Do not err if headers is a valid headers hash

app/models/agents/website_agent.rb

@@ -136,7 +136,7 @@ class WebsiteAgent < Agent
 
           * `status`: HTTP status as integer. (Almost always 200)  When parsing `data_from_event`, this is set to the value of the `status` key in the incoming Event, if it is a number or a string convertible to an integer.
 
-          * `headers`: Response headers; for example, `{{ _response_.headers.Content-Type }}` expands to the value of the Content-Type header.  Keys are insensitive to cases and -/_.  When parsing `data_from_event`, this is constructed from the value of the `headers` key in the incoming Event.
+          * `headers`: Response headers; for example, `{{ _response_.headers.Content-Type }}` expands to the value of the Content-Type header.  Keys are insensitive to cases and -/_.  When parsing `data_from_event`, this is constructed from the value of the `headers` key in the incoming Event, if it is a hash.
 
           * `url`: The final URL of the fetched page, following redirects.  When parsing `data_from_event`, this is set to the value of the `url` key in the incoming Event.  Using this in the `template` option, you can resolve relative URLs extracted from a document like `{{ link | to_uri: _request_.url }}` and `{{ content | rebase_hrefs: _request_.url }}`.
 
@@ -684,12 +684,9 @@ def url
 
     class ResponseFromEventDrop < LiquidDroppable::Drop
       def headers
-        case headers = @object.payload[:headers]
-        when Hash
-          HeaderDrop.new(Faraday::Utils::Headers.from(headers))
-        else
-          HeaderDrop.new({})
-        end
+        headers = Faraday::Utils::Headers.from(@object.payload[:headers]) rescue {}
+
+        HeaderDrop.new(headers)
       end
 
       # Integer value of HTTP status

spec/models/agents/website_agent_spec.rb

@@ -1219,6 +1219,24 @@
             expect(@checker.events.last.payload).to eq(@event.payload.merge('value' => 'world', 'url' => 'http://example.com/world', 'type' => 'application/json', 'status' => 200))
           end
 
+          it "should convert headers and status in the event data properly" do
+            @event.payload[:status] = '201'
+            @event.payload[:headers] = [['Content-Type', 'application/rss+xml']]
+            expect {
+              @checker.receive([@event])
+            }.to change { Event.count }.by(1)
+            expect(@checker.events.last.payload).to eq({ 'value' => 'world', 'url' => 'http://example.com/world', 'type' => 'application/rss+xml', 'status' => 201 })
+          end
+
+          it "should ignore inconvertible headers and status in the event data" do
+            @event.payload[:status] = 'ok'
+            @event.payload[:headers] = ['Content-Type', 'Content-Length']
+            expect {
+              @checker.receive([@event])
+            }.to change { Event.count }.by(1)
+            expect(@checker.events.last.payload).to eq({ 'value' => 'world', 'url' => 'http://example.com/world', 'type' => '', 'status' => nil })
+          end
+
           it "should output an error when nothing can be found at the path" do
             @checker.options = @checker.options.merge(
               'data_from_event' => '{{ some_object.mistake }}'