[Console] Date Math in Index Names requires URI-encoding

[pickypg]

Attempting to query Elasticsearch using Date math in the index pattern, such as

GET /<logstash-{now/d}>/_search

Results in a weird error:

{
  "error": {
    "root_cause": [
      {
        "type": "index_not_found_exception",
        "reason": "no such index",
        "resource.type": "index_or_alias",
        "resource.id": "<logstash-{now",
        "index_uuid": "_na_",
        "index": "<logstash-{now"
      }
    ],
    "type": "index_not_found_exception",
    "reason": "no such index",
    "resource.type": "index_or_alias",
    "resource.id": "<logstash-{now",
    "index_uuid": "_na_",
    "index": "<logstash-{now"
  },
  "status": 404
}

This is because it needs to be URI-encoded. The real issue is that the inner / needs to be URI-encoded.

GET /%3Clogstash-%7Bnow%2Fd%7D%3E/_search
{
  "query" : {
    "match": {
      "test": "data"
    }
  }
}

For anyone running into this issue that is lazy like me, you can use the functional equivalent without any encoding:

GET /<logstash-{now}>/_search

Because the date format string is going to be 2017-01-16 (or whatever it happens to be today), it doesn't matter if you chopped off the time or not.

[jbudz]

Tracking at #8567