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// Portions Copyright [2019-2021] Payara Foundation and/or affiliates

package org.apache.catalina.valves;


import org.apache.catalina.*;

import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.Cookie;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;
import java.util.logging.Level;

/**
 * 

Implementation of the Valve interface that generates a web server * access log with the detailed line contents matching a configurable pattern. * The syntax of the available patterns is similar to that supported by the * Apache mod_log_config module. As an additional feature, * automatic rollover of log files when the date changes is also supported.

* *

Patterns for the logged message may include constant text or any of the * following replacement strings, for which the corresponding information * from the specified Response is substituted:

*
    *
  • %a - Remote IP address *
  • %A - Local IP address *
  • %b - Bytes sent, excluding HTTP headers, or '-' if no bytes * were sent *
  • %B - Bytes sent, excluding HTTP headers *
  • %h - Remote host name *
  • %H - Request protocol *
  • %l - Remote logical username from identd (always returns '-') *
  • %m - Request method *
  • %p - Local port *
  • %q - Query string (prepended with a '?' if it exists, otherwise * an empty string *
  • %r - First line of the request *
  • %s - HTTP status code of the response *
  • %S - User session ID *
  • %t - Date and time, in Common Log Format format *
  • %u - Remote user that was authenticated *
  • %U - Requested URL path *
  • %v - Local server name *
  • %D - Time taken to process the request, in millis *
  • %T - Time taken to process the request, in seconds *
*

In addition, the caller can specify one of the following aliases for * commonly utilized patterns:

*
    *
  • common - %h %l %u %t "%r" %s %b *
  • combined - * %h %l %u %t "%r" %s %b "%{Referer}i" "%{User-Agent}i" *
* *

* There is also support to write information from the cookie, incoming * header, the Session or something else in the ServletRequest.
* It is modeled after the apache syntax: *

    *
  • %{xxx}i for incoming headers *
  • %{xxx}c for a specific cookie *
  • %{xxx}r xxx is an attribute in the ServletRequest *
  • %{xxx}s xxx is an attribute in the HttpSession *
*

* *

* Conditional logging is also supported. This can be done with the * condition property. * If the value returned from ServletRequest.getAttribute(condition) * yields a non-null value. The logging will be skipped. *

