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发表时间：2008-05-30
* 1,在HTTP的WEB应用中, 应用客户端和服务器之间的状态是通过Session来维持的, 而Session的本质就是Cookie,
package cn.javadr.product; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Map.Entry; /** * HttpClient * * @author Tang Ren email: <a * href="mailto:tangren1206@163.com">tangren1206@163.com</a> * * post@@http://www.51etest.com/dede/login.php@@userid=xxxx&pwd=xxxxxx&gotopage=/dede/&dopost=login * * post@@http://www.51etest.com/dede/ad_add.php@@dopost=save&tagname=test&typeid=0&adname=test&starttime=2008-05-29 * 20:58:25&endtime=2008-06-28 20:58:25×et=0&normbody=test&expbody=test * */ /** * */ public class HttpClient { private static final String USER_AGENT_VALUE = "Mozilla/4.0 (compatible; MSIE 6.0; Windows XP)"; /** * Cmd splitor default is symbol '$$'. */ private static final String HTTP_CLIENT_CMD_SPLITOR = "@@"; /** * Post parameter splitor default is symbol '&'. */ private static final String POST_PARAMETER_SPLITOR = "&"; private static final String POST_PARAMETER_KV_SPLITOR = "="; private String cookie = null; private Map cookieMap = new HashMap(); public static void main(String[] args) { HttpClient client = new HttpClient(); } public HttpClient() { // Input http request url BufferedReader consleReader = new BufferedReader(new InputStreamReader( System.in)); String httpResponse = null; String url = null; String cmd = null; String method = null; try { while (true) { cmd = consleReader.readLine(); if (cmd.indexOf(HTTP_CLIENT_CMD_SPLITOR) == -1) continue; method = cmd.split(HTTP_CLIENT_CMD_SPLITOR)[0]; url = cmd.split(HTTP_CLIENT_CMD_SPLITOR)[1]; if (method.toUpperCase().equals("GET")) { httpResponse = this.getMethod(url, true); } else if (method.toUpperCase().equals("POST")) { Map parameters = this.parsePostParameters(cmd .split(HTTP_CLIENT_CMD_SPLITOR)[2]); httpResponse = this.postMethod(url, parameters, true); } System.out.println(httpResponse); } } catch (IOException e) { e.printStackTrace(); } finally { try { consleReader.close(); } catch (IOException e) { e.printStackTrace(); } } } /** * Request specifid url with 'GET' method. And return HTTP response content. * * @param url * @return */ private String getMethod(String url, boolean keepCookie) { if (url == null || url.length() == 0) { return "Requst url could not be null or empty."; } StringBuffer result = new StringBuffer(); try { HttpURLConnection httpURLConnection = this.getHttpURLConnection( url, keepCookie); // Set request properties. this.settingHttpRequestHeader(httpURLConnection); httpURLConnection.setRequestMethod("GET"); // Getting or setting cookie this.gettingOrSettingCookie(httpURLConnection, keepCookie); InputStream httpInputStream = httpURLConnection.getInputStream(); BufferedReader httpBufferedReader = new BufferedReader( new InputStreamReader(httpInputStream, "GBK")); result.append(this.readBufferedContent(httpBufferedReader)); // Connect to host. httpURLConnection.connect(); } catch (IOException e) { e.printStackTrace(); return "getHttpURLConnection failed."; } return result.toString(); } public String postMethod(String url, Map parameters, boolean keepCookie) { StringBuffer httpResponse = new StringBuffer(); HttpURLConnection httpURLConnection = null; OutputStream httpOutputStream = null; try { httpURLConnection = this.getHttpURLConnection(url, keepCookie); // Set request properties. this.settingHttpRequestHeader(httpURLConnection); // Set request method with 'POST' httpURLConnection.setRequestMethod("POST"); // Set connection output is true. httpURLConnection.setDoOutput(true); // Getting or setting cookie this.gettingOrSettingCookie(httpURLConnection, keepCookie); // Get Http output stream httpOutputStream = httpURLConnection.getOutputStream(); // Build post parameters string StringBuffer postParams = new StringBuffer(); int index = 0; for (Iterator<Entry> iter = parameters.entrySet().iterator(); iter .hasNext(); index++) { Entry<String, String> entry = iter.next(); postParams.append(index != 0 ? "&" : ""); postParams.append(entry.getKey()); postParams.append("="); postParams.append(entry.getValue()); } httpOutputStream.write(postParams.toString().getBytes()); BufferedReader httpBufferedReader = new BufferedReader( new InputStreamReader(httpURLConnection.getInputStream())); httpResponse.append(this.readBufferedContent(httpBufferedReader)); } catch (IOException e) { e.printStackTrace(); return null; } finally { try { httpOutputStream.close(); } catch (IOException e) { e.printStackTrace(); } } return httpResponse.toString(); } /** * Setting HTTP request header properties * * @param httpURLConnection */ private void settingHttpRequestHeader(HttpURLConnection httpURLConnection) { if (httpURLConnection == null) return; httpURLConnection.setRequestProperty("User-Agent", USER_AGENT_VALUE); // TODO setting some other properties here . . . } /** * Get HttpURLConnection by specified url string. * * @param url * @return * @throws IOException */ private HttpURLConnection getHttpURLConnection(String url, boolean keepCookie) throws IOException { URL urlObj = new URL(url); URLConnection urlConnection = urlObj.openConnection(); if (urlConnection instanceof HttpURLConnection) return (HttpURLConnection) urlConnection; throw new MalformedURLException(); } /** * Read bufferedReader buffered content. * * @param bufferedReader * @return */ private String readBufferedContent(BufferedReader bufferedReader) { if (bufferedReader == null) return null; StringBuffer result = new StringBuffer(); String line = null; try { while ((line = bufferedReader.readLine()) != null) { result.append(line); } } catch (IOException e) { e.printStackTrace(); return null; } return result.toString(); } /** * Parse and create parameter map with parameter string * * @param parameterString * @return */ private Map parsePostParameters(String parameterString) { if (parameterString == null || parameterString.length() == 0) return null; Map result = new HashMap<String, String>(); // only one parameter key-value pair if (parameterString.indexOf(POST_PARAMETER_SPLITOR) == -1) { if (parameterString.indexOf(POST_PARAMETER_KV_SPLITOR) != -1) result.put(parameterString.split(POST_PARAMETER_KV_SPLITOR)[0], parameterString.split(POST_PARAMETER_KV_SPLITOR)[1]); } else { String[] keyValues = parameterString.split(POST_PARAMETER_SPLITOR); for (int i = 0; i < keyValues.length; i++) { String keyValue = keyValues[i]; result.put(keyValue.split(POST_PARAMETER_KV_SPLITOR)[0], keyValue.split(POST_PARAMETER_KV_SPLITOR)[1]); } } return result; } /** * Get or set cookie. * * @param httpURLConnection * @param keepCookie */ private void gettingOrSettingCookie(HttpURLConnection httpURLConnection, boolean keepCookie) { // Getting or setting cookie. if (cookie == null || cookie.length() == 0) { String setCookie = httpURLConnection.getHeaderField("Set-Cookie"); cookie = setCookie.substring(0, setCookie.indexOf(";")); } else if (keepCookie) { httpURLConnection.setRequestProperty("Cookie", cookie); } } }
本人水平有限,大家如果有任何问题,欢迎和我讨论. 联系方式Email: tangren1206@163.com QQ: 580126 声明：ITeye文章版权属于作者，受法律保护。没有作者书面许可不得转载。
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