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package org.apache.catalina.ssi;
import org.glassfish.web.util.HtmlEntityEncoder;
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 $Revision: 1.4 $, $Date: 2007/05/05 05:32:20 $
*/
public final class SSIFsize implements SSICommand {
private final static int ONE_KILOBYTE = 1024;
private 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 = null;
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);
if (configErrMsg == null) {
configErrMsg = getEncodedConfigErrorMessage(ssiMediator);
}
writer.write(configErrMsg);
}
} catch (IOException e) {
ssiMediator.log("#fsize--Couldn't get size for file: "
+ substitutedValue, e);
if (configErrMsg == null) {
configErrMsg = getEncodedConfigErrorMessage(ssiMediator);
}
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 = "-1k";
} 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;
}
private String getEncodedConfigErrorMessage(SSIMediator ssiMediator) {
String errorMessage = ssiMediator.getConfigErrMsg();
return HtmlEntityEncoder.encodeXSS(errorMessage);
}
}