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// Copyright 2008 Google Inc.
//
// 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.codereview.rpc;
import com.google.protobuf.Message;
import org.apache.commons.httpclient.methods.RequestEntity;
import org.spearce.jgit.lib.NullProgressMonitor;
import org.spearce.jgit.util.TemporaryBuffer;
import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.DeflaterOutputStream;
/**
* Formats a protocol buffer Message into an HTTP request body.
* <p>
* The compressed binary serialized form is always used.
*/
public class MessageRequestEntity implements RequestEntity {
/** Content-Type for a protocol buffer. */
public static final String TYPE = "application/x-google-protobuf";
private final Message msg;
private final String name;
private final TemporaryBuffer temp;
/**
* Create a new request for a single message.
*
* @param m the message to serialize and transmit.
* @throws IOException the message could not be compressed into temporary
* storage. The local file system may be full, or the message is
* unable to compress itself.
*/
public MessageRequestEntity(final Message m) throws IOException {
msg = m;
name = msg.getDescriptorForType().getFullName();
temp = new TemporaryBuffer();
final DeflaterOutputStream dos = new DeflaterOutputStream(temp);
try {
msg.writeTo(dos);
} finally {
dos.close();
}
}
public long getContentLength() {
return (int) temp.length();
}
public String getContentType() {
return TYPE + "; name=" + name + "; compress=deflate";
}
public boolean isRepeatable() {
return true;
}
public void writeRequest(final OutputStream out) throws IOException {
temp.writeTo(out, NullProgressMonitor.INSTANCE);
}
public void destroy() {
temp.destroy();
}
@Override
public String toString() {
final StringBuilder r = new StringBuilder();
r.append(name);
r.append('\n');
r.append(msg.toString());
return r.toString();
}
}
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