com.mmd.mssp.util.HttpUtil.java Source code

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Here is the source code for com.mmd.mssp.util.HttpUtil.java

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package com.mmd.mssp.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Map;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

/**
 *
 * @author changshu.li
 */
public class HttpUtil {

    private static final Log logger = LogFactory.getLog(HttpUtil.class);
    private static final int BUFFER_SIZE = 1024 * 15;

    public static String httpGet(String uri) throws IOException {
        HttpClient httpclient = new DefaultHttpClient();
        HttpGet httpget = new HttpGet(uri);
        HttpResponse response = httpclient.execute(httpget);

        logger.info(httpget.getURI().toString() + " == " + response.getStatusLine());

        HttpEntity entity = response.getEntity();
        Header[] cts = response.getHeaders("Content-Type");
        String charset = "UTF-8";
        if (cts.length > 0) {
            String ContentType = cts[0].getValue();
            if (ContentType.contains("charset")) {
                charset = ContentType.split("charset=")[1];
            }
        }
        if (entity != null) {
            InputStream instream = entity.getContent();
            try {
                StringBuffer buffer = new StringBuffer();
                char[] chars = new char[BUFFER_SIZE];
                while (true) {
                    BufferedReader reader = new BufferedReader(new InputStreamReader(instream, charset));
                    int len = reader.read(chars);
                    if (len < 0) {
                        break;
                    }
                    buffer.append(chars, 0, len);
                }
                return buffer.toString();
            } catch (IOException ex) {
                throw ex;
            } catch (RuntimeException ex) {
                httpget.abort();
                throw ex;
            } finally {
                instream.close();
                httpclient.getConnectionManager().shutdown();
            }
        }
        return "";
    }

    public static String putParam4query(String uri, String key, String val) {
        if (uri.contains("?")) {
            return uri + "&" + key + "=" + val;
        }
        return uri + "?" + key + "=" + val;
    }

    public static String putParams(String uri, Map<String, String> params) {
        if (params != null) {
            Set<String> set = params.keySet();
            for (String key : set) {
                uri = putParam4query(uri, key, params.get(key));
            }
        }
        return uri;
    }

}