Added feature to serve from the same swagger-ui both, REST APIs that are deployed within the same application as the swagger-ui and external REST APIs. Fixes #309.

Author: bnasslahsen

Diff for: springdoc-openapi-common/src/main/java/org/springdoc/core/SwaggerUiConfigProperties.java

@@ -117,6 +117,11 @@ public static void addGroup(String group) {
         swaggerUrls.add(swaggerUrl);
     }
 
+    public static void addGroup(String group, String url) {
+        SwaggerUrl swaggerUrl = new SwaggerUrl(group, url);
+        swaggerUrls.add(swaggerUrl);
+    }
+
     public static List<SwaggerUrl> getSwaggerUrls() {
         return swaggerUrls;
     }
@@ -126,14 +131,18 @@ public static void setSwaggerUrls(List<SwaggerUrl> swaggerUrls) {
     }
 
     public static void addUrl(String url) {
-        swaggerUrls.forEach(elt -> elt.setUrl(url + DEFAULT_PATH_SEPARATOR + elt.getName()));
+        swaggerUrls.forEach(elt ->
+        {
+            if (StringUtils.isEmpty(elt.url))
+                elt.setUrl(url + DEFAULT_PATH_SEPARATOR + elt.getName());
+        });
     }
 
     public Map<String, Object> getConfigParameters() {
         final Map<String, Object> params = new TreeMap<>();
         put("layout", layout, params);
         put(CONFIG_URL_PROPERTY, configUrl, params);
-        put( "validatorUrl", validatorUrl, params);
+        put("validatorUrl", validatorUrl, params);
         put("filter", filter, params);
         put("deepLinking", this.deepLinking, params);
         put("displayOperationId", displayOperationId, params);
@@ -344,6 +353,11 @@ static class SwaggerUrl {
         private String url;
         private String name;
 
+        public SwaggerUrl(String group, String url) {
+            this.url = url;
+            this.name = group;
+        }
+
         public SwaggerUrl(String group) {
             this.name = group;
         }