ExpressJS Fetching value from nested JSON Object

Question

I am using ExpressJS..When trying to fetch value from the req.body, in the console.log(req.body[ndx])(it prints { " c o..... like this as single character)

for (var ndx in req.body){
    console.log(req.body[ndx]);
}

My req.body has the below nested JSON Object: How to extract count? req.body["count"] outputs undefined

{"count":1,"totalCount":38,"node":[{"categories":[],"foreignSource":null,"foreignId":null,"label":"172.20.96.20","assetRecord":{"description":null,"operatingSystem":null,"category":"Unspecified","password":null,"id":2655,"username":null,"vmwareManagedEntityType":null,"vmwareManagementServer":null,"numpowersupplies":null,"hdd6":null,"hdd5":null,"hdd4":null,"hdd3":null,"hdd2":null,"hdd1":null,"storagectrl":null,"thresholdCategory":null,"enable":null,"connection":null,"autoenable":null,"cpu":null,"ram":null,"snmpcommunity":null,"rackunitheight":null,"admin":null,"additionalhardware":null,"inputpower":null,"vmwareManagedObjectId":null,"vmwareState":null,"vmwareTopologyInfo":null,"circuitId":null,"assetNumber":null,"rack":null,"slot":null,"region":null,"division":null,"department":null,"building":null,"floor":null,"room":null,"vendorPhone":null,"manufacturer":null,"vendor":null,"modelNumber":null,"supportPhone":null,"maintcontract":null,"maintContractNumber":null,"maintContractExpiration":null,"displayCategory":null,"notifyCategory":null,"pollerCategory":null,"vendorFax":null,"vendorAssetNumber":null,"lastModifiedBy":"","lastModifiedDate":1433277477504,"dateInstalled":null,"lease":null,"leaseExpires":null,"managedObjectInstance":null,"managedObjectType":null,"serialNumber":null,"port":null,"comment":null},"lastCapsdPoll":1433277477793,"createTime":1433277477504,"labelSource":"A","type":"A","id":"10"}]}

My Code:

var bodyParser = require('body-parser'); 
var urlencodedParser = bodyParser.urlencoded({ extended: true });
app.use('/index', function(req, res, next){
        var getReq = http.request(options, function(res) {
        res.setEncoding('utf8');
        res.on('data', function (chunk) {
            jsnArry += chunk; 
         });     
        res.on('end', function (chunk) {         
                req.body = jsnArry;
            for (var ndx in req.body){
                console.log(req.body[ndx]);
            }
            next();
        });
        }).end();
});
app.use(bodyParser.json({ type: 'application/*+json' }));   

app.use('/index', urlencodedParser, function(req, res, next){
    res.send(req.body);
     next();
});

console.log(JSON.parse(req.body)) o/p below ones

{ count: 1,
  totalCount: 38,
  node:
   [ { categories: [],
       foreignSource: null,
       foreignId: null,
       label: '172.20.96.20',
       assetRecord: [Object],
       lastCapsdPoll: 1433277477793,
       createTime: 1433277477504,
       labelSource: 'A',
       type: 'A',
       id: '10' } ] }

var options = {
          host: host,
          method: 'GET',
          headers: {
              'Accept' : 'application/json'
          }
    };

res.json(info["totalCount"]);
res.sendFile(path.join(_dirname, '/html', 'index.html'));

//Only shows the res.json value not the html page

Below is my html file:

<!DOCTYPE html>
<html data-ng-app="shopStore">
<head>
<meta charset="ISO-8859-1">
<title>Simple Angular Testing</title>
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css"></link>
<link rel="stylesheet" type="text/css" href="css/main.css"></link>
</head>
<body>
    <script type="text/javascript" src="js/lib/angular.min.js"></script>
    <script type="text/javascript" src="js/lib/d3.min.js"></script>
    <script type="text/javascript" src="js/product.js"></script>
    <script type="text/javascript" src="js/app.js"></script>

    <div data-ng-controller="scopeCtrl">
        <div data-ng-repeat="x in newRec"> 
            <p>I am product seller {{x.Name}} in {{x.City}} @ {{x.Country}}</p>
        </div>
        {{newRec[0].Name}}  
    </div>

    <div data-ng-controller="nmsCtrl">
     <p>Data to display</p>
    <!--    <div data-ng-repeat="jsn in jsnData"> 
            <p>I am product seller {{jsn.count}} displayed out of {{jsn.totalCount}}</p>
        </div> -->
    </div>  

    <div data-ng-controller="Store-Controller as store">
      <div data-ng-repeat="product in store.products">
        <div data-ng-hide='product.cantPur'>
            <h6>Product:::{{product.item}}</h6>
            <h6>Dollar Price:::{{product.dollar | currency}}</h6>
            <h6>Description::::{{product.desc}}</h6>
            <h6>{{review.stars}}</h6>
            <button data-ng-show='product.canAdd'>Add to Cart</button>
            <product-panel></product-panel>
        </div>
       </div>
    </div>
</body>
</html>

Can you output the result of console.log(typeof res.body); ? — Pierre Inglebert
– Pierre Inglebert, Commented Jun 13, 2015 at 17:10

Firdaus Ramlan · Accepted Answer · 2015-06-13 17:29:49Z

1

Do you include body-parsing middleware? body-parser support JSON parsing.

var app = require('express')();
var bodyParser = require('body-parser');
app.use(bodyParser.json());

bodyParser.json also expect to receive payload in application/json content type. Example using jQuery ajax:

.ajax({
  url:url,
  type:"POST",
  data:data,
  contentType:"application/json; charset=utf-8",
  dataType:"json",
  success: function(){
    ...
  }
})

edited Jun 13, 2015 at 17:29

answered Jun 13, 2015 at 17:12

Firdaus Ramlan

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13 Comments

User183 Over a year ago

I am already using body-parsing middleware..This is how my code looks

User183 Over a year ago

My typeof req.body outputs String

Firdaus Ramlan Over a year ago

how do you send the payload request? The content type should be application/json instead of application/x-www-form-urlencoded. See my edited answer.

Firdaus Ramlan Over a year ago

you should use parser before the request handler. Move app.use(bodyParser.json({ type: 'application/*+json' })); to line 3.

User183 Over a year ago

Moved to line 3, it outputs character by character for console.log(req.body[ndx])

|

Robert Moskal · Accepted Answer · 2015-06-13 18:50:00Z

0

You probably need to convert the req.body into json using

bar myRes= JSON.parse(req.body);
console.log(myRes.count);

This should be done for you automatically. How is your bodyParser middleware set uup?

It should be set up as in the next post.

edited Jun 13, 2015 at 18:50

answered Jun 13, 2015 at 17:12

Robert Moskal

22.7k8 gold badges69 silver badges91 bronze badges

8 Comments

User183 Over a year ago

Nope i tried this before, its not able to indentify parse keyword itself.

Robert Moskal Over a year ago

Meaning you are unable to call the parse function itself?

User183 Over a year ago

I tried console.log(JSON.parse(chunk)) which outputs unexpected token at Object.parse

User183 Over a year ago

but JSON.parse(req.body) outputs value, added the o/p in my question. please check

Robert Moskal Over a year ago

See the edit to my post above. That doesn't do it for you.

|

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