Hello. So I am doing a simple webview implementati...

# compose-android

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Hello. So I am doing a simple webview implementation for a payment system and I am trying to manually handle the redirects. I am checking the url when it changes, so that I can act accordingly. However when I try to access the url?.host, when I debug it. I see
"NOT CACHED" as the message. I absolutely don't know what this means and no information from the internet seems to help. I will drop an SS of my implementation and my webview settings below

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Screenshot 2025-03-28 at 7.31.07 PM.png

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settings.apply {
                        javaScriptEnabled = true
                        javaScriptCanOpenWindowsAutomatically = true
                        domStorageEnabled = true
                        cacheMode = WebSettings.LOAD_NO_CACHE
                    }

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my webview settings

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The host returns "NOT CACHED" string thereby making my if check to not get through

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Does this have to do with webview implementation or how the url is handled by the server?

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I mean like, front end interface

[Chiranjeevi Pandey]

https is a scheme so the current code will not work. host would be example.com only. Refer to this image for more.

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I see, so I should make use of http instead of https?

[Chiranjeevi Pandey]

Nope, I mean url?.host will return only “example.com” in your case which won’t match with “https://example.com” which you are trying to match. In the pic that I sent above, you can see what is the format of host and other different component of uri as well. Refer to this image and make conditional check based on that.

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Yeah, I will do that

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But the issue is that url.host doesn't even return that. I placed a debugger at the if check, just before it runs and when I check the url?.host, I see NOT CAHCHED, even the scheme says the same thing

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So even if I do the correct conditional check, the code might still not work

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Should I show a picture of my debugger to explain better?

[Chiranjeevi Pandey]

NOT CACHED means probably the line hasn’t run yet. Put the breakpoint on next line and hover to the url?.host. That might work.

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Okay let me try that

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Thank you very much. It does work. I guess all this time, I was getting it wrong. But then again I guess the paystack documentation was kind of misleading in that aspect, because that is what I was following actually

[Chiranjeevi Pandey]

Might be, afaik, if it’s a variable and has already been evaluated once, the result would be cached and would be shown when hovered. Can you paste the link to documentation that you are following?

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Here it is

https://paystack.com/docs/guides/using_the_paystack_checkout_in_a_mobile_webview/#handling-webview-redirects

I do think you are right with your explanation

[Chiranjeevi Pandey]

yeah, looks like the docs need correction. maybe it is safe to use contains() . For eg: url?.toString()?.contains(callbackUrl) or startsWith() should work as well.

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I see. Thanks. But the url?.host isn't bad too right?

[Chiranjeevi Pandey]

Yeah, we can only compare host as well here.