QT版的POP3协议实现

来源：互联网发布：64位软件编辑：程序博客网时间：2024/05/22 08:02

http://www.oschina.net/code/snippet_188882_32619#46915

最近公司的需要，做了一个QT版本的POP3协议实现，我感觉代码质量不是很好。希望大家帮忙看看，有哪些地方是可以改进的。

标签： Qt

代码片段(4)[全屏查看所有代码]

1. [文件] mailreceiver.h ~ 1KB 下载(27)

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#ifndef __MAIL_RECEIVER_H__
#define __MAIL_RECEIVER_H__
#include <QString>
#include <QTcpSocket>
 
classMailReceiver:publicQObject
{
    Q_OBJECT
public:
    structMailData
    {
        unsignedintindex;
        QString id;
        unsignedintsize;
    };
public:
    MailReceiver(QString server,unsigned shortport,QString username,QString password);
    ~MailReceiver(){};
 
    voidsetServer(QString server){m_server=server;}
    voidsetPort(unsigned shortport){m_port=port;}
    voidsetUsername(QString username){m_username=username;}
    voidsetPassword(QString password){m_password=password;}
 
    QString getServer(){returnm_server;}
    unsignedshortgetPort(){returnm_port;}
    QString getUsername(){returnm_username;}
    QString getPassword(){returnm_password;}
    boolgetConnected(){returnm_socket.state()==QAbstractSocket::ConnectedState;}
    boolgetLogin(){returnm_isLogin;}
 
    virtualbool connectToServer()=0;
    virtualbool login()=0;
    virtualbool logoff()=0;
    virtualbool list(std::vector<MailData> &result,unsigned intindex=0)=0;
    virtualbool retr(unsigned intindex,QString &result)=0;
protectedslots:
    virtualvoid socketDisconnected();
protected:
    QString m_server;
    unsignedshortm_port;
    QString m_username;
    QString m_password;
    QTcpSocket m_socket;
    boolm_isLogin;
};
#endif

2. [文件] mailreceiver.cpp ~ 434B 下载(19)

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#include "mailreceiver.h"
 
MailReceiver::MailReceiver(QString server,unsigned shortport,QString username,QString password)
:m_server(server),m_port(port),m_username(username),m_password(password),m_socket(NULL),m_isLogin(false)
{
    m_socket.setSocketOption(QAbstractSocket::LowDelayOption,1);
    connect(&m_socket,SIGNAL(disconnected()),this,SLOT(socketDisconnected()));
}
 
voidMailReceiver::socketDisconnected()
{
    m_isLogin=false;
}

3. [文件] pop3receiver.h ~ 461B 下载(19)

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#ifndef __POP3_RECEIVER_H__
#define __POP3_RECEIVER_H__
#include <vector>
#include "mailreceiver.h"
 
classPop3Receiver:publicMailReceiver
{
public:
    Pop3Receiver(QString server,unsigned shortport,QString username,QString password)
    :MailReceiver(server,port,username,password){}
 
    boolconnectToServer();
    boollogin();
    boollogoff();
    boollist(std::vector<MailData> &result,unsigned intindex=0);
    boolretr(unsigned intindex,QString &result);
};
#endif

4. [文件] pop3receiver.cpp ~ 5KB 下载(20)

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#include <cstring>
#include <cstdio>
#include <QtDebug>
#include <QRegExp>
#include "pop3receiver.h"
 
boolPop3Receiver::connectToServer()
{
    charbuffer[1024];
 
    m_socket.abort();
    m_socket.connectToHost(m_server,m_port);
 
    if(!m_socket.waitForConnected())
        returnfalse;
    if(!m_socket.waitForReadyRead() || !m_socket.canReadLine())
        returnfalse;
    memset(buffer,0,sizeof(buffer));
    m_socket.readLine(buffer,sizeof(buffer));
    if(buffer[0]!='+')
        returnfalse;
 
    returntrue;
}
 
boolPop3Receiver::login()
{
    charbuffer[1024];
 
    if(!getConnected() || m_isLogin)
        returnfalse;
     
    /*Send username*/
    memset(buffer,0,sizeof(buffer));
    sprintf(buffer,"USER %s\r\n",m_username.toAscii().data());
    m_socket.write(buffer);
    m_socket.flush();
    if(!m_socket.waitForReadyRead() || !m_socket.canReadLine())
        returnfalse;
    memset(buffer,0,sizeof(buffer));
    m_socket.readLine(buffer,sizeof(buffer));
    if(buffer[0]!='+')
        returnfalse;
 
