com.quhaodian.server.JsonRpcServletTransport Maven / Gradle / Ivy
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/*
* Copyright (C) 2011 ritwik.net
*
* 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.quhaodian.server;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class JsonRpcServletTransport implements JsonRpcServerTransport {
private static final int BUFF_LENGTH = 1024;
private final HttpServletRequest req;
private final HttpServletResponse resp;
public JsonRpcServletTransport(HttpServletRequest req, HttpServletResponse resp) {
this.req = req;
this.resp = resp;
}
public String readRequest() throws Exception {
InputStream in = null;
try {
String body = "";
in = req.getInputStream();
ByteBuffer byteData = readToByteBuffer(in);
body = Charset.forName("UTF-8").decode(byteData).toString();
return body;
} finally {
if (in != null) {
in.close();
}
}
}
private static final int bufferSize = 0x20000; // ~130K.
public static ByteBuffer readToByteBuffer(InputStream inStream)
throws IOException {
byte[] buffer = new byte[bufferSize];
ByteArrayOutputStream outStream = new ByteArrayOutputStream(bufferSize);
int read;
while (true) {
read = inStream.read(buffer);
if (read == -1) {
break;
}
outStream.write(buffer, 0, read);
}
ByteBuffer byteData = ByteBuffer.wrap(outStream.toByteArray());
return byteData;
}
public void writeResponse(String responseData) throws Exception {
resp.setCharacterEncoding("UTF-8");
byte[] data = responseData.getBytes(resp.getCharacterEncoding());
resp.addHeader("Content-Type", "application/json");
resp.setHeader("Content-Length", Integer.toString(data.length));
PrintWriter out = null;
try {
out = resp.getWriter();
out.write(responseData);
out.flush();
} finally {
if (out != null) {
out.close();
}
}
}
}