* * @author Craig R. McClanahan * @author Jason Brittain * @version $Revision: 1.4 $ $Date: 2006/10/23 23:18:02 $ */ public final class AccessLogValve /** CR 6411114 (Lifecycle implementation moved to ValveBase) extends ValveBase implements Lifecycle { */ // START CR 6411114 extends ValveBase { // END CR 6411114 // ----------------------------------------------------------- Constructors /** * Construct a new instance of this class with default property values. */ public AccessLogValve() { super(); setPattern("common"); } // ----------------------------------------------------- Instance Variables /** * The as-of date for the currently open log file, or a zero-length * string if there is no open log file. */ private String dateStamp = ""; /** * The directory in which log files are created. */ private String directory = "logs"; /** * The descriptive information about this implementation. */ private static final String info = "org.apache.catalina.valves.AccessLogValve/1.0"; /** * The lifecycle event support for this component. */ /** CR 6411114 (Lifecycle implementation moved to ValveBase) protected LifecycleSupport lifecycle = new LifecycleSupport(this); */ private static final String REQUEST_START_TIME_NOTE = "org.apache.catalina.valves.AccessLogValve.requestStartTime"; /** * The set of month abbreviations for log messages. */ private static final String months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; /** * If the current log pattern is the same as the common access log * format pattern, then we'll set this variable to true and log in * a more optimal and hard-coded way. */ private boolean common = false; /** * For the combined format (common, plus useragent and referer), we do * the same */ private boolean combined = false; /** * The pattern used to format our access log lines. */ private String pattern = null; /** * The prefix that is added to log file filenames. */ private String prefix = "access_log."; /** * Should we rotate our log file? Default is true (like old behavior) */ private boolean rotatable = true; /** * Has this component been started yet? */ /** CR 6411114 (Lifecycle implementation moved to ValveBase) private boolean started = false; */ /** * The suffix that is added to log file filenames. */ private String suffix = ""; /** * The PrintWriter to which we are currently logging, if any. */ private PrintWriter writer = null; /** * ThreadLocal for a date formatter to format a Date into a date in the format * "yyyy-MM-dd". */ private volatile ThreadLocal dateFormatter = null; private static final TimeZone DEFAULT_TIME_ZONE = TimeZone.getDefault(); /** * ThreadLocal for a date formatter to format Dates into a day string in the format * "dd". */ private static final ThreadLocal dayFormatter = new ThreadLocal() { @Override protected SimpleDateFormat initialValue() { SimpleDateFormat f = new SimpleDateFormat("dd"); f.setTimeZone(DEFAULT_TIME_ZONE); return f; } }; /** * ThreadLocal for a date formatter to format a Date into a month string in the format * "MM". */ private static final ThreadLocal monthFormatter = new ThreadLocal() { @Override protected SimpleDateFormat initialValue() { SimpleDateFormat f = new SimpleDateFormat("MM"); f.setTimeZone(DEFAULT_TIME_ZONE); return f; } }; /** * ThreadLocal for a time taken formatter for 3 decimal places. */ private static final ThreadLocal timeTakenFormatter = new ThreadLocal() { @Override protected DecimalFormat initialValue() { return new DecimalFormat("0.000"); } }; /** * ThreadLocal for a date formatter to format a Date into a year string in the format * "yyyy". */ private ThreadLocal yearFormatter = new ThreadLocal() { @Override protected SimpleDateFormat initialValue() { SimpleDateFormat f = new SimpleDateFormat("yyyy"); f.setTimeZone(DEFAULT_TIME_ZONE); return f; } }; /** * ThreadLocal for a date formatter to format a Date into a time in the format * "kk:mm:ss" (kk is a 24-hour representation of the hour). */ private final ThreadLocal timeFormatter = new ThreadLocal() { @Override protected SimpleDateFormat initialValue() { SimpleDateFormat f = new SimpleDateFormat("HH:mm:ss"); f.setTimeZone(DEFAULT_TIME_ZONE); return f; } }; /** * The time zone relative to GMT. */ private String timeZone = null; /** * The system time when we last updated the Date that this valve * uses for log lines. */ private Date currentDate = null; /** * When formatting log lines, we often use strings like this one (" "). */ private final String space = " "; /** * Resolve hosts. */ private boolean resolveHosts = false; /** * Instant when the log daily rotation was last checked. */ private volatile long rotationLastChecked = 0L; /** * Are we doing conditional logging. default false. */ private String condition = null; /** * Date format to place in log file name. Use at your own risk! */ private String fileDateFormat = null; // ------------------------------------------------------------- Properties /** * Return the directory in which we create log files. */ public String getDirectory() { return (directory); } /** * Set the directory in which we create log files. * * @param directory The new log file directory */ public void setDirectory(String directory) { this.directory = directory; } /** * Return descriptive information about this implementation. */ @Override public String getInfo() { return (this.info); } /** * Return the format