无法读取未定义的属性“协议”

Question

尝试从API获取数据时，在控制台中收到该错误。有人以前有这个问题吗？

var url = "https://api.website.com/get/?type=events&lat=" + localStorage.getItem('latitude')
+ "&lng=" + localStorage.getItem('longitude') + "&distance=50";

$http({
    headers: {
        'Content-type': 'application/json'
    }
})

$http.get(url).success(function (events) {
    $scope.events = events;
});

错误：

TypeError: Cannot read property 'protocol' of undefined
at Gb (http://localhost:38772/www/js/plugins/angular.min.js:114:238)
at s (http://localhost:38772/www/js/plugins/angular.min.js:65:249)
at new EventsController (http://localhost:38772/www/js/angular.js:4:5)
at d (http://localhost:38772/www/js/plugins/angular.min.js:30:452)
at Object.instantiate (http://localhost:38772/www/js/plugins/angular.min.js:31:80)
at http://localhost:38772/www/js/plugins/angular.min.js:61:486
at http://localhost:38772/www/js/plugins/angular.min.js:49:14
at q (http://localhost:38772/www/js/plugins/angular.min.js:7:380)
at E (http://localhost:38772/www/js/plugins/angular.min.js:48:382)
at f (http://localhost:38772/www/js/plugins/angular.min.js:42:399)

Answer 1

您正在发出格式错误的$ http请求。

您不应在单独调用中设置标头$http。Call to
$http()实际上会发出请求，但是由于您仅使用标头配置了请求（没有url或方法），因此它会向您抛出该错误（如预期的那样）。

如果要设置标题，则需要通过将自定义配置对象作为第二个参数传递给$http.get()调用来实现：

$http.get(url, {
  headers: {
    'Content-type': 'application/json'
  }
}).success(function (events) {
  $scope.events = events;
});