IResourceHandler proper response

[crisleiria]

I am using CafSharp wpf some time now, and now its time to update do latest versions.

I created an custom link and implemented with IResourceHandler. This custom link open file explorer on an specific network path.
This was working with no problems.

After update to latest version (87.1.132), when I click on my custom link, application opens explorer on the correct network path but also open File Download dialog to download file with no data.. What is the cause of this?
Do I need to specify some sort of response headers?

I have implemented IResourceHandler.ProcessRequest(IRequest request, ICallback callback) for this.

Please advice, thanks in advance.
Cristovao Oliveira

[amaitland]

After update to latest version (87.1.132)

Does the problem reproduce version 88.2.90?

Without a detailed example I cannot even speculate what's going on here.

[crisleiria]

I have implemented a custom Interceptor class for links:

public sealed class ShellSchemeHandler : ISchemeHandlerFactory, IResourceHandler

`

    bool IResourceHandler.Open(IRequest request, out bool handleRequest, ICallback callback)
    {
        try
        {
            // Make sure URL matches.
            var match = ShellRegex.Match(request.Url);
            if (!match.Success)
            {
                handleRequest = false;
                return false;
            }
            var targetPath = match.Groups[1].Value.ToUpperInvariant();
            targetPath = targetPath.Replace('/', '\\');


            // Tries to open the file/folder.
            Process.Start("explorer.exe", $"\\\\{targetPath}");
            callback.Continue();
           
        }
        catch (Exception exception)
        {
            MessageBox.Show($"An exception '{exception.GetType()}' was thrown with the following message: {exception.Message}.", "Error on executing operation", MessageBoxButton.OK, MessageBoxImage.Error);
        }

        handleRequest = true;
        return true;
    }

`

When I click on custom link (Green folder), if I have Regex Match I want to open explorer on custom path. On version 87 and 88 it opens explorer but also File Save Dialog on the same moment. I notice changes on IResourceHandler interface... problaly I need to change some sort of response or change something on callback object.

This appens on versions 87 and 88.

[crisleiria]

Dear @amaitland

Thank you for your help. Sorry for not placing version info.

Well it opens explorer but it also opens FileSave Dialog... So I believe the request is still be handled on some events after.
I also notice IResourceHandler.Read is called.

Here is the working version class of ShellSchemeHandler from version 73

https://drive.google.com/file/d/1Bf7qcWcbikFFZNVUZIksXfkQQ8jgjzOX/view?usp=sharing

Basically what I have done was ProcessRequest to Open method basically.
If possible please advise what I can do here.

[amaitland]

Here is the working version class of ShellSchemeHandler from version 73

Please use a code sharing service like GitHub gist

https://gist.github.com/

[crisleiria]

https://gist.github.com/crisleiria/33fa169af77c6f435c1382a2ff9e825e

[amaitland]

See https://github.com/cefsharp/CefSharp/wiki/General-Usage#protocol-execution for the approach I'd recommend.

Using a custom scheme for this use case is not recommend now. Canceling the navigation in OnBeforeBrowse is the simplest option.

[crisleiria]

Dear @amaitland,

I implemented your approach link, changed accordly and it works properly now.

Thank you for your help.