public string DownloadString(string url)
{
this.LazyLoad();
string content = this.GetCachedPage(url);
if (content == null)
{
using (WebClient client = new WebClient())
{
content = client.DownloadString(url);
}
CachedPage page = new CachedPage();
page.Id = GetNextId();
page.FileName = string.Format("{0}.htm", page.Id);
page.Status = CacheStatus.Cached;
page.Url = url;
page.Date = DateTime.Now;
lock (this.pages)
{
pages.Add(url, page);
}
this.CachePage(page, content);
this.SaveCache();
}
return(content);
}
private void CachePage(CachedPage page, string content)
{
if (!Directory.Exists(this.cacheDirectory))
{
Directory.CreateDirectory(this.cacheDirectory);
}
string cachedFileName = Path.Combine(this.cacheDirectory, page.FileName);
File.WriteAllText(cachedFileName, content);
}
private string GetCachedPage(string url)
{
lock (this.pages)
{
if (this.pages.ContainsKey(url))
{
CachedPage page = this.pages[url];
string cachedFileName = Path.Combine(this.cacheDirectory, page.FileName);
return(File.ReadAllText(cachedFileName));
}
}
return(null);
}