pattern. */ public String getPattern() { return (this.pattern); } /** * Set the format pattern, first translating any recognized alias. * * @param pattern The new pattern */ public void setPattern(String pattern) { if (pattern == null) pattern = ""; if (pattern.equals(Constants.AccessLog.COMMON_ALIAS)) pattern = Constants.AccessLog.COMMON_PATTERN; if (pattern.equals(Constants.AccessLog.COMBINED_ALIAS)) pattern = Constants.AccessLog.COMBINED_PATTERN; this.pattern = pattern; common = this.pattern.equals(Constants.AccessLog.COMMON_PATTERN); combined = this.pattern.equals(Constants.AccessLog.COMBINED_PATTERN); } /** * Return the log file prefix. */ public String getPrefix() { return (prefix); } /** * Set the log file prefix. * * @param prefix The new log file prefix */ public void setPrefix(String prefix) { this.prefix = prefix; } /** * Should we rotate the logs */ public boolean isRotatable() { return rotatable; } /** * Set the value is we should we rotate the logs * * @param rotatable true is we should rotate. */ public void setRotatable(boolean rotatable) { this.rotatable = rotatable; } /** * Return the log file suffix. */ public String getSuffix() { return (suffix); } /** * Set the log file suffix. * * @param suffix The new log file suffix */ public void setSuffix(String suffix) { this.suffix = suffix; } /** * Set the resolve hosts flag. * * @param resolveHosts The new resolve hosts value */ public void setResolveHosts(boolean resolveHosts) { this.resolveHosts = resolveHosts; } /** * Get the value of the resolve hosts flag. */ public boolean isResolveHosts() { return resolveHosts; } /** * Return whether the attribute name to look for when * performing conditional logging. If null, every * request is logged. */ public String getCondition() { return condition; } /** * Set the ServletRequest.attribute to look for to perform * conditional logging. Set to null to log everything. * * @param condition Set to null to log everything */ public void setCondition(String condition) { this.condition = condition; } /** * Return the date format date based log rotation. */ public String getFileDateFormat() { return fileDateFormat; } /** * Set the date format date based log rotation. */ public void setFileDateFormat(String fileDateFormat) { this.fileDateFormat = fileDateFormat; } // --------------------------------------------------------- Public Methods /** * Log a message summarizing the specified request and response, according * to the format specified by the pattern property. * * @param request Request being processed * @param response Response being processed * * @exception IOException if an input/output error has occurred * @exception ServletException if a servlet error has occurred */ @Override public int invoke(Request request, Response response)throws IOException, ServletException { // Pass this request on to the next valve in our pipeline request.setNote(REQUEST_START_TIME_NOTE, System.currentTimeMillis()); return INVOKE_NEXT; } @Override public void postInvoke(Request request, Response response){ long t2 = System.currentTimeMillis(); Object startTimeObj = request.getNote(REQUEST_START_TIME_NOTE); if (!(startTimeObj instanceof Long)) { // should not happen return; } long time = t2 - ((Long)startTimeObj); if (condition!=null && null!=request.getRequest().getAttribute(condition)) { return; } Date date = getDate(); StringBuilder result = new StringBuilder(); // Check to see if we should log using the "common" access log pattern if (common || combined) { String value = null; ServletRequest req = request.getRequest(); HttpServletRequest hreq = (HttpServletRequest) req; if (isResolveHosts()) result.append(req.getRemoteHost()); else result.append(req.getRemoteAddr()); result.append(" - "); value = hreq.getRemoteUser(); if (value == null) result.append("- "); else { result.append(value); result.append(space); } result.append("["); result.append(dayFormatter.get().format(date)); // Day result.append('/'); result.append(lookup(monthFormatter.get().format(date))); // Month result.append('/'); result.append(yearFormatter.get().format(date)); // Year result.append(':'); result.append(timeFormatter.get().format(date)); // Time result.append(space); result.append(timeZone); // Time Zone result.append("] \""); result.append(hreq.getMethod()); result.append(space); result.append(hreq.getRequestURI()); if (hreq.getQueryString() != null) { result.append('?'); result.append(hreq.getQueryString()); } result.append(space); result.append(hreq.getProtocol()); result.append("\" "); result.append(((HttpResponse) response).getStatus()); result.append(space); int length = response.getContentCount(); if (length <= 0) value = "-"; else value = "" + length; result.append(value); if (combined) { result.append(space); result.append("\""); String referer = hreq.getHeader("referer"); if(referer != null) result.append(referer); else result.append("-"); result.append("\""); result.append(space); result.append("\""); String ua = hreq.getHeader("user-agent"); if(ua != null) result.append(ua); else result.append("-"); result.append("\""); } } else { // Generate a message based on the defined pattern boolean replace = false; for (int i = 0; i < pattern.length(); i++) { char ch = pattern.charAt(i); if (replace) { /* For code that processes {, the behavior will be ... if I * do not encounter a closing } - then I ignore