为什么fetch返回一个奇怪的整数哈希？ [英] Why does fetch return a weird hash of integers?

问题描述

我正在使用带有React Native的 fetch API。

I'm using fetch API with React Native.

我的回复遵循正常格式 {message：error here} 如果状态> = 400，我将在原生弹出窗口中显示。

My response follows a normal format of {"message": "error here"} if the status is >= 400, which I will show in a native popup.

我正在尝试在检测到故障后调用 response.json（），但它仍然以一种奇怪的格式放置所有内容......

I'm trying to call response.json() after detecting a failure, but it keeps putting everything in a weird format...

{_45：0，_81：0，_65：null，_54：null}

无论出于何种原因...我想要的实际响应位于 _65 ...我不知道这些随机密钥是什么。

For whatever reason... the actual response I want is located in _65... I have no idea what these random keys are.

所以目前我不得不通过 _bodyText 访问它，但我认为这是错误的，因为它是一个私有的下划线方法。

So currently I'm having to access it via _bodyText, but I assume that is wrong because it's a private underscore method.

我做错了什么？

var API = (function() {

  var base = 'https://example.com/api/v1';

  var defaults = {
    credentials: 'same-origin',
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'application/json'
    }
  };

  var alertFailure = function(response) {
    if (response.status >= 200 && response.status < 400) {
      return response;
    } else {
      var json = JSON.parse(response._bodyText || '{}');
      var message = json.message || 'There was a problem. Close the app, and try again later.';

      var error = new Error(message);
      error.response = response;
      throw error;
    }
  };

  var callAPI = function(url, opts) {
    opts.headers['X-Version'] = 'v' + Package.version;

    return fetch(base + url, opts)
      .then(alertFailure)
      .then((response) => {
        return response.json();
      })
      .catch((error) => {
        Alert.alert(null, error.message);
      });
  };

  return {

    get: function(url, opts) {
      var fullOpts = Object.assign({}, defaults, opts);
      return callAPI(url, fullOpts);
    },

    post: function(url, data, opts) {
      var fullOpts = Object.assign({}, defaults, {
        method: 'POST',
        body: JSON.stringify(data || {})
      }, opts);
      return callAPI(url, fullOpts);
    }
  };

})();

推荐答案

答案是。 json（）返回一个承诺...所以我必须在 .then（）

The answer is that .json() returns a promise... so I had to do everything from within .then()

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