greensync/json-sequence

Push parser for RFC7464 JSON Sequences

JsonSequence

A push parser for RFC7464 JSON Text Sequences

Usage

The parser is intended for use in scenarios where data is being streamed in chunks, either from the file system or from the network. As each new chuck of data is received it is pushed to the parser, which will yield the parsed values contained within.

require 'net/http'
require 'json_sequence'

uri = URI('http://example.com/json_sequence')
parser = JsonSequence::Parser.new

Net::HTTP.start(uri.host, uri.port) do |http|
  request = Net::HTTP::Get.new uri

  http.request request do |response|
    response.value # raises if not success

    response.read_body do |chunk|
      parser.parse(chunk) do |result|
        case result
        when JsonSequence::Result::Json
          puts "received record: #{result.value.inspect}"
        when JsonSequence::Result::MaybeTruncated
          puts "received possibly truncated record: #{result.value.inspect}"
        when JsonSequence::Result::ParseError
          puts "stream contained invalid record: #{result.record}, caused by: #{result.error.message}"
        end
      end
    end
  end
end

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.