I want to detect default browser of android inside my MVC controller.
I have mobile detection right now:
public ActionResult Index()
{
if (WurflHelper.Instance.IsMobile(Request.UserAgent))
{
return View("MobileView");
}
else
{
return View();
}
}
How can i detect android default browser (not chrome). I need UserAgent parameters matches for this detection.
Thanks for advice.
--------------EDIT--------------------------------------------------------------
i found this solution for client (javascript) : How to detect the stock Android browser. I need same solution for asp.net MVC
I noticed that you are already using WURFL to detect the device. You could simply use the mobile_browser or advertised_mobile_browser capability to determine the browser of the device.
You can use this Request.Browser to get the browser info. Below is an example
var moo = Request.Browser;
var Name = moo.Browser;
var Version = moo.Version;
var Major_Version = moo.MajorVersion;
var Minor_Version = moo.MinorVersion;
Related
I'm trying to get a string (UserID) using Preferences.Get (Xamarin.Essentials) on a PushNotification.Extension project, but as the Preferences.Set happens in the Xamarin iOS project, I'm always getting an empty string in the extensions project.
Is there a way to share this preference between the iOS project and the iOS.extension?
public string UserID
{
get
{
return Preferences.Get(nameof(UserID), UserIDDefault);
}
set
{
Preferences.Set(nameof(UserID), value);
}
}
According to Apple docs , please follow the steps to enable data-sharinig .
Enable App Groups Capabilities , refer to App Group Capabilities in Xamarin.iOS.
Add the app to the App Group .
Use NSUserDefaults and init it with the name of the extension bundle identifier.
//Save
var defaults = new NSUserDefaults(#"com.example.domain.MyShareExtension");
defaults.SetString("value","Mykey");
defaults.Synchronize();
//Get
var defaults = new NSUserDefaults(#"com.example.domain.MyShareExtension");
var value = defaults.ValueForKey("Mykey");
"NSUserDefaults(string)" does not work for me.
In the Xamarin iOS documentation this constructor is marked as deprecated! see https://learn.microsoft.com/en-us/dotnet/api/foundation.nsuserdefaults?view=xamarin-ios-sdk-12
But when I use "NSUserDefaults(String, NSUserDefaultsType)" it runs perfect.
I need some advice.
I found this ShazamApi project that uses NAudio. I need this project to work in Xamarin Forms (Android), but I don't know what to use instead of NAudio to make it work on Android. Someone would know how to do it. Thanks a lot.
Specifically, I have a problem with this code.
https://github.com/AlekseyMartynov/shazam-for-real/blob/master/Program.cs
https://github.com/AlekseyMartynov/shazam-for-real/blob/master/Analysis.cs
public void ReadChunk(ISampleProvider sampleProvider)
{
if(sampleProvider.Read(WindowRing, WindowRingPos, CHUNK_SIZE) != CHUNK_SIZE)
throw new Exception();
ProcessedSamples += CHUNK_SIZE;
if(ProcessedSamples >= WINDOW_SIZE)
AddStripe();
}
WasapiLoopbackCapture capture = new WasapiLoopbackCapture();
var captureBuf = new BufferedWaveProvider(capture.WaveFormat);
capture.DataAvailable += (s, e) =>
{
captureBuf.AddSamples(e.Buffer, 0, e.BytesRecorded);
};
capture.StartRecording();
using (var resampler = new MediaFoundationResampler(captureBuf, new WaveFormat(Analysis.SAMPLE_RATE, 16, 1)))
{
var sampleProvider = resampler.ToSampleProvider();
var retryMs = 3000;
var tagId = Guid.NewGuid().ToString();
while (true)
{
while (captureBuf.BufferedDuration.TotalSeconds < 1)
Thread.Sleep(100);
analysis.ReadChunk(sampleProvider);
if (analysis.StripeCount > 2 * LandmarkFinder.RADIUS_TIME)
finder.Find(analysis.StripeCount - LandmarkFinder.RADIUS_TIME - 1);
if (analysis.ProcessedMs >= retryMs)
{
var sigBytes = Sig.Write(Analysis.SAMPLE_RATE, analysis.ProcessedSamples, finder);
var result = ShazamApi.SendRequest(tagId, analysis.ProcessedMs, sigBytes).GetAwaiter().GetResult();
if (result.Success)
return result;
retryMs = result.RetryMs;
if (retryMs == 0)
return result;
}
}
}
but I don't know what to use instead of NAudio to make it work on
Android.
