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package com.zoomlion.cloud.common.util;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;


public class HttpClientUtils {
	protected static Log log = LogFactory.getLog(HttpClientUtils.class);
	
	public static String httpsRequest(String requestUrl, String requestMethod,  Map params) {
		if(requestMethod.equalsIgnoreCase("POST")){
			return post(requestUrl, params, HttpClientFactory.getHttpsInstance(), false);
		}
		
		if(requestMethod.equalsIgnoreCase("GET")){
			return get(requestUrl, HttpClientFactory.getHttpsInstance());
		}
		
		return null;
	}
	
	public static String httpRequest(String requestUrl, String requestMethod, Map params) {
		
		if(requestMethod.equalsIgnoreCase("POST")){
			return post(requestUrl, params, HttpClientFactory.getHttpInstance(), false);
		}
		
		if(requestMethod.equalsIgnoreCase("GET")){
			return get(requestUrl, HttpClientFactory.getHttpInstance());
		}
		
		return null;
	}
	
    
    /**
	 * Post请求
	 * @param url 请求地址
	 * @param postData 参数
	 * @param noNeedResponse 不需要返回结果
	 * @return 返回字符串
	 */
    private static String post(String url, Map params, CloseableHttpClient httpClient, boolean noNeedResponse){
        String responseData = null;
        CloseableHttpResponse response = null;
        try {
			HttpPost method = new HttpPost(url); 
            if (null != params) {
            	//装填参数  
            	List nvps = new ArrayList();  
                for (Entry entry : params.entrySet()) {  
                    nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));  
                }  
                //设置参数到请求对象中  
                method.setEntity(new UrlEncodedFormEntity(nvps, "UTF-8"));  
            }
            method.setHeader("Content-type", "application/x-www-form-urlencoded");  
            response = httpClient.execute(method);
            /**请求发送成功，并得到响应**/
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                /**读取服务器返回过来的字符串数据**/
                responseData = EntityUtils.toString(response.getEntity(), "UTF-8");
                if (noNeedResponse) {
                    return null;
                }
            }
        } catch (IOException e) {
        	log.error("Post请求提交失败:" + url, e);
        }catch (Exception e) {
			log.error("http请求异常：{}", e);
		}finally{
			try {
				if(response != null){
					response.close();
				}
				if(httpClient != null) {
					httpClient.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
        return responseData;
    }
    
    /**
     * 发送Get请求
     * @param url 请求地址
     * @return 返回字符串
     */
    private static String get(String url, CloseableHttpClient httpClient){
    	String responseData = null;
    	CloseableHttpResponse response = null;
        try {
            //发送get请求
            HttpGet request = new HttpGet(url);
            response = httpClient.execute(request);
 
            /**请求发送成功，并得到响应**/
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                /**读取服务器返回过来的json字符串数据**/
                responseData = EntityUtils.toString(response.getEntity(), "UTF-8");
            } else {
                log.error("Get请求提交失败:" + url);
            }
        } catch (IOException e) {
        	log.error("Get请求提交失败:" + url, e);
        }catch (Exception e) {
			log.error("http请求异常：{}", e);
		}finally{
			try {
				if(response != null){
					response.close();
				}
				if(httpClient != null) {
					httpClient.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
        
        return responseData;
    }

}