小编Iva*_*mov的帖子

我正在尝试使用asmack库在Android上实现一个简单的jabber messenger.这是代码:

public boolean login()
{
    if (connection != null && connection.isConnected())
    {
        Log.i("XMPP", connection.getHost());
        try 
        {
            connection.login(USERNAME, PASSWORD);
        } 
        catch (XMPPException e) 
        {
            e.printStackTrace();
            return false;
        }
        return true;
    }
    return false;
}

我在connection.login()之后得到的异常(连接看起来很好):

service-unavailable(503)
at org.jivesoftware.smack.NonSASLAuthentication.authenticate(NonSASLAuthentication.java:77)
at org.jivesoftware.smack.XMPPConnection.login(XMPPConnection.java:239)
at org.jivesoftware.smack.Connection.login(Connection.java:353)
at com.someapp.networking.XMPPMessenger.login(XMPPMessenger.java:60)
at com.someapp.XMPPService.onCreate(XMPPService.java:33)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:2780)
at android.app.ActivityThread.access$3200(ActivityThread.java:119)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1917)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4363)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
at dalvik.system.NativeStart.main(Native Method)

可能是什么错误？

我正在尝试使用Pyramid和socket.io框架创建一个简单的WebSocket应用程序.服务器端代码:

from pyramid.response import Response
from pyramid_socketio.io import SocketIOContext, socketio_manage
import gevent

def includeme(config):
    '''
    This method is called on the application startup.
    '''
    config.add_route('socket.io', 'socket.io/*remaining')

class ConnectIOContext(SocketIOContext):
    # self.io is the Socket.IO socket
    # self.request is the request
    def msg_connect(self, msg):
        print "Connect message received", msg
        self.msg("connected", hello="world")

# Socket.IO implementation
@view_config(route_name="socket.io")
def socketio_service(request):
    print "Socket.IO request running"
    print request
    retval = socketio_manage(ConnectIOContext(request))
    return Response(retval)

客户代码:

<script>
    var socket = null;
    $(document).ready(function() {
        socket = new io.Socket(null, null);
        socket.on('connect', …

我需要创建一个后台进程,它将等待传入的命令并执行它们.这是代码:

instance_tuple.popen = subprocess.Popen(['python',\
                                    os.path.join(config['scripts_dir'],\
                                    'instance_script.py')],\
                                    stdin = subprocess.PIPE,\
                                    stdout = subprocess.PIPE)

处理功能代码:

if __name__ == '__main__':
    config = dict()
    is_config_valid = False
    print 'Hello from instance process'
    while True:
        cmd_str = raw_input()
        if (cmd_str.strip() != ''):
            print 'received %s' % cmd_str
            command = json.loads(cmd_str)
        print 'received command: %s' % str(command)
        sys.stdout.flush()
        if command['name'] == 'set_variable':
            name = command['args'][0]
            value = command['args'][1]
            config[name] = value
            is_config_valid = validate_instance_dict(config)            
        elif is_config_valid:
            if (command['name'] == 'init_model'):
                config['instance'].init_model()
            elif (command['name'] == 'get_tree'):
                tree …

使用0mq在进程之间建立双向通信的最正确方法是什么？我需要创建几个后台进程,它们将等待来自主进程的命令,执行一些计算并将结果返回给主进程.

我正在尝试使用Pyramid框架实现电子邮件确认.这是在数据库中确认用户并将其重定向到主页的代码.

   user = DbSession.query(User).filter_by(email=email).one()     
   if user.approved:
       return {'msg': _('Already approved')}        
   if user.check_approve_token(hash):
       user.approved = True
       self.request.session.save()
       self.request.session['user'] = user
       return HTTPFound(self.request.route_url('home'),
                            headers=remember(self.request, user.guid))

当我尝试self.request.session['user']从另一个处理程序获取变量时,我得到一个DetachedInstanceError: Instance <User at 0x42902f0> is not bound to a Session; attribute refresh operation cannot proceed.据我所知,由于User实例的修改,引发了这个错误.我该如何解决？

提前谢谢,伊万.

在android中使用XML-RPC的最简单方法是什么？我尝试了http://code.google.com/p/android-xmlrpc/,但它没有编译,看起来已经放弃了.

你能告诉我我的类构造函数有什么问题吗？码:

CVector::CVector (int size_)
{
    if (size_ > 0)
    {
        this->size = size_;
        this->data = new double[size];
        for (int i = 0; i < size; i++)
        { 
            (*this)(i) = i;
        }
     }
     cout << "constructor end" << endl;
     return;
}

用法示例:

tvector = CVector(6);

"constructor end"输出后我收到访问冲突.

更新:构造函数调用不正确.运用

CVector tvector(6); 工作.