In xamarin forms, you can use Xamarin Community Toolkit MediaElement to achieve this function.
MediaElement is a view for playing video and audio. Media that's supported by the underlying platform can be played from the following sources:
The web, using a URI (HTTP or HTTPS).
A resource embedded in the platform application, using the
ms-appx:/// URI scheme.
Files that come from the app's local and temporary data folders,
using the ms-appdata:/// URI scheme.
The device's library.
There is also a official sample here: Xamarin Community Toolkit - MediaElement.
Note:
In android, you can also try Android Audio. The Android OS provides extensive support for multimedia, encompassing both audio and video.
We all know that IE11 detection does not work with server side languages because Microsoft has removed the IE/MSIE browser indication and now is fully "Mozilla".
I also know that doing browser detection/version is risky but has served us all well in the past.
some requirements for a website are things like:
must work with certain version of firefox and above
must work with certain version of chrome and above
must work with certain version of safari's (some below and some newer)
must work with IE >= 8
so here is the problem... IE11 indicates on my list that it is not supported. I want to support it from the web side of things on the server (ASP.NET/MVC)
it is not clear exactly how to detect this from the server side. Does anyone know how?
this is the user agent now being shown in IE 11:
"Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko"
rv:11.0 tells us its IE11 however doing a parse on that will still mean that for example, it could be chrome of a certain version that is not supported in such a requirement or even firefox.
so, what is the best way here to see if it is indeed IE 11 or higher?
I am not so sure about searching from "Trident" and onwards because I don't know if other browsers use that or not.
any direction is welcomed.
Use a Regular Expression like:
Regex.IsMatch(this.Request.UserAgent, #"Trident/7.*rv:11")
Trident is the name of the rendering engine IE uses. Some other applications also use the Trident engine, as you can see in the Wikipedia article. But it shouldn't be a problem to search for Trident in the User Agent, since no other major browsers use Trident.
Only IE11 uses Trident version 7 so if you search for Trident/7 with the regex, it should find IE11.
To maintain compatibility with existing code, I created a custom provider so Request.Browser will return the information as expected. For example, Browser.Browser will be "IE" not "InternetExplorer", which is the new value after the hotfix is installed.
Additionally, this approach returns the actual version of IE, not version 7 when in compatibility view. Note that Browser.Type will return "IE7" when in compatibility view in case you need to detect it, or you could easily modify the custom provider to change .Type as well.
The approach is simple. Derive a class from HttpCapabilitiesDefaultProvider and set BrowserCapabilitiesProvider to an instance of your class.
In Global.asax.cs:
protected void Application_Start(Object sender, EventArgs e)
{
...
HttpCapabilitiesBase.BrowserCapabilitiesProvider = new CustomerHttpCapabilitiesProvider();
...
}
Define your class: UPDATED TO INCLUDE MICROSOFT EDGE BROWSER
public class CustomerHttpCapabilitiesProvider : HttpCapabilitiesDefaultProvider
{
public override HttpBrowserCapabilities GetBrowserCapabilities(HttpRequest request)
{
HttpBrowserCapabilities browser = base.GetBrowserCapabilities(request);
// Correct for IE 11, which presents itself as Mozilla version 0.0
string ua = request.UserAgent;
// Ensure IE by checking for Trident
// Reports the real IE version, not the compatibility view version.
