Example #1
0
 public string GetAddr(CdnResource res)
 {
     if (res == null)
     {
         return(null);
     }
     return(res.GetAddr(this.UseCdn, this.UseDev));
 }
Example #2
0
        public void AddResource(string name, CdnResource res, string reqs)
        {
            if (!string.IsNullOrWhiteSpace(reqs))   // "data-req"
            {
                res.Requires = new List <CdnResource>();
                foreach (string dep in reqs.Split())
                {
                    var resDep = FindResource(dep, false);
                    Debug.Assert(resDep != null);
                    res.Requires.Add(resDep);
                }
            }

            Debug.Assert(!Resources.ContainsKey(name));
            Resources.Add(name, res);
            if (name != res.fallback_src)
            {
                Debug.Assert(!Resources.ContainsKey(res.fallback_src));
                Resources.Add(res.fallback_src, res);
            }

            // Add the Cdn Hosts to our list.
            if (res.CdnPath1 != null)
            {
                // add CDN Host info.
                string  host = UrlUtil.GetHostName(res.CdnPath1);
                CdnHost host1;
                if (!Hosts.TryGetValue(host, out host1))
                {
                    host1 = new CdnHost(host);
                    Hosts.Add(host, host1);
                }

                res.CdnHost1 = host1;
            }
        }
Example #3
0
        public async Task <int> InitCdnAsync(string cdnAllFilePath, string outDir)
        {
            // Make sure all my (local copy) CDN based resources are up to date.
            // Called ONCE at startup to read cdnAllFilePath.
            // 1. Read the HTML/XML cdnAllFilePath file.
            // 2. Pull all files from the CDN that we want locally as backups/fallback.
            // 3. Write out the local stuff to outDir. e.g. "wwwroot/cdn"

            if (!File.Exists(cdnAllFilePath))       // get my list from here.
            {
                return(0);
            }

            int       downloadCount = 0;
            int       fileCount     = 0;
            XDocument doc           = XDocument.Load(cdnAllFilePath); // TODO: Use HTML agility pack to deal with proper HTML (Not XML) encoding??

            var tasks = new List <Task <CdnRet> >();                  // allow background/parallel loading.

            // pull all 'a', 'link' and 'script' elements
            foreach (XNode node in doc.DescendantNodes())
            {
                if (node.NodeType != XmlNodeType.Element)
                {
                    continue;
                }

                var xl = node as XElement;
                if (!CdnResource.IsUsedElement(xl))
                {
                    continue;
                }

                var res = new CdnResource(xl);
                AddResource(res.name, res, xl.Attribute("data-req")?.Value);
                tasks.Add(res.SyncElement(outDir));
                fileCount++;

                if (tasks.Count < kMaxConcurrentUpdates)
                {
                    continue;
                }

                await Task.WhenAny(tasks.ToArray());        // Do the work.

                for (int i = 0; i < tasks.Count; i++)
                {
                    var task = tasks[i];
                    if (task.IsCompleted)
                    {
                        if (task.Result == CdnRet.Updated)
                        {
                            downloadCount++;
                        }
                        tasks.RemoveAt(i);  // done.
                        i--;
                    }
                }

                Debug.Assert(tasks.Count < kMaxConcurrentUpdates);
            }

            await Task.WhenAll(tasks.ToArray());        // do this in parallel.

            foreach (var task in tasks)
            {
                Debug.Assert(task.IsCompleted);
                if (task.Result == CdnRet.Updated)
                {
                    downloadCount++;
                }
            }

            return(downloadCount);
        }