CRED-2151: Add PAT auth support to Ruby API client

Author: tausman

.generator/src/generator/templates/api_client.j2

@@ -366,9 +366,18 @@ module {{ module_name }}
     # @param [Hash] query_params Query parameters
     # @param [String] auth_names Authentication scheme name
     def update_params_for_auth!(header_params, query_params, auth_names)
-      Array(auth_names).each do |auth_name|
+      auth_names = Array(auth_names)
+
+      # When a bearer token (PAT) is configured, use Bearer auth exclusively
+      # instead of API key + App key.
+      if @config.access_token
+        auth_names = [:bearerAuth]
+      end
+
+      auth_names.each do |auth_name|
         auth_setting = @config.auth_settings[auth_name]
         next unless auth_setting
+        next if auth_setting[:value].nil? || auth_setting[:value].to_s.empty?
         case auth_setting[:in]
         when 'header' then header_params[auth_setting[:key]] = auth_setting[:value]
         when 'query'  then query_params[auth_setting[:key]] = auth_setting[:value]

.generator/src/generator/templates/configuration.j2

@@ -193,6 +193,9 @@ module {{ module_name }}
       {%- for name, schema in openapi.components.securitySchemes.items() if "x-env-name" in schema and schema.in == "header" and schema.type == "apiKey" %}
       @api_key['{{ name }}'] = ENV['{{ schema["x-env-name"] }}'] if ENV.key? '{{ schema["x-env-name"] }}'
       {%- endfor %}
+      {%- for name, schema in openapi.components.securitySchemes.items() if "x-env-name" in schema and schema.type == "http" and schema.scheme == "bearer" %}
+      @access_token = ENV['{{ schema["x-env-name"] }}'] if ENV.key? '{{ schema["x-env-name"] }}'
+      {%- endfor %}
 
       yield(self) if block_given?
     end
@@ -284,18 +287,14 @@ module {{ module_name }}
             key: 'Authorization',
             value: basic_auth_token
           },
-{# {%- elif schema.type == "http" and schema.scheme == "bearer" %}
+{%- elif schema.type == "http" and schema.scheme == "bearer" %}
         {{name}}:
           {
-            type: 'bearer',
+            type: 'http',
             in: 'header',
-            {% if schema.bearerFormat %}
-            format: '{{ schema.bearerFormat }}',
-            {% endif %}
             key: 'Authorization',
-            value: "Bearer #{access_token}"
+            value: access_token ? "Bearer #{access_token}" : nil
           },
-#}
 {%- elif schema.type == "oauth2" %}
         {{name}}:
           {

lib/datadog_api_client/api_client.rb

@@ -154,7 +154,7 @@ def calculate_retry_interval(response, backoff_base, backoff_multiplier, attempt
     #Redact api and app key in the request header
     def sanitize_request_header(request_header)
       sanitized_headers= request_header.dup
-      keys_to_redact = ["DD-API-KEY", "DD-APPLICATION-KEY"]
+      keys_to_redact = ["DD-API-KEY", "DD-APPLICATION-KEY", "Authorization"]
       keys_to_redact.each do |key_to_redact|
         if sanitized_headers.key?(key_to_redact)
           sanitized_headers[key_to_redact] = "REDACTED"
@@ -377,9 +377,18 @@ def build_request_url(path, opts = {})
     # @param [Hash] query_params Query parameters
     # @param [String] auth_names Authentication scheme name
     def update_params_for_auth!(header_params, query_params, auth_names)
-      Array(auth_names).each do |auth_name|
+      auth_names = Array(auth_names)
+
+      # When a bearer token (PAT) is configured, use Bearer auth exclusively
+      # instead of API key + App key.
+      if @config.access_token
+        auth_names = [:bearerAuth]
+      end
+
+      auth_names.each do |auth_name|
         auth_setting = @config.auth_settings[auth_name]
         next unless auth_setting
+        next if auth_setting[:value].nil? || auth_setting[:value].to_s.empty?
         case auth_setting[:in]
         when 'header' then header_params[auth_setting[:key]] = auth_setting[:value]
         when 'query'  then query_params[auth_setting[:key]] = auth_setting[:value]

lib/datadog_api_client/configuration.rb

@@ -408,6 +408,7 @@ def initialize
       @server_variables[:site] = ENV['DD_SITE'] if ENV.key? 'DD_SITE'
       @api_key['apiKeyAuth'] = ENV['DD_API_KEY'] if ENV.key? 'DD_API_KEY'
       @api_key['appKeyAuth'] = ENV['DD_APP_KEY'] if ENV.key? 'DD_APP_KEY'
+      @access_token = ENV['DD_BEARER_TOKEN'] if ENV.key? 'DD_BEARER_TOKEN'
 
       yield(self) if block_given?
     end
@@ -503,6 +504,13 @@ def auth_settings
             key: 'DD-APPLICATION-KEY',
             value: api_key_with_prefix('appKeyAuth')
           },
+        bearerAuth:
+          {
+            type: 'http',
+            in: 'header',
+            key: 'Authorization',
+            value: access_token ? "Bearer #{access_token}" : nil
+          },
       }
     end
 

