$ npx create-nuxt-app nuxt-backend
npx: 379個のパッケージを17.593秒でインストールしました。
> Generating Nuxt.js project in /Users/(Username)/nuxt-backend
? Project name nuxt-backend
? Project description My laudable Nuxt.js project
? Use a custom server framework express
? Choose features to install Progressive Web App (PWA) Support, Axios
? Use a custom UI framework none
? Use a custom test framework none
? Choose rendering mode Single Page App
? Author name harusugi5
? Choose a package manager npm

exports.consumer_key = '<TwitterAPI登録申請して取得した API key>'
exports.consumer_secret = '<TwitterAPI登録申請して取得したConsumer_secret>'
exports.access_token_key = '<TwitterAPI登録申請して取得したAccess_token>'
exports.access_token_secret = '<TwitterAPI登録申請して取得したAccess_secret>'

var config  = require('./env');
var twitter = require('twitter');

var client = new twitter({
    consumer_key: config.consumer_key,
    consumer_secret: config.consumer_secret,
    access_token_key: config.access_token_key,
    access_token_secret: config.access_token_secret,
});

router.post('/tweettest', (req, res, next) => {

  var params = {screen_name: req.body.username,count: 200, exclude_replies: true,include_rts: false};

  client.get('statuses/user_timeline', params, function(error, tweets, response){
    if (!error) {
        // console.log(tweets);
        res.header('Content-Type', 'application/json; charset=utf-8')
        json = JSON.parse(JSON.stringify(tweets))

        tweetlist = [];
        json.forEach(function(value, index) {
          tweetlist.push(value.text)
        })
        res.send(tweetlist)
    }
  });
})

exports.client_id = "<COTOHA API Client ID>"
exports.client_secret = "<COTOHA API Client Secret>"

router.post('/cotohatest', function(req, res) {

  var access_token;

    token_url = "https://api.ce-cotoha.com/v1/oauth/accesstokens"
    headers = {
        "Content-Type": "application/json",
        "charset": "UTF-8"
    }

    data = {
        "grantType": "client_credentials",
        "clientId": config.client_id,
        "clientSecret": config.client_secret
    }

    fetch(token_url, {
       method: 'POST',
       headers: headers,
       body: JSON.stringify(data),
    })
    .then(res => res.json())
    .then(json => {
       access_token = json["access_token"]

       parse_url = "https://api.ce-cotoha.com/api/nlp/beta/user_attribute"

       headers = {
           "Content-Type": "application/json",
           "charset": "UTF-8",
           "Authorization": `Bearer ${access_token}`
       }

       data = {
           "document": req.body.document,
           "type": 'kuzure',
       }

       fetch(parse_url, {
          method: 'POST',
          headers: headers,
          body: JSON.stringify(data),
       })
       .then(response => response.json())
       .then(json => {
          res.send(JSON.stringify(json,null,'\t'))
        });
     });
})

{
    "result": {
        "age": "40-49歳",
        "hobby": [
            "ANIMAL",
            "COOKING",
            "FORTUNE",
            "GAMBLE",
            "GOURMET",
            "GYM",
            "INTERNET",
            "PAINT",
            "SHOPPING",
            "STUDY",
            "TVDRAMA"
        ],
        "moving": [
            "RAILWAY",
            "WALKING"
        ]
    },
    "status": 0,
    "message": "OK"
}

<input type="text" v-model="username" value="harusugi5" name="username"/>
<button @click="post_twitter()">上のユーザのTweetから属性推定</button>
<p>user attributes: {{ user_result }}</p>
<p>tweets: {{ tweet_result }}</p>

export default {
  data: function() {
    return {
      tweet_result: "ここに解析したtweetを表示",
      user_result: null,
      username: "harusugi5",
    }
  },
  methods: {
    post_twitter(){
      this.$axios
          .$post('api/tweettest',{
           "username" : this.username
      })
      .then(response => {
        this.result_username = this.username
        this.tweet_result = response
        this.$axios
           .$post('api/cotohatest',{
           "document" : response
        })
        .then(response2 => {
          this.user_result = response2
        })
        .catch(error => {
          console.log(error)
        })
      })
      .catch(error => {
        console.log(error)
      })
    },
  },
}

runtime: nodejs10

instance_class: F2

automatic_scaling:
  min_instances: 0

handlers:
  - url: /_nuxt
    static_dir: .nuxt/dist/client

  - url: /(.*\.(gif|png|jpg|ico|txt))$
    static_files: static/\1
    upload: static/.*\.(gif|png|jpg|ico|txt)$

  - url: /sw.js
    static_files: static/sw.js
    upload: static/sw.js

  - url: /.*
    script: auto
    secure: always

env_variables:
  NUXT_HOST: '0.0.0.0'
  NUXT_PORT: '8080'