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ViewBag.Title = "Teknik Download - " + file; |
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string fileName = string.Empty; |
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string url = string.Empty; |
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string key = string.Empty; |
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string iv = string.Empty; |
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string contentType = string.Empty; |
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long contentLength = 0; |
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DateTime dateUploaded = new DateTime(); |
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using (TeknikEntities db = new TeknikEntities()) |
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{ |
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Models.Upload uploads = db.Uploads.Where(up => up.Url == file).FirstOrDefault(); |
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if (uploads != null) |
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{ |
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uploads.Downloads += 1; |
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db.Entry(uploads).State = EntityState.Modified; |
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db.SaveChanges(); |
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fileName = uploads.FileName; |
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url = uploads.Url; |
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key = uploads.Key; |
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iv = uploads.IV; |
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contentType = uploads.ContentType; |
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contentLength = uploads.ContentLength; |
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dateUploaded = uploads.DateUploaded; |
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} |
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else |
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{ |
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return Redirect(Url.SubRouteUrl("error", "Error.Http404")); |
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} |
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} |
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// We don't have the key, so we need to decrypt it client side |
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if (string.IsNullOrEmpty(key) && !string.IsNullOrEmpty(iv)) |
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{ |
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DownloadViewModel model = new DownloadViewModel(); |
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model.FileName = file; |
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model.ContentType = contentType; |
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model.ContentLength = contentLength; |
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model.IV = iv; |
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return View(model); |
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} |
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else // We have the key, so that means server side decryption |
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{ |
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// Are they downloading it by range? |
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bool byRange = !string.IsNullOrEmpty(Request.ServerVariables["HTTP_RANGE"]); // We do not support ranges |
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// Check to see if they have a cache |
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bool isCached = !string.IsNullOrEmpty(Request.Headers["If-Modified-Since"]); |
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if (isCached) |
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{ |
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// The file is cached, let's just 304 this |
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Response.StatusCode = 304; |
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Response.StatusDescription = "Not Modified"; |
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Response.AddHeader("Content-Length", "0"); |
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return Content(string.Empty); |
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} |
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else |
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{ |
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string subDir = fileName[0].ToString(); |
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string filePath = Path.Combine(Config.UploadConfig.UploadDirectory, subDir, fileName); |
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long startByte = 0; |
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long endByte = contentLength - 1; |
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long length = contentLength; |
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if (System.IO.File.Exists(filePath)) |
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{ |
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#region Range Calculation |
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// check to see if we need to pass a specified range |
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if (byRange) |
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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 + "/" + 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]) : 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 > contentLength - 1 || anotherEnd >= contentLength) |
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{ |
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Response.AddHeader("Content-Range", "bytes " + startByte + "-" + endByte + "/" + 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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// Ranges are response of 206 |
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Response.StatusCode = 206; |
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} |
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#endregion |
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// Add cache parameters |
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Response.Cache.SetCacheability(HttpCacheability.Public); |
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Response.Cache.SetMaxAge(new TimeSpan(365, 0, 0, 0)); |
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Response.Cache.SetLastModified(dateUploaded); |
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// We accept ranges |
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Response.AddHeader("Accept-Ranges", "0-" + contentLength); |
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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 + "/" + contentLength); |
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// Notify the client the content length we'll be outputting |
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Response.AddHeader("Content-Length", length.ToString()); |
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// Create content disposition |
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var cd = new System.Net.Mime.ContentDisposition |
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{ |
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FileName = url, |
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Inline = true |
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}; |
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Response.AddHeader("Content-Disposition", cd.ToString()); |
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// We need to prevent html (make cleaner later) |
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if (contentType == "text/html") |
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{ |
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contentType = "text/plain"; |
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} |
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// Read in the file |
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FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read); |
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// Reset file stream to starting position (or start of range) |
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fs.Seek(startByte, SeekOrigin.Begin); |
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try |
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{ |
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// If the IV is set, and Key is set, then decrypt it while sending |
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if (!string.IsNullOrEmpty(key) && !string.IsNullOrEmpty(iv)) |
