Android Question How to Authenticate only Android user to visit web site

cenyu

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Hello, i have a task to create web site with MSSQL database and ASP.NET C# MVC but this site MUST be accessable only from users with my B4A app and not accessable from web browsers and other phones with different IMEI...
I can use HttpJob like this code to receive data or entire web page and send username password and Phone IMEI
B4X: 
    Public appUrl1 As String = appServer & "/page1/__USERNAME__/__PASSWORD__/_PHONEIMEI__"

    Dim job3 As HttpJob
    job3.Initialize("JobLogin", Me)
    job3.Download(appUrl1)
OR

B4X: 
Dim Web as WebView
Web.LoadURL(appUrl1 )

But my biggest concern is: IF USER WRITE THIS URL DIRECTLY TO BROWSER IT WILL ACCESS SITE.
User MUST load site ONLY from WebView into my B4A app
How to protect site? Any answer will be useful for me!
 
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JohnC

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WebviewExtras2 is not a different version of webview, it just adds "extra" features to the existing webview.

It is highly recommended that you post details or the code of the solution so other members can learn from the issue in this thread.

So, what function of webview extras did you use specifically that fixed this issue?
 
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A

annitb

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there is a single tcp packet knock knock utility on entware(ng)...you send a packet from the app and only then is the perfectly normal web server port available for a perfectly standard http request...just saying...since a browser cannot send that tcp packet, only your android app users will be able to access that website...say for html apps or the like..
 
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JohnC

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OK, I see you posted your solution at this location:

Webview ssl problem

Hello guys, i am having problems with a url with ssl certificate, i try with Ctrl + B, HU2_ACCEPTALL and only get a white screen. Thank you in advance! Regards
www.b4x.com

So, there was an SSL problem, and you are using Webviewextras2 to ignore the SSL error.

I wanted to post this solution so other forum members can learn.
 
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cenyu

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How can i help you?
 
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JohnC

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You didn't post the code that solved the problem you were having in this thread.

So, I just wanted to update this thread with the same solution you posted in another thread.

This way members reading this thread can see your solution in the other thread.
 
Last edited:
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cenyu

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Longtime User
You have to download lib from http://b4a.martinpearman.co.uk/webviewextras/

Then use this code to load https web page:
B4X: 
Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.

    Private WebView1 As WebView
    Private we As WebViewExtras


End Sub

Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    Activity.LoadLayout("Layout1")

    we.Initialize(WebView1)
    Dim client As DefaultWebViewClient
    client.Initialize("client")
    we.SetWebViewClient(client)
    WebView1.LoadUrl("https://192.168.0.200/")


End Sub

Sub client_ReceivedSslError(SslErrorHandler1 As SslErrorHandler, SslError1 As SslError)
    Log(SslError1)
    SslErrorHandler1.Proceed
End Sub

The Sub client_ReceivedSslError is very important! Without this sub nothings work!
 
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