独角兽企业重金招聘Python工程师标准>>>
出现的过程
最近在用程序模拟一个web站的https登录，然后进行一些后续操作的小玩意。先使用java程序写测试代码，测试通过移植到android。
java基于httpclient-4.3.1.jar开发。
android端使用自带的HttpClient。(sdk版本14)
代码移植到android环境，https请求出现403(请求被拒绝)，Google N久找不到答案 - -。但是java一次又一次都能成功！
处理方法
最终换jar！使用commons-httpclient-3.1.jar！业务逻辑不变，程序测试通过！
我！很！忧！伤！(java端可以，android端不行。)
(jar是从/atearsan/android-app/tree/master/libs里下的- -，我懒，直接用osc那边的)
同样是403，其他的一些可能情况
我这个情况可能特殊，Google时也发现了其他的一些情况，顺便记录下。
1.缺少header参数.常见的如下:
post.addHeader("Referer", xx);post.addHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");post.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63");post.addHeader("Host", xx);
2. 缺少cookie信息.
这个就需要分析实际的请求了。可以借助一些工具分析(http/https/tcp)请求链接，常见的工具有：
Fiddler
Wireshark
还有直接浏览器调式也行，但是可能不够用，请求过程不够清晰
java端和android端部分关键代码
不知道贴出来是否有实际用处，先贴出来吧。
java端:
public void login() {try {List<NameValuePair> loginParams = new ArrayList<NameValuePair>();loginParams.add(new BasicNameValuePair("appuri", appuri));loginParams.add(new BasicNameValuePair("useruri", useruri));loginParams.add(new BasicNameValuePair("service", service));loginParams.add(new BasicNameValuePair("sid", null));loginParams.add(new BasicNameValuePair("uname", name));loginParams.add(new BasicNameValuePair("action", action));loginParams.add(new BasicNameValuePair("pwd", password));HttpPost post = new HttpPost(loginURL);post.addHeader("Referer", referer);post.addHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");post.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63");post.addHeader("Host", "xxxxxxxxx");post.setEntity(new UrlEncodedFormEntity(loginParams, HTTP.UTF_8));// 发送登录请求HttpResponse response = httpClient.execute(post);if (response.getStatusLine().getStatusCode() == HttpStatus.SC_MOVED_TEMPORARILY) {post.releaseConnection();// 获取重定向地址String location = getLocation(response);if (!"".equals(location)) {String signURL = getSignURL(location);if(!"".equals(signURL)) {signIn(signURL);} else {System.out.println("signURL为空");}} else {System.out.println("location为空");}} else {System.out.println("登录出错了");}} catch (Exception e) {e.printStackTrace();}}
android端的实现:
public void login() {try {/*List<NameValuePair> loginParams = new ArrayList<NameValuePair>();loginParams.add(new BasicNameValuePair("appuri", appuri));loginParams.add(new BasicNameValuePair("useruri", useruri));loginParams.add(new BasicNameValuePair("service", service));loginParams.add(new BasicNameValuePair("sid", ""));loginParams.add(new BasicNameValuePair("uname", name));loginParams.add(new BasicNameValuePair("action", action));loginParams.add(new BasicNameValuePair("pwd", password));HttpPost post = new HttpPost(loginURL);post.addHeader("Referer", referer);post.addHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");post.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63");post.addHeader("Host", "xxx");post.setEntity(new UrlEncodedFormEntity(loginParams, HTTP.UTF_8));HttpResponse response = httpClient.execute(post);*/HttpClient cc = new HttpClient();PostMethod pm = new PostMethod(loginURL);mons.httpclient.NameValuePair[] parametersBody = {new mons.httpclient.NameValuePair("appuri", appuri),new mons.httpclient.NameValuePair("useruri", useruri),new mons.httpclient.NameValuePair("service", service),new mons.httpclient.NameValuePair("sid", ""),new mons.httpclient.NameValuePair("uname", name),new mons.httpclient.NameValuePair("action", action),new mons.httpclient.NameValuePair("pwd", password)};pm.setRequestBody(parametersBody);pm.setRequestHeader("Referer", referer);pm.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");pm.setRequestHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63");pm.setRequestHeader("Host", "xxx");//int statusCode = response.getStatusLine().getStatusCode();int statusCode = cc.executeMethod(pm);// 登录请求if (statusCode == HttpStatus.SC_MOVED_TEMPORARILY) {String location = getLocation(pm);// 获取重定向地址//String location = getLocation(response);if (!TUtil.EMPTY.equals(location)) {String signURL = getSignURL(location);if(!TUtil.EMPTY.equals(signURL)) {signIn(signURL);} else {String log = "获取签到地址失败";super.notification(TUtil.TYPE_CM_E_CODE, log);}} else {String log = "获取重定向地址失败";super.notification(TUtil.TYPE_CM_E_CODE, log);}} else {String log = "登录失败.状态码:"+statusCode;super.notification(TUtil.TYPE_CM_E_CODE, log);}} catch (Exception e) {Log.e(e);String log = "登录异常:"+e.getMessage();super.notification(TUtil.TYPE_CM_E_CODE, log);}}
// java端和android代码对比结果：
// 代码真的没啥差异，android端被注释的那些就是使用自带的HttpClient，但是偏偏登录请求一直是403.
// 换成基于commons-httpclient-3.1.jar的HttpClient，没问题了！
//
// 我还有个问题就是：android sdk 14 自带的apche HttpClient是什么年代的版本...??? java端4.3没问题- -