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{ |
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byte[] keyBytes = Encoding.UTF8.GetBytes(key); |
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byte[] ivBytes = Encoding.UTF8.GetBytes(iv); |
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return new FileGenerateResult(url, |
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contentType, |
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(response) => ResponseHelper.StreamToOutput(response, true, new AESCryptoStream(fs, false, keyBytes, ivBytes), (int)length, Config.UploadConfig.ChunkSize), |
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false); |
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} |
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else // Otherwise just send it |
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{ |
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// Send the file |
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return new FileGenerateResult(url, |
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contentType, |
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(response) => ResponseHelper.StreamToOutput(response, true, fs, (int)length, Config.UploadConfig.ChunkSize), |
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false); |
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} |
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} |
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catch (Exception ex) |
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{ |
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Logging.Logger.WriteEntry(Logging.LogLevel.Warning, "Error in Download", ex); |
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} |
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} |
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} |
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return Redirect(Url.SubRouteUrl("error", "Error.Http404")); |
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} |
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} |
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return Redirect(Url.SubRouteUrl("error", "Error.Http403")); |
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} |
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[HttpPost] |
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[AllowAnonymous] |
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public FileResult DownloadData(string file) |
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{ |
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if (Config.UploadConfig.DownloadEnabled) |
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{ |
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using (TeknikEntities db = new TeknikEntities()) |
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{ |
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Models.Upload upload = db.Uploads.Where(up => up.Url == file).FirstOrDefault(); |
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if (upload != null) |
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{ |
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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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if (System.IO.File.Exists(filePath)) |
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{ |
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FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read); |
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return File(fileStream, System.Net.Mime.MediaTypeNames.Application.Octet, file); |
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} |
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} |
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Redirect(Url.SubRouteUrl("error", "Error.Http404")); |
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return null; |
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} |
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} |
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Redirect(Url.SubRouteUrl("error", "Error.Http403")); |
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return null; |
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} |
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[HttpGet] |
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[AllowAnonymous] |
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public ActionResult Delete(string file, string key) |
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{ |
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using (TeknikEntities db = new TeknikEntities()) |
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{ |
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ViewBag.Title = "File Delete - " + file + " - " + Config.Title; |
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Models.Upload upload = db.Uploads.Where(up => up.Url == file).FirstOrDefault(); |
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if (upload != null) |
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{ |
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DeleteViewModel model = new DeleteViewModel(); |
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model.File = file; |
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if (!string.IsNullOrEmpty(upload.DeleteKey) && upload.DeleteKey == key) |
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{ |
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string filePath = upload.FileName; |
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// Delete from the DB |
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db.Uploads.Remove(upload); |
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db.SaveChanges(); |
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// Delete the File |
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if (System.IO.File.Exists(filePath)) |
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{ |
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System.IO.File.Delete(filePath); |
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} |
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model.Deleted = true; |
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} |
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else |
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{ |
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model.Deleted = false; |
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} |
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return View(model); |
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} |
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return RedirectToRoute("Error.Http404"); |
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} |
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} |
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[HttpPost] |
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public ActionResult GenerateDeleteKey(string file) |
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{ |
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using (TeknikEntities db = new TeknikEntities()) |
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{ |
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Models.Upload upload = db.Uploads.Where(up => up.Url == file).FirstOrDefault(); |
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if (upload != null) |
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{ |
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if (upload.User.Username == User.Identity.Name) |
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{ |
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string delKey = StringHelper.RandomString(Config.UploadConfig.DeleteKeyLength); |
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upload.DeleteKey = delKey; |
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db.Entry(upload).State = EntityState.Modified; |
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db.SaveChanges(); |
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return Json(new { result = new { url = Url.SubRouteUrl("u", "Upload.Delete", new { file = file, key = delKey }) } }); |
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} |
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return Json(new { error = new { message = "You do not own this upload" } }); |
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} |
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return Json(new { error = new { message = "Invalid URL" } }); |
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} |
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} |
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} |
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} |