private static string GetfileName(string url)
{
if (url.EndsWith("/"))
{
url += ".default";
}
return(ConfigFileManager.GetConfig <NetConfig>().TempPath + url.Replace("http://", ""));
}
/// <summary>
/// 直接返回流,如果文件存在且配置为不检查更新则会返回文件流
/// </summary>
/// <returns></returns>
public Stream GetResponseStream()
{
if (!ConfigFileManager.GetConfig <NetConfig>().CheckUpdate&& File.Exists(LocalFileName))
{
try
{
return(GetFileStream(LocalFileName));
}
catch (Exception)
{
}
}
return(GetResponse().GetResponseStream());
}
//public void AddRange(string rangeSpecifier, long range)
//{
// _webRequest.AddRange(rangeSpecifier, range);
//}
public HttpWebResponse GetResponse()
{
if (ConfigFileManager.GetConfig <NetConfig>().UseCache&& _webRequest.Method.Equals("GET", StringComparison.OrdinalIgnoreCase))
{
global::System.IO.FileInfo fileInfo = new FileInfo(LocalFileName); //lockHttpFileHelper.FileInfo;
if (fileInfo.Exists && fileInfo.Length > 0)
{
_webRequest.IfModifiedSince = fileInfo.LastWriteTime;
}
global::System.Net.HttpWebResponse response;
try
{
response = (global::System.Net.HttpWebResponse)_webRequest.GetResponse();
}
catch (WebException exception)
{
response = (HttpWebResponse)exception.Response;
if (response.StatusCode != HttpStatusCode.NotModified)
{
response.Close();
throw;
}
}
if (response.StatusCode == HttpStatusCode.NotModified) //未改变
{
_isFromCacheFieldInfo.SetValue(response, true);
Stream fileStream = GetFileStream(fileInfo.FullName);
_responseStreamPropertyInfo.SetValue(response, fileStream, null);
}
else
{
if (!fileInfo.Directory.Exists)
{
fileInfo.Directory.Create();
}
HttpFileStream httpStream = new HttpFileStream(response, fileInfo);
_responseStreamPropertyInfo.SetValue(response, httpStream, null);
}
_response = response;
return(response);
}
_response = _webRequest.GetResponse() as HttpWebResponse;
return(_response);
}
