Camunda Modeler template with Connector Scope - Defining headers

BPMN & Modeling Discussion & Questions
1

Hello,

I’m trying to add a template that allows me to define a Connector like the one you can see below.

image
image594×884 41 KB

I already tested with a GET method and it works fine, the problem is when a try to perform a POST, I can’t find a way to specify the headers that are needed (i.e. Content-Type: application/json) on my json template.

2

It seems impossible as we need a Map and this is not supported.
I tried this example but the modeler sort of crashes: it would not save the file.

[
  {
    "name": "APITask",
    "id": "com.ubanquity.task.api",
    "appliesTo": [
      "bpmn:Task"
    ],
    "properties": [],
    "scopes": {
      "camunda:Connector": {
        "properties": [
          {
            "label": "ConnectorId",
            "type": "Hidden",
            "value": "http-connector",
            "binding": {
              "type": "property",
              "name": "connectorId"
            }
          },
          {
            "label": "Method",
            "type": "Dropdown",
            "choices": [
              { "name": "GET", "value": "GET" },
              { "name": "POST", "value": "POST" },
              { "name": "PATCH", "value": "PATCH" },
              { "name": "DELETE", "value": "DELETE" }
            ],
            "value": "GET",
            "binding": {
              "type": "camunda:inputParameter",
              "name": "method"
            }
          },
          {
            "label": "URL",
            "type": "String",
            "value": "https://bpmn.io",
            "binding": {
              "type": "camunda:inputParameter",
              "name": "url"
            }
          },
          {
            "label": "Headers",
            "type": "Hidden",
            "value": {"Content-Type" : "application/json", "Authorization":"${token}"},
            "binding": {
              "type": "camunda:inputParameter",
              "name": "headers"
            }
          },          
          {
            "label": "Response",
            "type": "String",
            "value": "wsResponse",
            "binding": {
              "type": "camunda:outputParameter",
              "source": "${S(response)}",
              "scriptFormat": "freemarker"
            }
          }
        ]
      }
    }
  }
]
3

Hi @carlos.silva and @Tanios_Chahine

If it is still of interest, it is possible to define headers using Camunda templates. Since a map is not supported as a template type, you can use a script to produce a header map.

To use a script here is may not the cleanest way and may have some performance side-effects.

However, you can define a camunda:Connector property:

{
  "label": "Headers",
  "type": "String",
  "value": "var header = new java.util.HashMap();\r\nheader.put(\"Content-Type\",\"application\/json\");\r\nheader;",
  "binding": {
    "type": "camunda:inputParameter",
    "name": "headers",
    "scriptFormat": "JavaScript"
  }
}

And an exemplary script could look as follows:

var header = new java.util.HashMap();
header.put("Content-Type","application/json");
header;
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