I am trying to connect to a MySQL server using Jdbc for Google Apps and getting an error as follows:
Failed to establish a database connection. Check connection string,
username and password. (line 10, file "dbadmin")
The following is a snipet of the code I am using:
var address = 'w.x.y.z';
var user = 'user';
var userPwd = 'password';
var db = 'dbname';
var dbUrl = 'jdbc:mysql://' + address + '/' + db;
var conn = Jdbc.getConnection(dbUrl, user, userPwd);
I have successfully connected to the Database from my own computer using both the IP and Hostname. I have confirmed the server should be accepted connections from ALL IPs for that account, and confirmed the ruleset is working by removing the whitelisting and adding it back again.
I am basically out of troubleshooting ideas of what is going on. What am I doing wrong, or what is wrong with Google?
A typical way to establish JDBC connection is as follows:
String url = "jdbc:mysql://hostname:3306/mydb";
String username = "username";
String password = "password"
Connection conn = DriverManager.getConnection(url, username, password);
You can refer to this for more detailed information.
Related
I am trying to connect to the Vendor's database through the Wallet. For that, the vendor has provided a wallet zip files which contains two files (one .ora file and one .sso file) . The zip file contains tnsnames.ora and cwallet.sso
First, I installed the Oracle client version 19.0 Home1 which has created a file called sqlnet.ora automatically. I copied the file tnsnames.ora to the same folder where sqlnet.ora created, and tried different wasys to connect the database, but every attempt failed. I tried to implement in similar way which is explained in this link, but getting errors that "TNS:Lost contact", "TNS:Could not resolved the connect identifier specified".
I tried the solution which specified here, but ended up in error. Finally, the error now is "Connection failed because target host or object does not exist". The connection details are specified in tnsnames. ora that contains the service name and host name. I have added the Wallet location in sqlnet.ora file and also the following code:
SSL_CLIENT_AUTHENTICATION = FALSE
SSL_VERSION = 1.2
SSL_CIPHER_SUITES = (SSL_RSA_WITH_AES_256_CBC_SHA)
SSL_SERVER_DN_MATCH = ON
The connection code in C# is below:
//string strCon = "User Id =XXXX;Password=XXXXXXX;Data Source=(DESCRIPTION =(ADDRESS=(PROTOCOL=TCP)(HOST=XXXXXXXX)(PORT=2460))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=XXXX))" +
// "(SECURITY=(SSL_SERVER_CERT_DN='C=US,ST=Washington,L=Seattle,O=Amazon.com,OU=RDS,CN=mcsldb01.ckc6ued9hacf.ap-south1.rds.amazonaws.com')));";
using (OracleConnection con = new OracleConnection(strCon))
//using (OracleConnection con = new OracleConnection(#"Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=XXXXXXXX)(PORT=2460)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=XXXX)));User Id=XXXX;Password=XXXXXXXX;"))
//using (OracleConnection con = new OracleConnection(cntn))
{
using (OracleCommand cmd = con.CreateCommand())
{
try
{
//TNS_ADMIN and wallet directory entries can be entered in the app.config file.
con.Open();
Console.WriteLine("Successfully connected to Oracle Autonomous Database");
//Retrieve database version info
cmd.CommandText = "SELECT BANNER FROM V$VERSION";
OracleDataReader reader = cmd.ExecuteReader();
reader.Read();
Console.WriteLine("Connected to " + reader.GetString(0));
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.ReadLine();
}
}
}
Please suggest any solution. Where I am going wrong? Not able to proceed further.
At a guess, it might have been a connection wallet not an SSL wallet that has been provided, ie, just a mechanism of hiding the username and password. If that is the case, the connection would look something like:
new OracleConnection(#"Data Source=NAME_IN_TNSNAMES;User Id=/"))
where NAME_IN_TNSNAMES maps to the entry in the tnsnames.ora file.
Examples of that (from a SQL Plus perspective) here
https://connor-mcdonald.com/2015/09/21/connection-shortcuts-with-a-wallet/
I'm having trouble getting direct manipulation of sessions working properly.
Using some code from the source and a tip from Demis, I've put together something in our unit test client to auth the user and then recover the session.
The AuthResponse I'm getting from the service has a SessionId of 533, which results in a constructed urn of "urn:iauthsession:533", whereas the urn in the Redis cache is "urn:iauthsession:sbQBLwb1WpRj8DqQ7EdL", so obviously, the thing being passed to the urn builder in the running code is not simply the session id (or the overload being used is not what I think it is).
