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post_agent.rb 4.1KB

    module Agents class PostAgent < Agent include WebRequestConcern cannot_create_events! default_schedule "never" description <<-MD A Post Agent receives events from other agents (or runs periodically), merges those events with the [Liquid-interpolated](https://github.com/cantino/huginn/wiki/Formatting-Events-using-Liquid) contents of `payload`, and sends the results as POST (or GET) requests to a specified url. To skip merging in the incoming event, but still send the interpolated payload, set `no_merge` to `true`. The `post_url` field must specify where you would like to send requests. Please include the URI scheme (`http` or `https`). The `method` used can be any of `get`, `post`, `put`, `patch`, and `delete`. By default, non-GETs will be sent with form encoding (`application/x-www-form-urlencoded`). Change `content_type` to `json` to send JSON instead. Change `content_type` to `xml` to send XML, where the name of the root element may be specified using `xml_root`, defaulting to `post`. Other Options: * `headers` - When present, it should be a hash of headers to send with the request. * `basic_auth` - Specify HTTP basic auth parameters: `"username:password"`, or `["username", "password"]`. * `disable_ssl_verification` - Set to `true` to disable ssl verification. * `user_agent` - A custom User-Agent name (default: "Faraday v#{Faraday::VERSION}"). MD event_description "Does not produce events." def default_options { 'post_url' => "http://www.example.com", 'expected_receive_period_in_days' => '1', 'content_type' => 'form', 'method' => 'post', 'payload' => { 'key' => 'value', 'something' => 'the event contained {{ somekey }}' }, 'headers' => {} } end def working? last_receive_at && last_receive_at > interpolated['expected_receive_period_in_days'].to_i.days.ago && !recent_error_logs? end def method (interpolated['method'].presence || 'post').to_s.downcase end def validate_options unless options['post_url'].present? && options['expected_receive_period_in_days'].present? errors.add(:base, "post_url and expected_receive_period_in_days are required fields") end if options['payload'].present? && !options['payload'].is_a?(Hash) errors.add(:base, "if provided, payload must be a hash") end unless %w[post get put delete patch].include?(method) errors.add(:base, "method must be 'post', 'get', 'put', 'delete', or 'patch'") end if options['no_merge'].present? && !%[true false].include?(options['no_merge'].to_s) errors.add(:base, "if provided, no_merge must be 'true' or 'false'") end unless headers.is_a?(Hash) errors.add(:base, "if provided, headers must be a hash") end validate_web_request_options! end def receive(incoming_events) incoming_events.each do |event| outgoing = interpolated(event)['payload'].presence || {} if boolify(interpolated['no_merge']) handle outgoing, event.payload else handle outgoing.merge(event.payload), event.payload end end end def check handle interpolated['payload'].presence || {} end private def handle(data, payload = {}) url = interpolated(payload)[:post_url] headers = headers() case method when 'get', 'delete' params, body = data, nil when 'post', 'put', 'patch' params = nil case interpolated(payload)['content_type'] when 'json' headers['Content-Type'] = 'application/json; charset=utf-8' body = data.to_json when 'xml' headers['Content-Type'] = 'text/xml; charset=utf-8' body = data.to_xml(root: (interpolated(payload)[:xml_root] || 'post')) else body = data end else error "Invalid method '#{method}'" end faraday.run_request(method.to_sym, url, body, headers) { |request| request.params.update(params) if params } end end end