server {
    listen 4243;

    location /api/config/filters {
        content_by_lua_block {
            ngx.header.content_type = 'application/json';
            local raw = [[
{
  "iliteral_or": {
      "examples": "host=iliteral_or(web01),  host=iliteral_or(web01|web02|web03)  {\"type\":\"iliteral_or\",\"tagk\":\"host\",\"filter\":\"web01|web02|web03\",\"groupBy\":false}",
      "description": "Accepts one or more exact values and matches if the series contains any of them. Multiple values can be included and must be separated by the | (pipe) character. The filter is case insensitive and will not allow characters that TSDB does not allow at write time."
  },
  "wildcard": {
      "examples": "host=wildcard(web*),  host=wildcard(web*.tsdb.net)  {\"type\":\"wildcard\",\"tagk\":\"host\",\"filter\":\"web*.tsdb.net\",\"groupBy\":false}",
      "description": "Performs pre, post and in-fix glob matching of values. The globs are case sensitive and multiple wildcards can be used. The wildcard character is the * (asterisk). At least one wildcard must be present in the filter value. A wildcard by itself can be used as well to match on any value for the tag key."
  },
  "not_literal_or": {
      "examples": "host=not_literal_or(web01),  host=not_literal_or(web01|web02|web03)  {\"type\":\"not_literal_or\",\"tagk\":\"host\",\"filter\":\"web01|web02|web03\",\"groupBy\":false}",
      "description": "Accepts one or more exact values and matches if the series does NOT contain any of them. Multiple values can be included and must be separated by the | (pipe) character. The filter is case sensitive and will not allow characters that TSDB does not allow at write time."
  },
  "not_iliteral_or": {
      "examples": "host=not_iliteral_or(web01),  host=not_iliteral_or(web01|web02|web03)  {\"type\":\"not_iliteral_or\",\"tagk\":\"host\",\"filter\":\"web01|web02|web03\",\"groupBy\":false}",
      "description": "Accepts one or more exact values and matches if the series does NOT contain any of them. Multiple values can be included and must be separated by the | (pipe) character. The filter is case insensitive and will not allow characters that TSDB does not allow at write time."
  },
  "not_key": {
      "examples": "host=not_key()  {\"type\":\"not_key\",\"tagk\":\"host\",\"filter\":\"\",\"groupBy\":false}",
      "description": "Skips any time series with the given tag key, regardless of the value. This can be useful for situations where a metric has inconsistent tag sets. NOTE: The filter value must be null or an empty string."
  },
  "iwildcard": {
      "examples": "host=iwildcard(web*),  host=iwildcard(web*.tsdb.net)  {\"type\":\"iwildcard\",\"tagk\":\"host\",\"filter\":\"web*.tsdb.net\",\"groupBy\":false}",
      "description": "Performs pre, post and in-fix glob matching of values. The globs are case insensitive and multiple wildcards can be used. The wildcard character is the * (asterisk). Case insensitivity is achieved by dropping all values to lower case. At least one wildcard must be present in the filter value. A wildcard by itself can be used as well to match on any value for the tag key."
  },
  "literal_or": {
      "examples": "host=literal_or(web01),  host=literal_or(web01|web02|web03)  {\"type\":\"literal_or\",\"tagk\":\"host\",\"filter\":\"web01|web02|web03\",\"groupBy\":false}",
      "description": "Accepts one or more exact values and matches if the series contains any of them. Multiple values can be included and must be separated by the | (pipe) character. The filter is case sensitive and will not allow characters that TSDB does not allow at write time."
  },
  "regexp": {
      "examples": "host=regexp(.*)  {\"type\":\"regexp\",\"tagk\":\"host\",\"filter\":\".*\",\"groupBy\":false}",
      "description": "Provides full, POSIX compliant regular expression using the built in Java Pattern class. Note that an expression containing curly braces {} will not parse properly in URLs. If the pattern is not a valid regular expression then an exception will be raised."
  }
}
]]
        }
}