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Add output_mode to PostAgent

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This allows to merge the contents of the the emitted event into
the received event by setting this option to `merge`.
This commit is contained in:
Christian Hein 2017-07-25 23:37:50 -03:00
parent 4cf58ebbd3
commit 463aba9584
2 changed files with 54 additions and 3 deletions
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17
app/models/agents/post_agent.rb
View file

@ -30,6 +30,9 @@ module Agents
If `emit_events` is set to `true`, the server response will be emitted as an Event and can be fed to a WebsiteAgent for parsing (using its `data_from_event` and `type` options). No data processing
will be attempted by this Agent, so the Event's "body" value will always be raw text.
The Event will also have a "headers" hash and a "status" integer value.
If `output_mode` is set to `merge`, the emitted Event will be merged into the original contents of the received Event.
Set `event_headers_style` to one of the following values to normalize the keys of "headers" for downstream agents' convenience:
* `capitalized` (default) - Header names are capitalized; e.g. "Content-Type"
@ -60,6 +63,8 @@ module Agents
},
"body": "<html>Some data...</html>"
}
Original event contents will be merged when `output_mode` is set to `merge`.
MD
def default_options
@ -74,7 +79,8 @@ module Agents
},
'headers' => {},
'emit_events' => 'false',
'no_merge' => 'false'
'no_merge' => 'false',
'output_mode' => 'clean'
}
end
@ -122,6 +128,10 @@ module Agents
errors.add(:base, "if provided, no_merge must be 'true' or 'false'")
end
if options['output_mode'].present? && !options['output_mode'].to_s.include?('{') && !%[clean merge].include?(options['output_mode'].to_s)
errors.add(:base, "if provided, output_mode must be 'clean' or 'merge'")
end
unless headers.is_a?(Hash)
errors.add(:base, "if provided, headers must be a hash")
end
@ -210,11 +220,12 @@ module Agents
}
if boolify(interpolated['emit_events'])
create_event payload: {
new_event = interpolated['output_mode'].to_s == 'merge' ? event.payload.dup : {}
create_event payload: new_event.merge(
body: response.body,
headers: normalize_response_headers(response.headers),
status: response.status
}
)
end
end
end

40
spec/models/agents/post_agent_spec.rb
View file

@ -292,6 +292,20 @@ describe Agents::PostAgent do
@checker.check
expect(@checker.events.last.payload['headers']).to eq({ 'content_type' => 'text/html' })
end
context "when output_mode is set to 'merge'" do
before do
@checker.options['output_mode'] = 'merge'
@checker.save!
end
it "emits the received event" do
@checker.receive([@event])
@checker.check
expect(@checker.events.last.payload['somekey']).to eq('somevalue')
expect(@checker.events.last.payload['someotherkey']).to eq({ 'somekey' => 'value' })
end
end
end
end
end
@ -430,5 +444,31 @@ describe Agents::PostAgent do
@checker.options['emit_events'] = true
expect(@checker).to be_valid
end
it "requires output_mode to be 'clean' or 'merge', if present" do
@checker.options['output_mode'] = 'what?'
expect(@checker).not_to be_valid
@checker.options.delete('output_mode')
expect(@checker).to be_valid
@checker.options['output_mode'] = 'clean'
expect(@checker).to be_valid
@checker.options['output_mode'] = 'merge'
expect(@checker).to be_valid
@checker.options['output_mode'] = :clean
expect(@checker).to be_valid
@checker.options['output_mode'] = :merge
expect(@checker).to be_valid
@checker.options['output_mode'] = '{{somekey}}'
expect(@checker).to be_valid
@checker.options['output_mode'] = "{% if key == 'foo' %}merge{% else %}clean{% endif %}"
expect(@checker).to be_valid
end
end
end