javascript - 使用动态创建的链接在 AngularJS 中下载文件

Question

我正在使用 ng-click 调用一个函数，该函数向服务器发出 post http 请求，然后创建一个链接。如何使用此创建的链接来下载附加的文件？

我的模板

<button ng-click="getFile(row)">Download</button>

我的 Controller

$scope.getFile = function(row){
    row.isSelected = true;

    var link = null;

    var postData = {
        "data" : {
            "type": "member_report",
            "relationships": {
                "member" : {
                    "data": {
                        "type": "user",
                        "id": memberID
                    }
                }
            }
        }
    }

    ajaxRequest.ajaxPost('http://someApi.com', postData).then(
        function(jsonAPI) {
            link = jsonAPI.links.download; //here is the response link
            //todo something with it to download file   
        },
        function(errorResponse) {           
        }
    );
}

顺便说一句，ajaxRequest 只是一个简单的 $http 服务包装器。

Answer 1

如果我理解你的意思，那么我想你想在动态获取链接后立即启动下载，那么你可以按如下方式进行

$scope.getFile = function(row){
    row.isSelected = true;

    var link = null;

    var postData = {
        "data" : {
            "type": "member_report",
            "relationships": {
                "member" : {
                    "data": {
                        "type": "user",
                        "id": memberID
                    }
                }
            }
        }
    }

    ajaxRequest.ajaxPost('http://someApi.com', postData).then(
        function(jsonAPI) {
            link = jsonAPI.links.download;

            // Now we want to download the link 
           var downloadLink = document.createElement('a');
                downloadLink .href = link;
                // now set the visibility to hidden so that it doesnt effect the frontend layout
                downloadLink .style = 'visibility:hidden';
                downloadLink .download = 'file_name';
                // now append it to the document, generate click and remove the link
                document.body.appendChild(downloadLink );
                downloadLink .click();
                document.body.removeChild(downloadLink );

        },
        function(errorResponse) {           
        }
    );
}