I am having issues using SSh.net in a UWP App. This app will run on Win10.
I get the following error:
An attempt was made to access a socket in a way forbidden by its access permissions. I have looked online and there is no one actually dealing with this.The exact same code works in a standard Desktop App (WPF)
The key is the key string and I had to replace \r with \n because the PrivateKeyFile creation gave an error message and I tracked this down to carriage return placed instead of new line (by the textbox).
key = key.Replace("\r", "\n");
PrivateKeyFile(stringToStream(key));
client = new SshClient(ip, port, username, pkf);
if (!client.IsConnected)
{
try
{
client.Connect();
connected = true;
}
catch (Exception ex)
{
exception = ex.Message.ToString();
connected = false;
}
}
Finally resolved this issue - Look here: An attempt was made to access a socket in a way forbidden by its access permissions
Go down to the following line:
If you're getting the same error in Windows 8 development, it could be that you haven't enabled access over Private Networks in your Package.appxmanifest file:
Select the Private Networks (Client & Server) option as shown on the image.
Click here for the image
Related
I have a xamarin forms app that uses a (local) web api (using asp.net core) to connect to Sql Server Database.
i tried the demo provided here https://learn.microsoft.com/en-us/aspnet/web-api/overview/advanced/calling-a-web-api-from-a-net-client to make a client api calls but it uses a console app instead of mobile app and it worked fine.
using both Microsoft.AspNet.WebApi.Client
and Newtonsoft.Json Nuget Packages
Xamarin forms client code
client.BaseAddress = new Uri("http://myIP:port/");
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(
new MediaTypeWithQualityHeaderValue("application/json"));
try
{
HttpResponseMessage response = await client.PostAsJsonAsync("api/users", user);
response.EnsureSuccessStatusCode();
return response.IsSuccessStatusCode;
}
catch (Exception ex)
{
Debug.WriteLine("Post Api Exception Msg: " + ex.Message, Class_Name);
return false;
}
and my web-Api code
public IActionResult Post([FromBody] User user)
{
if(!ModelState.IsValid)
{
return BadRequest(ModelState);
}
bool result= repository.Create(user);
if(result)
{
return Ok();
}
else
{
return StatusCode(500);
}
}
and i have tested the api code and it's working fine.
but whenever i try to make calls from my xamarin app
first) i placed a breake point in the web-api code it never gets hit
second) i keep getting the exception
[monodroid-net] --- End of managed Java.Net.SocketException stack trace ---
[monodroid-net] java.net.SocketException: Socket closed
[monodroid-net] at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:394)
[monodroid-net] at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:230)
[monodroid-net] at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:212)
[monodroid-net] at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:436)
[monodroid-net] at java.net.Socket.connect(Socket.java:621)
[monodroid-net] at com.android.okhttp.internal.Platform.connectSocket(Platform.java:145)
[monodroid-net] at com.android.okhttp.internal.io.RealConnection.connectSocket(RealConnection.java:141)
[monodroid-net] at com.android.okhttp.internal.io.RealConnection.connect(RealConnection.java:112)
[monodroid-net] at com.android.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:184)
[monodroid-net] at com.android.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:126)
[monodroid-net] at com.android.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:95)
[monodroid-net] at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:281)
[monodroid-net] at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:224)
[monodroid-net] at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:461)
[monodroid-net] at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:127)
I think it means that there is a problem with the connection socket but I have no idea what the problem is and how to resolve it.
You need change this:
client.BaseAddress = new Uri("http://10.0.2.2:port/");
instead of:
client.BaseAddress = new Uri("http://myIP:port/");
for more information, see the official documentation:
https://learn.microsoft.com/en-us/xamarin/cross-platform/deploy-test/connect-to-local-web-services
In order to access your location machine's web API in the android emulator, you must use the IP 10.0.2.2, see the link below for assistance
https://developer.android.com/studio/run/emulator-networking#networkaddresses
I finally solved the problem by using the Conveyor Extension here is the steps:
open visual studio and select from the tool bar extensions -> manage extension.
in online section search for Conveyor By Keyoti.
after installing the extension restart your Visual studio and it will resume installing.
after that you need to Add a firewall rule for your api to use.
open the windows defender firewall with advanced security form the start menu or type in the search box wf.mfc whatever works for you.
for full steps watch this brief tutorial.
