How to read request payload in node.js?

[#1]

Please let me know how to read request data in node.js server .

[sudheendras · Accepted solution]

Reading request payload in Apigee Edge is no different from reading the payload in a regular node.js application. Here is an example of reading payload info.

[sudheendras · Accepted solution]

Reading request payload in Apigee Edge is no different from reading the payload in a regular node.js application. Here is an example of reading payload info.

[sarthak]

You can read the payload using apigee-access module. You can learn more about it here. Using apigee-access you can read/write any variable defined in EDGE.

[#5]

Thankks, But apigee-access module is not supporting in out environment is there any other way to read request payload in node.js . Ex. When we send a post request to node.js it should read the data in the payload.

[#6]

By the way I had also posted many queries regarding the nodeJS and BaaS earlier. I tried it just now what @sudheendra1 has mentioned above but it does not work for Simple GET request too.

Here is the error which I am getting.

D:\Node Sample\node_modules\usergrid\lib\usergrid.js:112
      r.body = r.body || {};
                ^
TypeError: Cannot read property 'body' of undefined
    at Request._callback (D:\Node Sample\node_modules\usergrid\lib\usergrid.js:1
12:17)
    at self.callback (D:\Node Sample\node_modules\usergrid\node_modules\request\

I believe this error is from the usergrid itself. Any pointers in this regard? The same get works when I use usergrid request instead of createCollection and running entity specific functions.

[sudheendras]

Can you please share the entire code?

[#8]

Here is the code with ug as usergrid client.

app.get('/jokecomments', function(req, res) {
       ug.createCollection({ type: 'jokecomment' }, function(err, comments) {
        if (err) {
          res.jsonp(500, {'error': JSON.stringify(err) });
          return;
        }
        var jc = [];
        while (comments.hasNextEntity()) {
          var entity = comments.getNextEntity().get();
          var c = { 'comment': entity.comment,
                    'commentor': entity.commentor,
                    'jokeid': entity.jokeid,
'uuid': entity.uuid};
          jc.push(c);
        }
        res.jsonp(jc);
    });
});

[sudheendras]

How are you fetching "comments"?

Also it should "post", instead of "get" since you are creating an entity.

[#10]

Hey its a get.

Comments are already there. I referred the sample which you have suggested.

[sudheendras]

May be we should have a closer look at you setup. Please go ahead and raise a support ticket - http://apigee.com/about/support/portal

[#12]

@sudheendra1

This is the error I am getting

D:\Node Sample\node_modules\usergrid\lib\usergrid.js:112
      r.body = r.body || {};
                ^
TypeError: Cannot read property 'body' of undefined
    at Request._callback (D:\Node Sample\node_modules\usergrid\lib\usergrid.js:1
12:17)

It is actually strange at line 112 where 'r' is passed in callback but it is nowhere present in same local function.

[sarthak]

@Kodandapani You are using Apigee on-premise ? And are you running a more than 6 month old build ? Because apigee-access module has been made available for atleast that long I think.

I tried on a free org the following code and it is working for me :

 var apigee = require('apigee-access'); 

 http.createServer(function (request, response) { 

 var receivedMessage = apigee.getVariable(request, 'request.content');

}).listen(8124);

Is this not working for you ?

[#14]

Thanks, but apigee-access module is not supporting in our environment. Our environments are on-premise.Please let me know is there any other way to read data in node.js

[sudheendras]

@Kodandapani The example I shared above does not require "apigee-access" module. Can you try that? What version of the OPDK are you using?

[#16 · Accepted solution]

AFAIK , you need express/apigee-acces or such modules if we need to get the payload directly but if we want to use node.js to parse the req the only way is as below.

//https://nodejs.org/api/http.html#http_http_createserver_requestlistener

var svr = http.createServer(function(req, resp) {
   var body = "";
  req.on('data', function (chunk) {
    body += chunk;
  });
  req.on('end', function () {
    console.log('body: ' + body);
    var jsonObj = JSON.parse(body);
  console.log(jsonObj.test);
  })
    resp.end('Hello, World!');
});

The problem that pani has is, he is on a release which supports node.js but not apigee-access-module.

@sudheendra1 , @sarthak , Am I missing anything or do you see any issues with the above code to parse request body ?

[sudheendras]

@Maruti Chand You are right, apigee-access module is need only to get access to API proxy flow variables and caches from within Node.js application code. Otherwise you can simply use express to access request payload.

[#18]

Thanks Maruthi and Sudeendra, now we are accessing request payload in node.js by using the above code