I not sure how to check whether the server, i plan to accessing is online or existed using xpages javascript.
Below i always check my database is exist or not. but not server. Is there a way to check server is online/existed?
var svr:string = getComponent("MailSvr").getValueAsString();
var dbpath:string = getComponent("MailLoc").getValueAsString();
var db:NotesDatabase = session.getDatabase(svr, dbpath, false);
if (db == null) {
return false;
} else {
return true;
}
Check for the names.nsf on the server. The names.nsf should always be available and accessible, if the server is accessible.
Related
I have a NodeJS project on 2 Google Cloud instances behind a load-balancer. I'm using socket.io. I want to share the sessions between the instances.
Usually developers doing it using socket.io-redies, but I don't want redis just for that. I have Cloud SQL (Aka: MySQL), and I want to use MySQL for sharing the sessions.
I have understand the whole index.js of the redis adapter file, except this function:
https://github.com/socketio/socket.io-redis/blob/master/index.js#L93
Redis.prototype.onmessage = function(channel, msg){
var args = msgpack.decode(msg);
var packet;
if (uid == args.shift()) return debug('ignore same uid');
packet = args[0];
if (packet && packet.nsp === undefined) {
packet.nsp = '/';
}
if (!packet || packet.nsp != this.nsp.name) {
return debug('ignore different namespace');
}
args.push(true);
this.broadcast.apply(this, args);
};
If I need to get events from the MySQL (subscribe) I think it is not possible. Am I right?
Do you know another solution of sharing socket.io between two machines, without using Redis?
I have two hubs in a web role,
1) external facing hub meant to be consumed over https external endpoint for website users.
2) intended to be connected to over http on an internal endpoint by worker roles.
I would like the ability to secure access to the hubs somehow.
Is there anyway I can check to see what connection type the connecting user/worker role is using and accept/deny based on this?
Another method I thought of was perhaps using certificate authentication on the internal hubs but i'd rather not have to for speed etc.
GlobalHost.DependencyResolver.UseServiceBus(connectionString, "web");
// Web external connection
app.MapSignalR("/signalr", new HubConfiguration()
{ EnableJavaScriptProxies = true, EnableDetailedErrors = false });
// Worker internal connection
app.MapSignalR("/signalr-internal", new HubConfiguration()
{ EnableJavaScriptProxies = false, EnableDetailedErrors = true});
EDIT: I've included my own answer
A simple solution you can use roles of client to distinguish between to connections
object GetAuthInfo()
{
var user = Context.User;
return new
{
IsAuthenticated = user.Identity.IsAuthenticated,
IsAdmin = user.IsInRole("Admin"),
UserName = user.Identity.Name
};
}
also other options are fully described here
I ended up probing the request environment variables and checking the servers localPort and request scheme in a custom AuthorizeAttribute. The only downside to this at the moment is that the javascript proxies will still generate the restricted hub info. But i'm working on that :).
I'll leave the question open for a bit to see if anyone can extend on this.
public class SignalrAuthorizeAttribute : Microsoft.AspNet.SignalR.AuthorizeAttribute, Microsoft.AspNet.SignalR.IDependencyResolver
{
public override bool AuthorizeHubConnection(Microsoft.AspNet.SignalR.Hubs.HubDescriptor hubDescriptor, Microsoft.AspNet.SignalR.IRequest request)
{
bool isHttps = request.Environment["owin.RequestScheme"].ToString().Equals("https", StringComparison.OrdinalIgnoreCase) ? true : false;
bool internalPort = request.Environment["server.LocalPort"].ToString().Equals("2000") ? true : false;
switch(hubDescriptor.Name)
{
// External Hubs
case "masterHub":
case "childHub":
if (isHttps && !internalPort) return base.AuthorizeHubConnection(hubDescriptor, request);
break;
// Internal hubs
case "workerInHub":
case "workerOutHub":
if (!isHttps && internalPort) return base.AuthorizeHubConnection(hubDescriptor, request);
break;
default:
break;
}
return false;
}
}
I've set up a development server with AD and I'm trying to figure out how to connect to it via .NET. I'm working on the same machine that AD is installed on. I've gotten the DC name from AD, and the name of the machine, but the connection just does not work. I'm using the same credentials I used to connect to the server.
Any suggestions?
DirectoryEntry directoryEntry = new DirectoryEntry("LDAP://[dc.computername.com]", "administrator", "[adminpwd]");
Can you connect to the RootDSE container?
DirectoryEntry rootDSE = new DirectoryEntry("LDAP://RootDSE", "administrator", "[adminpwd]");
If that works, you can then read out some of the properties stored in that root container
if (rootDSE != null)
{
Console.WriteLine("RootDSE Properties:\n\n");
foreach (string propName in rootDSE.Properties.PropertyNames)
{
Console.WriteLine("{0:-20d}: {1}", propName, rootDSE.Properties[propName][0]);
}
}
This will show you some information about what LDAP paths are present in your installation.
