Code 400 when add cpmment via REST

[aas]

Hello everybody. I try to comment Issue via REST API and have 400 code, which means input is invalid. 

http.request(POST, ContentType.JSON) {
    requestContentType = ContentType.JSON
    request.addHeader("authorization: Basic ${authString}", "ContentType: application/json")
    body = ["body": "${commentBody}"]
    response.success = { resp, reader ->
        log.warn("Issue commented successfully " + resp.status.toString())
    }

    response.failure = { resp ->
        log.warn(resp.status)
    }
}

But via curl it works

curl -i -u "user:password" -H "Content-type: application/json" -H "Accept: application/json" -d"{\"body\":\"Comment via REST API \"}" -X POST https://{jiraAddress}/rest/api/2/issue/{issueId}/comment -o myfile.txt

Even when I add all parameters mentioned here https://docs.atlassian.com/software/jira/docs/api/REST/8.5.0/?_ga=2.28212924.1450405182.1572234190-188386877.1559530511#api/2/issue-addComment I have 400 code

[Hana Kučerová · Accepted solution]

Hi,

I believe, the problem is that you don't send valid JSON in your request body (that's why the input is invalid, because it is not possible to parse it)

Is your request's body transformed automatically and correctly to JSON? 

It should look like this:

{"body" : "test message"}

[Hana Kučerová]

Hi,

I've tried to debug it a little bit more.

Instead of 

body = ["body": "${commentBody}"]

try

body = [body: "${commentBody}"]

 It works for me.

[aas]

Hi Hana! Thanks for help. The error message was 

{errorMessages=[Can not deserialize instance of com.atlassian.jira.issue.fields.rest.json.beans.CommentJsonBean out of START_ARRAY token
 at [Source: org.apache.catalina.connector.CoyoteInputStream@1f0c4ce0; line: 1, column: 1]]}

I've just removed everything unnecessary from request body and now it works 

body = ["body": commentBody] 

The commentBody was defined above like 

Comment comment = commentManager.getLastComment(event.getIssue())
String commentBody = comment.getBody()