Conveyor: Remote access to IIS Express web application [Updated]
after making all firewall configuration except the part of access over the internet (because in my case both my api and my android device are connected on the same network )
i did not work so i tried this:
5) click on tools -> conveyor allow remote access it will open up this window click on options.
on the far right side there option I clicked on FireWall check to check any issue with the firewall
afterwards it will open a window display the issues with the firewall
and you'll have two option to apply firewall rules automatically or to apply firewall rules manually
I had created the WCF service for file uploading. Its working fine when the service hits from web application or from IOS device. But its throwing an exception when it comes from Android device.
I tried to multiparse the streamdata. Its throwing an exception as like file unavailable.
public OASIS.Entity.Shared.UserFileUpload FileUpload(Stream data, string UploadMode)
{
OASIS.Entity.Shared.UserFileUpload userFileUpload = new Entity.Shared.UserFileUpload();
try
{
MultipartParser parser = new MultipartParser(data);
string fileName = string.Empty;
string filePath = string.Empty;
string allowedExtensions = string.Empty;
int allowedFileSizeMB = 0;
if (parser.FileAvailable)
{
// File Available for IOS / Web application.
// userFileUpload
}
else
{
// From android device file is getting not available.
}
}
catch (Exception exp)
{
OASIS.Utility.ExceptionManager.HandleException(exp);
userFileUpload = null;
}
return userFileUpload;
}
Expecting it should get work for android device too.
By default, WCF does not support form data files, so it looks like you are using MultipartParser to convert form data (data from a file stream uploaded through a form-data).
If this class can handle data submitted in IOS, it should also be able to handle data submitted through forms in Andriod, after all, the HTTP protocol is cross-platform.
thereby I would like to know, how do you upload data in the Andriod system?
By adding breakpoint debugging, can you use this class to parse form data properly?
I suggest you handle the form-data by creating the service with asp.net WebAPI.
https://learn.microsoft.com/en-us/aspnet/web-api/overview/advanced/sending-html-form-data-part-2
Feel free to let me know if there is anything I can help with.
I wrote a 2013/2016 VSTO app for Microsoft Word using C#. My app creates a new toolbar with buttons. One such button runs my app, which launches a basic Windows Form.
Before the user can work with my app, they need to enter information like their license code and email address. My code in turns sends a basic request to my licensing server and awaits a response.
All my code has been running just fine and now it no longer is. Now, when I run the code, I receive the following two error messages:
System.Net.WebException: 'The underlying connection was closed: An
unexpected error occurred on a send.' Inner Exception: IOException:
Unable to read data from the transport connection: An existing
connection was forcibly closed by the remote host.
and
System.Net.WebException: 'The underlying connection was closed: An
unexpected error occurred on a send.' Inner Exception:
SocketException: An existing connection was forcibly closed by the
remote host
I decided to run the code using a standard console app to see if I received the same error message, and sure enough, it worked great! Now I am wondering if Word or the Microsoft VSTO technology is blocking my app from accessing my server.
Here is the code in VSTO that does not work
Note 1: Created a basic 2013/2016 C# VSTO add-in, added a toolbar, and added
Note 2: Added a reference to System.Web.
Note 3: Modified the website link and the query strings as I did not want to publish them on this public forum.
using System;
using Microsoft.Office.Tools.Ribbon;
using System.Web;
using System.Net;
namespace WordAddIn3
{
public partial class Ribbon1
{
private void Ribbon1_Load(object sender, RibbonUIEventArgs e)
{
}
private void button1_Click(object sender, RibbonControlEventArgs e)
{
// Attempt to activate the product using the licensing server on the website.
Console.WriteLine("** ActivateLicense");
//build the url to call the website's software licensing component.
var builder = new UriBuilder("https://validwebsite.com");
builder.Port = -1;
//build the query string.
var query = HttpUtility.ParseQueryString(builder.Query);
query["license_key"] = "validactivationcdode";
query["product_id"] = "validproductid";
query["email"] = "validemailaddress";
builder.Query = query.ToString();
string url = builder.ToString();
Console.WriteLine("activation request:");
Console.WriteLine(url); //display the REST endpoint.
//make the synchronous call to the web service.
var syncClient = new WebClient();
var responseStream = syncClient.DownloadString(url);
Console.WriteLine("Response stream:");
Console.WriteLine(responseStream); //display the server json response.
}
}
}
Here is what is pretty much the same exact code in a console app that does work
Note 1: Created a basic C# console app.
Note 2: Added a reference to System.Web.
Note 3: Modified the website link and the query strings as I did not want to publish them on this public forum. You will receive an error, but that is due to the sample website not having a licensing server.
using System;
using System.Net;
using System.Web;
namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
// Attempt to activate the product using the licensing server on the website.
