将JSON传递给HTTP POST请求

Question

我正在尝试使用nodejs和请求 [2] 向谷歌QPX Express API [1]发出HTTP POST请求.

我的代码如下:

    // create http request client to consume the QPX API
    var request = require("request")

    // JSON to be passed to the QPX Express API
    var requestData = {
        "request": {
            "slice": [
                {
                    "origin": "ZRH",
                    "destination": "DUS",
                    "date": "2014-12-02"
                }
            ],
            "passengers": {
                "adultCount": 1,
                "infantInLapCount": 0,
                "infantInSeatCount": 0,
                "childCount": 0,
                "seniorCount": 0
            },
            "solutions": 2,
            "refundable": false
        }
    }

    // QPX REST API URL (I censored my api key)
    url = "https://www.googleapis.com/qpxExpress/v1/trips/search?key=myApiKey"

    // fire request
    request({
        url: url,
        json: true,
        multipart: {
            chunked: false,
            data: [
                {
                    'content-type': 'application/json',
                    body: requestData
                }
            ]
        }
    }, function (error, response, body) {
        if (!error && response.statusCode === 200) {
            console.log(body)
        }
        else {

            console.log("error: " + error)
            console.log("response.statusCode: " + response.statusCode)
            console.log("response.statusText: " + response.statusText)
        }
    })

我想要做的是使用multipart参数传递JSON [3].但是没有正确的JSON响应,我得到了一个错误(400未定义).

当我使用相同的JSON和API Key使用CURL发出请求时,它工作正常.所以我的API密钥或JSON没有任何问题.

我的代码出了什么问题？

编辑:

工作CURL示例:

i)我将我传递给我的请求的JSON保存到名为"request.json"的文件中:

{
  "request": {
    "slice": [
      {
        "origin": "ZRH",
        "destination": "DUS",
        "date": "2014-12-02"
      }
    ],
    "passengers": {
      "adultCount": 1,
      "infantInLapCount": 0,
      "infantInSeatCount": 0,
      "childCount": 0,
      "seniorCount": 0
    },
    "solutions": 20,
    "refundable": false
  }
}

ii)然后,在终端我切换到新创建的request.json文件所在的目录并运行(myApiKey显然代表我的实际API密钥):

curl -d @request.json --header "Content-Type: application/json" https://www.googleapis.com/qpxExpress/v1/trips/search?key=myApiKey

[1] https://developers.google.com/qpx-express/ [2]为nodejs设计的http请求客户端:https://www.npmjs.org/package/request [3]这里是我发现的一个例子https://www.npmjs.org/package/request#multipart-related [4] QPX Express API返回400解析错误

Answer 1

我认为以下应该有效:

// fire request
request({
    url: url,
    method: "POST",
    json: requestData
}, ...

在这种情况下,Content-type: application/json标题会自动添加.

Answer 2

我在这方面工作了太久.帮助我的答案是: 发送带有node.js的Content-Type:application/json post

其中使用以下格式:

request({
    url: url,
    method: "POST",
    headers: {
        "content-type": "application/json",
        },
    json: requestData
//  body: JSON.stringify(requestData)
    }, function (error, resp, body) { ...

Answer 3

您不需要multipart,而是需要"普通"POST请求(with Content-Type: application/json).这就是你所需要的:

var request = require('request');

var requestData = {
  request: {
    slice: [
      {
        origin: "ZRH",
        destination: "DUS",
        date: "2014-12-02"
      }
    ],
    passengers: {
      adultCount: 1,
      infantInLapCount: 0,
      infantInSeatCount: 0,
      childCount: 0,
      seniorCount: 0
    },
    solutions: 2,
    refundable: false
  }
};

request('https://www.googleapis.com/qpxExpress/v1/trips/search?key=myApiKey',
        { json: true, body: requestData },
        function(err, res, body) {
  // `body` is a js object if request was successful
});

Answer 4

现在有了新的JavaScript版本(ECMAScript 6 http://es6-features.org/#ClassDefinition),有一种更好的方法来使用nodejs和Promise请求提交请求(http://www.wintellect.com/devcenter/nstieglitz/5 -reat-features-in-es6-harmony)

使用库:https: //github.com/request/request-promise

npm install --save request
npm install --save request-promise

客户:

//Sequential execution for node.js using ES6 ECMAScript
var rp = require('request-promise');

rp({
    method: 'POST',
    uri: 'http://localhost:3000/',
    body: {
        val1 : 1,
        val2 : 2
    },
    json: true // Automatically stringifies the body to JSON
}).then(function (parsedBody) {
        console.log(parsedBody);
        // POST succeeded...
    })
    .catch(function (err) {
        console.log(parsedBody);
        // POST failed...
    });

服务器:

var express = require('express')
    , bodyParser = require('body-parser');

var app = express();

app.use(bodyParser.json());

app.post('/', function(request, response){
    console.log(request.body);      // your JSON

    var jsonRequest = request.body;
    var jsonResponse = {};

    jsonResponse.result = jsonRequest.val1 + jsonRequest.val2;

    response.send(jsonResponse);
});


app.listen(3000);