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 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
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 * 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
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 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
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package io.undertow.attribute;

import io.undertow.server.HttpServerExchange;

The bytes sent
Author:Filipe Ferraz
/** * The bytes sent * * @author Filipe Ferraz */
public class BytesSentAttribute implements ExchangeAttribute { public static final String BYTES_SENT_SHORT_UPPER = "%B"; public static final String BYTES_SENT_SHORT_LOWER = "%b"; public static final String BYTES_SENT = "%{BYTES_SENT}"; private final boolean dashIfZero; public BytesSentAttribute(boolean dashIfZero) { this.dashIfZero = dashIfZero; } @Override public String readAttribute(final HttpServerExchange exchange) { if (dashIfZero ) { long bytesSent = exchange.getResponseBytesSent(); return bytesSent == 0 ? "-" : Long.toString(bytesSent); } else { return Long.toString(exchange.getResponseBytesSent()); } } @Override public void writeAttribute(final HttpServerExchange exchange, final String newValue) throws ReadOnlyAttributeException { throw new ReadOnlyAttributeException("Bytes sent", newValue); } public static final class Builder implements ExchangeAttributeBuilder { @Override public String name() { return "Bytes Sent"; } @Override public ExchangeAttribute build(final String token) { if(token.equals(BYTES_SENT_SHORT_LOWER)) { return new BytesSentAttribute(true); } if (token.equals(BYTES_SENT) || token.equals(BYTES_SENT_SHORT_UPPER)) { return new BytesSentAttribute(false); } return null; } @Override public int priority() { return 0; } } }