[Original] a convenient tool for android to access http resources-HttpHelper

HttpHelper. java

Package com.newcj.net; import java. io. IOException; import java. io. inputStream; import java. io. outputStream; import java. io. unsupportedEncodingException; import java.net. *; import org. apache. http. util. byteArrayBuffer; import android. graphics. bitmap; import android. graphics. bitmapFactory; import android. OS. handler; import android. util. log;/*** tool class to help you access http resources ** @ author <a href = "mailto: newcj@qq.com"> newcj </A> * @ version 1.0 2010/5/9 */public final class HttpHelper {public final static String TAG = "HttpHelper "; private final static String CONTENT_TYPE = "application/x-www-form-urlencoded"; private final static String ACCEPT = "*/*"; private final static String USER_AGENT = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: 1.9.1) Gecko/20090624 Firefox/3.5 "; /*** 1024 byte */private final static int BUFFER_LENGTH = 1024; private String referer; private Cookies cookies; private int timeout = 300000; public HttpHelper () {cookies = new Cookies ();}/*** get timeout time, the default value is 300000 milliseconds, that is, 5 minutes ** @ return */public int getTimeout () {return timeout ;} /*** set the timeout value to ReadTimeOut and ConnectTimeout. The unit of milliseconds is ** @ param timeout */public void setTimeout (int timeout) {this. timeout = timeout;}/*** get Referer ** @ return */Public String getReferer () {return referer;}/*** set Referer ** @ return */public void setReferer (String referer) {this. referer = referer;}/*** use the GET method to create a thread to obtain the webpage. The encoding method is gb2312, return null due to timeout or Encoding Error ** @ param strUrl * webpage URL * @ param handler * is used to send result information to the thread that initiates this call * @ param what * what mark in handler * /public void getHtmlByThread (String strUrl, handler handler, int what) {getHtmlByThread (strUrl, null, false ," Gb2312 ", handler, what);}/*** use the GET method to create a thread to obtain the webpage, return null ** @ param strUrl * webpage URL * @ param encoding * encoding method * @ param handler * for sending result information to the thread that initiates this call * @ param what mark in what * handler */public void getHtmlByThread (String strUrl, string encoding, Handler handler, int what) {getHtmlByThread (strUrl, null, false, encoding, handler, what );} /*** create a thread Based on the GET or POST method to obtain the webpage, and return null upon timeout ** @ param strUrl * webpage URL The data at the address * @ param strPost * POST * @ param isPost * is POST, and true indicates POST, false indicates the GET * @ param encoding * encoding method * @ param handler * used to send the result information to the thread initiating this call * @ param what * what mark in handler */public void getHtmlByThread (String strUrl, string strPost, boolean isPost, String encoding, Handler handler, int what) {if (handler = null) throw new NullPointerException ("handler is null. "); Thread t = new Thread (new Runn Er (strUrl, strPost, isPost, encoding, handler, what, Runner. TYPE_HTML); t. setDaemon (true); t. start ();}/*** GET the webpage using the GET method. The encoding method is gb2312, return null ** @ param strUrl * webpage URL * @ return webpage String */public String getHtml (String strUrl) {return getHtml (strUrl, null, false, "gb2312");}/*** GET the webpage using the GET method, return null ** @ param strUrl * webpage URL * @ param encoding * encoding method * @ return returns webpage String */public String get Html (String strUrl, String encoding) {return getHtml (strUrl, null, false, encoding);}/*** GET the webpage using the GET or POST method, return null ** @ param strUrl * webpage URL * @ param strPost * POST Data * @ param isPost * Whether to POST, true is POST, if false is set to GET * @ param encoding * encoding mode * @ return, the webpage String */public String getHtml (String strUrl, String strPost, boolean isPost, String encoding) is returned) {String ret = null; try {byte [] data = getHtm LBytes (strUrl, strPost, isPost, encoding); if (data! = Null) ret = new String (data, encoding);} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch block} return ret ;} /*** obtain network data based on the GET or POST method, return null ** @ param strUrl * webpage URL * @ param strPost * POST Data * @ param isPost * Whether to POST, true is POST, if the value is false, the GET * @ param encoding * encoding method * @ return returns bytes */public byte [] getHtmlBytes (String strUrl, String strPost, boolean isPost, String encoding) {Byte [] ret = null; HttpURLConnection httpCon = null; InputStream is = null; try {URL url = new URL (strUrl); httpCon = (HttpURLConnection) url. openConnection (); httpCon. setReadTimeout (timeout); httpCon. setConnectTimeout (timeout); httpCon. setUseCaches (false); httpCon. setInstanceFollowRedirects (true); httpCon. setRequestProperty ("Referer", referer); httpCon. setRequestProperty ("Content-Type", CONTENT_TYPE); htt PCon. setRequestProperty ("Accept", ACCEPT); httpCon. setRequestProperty ("User-Agent", USER_AGENT); httpCon. setRequestProperty ("Cookie", cookies. toString (); if (isPost) {httpCon. setDoOutput (true); httpCon. setRequestMethod ("POST"); httpCon. connect (); OutputStream OS = null; try {OS = httpCon. getOutputStream (); OS. write (URLEncoder. encode (strPost, encoding ). getBytes (); OS. flush ();} finally {if (OS! = Null) OS. close () ;}// obtain data is = httpCon. getInputStream (); ByteArrayBuffer baBuffer = null; byte [] buffer = new byte [BUFFER_LENGTH]; int rNum = 0; // If the read data length is less than BUFFER_LENGTH, it indicates that the read // content is less than BUFFER_LENGTH and has been read at a time. // at this time, the ByteArrayBuffer is not created. // The above does not apply. // if (rNum = is. read (buffer) <BUFFER_LENGTH) {// ret = buffer; //} else {baBuffer = new ByteArrayBuffer (BUFFER_LENGTH <1); // baBuffer. append (buffer, 0, BUFFER_LENGTH); while (rNum = is. read (buffer ))! =-1) {baBuffer. append (buffer, 0, rNum);} ret = baBuffer. toByteArray (); //} catch (Exception e) {// TODO Auto-generated catch blockLog. e (TAG, e. getMessage () + ":" + e. getCause ();} finally {if (is! = Null) {try {is. close ();} catch (IOException e) {// TODO Auto-generated catch block} // update Cookieif (httpCon! = Null) {cookies. putCookies (httpCon. getHeaderField ("Set-Cookie"); // update refererreferer = strUrl; httpCon. disconnect () ;}} return ret ;} /*** create a thread to obtain a webpage image ** @ param strUrl * @ param handler * is used to send the result information to the thread that initiates this call * @ param what * handler's mark of what */public void getBitmapByThread (String strUrl, handler handler, int what) {if (handler = null) throw new NullPointerException ("handler is null. "); Thread t = new Thread (new Runner (strUrl, null, false, null, handler, what, Runner. TYPE_IMG); t. setDaemon (true); t. start ();}/*** get a webpage image ** @ param strUrl * URL of the webpage image * @ return */public Bitmap getBitmap (String strUrl) {byte [] data = getHtmlBytes (strUrl, null, false, null); return BitmapFactory. decodeByteArray (data, 0, data. length);} private class Runner implements Runnable {public final static int TYPE_HTML = 1; public final static int TYPE_IMG = 2; private String strUrl; private String strPost; private boolean isPost; private String encoding; private Handler handler; private int what; private int type; public Runner (String strUrl, String strPost, boolean isPost, String encoding, Handler handler, int what, int type) {this. strUrl = strUrl; this. strPost = strPost; this. isPost = isPost; this. encoding = encoding; this. handler = handler; this. what = what; this. type = type ;}@ Overridepublic void run () {// TODO Auto-generated method stubObject obj = null; switch (type) {case TYPE_HTML: obj = getHtml (strUrl, strPost, isPost, encoding); break; case TYPE_IMG: obj = getBitmap (strUrl); break;} synchronized (handler) {handler. sendMessage (handler. obtainMessage (what, obj ));}}}}

