mv com/google/domain/registry google/registry

This change renames directories in preparation for the great package
rename. The repository is now in a broken state because the code
itself hasn't been updated. However this should ensure that git
correctly preserves history for each file.

java/google/registry/util/UrlFetchUtils.java

@@ -0,0 +1,108 @@
+// Copyright 2016 The Domain Registry Authors. 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.util;
+
+import static com.google.common.io.BaseEncoding.base32;
+import static com.google.common.io.BaseEncoding.base64;
+import static com.google.common.net.HttpHeaders.AUTHORIZATION;
+import static com.google.common.net.HttpHeaders.CONTENT_DISPOSITION;
+import static com.google.common.net.HttpHeaders.CONTENT_LENGTH;
+import static com.google.common.net.HttpHeaders.CONTENT_TYPE;
+import static java.lang.String.format;
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import com.google.appengine.api.urlfetch.HTTPHeader;
+import com.google.appengine.api.urlfetch.HTTPRequest;
+import com.google.appengine.api.urlfetch.HTTPResponse;
+import com.google.common.base.Optional;
+import com.google.common.net.MediaType;
+
+import java.security.NoSuchAlgorithmException;
+import java.security.ProviderException;
+import java.security.SecureRandom;
+
+/** Helper methods for the App Engine URL fetch service. */
+public final class UrlFetchUtils {
+
+  @NonFinalForTesting
+  private static SecureRandom secureRandom = initSecureRandom();
+
+  /** Returns value of first header matching {@code name}. */
+  public static Optional<String> getHeaderFirst(HTTPResponse rsp, String name) {
+    return getHeaderFirstInternal(rsp.getHeadersUncombined(), name);
+  }
+
+  /** Returns value of first header matching {@code name}. */
+  public static Optional<String> getHeaderFirst(HTTPRequest req, String name) {
+    return getHeaderFirstInternal(req.getHeaders(), name);
+  }
+
+  private static Optional<String> getHeaderFirstInternal(Iterable<HTTPHeader> hdrs, String name) {
+    name = name.toLowerCase();
+    for (HTTPHeader header : hdrs) {
+      if (header.getName().toLowerCase().equals(name)) {
+        return Optional.of(header.getValue());
+      }
+    }
+    return Optional.absent();
+  }
+
+  /**
+   * Sets payload on request as a {@code multipart/form-data} request.
+   *
+   * <p>This is equivalent to running the command: {@code curl -F fieldName=@payload.txt URL}
+   *
+   * @see "http://www.ietf.org/rfc/rfc2388.txt"
+   */
+  public static <T> void setPayloadMultipart(
+      HTTPRequest request, String name, String filename, MediaType contentType, T data) {
+    String boundary = createMultipartBoundary();
+    StringBuilder multipart = new StringBuilder();
+    multipart.append(format("--%s\r\n", boundary));
+    multipart.append(format("%s: form-data; name=\"%s\"; filename=\"%s\"\r\n",
+        CONTENT_DISPOSITION, name, filename));
+    multipart.append(format("%s: %s\r\n", CONTENT_TYPE, contentType.toString()));
+    multipart.append("\r\n");
+    multipart.append(data);
+    multipart.append("\r\n");
+    multipart.append(format("--%s--", boundary));
+    byte[] payload = multipart.toString().getBytes(UTF_8);
+    request.addHeader(new HTTPHeader(CONTENT_TYPE, "multipart/form-data; boundary=" + boundary));
+    request.addHeader(new HTTPHeader(CONTENT_LENGTH, Integer.toString(payload.length)));
+    request.setPayload(payload);
+  }
+
+  private static String createMultipartBoundary() {
+    byte[] rand = new byte[5];  // Avoid base32 padding since `5 * 8 % log2(32) == 0`
+    secureRandom.nextBytes(rand);
+    return "------------------------------" + base32().encode(rand);
+  }
+
+  private static SecureRandom initSecureRandom() {
+    try {
+      return SecureRandom.getInstance("NativePRNG");
+    } catch (NoSuchAlgorithmException e) {
+      throw new ProviderException(e);
+    }
+  }
+
+  /** Sets the HTTP Basic Authentication header on an {@link HTTPRequest}. */
+  public static void setAuthorizationHeader(HTTPRequest req, Optional<String> login) {
+    if (login.isPresent()) {
+      String token = base64().encode(login.get().getBytes(UTF_8));
+      req.addHeader(new HTTPHeader(AUTHORIZATION, "Basic " + token));
+    }
+  }
+}