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This project is a demo of Play framework / akka-streams

Given a list of IP address in quad-octet form, produce a digest with adrresses with consecutive octet #4 values replaced with a range. The purpose of this is for white/blacklist application Both a web Ui and REST API are provided by this service

99.243.64.40
99.243.64.41
99.243.64.42
99.244.106.35
99.244.121.59
99.244.121.60
99.244.121.61
99.244.156.149

A resulting digest will be produced:

99.243.64.40-99.243.64.42
99.244.106.35
99.244.121.59-99.244.121.61
99.244.156.149

As well as plain text, JSON format may be specified:

[
  {"ip": ["99.243.64.40", "99.243.64.42"]},
  {"ip": ["99.244.106.35"]},
  {"ip": ["99.244.121.59", "99.244.121.61"]},
  {"ip": ["99.244.156.149"]}
]

  def digestFromSource(request: Source[DigestRequest,_]): Future[Seq[Try[String]]] =
    request.async via filter via digester via formatter runWith Sink.seq

+--------+    +--------+    +----------+    +-----------+    +----------+
| (1)    |    | (2)    |    | (3)      |    | (4)       |    | (5)      |
| source | => | filter | => | digester | => | formatter | => | response |
+--------+    +--------+    +----------+    +-----------+    +----------+

1. Request body is parsed into a iteration over strings, wrapped in a Source
2. Invalid (e.g., empty) elements are filtered out
3. Digester algorithm applied to entire collection (needs to be sorted and unique)
4. Results are formatted as per Accepts header / selection, JSON or Plain
5. Response body set if results available

see instructions