public SPFileOutputStream(SPDirectory directory, SPFile file)
{
if (directory == null)
{
throw new ArgumentNullException("directory");
}
if (file == null)
{
throw new ArgumentNullException("file");
}
if (file.Exists == false)
{
throw new ArgumentException("A file object was passed, but the file does not exist. " + file.Url);
}
m_directory = directory;
m_fileName = file.Name;
m_fileUrl = SPUtility.ConcatUrls(file.Web.Url, file.ServerRelativeUrl);
m_mutex = SPFileMutexManager.GrabMutex(m_fileUrl);
m_mutex.WaitOne();
try
{
m_indexOutput = m_directory.CacheDirectory.CreateOutput(file.Name);
}
finally
{
m_mutex.ReleaseMutex();
}
}
public SPFileInputStream(SPDirectory directory, SPFile file)
{
if (directory == null)
{
throw new ArgumentNullException("directory");
}
if (file == null)
{
throw new ArgumentNullException("file");
}
var fileUrl = SPUtility.ConcatUrls(file.Web.Url, file.ServerRelativeUrl);
m_directory = directory;
m_mutex = SPFileMutexManager.GrabMutex(fileUrl);
m_mutex.WaitOne();
try
{
if (!m_directory.CacheDirectory.FileExists(file.Name))
{
CreateOrUpdateCachedFile(file, directory);
}
else
{
//Check the eTag.
var cachedETag = m_directory.ReadCachedFileETag(file.Name);
//If it doesn't match, re-retrieve the file from SharePoint.
if (cachedETag != file.ETag)
{
CreateOrUpdateCachedFile(file, directory);
}
}
m_indexInput = m_directory.CacheDirectory.OpenInput(file.Name);
}
finally
{
m_mutex.ReleaseMutex();
}
}