angularjs框架下载文件

<a href="path_to_file" download="filename">Download</a>

$scope.downloadFile = function(url, filename) {
    var link = document.createElement('a');
    link.href = url;
    link.download = filename || 'downloaded_file';
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
};

$scope.downloadFile = function() {
    $http({
        method: 'GET',
        url: '/api/download',
        responseType: 'blob'
    }).then(function(response) {
        var blob = new Blob([response.data], {type: 'application/octet-stream'});
        var url = window.URL.createObjectURL(blob);
        var a = document.createElement('a');
        a.href = url;
        a.download = 'filename.ext';
        document.body.appendChild(a);
        a.click();
        a.remove();
        window.URL.revokeObjectURL(url);
    });
};