org.apache.catalina.ssi.SSIFsize Maven / Gradle / Ivy
/*
* 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.catalina.ssi;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.DecimalFormat;
/**
* Implements the Server-side #fsize command
*
* @author Bip Thelin
* @author Paul Speed
* @author Dan Sandberg
* @author David Becker
* @version $Id: SSIFsize.java 939305 2010-04-29 13:43:39Z kkolinko $
*/
public final class SSIFsize implements SSICommand {
protected final static int ONE_KILOBYTE = 1024;
protected final static int ONE_MEGABYTE = 1024 * 1024;
/**
* @see SSICommand
*/
public long process(SSIMediator ssiMediator, String commandName,
String[] paramNames, String[] paramValues, PrintWriter writer) {
long lastModified = 0;
String configErrMsg = ssiMediator.getConfigErrMsg();
for (int i = 0; i < paramNames.length; i++) {
String paramName = paramNames[i];
String paramValue = paramValues[i];
String substitutedValue = ssiMediator
.substituteVariables(paramValue);
try {
if (paramName.equalsIgnoreCase("file")
|| paramName.equalsIgnoreCase("virtual")) {
boolean virtual = paramName.equalsIgnoreCase("virtual");
lastModified = ssiMediator.getFileLastModified(
substitutedValue, virtual);
long size = ssiMediator.getFileSize(substitutedValue,
virtual);
String configSizeFmt = ssiMediator.getConfigSizeFmt();
writer.write(formatSize(size, configSizeFmt));
} else {
ssiMediator.log("#fsize--Invalid attribute: " + paramName);
writer.write(configErrMsg);
}
} catch (IOException e) {
ssiMediator.log("#fsize--Couldn't get size for file: "
+ substitutedValue, e);
writer.write(configErrMsg);
}
}
return lastModified;
}
public String repeat(char aChar, int numChars) {
if (numChars < 0) {
throw new IllegalArgumentException("Num chars can't be negative");
}
StringBuilder buf = new StringBuilder();
for (int i = 0; i < numChars; i++) {
buf.append(aChar);
}
return buf.toString();
}
public String padLeft(String str, int maxChars) {
String result = str;
int charsToAdd = maxChars - str.length();
if (charsToAdd > 0) {
result = repeat(' ', charsToAdd) + str;
}
return result;
}
//We try to mimic Apache here, as we do everywhere
//All the 'magic' numbers are from the util_script.c Apache source file.
protected String formatSize(long size, String format) {
String retString = "";
if (format.equalsIgnoreCase("bytes")) {
DecimalFormat decimalFormat = new DecimalFormat("#,##0");
retString = decimalFormat.format(size);
} else {
if (size == 0) {
retString = "0k";
} else if (size < ONE_KILOBYTE) {
retString = "1k";
} else if (size < ONE_MEGABYTE) {
retString = Long.toString((size + 512) / ONE_KILOBYTE);
retString += "k";
} else if (size < 99 * ONE_MEGABYTE) {
DecimalFormat decimalFormat = new DecimalFormat("0.0M");
retString = decimalFormat.format(size / (double)ONE_MEGABYTE);
} else {
retString = Long.toString((size + (529 * ONE_KILOBYTE))
/ ONE_MEGABYTE);
retString += "M";
}
retString = padLeft(retString, 5);
}
return retString;
}
}