Post with JSON data

[BenjaminKang]

Can someone point me in the right direction on how to leverage locust to make a Post to an API endpoint that is expecting JSON data?

[daubman]

client is mostly just a requests object
Basic post example:
http://docs.locust.io/en/latest/quickstart.html?highlight=post

Extended post use (including mentioning data, which is what you want for JSON as dict):
http://docs.locust.io/en/latest/api.html#locust.clients.HttpSession.post

Requests documentation showing post of json examples:
http://docs.python-requests.org/en/latest/user/quickstart/#more-complicated-post-requests

[ghost]

was getting HTTP415 until i read that last link

payload = {'some':'payload'}
headers = {'content-type': 'application/json'}
r = l.client.post("/post/endpoint", data=json.dumps(payload), headers=headers, catch_response=True)

specifying content type may be optional, if you don't care about the response.

[osyvokon]

Shorter solution is

payload = {"some": "payload"}
r = l.client.post("/post/endpoint", json=payload)

This will encode JSON and set headers for you.

[SehgalDivij]

doesn't work. only HTTP 500 errors show up.

[MarcSteven]

@cyberw When post with json and add headers, always 500....

[Alfex4936]

rather than using json.dumps, we can try to pass string as data parameter

MY_JSON = """
{
  "intent": {
    "id": "123",
    "name": "456"
  }
}
"""

class LoadTesting(HttpUser):
    @task
    def parse_last_notice(self):
        self.client.post("/somewhere", data=MY_JSON )