/*
 * Copyright 2005 the original author or authors.
 * 
 * Licensed 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.wamblee.crawler;

import java.io.PrintStream;

import javax.xml.transform.TransformerException;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.PostMethod;
import org.w3c.dom.Document;

/**
 * Retrieving pages using the post method.
 */
public class PostPageRequest extends AbstractPageRequest {

    public PostPageRequest(int aMaxTries, int aMaxDelay, NameValuePair[] aParams, String aXslt) {
        super(aMaxTries, aMaxDelay, aParams, aXslt, null);
    }

    public PostPageRequest(int aMaxTries, int aMaxDelay, NameValuePair[] aParams, String aXslt,
            PrintStream aOs) {
        super(aMaxTries, aMaxDelay, aParams, aXslt, aOs);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.wamblee.crawler.PageRequest#execute(java.lang.String,
     *      org.apache.commons.httpclient.HttpClient)
     */
    public Document execute(String aUrl, HttpClient aClient)
            throws PageException {
        PostMethod method = new PostMethod(aUrl);
        method.addParameters(getParameters());
        try {
            return executeMethod(aClient, method);
        } catch (TransformerException e) {
            throw new PageException(e.getMessage(), e);
        }
    }

}