Revert "HADOOP-13707. If kerberos is enabled while HTTP SPNEGO is not configured, some links cannot be accessed. Contributed by Yuanbo Liu"

Change-Id: I946a466a43d56c73bb0135384e73cb8513595461
(cherry picked from commit 80ee5248b2dda1cb8d122d4f362f2f8cf02b9467)

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/ConfServlet.java

@@ -20,7 +20,6 @@ package org.apache.hadoop.conf;
 import java.io.IOException;
 import java.io.Writer;
 
-import javax.servlet.ServletContext;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
@@ -59,12 +58,7 @@ public class ConfServlet extends HttpServlet {
   public void doGet(HttpServletRequest request, HttpServletResponse response)
       throws ServletException, IOException {
 
-    // If user is a static user and auth Type is null, that means
-    // there is a non-security environment and no need authorization,
-    // otherwise, do the authorization.
-    final ServletContext servletContext = getServletContext();
-    if (!HttpServer2.isStaticUserAndNoneAuthType(servletContext, request) &&
-        !HttpServer2.isInstrumentationAccessAllowed(servletContext,
+    if (!HttpServer2.isInstrumentationAccessAllowed(getServletContext(),
                                                    request, response)) {
       return;
     }

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/http/AdminAuthorizedServlet.java

@@ -19,7 +19,6 @@ package org.apache.hadoop.http;
 
 import java.io.IOException;
 
-import javax.servlet.ServletContext;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
@@ -36,13 +35,9 @@ public class AdminAuthorizedServlet extends DefaultServlet {
 
   @Override
   protected void doGet(HttpServletRequest request, HttpServletResponse response)
-      throws ServletException, IOException {
-    // If user is a static user and auth Type is null, that means
-    // there is a non-security environment and no need authorization,
-    // otherwise, do the authorization.
-    final ServletContext servletContext = getServletContext();
-    if (HttpServer2.isStaticUserAndNoneAuthType(servletContext, request) ||
-        HttpServer2.hasAdministratorAccess(servletContext, request,
+ throws ServletException, IOException {
+    // Do the authorization
+    if (HttpServer2.hasAdministratorAccess(getServletContext(), request,
         response)) {
       // Authorization is done. Just call super.
       super.doGet(request, response);

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/http/HttpServer2.java

@@ -17,9 +17,6 @@
  */
 package org.apache.hadoop.http;
 
-import static org.apache.hadoop.fs.CommonConfigurationKeys.DEFAULT_HADOOP_HTTP_STATIC_USER;
-import static org.apache.hadoop.fs.CommonConfigurationKeys.HADOOP_HTTP_STATIC_USER;
-
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
@@ -1358,24 +1355,6 @@ public final class HttpServer2 implements FilterContainer {
     return sb.toString();
   }
 
-  /**
-   * check whether user is static and unauthenticated, if the
-   * answer is TRUE, that means http sever is in non-security
-   * environment.
-   * @param servletContext the servlet context.
-   * @param request the servlet request.
-   * @return TRUE/FALSE based on the logic described above.
-   */
-  public static boolean isStaticUserAndNoneAuthType(
-      ServletContext servletContext, HttpServletRequest request) {
-    Configuration conf =
-        (Configuration) servletContext.getAttribute(CONF_CONTEXT_ATTRIBUTE);
-    final String authType = request.getAuthType();
-    final String staticUser = conf.get(HADOOP_HTTP_STATIC_USER,
-        DEFAULT_HADOOP_HTTP_STATIC_USER);
-    return authType == null && staticUser.equals(request.getRemoteUser());
-  }
-
   /**
    * Checks the user has privileges to access to instrumentation servlets.
    * <p/>
@@ -1473,14 +1452,9 @@ public final class HttpServer2 implements FilterContainer {
 
     @Override
     public void doGet(HttpServletRequest request, HttpServletResponse response)
-        throws ServletException, IOException {
-      // If user is a static user and auth Type is null, that means
-      // there is a non-security environment and no need authorization,
-      // otherwise, do the authorization.
-      final ServletContext servletContext = getServletContext();
-      if (!HttpServer2.isStaticUserAndNoneAuthType(servletContext, request) &&
-          !HttpServer2.isInstrumentationAccessAllowed(servletContext,
-              request, response)) {
+      throws ServletException, IOException {
+      if (!HttpServer2.isInstrumentationAccessAllowed(getServletContext(),
+                                                      request, response)) {
         return;
       }
       response.setContentType("text/plain; charset=UTF-8");

