如何在JavaScript中显示服务器端生成的PDF流，通过HttpMessageResponse发送内容 [英] How to display a server side generated PDF stream in javascript sent via HttpMessageResponse Content

问题描述

在我的服务器端我使用ASP.NET MVC Web Api，其中我生成PDF文件与水晶报表，并将其导出为PDF格式。代码如下：

On my server side I am using ASP.NET MVC Web Api, where I am generating the PDF file with Crystal report and exporting it to PDF format. The code goes as follows:

[HttpPost]
public HttpResponseMessage SetReport(string name, [FromBody]List<KontoDto> konta)
{
            var response = Request.CreateResponse(HttpStatusCode.OK);
            var strReportName = "KontoReport.rpt";
            var rd = new ReportDocument();
            string strPath = HttpContext.Current.Server.MapPath("~/") + "Reports//" + strReportName;
            rd.Load(strPath);
            rd.SetDataSource(konta);
            var tip = ExportFormatType.PortableDocFormat;
            var pdf = rd.ExportToStream(tip);
           response.Headers.Clear();
            response.Content = new StreamContent(pdf);
            response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");
            return response;

}

我的Javascript代码是：

My Javascript code is:

  $scope.xxprint = function () {
        console.log($scope.konta);
        $http.post('/api/konto/setReport/pdf', $scope.konta, { responseType: 'arraybuffer' })
            .success(function (data) {
                 var file = new Blob([data], { type: 'application/pdf' });
                var fileURL = URL.createObjectURL(file);
                window.open(fileURL);
            });
    };

这根本不起作用。我不知道这个代码有什么问题。我得到浏览器打开pdf查看器，但它是空的。此外，创建的pdf正确创建，因为我可以将其保存到磁盘，然后使用Adobe Acrobat查看器打开它。 HttpResponseMessage的内容似乎也通过Fiddler正确查看。查看图片：

This simply does not work. I don't know what's wrong with this code. I get the browser to open the pdf viewer, but it is empty. Also, the created pdf is correctly created as I can save it to disk and open it then with Adobe Acrobat viewer. The content of the HttpResponseMessage seems also correct viewed via Fiddler. See image:

推荐答案

似乎我做的一切正常。问题是我的angularjs版本（v1.08）。当升级到v1.2一切工作确定。在v1.08中， responseType：'arraybuffer' paramater（这对我的工作至关重要）被angularjs忽略了。它似乎是从v.1.1实现。请参阅此SO问题：如何在AngularJS中读取二进制数据在ArrayBuffer中？

Seems I did it correctly all the time. The problem was with my angularjs version (v1.08). When upgrading to v1.2 everything worked ok. In v1.08 the responseType: 'arraybuffer' paramater (which is crucial to what I was doing) was simply ignored by angularjs. It seems to be implemented as of v.1.1. See this SO question: How to read binary data in AngularJS in an ArrayBuffer?

这篇关于如何在JavaScript中显示服务器端生成的PDF流，通过HttpMessageResponse发送内容的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！