//网站A跨域访问网站B的某个方法并返回
//这是网站A的后台
protected void processRequest(HttpServletRequest request, HttpServletResponse response) throwsIOException {
String json_string = "{'mes':null,'error':false}";
response.setCharacterEncoding("utf-8");
response.setHeader("Access-Control-Allow-Origin", "*");
try {
String basePath = request.getParameter("basePath");
String username = request.getParameter("username");
String password = request.getParameter("password");
json_string=login_(basePath,username,password);
}catch (Exception e){
}
response.getWriter().print(json_string);
return ;
}
public String login_(String basePath,String userName,String password)throws Exception{
URL realUrl = new URL(basePath);
HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
conn.setRequestMethod("POST"); // 设置请求方式
conn.setDoOutput(true);// 是否输入参数
StringBuffer params = new StringBuffer();
// 表单参数与get形式一样
params.append("username").append("=")
.append(URLEncoder.encode(userName, "utf-8")).append("&")
.append("password").append("=").append(password);
byte[] bypes = params.toString().getBytes();
conn.getOutputStream().write(bypes);// 输入参数
InputStream inStream=conn.getInputStream();
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while( (len = inStream.read(buffer)) !=-1 ){
outStream.write(buffer, 0, len);
}
byte[] data = outStream.toByteArray();//网页的二进制数据
outStream.close();
inStream.close();
//处理中文乱码并返回json数据
return new String(data, "utf-8");
}
//这是网站B中被跨域访问的方法
//接收从网站A传过来的用户名和密码，验证用户名密码是否正确并返回结果
private final static ObjectMapper objectMapper = new ObjectMapper();
protected void processRequest(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
String username = request.getParameter("username");
String password = request.getParameter("password");
LoginMessage lm = new LoginMessage();
lm.error = true;
if ( !"true".equals(request.getParameter("isdemo")) && SecurityUtils.getSubject().isAuthenticated()) {
lm.mes = "当前会话已经是验证通过了的.";
lm.error = false;
} else {
if (Strings.isNullOrEmpty(username) || Strings.isNullOrEmpty(password)) {
lm.mes = "用户名或密码不能为空.";
} else {
UsernamePasswordToken token = new UsernamePasswordToken(username, password);
try {
SecurityUtils.getSubject().login(token);
lm.error = false;
} catch (AuthenticationException e) {
if (e instanceof LockedAccountException) {
lm.mes = "用户密码不正确.";
} else {
lm.mes = Throwables.getRootCause(e).getMessage();
}
} catch (Exception e) {
e.printStackTrace();
lm.mes = Throwables.getRootCause(e).getMessage();
}
}
}
response.setCharacterEncoding("utf-8");
response.setHeader("Access-Control-Allow-Origin", "*");
PrintWriter out = response.getWriter();
out.println(objectMapper.writeValueAsString(lm));//返回jsonp格式数据
out.flush();
out.close();
}
static class LoginMessage {
public String mes;
public boolean error;
}
