/*
* 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;
import org.apache.tomcat.util.res.StringManager;
/**
* Implements the Server-side #fsize command
*
* @author Bip Thelin
* @author Paul Speed
* @author Dan Sandberg
* @author David Becker
*/
public final class SSIFsize
implements SSICommand {
private static final StringManager sm = StringManager.getManager(SSIFsize.
class);
static final int ONE_KIBIBYTE = 1024;
static final int ONE_MEBIBYTE = 1024 * 1024;
/**
* @see SSICommand
*/
@Override
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(sm.getString(
"ssiCommand.invalidAttribute", paramName));
writer.write(configErrMsg);
}
}
catch (IOException e) {
ssiMediator.log(sm.getString(
"ssiFsize.noSize", substitutedValue), e);
writer.write(configErrMsg);
}
}
return lastModified;
}
public String repeat(
char aChar,
int numChars) {
if (numChars < 0) {
throw new IllegalArgumentException(sm.getString(
"ssiFsize.invalidNumChars"));
}
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 httpd here, as we do everywhere.
// All the 'magic' numbers are from the util_script.c httpd source file.
// Should use KiB and MiB in output but use k and M for consistency with httpd.
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 =
"-";
}
else if (size == 0) {
retString =
"0k";
}
else if (size < ONE_KIBIBYTE) {
retString =
"1k";
}
else if (size < ONE_MEBIBYTE) {
retString =
Long.toString((size + 512) / ONE_KIBIBYTE);
retString +=
"k";
}
else if (size < 99 * ONE_MEBIBYTE) {
DecimalFormat decimalFormat =
new DecimalFormat(
"0.0M");
retString = decimalFormat.format(size / (
double)ONE_MEBIBYTE);
}
else {
retString =
Long.toString((size + (529 * ONE_KIBIBYTE))
/ ONE_MEBIBYTE);
retString +=
"M";
}
retString = padLeft(retString, 5);
}
return retString;
}
}