OpenAPI enhancement

extensions/smallrye-openapi-common/deployment/src/main/java/io/quarkus/smallrye/openapi/common/deployment/SmallRyeOpenApiConfig.java

@@ -71,6 +71,13 @@ public final class SmallRyeOpenApiConfig {
     @ConfigItem(defaultValue = "true")
     public boolean autoAddTags;
 
+    /**
+     * Setting it to `true` will automatically add a default server to the schema if none is provided,
+     * using the current running server host and port.
+     */
+    @ConfigItem
+    public Optional<Boolean> autoAddServer;
+
     /**
      * This will automatically add security based on the security extension included (if any).
      */

extensions/smallrye-openapi/deployment/src/main/java/io/quarkus/smallrye/openapi/deployment/SmallRyeOpenApiProcessor.java

@@ -81,10 +81,12 @@
 import io.quarkus.security.Authenticated;
 import io.quarkus.smallrye.openapi.common.deployment.SmallRyeOpenApiConfig;
 import io.quarkus.smallrye.openapi.deployment.filter.AutoRolesAllowedFilter;
+import io.quarkus.smallrye.openapi.deployment.filter.AutoServerFilter;
 import io.quarkus.smallrye.openapi.deployment.filter.AutoTagFilter;
 import io.quarkus.smallrye.openapi.deployment.filter.SecurityConfigFilter;
 import io.quarkus.smallrye.openapi.deployment.spi.AddToOpenAPIDefinitionBuildItem;
 import io.quarkus.smallrye.openapi.deployment.spi.IgnoreStaticDocumentBuildItem;
+import io.quarkus.smallrye.openapi.deployment.spi.OpenApiDocumentBuildItem;
 import io.quarkus.smallrye.openapi.runtime.OpenApiConstants;
 import io.quarkus.smallrye.openapi.runtime.OpenApiDocumentService;
 import io.quarkus.smallrye.openapi.runtime.OpenApiRecorder;
@@ -289,7 +291,7 @@ OpenApiFilteredIndexViewBuildItem smallryeOpenApiIndex(CombinedIndexBuildItem co
     }
 
     @BuildStep
-    void addSecurityFilter(BuildProducer<AddToOpenAPIDefinitionBuildItem> addToOpenAPIDefinitionProducer,
+    void addAutoFilters(BuildProducer<AddToOpenAPIDefinitionBuildItem> addToOpenAPIDefinitionProducer,
             OpenApiFilteredIndexViewBuildItem apiFilteredIndexViewBuildItem,
             SmallRyeOpenApiConfig config) {
 
@@ -342,6 +344,11 @@ void addSecurityFilter(BuildProducer<AddToOpenAPIDefinitionBuildItem> addToOpenA
             addToOpenAPIDefinitionProducer.produce(new AddToOpenAPIDefinitionBuildItem(autoTagFilter));
         }
 
+        // Add Auto Server based on the current server details
+        OASFilter autoServerFilter = getAutoServerFilter(config, false);
+        if (autoServerFilter != null) {
+            addToOpenAPIDefinitionProducer.produce(new AddToOpenAPIDefinitionBuildItem(autoServerFilter));
+        }
     }
 
     private OASFilter getAutoSecurityFilter(List<SecurityInformationBuildItem> securityInformationBuildItems,
@@ -439,6 +446,27 @@ private OASFilter getAutoTagFilter(OpenApiFilteredIndexViewBuildItem apiFiltered
         return null;
     }
 
+    private OASFilter getAutoServerFilter(SmallRyeOpenApiConfig config, boolean defaultFlag) {
+        if (config.autoAddServer.orElse(defaultFlag)) {
+            Config c = ConfigProvider.getConfig();
+
+            String scheme = "http";
+            String host = c.getOptionalValue("quarkus.http.host", String.class).orElse("0.0.0.0");
+            int port;
+
+            String insecure = c.getOptionalValue("quarkus.http.insecure-requests", String.class).orElse("enabled");
+            if (insecure.equalsIgnoreCase("enabled")) {
+                port = c.getOptionalValue("quarkus.http.port", Integer.class).orElse(8080);
+            } else {
+                scheme = "https";
+                port = c.getOptionalValue("quarkus.http.ssl-port", Integer.class).orElse(8443);
+            }
+
+            return new AutoServerFilter(scheme, host, port);
+        }
+        return null;
+    }
+
     private Map<String, List<String>> getRolesAllowedMethodReferences(
             OpenApiFilteredIndexViewBuildItem apiFilteredIndexViewBuildItem) {
         List<AnnotationInstance> rolesAllowedAnnotations = new ArrayList<>();
@@ -650,6 +678,7 @@ private void registerReflectionForApiResponseSchemaSerialization(BuildProducer<R
     public void build(BuildProducer<FeatureBuildItem> feature,
             BuildProducer<GeneratedResourceBuildItem> resourceBuildItemBuildProducer,
             BuildProducer<NativeImageResourceBuildItem> nativeImageResources,
+            BuildProducer<OpenApiDocumentBuildItem> openApiDocumentProducer,
             OpenApiFilteredIndexViewBuildItem openApiFilteredIndexViewBuildItem,
             Capabilities capabilities,
             List<AddToOpenAPIDefinitionBuildItem> openAPIBuildItems,
@@ -686,11 +715,9 @@ public void build(BuildProducer<FeatureBuildItem> feature,
             nativeImageResources.produce(new NativeImageResourceBuildItem(name));
         }
 
