如何获取AngularJS BLOB以下载PDF？

Question

如何获取AngularJS BLOB以下载PDF？

8

大家好，我对使用AngularJS进行开发非常新手，我正在尝试弄清如何使用BLOB将PDF下载到本地机器。我已经成功地使用JSON完成了这项工作，现在我需要一个PDF。我编写了一些代码，但似乎无法正常工作。

html

<!DOCTYPE html>
<html lang="en">
<head>
    <style>
        .center {
            position: absolute;
            left: 50%;
            bottom: 50%;
        }

        .btn-purple {
            background-color: rgb(97, 34, 115);
            width: 100px;
        }

    </style>
    <meta charset="UTF-8">
    <title></title>
    <!-- Latest compiled and minified CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"
          integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
</head>


<body>
<div class="center" ng-controller="jsonController" ng-app="app">
    <a style="color: white;" ng-href="{{ fileUrl }}" download="{{fileName}}">
        <button type="button" class="btn btn-purple">{{fileName}}</button>
    </a>
</div>

<div class="center" ng-controller="pdfController" ng-app="app">
    <a style="color: white;" ng-href="{{ fileUrl }}" download="{{fileName}}">
        <button type="button" class="btn btn-purple">{{fileName}}</button>
    </a>
</div>


<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.9/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/javascript-canvas-to-blob/3.1.0/js/canvas-to-blob.js"></script>
<script src="app.js"></script>
</body>
</html>

controller.js

var app = angular.module('app', []);

app.config(['$compileProvider', function ($compileProvider) {
    $compileProvider.aHrefSanitizationWhitelist(/^\s*(|blob|):/);
}]);

app.controller('jsonController', function ($scope, $window, $http, $log) {
    $http.get('data.json')
        .success(function (info) {
            var data = angular.toJson(info, true);
            data = data.replace(/\n/g, "\r\n")
            console.log(data)
            var blob = new Blob([data], {type: "octet/stream"}),
                url = $window.URL || $window.webkitURL;
            $scope.fileUrl = url.createObjectURL(blob);
            $scope.schemaName = "test"
            $scope.fileName = $scope.schemaName + ".json"
        })
});
app.controller("pdfController", function ($scope, $http, $log, $sce) {
    $http.get('data.json' + $stateParams.id,
        {responseType: 'arraybuffer'})
        .success(function (response) {
            var file = new Blob([(response)], {type: 'application/pdf'});
            var fileURL = URL.createObjectURL(file);
            $scope.content = $sce.trustAsResourceUrl(fileURL);
        });
});

- user2402107

5个回答

9

在以下浏览器上测试了大文件（> 1.5 GB）：

Firefox 56.0
Safari 11.0

在你的angular控制器中使用以下内容：

$scope.download = function() {
 $http({
   method: 'GET',
   url: fileResourceUrl,
   responseType: 'blob'
 }).then(function(response) {
   var blob = response.data;
   startBlobDownload(blob, "largedoc.pdf")
 });

};

function startBlobDownload(dataBlob, suggestedFileName) {
   if (window.navigator && window.navigator.msSaveOrOpenBlob) {
      // for IE
      window.navigator.msSaveOrOpenBlob(dataBlob, suggestedFileName);
   } else {
      // for Non-IE (chrome, firefox etc.)
      var urlObject = URL.createObjectURL(dataBlob);

      var downloadLink = angular.element('<a>Download</a>');
      downloadLink.css('display','none');
      downloadLink.attr('href', urlObject);
      downloadLink.attr('download', suggestedFileName);
      angular.element(document.body).append(downloadLink);
      downloadLink[0].click();

      // cleanup
      downloadLink.remove();
      URL.revokeObjectURL(urlObject);
  }
}

- Steve Oh

0

将您的responseType从responseType: 'arraybuffer'更改为responseType: 'blob'

- Ricardo Alfaro

0

在使用mpdf时，这段代码对我在Angular 9和Yii2中都有效。

this._gService.download_post(`controller/action`, postData).pipe(takeUntil(this._unsubscribeAll)).subscribe(result => {

  const fileURL = URL.createObjectURL(result);

  // Direct print preview

  // const iframe = document.createElement('iframe');
  // iframe.style.display = 'none';
  // iframe.src = fileURL;
  // document.body.appendChild(iframe);
  // iframe.contentWindow.print();

  // Direct Download

  const fileName = 'Patient Report';
  const a = document.createElement('a');
  document.body.appendChild(a);
  a.href = fileURL;
  a.download = fileName;
  a.click();


}, error => {
   // show error message
});

- danish ali

0

在你的 PHP 控制器中

   return $pdf->stream();

在你的 AngularJS 控制器中

$http.post('generate', {
    dateStart:  $scope.ds,
    dateEnd:    $scope.de
}, 
{
  responseType: 'arraybuffer'
}).then(function success(response) {

  var blob = new Blob([response.data], { type: "application/pdf"});
  saveAs(blob, "filename.pdf");

}, function error(error) {
    $scope.recordErrors(error);
});

- Cande Alberto Ríos Valadez

你确定原帖作者使用的是 PHP 吗？ - Vega

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- Zeeshan Hassan Memon · Accepted Answer

HTML:

<button ng-click="downloadPdf()" >Download PDF</button>

JS 控制器：

'use strict';
var app = angular.module('app')
    .controller('ctrl', function ($scope, MathServicePDF) {
        $scope.downloadPdf = function () {
            var fileName = "file_name.pdf";
            var a = document.createElement("a");
            document.body.appendChild(a);
            ServicePDF.downloadPdf().then(function (result) {
                var file = new Blob([result.data], {type: 'application/pdf'});
                var fileURL = window.URL.createObjectURL(file);
                a.href = fileURL;
                a.download = fileName;
                a.click();
            });
        };
});

JS服务：

app.factory('ServicePDF', function ($http) {
        return {
            downloadPdf: function () {
            return $http.get('api/my-pdf', { responseType: 'arraybuffer' }).then(function (response) {
                return response;
            });
        }
    };
});

愿你乐意帮助他人！