Updated construct_api logic to parse host value

lib/fluent/plugin/out_splunk_hec.rb

@@ -31,11 +31,14 @@ class SplunkHecOutput < SplunkOutput
     config_param :protocol, :enum, list: %i[http https], default: :https
 
     desc 'The hostname/IP to HEC, or HEC load balancer.'
-    config_param :hec_host, :string
+    config_param :hec_host, :string, default: ''
 
     desc 'The port number to HEC, or HEC load balancer.'
     config_param :hec_port, :integer, default: 8088
 
+    desc 'Full url to connect tosplunk. Example: https://mydomain.com:8088/apps/splunk'
+    config_param :full_url, :string, default: ''
+
     desc 'The HEC token.'
     config_param :hec_token, :string
 
@@ -132,7 +135,7 @@ def initialize
 
     def configure(conf)
       super
-
+      raise Fluent::ConfigError, 'One of `hec_host` or `full_url` is required.' if @hec_host.empty? && @full_url.empty?
       check_metric_configs
       pick_custom_format_method
     end
@@ -279,9 +282,17 @@ def format_metric(tag, time, record)
     end
 
     def construct_api
-      URI("#{@protocol}://#{@hec_host}:#{@hec_port}/services/collector")
+      if @full_url.empty?
+        URI("#{@protocol}://#{@hec_host}:#{@hec_port}/services/collector")
+      else
+        URI("#{@full_url.delete_suffix("/")}/services/collector")
+      end
     rescue StandardError
-      raise Fluent::ConfigError, "hec_host (#{@hec_host}) and/or hec_port (#{@hec_port}) are invalid."
+      if @full_url.empty?
+        raise Fluent::ConfigError, "hec_host (#{@hec_host}) and/or hec_port (#{@hec_port}) are invalid."
+      else
+        raise Fluent::ConfigError, "full_url (#{@full_url}) is invalid."
+      end
     end
 
     def new_connection

test/fluent/plugin/out_splunk_hec_test.rb

@@ -64,7 +64,7 @@
 
   describe 'hec_host validation' do
     describe 'invalid host' do
-      it 'should require hec_host' do
+      it 'should require hec_host or full_url' do
         expect { create_hec_output_driver }.must_raise Fluent::ConfigError
       end
 
@@ -78,6 +78,17 @@
     end
   end
 
+  describe 'full_url validation' do
+    describe 'invalid full_url' do
+      it { expect { create_hec_output_driver(full_url: '%bad-host%.com') }.must_raise Fluent::ConfigError }
+    end
+    describe 'good full_url' do
+      it { 
+        expect(create_hec_output_driver('full_url https://splunk.com').instance.full_url).must_equal 'https://splunk.com'
+      }
+    end
+  end
+
   it 'should send request to Splunk' do
     req = verify_sent_events do |batch|
       expect(batch.size).must_equal 2