在Internet Explorer中從二進制文件打開PDF

Question

與需要在IE窗口中打開blob / PDF和在AngularJS中設置window.location或window.open有關，在IE 11中會給出“拒絕訪問”的信息 。

我需要打開來自服務中字節數組的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);
}

我正在嘗試使用以下JS在Internet Explorer 11中打開它：

$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);
    });
};

這在Chrome和Firefox中有效（在新窗口中打開，直接使用<embed>從二進制構造。）但是，這種方法在IE中似乎不起作用，因此msSaveOrOpenBlob 。但是在IE中保存/打開PDF時，出現錯誤在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). “。當我嘗試將PDF拖放到IE時，它說“ File does not begin with '%PDF-'. ”。

關於如何直接使用字節數組或構造Blob在IE11中打開PDF的任何想法？

Answer 1

我將我的網絡服務更改為：

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");

然后在客戶端使用：

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$scope.renderPDF使用PDFJS在新窗口中呈現PDF。 請記住在$http.get （或post ）方法上設置{responseType:'arraybuffer'}) 。