internal static void CopyAlways(string source, string target)
{
if (!File.Exists(source))
{
return;
}
Directory.CreateDirectory(Path.GetDirectoryName(target));
IOLibrary.MakeWritable(target);
File.Copy(source, target, true);
}
private HttpStatusCode Get(Uri uri, string method, string path, HtmlDocument doc)
{
string cachePath = null;
HttpWebRequest req;
bool oldFile = false;
req = WebRequest.Create(uri) as HttpWebRequest;
req.Method = method;
_fromCache = false;
_requestDuration = 0;
int tc = Environment.TickCount;
if (UsingCache)
{
cachePath = GetCachePath(req.RequestUri);
if (File.Exists(cachePath))
{
req.IfModifiedSince = File.GetLastAccessTime(cachePath);
oldFile = true;
}
}
if (_cacheOnly)
{
if (!File.Exists(cachePath))
{
throw new HtmlWebException("File was not found at cache path: '" + cachePath + "'");
}
if (path != null)
{
IOLibrary.CopyAlways(cachePath, path);
// touch the file
File.SetLastWriteTime(path, File.GetLastWriteTime(cachePath));
}
_fromCache = true;
return(HttpStatusCode.NotModified);
}
if (_useCookies)
{
req.CookieContainer = new CookieContainer();
}
if (PreRequest != null)
{
// allow our user to change the request at will
if (!PreRequest(req))
{
return(HttpStatusCode.ResetContent);
}
// dump cookie
// if (_useCookies)
// {
// foreach(Cookie cookie in req.CookieContainer.GetCookies(req.RequestUri))
// {
// HtmlLibrary.Trace("Cookie " + cookie.Name + "=" + cookie.Value + " path=" + cookie.Path + " domain=" + cookie.Domain);
// }
// }
}
HttpWebResponse resp;
try
{
resp = req.GetResponse() as HttpWebResponse;
}
catch (WebException we)
{
_requestDuration = Environment.TickCount - tc;
resp = (HttpWebResponse)we.Response;
if (resp == null)
{
if (oldFile)
{
if (path != null)
{
IOLibrary.CopyAlways(cachePath, path);
// touch the file
File.SetLastWriteTime(path, File.GetLastWriteTime(cachePath));
}
return(HttpStatusCode.NotModified);
}
throw;
}
}
catch (Exception)
{
_requestDuration = Environment.TickCount - tc;
throw;
}
// allow our user to get some info from the response
if (PostResponse != null)
{
PostResponse(req, resp);
}
_requestDuration = Environment.TickCount - tc;
_responseUri = resp.ResponseUri;
bool html = IsHtmlContent(resp.ContentType);
System.Text.Encoding respenc;
/// 芦侃修改 2008-7-11 15:12:35
try
{
respenc = System.Text.Encoding.GetEncoding(resp.ContentEncoding);
}
catch (Exception)
{
try
{
switch (resp.CharacterSet.ToLower())
{
case "iso-8859-1":
respenc = Encoding.Default;
break;
default:
respenc = System.Text.Encoding.GetEncoding(resp.CharacterSet);
break;
}
}
catch (Exception)
{
respenc = Encoding.Default;
}
}
Stream s;
if (resp.ContentEncoding.ToLower().Equals("gzip"))
{
/// 如果页面采用了GZip进行压缩，调用.net的GZip类进行解压
s = new GZipStream(resp.GetResponseStream(), CompressionMode.Decompress);
}
else
{
s = resp.GetResponseStream();
}
/**********芦侃修改结束**********/
if (resp.StatusCode == HttpStatusCode.NotModified)
{
if (UsingCache)
{
_fromCache = true;
if (path != null)
{
IOLibrary.CopyAlways(cachePath, path);
// touch the file
File.SetLastWriteTime(path, File.GetLastWriteTime(cachePath));
}
return(resp.StatusCode);
}
else
{
// this should *never* happen...
