| 1 | /** |
| 2 | * |
| 3 | * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com> |
| 4 | * |
| 5 | * ==================================================================== |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | * ==================================================================== |
| 18 | */ |
| 19 | package org.jclouds.gae; |
| 20 | |
| 21 | import static com.google.appengine.api.urlfetch.FetchOptions.Builder.disallowTruncate; |
| 22 | |
| 23 | import java.io.ByteArrayOutputStream; |
| 24 | import java.io.IOException; |
| 25 | import java.io.InputStream; |
| 26 | import java.net.MalformedURLException; |
| 27 | import java.net.URL; |
| 28 | import java.util.Map.Entry; |
| 29 | import java.util.Set; |
| 30 | |
| 31 | import javax.inject.Inject; |
| 32 | import javax.inject.Singleton; |
| 33 | import javax.ws.rs.core.HttpHeaders; |
| 34 | |
| 35 | import org.jclouds.http.HttpRequest; |
| 36 | import org.jclouds.http.HttpUtils; |
| 37 | import org.jclouds.io.Payload; |
| 38 | |
| 39 | import com.google.appengine.api.urlfetch.FetchOptions; |
| 40 | import com.google.appengine.api.urlfetch.HTTPHeader; |
| 41 | import com.google.appengine.api.urlfetch.HTTPMethod; |
| 42 | import com.google.appengine.api.urlfetch.HTTPRequest; |
| 43 | import com.google.appengine.repackaged.com.google.common.base.Throwables; |
| 44 | import com.google.common.base.Function; |
| 45 | import com.google.common.collect.ImmutableSet; |
| 46 | import com.google.common.io.Closeables; |
| 47 | |
| 48 | /** |
| 49 | * |
| 50 | * @author Adrian Cole |
| 51 | */ |
| 52 | @Singleton |
| 53 | public class ConvertToGaeRequest implements Function<HttpRequest, HTTPRequest> { |
| 54 | public static final String USER_AGENT = "jclouds/1.0 urlfetch/1.4.3"; |
| 55 | protected final HttpUtils utils; |
| 56 | // http://code.google.com/appengine/docs/java/urlfetch/overview.html |
| 57 | public final Set<String> prohibitedHeaders = ImmutableSet.of("Accept-Encoding", "Content-Length", "Host", "Var", |
| 58 | "X-Forwarded-For"); |
| 59 | |
| 60 | @Inject |
| 61 | ConvertToGaeRequest(HttpUtils utils) { |
| 62 | this.utils = utils; |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * byte [] content is replayable and the only content type supportable by GAE. As such, we |
| 67 | * convert the original request content to a byte array. |
| 68 | */ |
| 69 | @Override |
| 70 | public HTTPRequest apply(HttpRequest request) { |
| 71 | URL url = null; |
| 72 | try { |
| 73 | url = request.getEndpoint().toURL(); |
| 74 | } catch (MalformedURLException e) { |
| 75 | Throwables.propagate(e); |
| 76 | } |
| 77 | |
| 78 | FetchOptions options = disallowTruncate(); |
| 79 | options.doNotFollowRedirects(); |
| 80 | if (utils.relaxHostname() || utils.trustAllCerts()) |
| 81 | options.doNotFollowRedirects(); |
| 82 | options.setDeadline(10.0); |
| 83 | |
| 84 | HTTPRequest gaeRequest = new HTTPRequest(url, HTTPMethod.valueOf(request.getMethod().toString()), options); |
| 85 | |
| 86 | for (String header : request.getHeaders().keySet()) { |
| 87 | for (String value : request.getHeaders().get(header)) { |
| 88 | if (!prohibitedHeaders.contains(header)) |
| 89 | gaeRequest.addHeader(new HTTPHeader(header, value)); |
| 90 | } |
| 91 | } |
| 92 | gaeRequest.addHeader(new HTTPHeader(HttpHeaders.USER_AGENT, USER_AGENT)); |
| 93 | /** |
| 94 | * byte [] content is replayable and the only content type supportable by GAE. As such, we |
| 95 | * convert the original request content to a byte array. |
| 96 | */ |
| 97 | if (request.getPayload() != null) { |
| 98 | InputStream input = request.getPayload().getInput(); |
| 99 | try { |
| 100 | ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| 101 | request.getPayload().writeTo(out); |
| 102 | byte[] array = out.toByteArray(); |
| 103 | if (!request.getPayload().isRepeatable()) { |
| 104 | Payload oldPayload = request.getPayload(); |
| 105 | request.setPayload(array); |
| 106 | HttpUtils.copy(oldPayload.getContentMetadata(), request.getPayload().getContentMetadata()); |
| 107 | } |
| 108 | gaeRequest.setPayload(array); |
| 109 | if (array.length > 0) { |
| 110 | gaeRequest.setHeader(new HTTPHeader("Expect", "100-continue")); |
| 111 | } |
| 112 | } catch (IOException e) { |
| 113 | Throwables.propagate(e); |
| 114 | } finally { |
| 115 | Closeables.closeQuietly(input); |
| 116 | } |
| 117 | |
| 118 | for (Entry<String, String> header : HttpUtils.getContentHeadersFromMetadata( |
| 119 | request.getPayload().getContentMetadata()).entries()) { |
| 120 | if (!prohibitedHeaders.contains(header.getKey())) |
| 121 | gaeRequest.setHeader(new HTTPHeader(header.getKey(), header.getValue())); |
| 122 | } |
| 123 | } |
| 124 | return gaeRequest; |
| 125 | } |
| 126 | } |