Please let me know whether there is way to get the IP address of server from it's domain name.
for example:
Domain name is : http://www.gmail.com
then i want api like
public String getIPAddress(String hostname)
{
Some code here
return ipAddress;
}
I am using Blackberry 6 api, which does not have InetAddress class.
I dont think there is an API available in BB
http://supportforums.blackberry.com/t5/Java-Development/is-there-a-way-to-get-the-remote-ip-address-given-its-hostname/td-p/171164
Related
What's the best way to know if my app is running under Kestrel or HTTP.sys. All that I have found so far is to check for "Kestrel" in one of the HttpConext property class names.
Within an MVC controller I can do something like this:
Boolean IsKestrel = HttpContext.Features.GetType().ToString().Contains("Kestrel");
i.e. check this:
Features = {Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.Http1Connection<Microsoft.AspNetCore.Hosting.HostingApplication.Context>}
When using HTTP.sys I only get:
Features = {Microsoft.AspNetCore.Http.Features.FeatureCollection}
(Is "Http" here enough to know that this is HTTP.sys?)
There must be a better way. Is there an obvious property somewhere that contains the name of the host being used?
A broader question might be, how do I know what the builder pattern built?
Update
Found something better, but still looking for a Property that has the server name or type.
In an MVC controller:
var isKestrel = HttpContext.Request.Headers.GetType().ToString().Contains(".Kestrel.");
var isHTTPsys = HttpContext.Request.Headers.GetType().ToString().Contains(".HttpSys.");
At the operating system level, netsh http show servicestate will list all active URLs listening via HTTP.SYS.
From code you can locate an instance of Microsoft.AspNetCore.Hosting.Server.IServer and check what its implementation is, in netcore 6:
Kestrel => Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServerImpl
IIS ==> Microsoft.AspNetCore.Server.IIS.Core.IISHttpServer
HTTP.SYS => Microsoft.AspNetCore.Server.HttpSys.MessagePump
This relies on implementation details (so can break), also other extensions can change these e.g. CoreWcf creates CoreWCF.Configuration.WrappingIServer that wraps one of the above implementations.
you can use System.Diagnostics.Process.GetCurrentProcess().ProcessName
I am not sure whether you want to check this information using the code only or you are just looking for a way to know on which web server your app is running.
In my search result, I found that we could set the ports for a specific web server. When the application will run on that specific web server then it will use that pre-configured port. I am assuming your app also has a similar configuration. You could set the different ports for Kestrel, Http.sys, or IIS. By checking the port number you could say that on which web server your site is running.
You could try to go to the launchSettings.json file in your project where you could configure ports for IIS and Kestral.
Helpful References:
Kestrel Web Server in ASP.NET Core
Understand HTTP.sys Web Server In ASP.NET Core
Hello this is a good question, you question is asking how to find out from inside the code and not from a console.
OOB I did not find anything. So, I had to get very creative to figure this out, sorry for the typo's its brand new stuff...
Option 1:
Since the Kestrel section & endpoints are inside the appsettings.json I used that to find out if its hosted by Kestrel!
//Please create a static class to hold the config.
public static class MyStartupIsItKestrelConfiguration
{
public static IConfiguration Configuration;
public bool static IsKestrel()
{
//check your section kestrel??
var kestrel = configuration.GetSection("Kestrel");
// now check kestrel section or any other section
// see picture for kestrel endpoint in app setting sbelow
return true;
}
}
Now you can access it anywhere and see if you used Kestrel
//Now add it/save it in your startup and access later
public Startup(IConfiguration configuration)
{
Configuration = configuration;
MyStartupIsItKestrelConfiguration.Configuration = configuration;
}
Once you have this
//you can use it in ** YOUR CONTROLLER
MyStartupIsItKestrelConfiguration.IsKestrel();
Option 2:
Please check this public Microsoft.AspNetCore.Http.Features.IFeatureCollection Features { get; }
You can get the features public TFeature? Get<TFeature> (); as a Key Value Pair - and then check the feature for e.g. KESTREL DOES NOT ALLOW PORT SHARING
they split the features namespace in .net core 6 there are breaking changes
You should use the features collection
I used Url data Annotation in MVC as follow:
[Url]
[DisplayName("ULink")]
public string ULink { get; set; }
But some times it does not even allow the code with proper url ; it fails in ModelState.IsValid in the server side giving the following error message.
The Link to ULink field is not a valid fully-qualified http, https, or ftp URL.