throw new HtmlWebException("Server has send a NotModifed code, without cache enabled.");
}
}
if (s != null)
{
if (UsingCache)
{
// NOTE: LastModified does not contain milliseconds, so we remove them to the file
SaveStream(s, cachePath, RemoveMilliseconds(resp.LastModified), _streamBufferSize);
// save headers
SaveCacheHeaders(req.RequestUri, resp);
if (path != null)
{
// copy and touch the file
IOLibrary.CopyAlways(cachePath, path);
File.SetLastWriteTime(path, File.GetLastWriteTime(cachePath));
}
}
else
{
// try to work in-memory
if ((doc != null) && (html))
{
if (respenc != null)
{
doc.Load(s, respenc);
}
else
{
doc.Load(s, true);
}
}
}
resp.Close();
}
return(resp.StatusCode);
}
private HttpStatusCode Get(Uri uri, string method, string path, HtmlDocument doc, IWebProxy proxy,
ICredentials creds)
{
string cachePath = null;
HttpWebRequest req;
bool oldFile = false;
req = WebRequest.Create(uri) as HttpWebRequest;
req.Method = method;
if (proxy != null)
{
if (creds != null)
{
proxy.Credentials = creds;
req.Credentials = creds;
}
else
{
proxy.Credentials = CredentialCache.DefaultCredentials;
req.Credentials = CredentialCache.DefaultCredentials;
}
req.Proxy = proxy;
}
_fromCache = false;
_requestDuration = 0;
int tc = Environment.TickCount;
if (UsingCache)
{
cachePath = GetCachePath(req.RequestUri);
if (File.Exists(cachePath))
{
req.IfModifiedSince = File.GetLastAccessTime(cachePath);
oldFile = true;
}
}
if (_cacheOnly)
{
if (!File.Exists(cachePath))
{
throw new HtmlWebException("File was not found at cache path: '" + cachePath + "'");
}
if (path != null)
{
IOLibrary.CopyAlways(cachePath, path);
// touch the file
File.SetLastWriteTime(path, File.GetLastWriteTime(cachePath));
}
_fromCache = true;
return(HttpStatusCode.NotModified);
}
if (_useCookies)
{
req.CookieContainer = new CookieContainer();
}
if (PreRequest != null)
{
// allow our user to change the request at will
if (!PreRequest(req))
{
return(HttpStatusCode.ResetContent);
}
// dump cookie
// if (_useCookies)
// {
// foreach(Cookie cookie in req.CookieContainer.GetCookies(req.RequestUri))
// {
// HtmlLibrary.Trace("Cookie " + cookie.Name + "=" + cookie.Value + " path=" + cookie.Path + " domain=" + cookie.Domain);
// }
// }
}
HttpWebResponse resp;
try
{
resp = req.GetResponse() as HttpWebResponse;
}
catch (WebException we)
{
_requestDuration = Environment.TickCount - tc;
resp = (HttpWebResponse)we.Response;
if (resp == null)
{
if (oldFile)
{
if (path != null)
{
IOLibrary.CopyAlways(cachePath, path);
// touch the file
File.SetLastWriteTime(path, File.GetLastWriteTime(cachePath));
}
return(HttpStatusCode.NotModified);
}
throw;
}
}
catch (Exception)
{
_requestDuration = Environment.TickCount - tc;
throw;
}
// allow our user to get some info from the response
if (PostResponse != null)
{
PostResponse(req, resp);
}
_requestDuration = Environment.TickCount - tc;
_responseUri = resp.ResponseUri;
bool html = IsHtmlContent(resp.ContentType);
Encoding respenc;
if ((resp.ContentEncoding != null) && (resp.ContentEncoding.Length > 0))
{
respenc = Encoding.GetEncoding(resp.ContentEncoding);
}
else
{
respenc = null;
}
if (resp.StatusCode == HttpStatusCode.NotModified)
{
if (UsingCache)
{
_fromCache = true;
if (path != null)
{
IOLibrary.CopyAlways(cachePath, path);
// touch the file
File.SetLastWriteTime(path, File.GetLastWriteTime(cachePath));
}
return(resp.StatusCode);
}
else
{
// this should *never* happen...
throw new HtmlWebException("Server has send a NotModifed code, without cache enabled.");
}
}
Stream s = resp.GetResponseStream();
if (s != null)
{
if (UsingCache)
{
// NOTE: LastModified does not contain milliseconds, so we remove them to the file
SaveStream(s, cachePath, RemoveMilliseconds(resp.LastModified), _streamBufferSize);
// save headers
SaveCacheHeaders(req.RequestUri, resp);
if (path != null)
{
// copy and touch the file
IOLibrary.CopyAlways(cachePath, path);
File.SetLastWriteTime(path, File.GetLastWriteTime(cachePath));
}
}
else
{
// try to work in-memory
if ((doc != null) && (html))
{
if (respenc != null)
{
doc.Load(s, respenc);
}
else
{
doc.Load(s, true);
}
}
}
resp.Close();
}
return(resp.StatusCode);
}