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/**
 * Copyright (C) 2009-2013 Couchbase, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING
 * IN THE SOFTWARE.
 */
package com.couchbase.client.http;

import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.protocol.HTTP;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.Args;

import java.io.IOException;

/**
 * Custom connection control, derived from an example implementation and extended for
 * optional non-persistent connections.
 */
public class CustomRequestConnControl implements HttpRequestInterceptor {

    private final boolean shouldClose;

    public CustomRequestConnControl(final boolean shouldClose) {
        super();
        this.shouldClose = shouldClose;
    }

    public void process(final HttpRequest request, final HttpContext context)
        throws HttpException, IOException {
        Args.notNull(request, "HTTP request");

        final String method = request.getRequestLine().getMethod();
        if (method.equalsIgnoreCase("CONNECT")) {
            return;
        }

        if (!request.containsHeader(HTTP.CONN_DIRECTIVE)) {
            if (shouldClose) {
                request.addHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_CLOSE);
            } else {
                request.addHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE);
            }
        }
    }
}