///<summary>
/// check that an up-to-date content exists in the cache folder for 'url'.
///</summary>
/// <param name="url">URL to a cached file, excluding the server-side time stamp, e.g. /MG1VAI3T_MP_0$$$_$_$_N02400$$$$G8FM01_.xml.</param>
/// <param name="remoteTime">modification time of the file on the server side.</param>
///<returns>true if content exists for 'url' and matches 'remoteTime'.</returns>
public bool CheckFile(string url, string remoteTime)
{
bool upToDateContentFound = false;
lock (this)
{
String localFilename = URLToLocalFileName(url);
String localTime = HandleFiles.getFileTime(localFilename);
upToDateContentFound = (HandleFiles.equals(localTime, remoteTime));
}
return(upToDateContentFound);
}
/// <summary>
/// get content from the cache; if the cached content's loading time differs from 'remoteTime', return null.
/// </summary>
/// <param name="url">URL to a cached file, excluding the server-side time stamp, e.g. /MG1VAI3T_MP_0$$$_$_$_N02400$$$$G8FM01_.xml.</param>
/// <param name="remoteTime"></param>
public byte[] GetFile(String url, String remoteTime)
{
lock (this)
{
byte[] content = null;
String localFilename = URLToLocalFileName(url);
String localTime = HandleFiles.getFileTime(localFilename);
if (HandleFiles.equals(localTime, remoteTime))
{
content = HandleFiles.readToByteArray(localFilename, "");
}
return(content);
}
}
/// <summary>
/// checks file exist with specified remote time.
/// when remote time is null, then check only file is exist or not
/// otherwise check if source with remotetime exist
/// </summary>
/// <param name="fileFullName">Full name of the file</param>
/// <param name="remoteTime">last modification time of the file (for story#138618: remote time will be null)</param>
/// <returns></returns>
private bool IsFileExistWithRequestedTime(String fileFullName, String remoteTime)
{
bool isFileExist = HandleFiles.isExists(fileFullName);
try
{
if (isFileExist && remoteTime != null)
{
String localTime = HandleFiles.getFileTime(fileFullName);
if (!HandleFiles.equals(localTime, remoteTime))
{
isFileExist = false;
}
}
}
catch (Exception exception)
{
Logger.Instance.WriteExceptionToLog(exception.Message);
throw;
}
return(isFileExist);
}