spec/api_client_spec.rb

@@ -206,4 +206,69 @@
       expect(api_client.sanitize_filename('.\sun.gif')).to eq('sun.gif')
     end
   end
+
+  describe '#update_params_for_auth!' do
+    let(:config) { DatadogAPIClient::Configuration.new }
+    let(:api_client) { DatadogAPIClient::APIClient.new(config) }
+
+    context 'when bearer token (PAT) is configured' do
+      before do
+        config.api_key = 'test_api_key'
+        config.application_key = 'test_app_key'
+        config.access_token = 'ddpat_test_pat'
+      end
+
+      it 'sends only Bearer Authorization header, no API key or app key' do
+        header_params = {}
+        query_params = {}
+        api_client.update_params_for_auth!(header_params, query_params, [:apiKeyAuth, :appKeyAuth])
+        expect(header_params['Authorization']).to eq('Bearer ddpat_test_pat')
+        expect(header_params).not_to have_key('DD-API-KEY')
+        expect(header_params).not_to have_key('DD-APPLICATION-KEY')
+      end
+
+      it 'sends only Bearer even when bearerAuth is already in auth_names' do
+        header_params = {}
+        query_params = {}
+        api_client.update_params_for_auth!(header_params, query_params, [:apiKeyAuth, :appKeyAuth, :bearerAuth])
+        expect(header_params['Authorization']).to eq('Bearer ddpat_test_pat')
+        expect(header_params).not_to have_key('DD-API-KEY')
+        expect(header_params).not_to have_key('DD-APPLICATION-KEY')
+      end
+    end
+
+    context 'when bearer token is not configured' do
+      before do
+        config.api_key = 'test_api_key'
+        config.application_key = 'test_app_key'
+      end
+
+      it 'uses API key and app key, no Bearer header' do
+        header_params = {}
+        query_params = {}
+        api_client.update_params_for_auth!(header_params, query_params, [:apiKeyAuth, :appKeyAuth])
+        expect(header_params['DD-API-KEY']).to eq('test_api_key')
+        expect(header_params['DD-APPLICATION-KEY']).to eq('test_app_key')
+        expect(header_params).not_to have_key('Authorization')
+      end
+    end
+  end
+
+  describe '#sanitize_request_header' do
+    let(:api_client) { DatadogAPIClient::APIClient.new }
+
+    it 'redacts sensitive headers including Authorization' do
+      headers = {
+        'DD-API-KEY' => 'secret_api_key',
+        'DD-APPLICATION-KEY' => 'secret_app_key',
+        'Authorization' => 'Bearer ddapp_secret_pat',
+        'Content-Type' => 'application/json'
+      }
+      sanitized = api_client.sanitize_request_header(headers)
+      expect(sanitized['DD-API-KEY']).to eq('REDACTED')
+      expect(sanitized['DD-APPLICATION-KEY']).to eq('REDACTED')
+      expect(sanitized['Authorization']).to eq('REDACTED')
+      expect(sanitized['Content-Type']).to eq('application/json')
+    end
+  end
 end

spec/configuration_spec.rb

@@ -58,5 +58,45 @@
     end
   end
 
+  describe '#access_token (bearer auth)' do
+    let(:config) { DatadogAPIClient::Configuration.new }
+
+    it 'defaults to nil' do
+      expect(config.access_token).to be_nil
+    end
+
+    it 'can be set directly' do
+      config.access_token = 'ddpat_test_token_123'
+      expect(config.access_token).to eq('ddpat_test_token_123')
+    end
+
+    it 'loads from DD_BEARER_TOKEN environment variable' do
+      allow(ENV).to receive(:key?).and_call_original
+      allow(ENV).to receive(:key?).with('DD_BEARER_TOKEN').and_return(true)
+      allow(ENV).to receive(:[]).and_call_original
+      allow(ENV).to receive(:[]).with('DD_BEARER_TOKEN').and_return('ddpat_env_token')
+      new_config = DatadogAPIClient::Configuration.new
+      expect(new_config.access_token).to eq('ddpat_env_token')
+    end
+  end
+
+  describe '#auth_settings' do
+    let(:config) { DatadogAPIClient::Configuration.new }
+
+    it 'includes bearerAuth with nil value when token not set' do
+      expect(config.auth_settings[:bearerAuth]).not_to be_nil
+      expect(config.auth_settings[:bearerAuth][:value]).to be_nil
+    end
+
+    it 'includes bearerAuth with Bearer token when access_token is set' do
+      config.access_token = 'ddpat_my_token'
+      auth = config.auth_settings[:bearerAuth]
+      expect(auth[:type]).to eq('http')
+      expect(auth[:in]).to eq('header')
+      expect(auth[:key]).to eq('Authorization')
+      expect(auth[:value]).to eq('Bearer ddpat_my_token')
+    end
+  end
+
 
 end