Solved: microsoft.identitymode.tokens.audienceurivalidationfailedexception in iOS App – Open OneDrive Document in WKWebView

If you’re reading this, chances are you’re stuck with an annoying issue in your iOS app where you’re unable to open a OneDrive document in a WKWebView. The error message is cryptic, and Google searches yield nothing but frustration. Fear not, dear developer, for we’ve got the solution right here!

The Error: microsoft.identitymode.tokens.audienceurivalidationfailedexception

The error message `microsoft.identitymode.tokens.audienceurivalidationfailedexception was thrown while trying to open One Drive document in WKWebView in iOS app` is quite a mouthful, isn’t it? But what does it even mean? In simple terms, it means that the OneDrive API is complaining about the audience URI validation failing. Yes, it’s a mouthful, but don’t worry, we’ll break it down for you.

What’s an Audience URI?

In the context of Azure Active Directory (AAD) and OneDrive, an audience URI is the identifier for the resource you’re trying to access. In this case, it’s the OneDrive document you want to open in your WKWebView. Think of it as the “who” you’re trying to talk to. When you request access to the document, the OneDrive API checks if the audience URI is valid and if your app has the necessary permissions. If it’s not valid, you get the `audienceurivalidationfailedexception`. Simple, right?

Why is this Happening?

There are a few reasons why you might be experiencing this issue:

• Incorrect Audience URI: You might have hardcoded the audience URI or it’s not correctly configured in your Azure AD app registration.
• Missing Permissions: Your app might not have the necessary permissions to access the OneDrive document.
• Token Issues: The authentication token might be invalid, expired, or not properly generated.
• WKWebView Configuration: The WKWebView might not be properly configured to handle the OneDrive document request.

The Solution

Now that we’ve identified the possible causes, let’s dive into the solution. Follow these steps to resolve the `microsoft.identitymode.tokens.audienceurivalidationfailedexception` issue:

Step 1: Verify Audience URI

Double-check that your audience URI is correctly configured in your Azure AD app registration. You can find it in the Azure portal under Azure Active Directory > App registrations > Your App > Overview > Endpoints. Look for the `audience` value.

https://login.microsoftonline.com/{tenantId}/v2.0

Replace `{tenantId}` with your actual tenant ID. This should match the `audience` value in your app registration.

Step 2: Configure OneDrive Permissions

Make sure your app has the necessary permissions to access the OneDrive document. In the Azure portal, navigate to Azure Active Directory > App registrations > Your App > API permissions. Add the following permissions:

• Files.Read
• Files.Read.All
• Sites.Read.All

Grant the necessary consent for your app to access the OneDrive document.

Step 3: Generate a Valid Authentication Token

Use the Microsoft Authentication Library (MSAL) to generate a valid authentication token. You can use the following code snippet:

import MSAL

let scopes = ["https://graph.microsoft.com/.default"]
let clientId = "your_client_id"
let redirectUri = "your_redirect_uri"

let application = try MSALPublicClientApplication(clientId: clientId, redirectUri: redirectUri)
let webViewParameters = MSALWebviewParameters(authenticationPresentationHint: .selectAccount)

let interactiveRequest = try application.acquireTokenSilent(scopes: scopes) { (result, error) in
    if let error = error {
        // Handle error
    } else if let result = result {
        // Use the access token to access the OneDrive document
        let accessToken = result.accessToken
        // ...
    }
}

Step 4: Configure WKWebView

Set up your WKWebView to handle the OneDrive document request. Use the following code snippet:

import UIKit
import WebKit

class OneDriveWebView: UIViewController, WKNavigationDelegate {
    let webView = WKWebView()

    override func viewDidLoad() {
        super.viewDidLoad()
        webView.navigationDelegate = self
        webView.uiDelegate = self
        webView.configuration процессualDelegate = self

        let documentUrl = URL(string: "https://onedrive.live.com/_layouts/15/onedrive.aspx?id={documentId}&select=id,thumbnails,createdBy,url,folderWebUrl")!
        webView.load(URLRequest(url: documentUrl))
    }

    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
        // Handle navigation action
    }
}

Troubleshooting Tips

If you’re still experiencing issues, try the following:

• Check the Azure AD app registration for any typos or incorrect configurations.
• Verify that the OneDrive document ID is correct and the document exists.
• Use a token debugger like jwt.io to inspect the authentication token and ensure it’s valid.
• Enable logging in your app to capture more detailed error messages.

Conclusion

We’ve covered the possible causes and solutions for the `microsoft.identitymode.tokens.audienceurivalidationfailedexception` issue. By following these steps, you should be able to resolve the error and successfully open the OneDrive document in your WKWebView. If you’re still stuck, feel free to leave a comment below, and we’ll do our best to help you out!

Keyword	Description
microsoft.identitymode.tokens.audienceurivalidationfailedexception	Error message indicating audience URI validation failure
Audience URI	Identifier for the resource being accessed (e.g., OneDrive document)
OneDrive API	API for accessing OneDrive documents and files
WKWebView	Web view component for displaying web content in iOS app
MSAL	Microsoft Authentication Library for generating authentication tokens

We hope this article has been informative and helpful in resolving the `microsoft.identitymode.tokens.audienceurivalidationfailedexception` issue. Happy coding!

Frequently Asked Question

If you’re struggling to open OneDrive documents in WKWebView on your iOS app, you’re not alone! We’ve got the lowdown on the microsoft.identitymodel.tokens.audienceurivalidationfailedexception error.