public ExtendedHttpWebResponse(Uri responseUri, WebResponse response, Stream responseStream, CacheInfo cacheInfo)
{
this.responseUri = responseUri;
this.response = response;
this.responseStream = responseStream;
this.cacheInfo = cacheInfo;
}
private WebRequest getRequest(CacheInfo cacheInfo)
{
WebRequest request;
if(cacheInfo != null &&
cacheInfo.CachedUri != null &&
cacheInfo.Expires > DateTime.Now)
{
request = WebRequest.Create(cacheInfo.CachedUri);
}
else
{
request = WebRequest.CreateDefault(RequestUri);
}
HttpWebRequest hRequest = request as HttpWebRequest;
if(hRequest != null && cacheInfo != null && cacheInfo.CachedUri != null)
{
if(cacheInfo.ETag != null)
{
hRequest.Headers["If-None-Match"] = cacheInfo.ETag;
}
if(cacheInfo.LastModified != DateTime.MinValue)
{
hRequest.IfModifiedSince = cacheInfo.LastModified;
}
hRequest.Headers["Accept-Encoding"] = "deflate, gzip" ;
}
return request;
}
private CacheInfo processResponse(WebResponse response)
{
HttpWebResponse hResponse = response as HttpWebResponse;
CacheInfo cacheInfo = null;
if(hResponse != null)
{
DateTime expires;
if(hResponse.Headers["Expires"] != null)
{
expires = DateTime.Parse(hResponse.Headers["Expires"]);
}
else
{
expires = DateTime.MinValue;
}
cacheInfo = new CacheInfo(expires, hResponse.Headers["Etag"], hResponse.LastModified, null, hResponse.ContentType);
}
return cacheInfo;
}
private WebResponse getResponse(WebRequest request, CacheInfo cacheInfo)
{
WebResponse response = null;
try
{
response = request.GetResponse();
}
catch(WebException webEx)
{
HttpWebResponse hresp2 = webEx.Response as HttpWebResponse;
if(hresp2 != null)
{
if(hresp2.StatusCode == HttpStatusCode.NotModified)
{
if(cacheInfo != null && cacheInfo.CachedUri != null)
{
request = WebRequest.Create(cacheInfo.CachedUri);
}
else
{
request = WebRequest.Create(RequestUri);
}
response = request.GetResponse();
}
}
}
return response;
}
public void SetCacheInfo(Uri uri, CacheInfo cacheInfo, Stream stream)
{
}
public void SetCacheInfo(Uri uri, CacheInfo cacheInfo, Stream stream)
{
XmlElement cacheElm = GetCacheElm(uri);
if(cacheInfo != null)
{
if(cacheInfo.ETag != null)
{
cacheElm.SetAttribute("etag", cacheInfo.ETag);
}
else
{
cacheElm.RemoveAttribute("etag");
}
if(cacheInfo.ContentType != null)
{
cacheElm.SetAttribute("content-type", cacheInfo.ContentType);
}
else
{
cacheElm.RemoveAttribute("content-type");
}
if(cacheInfo.Expires != DateTime.MinValue)
{
cacheElm.SetAttribute("expires", cacheInfo.Expires.ToString("s"));
}
else
{
cacheElm.RemoveAttribute("expires");
}
if(cacheInfo.LastModified != DateTime.MinValue)
{
cacheElm.SetAttribute("last-modified", cacheInfo.LastModified.ToString("s"));
}
else
{
cacheElm.RemoveAttribute("last-modified");
}
}
if (stream != null)
{
string localPath;
if(cacheElm.HasAttribute("local-path"))
{
localPath = cacheElm.GetAttribute("local-path");
}
else
{
localPath = Guid.NewGuid().ToString() + ".cache";
cacheElm.SetAttribute("local-path", localPath);
}
stream.Position = 0;
int count;
byte[] buffer = new byte[4096];
FileStream fs = File.OpenWrite(Path.Combine(cacheDir, localPath));
while((count = stream.Read(buffer, 0, 4096)) > 0) fs.Write(buffer, 0, count);
fs.Flush();
fs.Close();
}
SaveDoc();
}
public ExtendedHttpWebResponse(Uri responseUri, WebResponse response, Stream responseStream, CacheInfo cacheInfo)
{
this.responseUri = responseUri;
this.response = response;
this.responseStream = responseStream;
this.cacheInfo = cacheInfo;
}
public void SetCacheInfo(Uri uri, CacheInfo cacheInfo, Stream stream)
{
}
/// <summary>
/// Initializes an instance of the <see cref="ExtendedHttpWebResponse"/> class with the specified parameters.
/// </summary>
/// <param name="responseUri">The URI of the Internet resource that actually responded to the request.</param>
/// <param name="response">The wrapped <see cref="WebResponse"/> instance, that provides a response from a Uniform Resource Identifier (URI). </param>
/// <param name="responseStream">The data stream from the Internet resource.</param>
/// <param name="cacheInfo">The caching information.</param>
public ExtendedHttpWebResponse(Uri responseUri, WebResponse response, Stream responseStream, CacheInfo cacheInfo)
{
_responseUri = responseUri;
_response = response;
_responseStream = responseStream;
_cacheInfo = cacheInfo;
}