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/*
* 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.apache.tuscany.hessian.channel;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import org.apache.tuscany.spi.wire.Message;
import org.apache.tuscany.spi.wire.MessageImpl;
import com.caucho.hessian.client.HessianRuntimeException;
import com.caucho.hessian.io.HessianInput;
import com.caucho.hessian.io.HessianOutput;
import org.apache.tuscany.hessian.Channel;
import org.apache.tuscany.hessian.InvocationException;
/**
* A channel implementation that uses HTTP as the transport protocol
*
* @version $Rev$ $Date$
*/
public class HttpChannel implements Channel {
private URL destinationUrl;
private boolean chunkedPost;
private String basicAuth;
private String user;
private String password;
private int readTimeout;
public HttpChannel(URL url) {
this.destinationUrl = url;
}
public Message send(String operation, Class<?> returnType, Message message) throws InvocationException {
URLConnection conn;
try {
conn = openConnection(destinationUrl);
} catch (IOException e) {
throw new InvocationException(e);
}
if (chunkedPost && conn instanceof HttpURLConnection) {
HttpURLConnection httpConn = (HttpURLConnection) conn;
httpConn.setChunkedStreamingMode(8 * 1024);
}
OutputStream os;
try {
os = conn.getOutputStream();
} catch (IOException e) {
throw new HessianRuntimeException(e);
}
try {
HessianOutput out = new HessianOutput(os);
Object[] args;
Object payload = message.getBody();
if (payload != null && !payload.getClass().isArray()) {
args = new Object[]{payload};
} else {
args = (Object[]) payload;
}
out.call(operation, args);
out.flush();
InputStream is = null;
if (conn instanceof HttpURLConnection) {
HttpURLConnection httpConn = (HttpURLConnection) conn;
int code = httpConn.getResponseCode();
if (code != 200) {
StringBuffer sb = new StringBuffer();
int ch;
try {
is = httpConn.getInputStream();
if (is != null) {
while ((ch = is.read()) >= 0) {
sb.append((char) ch);
}
is.close();
}
is = httpConn.getErrorStream();
if (is != null) {
while ((ch = is.read()) >= 0) {
sb.append((char) ch);
}
}
} catch (FileNotFoundException e) {
throw new InvocationException(e);
} catch (IOException e) {
if (is == null) {
throw new InvocationException("Invocation exception", String.valueOf(code), e);
}
}
if (is != null) {
is.close();
}
throw new InvocationException("Invocation exception", sb.toString());
}
}
is = conn.getInputStream();
HessianInput in = new HessianInput(is);
// FIXME handle faults
Object reply = in.readReply(returnType);
Message msg = new MessageImpl();
msg.setBody(reply);
return msg;
} catch (RuntimeException e) {
if (conn instanceof HttpURLConnection) {
((HttpURLConnection) conn).disconnect();
}
throw e;
} catch (Throwable e) {
if (conn instanceof HttpURLConnection) {
((HttpURLConnection) conn).disconnect();
}
throw new InvocationException(e);
}
}
protected URLConnection openConnection(URL url) throws IOException {
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
if (readTimeout > 0) {
conn.setReadTimeout(readTimeout);
}
conn.setRequestProperty("Content-Type", "x-application/hessian");
if (basicAuth != null)
conn.setRequestProperty("Authorization", basicAuth);
else if (user != null && password != null) {
basicAuth = "Basic " + base64(user + ":" + password);
conn.setRequestProperty("Authorization", basicAuth);
}
return conn;
}
private String base64(String value) {
StringBuffer cb = new StringBuffer();
int i = 0;
for (i = 0; i + 2 < value.length(); i += 3) {
long chunk = (int) value.charAt(i);
chunk = (chunk << 8) + (int) value.charAt(i + 1);
chunk = (chunk << 8) + (int) value.charAt(i + 2);
cb.append(encode(chunk >> 18));
cb.append(encode(chunk >> 12));
cb.append(encode(chunk >> 6));
cb.append(encode(chunk));
}
if (i + 1 < value.length()) {
long chunk = (int) value.charAt(i);
chunk = (chunk << 8) + (int) value.charAt(i + 1);
chunk <<= 8;
cb.append(encode(chunk >> 18));
cb.append(encode(chunk >> 12));
cb.append(encode(chunk >> 6));
cb.append('=');
} else if (i < value.length()) {
long chunk = (int) value.charAt(i);
chunk <<= 16;
cb.append(encode(chunk >> 18));
cb.append(encode(chunk >> 12));
cb.append('=');
cb.append('=');
}
return cb.toString();
}
public static char encode(long d) {
d &= 0x3f;
if (d < 26)
return (char) (d + 'A');
else if (d < 52)
return (char) (d + 'a' - 26);
else if (d < 62)
return (char) (d + '0' - 52);
else if (d == 62)
return '+';
else
return '/';
}
}
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