the { */ if ('{' == ch){ StringBuilder name = new StringBuilder(); int j = i + 1; for(;j < pattern.length() && '}' != pattern.charAt(j); j++) { name.append(pattern.charAt(j)); } if (j+1 < pattern.length()) { /* the +1 was to account for } which we increment now */ j++; result.append(replace(name.toString(), pattern.charAt(j), request, response)); i=j; /*Since we walked more than one character*/ } else { //D'oh - end of string - pretend we never did this //and do processing the "old way" result.append(replace(ch, date, request, response, time)); } } else { result.append(replace(ch, date, request, response,time )); } replace = false; } else if (ch == '%') { replace = true; } else { result.append(ch); } } } log(result.toString(), date); } // -------------------------------------------------------- Private Methods /** * Close the currently open log file (if any) */ private synchronized void close() { if (writer == null) return; writer.flush(); writer.close(); writer = null; dateStamp = ""; } /** * Log the specified message to the log file, switching files if the date * has changed since the previous log call. * * @param message Message to be logged * @param date the current Date object (so this method doesn't need to * create a new one) */ public void log(String message, Date date) { if (rotatable){ // Only do a logfile switch check once a second, max. long systime = System.currentTimeMillis(); if ((systime - rotationLastChecked) > 1000) { // We need a new currentDate currentDate = new Date(systime); rotationLastChecked = systime; // Check for a change of date String tsDate = dateFormatter.get().format(currentDate); // If the date has changed, switch log files if (!dateStamp.equals(tsDate)) { synchronized (this) { if (!dateStamp.equals(tsDate)) { close(); dateStamp = tsDate; open(); } } } } } // Log this message if (writer != null) { writer.println(message); } } /** * Return the month abbreviation for the specified month, which must * be a two-digit String. * * @param month Month number ("01" .. "12"). */ private String lookup(String month) { int index; try { index = Integer.parseInt(month) - 1; } catch (Throwable t) { index = 0; // Can not happen, in theory } return (months[index]); } /** * Open the new log file for the date specified by dateStamp. */ private synchronized void open() { // Create the directory if necessary File dir = new File(directory); if (!dir.isAbsolute()) dir = new File(System.getProperty("catalina.base"), directory); if (!dir.mkdirs() && !dir.isDirectory()) { log.log(Level.SEVERE, LogFacade.CREATING_DIR_EXCEPTION, dir); } // Open the current log file try { String pathname; // If no rotate - no need for dateStamp in fileName if (rotatable){ pathname = dir.getAbsolutePath() + File.separator + prefix + dateStamp + suffix; } else { pathname = dir.getAbsolutePath() + File.separator + prefix + suffix; } writer = new PrintWriter(new FileWriter(pathname, true), true); } catch (IOException e) { writer = null; } } /** * Return the replacement text for the specified pattern character. * * @param pattern Pattern character identifying the desired text * @param date the current Date so that this method doesn't need to * create one * @param request Request being processed * @param response Response being processed */ private String replace(char pattern, Date date, Request request, Response response, long time) { String value = null; ServletRequest req = request.getRequest(); HttpServletRequest hreq = (HttpServletRequest) req; ServletResponse res = response.getResponse(); HttpServletResponse hres = (HttpServletResponse) res; switch (pattern) { case 'a': value = req.getRemoteAddr(); break; case 'A': try { value = InetAddress.getLocalHost().getHostAddress(); } catch(Throwable e){ value = "127.0.0.1"; } break; case 'b': int length = response.getContentCount(); if (length <= 0) value = "-"; else value = "" + length; break; case 'B': value = "" + response.getContentLength(); break; case 'h': value = req.getRemoteHost(); break; case 'H': value = req.getProtocol(); break; case 'l': value = "-"; break; case 'm': if (hreq != null) value = hreq.getMethod(); else value = ""; break; case 'p': value = "" + req.getServerPort(); break; case 'D': value = "" + time; break; case 'q': String query = null; if (hreq != null) query = hreq.getQueryString(); if (query != null) value = "?" + query; else value = ""; break; case 'r': if (hreq != null) { StringBuilder sb = new StringBuilder(); sb.append(hreq.getMethod()); sb.append(space); sb.append(hreq.getRequestURI()); if (hreq.getQueryString() != null) { sb.append('?'); sb.append(hreq.getQueryString()); } sb.append(space); sb.append(hreq.getProtocol()); value = sb.toString(); } else { value = "- - -"; } break; case 'S': if (request instanceof org.apache.catalina.connector.Request) { Session sess = ((org.apache.catalina.connector.Request) request).getSessionInternal(false); if (sess != null) { value = sess.getIdInternal(); } else { value = "-"; } } else { if (hreq != null) if (hreq.getSession(false) != null) value = hreq.getSession(false).getId(); else value = "-"; else value = "-"; } break; case 's': if (hres != null) value = "" + ((HttpResponse) response).getStatus(); else value = "-"; break; case 't': StringBuilder temp = new StringBuilder("["); temp.append(dayFormatter.get().format(date)); // Day temp.append('/'); temp.append(lookup(monthFormatter.get().format(date))); // Month