public async Task InvokeAsync(HttpContext context)
{
string versionParam = GetQueryParameter(context, "v");
if (!Version.TryParse(versionParam, out Version version) || version < MinimumClientVersion)
{
context.Response.StatusCode = StatusCodes.Status200OK;
context.Response.ContentType = "text/xml";
await context.Response.WriteAsync(
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
$"<subsonic-response xmlns=\"http://subsonic.org/restapi\" status=\"failed\" version=\"{MinimumClientVersion.ToString(3)}\">\n" +
" <error code=\"20\" message=\"Incompatible Subsonic REST protocol version. Client must upgrade.\"/>\n" +
"</subsonic-response>");
return;
}
// Call the next delegate/middleware in the pipeline
await _next(context);
}
