CefCustomScheme with SchemeName other than https:// causes audio played twice

[simonbuehler]

• What version of the product are you using? nuget

• What architecture x86 or x64? x64

• What version of .Net? Net 4.x

• On what operating system? Win10

• Are you using WinForms, WPF or OffScreen? WinForms

• What steps will reproduce the problem? When creating a CefCustomScheme like this

  settings.RegisterScheme(new CefCustomScheme
                          {
                              SchemeName = "localfolder",
                              DomainName = "cefsharp",
                              SchemeHandlerFactory = new FolderSchemeHandlerFactory(
                                  rootFolder: Global.AppdataPath,
                                  hostName: "cefsharp",
                                  defaultPage: "index.html" // will default to index.html
                              )
                          });

  and opening a page with a audio element

  <audio id="player"><source src="img/meep.mp3" type="audio/mpeg"></audio>

  and some player.play(); JavaScript, the sound will start to play and replay from the start after ~1second or so - is this some caching /reloading issue?

BUT when changing the SchemeName = "https" the sound just plays once as it should.

• What is the expected output? What do you see instead?

One "MEEP" is enough ;)

[amaitland]

This is not something that can be fixed directly in CefSharp. The problem would need to be fixed in CEF which has it's own issue tracker at https://bitbucket.org/chromiumembedded/cef/issues?status=new&status=open

As it works with http(s) in my experience it's unlikely that this would be fixed by the CEF maintainers, you are of course welcome to debug this yourself.

Using the https/http scheme and specifying a domain name is the preferable to using a custom scheme name. Custom schemes do behave differently as you've found out.

Closing as upstream.

[simonbuehler]

Fair enough, maybe the docs should note that

[amaitland]

Sounds reasonable, contributions welcome.

Anyone with a GitHub account can edit the wiki.