-        // Store the document if needed
-        boolean shouldStore = openApiConfig.storeSchemaDirectory.isPresent();
-        if (shouldStore) {
-            storeDocument(out, openApiConfig, staticModel, annotationModel, openAPIBuildItems);
-        }
+        OpenApiDocument finalStoredOpenApiDocument = storeDocument(out, openApiConfig, staticModel, annotationModel,
+                openAPIBuildItems);
+        openApiDocumentProducer.produce(new OpenApiDocumentBuildItem(finalStoredOpenApiDocument));
     }
 
     @BuildStep
@@ -964,7 +991,7 @@ private OpenApiDocument loadDocument(OpenAPI staticModel, OpenAPI annotationMode
         return document;
     }
 
-    private void storeDocument(OutputTargetBuildItem out,
+    private OpenApiDocument storeDocument(OutputTargetBuildItem out,
             SmallRyeOpenApiConfig smallRyeOpenApiConfig,
             OpenAPI staticModel,
             OpenAPI annotationModel,
@@ -976,14 +1003,24 @@ private void storeDocument(OutputTargetBuildItem out,
         OpenApiDocument document = prepareOpenApiDocument(staticModel, annotationModel, openAPIBuildItems);
 
         document.filter(filter(openApiConfig)); // This usually happens at runtime, so when storing we want to filter here too.
+        // By default also add the auto generated server
+        OASFilter autoServerFilter = getAutoServerFilter(smallRyeOpenApiConfig, true);
+        if (autoServerFilter != null) {
+            document.filter(autoServerFilter);
+        }
         document.initialize();
 
-        for (Format format : Format.values()) {
-            String name = OpenApiConstants.BASE_NAME + format;
-            byte[] schemaDocument = OpenApiSerializer.serialize(document.get(), format).getBytes(StandardCharsets.UTF_8);
-            storeGeneratedSchema(smallRyeOpenApiConfig, out, schemaDocument, format);
+        // Store the document if needed
+        boolean shouldStore = smallRyeOpenApiConfig.storeSchemaDirectory.isPresent();
+        if (shouldStore) {
+            for (Format format : Format.values()) {
+                String name = OpenApiConstants.BASE_NAME + format;
+                byte[] schemaDocument = OpenApiSerializer.serialize(document.get(), format).getBytes(StandardCharsets.UTF_8);
+                storeGeneratedSchema(smallRyeOpenApiConfig, out, schemaDocument, format);
+            }
         }
 
+        return document;
     }
 
     private OpenApiDocument prepareOpenApiDocument(OpenAPI staticModel,

extensions/smallrye-openapi/deployment/src/main/java/io/quarkus/smallrye/openapi/deployment/filter/AutoServerFilter.java

@@ -0,0 +1,66 @@
+package io.quarkus.smallrye.openapi.deployment.filter;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.microprofile.openapi.OASFilter;
+import org.eclipse.microprofile.openapi.models.OpenAPI;
+import org.eclipse.microprofile.openapi.models.servers.Server;
+
+import io.smallrye.openapi.api.models.servers.ServerImpl;
+
+/**
+ * Automatically add default server if none is provided
+ */
+public class AutoServerFilter implements OASFilter {
+
+    private static final String DESCRIPTION = "Auto generated value";
+    private static final String HTTP = "http";
+    private static final String ZEROS = "0.0.0.0";
+    private static final String LOCALHOST = "localhost";
+    private static final String URL_PATTERN = "%s://%s:%d";
+
+    private final String defaultScheme;
+    private final String defaultHost;
+    private final int defaultPort;
+
+    public AutoServerFilter(String defaultScheme, String defaultHost, int defaultPort) {
+        if (defaultScheme == null) {
+            defaultScheme = HTTP;
+        }
+        if (defaultHost == null) {
+            defaultHost = ZEROS;
+        }
+        this.defaultScheme = defaultScheme;
+        this.defaultHost = defaultHost;
+        this.defaultPort = defaultPort;
+    }
+
+    @Override
+    public void filterOpenAPI(OpenAPI openAPI) {
+
+        List<Server> servers = openAPI.getServers();
+        if (servers == null || servers.isEmpty()) {
+            servers = new ArrayList<>();
+
+            // In case of 0.0.0.0, also add localhost
+            if (this.defaultHost.equals(ZEROS)) {
+                ServerImpl localhost = new ServerImpl();
+                localhost.setUrl(getUrl(this.defaultScheme, LOCALHOST, this.defaultPort));
+                localhost.setDescription(DESCRIPTION);
+                servers.add(localhost);
+            }
+
+            ServerImpl serverImpl = new ServerImpl();
+            serverImpl.setUrl(getUrl(this.defaultScheme, this.defaultHost, this.defaultPort));
+            serverImpl.setDescription(DESCRIPTION);
+            servers.add(serverImpl);
+
+            openAPI.setServers(servers);
+        }
+    }
+
+    private String getUrl(String scheme, String host, int port) {
+        return String.format(URL_PATTERN, scheme, host, port);
+    }
+}

extensions/smallrye-openapi/spi/src/main/java/io/quarkus/smallrye/openapi/deployment/spi/OpenApiDocumentBuildItem.java

@@ -0,0 +1,20 @@
+package io.quarkus.smallrye.openapi.deployment.spi;
+
+import io.quarkus.builder.item.SimpleBuildItem;
+import io.smallrye.openapi.api.OpenApiDocument;
+
+/**
+ * The final OpenAPI Document as generated by the Extension.
+ */
+public final class OpenApiDocumentBuildItem extends SimpleBuildItem {
+
+    private final OpenApiDocument openApiDocument;
+
+    public OpenApiDocumentBuildItem(OpenApiDocument openApiDocument) {
+        this.openApiDocument = openApiDocument;
+    }
+
+    public OpenApiDocument getOpenApiDocument() {
+        return openApiDocument;
+    }
+}