Issue #261: handle 204 no content correctly

src/main/java/org/kohsuke/github/Requester.java

@@ -512,6 +512,10 @@ class Requester {
             if (responseCode == 304) {
                 return null;    // special case handling for 304 unmodified, as the content will be ""
             }
+            if (responseCode == 204 && type.isArray()) {
+                // no content
+                return type.cast(Array.newInstance(type.getComponentType(),0));
+            }
 
             r = new InputStreamReader(wrapStream(uc.getInputStream()), "UTF-8");
             String data = IOUtils.toString(r);

src/test/java/Foo.java

@@ -1,4 +1,5 @@
 import org.kohsuke.github.GHRepository;
+import org.kohsuke.github.GHRepository.Contributor;
 import org.kohsuke.github.GHUser;
 import org.kohsuke.github.GitHub;
 
@@ -9,11 +10,10 @@ import java.util.Collection;
  */
 public class Foo {
     public static void main(String[] args) throws Exception {
-        Collection<GHRepository> lst = GitHub.connect().getUser("kohsuke").getRepositories().values();
-        for (GHRepository r : lst) {
-            System.out.println(r.getName());
+        GitHub gh = GitHub.connect();
+        for (Contributor c : gh.getRepository("kohsuke/yo").listContributors()) {
+            System.out.println(c);
         }
-        System.out.println(lst.size());
     }
 
     private static void testRateLimit() throws Exception {

src/test/java/org/kohsuke/github/RepositoryTest.java

@@ -50,4 +50,12 @@ public class RepositoryTest extends AbstractGitHubApiTestBase {
         String mainLanguage = r.getLanguage();
         assertTrue(r.listLanguages().containsKey(mainLanguage));
     }
+
+    @Test // Issue #261
+    public void listEmptyContributors() throws IOException {
+        GitHub gh = GitHub.connect();
+        for (Contributor c : gh.getRepository("github-api-test-org/empty").listContributors()) {
+            System.out.println(c);
+        }
+    }
 }