1 files changed, 72 insertions, 0 deletions
diff --git a/java/com/google/gerrit/httpd/plugins/ContextMapper.java b/java/com/google/gerrit/httpd/plugins/ContextMapper.java
new file mode 100644
index 0000000000..85dd5a52e8
--- /dev/null
+++ b/java/com/google/gerrit/httpd/plugins/ContextMapper.java
@@ -0,0 +1,72 @@
+// Copyright (C) 2014 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.package com.google.gerrit.httpd.plugins;
+
+package com.google.gerrit.httpd.plugins;
+
+import com.google.common.base.Strings;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletRequestWrapper;
+
+class ContextMapper {
+  private static final String PLUGINS_PREFIX = "/plugins/";
+  private static final String AUTHORIZED_PREFIX = "/a" + PLUGINS_PREFIX;
+  private final String base;
+  private final String authorizedBase;
+
+  ContextMapper(String contextPath) {
+    base = Strings.nullToEmpty(contextPath) + PLUGINS_PREFIX;
+    authorizedBase = Strings.nullToEmpty(contextPath) + AUTHORIZED_PREFIX;
+  }
+
+  private static boolean isAuthorizedCall(HttpServletRequest req) {
+    return !Strings.isNullOrEmpty(req.getServletPath())
+        && req.getServletPath().startsWith(AUTHORIZED_PREFIX);
+  }
+
+  HttpServletRequest create(HttpServletRequest req, String name) {
+    String contextPath = (isAuthorizedCall(req) ? authorizedBase : base) + name;
+
+    return new WrappedRequest(req, contextPath);
+  }
+
+  public String getFullPath(String name) {
+    return base + name;
+  }
+
+  private static class WrappedRequest extends HttpServletRequestWrapper {
+    private final String contextPath;
+    private final String pathInfo;
+
+    private WrappedRequest(HttpServletRequest req, String contextPath) {
+      super(req);
+      this.contextPath = contextPath;
+      this.pathInfo = getRequestURI().substring(contextPath.length());
+    }
+
+    @Override
+    public String getServletPath() {
+      return "";
+    }
+
+    @Override
+    public String getContextPath() {
+      return contextPath;
+    }
+
+    @Override
+    public String getPathInfo() {
+      return pathInfo;
+    }
+  }
+}