Import code from internal repository to git

java/com/google/domain/registry/request/Response.java

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+// Copyright 2016 Google Inc. All Rights Reserved.
+//
+// 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.domain.registry.request;
+
+import com.google.common.net.MediaType;
+
+import org.joda.time.DateTime;
+
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * HTTP request response object.
+ *
+ * @see ResponseImpl
+ */
+public interface Response {
+
+  /** Sets the HTTP status code. */
+  void setStatus(int status);
+
+  /** Sets the HTTP Content-Type and possibly encoding. */
+  void setContentType(MediaType contentType);
+
+  /**
+   * Writes the HTTP payload.
+   *
+   * @throws IllegalStateException if you've already written the payload
+   */
+  void setPayload(String payload);
+
+  /**
+   * Writes an HTTP header to the response.
+   *
+   * @see HttpServletResponse#setHeader(String, String)
+   */
+  void setHeader(String header, String value);
+
+  /**
+   * Writes an HTTP header with a timestamp value.
+   *
+   * @see HttpServletResponse#setDateHeader(String, long)
+   */
+  void setDateHeader(String header, DateTime timestamp);
+
+  /**
+   * Sends a JavaScript redirect HTTP response.
+   *
+   * GAE handles a HTTP 302 status as an error, so using this is helpful for responses that might
+   * sometimes be consumed by GAE code, since it performs a redirect while also returning HTTP 200.
+   */
+  void sendJavaScriptRedirect(String redirectUrl);
+}