Docusign Webhook POST API - how to get body?

When you follow the built in Web API example "Start Process", most of the things should already be set up. Can you share the code of the web API Appian object?

Not sure what you mean with "Start Trigger Panel" ...

here's the code that came with the start process Web Api.  I see the http!request body is supposed to get populated into the processParameters dictionary, but I can't figure out how to access it from there.

By "Start Trigger Panel", I was playing with the Start options in the process, to see if I was supposed to configure the message body into something there.

a!startProcess(
  processModel: cons!WMO_Docusign_Receive,
  processParameters: a!fromJson(
    http!request.body
  ),
  onSuccess: a!httpResponse(
    statusCode: 200,
    headers: {
      a!httpHeader(name: "Content-Type", value: "application/json")
    },
    body: a!toJson(
      fv!processInfo
    )
  ),
  onError: a!httpResponse(
    statusCode: 500,
    headers: {
      a!httpHeader(name: "Content-Type", value: "application/json")
    },
    body: a!toJson(
      {
        error: "There was an error starting the process"
      }
    )
  )
)

And if I manally paste the Docusign http body into my API configuration Test screen, it does convert it properly. I just don't know how to access that in the process.

I understand. I think the example code is a bit ... unfortunately chosen.

It just passes the decoded JSON structure to the process. Now, the process model needs to provide multiple process variables, configured as parameters, to accept the individual top level values.

So, if the JSON response looks like this:

{
  "alpha": "one",
  "beta": {
    "one": 1,
    "two": 2
  },
  "gamma": 12345
}

... your process needs three parameter variables alpha, beta and gamma of the types Text, Map and Integer.

You could also change the code in the API to pass the whole structure into a single variable.

processModel: cons!WMO_Docusign_Receive,
processParameters: {
  your_process_variable: a!fromJson(
    http!request.body
  )
}

... then create one process variable named "your_process_variable" of type Map and make it a parameter.

I would actually suggest not doing a!fromJson before starting the process (in the odd event that there is something wrong with the json that was sent) that prevents the process from starting.

Have one start parameter for your process (i.e. json) and parse the json using a!fromJson in a script task.

I would actually suggest not doing a!fromJson before starting the process (in the odd event that there is something wrong with the json that was sent) that prevents the process from starting.

Have one start parameter for your process (i.e. json) and parse the json using a!fromJson in a script task.

That has the drawback that, in case the JSON is invalid, you have a failed process instance you need to take care of.

I try to add input data validation code directly to the API to only start further processing if the incoming data is good.