prompt authentication again for failed subversion authentication and improved error message for missing privileges

scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/ScmSvnErrorCode.java

@@ -0,0 +1,71 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer. 2. Redistributions in
+ * binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution. 3. Neither the name of SCM-Manager;
+ * nor the names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.repository;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import org.tmatesoft.svn.core.SVNErrorCode;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class ScmSvnErrorCode extends SVNErrorCode
+{
+
+  /** Field description */
+  public static final SVNErrorCode AUTHN_FAILED =
+    new ScmSvnErrorCode(AUTHN_CATEGORY, 4, "Authentication failed");
+
+  /** Field description */
+  public static final SVNErrorCode AUTHZ_NOT_ENOUGH_PRIVILEGES =
+    new ScmSvnErrorCode(AUTHZ_CATEGORY, 4,
+      "You do not have enough access privileges for this operation.");
+
+  /** Field description */
+  private static final long serialVersionUID = -6864996390796610410L;
+
+  //~--- constructors ---------------------------------------------------------
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param category
+   * @param index
+   * @param description
+   */
+  protected ScmSvnErrorCode(int category, int index, String description)
+  {
+    super(category, index, description);
+  }
+}

scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/SvnUtil.java

@@ -37,23 +37,37 @@ package sonia.scm.repository;
 
 import com.google.common.base.Strings;
 import com.google.common.collect.Lists;
+import com.google.common.io.Closeables;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import org.tmatesoft.svn.core.SVNErrorCode;
 import org.tmatesoft.svn.core.SVNLogEntry;
 import org.tmatesoft.svn.core.SVNLogEntryPath;
+import org.tmatesoft.svn.core.internal.io.dav.DAVElement;
+import org.tmatesoft.svn.core.internal.server.dav.DAVXMLUtil;
+import org.tmatesoft.svn.core.internal.util.SVNEncodingUtil;
+import org.tmatesoft.svn.core.internal.util.SVNXMLUtil;
 import org.tmatesoft.svn.core.io.SVNRepository;
 import org.tmatesoft.svn.core.wc.SVNClientManager;
 import org.tmatesoft.svn.core.wc.admin.SVNChangeEntry;
 
+import sonia.scm.util.HttpUtil;
 import sonia.scm.util.Util;
 
 //~--- JDK imports ------------------------------------------------------------
 
+import java.io.IOException;
+import java.io.PrintWriter;
+
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
 /**
  *
  * @author Sebastian Sdorra
@@ -61,6 +75,12 @@ import java.util.Map;
 public final class SvnUtil
 {
 
+  /** Field description */
+  public static final String XML_CONTENT_TYPE = "text/xml; charset=\"utf-8\"";
+
+  /** Field description */
+  private static final String HEADER_USERAGENT = "User-Agent";
+
   /** Field description */
   private static final String ID_TRANSACTION_PREFIX = "-1:";
 
@@ -70,6 +90,9 @@ public final class SvnUtil
    */
   private static final char TYPE_UPDATED = 'U';
 
+  /** Field description */
+  private static final String USERAGENT_SVN = "svn/";
+
   /**
    * the logger for SvnUtil
    */
@@ -232,6 +255,39 @@ public final class SvnUtil
     return changesets;
   }
 
+  /**
+   * Method description
+   *
+   * @param errorCode
+   *
+   * @return
+   */
+  public static String createErrorBody(SVNErrorCode errorCode)
+  {
+    StringBuffer xmlBuffer = new StringBuffer();
+
+    SVNXMLUtil.addXMLHeader(xmlBuffer);
+
+    List<String> namespaces = Lists.newArrayList(DAVElement.DAV_NAMESPACE,
+                                DAVElement.SVN_APACHE_PROPERTY_NAMESPACE);
+
+    SVNXMLUtil.openNamespaceDeclarationTag(SVNXMLUtil.DAV_NAMESPACE_PREFIX,
+      DAVXMLUtil.SVN_DAV_ERROR_TAG, namespaces, SVNXMLUtil.PREFIX_MAP,
+      xmlBuffer);
+
+    SVNXMLUtil.openXMLTag(SVNXMLUtil.SVN_APACHE_PROPERTY_PREFIX,
+      "human-readable", SVNXMLUtil.XML_STYLE_NORMAL, "errcode",
+      String.valueOf(errorCode.getCode()), xmlBuffer);
+    xmlBuffer.append(
+      SVNEncodingUtil.xmlEncodeCDATA(errorCode.getDescription()));
+    SVNXMLUtil.closeXMLTag(SVNXMLUtil.SVN_APACHE_PROPERTY_PREFIX,
+      "human-readable", xmlBuffer);
+    SVNXMLUtil.closeXMLTag(SVNXMLUtil.DAV_NAMESPACE_PREFIX,
+      DAVXMLUtil.SVN_DAV_ERROR_TAG, xmlBuffer);
+
+    return xmlBuffer.toString();
+  }
+
   /**
    * Method description
    *
@@ -266,6 +322,39 @@ public final class SvnUtil
     }
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @param request
+   * @param response
+   * @param statusCode
+   * @param errorCode
+   *
+   * @throws IOException
+   */
+  public static void sendError(HttpServletRequest request,
+    HttpServletResponse response, int statusCode, SVNErrorCode errorCode)
+    throws IOException
+  {
+    HttpUtil.drainBody(request);
+
+    response.setStatus(statusCode);
+    response.setContentType(XML_CONTENT_TYPE);
+
+    PrintWriter writer = null;
+
+    try
+    {
+      writer = response.getWriter();
+      writer.println(createErrorBody(errorCode));
+    }
+    finally
+    {
+      Closeables.close(writer, true);
+    }
+  }
+
   //~--- get methods ----------------------------------------------------------
 
