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/*
* 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.
*/
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;
@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 ioe) {
ssiMediator.log(sm.getString("ssiFsize.noSize", substitutedValue), ioe);
writer.write(configErrMsg);
}
}
return lastModified;
}
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.
private 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;
}
}
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