获得'分配的来源之一在原型链上有一个可枚举的密钥'在React原生应用上

时间:2017-03-08 05:12:09

标签: android react-native react-native-android

我正在为Android应用使用react-native。并使用axios作为http库。当我尝试通过http帖子发送Blob对象时,我将收到以下错误:

HTTP Failure in Axios TypeError: One of the sources for assign has an enumerable key on the prototype chain. Are you trying to assign a prototype property? We don't allow it, as this is an edge case that we do not support. This error is a performance optimization and not spec compliant.

下面是我用于在表单数据上添加blob对象的代码:

let data = new FormData()
  data.append('image', decodeBase64Image(image));

下面是解码base64图像的代码。以下代码在我的一个网站应用程序中工作正常。

export const decodeBase64Image = (dataURI) => {
  let byteString;
  if (dataURI === undefined) {
    return undefined
  }
  if (dataURI.split(',')[0].indexOf('base64') >= 0)
    byteString = atob(dataURI.split(',')[1]);
  else
    byteString = unescape(dataURI.split(',')[1]);

  // separate out the mime component
  let mimeString = ''
  if (dataURI.split(',')[0] != undefined && dataURI.split(',')[0].split(':')[1] != undefined) {
    mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0]
  }
  // write the bytes of the string to a typed array
  let ia = new Uint8Array(byteString.length);
  for (let i = 0; i < byteString.length; i++) {
     ia[i] = byteString.charCodeAt(i);
  }
  return new Blob([ia], {type: mimeString});
}

1 个答案:

答案 0 :(得分:0)

问题的根源在于React Native开发人员进行了不符合规范的性能优化(这就是代码在您的网站上运行的原因,而不是您的React Native应用程序)。有关详细信息,请参阅我在此处打开的问题:https://github.com/facebook/react-native/issues/16814

作为解决方法,您可以使用react-native-fetch-blob。我遇到了你做的同样的错误,并且react-native-fetch-blob为我解决了它。