NodeJS npm react-native-fetch-blob -“RNFetchBlob.fetch不是函数”

piok6c0g  于 11个月前  发布在  Node.js
关注(0)|答案(2)|浏览(178)

使用npm包react-native-fetch-blob
我已经按照git仓库中的所有步骤使用了这个包。
然后,我使用以下行导入包:

var RNFetchBlob = require('react-native-fetch-blob');

字符串
我试图从服务器请求一个包含图像的BLOB。
这是我的主要方法。

fetchAttachment: function(attachment_uri) {

   var authToken = 'youWillNeverGetThis!'
   var deviceId = '123';
   var xAuthToken = deviceId+'#'+authToken

   //Authorization : 'Bearer access-token...',
   // send http request in a new thread (using native code)
   RNFetchBlob.fetch('GET', config.apiRoot+'/app/'+attachment_uri, {

       'Origin': 'http://10.0.1.23:8081',
       'X-AuthToken': xAuthToken
    })
    // when response status code is 200
    .then((res) => {
       // the conversion is done in native code
       let base64Str = res.base64()
       // the following conversions are done in js, it's SYNC
       let text = res.text()
       let json = res.json()
    })
    // Status code is not 200
    .catch((errorMessage, statusCode) => {
       // error handling
    });
}


我不断收到以下错误:

“Possible Unhandled Promise Refection(id:0):TypeError:RNFetchBlob.fetch is not a function”.

有什么想法吗?

j0pj023g

j0pj023g1#

问题是你使用的是ES 5风格的require语句,带有一个针对ES6/ES 2015编写的库。你有两个选择:
ES5:

var RNFetchBlob = require('react-native-fetch-blob').default

字符串
ES6:

import RNFetchBlob from 'react-native-fetch-blob'

cqoc49vn

cqoc49vn2#

我的导入看起来像这样:从'rn-fetch-blob'导入RNFetchBlob;
但是我得到了一个错误:TypeError:RNFetchBlob.scanFile不是一个函数
我的代码:

const downloadAudio = async () => {
    const { config, fs } = RNFetchBlob;
    const meditationFilesPath =
      Platform.OS == 'android'
        ? `${fs.dirs.DownloadDir}/meditations/${id}`
        : `${fs.dirs.DocumentDir}/meditations/${id}`;
    let audio_URL = track;
    let options = {
      fileCache: true,
      path: meditationFilesPath + `/${id}.mp3`,
      addAndroidDownloads: {
        // Related to the Android only
        useDownloadManager: true,
        notification: true,
        path: meditationFilesPath + `/${id}.mp3`,
        description: 'Audio',
      },
    };
    try {
      const resAudio = await config(options).fetch('GET', audio_URL.uri);
      if (resAudio) {
        const audio = await RNFetchBlob.fs.scanFile([
          { path: resAudio.path(), mime: 'audio/mpeg' },
        ]);
        console.log('res -> ', audio);
        Alert.alert('Audio Downloaded Successfully.');
      }
    } catch (error) {
      console.error('error from downloadAudio', error);
    }
  };

字符串

相关问题