package com.terra.system.helper;
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import com.terra.common.entity.all.StaticData;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.http.HttpEntity;
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import org.apache.http.NameValuePair;
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import org.apache.http.client.entity.UrlEncodedFormEntity;
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import org.apache.http.client.methods.CloseableHttpResponse;
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import org.apache.http.client.methods.HttpGet;
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import org.apache.http.client.methods.HttpPost;
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import org.apache.http.impl.client.CloseableHttpClient;
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import org.apache.http.impl.client.HttpClients;
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import org.apache.http.util.EntityUtils;
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import org.springframework.web.client.RestTemplate;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.PrintStream;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Map;
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/**
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* Rest服务帮助类
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* @author WWW
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*/
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public class RestHelper {
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private static RestTemplate restTemplate;
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private final static Log log = LogFactory.getLog(RestHelper.class);
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/**
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* 获取RestTemplate
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*
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* @return RestTemplate
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*/
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public static RestTemplate getRestTemplate() {
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if (restTemplate == null) {
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restTemplate = SpringContextHelper.getBean(RestTemplate.class);
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}
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return restTemplate;
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}
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/**
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* Get请求-HttpURLConnection
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*
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* @param url URL地址
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* @return 字符串
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* @throws IOException IO异常
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*/
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public static String getForConn(String url) throws IOException {
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BufferedReader br = null;
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HttpURLConnection conn = null;
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try {
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URL restUrl = new URL(url);
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conn = (HttpURLConnection) restUrl.openConnection();
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// POST,GET,PUT,DELETE
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conn.setRequestMethod("GET");
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conn.setRequestProperty("Accept", "application/json");
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br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
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String line;
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StringBuilder sb = new StringBuilder();
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while ((line = br.readLine()) != null) {
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sb.append(line);
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}
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return sb.toString();
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} finally {
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if (br != null) {
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br.close();
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}
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if (conn != null) {
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conn.disconnect();
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}
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}
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}
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/**
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* Post请求-HttpURLConnection
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*
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* @param url URL地址
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* @param query 查询条件
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* @return 字符串
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* @throws IOException IO异常
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*/
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public static String postForConn(String url, String query) throws IOException {
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BufferedReader br = null;
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HttpURLConnection conn = null;
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try {
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URL restUrl = new URL(url);
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conn = (HttpURLConnection) restUrl.openConnection();
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// POST,GET,PUT,DELETE
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conn.setRequestMethod("POST");
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conn.setRequestProperty("Content-Type", "application/json");
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conn.setDoOutput(true);
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PrintStream ps = new PrintStream(conn.getOutputStream());
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ps.print(query);
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ps.close();
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// OutputStream out = conn.getOutputStream()
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// out.write(query.getBytes())
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// out.close()
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br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
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String line;
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StringBuilder sb = new StringBuilder();
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while ((line = br.readLine()) != null) {
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sb.append(line);
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}
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return sb.toString();
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} finally {
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if (br != null) {
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br.close();
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}
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if (conn != null) {
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conn.disconnect();
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}
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}
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}
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/**
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* Get请求-CloseableHttpClient
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*
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* @param uri Uri地址
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* @return 响应字符串
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*/
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public static String get(String uri) {
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try {
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CloseableHttpClient httpClient = HttpClients.custom().build();
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HttpGet httpGet = new HttpGet(uri);
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CloseableHttpResponse closeResponse = httpClient.execute(httpGet);
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// 取出返回体
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HttpEntity entity = closeResponse.getEntity();
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return EntityUtils.toString(entity, StaticData.TEXT_ENCODER);
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} catch (Exception ex) {
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log.error(ex.getMessage(), ex);
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return getErrorInfo(uri, ex);
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}
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}
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/**
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* Post请求-CloseableHttpClient
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*
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* @param uri Uri地址
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* @param postData 待发送数据
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* @return 响应字符串
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*/
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public static String post(String uri, List<NameValuePair> postData) {
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try {
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CloseableHttpClient httpClient = HttpClients.custom().build();
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UrlEncodedFormEntity postEntity = new UrlEncodedFormEntity(postData, StaticData.TEXT_ENCODER);
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HttpPost httpPost = new HttpPost(uri);
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httpPost.setEntity(postEntity);
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CloseableHttpResponse closeResponse = httpClient.execute(httpPost);
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// 取出返回体
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HttpEntity entity = closeResponse.getEntity();
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return EntityUtils.toString(entity, StaticData.TEXT_ENCODER);
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} catch (Exception ex) {
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log.error(ex.getMessage(), ex);
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return getErrorInfo(uri, ex);
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}
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}
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/**
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* 获取错误信息
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*
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* @param uri Uri地址
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* @param ex 异常
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* @return 错误信息
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*/
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public static String getErrorInfo(String uri, Exception ex) {
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Map<String, Object> map = new LinkedHashMap<>();
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map.put("result", null);
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map.put("message", ex.getMessage());
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map.put("code", 400);
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map.put("uri", uri);
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//map.put("tag", StaticData.CACHE_PREFIX)
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return map.toString();
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}
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/**
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* GET请求（REST）
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*/
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public static String getForRest(String uri) {
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RestTemplate rest = getRestTemplate();
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return rest.getForObject(uri, String.class);
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}
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/**
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* GET请求（REST）
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*/
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public static <T> T getForRest(String uri, Class<T> clazz) {
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RestTemplate rest = getRestTemplate();
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return rest.getForObject(uri, clazz);
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}
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/**
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* POST请求（REST）
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*/
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public static String postForRest(String uri, Map<String, Object> map) {
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RestTemplate rest = getRestTemplate();
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return rest.postForObject(uri, map, String.class);
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}
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/**
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* POST请求（REST）
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*/
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public static <T> String postForRest(String uri, List<T> list) {
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RestTemplate rest = getRestTemplate();
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return rest.postForObject(uri, list, String.class);
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}
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/**
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* POST请求（REST）
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*/
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public static <T> String postForRest(String uri, T t) {
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RestTemplate rest = getRestTemplate();
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return rest.postForObject(uri, t, String.class);
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}
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/**
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* DELETE请求（REST）
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*/
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public static void deleteForRest(String uri) {
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RestTemplate rest = getRestTemplate();
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rest.delete(uri);
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}
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}
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