Merge pull request #676 from andrenpaes/servlet-request-attributes

Exposes Servlet Request attributes

Author: jknack

jooby-servlet/src/main/java/org/jooby/servlet/ServletServletRequest.java

@@ -23,12 +23,9 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URLDecoder;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.Enumeration;
-import java.util.List;
-import java.util.Optional;
+import java.util.*;
 import java.util.concurrent.Executor;
+import java.util.function.Function;
 import java.util.stream.Collectors;
 
 import javax.servlet.ServletException;
@@ -119,6 +116,16 @@ public List<String> params(final String name) throws Exception {
     return Arrays.asList(values);
   }
 
+  @Override
+  public Map<String, Object> attributes() {
+    final Enumeration<String> attributeNames = req.getAttributeNames();
+    if (!attributeNames.hasMoreElements()) {
+      return Collections.emptyMap();
+    }
+    return Collections.list(attributeNames).stream()
+        .collect(Collectors.toMap(Function.identity(), name -> req.getAttribute(name)));
+  }
+
   @Override
   public List<String> headers(final String name) {
     return toList(req.getHeaders(name));

jooby-servlet/src/test/java/org/jooby/servlet/ServletServletRequestTest.java

@@ -4,10 +4,14 @@
 import static org.junit.Assert.assertEquals;
 
 import java.io.IOException;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.UUID;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 
+import com.google.common.collect.ImmutableMap;
 import org.jooby.MediaType;
 import org.jooby.test.MockUnit;
 import org.junit.Test;
@@ -148,6 +152,45 @@ public void noparams() throws IOException, Exception {
 
   }
 
+  @Test
+  public void attributes() throws Exception {
+    String tmpdir = System.getProperty("java.io.tmpdir");
+    final UUID serverAttribute = UUID.randomUUID();
+    new MockUnit(HttpServletRequest.class)
+        .expect(unit -> {
+          HttpServletRequest req = unit.get(HttpServletRequest.class);
+          expect(req.getContentType()).andReturn("text/html");
+          expect(req.getPathInfo()).andReturn("/");
+          expect(req.getAttributeNames()).andReturn(
+              Collections.enumeration(Collections.singletonList("server.attribute")));
+          expect(req.getAttribute("server.attribute")).andReturn(serverAttribute);
+        })
+        .run(unit -> {
+          assertEquals(ImmutableMap.of("server.attribute", serverAttribute),
+              new ServletServletRequest(unit.get(HttpServletRequest.class), tmpdir)
+                  .attributes());
+        });
+
+  }
+
+  @Test
+  public void emptyAttributes() throws Exception {
+    String tmpdir = System.getProperty("java.io.tmpdir");
+    new MockUnit(HttpServletRequest.class)
+        .expect(unit -> {
+          HttpServletRequest req = unit.get(HttpServletRequest.class);
+          expect(req.getContentType()).andReturn("text/html");
+          expect(req.getPathInfo()).andReturn("/");
+          expect(req.getAttributeNames()).andReturn(Collections.emptyEnumeration());
+        })
+        .run(unit -> {
+          assertEquals(Collections.emptyMap(),
+              new ServletServletRequest(unit.get(HttpServletRequest.class), tmpdir)
+                  .attributes());
+        });
+
+  }
+
   @Test(expected = IOException.class)
   public void filesFailure() throws IOException, Exception {
     String tmpdir = System.getProperty("java.io.tmpdir");

jooby/src/main/java/org/jooby/internal/HttpHandlerImpl.java

@@ -227,6 +227,8 @@ public void handle(final NativeRequest request, final NativeResponse response) t
       requestPath = rpath.apply(requestPath);
     }
 
+    // put request attributes first to make sure we don't override defaults
+    locals.putAll(request.attributes());
     // default locals
     locals.put(CONTEXT_PATH, contextPath);
     locals.put(PATH, requestPath);

jooby/src/main/java/org/jooby/spi/NativeRequest.java

@@ -20,6 +20,7 @@
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -71,6 +72,13 @@ public interface NativeRequest {
    */
   List<String> params(String name) throws Exception;
 
+  /**
+   * @return Map containing all request attributes
+   */
+  default Map<String, Object> attributes() {
+    return Collections.emptyMap();
+  }
+
   /**
    * Get all the headers for the provided name or a empty list.
    *