Here's the code we're using in our test base class to try to recover the session from the auth call:
var client = new JsonServiceClient(ServiceTestAppHost.BaseUrl)
{
UserName = userName,
Password = password,
AlwaysSendBasicAuthHeader = true
};
var response = client.Post<AuthResponse>("/auth/basic", new Auth() { UserName = userName, Password = password, RememberMe = true });
var sessionKey = IdUtils.CreateUrn<IAuthSession>(response.SessionId);
var session = _appHost.TryResolve<ICacheClient>().Get<SsoUserSession>(sessionKey);
Any idea why the constructed urn is not matching?
This should now be fixed with this commit which is available in v4.0.22 that's now available on MyGet.
When I call my WEB API from my Console Application, I encounter:
The remote server returned an error: (401) Unauthorized.
This application runs in Interanet (Windows Authentication)
Uri uri = new Uri("http://myServer/api/main/foo");
WebClient client = new WebClient();
client.Credentials = CredentialCache.DefaultCredentials;
using (Stream data = client.OpenRead(uri))
{
using (StreamReader sr = new StreamReader(data))
{
string result = sr.ReadToEnd();
Console.WriteLine(result);
}
}
Updated
If I replace
client.Credentials = CredentialCache.DefaultCredentials;
with this line
client.Credentials = new NetworkCredential( username, password);
it works fine but I need the current credential to be set automatically.
Any idea?
Thanks in advance ;)
You use the default windows credentials here
client.Credentials = CredentialCache.DefaultCredentials;
Specify the credential that you want to authenticate using the following code:
var credential = new NetworkCredential(, , );
serverReport.ReportServerCredentials.NetworkCredentials = credential;
following line is the cause of this behaviour :
client.Credentials = CredentialCache.DefaultCredentials;
Actually this line assigns the credentials of the logged in user or the user being impersonated ( which is only possible in web applications ) , so what I believe is that you have to provide credentials explicitly (http://msdn.microsoft.com/en-us/library/system.net.credentialcache(v=vs.110).aspx) , thanks.
My connection is failing with the following message: "The procedure entry point ons_subscriber_cancelcallback could not be located in the dynamic link library oraons.dll".
Can anyone please help ?
The code is pretty straight forward:
string oradb = "";
oradb = "Data Source=MYORADB;Password=MYPASS123;User ID=MYUSERID;";
OracleConnection conn = new OracleConnection(oradb);
conn.Open();
I have already connected TOAD with these credentials.
For me, the solution was to go to the Oracle website where I downloaded and installed the latest version of the Oracle Data Access Components (ODAC).
You'll want to be careful to install the correct version for your programming environment. In my case, it was version 12c (64-bit).
From there, I redirected the Oracle.DataAccess.dll reference to the version that I'd just installed.
You don't seem to have a database IP or port number there. Once you have those available, try using the Oracle EZCONNECT format:
//Check that MYORADB is your actual SID number
string oradb = getConnectionString("10.1.2.3", 1521, "MYORADB", "MYUSERID", "MYPASS123");
OracleConnection conn = new OracleConnection(oradb);
conn.Open();
private static string getConnectionString(string databaseIP, int databasePort, string databaseSID, string databaseUN, string databasePW)
{
return string.Format(
"Data Source=(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = {0})(PORT = {1}))(CONNECT_DATA =(SID = {2})));" +
"Persist Security Info=True;User ID={3};Password={4}",
databaseIP, databasePort, databaseSID, databaseUN, databasePW
);
}
I want to use Windows current credential when using WMI to query data on a remote machine, but in many examples I found that I have to use Connection object which needs you to provide a username, password and authority for validating username and password as shown below:
Dim connection As New ConnectionOptions
connection.Username = userNameBox.Text
connection.Password = passwordBox.Text
connection.Authority = "ntlmdomain:MyDomain"
Dim scope As New ManagementScope( _
"\\RemoteMachine\root\CIMV2", connection)
scope.Connect()
I want to bypass these inputs and use current Windows logon credentials instead, is there any way for this?
Here' the C# example with connnection options using Windows credentials.
ConnectionOptions connectionOptions = new ConnectionOptions
{
Authentication = AuthenticationLevel.PacketPrivacy,
Impersonation = ImpersonationLevel.Impersonate
};