package com.xzx.gc.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;

public class HttpUtil {

    private final static int CONNECT_TIMEOUT = 5000; // in milliseconds  连接超时的时间
    private final static String DEFAULT_ENCODING = "UTF-8";  //字符串编码
    private static Logger lg= LoggerFactory.getLogger(HttpUtil.class);

    public static String postData(String urlStr, String data){
        return postData(urlStr, data, null);
    }
    /**
     * post数据请求
     * @param urlStr
     * @param data
     * @param contentType
     * @return
     */
    public static String postData(String urlStr, String data, String contentType){
        BufferedReader reader = null;
        try {
            URL url = new URL(urlStr);
            URLConnection conn = url.openConnection();
            conn.setDoOutput(true);
            conn.setConnectTimeout(CONNECT_TIMEOUT);
            conn.setReadTimeout(CONNECT_TIMEOUT);
            if(contentType != null){
                conn.setRequestProperty("content-type", contentType);

            }
            OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream(), DEFAULT_ENCODING);
            if(data == null){
                data = "";

            }
            writer.write(data);
            writer.flush();
            writer.close();

            reader = new BufferedReader(new InputStreamReader(conn.getInputStream(), DEFAULT_ENCODING));
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line);
                sb.append("\r\n");
            }
            return sb.toString();
        } catch (IOException e) {
            lg.info("Error connecting to " + urlStr + ": " + e.getMessage());
        } finally {
            try {
                if (reader != null){
                    reader.close();

                }
            } catch (IOException e) {
            }
        }
        return null;
    }
}