Android Question HttpServer library how use Https

Lello1964 · Dec 3, 2020

Hi,
I am using the HttpServer library to communicate with a web application,
I would like to know how to use the Https protocol with an SSLcertificate.

Raffaele

aeric · Dec 3, 2020

Which OS are you running for the server?

For Ubuntu:

[Server] Using Let's Encrypt on Ubuntu VPS

#1 How to: Install Let's Encrypt on Ubuntu Linux VPS to Create SSL Certificates Downloading and Installing Let's Encrypt 1. Update the server's packages apt-get update & sudo apt-get upgrade 2. Install the GIT package apt-get install git 3. Download a clone of Let's Encrypt from the GitHub...

www.b4x.com

There are other threads in this forum using Windows and other paid SSL. Just do a search.

Lello1964 · Dec 3, 2020

I use the library in an android app to receive requests and send information via Https.

Erel · Dec 3, 2020

It is not possible. The library doesn't support it.

Star-Dust · Dec 5, 2020

@Erel do you think that by purchasing this library you can create a HTTP server with ssl?

Android™ SSL Server Example

Erel · Dec 6, 2020

No need to purchase anything. HttpServer is a simplified version of jServer (which does support SSL). With some work it can be added, however as we have an excellent tool to create powerful http servers (B4J), which can run on small RPis if needed, I don't see a strong need for an Android http server.
Use MQTT instead.

Star-Dust · Dec 6, 2020

Thanks Erel, maybe in the moment of slowdown of the work I will try to add it. But more for a challenge with oneself than for a real need.

Lello1964 · Dec 6, 2020

Star-Dust said:
Thanks Erel, maybe in the moment of slowdown of the work I will try to add it. But more for a challenge with oneself than for a real need.

?

Star-Dust · Dec 9, 2020

Erel said:
With some work it can be added

Such as? Give us a hint to get started

Erel · Dec 10, 2020

See how it is implemented in jServer: https://github.com/AnywhereSoftware/B4J/tree/master/Libs_Server/src/anywheresoftware/b4j/object

Star-Dust · Dec 10, 2020

Erel said:
See how it is implemented in jServer: https://github.com/AnywhereSoftware/B4J/tree/master/Libs_Server/src/anywheresoftware/b4j/object

Many thanks @Erel, I hope to be able

Star-Dust · Dec 11, 2020

Erel said:
No need to purchase anything. HttpServer is a simplified version of jServer (which does support SSL).

@Erel forgive that I return to this topic and if it is the case to open a new thread tell me.

In the jServer Library (B4J) the instance of the Server class (org.eclipse.jetty.server.Server) is created with the Initialize method. Before starting the server, you can add the SSL connector.
It can also be done not using the SetSslConfiguration command, but with JavaObject since the Server class is public.

In the HTTPServer library (B4A) the instance of the Server class is created with the START method and inside it the connector is inserted and the server started. So adding an SSL connector before or after the start would generate an error.
In any case it would not be possible to use the addConnector command because Server is a private variable, so I cannot use it with JavaObject.

So what do you advise me?
Unfortunately it is the best I can do in Java and it is already a lot for my poor language skills

OliverA · Dec 12, 2020

Star-Dust said:
Server is a private variable

Use the Reflection library instead of JavaObject when trying to access private variables

Star-Dust · Dec 12, 2020

OliverA said:
Use the Reflection library instead of JavaObject when trying to access private variables

I tried but without success. But I'm not sure I used it correctly

Lello1964 · Dec 12, 2020

Only Erel can help us.

OliverA · Dec 12, 2020

Maybe try this (I used the code below with the HttpServer example):

B4X:

    server.Initialize("Server")
    server.Start(port)
    Dim r As Reflector
    r.Target = server
    r.Target = r.GetField("server")    'Get private server object
    Log($"toString output: ${r.RunMethod("toString")}"$) 'Just to show we got the private server object
    Log("Stopping server via private server object")
    r.RunMethod("stop") 'Stop server
    'Maybe now can set up SSL
    Log("Starting server via private server object")
    r.RunMethod("start") 'Restart server after setting up SSL

Leaving SSL to someone else

Star-Dust · Dec 12, 2020

OliverA said:

Maybe try this (I used the code below with the HttpServer example):

B4X:

    server.Initialize("Server")
    server.Start(port)
    Dim r As Reflector
    r.Target = server
    r.Target = r.GetField("server")    'Get private server object
    Log($"toString output: ${r.RunMethod("toString")}"$) 'Just to show we got the private server object
    Log("Stopping server via private server object")
    r.RunMethod("stop") 'Stop server
    'Maybe now can set up SSL
    Log("Starting server via private server object")
    r.RunMethod("start") 'Restart server after setting up SSL

Leaving SSL to someone else

Already tried. In this way it says the field does not exist.
Have you tried this code?

OliverA · Dec 12, 2020

Star-Dust said:
Have you tried this code?

Yes

OliverA · Dec 12, 2020

Note: You have to use HttpServer's start method first before you can properly access the underlying server object (it is not created until then).

Star-Dust · Dec 12, 2020

I need to start it myself.
Why do I have to plug in the connector before starting it.
Actually I should also create a Server instance and then insert the SSL connector.

Inside the Start of httpserver.Start does everything together. I need to do something similar to rewriting the httpserver Start method.

Here's more or less what I should do:

B4X:

Public Sub SetupSSL
    Dim r As Reflector
    r.Target = server
    Dim O As Object = r.GetField("server")    'Get private server object
    
    Dim J As JavaObject = Me
    j.RunMethod("active_ssl", Array(o))
End Sub

#If Java
import org.eclipse.jetty.http.ssl.SslContextFactory;
import org.eclipse.jetty.server.ssl.*;
import org.eclipse.jetty.server.*;
import org.eclipse.jetty.util.resource.Resource;

    public void active_ssl(Server jserver){
        //jserver = new Server();
        Resource keystore = Resource.newClassPathResource("/server.jks");
        if (keystore != null && keystore.exists()) {
            //connector.setConfidentialPort(8443);
            SslContextFactory factory = new SslContextFactory();
            factory.setKeyStoreResource(keystore);
            factory.setKeyStorePassword("xxxxx");
            factory.setTrustStore(keystore);
            factory.setKeyManagerPassword("xxxxx");
            SslSocketConnector sslConnector = new SslSocketConnector(factory);
            sslConnector.setMaxIdleTime(5000);
            sslConnector.setPort(8443);
            sslConnector.setAcceptors(4);
            jserver.addConnector(sslConnector);
            System.out.println("SSL access to the quickstart has been enabled on port 8443");
            System.out.println("You can access the application using SSL on https://localhost:8443");
            System.out.println();
            //jserver.start();
        }
    }
#End If

This code must be after the Server variable / class is instantiated, but before the Server variable is started

Android Question HttpServer library how use Https

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