Try something like this, using the System.DirectoryServices.Protocols namespace :
//Define your connection
LdapConnection ldapConnection = new LdapConnection("123.456.789.10:389");
try
{
//Authenticate the username and password
using (ldapConnection)
{
//Pass in the network creds, and the domain.
var networkCredential = new NetworkCredential(Username, Password, Domain);
//Since we're using unsecured port 389, set to false. If using port 636 over SSL, set this to true.
ldapConnection.SessionOptions.SecureSocketLayer = false;
ldapConnection.SessionOptions.VerifyServerCertificate += delegate { return true; };
//To force NTLM\Kerberos use AuthType.Negotiate, for non-TLS and unsecured, use AuthType.Basic
ldapConnection.AuthType = AuthType.Basic;
ldapConnection.Bind(networkCredential);
}
catch (LdapException ldapException)
{
//Authentication failed, exception will dictate why
}
}
I have a worker role in my hosted service.
The worker is sending e-mail daily bases.
But in the hosted service, there are 2 environment, Staging and Production.
So my worker role sends e-mail 2 times everyday.
I'd like to know how to detect if the worker is in stagning or production.
Thanks in advance.
As per my question here, you'll see that there is no fast way of doing this. Also, unless you really know what you are doing, I strongly suggest you not do this.
However, if you want to, you can use a really nice library (Azure Service Management via C#) although we did have some trouble with WCF using it.
Here's a quick sample on how to do it (note, you need to include the management certificate as a resource in your code & deploy it to Azure):
private static bool IsStaging()
{
try
{
if (!CloudEnvironment.IsAvailable)
return false;
const string certName = "AzureManagement.pfx";
const string password = "Pa$$w0rd";
// load certificate
var manifestResourceStream = typeof(ProjectContext).Assembly.GetManifestResourceStream(certName);
if (manifestResourceStream == null)
{
// should we panic?
return true;
}
var bytes = new byte[manifestResourceStream.Length];
manifestResourceStream.Read(bytes, 0, bytes.Length);
var cert = new X509Certificate2(bytes, password);
var serviceManagementChannel = Microsoft.Toolkit.WindowsAzure.ServiceManagement.ServiceManagementHelper.
CreateServiceManagementChannel("WindowsAzureServiceManagement", cert);
using (new OperationContextScope((IContextChannel)serviceManagementChannel))
{
var hostedServices =
serviceManagementChannel.ListHostedServices(WellKnownConfiguration.General.SubscriptionId);
// because we don't know the name of the hosted service, we'll do something really wasteful
// and iterate
foreach (var hostedService in hostedServices)
{
var ad =
serviceManagementChannel.GetHostedServiceWithDetails(
WellKnownConfiguration.General.SubscriptionId,
hostedService.ServiceName, true);
var deployment =
ad.Deployments.Where(
x => x.PrivateID == Zebra.Framework.Azure.CloudEnvironment.CurrentRoleInstanceId).
FirstOrDefault
();
if (deployment != null)
{
return deployment.DeploymentSlot.ToLower().Equals("staging");
}
}
}
return false;
}
catch (Exception e)
{
// if something went wrong, let's not panic
TraceManager.AzureFrameworkTraceSource.TraceData(System.Diagnostics.TraceEventType.Error, "Exception", e);
return false;
}
}
If you're using an SQL server (either Azure SQL or SQL Server hosted in VM), you could stop the Staging worker role from doing work by only allowing the public IP of the Production instance access to the database server.
What is the best way to record statistics on the number of visitors visiting my site that have set their browser to block ads?
Since programs like AdBlock actually never request the advert, you would have to look the server logs to see if the same user accessed a webpage but didn't access an advert. This is assuming the advert is on the same server.
If your adverts are on a separate server, then I would suggest it's impossible to do so.
The best way to stop users from blocking adverts, is to have inline text adverts which are generated by the server and dished up inside your html.
Add the user id to the request for the ad:
<img src="./ads/viagra.jpg?{user.id}"/>
that way you can check what ads are seen by which users.
You need to think about the different ways that ads are blocked. The first thing to look at is whether they are running noscript, so you could add a script that would check for that.
The next thing is to see if they are blocking flash, a small movie should do that.
If you look at the adblock site, there is some indication of how it does blocking:
How does element hiding work?
If you look further down that page, you will see that conventional chrome probing will not work, so you need to try and parse the altered DOM.
AdBlock forum says this is used to detect AdBlock. After some tweaking you could use this to gather some statistics.
setTimeout("detect_abp()", 10000);
var isFF = (navigator.userAgent.indexOf("Firefox") > -1) ? true : false,
hasABP = false;
function detect_abp() {
if(isFF) {
if(Components.interfaces.nsIAdblockPlus != undefined) {
hasABP = true;
} else {
var AbpImage = document.createElement("img");
AbpImage.id = "abp_detector";
AbpImage.src = "/textlink-ads.jpg";
AbpImage.style.width = "0";
AbpImage.style.height = "0";
AbpImage.style.top = "-1000px";
AbpImage.style.left = "-1000px";
document.body.appendChild(AbpImage);
hasABP = (document.getElementById("abp_detector").style.display == "none");
var e = document.getElementsByTagName("iframe");
for (var i = 0; i < e.length; i++) {
if(e[i].clientHeight == 0) {
hasABP = true;
}
}
if(hasABP == true) {
history.go(1);
location = "http://www.tweaktown.com/supportus.html";
window.location(location);
}
}
}
}
I suppose you could compare the ad prints with the page views on your website (which you can get from your analytics software).