B4J Question b4j does not open an https ssl site, what to do?

Xfood · May 13, 2025

Good morning,
and for 2 days I've been trying to open this site from b4j with webview, I've tried all the possible settings found on the forum, but the page doesn't open, could someone check why?
Thanks
WebView1.LoadURL("https://cloud.profimax.it")

DonManfred · May 13, 2025

it is not related to b4j.

The site does not open in a webbrowser too.

Xfood · May 13, 2025

DonManfred said:
it is not related to b4j.

The site does not open in a webbrowser too.

with chrome it opens, or any other web browser

Cableguy · May 13, 2025

I can confirm it opens in Edge
*

Cableguy · May 13, 2025

This may be of help:

Webview & Certificate Lets encrypt

Hello, i will open an SSL Page witch has a Let's encrypt Certificate but nothing happens if i load : webview1.LoadUrl("https://www.siam-net.de") or webview1.LoadUrl("https://smarthome.iokz.de") nothing happens.. no error... no page .. nothing if i load...

www.b4x.com

Xfood · May 13, 2025

Cableguy said:
This may be of help:

Webview & Certificate Lets encrypt

Hello, i will open an SSL Page witch has a Let's encrypt Certificate but nothing happens if i load : webview1.LoadUrl("https://www.siam-net.de") or webview1.LoadUrl("https://smarthome.iokz.de") nothing happens.. no error... no page .. nothing if i load...

www.b4x.com

I also tried this example, but it doesn't work in my case

stevel05 · May 13, 2025

I can open my web site that is encrypted using Let's Encrypt with a B4j Webview, Let's encrypt is not the specific cause. That's not to say that it's configuration or integration with something else on the page is not causing it.

Sagenut · May 13, 2025

Did you try changing the Webview UserAgent?
Check here
https://www.b4x.com/android/forum/threads/change-webview-useragent.146442/post-928470

Xfood · May 13, 2025

Sagenut said:
Did you try changing the Webview UserAgent?
Check here
https://www.b4x.com/android/forum/threads/change-webview-useragent.146442/post-928470

this line is not compatible for b4j
Dim wvs As WebViewSettings

Daestrum · May 13, 2025

Possibly

B4X:

YourWebView.As(JavaObject).RunMethodJO("getEngine",null).RunMethod("setUserAgent",Array("my webview"))

(not tested)

Xfood · May 14, 2025

Daestrum said:
Possibly

B4X:

YourWebView.As(JavaObject).RunMethodJO("getEngine",null).RunMethod("setUserAgent",Array("my webview"))

(not tested)

unfortunately it doesn't work,
I tried your suggestion like this

B4X:

WebView1.As(JavaObject).RunMethodJO("getEngine",Null).RunMethod("setUserAgent",Array("WebView1"))
WebView1.LoadURL("https://cloud.profimax.it/")

I tried it like this too, but it doesn't work

B4X:

    WebView1.As(JavaObject).RunMethodJO("getEngine",Null).RunMethod("setUserAgent",Array("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.246"))
    WebView1.LoadURL("https://cloud.profimax.it/")

the page remains blank

DonManfred · May 14, 2025

Xfood said:
with chrome it opens, or any other web browser

not here

Xfood · May 14, 2025

DonManfred said:
not here

I don't know, with any browser it always opens here

tchart · May 14, 2025

Daestrum said:
Possibly

B4X:

YourWebView.As(JavaObject).RunMethodJO("getEngine",null).RunMethod("setUserAgent",Array("my webview"))

(not tested)

What JRE/JDK are you running?

A few years back my application stopped working with a site as the site switched to their certificates to the Google CA which wasn’t in JRE store. Updating the JRE resolved the issue.

Java has a list of trusted CA (certificate authorities) which can become out of date.

TILogistic · May 14, 2025

test.

B4X:

    #PackagerProperty: VMArgs = --add-opens java.base/sun.security.ssl=b4j
    #PackagerProperty: IncludedModules = jdk.crypto.ec

B4X:

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    SetSystemProperty("jdk.tls.client.protocols","TLSv1,TLSv1.1,TLSv1.2")
    SetSystemProperty("deployment.security.TLSv1.2","true")
    SetSystemProperty("https.protocols","TLSv1.2")
'    MainForm.Show
    Dim PagesManager As B4XPagesManager
    PagesManager.Initialize(MainForm)
End Sub

Xfood · May 14, 2025

TILogistic said:

test.

B4X:

    #PackagerProperty: VMArgs = --add-opens java.base/sun.security.ssl=b4j
    #PackagerProperty: IncludedModules = jdk.crypto.ec

B4X:

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    SetSystemProperty("jdk.tls.client.protocols","TLSv1,TLSv1.1,TLSv1.2")
    SetSystemProperty("deployment.security.TLSv1.2","true")
    SetSystemProperty("https.protocols","TLSv1.2")
'    MainForm.Show
    Dim PagesManager As B4XPagesManager
    PagesManager.Initialize(MainForm)
End Sub

View attachment 164049

Thank you, I'm out now, tonight I'll try and let you know

Sagenut · May 14, 2025

It looks like it's unable to make a first sort of redirect.
Using the already complete URL

B4X:

https://cloud.profimax.it/auth/realms/Profimax/protocol/openid-connect/auth?client_id=website&redirect_uri=https%3A%2F%2Fcloud.profimax.it%2Fit&state=9643d1a9-ec3e-46bc-a6d6-fe696b77d6bc&response_mode=fragment&response_type=code&scope=openid&nonce=afec59d6-cf23-458a-af9f-d462b9c34628&code_challenge=wTOlLqgyerZ5mH1J1TWwhjc9hfmZT3gQpI0ly3BqggA&code_challenge_method=S256

it works

But I understand that it's not the desired result and that maybe the url can change from session to session.

Xfood · May 14, 2025

Sagenut said:
It looks like it's unable to make a first sort of redirect.
Using the already complete URL

B4X:

https://cloud.profimax.it/auth/realms/Profimax/protocol/openid-connect/auth?client_id=website&redirect_uri=https%3A%2F%2Fcloud.profimax.it%2Fit&state=9643d1a9-ec3e-46bc-a6d6-fe696b77d6bc&response_mode=fragment&response_type=code&scope=openid&nonce=afec59d6-cf23-458a-af9f-d462b9c34628&code_challenge=wTOlLqgyerZ5mH1J1TWwhjc9hfmZT3gQpI0ly3BqggA&code_challenge_method=S256

it works
View attachment 164053
But I understand that it's not the desired result and that maybe the url can change from session to session.

That's right, why does this happen?

Sagenut · May 14, 2025

Xfood said:
That's right, why does this happen?

Unluckily I am not so skilled to understand why.

Xfood · May 14, 2025

TILogistic said:

test.

B4X:

    #PackagerProperty: VMArgs = --add-opens java.base/sun.security.ssl=b4j
    #PackagerProperty: IncludedModules = jdk.crypto.ec

B4X:

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    SetSystemProperty("jdk.tls.client.protocols","TLSv1,TLSv1.1,TLSv1.2")
    SetSystemProperty("deployment.security.TLSv1.2","true")
    SetSystemProperty("https.protocols","TLSv1.2")
'    MainForm.Show
    Dim PagesManager As B4XPagesManager
    PagesManager.Initialize(MainForm)
End Sub

View attachment 164049

just tried it, unfortunately it doesn't work,
there's a blank page

B4J Question b4j does not open an https ssl site, what to do?

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