How do I get ASP.NET Web API to return JSON instead of XML using Chrome?

Answer 1

I used a global action filter to remove Accept: application/xml when the User-Agent header contains "Chrome":

internal class RemoveXmlForGoogleChromeFilter : IActionFilter
{
    public bool AllowMultiple
    {
        get { return false; }
    }

    public async Task ExecuteActionFilterAsync(
        HttpActionContext actionContext,
        CancellationToken cancellationToken,
        Func> continuation)
    {
        var userAgent = actionContext.Request.Headers.UserAgent.ToString();
        if (userAgent.Contains("Chrome"))
        {
            var acceptHeaders = actionContext.Request.Headers.Accept;
            var header =
                acceptHeaders.SingleOrDefault(
                    x => x.MediaType.Contains("application/xml"));
            acceptHeaders.Remove(header);
        }

        return await continuation();
    }
}

Seems to work.