/*
* 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.coyote;
import org.apache.tomcat.util.res.StringManager;
/**
* Defines timing options for responding to requests that contain a ' 100 - continue ' expectations .
*/
public enum ContinueResponseTiming {
/**
* Tomcat will automatically send the 100 intermediate response before sending the request to the servlet .
*/
IMMEDIATELY("immediately" ),
/**
* Send the 100 intermediate response only when the servlet attempts to read the request ' s body by either :
* < ul >
* < li > calling read on the InputStream returned by HttpServletRequest . getInputStream < / li >
* < li > calling read on the BufferedReader returned by HttpServletRequest . getReader < / li >
* < / ul >
* This allows the servlet to process the request headers and possibly respond before reading the request body .
*/
ON_REQUEST_BODY_READ("onRead" ),
/**
* Internal use only . Used to indicate that the 100 intermediate response should be sent if possible regardless of
* the current configuration .
*/
ALWAYS("always" );
private static final StringManager sm = StringManager.getManager(ContinueResponseTiming.class );
public static ContinueResponseTiming fromString(String value) {
/*
* Do this for two reasons : - Not all of the Enum values are intended to be used in configuration - the naming
* convention for Enum constants and configuration values - is not consistent
*/
if (IMMEDIATELY.toString().equalsIgnoreCase(value)) {
return IMMEDIATELY;
} else if (ON_REQUEST_BODY_READ.toString().equalsIgnoreCase(value)) {
return ON_REQUEST_BODY_READ;
} else {
throw new IllegalArgumentException(sm.getString("continueResponseTiming.invalid" , value));
}
}
private final String configValue;
ContinueResponseTiming(String configValue) {
this .configValue = configValue;
}
@Override
public String toString() {
return configValue;
}
}
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