/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.jclouds.gae;
import static com.google.appengine.api.urlfetch.FetchOptions.Builder.disallowTruncate;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Map.Entry;
import java.util.Set;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.jclouds.http.HttpRequest;
import org.jclouds.http.HttpUtils;
import org.jclouds.io.ContentMetadataCodec;
import org.jclouds.io.Payload;
import org.jclouds.util.Closeables2;
import com.google.appengine.api.urlfetch.FetchOptions;
import com.google.appengine.api.urlfetch.HTTPHeader;
import com.google.appengine.api.urlfetch.HTTPMethod;
import com.google.appengine.api.urlfetch.HTTPRequest;
import com.google.appengine.repackaged.com.google.common.base.Throwables;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableSet;
import com.google.common.io.ByteStreams;
import com.google.common.net.HttpHeaders;
@Singleton
public class ConvertToGaeRequest implements Function<HttpRequest, HTTPRequest> {
public static final String USER_AGENT = "jclouds/1.0 urlfetch/1.4.3";
// http://code.google.com/appengine/docs/java/urlfetch/overview.html
public final Set<String> prohibitedHeaders = ImmutableSet.of("Accept-Encoding", "Content-Length", "Host", "Var",
"X-Forwarded-For");
protected final HttpUtils utils;
protected final ContentMetadataCodec contentMetadataCodec;
@Inject
ConvertToGaeRequest(HttpUtils utils, ContentMetadataCodec contentMetadataCodec) {
this.utils = utils;
this.contentMetadataCodec = contentMetadataCodec;
}
/**
* byte [] content is replayable and the only content type supportable by GAE. As such, we
* convert the original request content to a byte array.
*/
@Override
public HTTPRequest apply(HttpRequest request) {
URL url = null;
try {
url = request.getEndpoint().toURL();
} catch (MalformedURLException e) {
Throwables.propagate(e);
}
FetchOptions options = disallowTruncate();
options.doNotFollowRedirects();
if (utils.relaxHostname() || utils.trustAllCerts())
options.doNotFollowRedirects();
options.setDeadline(10.0);
HTTPRequest gaeRequest = new HTTPRequest(url, HTTPMethod.valueOf(request.getMethod().toString()), options);
for (Entry<String, String> entry : request.getHeaders().entries()) {
String header = entry.getKey();
if (!prohibitedHeaders.contains(header))
gaeRequest.addHeader(new HTTPHeader(header, entry.getValue()));
}
gaeRequest.addHeader(new HTTPHeader(HttpHeaders.USER_AGENT, USER_AGENT));
/**
* byte [] content is replayable and the only content type supportable by GAE. As such, we
* convert the original request content to a byte array.
*/
if (request.getPayload() != null) {
InputStream input = request.getPayload().getInput();
try {
byte[] array = ByteStreams.toByteArray(input);
if (!request.getPayload().isRepeatable()) {
Payload oldPayload = request.getPayload();
request.setPayload(array);
HttpUtils.copy(oldPayload.getContentMetadata(), request.getPayload().getContentMetadata());
}
gaeRequest.setPayload(array);
if (array.length > 0) {
gaeRequest.setHeader(new HTTPHeader("Expect", "100-continue"));
}
} catch (IOException e) {
Throwables.propagate(e);
} finally {
Closeables2.closeQuietly(input);
}
for (Entry<String, String> header : contentMetadataCodec.toHeaders(
request.getPayload().getContentMetadata()).entries()) {
if (!prohibitedHeaders.contains(header.getKey()))
gaeRequest.setHeader(new HTTPHeader(header.getKey(), header.getValue()));
}
}
return gaeRequest;
}
}