if (!string.IsNullOrEmpty(ua))
{
if (ua.Contains(#"Trident"))
{
if (!browser.IsBrowser(#"IE"))
{
browser.AddBrowser(#"ie");
browser.AddBrowser(#"ie6plus");
browser.AddBrowser(#"ie10plus");
}
IDictionary caps = browser.Capabilities;
caps[#"Browser"] = #"IE";
// Determine browser version
bool ok = false;
string majorVersion = null; // convertable to int
string minorVersion = null; // convertable to double
Match m = Regex.Match(ua, #"rv:(\d+)\.(\d+)");
if (m.Success)
{
ok = true;
majorVersion = m.Groups[1].Value;
minorVersion = m.Groups[2].Value; // typically 0
}
else
{
m = Regex.Match(ua, #"Trident/(\d+)\.(\d+)");
if (m.Success)
{
int v;
ok = int.TryParse(m.Groups[1].Value, out v);
if (ok)
{
v += 4; // Trident/7 = IE 11, Trident/6 = IE 10, Trident/5 = IE 9, and Trident/4 = IE 8
majorVersion = v.ToString(#"d");
minorVersion = m.Groups[2].Value; // typically 0
}
}
}
if (ok)
{
caps[#"MajorVersion"] = majorVersion;
caps[#"MinorVersion"] = minorVersion;
caps[#"Version"] = String.Format(#"{0}.{1}", majorVersion, minorVersion);
}
}
else if (ua.Contains(#"Edge"))
{
if (!browser.IsBrowser(#"Edge"))
{
browser.AddBrowser(#"edge");
}
IDictionary caps = browser.Capabilities;
caps[#"Browser"] = #"Edge";
// Determine browser version
Match m = Regex.Match(ua, #"Edge/(\d+)\.(\d+)");
if (m.Success)
{
string majorVersion = m.Groups[1].Value;
string minorVersion = m.Groups[2].Value;
caps[#"MajorVersion"] = majorVersion;
caps[#"MinorVersion"] = minorVersion;
caps[#"Version"] = String.Format(#"{0}.{1}", majorVersion, minorVersion);
}
}
}
return browser;
}
}
I solved this by using the Regex below after having a knock out system to check what browser is being used to access the site.
in this case, even if the browser "IE" is checked and returns false, I go ahead and use this regex and check to see if it is a match against the user agent:
(?:\b(MS)?IE\s+|\bTrident\/7\.0;.*\s+rv:)(\d+)
I hope this helps someone. I tested it and works fine. I also changed the rv to be 12 and upwards, and it works fine too in case if in IE12, they change rv to be 12.
public ActionResult Index()
{
var browser = this.Request.Browser;
System.Diagnostics.Trace.WriteLine(browser.Browser); // InternetExplorer
System.Diagnostics.Trace.WriteLine(browser.MajorVersion); // 11
return View();
}
Please note that you need .NET 4.5 or .NET 4.0 with http://support.microsoft.com/kb/2836939/en-us installed to correctly detect IE11.
It does sound like you are whitelisting browsers, which is not a good idea. You really need to do client-side detection of capabilities instead, generally. MVC really does not know what browser it is, the Request.Browser object can give you some idea, but that is not really reliable, which is the case for IE 11. It tells me version 11 on my dev machine, but 7 on my server, which can be a catastrophic mistake.
I build Single Page Applications and have adopted a similar attitude as Google about only supporting the current and previous version of a browser only. When I detect an outdated browser I server a 'core' site that is just some basic CSS and markup, no JavaScript. It is just easier that way, makes development so much easier.
Anyway the way I detect is to test for the current versions of IE like so:
public static bool IsModernIE() {
return HttpContext.Current.Request.Browser.Browser == "InternetExplorer";
}
It is an HTML helper method. So in your cshtml you can use the test. In my controller I call the individual version tests. This is ultimately a very fragile way to do it. I am basically drawing a line in the sand between modern IE (10/11) and old IE (9-). This test could be irrelevant with the next version and I have not tested against say Xbox One yet.
I have a library I use, posted on GitHub. I would call it usable Alpha right now, so take it for that and run with it if you like. I want to make the tests more externally configurable, etc. here is the URL for the repository, https://github.com/docluv/SPAHelper. I actually use it on my Blog, http://love2dev.com.
I'm developing a website with asp.net, visual studio 2012, IIS8, .Net Framework 4.
