在Internet Explorer中从二进制文件打开PDF

Question

与需要在IE窗口中打开blob / PDF和在AngularJS中设置window.location或window.open有关，在IE 11中会给出“拒绝访问”的信息 。

我需要打开来自服务中字节数组的PDF：

@RequestMapping("/{dokumentId}")
public ResponseEntity<byte[]> getDoc(@PathVariable Integer docId, HttpServletRequest request, HttpServletResponse response) throws IOException {       
    byte[] contents = // .. get document 

    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.parseMediaType("application/pdf"));
    headers.add("Content-Disposition", "inline;filename=file");
    headers.add("Cache-Control","private, must-revalidate, post-check=0, pre-check=0, max-age=1");
    headers.add("Pragma", "no-cache");
    headers.setContentLength(contents.length);

    return new ResponseEntity<>(contents, headers, HttpStatus.OK);
}

我正在尝试使用以下JS在Internet Explorer 11中打开它：

$scope.openPdf = function(doc){
    var winlogicalname = "document_" + doc.docId;
    var winparams = 'dependent=yes,locationbar=no,scrollbars=yes,menubar=yes,resizable,screenX=50,screenY=50,width=850,height=1050';

    var ieEDGE = navigator.userAgent.match(/Edge/g);
    var ie = navigator.userAgent.match(/.NET/g); // IE 11+
    var oldIE = navigator.userAgent.match(/MSIE/g); 

    if(!ie && !oldIE && !ieEDGE){
        // Open PDF in new browser window
        var detailWindow = window.open("", winlogicalname, winparams);
    }

    xxxService.getDoc(doc).success(function(data){
        //for browser compatibility  
        if (ie || oldIE || ieEDGE) {
            var blob = new window.Blob([data], { type: 'application/pdf' });    
            window.navigator.msSaveOrOpenBlob(blob);
        } else {
            var binaryAsString = ArrayBufferToString(data).replace(/"/g,"");
            var pdfAsDataUri = "data:application/pdf;base64," + binaryAsString;
            var htmlText = '<embed width=100% height=100% type="application/pdf" src="'+ pdfAsDataUri + '"></embed>'; 
            detailWindow.document.write(htmlText);
            detailWindow.document.close();
        }   
    }).error(function(data, status, headers, config){
        console.log(data, status, headers, config);
    });
};

这在Chrome和Firefox中有效（在新窗口中打开，直接使用<embed>从二进制构造。）但是，这种方法在IE中似乎不起作用，因此msSaveOrOpenBlob 。但是在IE中保存/打开PDF时，出现错误在Adobe Reader中：“ Adobe Acrobat Reader DC could not open 'file.pdf' because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decoded). ” Adobe Acrobat Reader DC could not open 'file.pdf' because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decoded). “。当我尝试将PDF拖放到IE时，它说“ File does not begin with '%PDF-'. ”。

关于如何直接使用字节数组或构造Blob在IE11中打开PDF的任何想法？

Answer 1

我将我的网络服务更改为：

byte[] contents = // get contents

response.getOutputStream().write(contents);
response.setContentType("application/pdf");
response.setContentLength(contents.length);
response.addHeader("Content-Disposition", "inline;filename="+filename);
response.addHeader("Cache-Control", "private, must-revalidate, post-check=0, pre-check=0, max-age=1");
response.addHeader("Pragma", "public");

然后在客户端使用：

Service.getDocument(docId).success(function(data){
    var file = new Blob([data], {type: 'application/pdf'});
    if(window.navigator.msSaveOrOpenBlob){
        window.navigator.msSaveOrOpenBlob(file, name + ".pdf");
    } else {
        var fileURL = URL.createObjectURL(file);
        $scope.renderPDF(fileURL, detailWindow.document.getElementById('canvas'));
    } 
}

其中$scope.renderPDF使用PDFJS在新窗口中呈现PDF。 请记住在$http.get （或post ）方法上设置{responseType:'arraybuffer'}) 。