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memfactory-auth
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package com.memfactory.auth.util;

import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public final class HttpUtil {
	private HttpUtil() {
	}

	public static RequestConfig getConfig() {
		return RequestConfig.custom().setConnectTimeout(500).setConnectionRequestTimeout(5000).build();
	}

	public static String post(String url, Map params, Map headers) {
		RequestConfig requestConfig = getConfig();
		HttpClient httpClient = null;
		HttpResponse httpResponse = null;

		HttpPost httpPost = new HttpPost(url);
		if (headers != null && !headers.isEmpty()) {
			for (Map.Entry header : headers.entrySet()) {
				httpPost.setHeader(header.getKey(), header.getValue());
			}
		}

		try {

			if (params != null && !params.isEmpty()) {
				List list = new LinkedList();
				for (Map.Entry param : params.entrySet()) {
					list.add(new BasicNameValuePair(param.getKey(), param.getValue()));
				}
				UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(list, "utf-8");
				httpPost.setEntity(formEntity);
			}

			httpClient = HttpClientBuilder.create().setDefaultRequestConfig(requestConfig).build();
			httpResponse = httpClient.execute(httpPost);
			HttpEntity httpEntity = httpResponse.getEntity();
			return EntityUtils.toString(httpEntity, "utf-8");
		} catch (Exception e) {
			throw new RuntimeException("got error from http post:" + url, e);
		}

	}

	public static String postBody(String url, String json) {
		RequestConfig requestConfig = getConfig();
		HttpClient httpClient = null;
		HttpResponse httpResponse = null;
		HttpPost httpPost = new HttpPost(url);

		try {
			StringEntity postString = new StringEntity(json);
			httpPost.setEntity(postString);
			httpPost.setHeader("Content-type", "application/json");
			httpClient = HttpClientBuilder.create().setDefaultRequestConfig(requestConfig).build();
			httpResponse = httpClient.execute(httpPost);
			HttpEntity httpEntity = httpResponse.getEntity();
			return EntityUtils.toString(httpEntity, "utf-8");
		} catch (Exception e) {
			throw new RuntimeException("got error from http post:" + url, e);
		}
	}

	public static String get(String url, Map params, Map headers) {
		RequestConfig requestConfig = getConfig();

		if (params != null && !params.isEmpty()) {
			String paramUrl = "";
			for (Map.Entry param : params.entrySet()) {
				paramUrl += "&" + param.getKey() + "=" + param.getValue();
			}
			paramUrl = paramUrl.substring(1);
			url += url.contains("?") ? paramUrl : ("?" + paramUrl);
		}

		HttpGet httpGet = new HttpGet(url);
		if (headers != null && !headers.isEmpty()) {
			for (Map.Entry header : headers.entrySet()) {
				httpGet.setHeader(header.getKey(), header.getValue());
			}
		}

		HttpClient httpClient = null;
		HttpResponse httpResponse = null;

		try {
			httpClient = HttpClientBuilder.create().setDefaultRequestConfig(requestConfig).build();
			httpResponse = httpClient.execute(httpGet);
			HttpEntity entity = httpResponse.getEntity();
			return EntityUtils.toString(entity, "UTF-8");
		} catch (Exception e) {
			throw new RuntimeException("got error from http get:" + url, e);
		}
	}

}