Console.WriteLine("** ActivateLicense");
//build the url to call the website's software licensing component.
var builder = new UriBuilder("https://validwebsite.com");
builder.Port = -1;
//build the query string.
var query = HttpUtility.ParseQueryString(builder.Query);
query["license_key"] = "validactivationcdode";
query["product_id"] = "validproductid";
query["email"] = "validemailaddress";
builder.Query = query.ToString();
string url = builder.ToString();
Console.WriteLine("activation request:");
Console.WriteLine(url); //display the REST endpoint.
//make the synchronous call to the web service.
var syncClient = new WebClient();
var responseStream = syncClient.DownloadString(url);
Console.WriteLine("Response stream:");
Console.WriteLine(responseStream); //display the server json response.
Console.ReadKey();
}
}
}
Can you help me determine why the code is no longer working in the add-in where it did before (with no code changes)?
I read a lot online and there seem to be too many reasons why this might happen. As an FYI, the website with the licensing server is running. It is (and always has been) a little slow, but when running the code with VSTO, the response is immediate (suggesting no timeout). The Console code runs and there is never a timeout.. I always get a response from the licensing server.
On another thread for a similar problem, someone recommended running WireShark. I am not really familiar with the product, but during my working console run, I received no error messages and instead I got messages like these:
Standard query 0x626a AAAA mywebsite.com
and
Standard query response 0x626a AAAA mywebsite.com
However, if I run the same code in VSTO, I get additional messages that are errors (this one shows up twice):
TCP 60 443 → 50308 [RST, ACK] Seq=1 Ack=125 Win=32768 Len=0
My mobile application is interact with WCF web services i build it in flash builder with Data/Services then put the url in the WSDL services
my issue is if the mobile starts with no internet connection it crashed
the error message in the console
ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
at flash.display::DisplayObjectContainer/getChildIndex()
at mx.managers::SystemManager/http://www.adobe.com/2006/flex/mx/internal::rawChildren_getChildIndex()[E:\dev\4.y\frameworks\projects\framework\src\mx\managers\SystemManager.as:2187]
at mx.managers::SystemRawChildrenList/getChildIndex()[E:\dev\4.y\frameworks\projects\framework\src\mx\managers\SystemRawChildrenList.as:181]
at spark.components.supportClasses::StyleableStageText/getFormIndex()[E:\dev\4.y\frameworks\projects\mobilecomponents\src\spark\components\supportClasses\StyleableStageText.as:1956]
at spark.components.supportClasses::StyleableStageText/findTopmostForm()[E:\dev\4.y\frameworks\projects\mobilecomponents\src\spark\components\supportClasses\StyleableStageText.as:1933]
at spark.components.supportClasses::StyleableStageText/updateProxyImageForTopmostForm()[E:\dev\4.y\frameworks\projects\mobilecomponents\src\spark\components\supportClasses\StyleableStageText.as:2172]
at spark.components.supportClasses::StyleableStageText/commitProperties()[E:\dev\4.y\frameworks\projects\mobilecomponents\src\spark\components\supportClasses\StyleableStageText.as:1510]
at mx.core::UIComponent/validateProperties()[E:\dev\4.y\frameworks\projects\framework\src\mx\core\UIComponent.as:8219]
at mx.managers::LayoutManager/validateClient()
at mx.managers::LayoutManager/validateClient()[E:\dev\4.y\frameworks\projects\framework\src\mx\managers\LayoutManager.as:950]
at mx.managers::PopUpManagerImpl/addPopUp()[E:\dev\4.y\frameworks\projects\framework\src\mx\managers\PopUpManagerImpl.as:382]
at mx.managers::PopUpManager$/addPopUp()[E:\dev\4.y\frameworks\projects\framework\src\mx\managers\PopUpManager.as:193]
at spark.components::SkinnablePopUpContainer/open()[E:\dev\4.y\frameworks\projects\spark\src\spark\components\SkinnablePopUpContainer.as:450]
at debug.ondevice.util::EnterDebugHostIPDialog/show()[/ndepot/fb_46_release_branch/ide_builder/com.adobe.flashbuilder.launching.multiplatform.contributor/utilswcs/src/debug/ondevice/util/EnterDebugHostIPDialog.mxml:47]
at debug.ondevice.util::DebuggerHostInfo$/showIPErrorDialog()[/ndepot/fb_46_release_branch/ide_builder/com.adobe.flashbuilder.launching.multiplatform.contributor/utilswcs/src/debug/ondevice/util/DebuggerHostInfo.as:129]
at mx.netmon::NetworkMonitorImpl/ioErrorHandler()[/ndepot/fb_46_release_branch/ide_builder/com.adobe.flexbuilder.monitors.network/netmonlibrary/src/mx/netmon/NetworkMonitorImpl.as:645]
i want to handle this error with message if no connection
i tried to put condition for internet connection when creation complete
protected function view1_creationCompleteHandler(event:FlexEvent):void
{
monitor = new URLMonitor(new URLRequest('http://www.adobe.com'));
monitor.addEventListener(StatusEvent.STATUS, announceStatus);
monitor.start();
}
public function announceStatus(e:StatusEvent):void {
trace("Status change. Current status: " + monitor.available);
(new AlertMsg()).open(this, false) ;
}
but it doesn't reached if no connection
Note : My target is android
Thanks in advance , for any help
I need to make my CF app self-updating through the web service.
