Develop Reference

Get notification origin in windows 10 uwp?

I'm writing a uwp app with notification listener and I'm trying to get the origin of a notification (like Google Chrome and the website it came from).
I tried using the AppInfo.DisplayInfo for a UserNotification but I can't get it to print the info, and I'm not sure if this is the right way to do this.
IReadOnlyList<UserNotification> notifs = await MainPage.listener.GetNotificationsAsync(Windows.UI.Notifications.NotificationKinds.Toast);
UserNotification n = notifs.Last();
var name = n.AppInfo.DisplayInfo.DisplayName;
I expected name to be the name of the app the notification came from but it seems to be empty or just not working. To be precise from a notification like this:
I want to extract the "Google Chrome" and / or "www.reddit.com".

Hopefully you have found a solution by now, but in case this helps anyone:
The notification doesn't know that your message is coming from a browser. The whole Windows notifications system doesn't take that into an account. Windows receives a UserNotification from an application, which in your case happens to be a browser. So your "origin" is the application "Google Chrome". Your best shot is to try and get the link from inside the notification itself, if it is inside the body somewhere.
I really think you should be able to find the link inside the text of the notification, but I would need more information on what exactly you are receiving to be sure. If you want to know how to read the text of the notification, do:
string appName = notif.AppInfo.DisplayInfo.DisplayName; //this will get you "Google Chrome"
NotificationBinding toastBinding = notif.Notification.Visual.GetBinding(KnownNotificationBindings.ToastGeneric);
if (toastBinding != null)
{
IReadOnlyList<AdaptiveNotificationText> textElements = toastBinding.GetTextElements();
string titleText = textElements.FirstOrDefault()?.Text;
string bodyText = string.Join("\n", textElements.Skip(1).Select(t => t.Text));
string website = ParseWebsiteFromText(bodyText); //my guess is the info you want is in here
}
From there you have to parse the information you want, if it's available.
If you want to know more, I suggest reading the documentation from here: https://learn.microsoft.com/en-us/windows/uwp/design/shell/tiles-and-notifications/notification-listener.

Simplified LDAP/AD Server on C#

I've searched without much success to the simplest (and yet working) example of an LDAP/AD Server for C#. Many libraries exist to connect to LDAP servers, but not the LDAP Server by itself (on C#).
I found however some information about it and even a post requesting a simple LDAP server that was answered "LDAP isn't simple"; and yet i read a lot of the RFC4511 and this sample code at GitHub Flexinet LDAP Server, but unfortunatly i don't have yet the knowledge to complete it's code.
My goal is not to make a fully functional LDAP server, but one that can at least do:
Serve as a login pool for softwares that allow it's users to be
registered and log on a AD/LDAP server (just check for login and
password for authentication).
Allow softwares like Outlook and Thunderbird to get a list of users (without passwords) with first and last name, e-mail address, phone number and department for contact list model.
No delete, add (or create), move, and other
functions are required since the main software that i aim to
integrate it with will do all the user and group management.
UPDATE
I'm trying to implement the Flexinet sample and adjust to that functionalities; as form of a question what should i do to change this function to prevent it from causing an exception (on the "var filter = searchRequest.ChildAttributes[6];" line it always breaks) when i call from a LDAP client software:
private void HandleSearchRequest(NetworkStream stream, LdapPacket requestPacket)
{
var searchRequest = requestPacket.ChildAttributes.SingleOrDefault(o => o.LdapOperation == LdapOperation.SearchRequest);
var filter = searchRequest.ChildAttributes[6];
if ((LdapFilterChoice)filter.ContextType == LdapFilterChoice.equalityMatch && filter.ChildAttributes[0].GetValue<String>() == "sAMAccountName" && filter.ChildAttributes[1].GetValue<String>() == "testuser") // equalityMatch
{
var responseEntryPacket = new LdapPacket(requestPacket.MessageId);
var searchResultEntry = new LdapAttribute(LdapOperation.SearchResultEntry);
searchResultEntry.ChildAttributes.Add(new LdapAttribute(UniversalDataType.OctetString, "cn=testuser,cn=Users,dc=dev,dc=company,dc=com"));
searchResultEntry.ChildAttributes.Add(new LdapAttribute(UniversalDataType.Sequence));
responseEntryPacket.ChildAttributes.Add(searchResultEntry);
var responsEntryBytes = responseEntryPacket.GetBytes();
stream.Write(responsEntryBytes, 0, responsEntryBytes.Length);
}
var responseDonePacket = new LdapPacket(requestPacket.MessageId);
responseDonePacket.ChildAttributes.Add(new LdapResultAttribute(LdapOperation.SearchResultDone, LdapResult.success));
var responseDoneBytes = responseDonePacket.GetBytes();
stream.Write(responseDoneBytes, 0, responseDoneBytes.Length);
}
The code is on the github link.

