michael@0: /*
michael@0:  * ====================================================================
michael@0:  *
michael@0:  *  Licensed to the Apache Software Foundation (ASF) under one or more
michael@0:  *  contributor license agreements.  See the NOTICE file distributed with
michael@0:  *  this work for additional information regarding copyright ownership.
michael@0:  *  The ASF licenses this file to You under the Apache License, Version 2.0
michael@0:  *  (the "License"); you may not use this file except in compliance with
michael@0:  *  the License.  You may obtain a copy of the License at
michael@0:  *
michael@0:  *      http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  *  Unless required by applicable law or agreed to in writing, software
michael@0:  *  distributed under the License is distributed on an "AS IS" BASIS,
michael@0:  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
michael@0:  *  See the License for the specific language governing permissions and
michael@0:  *  limitations under the License.
michael@0:  * ====================================================================
michael@0:  *
michael@0:  * This software consists of voluntary contributions made by many
michael@0:  * individuals on behalf of the Apache Software Foundation.  For more
michael@0:  * information on the Apache Software Foundation, please see
michael@0:  * <http://www.apache.org/>.
michael@0:  *
michael@0:  */
michael@0: 
michael@0: package ch.boye.httpclientandroidlib.impl.conn;
michael@0: 
michael@0: import java.io.IOException;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.annotation.Immutable;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.io.EofSensor;
michael@0: import ch.boye.httpclientandroidlib.io.HttpTransportMetrics;
michael@0: import ch.boye.httpclientandroidlib.io.SessionInputBuffer;
michael@0: import ch.boye.httpclientandroidlib.protocol.HTTP;
michael@0: import ch.boye.httpclientandroidlib.util.CharArrayBuffer;
michael@0: 
michael@0: /**
michael@0:  * Logs all data read to the wire LOG.
michael@0:  *
michael@0:  *
michael@0:  * @since 4.0
michael@0:  */
michael@0: @Immutable
michael@0: public class LoggingSessionInputBuffer implements SessionInputBuffer, EofSensor {
michael@0: 
michael@0:     /** Original session input buffer. */
michael@0:     private final SessionInputBuffer in;
michael@0: 
michael@0:     private final EofSensor eofSensor;
michael@0: 
michael@0:     /** The wire log to use for writing. */
michael@0:     private final Wire wire;
michael@0: 
michael@0:     private final String charset;
michael@0: 
michael@0:     /**
michael@0:      * Create an instance that wraps the specified session input buffer.
michael@0:      * @param in The session input buffer.
michael@0:      * @param wire The wire log to use.
michael@0:      * @param charset protocol charset, <code>ASCII</code> if <code>null</code>
michael@0:      */
michael@0:     public LoggingSessionInputBuffer(
michael@0:             final SessionInputBuffer in, final Wire wire, final String charset) {
michael@0:         super();
michael@0:         this.in = in;
michael@0:         this.eofSensor = in instanceof EofSensor ? (EofSensor) in : null;
michael@0:         this.wire = wire;
michael@0:         this.charset = charset != null ? charset : HTTP.ASCII;
michael@0:     }
michael@0: 
michael@0:     public LoggingSessionInputBuffer(final SessionInputBuffer in, final Wire wire) {
michael@0:         this(in, wire, null);
michael@0:     }
michael@0: 
michael@0:     public boolean isDataAvailable(int timeout) throws IOException {
michael@0:         return this.in.isDataAvailable(timeout);
michael@0:     }
michael@0: 
michael@0:     public int read(byte[] b, int off, int len) throws IOException {
michael@0:         int l = this.in.read(b,  off,  len);
michael@0:         if (this.wire.enabled() && l > 0) {
michael@0:             this.wire.input(b, off, l);
michael@0:         }
michael@0:         return l;
michael@0:     }
michael@0: 
michael@0:     public int read() throws IOException {
michael@0:         int l = this.in.read();
michael@0:         if (this.wire.enabled() && l != -1) {
michael@0:             this.wire.input(l);
michael@0:         }
michael@0:         return l;
michael@0:     }
michael@0: 
michael@0:     public int read(byte[] b) throws IOException {
michael@0:         int l = this.in.read(b);
michael@0:         if (this.wire.enabled() && l > 0) {
michael@0:             this.wire.input(b, 0, l);
michael@0:         }
michael@0:         return l;
michael@0:     }
michael@0: 
michael@0:     public String readLine() throws IOException {
michael@0:         String s = this.in.readLine();
michael@0:         if (this.wire.enabled() && s != null) {
michael@0:             String tmp = s + "\r\n";
michael@0:             this.wire.input(tmp.getBytes(this.charset));
michael@0:         }
michael@0:         return s;
michael@0:     }
michael@0: 
michael@0:     public int readLine(final CharArrayBuffer buffer) throws IOException {
michael@0:         int l = this.in.readLine(buffer);
michael@0:         if (this.wire.enabled() && l >= 0) {
michael@0:             int pos = buffer.length() - l;
michael@0:             String s = new String(buffer.buffer(), pos, l);
michael@0:             String tmp = s + "\r\n";
michael@0:             this.wire.input(tmp.getBytes(this.charset));
michael@0:         }
michael@0:         return l;
michael@0:     }
michael@0: 
michael@0:     public HttpTransportMetrics getMetrics() {
michael@0:         return this.in.getMetrics();
michael@0:     }
michael@0: 
michael@0:     public boolean isEof() {
michael@0:         if (this.eofSensor != null) {
michael@0:             return this.eofSensor.isEof();
michael@0:         } else {
michael@0:             return false;
michael@0:         }
michael@0:     }
michael@0: 
michael@0: }