temp.append('/'); temp.append(yearFormatter.get().format(date)); // Year temp.append(':'); temp.append(timeFormatter.get().format(date)); // Time temp.append(' '); temp.append(timeZone); // Timezone temp.append(']'); value = temp.toString(); break; case 'T': value = timeTakenFormatter.get().format(time/1000d); break; case 'u': if (hreq != null) value = hreq.getRemoteUser(); if (value == null) value = "-"; break; case 'U': if (hreq != null) value = hreq.getRequestURI(); else value = "-"; break; case 'v': value = req.getServerName(); break; default: value = "???" + pattern + "???"; break; } if (value == null) return (""); else return (value); } /** * Return the replacement text for the specified "header/parameter". * * @param header The header/parameter to get * @param type Where to get it from i=input,c=cookie,r=ServletRequest,s=Session * @param request Request being processed * @param response Response being processed */ private String replace(String header, char type, Request request, Response response) { Object value = null; ServletRequest req = request.getRequest(); HttpServletRequest hreq = (HttpServletRequest) req; switch (type) { case 'i': if (null != hreq) value = hreq.getHeader(header); else value= "??"; break; /* // Someone please make me work case 'o': break; */ case 'c': Cookie[] c = hreq.getCookies(); for (int i=0; c != null && i < c.length; i++){ if (header.equals(c[i].getName())){ value = c[i].getValue(); break; } } break; case 'r': if (null != hreq) value = hreq.getAttribute(header); else value= "??"; break; case 's': if (null != hreq) { HttpSession sess = hreq.getSession(false); if (null != sess) value = sess.getAttribute(header); } break; default: value = "???"; } /* try catch in case toString() barfs */ try { if (value!=null) if (value instanceof String) return (String)value; else return value.toString(); else return "-"; } catch(Throwable e) { return "-"; } } /** * This method returns a Date object that is accurate to within one * second. If a thread calls this method to get a Date and it's been * less than 1 second since a new Date was created, this method * simply gives out the same Date again so that the system doesn't * spend time creating Date objects unnecessarily. */ private Date getDate() { // Only create a new Date once per second, max. long systime = System.currentTimeMillis(); if ((systime - currentDate.getTime()) > 1000) { currentDate = new Date(systime); } return currentDate; } private String calculateTimeZoneOffset(long offset) { StringBuilder tz = new StringBuilder(); if ((offset<0)) { tz.append("-"); offset = -offset; } else { tz.append("+"); } long hourOffset = offset/(1000*60*60); long minuteOffset = (offset/(1000*60)) % 60; if (hourOffset<10) tz.append("0"); tz.append(hourOffset); if (minuteOffset<10) tz.append("0"); tz.append(minuteOffset); return tz.toString(); } // ------------------------------------------------------ Lifecycle Methods /** * Add a lifecycle event listener to this component. * * @param listener The listener to add */ /** CR 6411114 (Lifecycle implementation moved to ValveBase) public void addLifecycleListener(LifecycleListener listener) { lifecycle.addLifecycleListener(listener); } */ /** * Get the lifecycle listeners associated with this lifecycle. If this * Lifecycle has no listeners registered, a zero-length array is returned. */ /** CR 6411114 (Lifecycle implementation moved to ValveBase) public LifecycleListener[] findLifecycleListeners() { return lifecycle.findLifecycleListeners(); } */ /** * Remove a lifecycle event listener from this component. * * @param listener The listener to add */ /** CR 6411114 (Lifecycle implementation moved to ValveBase) public void removeLifecycleListener(LifecycleListener listener) { lifecycle.removeLifecycleListener(listener); } */ /** * Prepare for the beginning of active use of the public methods of this * component. This method should be called after configure(), * and before any of the public methods of the component are utilized. * * @exception LifecycleException if this component detects a fatal error * that prevents this component from being used */ @Override public void start() throws LifecycleException { // START CR 6411114 if (started) // Ignore multiple starts return; super.start(); // END CR 6411114 // Initialize the timeZone, Date formatters, and currentDate timeZone = calculateTimeZoneOffset(DEFAULT_TIME_ZONE.getRawOffset()); if (fileDateFormat==null || fileDateFormat.length()==0) fileDateFormat = "yyyy-MM-dd"; dateFormatter = new ThreadLocal() { @Override protected SimpleDateFormat initialValue() { SimpleDateFormat f = new SimpleDateFormat(fileDateFormat); f.setTimeZone(DEFAULT_TIME_ZONE); return f; } }; currentDate = new Date(); dateStamp = dateFormatter.get().format(currentDate); open(); } /** * Gracefully terminate the active use of the public methods of this * component. This method should be the last one called on a given * instance of this component. * * @exception LifecycleException if this component detects a fatal error * that needs to be reported */ @Override public void stop() throws LifecycleException { // START CR 6411114 if (!started) // Ignore stop if not started return; // END CR 6411114 close(); // START CR 6411114 super.stop(); // END CR 6411114 } }




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