gatling + how to send post with json payload?

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vijayakumar eswaran

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Jan 31, 2020, 9:00:11 AM1/31/20
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hi all,

I am looking for inputs on sending POST http request with json as a request payload. if anyone has come across this use case or worked already, please do share the sample script.

Thanks,
Vijay

vijayakumar eswaran

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Jan 31, 2020, 9:22:38 AM1/31/20
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I have been trying the below (captured from the online sources), but it end up in error.

.post("/platform/spi/job/v2/post")
.bodyPart(RawFileBodyPart("jobjson","data/job.json").contentType("application/json").fileName("job.json")).asJson


<html><head>
<title>400 Bad Request</title>
</head><body>
<h1>Bad Request</h1>
<p>Your browser sent a request that this server could not understand.<br />
</p>
<hr>
<address>Apache Server at www.xxx.xxxx Port 443</address>
</body></html>

Stéphane LANDELLE

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Jan 31, 2020, 9:23:44 AM1/31/20
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Pretty sure you're confusing a simple body and multipart (what you currently do).

Logo Stéphane Landelle
Chief Technical Officer
twitter: @slandelle
site: gatling.io




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Stéphane LANDELLE

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Jan 31, 2020, 9:25:22 AM1/31/20
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vijayakumar eswaran

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Jan 31, 2020, 9:52:55 AM1/31/20
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I would like to post a http request with json request body fed in.  
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vijayakumar eswaran

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Jan 31, 2020, 10:57:02 AM1/31/20
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thanks for the video link and I went through and tried below. end result is same. I am pretty sure, not doing the right thing here. any help would be highly appreciated.


.exec(http("postAJob")
  .post("/platform/spi/job/v2/post")
   .body(StringBody("""{"jobType":"R","jobStartDate":"2020-01-31","jobEndDate":"","attr-job_startDate_flexible":false,"schedule":[{"id":"sunday","times":[{"start":"08:00","end":"17:00"}]},{"id":"tuesday","times":[{"start":"08:00","end":"17:00"}]}],"attr-job_varyingSchedule":true,"jobZip":"02451","kids":[{"ccAgeGroups":"CHLDAGEGP004"}],"attr-job_lightHousekeeping":true,"attr-job_mealPreparation":false,"attr-job_laundry":false,"attr-job_homeworkHelp":false,"attr-job_errandsOrGroceries":false,"attr-job_comfortableWithPets":true,"collegeDegree":false,"attr-job_firstAidOrCPR":false,"attr-job_dropPickupChildren":false,"attr-job_own_transportation":false,"attr-job_nonSmoker":false,"jobRate":{"lowerValue":"12","higherValue":"17"},"serviceId":"CHILDCARE"}"""))
  .headers(headers_2)
  .check(bodyString.saveAs("jobresponse"))
)

Stéphane LANDELLE

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Jan 31, 2020, 10:58:15 AM1/31/20
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Missing Content-Type request header maybe?


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Chief Technical Officer
twitter: @slandelle
site: gatling.io



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vijayakumar eswaran

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Jan 31, 2020, 11:26:33 AM1/31/20
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exactly, thanks a lot for your quick response and help! much appreciated.

vijayakumar eswaran

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Jan 31, 2020, 11:32:31 AM1/31/20
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quick question:

is there any example that I can refer to pass the json file at run time through json feeder and not hard code it in the main script?

Thanks,
Vijay

George Kandalepas

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Jan 31, 2020, 11:40:30 AM1/31/20
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Hey Vijay,

you can try this:
.post("idm/api/v1/someservice")
.headers(sessionHeaders)
.body(ElFileBody("bodies/someservice_body.json")).asJson
.check(bodyString.saveAs("BODY"))

and in the body directory you will have your json payload:

someservice_body.json
{
  "firstName": "George",
  "displayName": "_george_",
  "userDescription": "performance engineer"
}

and you can randomize these fields with a random feeder

-George

George Kandalepas

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Jan 31, 2020, 12:04:43 PM1/31/20
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To add to my previous post you can randomize your json and use as a body as follows:

createUsers.scala
import scala.util.Random

import io.gatling.core.Predef._
import io.gatling.core.structure.ChainBuilder
import io.gatling.http.Predef._

object createUsers extends Simulation{
  
  val rndNumb = (10000 to 100000000).iterator

  def randomString(length: Int):String = {
    rnd.alphanumeric.filter(_.isLetter).take(length).mkString
  }

  val custRandUserFeeder: Iterator[Map[String, String]] = Iterator.continually(Map(
    "mediumRandString" -> randomString( 15 ),
    "smallRandString" -> randomString(5),
    "longRandString" -> randomString( 200 ),
    "randomUserPrefix" -> ("George" + rndNumb.next()),
  ))

  def createNewUser: ChainBuilder = {
   feed(custRandUserFeeder)
    .exec(http("Create New User")
      .post("idm/api/v1/createuser")
      .headers(sessionHeaders)
      .body(ElFileBody("bodies/createUserTemplate.json")).asJson
      .check(bodyString.saveAs("BODY"))
      .check(jsonPath("$['name']").exists.saveAs("newName"))
    )
  }
}

user_body.json
{
  "firstName": "${randomUserPrefix}${smallRandomString}",
  "lastName": "Kand${smallRandString}",
  "roles": [
    {
      "name": "CONSUMER"
    }
  ],
  "locale": "en_US",
  "userId": "gkandale${mediumRandString}",
  "email": "gkandale${mediumRandString}@acme.com",
  "description": "${longRandString}",
  "pwdPolicyname": "strict_auth",
  "status": "true"
}

Please excuse any typos!!
-GeorgeK

vijayakumar eswaran

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Jan 31, 2020, 12:16:26 PM1/31/20
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great, precisely what I was looking for. will give it a try and get back.

thank you GeorgeK!
  "email": "gkandale${mediumRa...@acme.com",

George Kandalepas

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Jan 31, 2020, 12:28:12 PM1/31/20
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BTW, the bodies directory should be in the resources directory. By default Gatling looks in resources dir to find the these types of files.

I hope it works out for you!

-George

vijayakumar eswaran

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Feb 3, 2020, 3:15:12 AM2/3/20
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thanks a lot George, it worked! appreciate your help in this regard.

George Kandalepas

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Feb 3, 2020, 11:14:06 AM2/3/20
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I'm glad i could help!!

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George Kandalepas

George Kandalepas

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Feb 3, 2020, 11:15:11 AM2/3/20
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Glad I could help Vijay!

tech stuff

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Apr 6, 2020, 9:07:15 AM4/6/20
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I  do have a same scenario of sending json requests from resources to my scala file.One issue is,does it work with https requests also?.Help me on sending json data fles to a HTTPS requests.

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