   /**
@@ -311,6 +400,20 @@ public final class SvnUtil
     return id.substring(ID_TRANSACTION_PREFIX.length());
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @param request
+   *
+   * @return
+   */
+  public static boolean isSvnClient(HttpServletRequest request)
+  {
+    return Strings.nullToEmpty(request.getHeader(HEADER_USERAGENT)).toLowerCase(
+      Locale.ENGLISH).startsWith(USERAGENT_SVN);
+  }
+
   /**
    * Method description
    *

scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/web/SvnBasicAuthenticationFilter.java

@@ -0,0 +1,105 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer. 2. Redistributions in
+ * binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution. 3. Neither the name of SCM-Manager;
+ * nor the names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.web;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+
+import org.tmatesoft.svn.core.SVNErrorCode;
+
+import sonia.scm.config.ScmConfiguration;
+import sonia.scm.repository.ScmSvnErrorCode;
+import sonia.scm.repository.SvnUtil;
+import sonia.scm.web.filter.AutoLoginModule;
+import sonia.scm.web.filter.BasicAuthenticationFilter;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.IOException;
+
+import java.util.Set;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import sonia.scm.util.HttpUtil;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+@Singleton
+public class SvnBasicAuthenticationFilter extends BasicAuthenticationFilter
+{
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param configuration
+   * @param autoLoginModules
+   */
+  @Inject
+  public SvnBasicAuthenticationFilter(ScmConfiguration configuration,
+    Set<AutoLoginModule> autoLoginModules)
+  {
+    super(configuration, autoLoginModules);
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Sends unauthorized instead of forbidden for svn clients, because the
+   * svn client prompts again for authentication.
+   *
+   *
+   * @param request http request
+   * @param response http response
+   *
+   * @throws IOException
+   */
+  @Override
+  protected void sendFailedAuthenticationError(HttpServletRequest request,
+    HttpServletResponse response)
+    throws IOException
+  {
+    if (SvnUtil.isSvnClient(request))
+    {
+      HttpUtil.sendUnauthorized(response, configuration.getRealmDescription());
+    }
+    else
+    {
+      super.sendFailedAuthenticationError(request, response);
+    }
+  }
+}

scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/web/SvnPermissionFilter.java

@@ -39,15 +39,22 @@ import com.google.common.collect.ImmutableSet;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 
+import org.tmatesoft.svn.core.SVNErrorCode;
+
 import sonia.scm.config.ScmConfiguration;
 import sonia.scm.repository.RepositoryProvider;
+import sonia.scm.repository.ScmSvnErrorCode;
+import sonia.scm.repository.SvnUtil;
 import sonia.scm.web.filter.ProviderPermissionFilter;
 
 //~--- JDK imports ------------------------------------------------------------
 
+import java.io.IOException;
+
 import java.util.Set;
 
 import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
 
 /**
  *
@@ -58,22 +65,16 @@ public class SvnPermissionFilter extends ProviderPermissionFilter
 {
 
   /** Field description */
-  private static Set<String> WRITEMETHOD_SET = ImmutableSet.of("MKACTIVITY",
-                                                 "PROPPATCH", "PUT",
-                                                 "CHECKOUT", "MKCOL", "MOVE",
-                                                 "COPY", "DELETE", "LOCK",
-                                                 "UNLOCK", "MERGE");
+  private static final Set<String> WRITEMETHOD_SET =
+    ImmutableSet.of("MKACTIVITY", "PROPPATCH", "PUT", "CHECKOUT", "MKCOL",
+      "MOVE", "COPY", "DELETE", "LOCK", "UNLOCK", "MERGE");
 
   //~--- constructors ---------------------------------------------------------
 
   /**
    * Constructs ...
    *
-   *
-   *
-   *
    * @param configuration
-   * @param securityContextProvider
    * @param repository
    */
   @Inject
@@ -83,6 +84,33 @@ public class SvnPermissionFilter extends ProviderPermissionFilter
     super(configuration, repository);
   }
 
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param request
+   * @param response
+   *
+   * @throws IOException
+   */
+  @Override
+  protected void sendNotEnoughPrivilegesError(HttpServletRequest request,
+    HttpServletResponse response)
+    throws IOException
+  {
+    if (SvnUtil.isSvnClient(request))
+    {
+      SvnUtil.sendError(request, response, HttpServletResponse.SC_FORBIDDEN,
+        ScmSvnErrorCode.AUTHZ_NOT_ENOUGH_PRIVILEGES);
+    }
+    else
+    {
+      super.sendNotEnoughPrivilegesError(request, response);
+    }
+  }
+
   //~--- get methods ----------------------------------------------------------
 
   /**

scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/web/SvnServletModule.java

@@ -69,7 +69,7 @@ public class SvnServletModule extends ServletModule
   protected void configureServlets()
   {
     filter(PATTERN_SVN).through(SvnGZipFilter.class);
-    filter(PATTERN_SVN).through(BasicAuthenticationFilter.class);
+    filter(PATTERN_SVN).through(SvnBasicAuthenticationFilter.class);
     filter(PATTERN_SVN).through(SvnPermissionFilter.class);
 
     Map<String, String> parameters = new HashMap<String, String>();