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/jmx/JMXJsonServlet.java

@@ -38,7 +38,6 @@ import javax.management.RuntimeMBeanException;
 import javax.management.openmbean.CompositeData;
 import javax.management.openmbean.CompositeType;
 import javax.management.openmbean.TabularData;
-import javax.servlet.ServletContext;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
@@ -170,12 +169,7 @@ public class JMXJsonServlet extends HttpServlet {
   @Override
   public void doGet(HttpServletRequest request, HttpServletResponse response) {
     try {
-      // If user is a static user and auth Type is null, that means
-      // there is a non-security environment and no need authorization,
-      // otherwise, do the authorization.
-      final ServletContext servletContext = getServletContext();
-      if (!HttpServer2.isStaticUserAndNoneAuthType(servletContext, request) &&
-          !isInstrumentationAccessAllowed(request, response)) {
+      if (!isInstrumentationAccessAllowed(request, response)) {
         return;
       }
       JsonGenerator jg = null;

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/log/LogLevel.java

@@ -27,7 +27,6 @@ import java.util.regex.Pattern;
 
 import javax.net.ssl.HttpsURLConnection;
 import javax.net.ssl.SSLSocketFactory;
-import javax.servlet.ServletContext;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
@@ -324,13 +323,9 @@ public class LogLevel {
     public void doGet(HttpServletRequest request, HttpServletResponse response
         ) throws ServletException, IOException {
 
-      // If user is a static user and auth Type is null, that means
-      // there is a non-security environment and no need authorization,
-      // otherwise, do the authorization.
-      final ServletContext servletContext = getServletContext();
-      if (!HttpServer2.isStaticUserAndNoneAuthType(servletContext, request) &&
-          !HttpServer2.hasAdministratorAccess(servletContext,
-              request, response)) {
+      // Do the authorization
+      if (!HttpServer2.hasAdministratorAccess(getServletContext(), request,
+          response)) {
         return;
       }
 

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/http/TestHttpServer.java

@@ -69,9 +69,6 @@ import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.Executor;
 import java.util.concurrent.Executors;
 
-import static org.apache.hadoop.fs.CommonConfigurationKeys.DEFAULT_HADOOP_HTTP_STATIC_USER;
-import static org.apache.hadoop.fs.CommonConfigurationKeys.HADOOP_HTTP_STATIC_USER;
-
 public class TestHttpServer extends HttpServerFunctionalTest {
   static final Logger LOG = LoggerFactory.getLogger(TestHttpServer.class);
   private static HttpServer2 server;
@@ -485,7 +482,7 @@ public class TestHttpServer extends HttpServerFunctionalTest {
     String serverURL = "http://"
         + NetUtils.getHostPortString(myServer.getConnectorAddress(0)) + "/";
     for (String servlet : new String[] { "conf", "logs", "stacks",
-        "logLevel", "jmx" }) {
+        "logLevel" }) {
       for (String user : new String[] { "userA", "userB", "userC", "userD" }) {
         assertEquals(HttpURLConnection.HTTP_OK, getHttpStatusCode(serverURL
             + servlet, user));
@@ -493,18 +490,6 @@ public class TestHttpServer extends HttpServerFunctionalTest {
       assertEquals(HttpURLConnection.HTTP_FORBIDDEN, getHttpStatusCode(
           serverURL + servlet, "userE"));
     }
-
-    // hadoop.security.authorization is set as true while
-    // hadoop.http.authentication.type's value is `simple`(default value)
-    // in this case, static user has administrator access
-    final String staticUser = conf.get(HADOOP_HTTP_STATIC_USER,
-        DEFAULT_HADOOP_HTTP_STATIC_USER);
-    for (String servlet : new String[] {"conf", "logs", "stacks",
-        "logLevel", "jmx"}) {
-      assertEquals(HttpURLConnection.HTTP_OK, getHttpStatusCode(
-          serverURL + servlet, staticUser));
-    }
-
     myServer.stop();
   }