Support Nested Hashes in HTTP output mapping

[jordansissel]

(This issue was originally filed by @GABeech at elastic/logstash#1323)

---

I would like the ability to have nested hashes when using the mapping function of the HTTP output.

given:
mapping => [ "metric", "test", "tags", [ "name", "Help", "type", "Please"]

The current json output would be:

{
   "metric": "test",
   "tags": "["name","Help","type","Please"]"
}

What I would expect would be:

{
  "Metric": "test",
  "tags": {
    "name": "Help",
    "type": "Please"
  }
}

[nzlosh]

Hi @jordansissel

From what I can tell the initial pull request was made against the elastic/logstash repo and you've linked the issue here but I don't see the commit being cherry-picked for integration in the logstash-plugins/logstash-output-http repo.

Is there a blocker on the original commit? I'm asking because I see nested hash functionality as allowing me to push events to various rest api end points, that I don't control, from our ELK stack installation.

[cezarypiatek]

Is it possible to achieve output json that contains array? Something like that:

{
  "Metric": "test",
  "tags": ["tag1", "tag2"]
}