Post with JSON data

Overview

Sending POST requests is very easy using LoadForge. With JSON data you need to apply a small amount of parsing to it before you post. The below example will submit a simple payload to a URL.

You will see we use json.dumps(payload) to process the payload array, and we set the header Content Type to application/json.

Code

import time, json
from locust import HttpUser, task, between

class QuickstartUser(HttpUser):
    wait_time = between(3, 5)

    @task(1)
    def api_page(self):
        payload = {
            'key': 'value'
            'question': 'answer123'
        }
        
        headers = {'content-type': 'application/json'}
        
        response = self.client.post("/post/endpoint", data=json.dumps(payload), headers=headers)