Request multipart with rn-fetch-blob (Android doesn't allow number in param)

request-multipart-with-axios.js

/**
   * A file must have structure as below:
   * {
   *  name: 'file'
   *  content: {
   *    uri: 'file://abc',
   *    data: 'file body', only use uri or data
   *    name: 'avatar.jpg',
   *    type: 'image/jpg'
   *  }
   * }
   */
  requestMultipart = (method, uri, files, data = {}, useToken = true, extHeaders = {}) => {
    const headers = extHeaders

    if (useToken && this.authorizationToken) {
      headers['Authorization'] = this.authorizationToken
    }

    if (this.contentLang) {
      headers['content-language'] = this.contentLang
    }

    const formData = []

    for (const key in data) {
      formData.push({
        name: key,
        // this line is important
        data: Platform.OS === 'android' && typeof(data[key]) === 'number' ? data[key].toString() : data[key]
      })
    }

    for (let i = 0; i < files.length; i++) {
      const file = files[i]
      if (file.content.data) {
        formData.push({
          name: file.name,
          filename: file.content.name,
          type: file.content.type,
          data: file.content.data
        })
      } else {
        formData.push({
          name: file.name,
          filename: file.content.name,
          type: file.content.type,
          data: RNFetchBlob.wrap(file.content.uri.replace('file://', ''))
        })
      }
    }
    const url = `${Config.API_ENDPOINT}${uri}`
    return RNFetchBlob.fetch(method, url, headers, formData)
  }