Please Suggest
The error message indicates that the URL must be fully-qualified.
I.E. It's missing the HTTP/HTTPS/FTP protocol.
EX: https://www.google.com, not www.google.com.
I have a MVC Controller which exposes a Initialise Action. The other virtual web application hosted on same IIS will need to access this Action.
For security reason, only request coming from same web server (where MVC app is hosted) will need to be granted access to this Iniliase method.
Could someone please help how to achieve this? We can't use localhost to validate as this application will be hosted in Azure which doesn't support locahost requests.
My answer is regarding restricting server-side requests.
The website that calls Initialise would need to make a request to http://www.example.com/controller/Initialise rather than http://localhost/controller/Initialise (replacing www.example.com and controller with your domain and controller names of course).
HttpRequest.IsLocal should be checked in your controller action:
if (!Request.IsLocal)
{
throw new SecurityException();
}
This will reject any requests not coming from the local host. This approach assumes that both the calling site and the requested site share the same IP address - the documentation states that this should work:
The IsLocal property returns true if the IP address of the request originator is 127.0.0.1 or if the IP address of the request is the same as the server's IP address.
For restricting client-side requests Google "csrf mitigation".
If your server has multiple ip addresses, you'll need some extra code. The following handles multiple ip addresses, and handles CDN like cloudflare which will have the wrong ip address in the Request.UserHostAddress property.
Code:
private bool IsLocal()
{
if (Request.IsLocal)
{
return true;
}
string forwardIP = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
foreach (NetworkInterface netInterface in NetworkInterface.GetAllNetworkInterfaces())
{
IPInterfaceProperties ipProps = netInterface.GetIPProperties();
foreach (UnicastIPAddressInformation addr in ipProps.UnicastAddresses)
{
string ipString = addr.Address.ToString();
if (Request.UserHostAddress == ipString || forwardIP == ipString)
{
return true;
}
}
}
return false;
}
Access-Control-Allow-Origin tells the browser regarding its accessibility to domains. Try specifying:
HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", "yourdomain")
I have not tested this to find out if this works.
Use the AntiForgeryToken provided by ASP.NET MVC. Here is an article about that.
http://blog.stevensanderson.com/2008/09/01/prevent-cross-site-request-forgery-csrf-using-aspnet-mvcs-antiforgerytoken-helper/
I think Request.IsLocal is the way to go here. Since you're on using MVC, you could implement a custom attribute to do this for you. See my answer here for a working example
Inside my controller how would i get the base URL.
for example, if my url is:
http://www.mysite.com/MyController/MyAction
I want to have a function that returns :
http://www.mysite.com
I use:
Request.Url.GetLeftPart(UriPartial.Authority);
This is the method i use in my c# application
public static string base_url()
{
return string.Format("{0}://{1}/", HttpContext.Current.Request.Url.Scheme, HttpContext.Current.Request.Url.Authority);
}
Take note that this returns the port also if your development server is using another port other than 80
I need to get Client's Machine ID and their Country in my web application...
Is it possible get succeed in this?
using System.Globalization;
string culture = CultureInfo.CurrentCulture.EnglishName;
string country = culture.Substring(culture.IndexOf('(')
+ 1, culture.LastIndexOf(')') - culture.IndexOf('(')-
Client Country in C#
Get Client Computer Name,
How to get the client machine name from a server
You will get most of the details of
the client machine using the
"Request.ServerVariables"
// Try the following C# code
System.Net.IPHostEntry host = new System.Net.IPHostEntry();
host = System.Net.Dns.GetHostByAddress(Request.ServerVariables["REMOTE_HOST"]);
lbl.Text = host.HostName;
Host name:
Request.ServerVariables["REMOTE_HOST"]
See http://www.w3schools.com/asp/coll_servervariables.asp
Resolve country:
public static RegionInfo ResolveCountry()
{
CultureInfo culture = ResolveCulture();
if (culture != null)
return new RegionInfo(culture.LCID);
return null;
}
from http://madskristensen.net/post/Get-language-and-country-from-a-browser-in-ASPNET.aspx
This uses the PC's setup Language/Country.
By IP try an example at:
http://dotnetguts.blogspot.com/2008/06/finding-country-from-visitors-ip-in.html
Which involves checking the requesting IP adresses against a database of IP locations.
You could also use an IP for a service that already supports this such as:
http://www.ipgeo.com/api/