private APIResponse LoadAPI(string url)
{
DateTime lastModified = old_date;
APIResponse result = null;
StorageEntry se = cache.GetText(url);
if (se != null)
{
lastModified = se.LastModified;
}
HttpWebRequest wr = (HttpWebRequest)HttpWebRequest.Create(url);
wr.IfModifiedSince = lastModified;
wr.UserAgent = ChanArchiver.Program.get_random_user_agent();
WebResponse wbr = null;
try
{
byte[] data;
wbr = wr.GetResponse();
using (Stream s = wbr.GetResponseStream())
{
int iByteSize = 0;
byte[] byteBuffer = new byte[2048];
using (MemoryStream MemIo = new MemoryStream())
{
while ((iByteSize = s.Read(byteBuffer, 0, 2048)) > 0)
{
MemIo.Write(byteBuffer, 0, iByteSize);
ChanArchiver.NetworkUsageCounter.Add_ApiConsumed(iByteSize);
}
data = MemIo.ToArray();
}
}
string text = System.Text.Encoding.UTF8.GetString(data.ToArray());
string lm = wbr.Headers["Last-Modified"];
DateTime lmm = DateTime.Parse(lm);
cache.StoreText(url, text, lmm);
result = new APIResponse(text, APIResponse.ErrorType.NoError);
}
catch (WebException wex)
{
HttpWebResponse httpResponse = wex.Response as HttpWebResponse;
if (httpResponse != null)
{
if (httpResponse.StatusCode == HttpStatusCode.NotModified)
{
if (se != null)
{
result = new APIResponse(se.Text, APIResponse.ErrorType.NoError);
}
}
else if (httpResponse.StatusCode == HttpStatusCode.NotFound)
{
result = new APIResponse(null, APIResponse.ErrorType.NotFound);
//delete cache entry since resource has 404'ed
cache.ClearText(url);
}
else
{
result = new APIResponse(wex.Message, APIResponse.ErrorType.Other);
//throw wex;
}
}
else
{
result = new APIResponse(wex.Message, APIResponse.ErrorType.Other);
//throw wex;
}
}
if (wbr != null)
{
wbr.Close();
}
return(result);
}