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I need to return a pdf and download in the makeup of it. However when returning the pdf Blob does not recognize it
$http.post($rootScope.raiz_ws + "/pdf/PdfCompraVenda", listProdutos)
            .then(function (response) {
                console.log(response);
                var file = new Blob([response], {type: 'application/pdf'});
                saveAs(blob, "RelatórioCompraVenda.pdf");
            });
[HttpPost]
        [Route("PdfCompraVenda")]
        public HttpResponseMessage Gerar(PdfLista listProdutos)
        {
        // criação do pdf no caminho
        // retorno abaixo
                    var path = @"C:\ERNetwork\ERNAdm\Relatorios\RelatórioCompraVenda.pdf";
                    HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
                    var stream = new FileStream(path, FileMode.Open);
                    result.Content = new StreamContent(stream);
                    result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
                    //result.Content.Headers.ContentDisposition.FileName = Path.GetFileName(path);
                    result.Content.Headers.ContentDisposition.FileName = Path.GetFileName(path);
                    result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");
                    return result;
            }