返回 image/jpeg 作为 arraybuffer 或 blob

Question

我目前正在调用我的 api，其中 returns 图像作为 image/jpeg。我的问题是，当通过 javascript angular .factory 资源调用 url 时，我的数组缓冲区为空 {}。此外，字节长度为 0。如果我使用响应类型 '' 或 'text' 调用 api url，我会看到多种类型的值。我在这里错过了什么？感谢您的帮助！

JS:

.factory("Img", function($resource) {
    return $resource("http://mypathTo/image/:id", {
      id: "@id"
    }, {
      responseType: '' //arraybuffer return empty
    });
  });

app.controller //代码

    $scope.getImage = function(productid) {
      console.log(productid);
      par = {id: [productid]};
      Img.getImage(par).$promise.then(
        function(data){
          console.log("success:" + data); //I am able to see bytes when coming back as text but not with arraybuffer as data.bytelength = 0
          scope.productionPicturePath = data;
          return data;
        },
        function(data){
          console.log("error" + data);
        }
      );
    }
}

Answer 1

$resource service can only return JavaScript objects or arrays depending on isArray. To get exotic objects such as ArrayBuffer or Blob, use the $http service.

The DEMO

angular.module("app",[])
.controller("ctrl", function($scope,$http) {
    var vm = $scope;
    var url="//i.imgur.com/fHyEMsl.jpg";

    var config = { responseType: 'blob' };
    $http.get(url,config)
      .then(function(response) {
        console.log("OK");
        //console.log(response.data);
        vm.blob = response.data;
        vm.dataURL = URL.createObjectURL(vm.blob);
        console.log(vm.dataURL);
    }).catch(function(response) {
        console.log("ERROR");
        throw response;
    });
})

<script src="//unpkg.com/angular/angular.js"></script>
  <body ng-app="app" ng-controller="ctrl">
      BLOB type {{blob.type}}<br>
      BLOB size {{blob.size}}<br>
    <img ng-src="{{dataURL}}" height="100" />
  </body>

返回 image/jpeg 作为 arraybuffer 或 blob

returning image/jpeg as arraybuffer or blob

javascript

angularjs

angularjs-http

JS:

app.controller //代码

The DEMO