Refresh the browser each time, the global header is added in duplicate.

Fixes #1820

Author: bnasslahsen

Diff for: springdoc-openapi-common/src/main/java/org/springdoc/api/AbstractOpenApiResource.java

@@ -48,6 +48,7 @@
 
 import com.fasterxml.jackson.annotation.JsonView;
 import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
 import com.fasterxml.jackson.dataformat.yaml.YAMLGenerator.Feature;
@@ -65,6 +66,7 @@
 import io.swagger.v3.oas.models.media.StringSchema;
 import io.swagger.v3.oas.models.parameters.Parameter;
 import io.swagger.v3.oas.models.responses.ApiResponses;
+import io.swagger.v3.oas.models.servers.Server;
 import org.apache.commons.lang3.ArrayUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
@@ -337,10 +339,26 @@ protected synchronized OpenAPI getOpenApi(Locale locale) {
 			);
 			if (!CollectionUtils.isEmpty(openAPI.getServers()))
 				openAPIService.setServersPresent(true);
+			openAPIService.updateServers(openAPI);
 
 			if (springDocConfigProperties.isRemoveBrokenReferenceDefinitions())
 				this.removeBrokenReferenceDefinitions(openAPI);
 
+			// run the optional customisers
+			List<Server> servers = openAPI.getServers();
+			List<Server> serversCopy = null;
+			try {
+				serversCopy = springDocProviders.jsonMapper()
+						.readValue(springDocProviders.jsonMapper().writeValueAsString(servers), new TypeReference<List<Server>>() {});
+			}
+			catch (JsonProcessingException e) {
+				LOGGER.warn("Json Processing Exception occurred: {}", e.getMessage());
+			}
+
+			openApiLocaleCustomizers.values().forEach(openApiLocaleCustomizer -> openApiLocaleCustomizer.customise(openAPI, finalLocale));
+			openApiCustomisers.ifPresent(apiCustomisers -> apiCustomisers.forEach(openApiCustomiser -> openApiCustomiser.customise(openAPI)));
+			if (!CollectionUtils.isEmpty(openAPI.getServers()) && !openAPI.getServers().equals(serversCopy))
+				openAPIService.setServersPresent(true);
 
 			openAPIService.setCachedOpenAPI(openAPI, finalLocale);
 
@@ -350,10 +368,9 @@ protected synchronized OpenAPI getOpenApi(Locale locale) {
 		else {
 			LOGGER.debug("Fetching openApi document from cache");
 			openAPI = openAPIService.getCachedOpenAPI(finalLocale);
+			openAPIService.updateServers(openAPI);
 		}
-		openAPIService.updateServers(openAPI);
-		openApiLocaleCustomizers.values().forEach(openApiLocaleCustomizer -> openApiLocaleCustomizer.customise(openAPI, finalLocale));
-		openApiCustomisers.ifPresent(apiCustomizers -> apiCustomizers.forEach(openApiCustomizer -> openApiCustomizer.customise(openAPI)));
+
 		return openAPI;
 	}
 

Diff for: springdoc-openapi-common/src/test/java/org/springdoc/api/AbstractOpenApiResourceTest.java

@@ -29,6 +29,7 @@
 import java.util.Map;
 import java.util.Optional;
 
+import io.swagger.v3.core.util.Json;
 import io.swagger.v3.oas.annotations.enums.ParameterIn;
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.Operation;
@@ -123,6 +124,7 @@ public void setUp() {
 		when(openAPIService.build(any())).thenReturn(openAPI);
 
 		when(openAPIBuilderObjectFactory.getObject()).thenReturn(openAPIService);
+		when(springDocProviders.jsonMapper()).thenReturn(Json.mapper());
 	}
 
 	@Test

Diff for: springdoc-openapi-webmvc-core/src/test/resources/results/3.0.1/app138.json

@@ -1 +1 @@
-{"openapi":"3.0.1","info":{"title":"OpenAPI definition","version":"v0"},"servers":[{"description":"Generated server url","url":"http://localhost"}],"paths":{"/testA":{"get":{"operationId":"testA","parameters":[{"in":"query","name":"hello","required":true,"schema":{"type":"string"}}],"responses":{"200":{"description":"OK"}},"tags":["hello-controller"]}},"/testB":{"get":{"operationId":"testB","parameters":[{"in":"query","name":"hello","required":true,"schema":{"type":"string"}}],"responses":{"200":{"description":"OK"}},"tags":["hello-controller"]}}},"components":{},"x-my-vendor-extensions":{"property1":"value1","property2":null}}
+{"openapi":"3.0.1","info":{"title":"OpenAPI definition","version":"v0"},"servers":[{"url":"http://localhost","description":"Generated server url"}],"paths":{"/testA":{"get":{"operationId":"testA","parameters":[{"in":"query","name":"hello","required":true,"schema":{"type":"string"}}],"responses":{"200":{"description":"OK"}},"tags":["hello-controller"]}},"/testB":{"get":{"operationId":"testB","parameters":[{"in":"query","name":"hello","required":true,"schema":{"type":"string"}}],"responses":{"200":{"description":"OK"}},"tags":["hello-controller"]}}},"components":{},"x-my-vendor-extensions":{"property1":"value1","property2":null}}