/**
* Licensed to jclouds, Inc. (jclouds) under one or more
* contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. jclouds 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.ByteArrayOutputStream;
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 javax.ws.rs.core.HttpHeaders;
import org.jclouds.http.HttpRequest;
import org.jclouds.http.HttpUtils;
import org.jclouds.io.ContentMetadataCodec;
import org.jclouds.io.Payload;
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.Closeables;
/**
*
* @author Adrian Cole
*/
@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 {
ByteArrayOutputStream out = new ByteArrayOutputStream();
request.getPayload().writeTo(out);
byte[] array = out.toByteArray();
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 {
Closeables.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;
}
}