Esempio n. 1
0
        private async Task Process(HttpContext context)
        {
            context.Response.ContentType = "binary/octet-stream";
            context.Response.AppendHeader("Content-Disposition", "attachment; filename=\"" + context.Server.UrlEncode(_id + "." + _version + ".nupkg") + "\"");

            string filename = context.Server.MapPath("~/packages/" + _id + "." + _version + ".nupkg");
            await SynchronizationHelp.Enter(filename);

            Stream stream = null;

            if (!File.Exists(filename))
            {
                try
                {
                    NugetDownloader downloader = new NugetDownloader(MvcApplication.NugetSource + context.Request.Url.PathAndQuery);
                    downloader.Progress += async(sender, buffer, length) =>
                    {
                        if (stream == null)
                        {
                            stream = File.Open(filename, FileMode.Create, FileAccess.ReadWrite, FileShare.Read);
                        }
                        await stream.WriteAsync(buffer, 0, length);

                        await context.Response.OutputStream.WriteAsync(buffer, 0, length);
                    };
                    await downloader.Download();

                    if (downloader.StatusCode != HttpStatusCode.OK)
                    {
                        if (stream != null)
                        {
                            stream.Close();
                            stream.Dispose();
                            File.Delete(filename);
                        }
                        context.Response.StatusCode = (int)downloader.StatusCode;
                        return;
                    }
                    else
                    {
                        stream.Close();
                        stream.Dispose();
                    }
                }
                finally
                {
                    SynchronizationHelp.Exit(filename);
                }
            }
            else
            {
                SynchronizationHelp.Exit(filename);
                //context.Request.Headers["Range"]
                stream = File.Open(filename, FileMode.Open, FileAccess.Read, FileShare.Read);
                await stream.CopyToAsync(context.Response.OutputStream);
            }
        }
Esempio n. 2
0
        private async Task Process(HttpContext context)
        {
            string path = context.Request.Url.PathAndQuery.ToLower();
            await SynchronizationHelp.Enter(path);

            Page        page;
            DataContext dataContext;

            try
            {
                dataContext = new DataContext();
                page        = dataContext.Page.SingleOrDefault(t => t.Path == path);
            }
            catch (Exception ex)
            {
                SynchronizationHelp.Exit(path);
                context.Response.StatusCode = 500;
                context.Response.Write(ex.Message);
                ExceptionLog(ex, context);
                return;
            }
            if (page == null)
            {
                page      = dataContext.Page.Create();
                page.Path = path;
                page.Id   = Guid.NewGuid();
                dataContext.Page.Add(page);
            }
            else
            {
                SynchronizationHelp.Exit(path);
            }
            byte[] pageContent = page.Content;
            if (page.ExpiredDate < DateTime.Now)
            {
                string key      = path;
                bool   download = true;
                if (pageContent != null)
                {
                    key      = "Download/" + path;
                    download = await SynchronizationHelp.TryEnter(key);
                }
                if (download)
                {
                    NugetDownloader downloader   = new NugetDownloader(MvcApplication.NugetSource + context.Request.Url.PathAndQuery.Substring(7));
                    Task <Task>     downloadTask = downloader.Download().ContinueWith(async t =>
                    {
                        if (downloader.StatusCode == HttpStatusCode.OK)
                        {
                            var reader       = new StreamReader(downloader.Stream);
                            var content      = await reader.ReadToEndAsync();
                            string replaceTo = context.Request.Url.Scheme + "://" + context.Request.Url.Host;
                            if (context.Request.Url.Port != 80)
                            {
                                replaceTo += ":" + context.Request.Url.Port;
                            }
                            replaceTo       += "/api/v2";
                            content          = content.Replace(MvcApplication.UrlReplace, replaceTo);
                            page.Content     = Encoding.UTF8.GetBytes(content);
                            page.ExpiredDate = DateTime.Now.AddSeconds(GetCacheTime(_action));
                        }
                        else
                        {
                            if (pageContent == null)
                            {
                                page.Content = new byte[0];
                            }
                            page.ExpiredDate = DateTime.Now.AddSeconds(10);
                        }
                        page.ContentType = downloader.ContentType;
                        await dataContext.SaveChangesAsync();
                    });
                    if (pageContent == null)
                    {
                        try
                        {
                            await await downloadTask;
                        }
                        catch (Exception ex)
                        {
                            context.Response.StatusCode = 500;
                            context.Response.Write(ex.Message);
                            ExceptionLog(ex, context);
                            return;
                        }
                        finally
                        {
                            SynchronizationHelp.Exit(key);
                        }
                        pageContent = page.Content;
                    }

                    if (page.Content == null || page.Content.Length == 0)
                    {
                        context.Response.StatusCode = 400;
                        return;
                    }
                }
            }
            context.Response.ContentType = page.ContentType;
            context.Response.Cache.SetExpires(page.ExpiredDate);
            if (pageContent.Length > 0)
            {
                await context.Response.OutputStream.WriteAsync(pageContent, 0, pageContent.Length);
            }
            await context.Response.OutputStream.FlushAsync();
        }