POSTMAN - How to set environment value for nested object in single request?

Question

Im trying to sign few fields and send the signed field as another field in an request.that is inside of an nested object..Im trying to setEnvironmentvariable but it is setting the same value again..

{
"id" : "1234",
"ref" : "REF05",
"details": [
        {
            "traceNumber": "201902120005",
            "amount": "100",
            "customerNumber": "0924",
            "signature": "{{signature}}"
        },
              {
            "traceNumber": "201902120007",
            "amount": "120",
            "customerNumber": "0739",
            "signature": "{{signature}}"
        }
     ],
 "date": "20210619"
}

Im signing traceNumber+amount+customerNumber fields by private key and passing the value to signature fields which works fine with single object. if i try with multiple objects it just set the last calculated signature.

if (globals['jsrsasign-js'] === undefined) {
    console.log("jsrasign library not already downloaded. Downloading now. ")

    pm.sendRequest({
        url: "http://kjur.github.io/jsrsasign/jsrsasign-latest-all-min.js",
        method: "GET",
        body: {}
    }, function(err, res) {
        postman.setGlobalVariable("jsrsasign-js", res.text());
        doHttpSig();
    });

} else {
    doHttpSig();
}

function doHttpSig() {
    var navigator = {}; //fake a navigator object for the lib
    var window = {}; //fake a window object for the lib
    eval(postman.getGlobalVariable("jsrsasign-js"));
    let pk = postman.getGlobalVariable("PRIVATEKEY")
    let pks = pk.split(/\\n/)
    //console.log("pkss Key", pks);
    privateKey = ""
    for (let i = 0; i < pks.length; i++) {
        privateKey += pks[i] + "\n"
    }
    
    var reqBody = JSON.parse(request.data);

    for (let i = 0; i<reqBody.details.length; i++) {
    var fields = reqBody.ref+reqBody.details[i].traceNumber+reqBody.details[i].amount+reqBody.details[i].customerNumber;
    var signature_algo = "SHA1withDSA";
    var payload = fields;
    var sig = new KJUR.crypto.Signature({
        "alg": signature_algo
    });
    sig.init(privateKey);

    sig.updateString(payload);
    var sigValueHex = sig.sign();
    var sigBase64 = hextob64(sigValueHex);

    postman.setEnvironmentVariable("signature", sigBase64);
    } 
}

This is my postman prescript. some one pls let know hoe to acheive this.

could you make it more simple , what you mean by multiple object here ? — PDHide, Jun 21 '21 at 06:21
in which field? could you add more example and a simple reproducible example — PDHide, Jun 21 '21 at 07:53

score 0 · Answer 1 · answered Dec 08 '21 at 15:01

I want to add SettlementValues object in the Environment variable and when I add, I see the value as [object,Objet] instead of complex object.

var settlementValues = new Object();
   var requestData = pm.request.body.raw;
   var requestjson=JSON.parse(requestData);
     
    settlementValues.TransactionCode=requestjson.ProcessingCode.TransactionCode;
    settlementValues.TransactionAmount= requestjson.TransactionAmount.Amount;
    settlementValues.ReferenceNumber=requestjson.RetrievalReferenceNumber;
    settlementValues.BanknetReferenceNumber=requestjson.NormalizedData.MastercardData.BanknetReferenceNumber;
    console.log(settlementValues);
    pm.environment.set("SETTLEMENTOBJECT",settlementValues);

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POSTMAN - How to set environment value for nested object in single request?

1 Answers1