[Bug] Streaming publication using LCPL file

[KaramYaaqba]

Describe the bug

I am trying to implement streaming for books and audiobooks using the Readium 3.0 toolkit, following the instructions in the documentation (https://github.com/readium/kotlin-toolkit/blob/develop/docs/guides/lcp.md) under the "Streaming an LCP protected package" section. However, I am getting a "Format Not Supported" error, which does not occur when I load the book from the LCPL file instead of streaming:

org.readium.r2.streamer.PublicationOpener$OpenError$FormatNotSupported@c128feb

Here is the code snippet I am using:

`
suspend fun importPublicationFromStorage(uri: Uri) {
// Instantiate the required components.
val context = app.applicationContext.applicationContext
val httpClient = DefaultHttpClient()
val assetRetriever = AssetRetriever(
contentResolver = context.contentResolver,
httpClient = httpClient
)
val publicationOpener = PublicationOpener(
publicationParser = DefaultPublicationParser(
context,
httpClient = httpClient,
assetRetriever = assetRetriever,
pdfFactory = PdfiumDocumentFactory(context)
)
)
val asset =
assetRetriever.retrieve(uri.toAbsoluteUrl()!!).getOrElse {
null
}

    // Open a `Publication` from the `Asset` which is LCPL file in this case.
    val publication = publicationOpener.open(asset!!, allowUserInteraction = true)
        .getOrElse {
            print("error" + it)
                    }

    print("Opened ${publication}")
}

`

How to reproduce?

1- Load the LCPL file using the provided code.
2- An exception will occur when you do so.

Readium version

3.0

Android API version

35

Additional context

No response

[qnga]

Please try to reproduce this on the testapp (I can't do it). I can help you enable LCP support on Slack if you need it.

[qnga]

Note that you don't pass aLcpContentProtection to the PublicationOpener, which is likely to result in a FormatNotSupported error, but that should happen when you open a downloaded book too.

NB: I agree that the documentation is a bit misleading, we'll fix it.

[KaramYaaqba]

@qnga I need your help to enable LCP streaming, what is the best way to connect with you on Slack?

[qnga]

I sent to you instructions on the Readium Slack, as you seem to have access to it.

[hishampro5]

@qnga we are encounter same issue.
We are confused about the error FormatNotSupported why and how can fix it.

[hishampro5]

@KaramYaaqba did you get why this error occur

[KaramYaaqba]

@hishampro5, the first issue in my case is that our backend server does not support the HEAD method. We are fixing it, but until then, we cannot stream publications.

[mickael-menu]

Also don't forget to pass the LCP content protection when initializing the PublicationOpener, otherwise you might get this error as LCP files won't be recognized.

See the documentation for that: https://github.com/readium/kotlin-toolkit/blob/3.0.3/docs/guides/lcp.md#initializing-the-publicationopener

[qnga]

Any update on this?