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package ${basePackage}.frame.utils;
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import javax.net.ssl.*;
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import java.io.*;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.net.URLDecoder;
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import java.net.URLEncoder;
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import java.security.SecureRandom;
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import java.security.cert.CertificateException;
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import java.security.cert.X509Certificate;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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/**
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* WebUtils - 模拟http访问工具类
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*
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* @author wangbing
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* @version 0.0.1
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* @since 2017-01-01
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*/
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public class WebUtils {
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private static final String DEFAULT_CHARSET = "UTF-8";
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private static final String METHOD_POST = "POST";
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private static final String METHOD_GET = "GET";
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//private static final Certificate verisign; //
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private static boolean ignoreSSLCheck; // 忽略SSL检查
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private static class TrustAllTrustManager implements X509TrustManager {
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public X509Certificate[] getAcceptedIssuers() {
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return null;
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}
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public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
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}
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public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
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}
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}
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private WebUtils() {
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}
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public static void setIgnoreSSLCheck(boolean ignoreSSLCheck) {
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WebUtils.ignoreSSLCheck = ignoreSSLCheck;
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}
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/**
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* 执行HTTP POST请求。
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*
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* @param url 请求地址
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* @param params 请求参数
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* @return 响应字符串
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*/
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public static String doPost(String url, Map<String, String> params, int connectTimeout, int readTimeout) throws IOException {
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return doPost(url, params, DEFAULT_CHARSET, connectTimeout, readTimeout);
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}
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/**
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* 执行HTTP POST请求。
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*
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* @param url 请求地址
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* @param params 请求参数
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* @param charset 字符集，如UTF-8, GBK, GB2312
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* @return 响应字符串
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*/
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public static String doPost(String url, Map<String, String> params, String charset, int connectTimeout, int readTimeout) throws IOException {
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return doPost(url, params, charset, connectTimeout, readTimeout, null);
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}
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public static String doPost(String url, Map<String, String> params, String charset, int connectTimeout, int readTimeout, Map<String, String> headerMap) throws IOException {
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String ctype = "application/x-www-form-urlencoded;charset=" + charset;
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String query = buildQuery(params, charset);
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byte[] content = {};
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if (query != null) {
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content = query.getBytes(charset);
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}
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return _doPost(url, ctype, content, connectTimeout, readTimeout, headerMap);
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}
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/**
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* 执行HTTP POST请求。
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*
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* @param url 请求地址
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* @param ctype 请求类型
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* @param content 请求字节数组
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* @return 响应字符串
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*/
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public static String doPost(String url, String ctype, byte[] content, int connectTimeout, int readTimeout) throws IOException {
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return _doPost(url, ctype, content, connectTimeout, readTimeout, null);
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}
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private static String _doPost(String url, String ctype, byte[] content, int connectTimeout, int readTimeout, Map<String, String> headerMap) throws IOException {
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HttpURLConnection conn = null;
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OutputStream out = null;
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String rsp = null;
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try {
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try {
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conn = getConnection(new URL(url), METHOD_POST, ctype, headerMap);
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conn.setConnectTimeout(connectTimeout);
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conn.setReadTimeout(readTimeout);
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} catch (IOException e) {
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throw e;
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}
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try {
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out = conn.getOutputStream();
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out.write(content);
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rsp = getResponseAsString(conn);
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} catch (IOException e) {
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throw e;
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}
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} finally {
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if (out != null) {
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out.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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return rsp;
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}
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private static byte[] getTextEntry(String fieldName, String fieldValue, String charset) throws IOException {
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StringBuilder entry = new StringBuilder();
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entry.append("Content-Disposition:form-data;name=\"");
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entry.append(fieldName);
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entry.append("\"\r\nContent-Type:text/plain\r\n\r\n");
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entry.append(fieldValue);
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return entry.toString().getBytes(charset);
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}
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private static byte[] getFileEntry(String fieldName, String fileName, String mimeType, String charset) throws IOException {
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StringBuilder entry = new StringBuilder();
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entry.append("Content-Disposition:form-data;name=\"");
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entry.append(fieldName);
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entry.append("\";filename=\"");
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entry.append(fileName);
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entry.append("\"\r\nContent-Type:");
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entry.append(mimeType);
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entry.append("\r\n\r\n");
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return entry.toString().getBytes(charset);
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}
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/**
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* 执行HTTP GET请求。
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*
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* @param url 请求地址
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* @param params 请求参数
