Converting a badly stringfied json to a json object

Question

I have some data i am pulling from a web service. This is the string

(Body:'3886' MessageProperties [headers={}, timestamp=null, messageId=null, userId=null, receivedUserId=null, appId=null, clusterId=null, type=null, correlationId=null, correlationIdString=null, replyTo=null, contentType=application/x-java-serialized-object, contentEncoding=null, contentLength=0, deliveryMode=null, receivedDeliveryMode=PERSISTENT, expiration=null, priority=0, redelivered=false, receivedExchange=, receivedRoutingKey=bottomlesspit, receivedDelay=null, deliveryTag=62, messageCount=0, consumerTag=amq.ctag-sCwfLaMEqWp2GkFwFrY1yg, consumerQueue=bottomlesspit])

It looks like json but the key value pairs are almost fine but the most important key which is Body isn't like other keys as the string would tell.

I need to read the value of Body and be able to get the value like this

   console.log(d.body);
   //This above outputs the string as shown
   obj = eval('{' + d.body + '}');
   console.log(obj);
   var match = "Body";
   var val = obj.find( function(item) { return item.key == match } );
   console.log(val);

How can i read the value of the key Body?.

For just Body, would be much easier (and safer) to use a regular expression instead — CertainPerformance
– CertainPerformance, Commented May 21, 2018 at 9:36
This is neither JSON nor valid javascript, you can't eval it. You need to implement a parser or old good regex as suggested above. — Yury Tarabanko
– Yury Tarabanko, Commented May 21, 2018 at 9:38

Micolho · Accepted Answer · 2018-05-21 09:39:32Z

1

Use this regular expression instead of a match Body:

\bBody:'(\d*)'

This will catch the Body number in group 1.

answered May 21, 2018 at 9:39

Micolho

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2 Comments

Gandalf Over a year ago

I have this var str = d.body var res = str.match(\bBody:'(\d*)'); where str is the string but gives a syntax error

Micolho Over a year ago

@Gandalf is the ' seen as special caracter or changing the code?

Saeed · Accepted Answer · 2018-05-21 09:43:18Z

You can write a parser function get string and extract values. A very simple function is here. You can modify it also for all exceptions exist.

var str = `(Body:'3886' MessageProperties [headers={}, timestamp=null, messageId=null, userId=null, receivedUserId=null, appId=null, clusterId=null, type=null, correlationId=null, correlationIdString=null, replyTo=null, contentType=application/x-java-serialized-object, contentEncoding=null, contentLength=0, deliveryMode=null, receivedDeliveryMode=PERSISTENT, expiration=null, priority=0, redelivered=false, receivedExchange=, receivedRoutingKey=bottomlesspit, receivedDelay=null, deliveryTag=62, messageCount=0, consumerTag=amq.ctag-sCwfLaMEqWp2GkFwFrY1yg, consumerQueue=bottomlesspit])`;

function f(inp) {
  var index = str.indexOf(inp),
       endIndex;
  for(var i = index; i < str.length; i ++) {
    if(str[i] == ',') {
      endIndex = i;
      break;
    }
  }
  var output = str.substr(index, endIndex).split('=');
  return output;
}

console.log(f('consumerQueue'));

Aidan Fewster · Accepted Answer · 2018-05-21 09:44:22Z

1

Why not use a regex to match and extract the Body.

Example:

const match = d.body.match(/Body:\'(.+)\'/)
if (match) {
  const body = match[1] // This is the value of Body
} else {
   // Unable to find Body, handle it here
}

answered May 21, 2018 at 9:44

Aidan Fewster

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