axios expressJS 不同的文件答案

【问题标题】：axios expressJS different filesaxios expressJS 不同的文件
【发布时间】：2020-04-23 02:49:33
【问题描述】：

在我看到的每个地方，每个人都在 express get 调用中使用 axios 调用。我不想那样做。我在另一个文件中有 API 调用的代码，并从我的路由器调用它。我只是不知道如何访问返回的数据。有人可以帮忙吗？

axios 调用：

function weather(geo) {
  let geoLocation = `https://api.mapbox.com/geocoding/v5/mapbox.places/${encodeURIComponent(geo)}.json?access_token=pk.eyJ1IjoiY2FydGVydzIxMjQiLCJhIjoiY2s5NGNlcmY2MDAzaTNncDJwN2ozdWk2byJ9._fm9rvVvhbCJE2eN0C-gqQ&limit=1`
  axios.get(geoLocation)
    .then((response) => {
      if (response.data.features.length === 0) {
        return console.log('Unable to find location')
      } else {
        const long = response.data.features[0].center[1]
        const lat = response.data.features[0].center[0]
        const url = `http://api.weatherstack.com/current?access_key=ebe5b5662c85c2740c00d538723b44b3&query=${long},${lat}&units=f`
        return axios.get(url)
      }
    })
    .then((response) => {
      if (response.data.error) {
        console.log(response.data.error.info)
      } else {
        console.log(response.data)
        let forecastData = response.data;
        return forecastData
      }
    })
    .catch((error) => {
      console.log('Unable to connect to weather service')
    })
}

特快电话：

router.get('/help', function (req, res) {
  weather.weather(req.query.address)
  res.send({
    address: req.query.address,
    forecast: '?'
  })
})

【问题讨论】：

标签： node.js express axios

【解决方案1】：

您的weather 函数是异步的，因此您应该为axios 调用添加返回值：

function weather(geo) {

  let geoLocation = `https://api.mapbox.com/geocoding/v5/mapbox.places/${encodeURIComponent(geo)}.json?access_token=pk.eyJ1IjoiY2FydGVydzIxMjQiLCJhIjoiY2s5NGNlcmY2MDAzaTNncDJwN2ozdWk2byJ9._fm9rvVvhbCJE2eN0C-gqQ&limit=1`
  return axios.get(geoLocation)
    .then((response) => {
      if (response.data.features.length === 0) {
        throw 'Unable to find location'
      } 
      else {
        const long = response.data.features[0].center[1]
        const lat = response.data.features[0].center[0]
        const url = `http://api.weatherstack.com/current?access_key=ebe5b5662c85c2740c00d538723b44b3&query=${long},${lat}&units=f`
        return axios.get(url)
      }
    })
    .then((response) => {
      if (response.data.error) {
        throw response.data.error.info
      } 
      else {
        console.log(response.data)
        let forecastData = response.data;
        return forecastData
      }
    })
    .catch((error) => {
      throw error;
    })
}

在您的路由器中：

router.get('/help', function (req, res) {
  weather.weather(req.query.address)
    .then(res => {
      res.send({
        address: req.query.address,
        forecast: '?'
      })
    })
    .catch(err => {
      console.log(err);
    })

})

同样返回console.log 也不正确。只需抛出它的消息并在路由器中处理消息：

来自

if (response.data.features.length === 0) {
  return console.log('Unable to find location')
}

到

if (response.data.features.length === 0) {
  throw 'Unable to find location'
}

【讨论】：

感谢赛义德的帮助