I found one article on MSDN from 2003 that explains it quite well. However, I would like to talk practice here. Anyone really done it before or does everyone rely on third party solutions?
I have been specifically asked to do it this way, so if you know of any tips/caveats, any info is appreciated.
Thanks!
This is relatively easy to do. Basically, your application calls a web service to compare its version with the version available on the server. If the server version is newer, your application downloads the new EXE as a byte[] array.
Next, because you can't delete or overwrite a running EXE file, your application renames its original EXE file to something like "MyApplication.old" (the OS allows this, fortunately). Your app then saves the downloaded byte[] array in the same folder as the original EXE file, and with the same original name (e.g. "MyApplication.exe"). You then display a message to the user (e.g. "new version detected, please restart") and close.
When the user restarts the app, it will be the new version they're starting. The new version deletes the old file ("MyApplication.old") and the update is complete.
Having an application update itself without requiring the user to restart is a huge pain in the butt (you have to kick off a separate process to do the updating, which means a separate updater application that cannot itself be auto-updated) and I've never been able to make it work 100% reliably. I've never had a customer complain about the required restart.
I asked this same question a while back:
How to Auto-Update Windows Mobile application
Basically you need two applications.
App1: Launches the actual application, but also checks for a CAB file (installer). If the cab file is there, it executes the CAB file.
App2: Actual application. It will call a web service, passing a version number to the service and retrieve a URL back if a new version exists (). Once downloaded, you can optionally install the cab file and shut down.
One potiencial issue: if you have files that one install puts on the file system, but can't overwrite (database file, log, etc), you will need two separate installs.
To install a cab: look up wceload.exe http://msdn.microsoft.com/en-us/library/bb158700.aspx
private static bool LaunchInstaller(string cabFile)
{
// Info on WceLoad.exe
//http://msdn.microsoft.com/en-us/library/bb158700.aspx
const string installerExe = "\\windows\\wceload.exe";
const string processOptions = "";
try
{
ProcessStartInfo processInfo = new ProcessStartInfo();
processInfo.FileName = installerExe;
processInfo.Arguments = processOptions + " \"" + cabFile + "\"";
var process = Process.Start(processInfo);
if (process != null)
{
process.WaitForExit();
}
return InstallationSuccessCheck(cabFile);
}
catch (Exception e)
{
MessageBox.Show("Sorry, for some reason this installation failed.\n" + e.Message);
Console.WriteLine(e);
throw;
}
}
private static bool InstallationSuccessCheck(string cabFile)
{
if (File.Exists(cabFile))
{
MessageBox.Show("Something in the install went wrong. Please contact support.");
return false;
}
return true;
}
To get the version number: Assembly.GetExecutingAssembly().GetName().Version.ToString()
To download a cab:
public void DownloadUpdatedVersion(string updateUrl)
{
var request = WebRequest.Create(updateUrl);
request.Credentials = CredentialCache.DefaultCredentials;
var response = request.GetResponse();
try
{
var dataStream = response.GetResponseStream();
string fileName = GetFileName();
var fileStream = new FileStream(fileName, FileMode.CreateNew);
ReadWriteStream(dataStream, fileStream);
}
finally
{
response.Close();
}
}
What exactly do you mean by "self-updating"? If you're referring to configuration or data, then webservices should work great. If you're talking about automatically downloading and installing a new version of itself, that's a different story.
Found this downloadable sample from Microsoft- looks like it should help.
If you want to use a third-party component, have a look at AppToDate developed by the guys at MoDaCo.