I use SESSIONS to store user information after login.
when user click sign in button, I send information to .ashx file like this:
var url = "SignIn.ashx?username=" + UserName.value + "&password=" + PassWord.value;
xmlRequest_SignIn.open("GET", url);
xmlRequest_SignIn.onreadystatechange = function () { ApplyUpdateSignIn() }
xmlRequest_SignIn.send(null);
SignIn.ashx:
... // check login information and then
HttpContext.Current.Session["UserName"] = username.toString();
...
Now in every page of my website, I check this session to authenticate the user in ajax:
var url = "CheckMemberAccount.ashx";
xmlRequest_member.open("GET", url);
xmlRequest_member.onreadystatechange = function () { ApplyUpdateGetMemberAccount() }
xmlRequest_member.send(null);
CheckMemberAccount.ashx:
if (Convert.ToString(HttpContext.Current.Session["UserName"]) == "" || null == HttpContext.Current.Session["UserName"])
{
// user not logged in
}
else
{
// user logged in
}
For log out I use ajax too:
var url = "SignOut.ashx";
xmlRequest_SignOut.open(GET, url);
xmlRequest_SignOut.onreadystatechange = function () { ApplyUpdateSignOut() }
xmlRequest_SignOut.send(null);
SignOut.ashx:
// I try everything to make the session null or invalid!
// BUT it doesn't take effect in Internet Explorer !!
HttpContext.Current.Session["UserName"] = "";
HttpContext.Current.Session["UserName"] = null;
HttpContext.Current.Session.Clear();
HttpContext.Current.Session.RemoveAll();
HttpContext.Current.Session.Abandon();
HttpContext.Current.Request.Cookies["ASP.NET_SessionId"].Value = "";
As you can see I've tried everything to make session null or invalid.
This code works well in all browsers(Chrome, FireFox, Safari, Opera, Netscape, ...) EXCEPT in Internet Explorer !
In IE after Signing out, when I check the member acount with CheckMemberAccount.ashx file, the session still remain valid with valid value as if no sign out happened !
This problem is only in IE !!
note that IE settings are all in their defaults.
I have tried Global.asax:
After adding the class, and without adding any code to it ( just keep it unchanged with it's default functions such as Session_Start() ), My problem changed and now I always get null for the session in CheckMemberAccount.ashx ! and again the problem is just in IE !
I didn't find any solution after 3 days.
I'll appreciate any help :)
I believe the checkmemberaccount call is being cached in the browser by iE. this has gotten me in trouble many times before. Add a random variable to your Ajax call and I believe your problem will be solved.
You can verify this by using a tool like fiddler. You should see that the browser is caching the GET request. You could also switch from a GET to a POST. POSTS are not cached by IE.
By the way... You should fix this for any get requests that you don't want to cache.
I'm looking for a way to find the status of a live stream through a VideoDisplay (or any other method really). I am interested to know if the stream is currently being published to or if the publisher has stopped. This is for a Flex/Flash ActionScript 3 project.
Is there a way to do this or is this ANOTHER oversight by adobe?
flex flash adobe adobe-flex actionscript
I've only found one solution, and that's using the NetStream object in combination with a video control.
The video control must be manually added to an
nsListen = new NetStream(nc);
nsListen.addEventListener(NetStatusEvent.NET_STATUS, nsListenHandler);
nsListen.play(streamname);
var v:Video = new Video();
v.attachStream(nsListen);
uicontrol.add(v);
Finally, the event status is returned in nsListenHandler:
private function nsListenHandler(e:Event):void
{
if(e is NetStatusEvent)
{
var nse:NetStatusEvent = NetStatusEvent(e);
if(nse.info.code == "NetStream.Play.Failed")
{
// Big error.
}
if(nse.info.code == "NetStream.Play.PublishNotify")
{
// Stream has just been published
}
if(nse.info.code == "NetStream.Play.UnpublishNotify")
{
// Stream has just been unpublished
}
trace(NetStatusEvent(e).info.code);
trace(NetStatusEvent(e).info.description);
}
}
Only this code wont do is tell you if a stream is already successfully being published to.
You can dig into NetStatusEvent events.
Check this live docs