private byte[] ReadFromDbFile(DbFileResource dbFile, int capacity, long position)
{
byte[] data, hash;
lock (dbFile)
ReadFromDbFile(dbFile, capacity, position, out data, out hash);
var control = new MD5CryptoServiceProvider().ComputeHash(data);
if (!control.SequenceEqual(hash))
{
return(null);
}
return(data);
}
/// <summary>
/// Test the connection with a nq file
/// </summary>
private void TestConnection()
{
try
{
if (!Directory.Exists(FilesDirectory))
{
Directory.CreateDirectory(FilesDirectory);
}
string testFilePath = $"{FilesDirectory}/test.nq";
string downloadedTestFilePath = $"{FilesDirectory}/downloadedtest.nq";
//nq file creation
File.WriteAllText(testFilePath, $"Testing file... {DateTime.Now.Ticks}");
//summarie of nq file
byte[] fileHash = new MD5CryptoServiceProvider().ComputeHash(File.ReadAllBytes(testFilePath));
//download nq file
WebClient client = new WebClient();
client.DownloadFile($"{Uri}/test.nq", downloadedTestFilePath);
//summarie of downloaded nq file
byte[] downloadedFileHash = new MD5CryptoServiceProvider().ComputeHash(File.ReadAllBytes(downloadedTestFilePath));
//if the summaries are different, something is wrong
if (!fileHash.SequenceEqual(downloadedFileHash))
{
Console.Error.Write("The connection to the server could not be established or nq files are not supported.");
throw new WebException("The connection to the server could not be established or nq files are not supported.");
}
//Test resource api
string url = $"{ApiUrl}/resource/test-massive-load";
MassiveDataLoadTestResource resource = new MassiveDataLoadTestResource()
{
fileHash = fileHash,
url = $"{Uri}/test.nq"
};
WebRequestPostWithJsonObject(url, resource);
}
catch (Exception)
{
throw new WebException($"The connection to the server could not be established or nq files are not supported. {Uri}");
}
}