Cookies. java

Package com.newcj.net; import java. util. hashMap; import java. util. map. entry; import java. util. set;/*** key value for non-synchronous Cookie storage ** @ author SomeWind **/public class Cookies {private HashMap <String, String> hashMap; public Cookies () {hashMap = new HashMap <String, String> () ;}/ *** clear all Cookie records in Cookies */public void clear () {hashMap. clear ();} /*** obtain the corresponding Cookie value based on the key ** @ param key * key of the Cookie value to be obtained * @ return if the key does not exist */public String getCookie (String key) {return hashMap. get (key );} /*** set a Cookie in Cookies ** @ param key * the key of the Cookie to be set * @ param value * the value of the Cookie to be set */public void putCookie (String key, string value) {hashMap. put (key, value);}/*** set the incoming Cookies in cookies ** @ param cookies */public void putCookies (String cookies) {if (cookies = null) return; String [] strCookies = cookies. split (";"); for (int I = 0; I <strCookies. length; I ++) {for (int j = 0; j <strCookies [I]. length (); j ++) {if (strCookies [I]. charAt (j) = ') {this. putCookie (strCookies [I]. substring (0, j), strCookies [I]. substring (j + 1, strCookies [I]. length () ;}}}/ *** cookie String */@ Overridepublic String toString () {// TODO Auto-generated method stubif (hashMap. isEmpty () return ""; Set <Entry <String, String> set = hashMap. entrySet (); StringBuilder sb = new StringBuilder (set. size () * 50); for (Entry <String, String> entry: set) {sb. append (String. format ("% s = % s;", entry. getKey (), entry. getValue ();} sb. delete (sb. length ()-1, sb. length (); return sb. toString ();}}