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* @return 响应字符串
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*/
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public static String doGet(String url, Map<String, String> params) throws IOException {
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return doGet(url, params, DEFAULT_CHARSET);
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}
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/**
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* 执行HTTP GET请求。
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*
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* @param url 请求地址
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* @param params 请求参数
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* @param charset 字符集，如UTF-8, GBK, GB2312
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* @return 响应字符串
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*/
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public static String doGet(String url, Map<String, String> params, String charset) throws IOException {
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HttpURLConnection conn = null;
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String rsp = null;
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try {
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String ctype = "application/x-www-form-urlencoded;charset=" + charset;
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String query = buildQuery(params, charset);
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try {
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conn = getConnection(buildGetUrl(url, query), METHOD_GET, ctype, null);
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} catch (IOException e) {
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throw e;
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}
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try {
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rsp = getResponseAsString(conn);
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} catch (IOException e) {
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throw e;
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}
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} finally {
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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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return rsp;
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}
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private static HttpURLConnection getConnection(URL url, String method, String ctype, Map<String, String> headerMap) throws IOException {
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HttpURLConnection conn = (HttpURLConnection) url.openConnection();
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if (conn instanceof HttpsURLConnection) {
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HttpsURLConnection connHttps = (HttpsURLConnection) conn;
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if (ignoreSSLCheck) {
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try {
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SSLContext ctx = SSLContext.getInstance("TLS");
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ctx.init(null, new TrustManager[]{new TrustAllTrustManager()}, new SecureRandom());
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connHttps.setSSLSocketFactory(ctx.getSocketFactory());
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connHttps.setHostnameVerifier(new HostnameVerifier() {
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public boolean verify(String hostname, SSLSession session) {
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return true;
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}
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});
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} catch (Exception e) {
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throw new IOException(e);
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}
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} else {
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try {
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//SSLContext ctx = SSLContext.getInstance("TLS");
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//ctx.init(null, new TrustManager[] { new VerisignTrustManager() }, new SecureRandom());
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//connHttps.setSSLSocketFactory(ctx.getSocketFactory());
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} catch (Exception e) {
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throw new IOException(e);
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}
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}
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conn = connHttps;
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}
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conn.setRequestMethod(method);
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conn.setDoInput(true);
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conn.setDoOutput(true);
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conn.setRequestProperty("Accept", "text/xml,text/javascript");
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conn.setRequestProperty("User-Agent", "top-sdk-java");
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conn.setRequestProperty("Content-Type", ctype);
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if (headerMap != null) {
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for (Map.Entry<String, String> entry : headerMap.entrySet()) {
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conn.setRequestProperty(entry.getKey(), entry.getValue());
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}
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}
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return conn;
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}
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private static URL buildGetUrl(String strUrl, String query) throws IOException {
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URL url = new URL(strUrl);
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if (isEmpty(query)) {
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return url;
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}
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if (isEmpty(url.getQuery())) {
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if (strUrl.endsWith("?")) {
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strUrl = strUrl + query;
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} else {
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strUrl = strUrl + "?" + query;
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}
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} else {
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if (strUrl.endsWith("&")) {
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strUrl = strUrl + query;
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} else {
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strUrl = strUrl + "&" + query;
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}
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}
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return new URL(strUrl);
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}
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public static String buildQuery(Map<String, String> params, String charset) throws IOException {
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if (params == null || params.isEmpty()) {
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return null;
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}
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StringBuilder query = new StringBuilder();
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Set<Map.Entry<String, String>> entries = params.entrySet();
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boolean hasParam = false;
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for (Map.Entry<String, String> entry : entries) {
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String name = entry.getKey();
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String value = entry.getValue();
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// 忽略参数名或参数值为空的参数
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if (areNotEmpty(name, value)) {
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if (hasParam) {
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query.append("&");
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} else {
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hasParam = true;
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}
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query.append(name).append("=").append(URLEncoder.encode(value, charset));
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}
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}
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return query.toString();
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}
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public static boolean isEmpty(String value) {
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int strLen;
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if (value == null || (strLen = value.length()) == 0) {
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return true;
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}
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for (int i = 0; i < strLen; i++) {
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if ((Character.isWhitespace(value.charAt(i)) == false)) {
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return false;
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}
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}
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return true;
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}
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/**
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* 检查指定的字符串列表是否不为空。
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*/