Finally i made a fork of the Flexinet LDAP Server on #Sammuel-Miranda/LdapServerLib and with the author's support and some changes and adaptations i completed this implementation. It responds to the bind and search calls and works perfectly for Outlook and Thunderbird to use as a shared address book.
I did not implemente however any ADD/MODIFY/DELETE request (but would not be hard to do) since i don't need then.

I found on the RFC4511 the explanation on how the search works ... and i'm "kind" of understanding it, not very well - and i see that the method implemented on the GitHub from Flexinet LDAP Server only answer to bind and search requests of one single user (since it's only a example implementation).
The client is requesting diferent calls to verify capabilities, structure and other info before making the search request itself. So i'll implement it all, one by one.
Still, if any other lib (in C#) exists, and anyone know about, would be better than writing a hole new server. If my implementation works, i'll fork it on github and share.

How can I make a windows app in C# that for example automatically follows someone on Twitter when I open it up?

If I were to follow USA Today on Twitter with a JavaScript code I could go to their page and paste this simple code in the console:
follow();
function follow(){
var button = document.getElementsByClassName("EdgeButton EdgeButton--secondary EdgeButton--medium button-text follow-text")[0];
button.click();
}
How can I trigger this code on a specific URL in C# (only after the page loaded)?
So what I'm trying to ask is how can I trigger a button in C# remotely, without actually visiting the page?
So it could be a simple console application too where I simply
string jsCode = "follow();
function follow(){
var button = document.getElementsByClassName("EdgeButton EdgeButton--secondary EdgeButton--medium button-text follow-text")[0];
button.click();
}";
string url = "https://twitter.com/";
List<string> pagesToFollow = new List<string>();
pagesToFollow.Add("USATODAY");
pagesToFollow.Add("RT_America");
pagesToFollow.Add("Reuters");
foreach (var s in pagesToFollow) whateverMethodGoesHere(url + s, jsCode);
This is pretty much what the app would look like but I have no idea how to execute a JavaScript code remotely and I yet to find a solution to the problem that the code should wait until the page is loaded.

Considering it a general question as you request, a general answer would be something like this:
Use a proxy, like Fiddler, and study the HTTP requests done while performing the task you want to emulate. Then, replay the requests from your program.
Embed a headless browser like Chromium and control it from your code.
Use Selenium. There is a binding package in NuGet.
... and many more, I suppose. This question is really open to speculation.

Minecraft 1.6.2 Custom Launcher

I am making a launcher for Minecraft. 1.6.2 changed a lot, so the way you login is different. If any of you have any knowledge of logging into minecraft using C#, I would appreciate it.
wClient.DownloadString("http://login.minecraft.net/?user=" + strUsername + "&password=" + strPassword + "&version=13");
I believe this used to be a valid way of doing it, but I am not quite sure anymore. Help is appreciated, thanks.

