Quelle ContinueResponseTiming.java Sprache: JAVA

/*
*  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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