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public static boolean areNotEmpty(String... values) {
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boolean result = true;
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if (values == null || values.length == 0) {
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result = false;
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} else {
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for (String value : values) {
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result &= !isEmpty(value);
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}
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}
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return result;
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}
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protected static String getResponseAsString(HttpURLConnection conn) throws IOException {
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String charset = getResponseCharset(conn.getContentType());
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InputStream es = conn.getErrorStream();
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if (es == null) {
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return getStreamAsString(conn.getInputStream(), charset);
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} else {
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String msg = getStreamAsString(es, charset);
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if (isEmpty(msg)) {
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throw new IOException(conn.getResponseCode() + ":" + conn.getResponseMessage());
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} else {
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throw new IOException(msg);
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}
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}
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}
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private static String getStreamAsString(InputStream stream, String charset) throws IOException {
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try {
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Reader reader = new InputStreamReader(stream, charset);
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StringBuilder response = new StringBuilder();
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final char[] buff = new char[1024];
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int read = 0;
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while ((read = reader.read(buff)) > 0) {
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response.append(buff, 0, read);
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}
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return response.toString();
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} finally {
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if (stream != null) {
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stream.close();
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}
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}
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}
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private static String getResponseCharset(String ctype) {
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String charset = DEFAULT_CHARSET;
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if (!isEmpty(ctype)) {
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String[] params = ctype.split(";");
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for (String param : params) {
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param = param.trim();
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if (param.startsWith("charset")) {
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String[] pair = param.split("=", 2);
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if (pair.length == 2) {
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if (!isEmpty(pair[1])) {
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charset = pair[1].trim();
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}
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}
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break;
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}
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}
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}
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return charset;
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}
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/**
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* 使用默认的UTF-8字符集反编码请求参数值。
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*
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* @param value 参数值
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* @return 反编码后的参数值
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*/
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public static String decode(String value) {
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return decode(value, DEFAULT_CHARSET);
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}
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/**
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* 使用默认的UTF-8字符集编码请求参数值。
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*
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* @param value 参数值
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* @return 编码后的参数值
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*/
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public static String encode(String value) {
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return encode(value, DEFAULT_CHARSET);
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}
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/**
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* 使用指定的字符集反编码请求参数值。
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*
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* @param value 参数值
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* @param charset 字符集
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* @return 反编码后的参数值
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*/
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public static String decode(String value, String charset) {
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String result = null;
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if (!isEmpty(value)) {
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try {
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result = URLDecoder.decode(value, charset);
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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}
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return result;
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}
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/**
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* 使用指定的字符集编码请求参数值。
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*
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* @param value 参数值
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* @param charset 字符集
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* @return 编码后的参数值
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*/
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public static String encode(String value, String charset) {
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String result = null;
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if (!isEmpty(value)) {
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try {
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result = URLEncoder.encode(value, charset);
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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}
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return result;
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}
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private static Map<String, String> getParamsFromUrl(String url) {
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Map<String, String> map = null;
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if (url != null && url.indexOf('?') != -1) {
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map = splitUrlQuery(url.substring(url.indexOf('?') + 1));
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}
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if (map == null) {
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map = new HashMap<String, String>();
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}
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return map;
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}
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/**
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* 从URL中提取所有的参数。
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*
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* @param query URL地址
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* @return 参数映射
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*/
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public static Map<String, String> splitUrlQuery(String query) {
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Map<String, String> result = new HashMap<String, String>();
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String[] pairs = query.split("&");
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if (pairs != null && pairs.length > 0) {
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for (String pair : pairs) {
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String[] param = pair.split("=", 2);
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if (param != null && param.length == 2) {
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result.put(param[0], param[1]);
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}
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}
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}
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return result;
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}
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}
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