显示HTTP请求hapi.js 17.2.0的响应

时间:2017-12-26 07:34:31

标签: javascript node.js express promise hapijs

我尝试使用新的HapiJS 17显示页面,但它依赖于http请求。所以基本上我使用了一个rest API,然后将它返回给新的响应工具包aka' h toolkit'但它在控制台中出错

  

错误:处理程序方法未返回值,承诺或抛出错误

它还会出现浏览器错误

  

发生内部服务器错误

{"statusCode":500,"error":"Internal Server Error","message":"An internal server error occurred"}

以下是我的代码(为了简单起见,我尝试尽可能简单而不处理错误等等)

'use strict';

const Hapi = require('hapi');
const Request = require('request');

const server = Hapi.server({ 
  host: '127.0.0.1', 
  port: 8000,
  router: { stripTrailingSlash: true }
});

//Fix double slash issue
server.ext({
  type: 'onRequest',
  method: function (request, h) {
    var path = request.url.path.replace(/\/\//,'/');
    request.setUrl(path);
    return h.continue;
  }
});

server.route({
  method: 'GET',
  path:'/',
  handler: function (request, h) {
    return h.response('Welcome to HapiJS');
  }
});

server.route({
  method: 'GET',
  path:'/a',
  handler: function(req, h) {
    Request
      .get('https://httpbin.org/ip')
      .on('data', function(data) {
        return h.response('data:' + data);
      });
  }
});

server.start();
  

仅供参考,同样的事情在Express中工作没有任何问题(我猜测它也适用于HapiJS 16

const Express = require('express');
const Request = require('request');
const app = Express();
const port = "8000";

app.get('/', function(req, res, next) {
  res.send('Hello world');
});

app.get('/a', function(req, res, next) {
  Request
    .get('https://httpbin.org/ip')
    .on('data', function(data) {
      res.send('data:' + data);
    });
});

app.listen(port, () => console.log(`Example app listening on port ${port}!`));

我用HapiJS 16

找到了这个例子

http://www.eloquentwebapp.com/comsume-restful-api/

2 个答案:

答案 0 :(得分:1)

错误表明您应该像这样返回h.response的承诺:

server.route({
  method: 'GET',
  path:'/a',
  handler: (req, h) =>
    new Promise(
      (resolve,reject)=> 
        Request
        .get('https://httpbin.org/ip')
        .on('data', function(data) {
          resolve(h.response('data:' + data));
        })
    )
});
  

这仅适用于Hapi.js 16

然而;根据{{​​3}},您不必返回任何内容,可以执行以下操作:

server.route({
  method: 'GET',
  path:'/a',
  handler: (req, res) =>
    Request
    .get('https://httpbin.org/ip')
    .on('data', function(data) {
      res('data:' + data);
    })
});

答案 1 :(得分:1)

因为,HapiJs v17.x基于async / await。 使用const Request = require('request-promise');

  

请求承诺:https://github.com/request/request-promise

代码更改为以下内容:

server.route({
method: 'GET',
path:'/a',
handler: async function(req, h) {
  let response = await Request.get('https://httpbin.org/ip');
  return response;
 }
});