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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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */
package org.apache.hc.core5.http.impl;

import org.apache.hc.core5.http.protocol.HttpProcessor;
import org.apache.hc.core5.http.protocol.HttpProcessorBuilder;
import org.apache.hc.core5.http.protocol.RequestConnControl;
import org.apache.hc.core5.http.protocol.RequestContent;
import org.apache.hc.core5.http.protocol.RequestExpectContinue;
import org.apache.hc.core5.http.protocol.RequestTargetHost;
import org.apache.hc.core5.http.protocol.RequestUserAgent;
import org.apache.hc.core5.http.protocol.RequestValidateHost;
import org.apache.hc.core5.http.protocol.ResponseConnControl;
import org.apache.hc.core5.http.protocol.ResponseContent;
import org.apache.hc.core5.http.protocol.ResponseDate;
import org.apache.hc.core5.http.protocol.ResponseServer;
import org.apache.hc.core5.util.TextUtils;
import org.apache.hc.core5.util.VersionInfo;

/**
 * Factory class for standard {@link HttpProcessor} instances.
 *
 * @since 5.0
 */
public final class HttpProcessors {

    private final static String SOFTWARE = "Apache-HttpCore";

    /**
     * Creates {@link HttpProcessorBuilder} initialized with default protocol interceptors
     * for server side HTTP/1.1 processing.
     *
     * @param serverInfo the server info text or {@code null} for default.
     * @return the processor builder.
     */
    public static HttpProcessorBuilder customServer(final String serverInfo) {
        return HttpProcessorBuilder.create()
                .addAll(
                        new ResponseDate(),
                        new ResponseServer(!TextUtils.isBlank(serverInfo) ? serverInfo :
                                VersionInfo.getSoftwareInfo(SOFTWARE, "org.apache.hc.core5", HttpProcessors.class)),
                        new ResponseContent(),
                        new ResponseConnControl())
                .addAll(
                        new RequestValidateHost());
    }

    /**
     * Creates {@link HttpProcessor} initialized with default protocol interceptors
     * for server side HTTP/1.1 processing.
     *
     * @param serverInfo the server info text or {@code null} for default.
     * @return the processor.
     */
    public static HttpProcessor server(final String serverInfo) {
        return customServer(serverInfo).build();
    }

    /**
     * Creates {@link HttpProcessor} initialized with default protocol interceptors
     * for server side HTTP/1.1 processing.
     *
     * @return the processor.
     */
    public static HttpProcessor server() {
        return customServer(null).build();
    }

    /**
     * Creates {@link HttpProcessorBuilder} initialized with default protocol interceptors
     * for client side HTTP/1.1 processing.
     *
     * @param agentInfo the agent info text or {@code null} for default.
     * @return the processor builder.
     */
    public static HttpProcessorBuilder customClient(final String agentInfo) {
        return HttpProcessorBuilder.create()
                .addAll(
                        RequestContent.INSTANCE,
                        RequestTargetHost.INSTANCE,
                        RequestConnControl.INSTANCE,
                        new RequestUserAgent(!TextUtils.isBlank(agentInfo) ? agentInfo :
                                VersionInfo.getSoftwareInfo(SOFTWARE, "org.apache.hc.core5", HttpProcessors.class)),
                        RequestExpectContinue.INSTANCE);
    }

    /**
     * Creates {@link HttpProcessor} initialized with default protocol interceptors
     * for client side HTTP/1.1 processing.
     *
     * @param agentInfo the agent info text or {@code null} for default.
     * @return the processor.
     */
    public static HttpProcessor client(final String agentInfo) {
        return customClient(agentInfo).build();
    }

    /**
     * Creates {@link HttpProcessor} initialized with default protocol interceptors
     * for client side HTTP/1.1 processing.
     *
     * @return the processor.
     */
    public static HttpProcessor client() {
        return customClient(null).build();
    }

}