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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.logging;
import com.yahoo.component.AbstractComponent;
import com.yahoo.container.core.AccessLogConfig;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;
/**
* @author Bjorn Borud
* @author Oyvind Bakksjo
*/
public final class VespaAccessLog extends AbstractComponent implements RequestLogHandler, LogWriter<RequestLogEntry> {
private static final ThreadLocal<SimpleDateFormat> dateFormat = ThreadLocal.withInitial(VespaAccessLog::createDateFormat);
private final AccessLogHandler logHandler;
public VespaAccessLog(AccessLogConfig config) {
logHandler = new AccessLogHandler(config.fileHandler(), this);
}
private static SimpleDateFormat createDateFormat() {
SimpleDateFormat format = new SimpleDateFormat("[dd/MMM/yyyy:HH:mm:ss Z]");
format.setTimeZone(TimeZone.getTimeZone("UTC"));
return format;
}
private static String getDate() {
return dateFormat.get().format(new Date());
}
private String getRequest(final String httpMethod, final String rawPath, final String rawQuery, final String httpVersion) {
return httpMethod + " " + (rawQuery != null ? rawPath + "?" + rawQuery : rawPath) + " " + httpVersion;
}
private String getUser(String user) {
return (user == null) ? "-" : user;
}
private String toLogline(String ipAddr, String user, String request, String referer, String agent,
long durationMillis, long byteCount, HitCounts hitcounts, int returnCode)
{
long ms = Math.max(0L, durationMillis);
StringBuilder sb = new StringBuilder()
.append(ipAddr)
.append(" - ")
.append(getUser(user))
.append(' ')
.append(getDate())
.append(" \"")
.append(request)
.append("\" ")
.append(returnCode)
.append(' ')
.append(byteCount)
.append(" \"")
.append(referer)
.append("\" \"")
.append(agent)
.append("\" ")
.append(ms/1000)
.append('.');
decimalsOfSecondsFromMilliseconds(ms, sb);
sb.append(' ')
.append((hitcounts == null) ? 0 : hitcounts.getTotalHitCount())
.append(" 0.0 ")
.append((hitcounts == null) ? 0 : hitcounts.getSummaryCount());
return sb.toString();
}
private void decimalsOfSecondsFromMilliseconds(long ms, StringBuilder sb) {
long dec = ms % 1000;
String numbers = String.valueOf(dec);
if (dec <= 9) {
sb.append("00");
} else if (dec <= 99) {
sb.append('0');
}
sb.append(numbers);
}
@Override public void deconstruct() { logHandler.shutdown(); }
@Override
public void log(RequestLogEntry entry) {
logHandler.log(entry);
}
@Override
public void write(RequestLogEntry entry, OutputStream outputStream) throws IOException {
outputStream.write(
toLogline(
entry.peerAddress().get(),
null,
getRequest(
entry.httpMethod().orElse(null),
entry.rawPath().orElse(null),
entry.rawQuery().orElse(null),
entry.httpVersion().orElse(null)),
entry.referer().orElse(null),
entry.userAgent().orElse(null),
entry.duration().get().toMillis(),
entry.responseSize().orElse(0L),
entry.hitCounts().orElse(null),
entry.statusCode().orElse(0)).getBytes(StandardCharsets.UTF_8));
}
}
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