com.predic8.membrane.core.transport.http.ByteStreamLogging Maven / Gradle / Ivy

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/*
 *  Copyright 2017 predic8 GmbH, www.predic8.com
 *
 *    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.predic8.membrane.core.transport.http;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class ByteStreamLogging {

    static Logger log = LoggerFactory.getLogger(ByteStreamLogging.class);

    public static void log(String name, int b){
        log(name, new byte[]{(byte)b});
    }

    public static void log(String name, byte... b){
        log(name, b,0,b.length);
    }

    public static void log(String name, byte[] b, int off, int len){
        StringBuilder sb = new StringBuilder();
        sb.append("[").append(name).append("] ").append("[ ");
        for(int i = off; i < off+len; i++) {
            sb.append((int) b[i]).append(" ");
        }
        sb.append("]");
        System.out.println(new String(b,off,len));
        log.info(sb.toString());
    }

    public static OutputStream wrapConnectionOutputStream(Connection con, String name) {
        return new OutputStream() {
            @Override
            public void write(int b) throws IOException {
                log(name, b);
                con.out.write(b);
            }

            @Override
            public void write(byte[] b) throws IOException {
                log(name, b);
                con.out.write(b);
            }

            @Override
            public void write(byte[] b, int off, int len) throws IOException {
                log(name, b,off,len);
                con.out.write(b, off, len);
            }

            @Override
            public void close() throws IOException {
                con.out.close();
            }

            @Override
            public void flush() throws IOException {
                con.out.flush();
            }
        };
    }

    public static InputStream wrapConnectionInputStream(Connection con, String name) {
        return new InputStream() {
            @Override
            public int read() throws IOException {
                int res = con.in.read();
                log(name, res);
                return res;
            }

            @Override
            public int read(byte[] b) throws IOException {
                int res = con.in.read(b);
                log(name, b);
                return res;
            }

            @Override
            public int read(byte[] b, int off, int len) throws IOException {
                int res = con.in.read(b, off, len);
                log(name, b,off,len);
                return res;
            }

            @Override
            public void close() throws IOException {
                con.in.close();
            }

            @Override
            public boolean markSupported() {
                return con.in.markSupported();
            }

            @Override
            public int available() throws IOException {
                return con.in.available();
            }

            @Override
            public long skip(long n) throws IOException {
                return con.in.skip(n);
            }

            @Override
            public synchronized void mark(int readlimit) {
                con.in.mark(readlimit);
            }

            @Override
            public synchronized void reset() throws IOException {
                con.in.reset();
            }
        };
    }
}