B4J Question OkHttp - HTTP/2 support

[JanPRO]

Hi,

Http/2 is supported by OkHttp.

However, when I request the following test api: https://http2.pro/api/v1 I get the result, that HTTP/2 is not supported. So my question now, does the latest B4J OkHttp library really support HTTP/2?

Jan

 

[KMatle]

Your exact code?

 

[JanPRO]

Hi,

it's just a simple Get request:

Sub TestHttp2
    Dim H As HttpJob
    H.Initialize("",Me)
    H.Download("https://http2.pro/api/v1")
    
    Wait For (H) JobDone(J As HttpJob)
    
    Log(J.GetString)
End Sub

Jan

 

[inakigarm]

Hi,

it's just a simple Get request:

Sub TestHttp2
    Dim H As HttpJob
    H.Initialize("",Me)
    H.Download("https://http2.pro/api/v1")
  
    Wait For (H) JobDone(J As HttpJob)
  
    Log(J.GetString)
End Sub

Jan

You'll have to use http source class modules ("HttpJob.bas" "HttpUtils2Service.bas") not the jokhttputils library () and in the "HttpUtils2Service.bas" change the hc initialization to

hc.InitializeAcceptAll("hc")

(source modules: https://www.b4x.com/android/forum/t...putils2-httputils2-source-code.82632/#content

hc.InitializeAcceptAll skips the certificate verification step

With that, this is the result:

   Dim H As HttpJob
   H.Initialize("",Me)
   H.Download("https://http2.pro/api/v1")
  
   Wait For (H) JobDone(J As HttpJob)
   If J.Success Then
       Log(J.GetString)
   Else
       Log(J.ErrorMessage)
   End If

{"http2":0,"protocol":"HTTP\/1.1","push":0,"user_agent":"okhttp\/3.5.0"}

See also: https://www.b4x.com/android/forum/t...liente-to-server-using-ssl.94727/#post-599293

 

[JanPRO]

Thank you, but I don't have any problem with the SSL certificate.
This question is about the protocol used by OkHttp. In your response

{"http2":0,"protocol":"HTTP\/1.1","push":0,"user_agent":"okhttp\/3.5.0"}

you can see that Http 1.1 was used, when you open the Api url in a modern browser you will see that the value for http2 becomes 1.

Jan

 

[DonManfred]

Based on this SO.
best is to use java 9 i guess. But i don´t know if that helps.

 

[inakigarm]

This question is about the protocol used by OkHttp.

Yes, I mirsread your first post ;-)

 

[DonManfred]

I just searched for java 9 and realized that b4j can work with openjava 11
See https://www.b4x.com/b4j.html#installation

I just configured my b4j (V7.0) to use the open java 11. and tried the code above

    Dim H As HttpJob
    H.Initialize("",Me)
    H.Download("https://http2.pro/api/v1")
 
    Wait For (H) JobDone(J As HttpJob)
    If J.Success Then
        Log(J.GetString)
    Else
        Log(J.ErrorMessage)
    End If

This is the result:

{"http2":1,"protocol":"HTTP\/2.0","push":1,"user_agent":"okhttp\/3.5.0"}

As a fazit i would suggest to switch to OpenJDK 11

 

[JanPRO]

Awesome, thank you very much DonManfred