Java tutorial
/** * Copyright (c) 2011-2015, James Zhan (jfinal@126.com). * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.wx.kernel.util; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLEncoder; import java.security.KeyManagementException; import java.security.NoSuchAlgorithmException; import java.security.NoSuchProviderException; import java.security.cert.CertificateException; import java.security.cert.X509Certificate; import java.util.Map; import java.util.Map.Entry; import javax.net.ssl.HostnameVerifier; import javax.net.ssl.HttpsURLConnection; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLSession; import javax.net.ssl.SSLSocketFactory; import javax.net.ssl.TrustManager; import javax.net.ssl.X509TrustManager; import javax.servlet.http.HttpServletRequest; import org.apache.commons.lang.StringUtils; /** * HttpKit */ public class HttpKit { private HttpKit() { } /** * https ?? */ private class TrustAnyHostnameVerifier implements HostnameVerifier { public boolean verify(String hostname, SSLSession session) { return true; } } /** * https ?? */ private class TrustAnyTrustManager implements X509TrustManager { public X509Certificate[] getAcceptedIssuers() { return null; } public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException { } public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException { } } private static final String GET = "GET"; private static final String POST = "POST"; private static final String CHARSET = "UTF-8"; private static final SSLSocketFactory sslSocketFactory = initSSLSocketFactory(); private static final TrustAnyHostnameVerifier trustAnyHostnameVerifier = new HttpKit().new TrustAnyHostnameVerifier(); private static SSLSocketFactory initSSLSocketFactory() { try { TrustManager[] tm = { new HttpKit().new TrustAnyTrustManager() }; SSLContext sslContext = SSLContext.getInstance("TLS", "SunJSSE"); sslContext.init(null, tm, new java.security.SecureRandom()); return sslContext.getSocketFactory(); } catch (Exception e) { throw new RuntimeException(e); } } private static HttpURLConnection getHttpConnection(String url, String method, Map<String, String> headers) throws IOException, NoSuchAlgorithmException, NoSuchProviderException, KeyManagementException { URL _url = new URL(url); HttpURLConnection conn = (HttpURLConnection) _url.openConnection(); if (conn instanceof HttpsURLConnection) { ((HttpsURLConnection) conn).setSSLSocketFactory(sslSocketFactory); ((HttpsURLConnection) conn).setHostnameVerifier(trustAnyHostnameVerifier); } conn.setRequestMethod(method); conn.setDoOutput(true); conn.setDoInput(true); conn.setConnectTimeout(19000); conn.setReadTimeout(19000); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36"); if (headers != null && !headers.isEmpty()) for (Entry<String, String> entry : headers.entrySet()) conn.setRequestProperty(entry.getKey(), entry.getValue()); return conn; } /** * Send GET request */ public static String get(String url, Map<String, String> queryParas, Map<String, String> headers) { HttpURLConnection conn = null; try { conn = getHttpConnection(buildUrlWithQueryString(url, queryParas), GET, headers); conn.connect(); return readResponseString(conn); } catch (Exception e) { throw new RuntimeException(e); } finally { if (conn != null) { conn.disconnect(); } } } public static String get(String url, Map<String, String> queryParas) { return get(url, queryParas, null); } public static String get(String url) { return get(url, null, null); } /** * Send POST request */ public static String post(String url, Map<String, String> queryParas, String data, Map<String, String> headers) { HttpURLConnection conn = null; try { conn = getHttpConnection(buildUrlWithQueryString(url, queryParas), POST, headers); conn.connect(); OutputStream out = conn.getOutputStream(); out.write(data.getBytes(CHARSET)); out.flush(); out.close(); return readResponseString(conn); } catch (Exception e) { throw new RuntimeException(e); } finally { if (conn != null) { conn.disconnect(); } } } public static String post(String url, Map<String, String> queryParas, String data) { return post(url, queryParas, data, null); } public static String post(String url, String data, Map<String, String> headers) { return post(url, null, data, headers); } public static String post(String url, String data) { return post(url, null, data, null); } private static String readResponseString(HttpURLConnection conn) { StringBuilder sb = new StringBuilder(); InputStream inputStream = null; try { inputStream = conn.getInputStream(); BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, CHARSET)); String line = null; while ((line = reader.readLine()) != null) { sb.append(line).append("\n"); } return sb.toString(); } catch (Exception e) { throw new RuntimeException(e); } finally { if (inputStream != null) { try { inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } } /** * Build queryString of the url */ private static String buildUrlWithQueryString(String url, Map<String, String> queryParas) { if (queryParas == null || queryParas.isEmpty()) return url; StringBuilder sb = new StringBuilder(url); boolean isFirst; if (url.indexOf("?") == -1) { isFirst = true; sb.append("?"); } else { isFirst = false; } for (Entry<String, String> entry : queryParas.entrySet()) { if (isFirst) isFirst = false; else sb.append("&"); String key = entry.getKey(); String value = entry.getValue(); if (StringUtils.isNotEmpty(value)) try { value = URLEncoder.encode(value, CHARSET); } catch (UnsupportedEncodingException e) { throw new RuntimeException(e); } sb.append(key).append("=").append(value); } return sb.toString(); } public static String readIncommingRequestData(HttpServletRequest request) { BufferedReader br = null; try { StringBuilder result = new StringBuilder(); br = request.getReader(); for (String line = null; (line = br.readLine()) != null;) { result.append(line).append("\n"); } return result.toString(); } catch (IOException e) { throw new RuntimeException(e); } finally { if (br != null) try { br.close(); } catch (IOException e) { e.printStackTrace(); } } } }