In reply to TheUnrealMegashark's comments to Rhys Towey's Answer. I have been working really hard to get it to launch, but. Its throwing me off a bit. The very next update will include a 1.6 fix. Just got to figure it out.
The proper answer to your question is that the web link that fetches the Session is still currently in use. Nothing new there.
Beware! You must know that your
"http://login.minecraft.net/?user=" + strUsername + "&password=" +
strPassword + "&version=13"
Is unsafe. It sends the password of the user through the internet in plain text. it can be subject to "Man in the Middle" attacks.
One of the proper ways to encrypt the connection is to use HTTPS with POST. Using POST, I avoid sending all of the data in the request URL and send the data through POST. Using HTTPS, I encrypt any data sent after the request URL returns. HTTPS makes POST encrypted, thus removing "Man in the Middle" attacks.
You can use GET with HTTPS and it still be secure (from what i have read). But, it is considered an unsafe practice. Although it is safe in all accounts between your computer and the connected device, anywhere else it might be seen and be subject to "Man behind you Attack". What I mean is that when you send this URL, it is possible for your computer to record the URL in some sort of history, or, display it in an address bar in plain text. Although, sense your not making a web browser and the URL is not displayed, this could possibly all be forgotten.
But, If it were me, I would still play it safe and just use the safer strategy.
To use HTTPS with POST.
Here is a sample of code i use in my "AtomLauncher." This code will send the POST data to the URL and return a string. Goto http://www.minecraftwiki.net/wiki/Minecraft.net to get more info on the string that is returned.
string mcURLData = "Error";
using (WebClient client = new WebClient()) // Get Data from Minecraft with username and password
{
// This a Text control for my Program, ignore this commented line if you wish.
// this.Invoke(new MethodInvoker(delegate { homeLabelTop.Text = "Connecting to Minecraft.net..."; }));
try
{
System.Collections.Specialized.NameValueCollection urlData = new System.Collections.Specialized.NameValueCollection();
urlData.Add("user", "UserName");
urlData.Add("password", "MYPa22w0rd");
urlData.Add("version", "13");
byte[] responsebytes = client.UploadValues("https://login.minecraft.net", "POST", urlData);
mcURLData = Encoding.UTF8.GetString(responsebytes);
}
catch
{
if (!System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable())
{
mcURLData = "Internet Disconnected.";
}
else
{
mcURLData = "Can't connect to login.minecraft.net.";
}
}
}
To use HTTPS with GET
just simply change the
http
in your code to
https
In other news.
I have fixed my code. Feel free (when its uploaded) to use it.
For your information, you need to know that when 1.6.X launches it creates a natives folder of which it starts using immediately. What I have done to fix this was to run 1.6.2 and copy the natives folder it created and removed the number.
Created "version/1.6.2/1.6.2-natives-###"
Copied it to "version/1.6.2/1.6.2.natives"
Point my program to "natives" folder I created.
What I'll end up doing in the future is automatically checking for the natives folder and if it doesn't exist, I'll have it download natives from the internet.
(I would love to know where minecraft is getting its current natives so i can essentially do the same thing. Unless, what it does is download it from the internet every time it launches. If true, that's kind of ugly. Seeing as I have bandwidth usage limits.)

Facebook "fan gate" with C#/asp.net

The problem is that 1) Facebook seems so fluid with how it allows developers to interact with it (FBML, iFrame, different versions of SDKs) and 2) Everything I find is either PHP or Javascript and I have NO experience with those. What I am trying to do seems sooo simple, and I can't believe there isn't an easy way to do this.
What I have:
I used Visual Studio 2010 to create a simple web application (asp.net/C#) that asks the user for some info (first name, last name, email, etc.). I have a button on there called "Submit" that, when clicked, saves the entered data into a database. I have this hosted on GoDaddy (I know, I know...heh) and it works just fine. No problem here.
I created a "Facebook App" that uses the iFrame thingy so that basically I have a new tab on Facebook that displays my web app mentioned above. This works fine too. The tab is there, the web app is there, and users can enter the data and it is saved to the database. No problem here.
What I WANT:
I want the web app (the thing displayed by the facebook app) to only show the data entry part if the user currently "likes" the facebook entity. I DO NOT want to have to ask permission. I just want to know if they are a fan of the company's facebook "page" that has this app. So I need two things here, shown in my pseudo code below:
Part 1 (check if user is already a fan):
If (user is fan)
{
Show data entry area (unhide it)
}
else
{
Show "Click the like button to see more options"
}
Part 2 (listen for "like" event)
WhenLikeButtonPressed()
{
Show data entry area (unhide it)
}
I've seen stuff about "visible to connection", C# sdk, edge.create, etc. but I just can't make heads or tails of it. I don't mind putting in Javascript or PHP if someone could please give me exact, "Fan Gate for Dummies" steps. Please, I'm going crazy over here :-(

The key is is the signed_request that Facebook posts to your app when the user accesses the page. It contains the data on whether or not the user likes the page. You shouldn't need to worry about catching edge events on an actual tab FB page as it get's reloaded when the user likes/unlikes the page.
You'll need to decode the signed request with your app secret to get the like info. There are examples provided for PHP but I'm sure with a little google help you can find decode info for the signed_request for asp.net/c#.
Here's the php decode for reference:
function parse_signed_request($signed_request, $secret) {
list($encoded_sig, $payload) = explode('.', $signed_request, 2);
// decode the data
$sig = base64_url_decode($encoded_sig);
$data = json_decode(base64_url_decode($payload), true);
if (strtoupper($data['algorithm']) !== 'HMAC-SHA256') {
error_log('Unknown algorithm. Expected HMAC-SHA256');
return null;
}
// check sig
$expected_sig = hash_hmac('sha256', $payload, $secret, $raw = true);
if ($sig !== $expected_sig) {
error_log('Bad Signed JSON signature!');
return null;
}
return $data;
}
function base64_url_decode($input) {
return base64_decode(strtr($input, '-_', '+/'));
}
and the link https://developers.facebook.com/docs/authentication/signed_request/ the like info will be contained in the page variable