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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.knox.gateway.trace; import org.apache.logging.log4j.LogManager; import org.apache.logging.log4j.Logger; import javax.servlet.ServletInputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletRequestWrapper; import java.io.IOException; import java.util.Enumeration; import java.util.Locale; class TraceRequest extends HttpServletRequestWrapper { private static final Logger log = LogManager.getLogger( TraceHandler.HTTP_REQUEST_LOGGER ); private static final Logger headLog = LogManager.getLogger( TraceHandler.HTTP_REQUEST_HEADER_LOGGER ); private ServletInputStream input; TraceRequest( HttpServletRequest request ) { super( request ); if( log.isTraceEnabled() ) { traceRequestDetails(); } } @Override public synchronized ServletInputStream getInputStream() throws IOException { if( log.isTraceEnabled() ) { if( input == null ) { input = new TraceInput( super.getInputStream() ); } return input; } else { return super.getInputStream(); } } private void traceRequestDetails() { StringBuilder sb = new StringBuilder(); TraceUtil.appendCorrelationContext( sb ); sb.append("|Request=") .append(getMethod()) .append(' ') .append(getRequestURI()); String qs = getQueryString(); if( qs != null ) { sb.append('?').append(qs); } appendHeaders(sb); log.trace(sb.toString()); } private void appendHeaders( StringBuilder sb ) { if( headLog.isTraceEnabled() ) { Enumeration names = getHeaderNames(); while( names.hasMoreElements() ) { String name = names.nextElement(); Enumeration values = getHeaders( name ); while( values.hasMoreElements() ) { String value = values.nextElement(); sb.append( String.format(Locale.ROOT, "%n\tHeader[%s]=%s", name, value ) ); } } } } }





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