Ronin Ronin - 5 months ago 57
JSON Question

pass JSON to HTTP POST Request

I'm trying to make a HTTP POST request to the google QPX Express API [1] using nodejs and request [2].

My code looks as follows:

// 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)
}
})


What I'm trying to do is passing the JSON using the multipart argument [3].
But instead of the proper JSON response I got an error (400 undefined).

When I make a request using the same JSON and API Key using CURL instead, it works fine. So there's nothing wrong with my API key or JSON.

What's wrong with my code?

EDIT:

working CURL example:

i) I saved the JSON which I would pass to my request into a file called "request.json":

{
"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) then, in the terminal I switched to the directory in which the newly created request.json file was located and run (myApiKey stands for my actual API Key obviously):

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] a http request client designed for nodejs: https://www.npmjs.org/package/request
[3] here is an example I found https://www.npmjs.org/package/request#multipart-related
[4] QPX Express API is returning 400 parse error

Answer

I think the following should work:

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

Another solution according to the docs would be to use

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

In this case, the Content-type: application/json header is automatically added.

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