cn.vlabs.duckling.common.http.WebSite.java Source code

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Here is the source code for cn.vlabs.duckling.common.http.WebSite.java

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/*
 * Copyright (c) 2008-2016 Computer Network Information Center (CNIC), Chinese Academy of Sciences.
 * 
 * This file is part of Duckling project.
 *
 * 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 cn.vlabs.duckling.common.http;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.MultiThreadedHttpConnectionManager;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;

public class WebSite {
    public WebSite(String baseurl) {
        client = new HttpClient(new MultiThreadedHttpConnectionManager());
        baseURL = baseurl;
    }

    public static String getBodyContent(String url) {
        int index = url.indexOf("?");
        String query = "";
        if (index > 0) {
            query = url.substring(index + 1, url.length());
            url = url.substring(0, index);
        }
        WebSite site = new WebSite(url);
        if (query.trim().length() > 0) {
            PostMethod method = site.createPostMethod(null);
            Map<String, String> params = extractParams(query.trim());
            for (String key : params.keySet()) {
                method.addParameter(key, params.get(key));
            }
            try {
                int code = site.exec(method);
                if (code == 200) {
                    return method.getResponseBodyAsString();
                }
            } catch (HttpException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                method.releaseConnection();
                site.close();
            }
        } else {
            GetMethod method = site.createGetMethod("");
            try {
                int code = site.exec(method);
                if (code == 200) {
                    return method.getResponseBodyAsString();
                }
            } catch (HttpException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                method.releaseConnection();
                site.close();
            }
        }
        return null;
    }

    private static Map<String, String> extractParams(String query) {

        Map<String, String> params = new HashMap<String, String>();
        Pattern p = Pattern.compile("([^&]+)=([^&]+)");
        Matcher m = p.matcher(query);
        while (m.find()) {
            String key = m.group(1).trim();
            if (key.length() > 0) {
                params.put(key, m.group(2));
            }

        }
        return params;
    }

    //    public static void main(String[]ars)
    //    {
    //       System.out.println(getBodyContent("http://localhost/umt/getUMTPublicKey"));
    //    }
    public GetMethod createGetMethod(String url) {
        if (url == null)
            return new EncodableGetMethod(baseURL, encode);
        else
            return new EncodableGetMethod(baseURL + url, encode);
    }

    public PostMethod createPostMethod(String url) {
        if (url == null)
            return new EncodablePostMethod(baseURL, encode);
        else
            return new EncodablePostMethod(baseURL + url, encode);
    }

    public int exec(HttpMethod method) throws HttpException, IOException {
        return client.executeMethod(method);
    }

    public void close() {
        client.getHttpConnectionManager().closeIdleConnections(0);
    }

    public void closeIdle() {
        client.getHttpConnectionManager().closeIdleConnections(idleTimeout);
    }

    public void setTimeout(long msTimeout) {
        this.idleTimeout = msTimeout;
    }

    public void setEncode(String encode) {
        this.encode = encode;
    }

    private String encode = "UTF-8";
    private String baseURL;
    // 
    private long idleTimeout = 5000;
    private HttpClient client;
}