CODEWITHSUNDEEP
javascriptnode.jsexpressbody-parser
sridharnetha
sridharnetha

Reputation: 2248

How do i receive post data at server same as client post data format using nodejs?

I have a post data in the format below

{"geoJSON":{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-102.038635,36.800488],[-94.567716,36.800488],[-96.149793,43.381098],[-104.060178,43.508721]]}}}

Expecting the same format on the server but received the format below

{"geoJSON":{"type":"Feature","geometry":{"type":"LineString","coordinates":[["-102.038635","36.800488"],["-94.567716","36.800488"],["-96.149793","43.381098"],["-104.060178","43.508721"]]}}}

You can see the difference in coordinates property. Double quotes are added to each value in server received coordinates array. How can I get the coordinates array same as client post data?

My application configured with expressJS and using body-parser. Any additional settings required to fix the problem?

app.use(bodyParser.urlencoded({ limit: '50mb' }));
app.use(bodyParser.json({ limit: '50mb' }));

Thanks in advance.

Upvotes: 1

Views: 81

Answers (3)

cross19xx
cross19xx

Reputation: 3487

First of all, from @bumblebeen, HTTP understands everything as a string and as such converts everything to a string. It's up to you to parse it using Number.parseInt

Also, it is irrelevant but express now ships with it's own body parser which you can use. So, rather than calling bodyParser.json, you simply call express.json

Edit

Per the comment stated, you could have a function called parseCoordinates

function parseCoordinates(coordinates) {
     return coordinates.map(inner => {
         return Array.isArray(inner) ? inner.map(elem => parseFloat(elem)) : parseFloat(inner);
     });
}

Upvotes: 0

Trần Công
Trần Công

Reputation: 298

Assum I have 

var payload = {"geoJSON":{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-102.038635,36.800488],[-94.567716,36.800488],[-96.149793,43.381098],[-104.060178,43.508721]]}}}

Using JSON.stringify(payload) to stringify this before send server.

payload = JSON.stringify(payload)
// after this code then sending payload to server

In the server using JSON.parse(payload) to use this

// server nodejs
var receivedContent = JSON.parse(payload)
// then you can using receivedContent with format you want

Upvotes: 1

vatz88
vatz88

Reputation: 2452

{"geoJSON":{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-102.038635,36.800488],[-94.567716,36.800488],[-96.149793,43.381098],[-104.060178,43.508721]]}}}

The above is actually a JavaScript Object.

{"geoJSON":{"type":"Feature","geometry":{"type":"LineString","coordinates":[["-102.038635","36.800488"],["-94.567716","36.800488"],["-96.149793","43.381098"],["-104.060178","43.508721"]]}}}

where as the above is actually a JSON.

As one of the answer suggested, whenever you send data to server, everything in the payload will automatically be converted to strings. You should cast the values as numbers.

Also, I don't think any parse would be able to do it and you should write your own code for that. The reason I say it is because, the parser would never know if the original value was a string sent by the client or was actually a number since all the keys and values will become strings.

Upvotes: 0

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