qt调用simsimi api实现小黄鸡

//使用www.xiaohuangji.com进行post
void xiaojianji::on_pushButton_clicked()
{
    QString str = ui->lineEdit->text();  
    ui->textEdit->append("我 :" + str+"\n");   //在textedit显示消息
    ui->lineEdit->clear();    //发送后清除linedit的文字
    QTextCodec *utf8 = QTextCodec::codecForName("utf-8");    
    QByteArray msg = "para=" + utf8->fromUnicode(str).toPercentEncoding();   //最后post msg
    QNetworkRequest request;      
    request.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");  //header
    request.setHeader(QNetworkRequest::ContentLengthHeader,msg.length());  
    request.setUrl(QUrl("http://www.xiaohuangji.com/ajax.php"));
    QNetworkReply *reply  = manager->post(request,msg);  //进行post 
}

void xiaojianji::replyFinished(QNetworkReply *reply)
{
  if(reply->error() == QNetworkReply::NoError)
  {
      QString out(reply->readAll());  //接受post后的数据
      ui->textEdit->append("小贱鸡 :" + out + "\n");  //在textedit显示
  }else{
      ui->textEdit->append("小贱鸡 : 好像出了点问题...\n");
  }
}