    /*send password*/
    memset(buffer,0,sizeof(buffer));
    sprintf(buffer,"PASS %s\r\n",m_password.toAscii().data());
    m_socket.write(buffer);
    m_socket.flush();
    if(!m_socket.waitForReadyRead() || !m_socket.canReadLine())
        returnfalse;
    memset(buffer,0,sizeof(buffer));
    m_socket.readLine(buffer,sizeof(buffer));
    if(buffer[0]!='+')
        returnfalse;
 
    /*set isLogin*/
    m_isLogin=true;
     
    returntrue;
}
 
boolPop3Receiver::logoff()
{
    char buffer[1024];
     
    if(!getConnected())
        returnfalse;
 
    /*Sendquit command*/
    memset(buffer,0,sizeof(buffer));
    sprintf(buffer,"QUIT\r\n");
    m_socket.write(buffer);
    m_socket.flush();
    if(!m_socket.waitForReadyRead() || !m_socket.canReadLine())
        returnfalse;
    memset(buffer,0,sizeof(buffer));
    m_socket.readLine(buffer,sizeof(buffer));
    if(buffer[0]!='+')
        returnfalse;
 
    returntrue;
}
 
boolPop3Receiver::list(std::vector<MailData> &result,unsigned intindex)
{
    charbuffer[1024];
 
    if(!getConnected() || !m_isLogin)
        returnfalse;
     
    result.clear();
    if(index!=0)
    {
        memset(buffer,0,sizeof(buffer));   
        sprintf(buffer,"LIST %u\r\n",index);
        m_socket.write(buffer);
        m_socket.flush();
        if(!m_socket.waitForReadyRead() || !m_socket.canReadLine())
            returnfalse;
        memset(buffer,0,sizeof(buffer));
        m_socket.readLine(buffer,sizeof(buffer));
        if(buffer[0]!='+')
            returnfalse;
         
        MailData data;
        sscanf(buffer,"+OK %u %u",&data.index,&data.size);
        result.push_back(data);
    }
    else
    {
        memset(buffer,0,sizeof(buffer));   
        sprintf(buffer,"list\r\n");
        m_socket.write(buffer);
        m_socket.flush();
        if(!m_socket.waitForReadyRead())
            returnfalse;
        while(true)
        {
            memset(buffer,0,sizeof(buffer));   
 
            m_socket.waitForReadyRead(10);
            m_socket.readLine(buffer,sizeof(buffer));
            if(buffer[0]=='+')
            {
                /*
                if(!m_socket.waitForReadyRead())
                    break;
                else
                    continue;
                */
                continue;
            }
            elseif(buffer[0]=='-')
            {
                returnfalse;
            }
            elseif(buffer[0]=='.')
            {
                //qDebug("End of list");
                break;
            }
            else
            {
                MailData data;
                sscanf(buffer,"%u %u",&data.index,&data.size);
                result.push_back(data);
                //qDebug()<<data.index<<"\t"<<data.size;
            }
        }
    }
 
    for(std::vector<MailData>::iterator iter=result.begin();iter!=result.end();iter++)
    {
        memset(buffer,0,sizeof(buffer));   
        sprintf(buffer,"UIDL %u\r\n",iter->index);
        m_socket.write(buffer);
        m_socket.flush();
        if(!m_socket.waitForReadyRead() || !m_socket.canReadLine())
            continue;
        memset(buffer,0,sizeof(buffer));
        m_socket.readLine(buffer,sizeof(buffer));
        if(buffer[0]=='-')
        {
            //qDebug()<<"Error get UIDL:"<<buffer;
            continue;
        }
         
        QRegExp re("(\\d+)\\s(\\S*)\r\n");
        if(re.indexIn(buffer,0)!=-1 && (unsigned int)re.cap(1).toInt()==iter->index)
        {
                iter->id=re.cap(2); 
                //qDebug()<<iter->index<<"\t"<<iter->id;
        }
        else
        {
            //qDebug()<<"Get no id:"<<buffer;
        }
    }
 
    returntrue;
         
}
 
boolPop3Receiver::retr(unsigned intindex,QString &result)
{
    charbuffer[1024];
 
    if(!getConnected() || !m_isLogin)
        returnfalse;
 
    result.clear();
    memset(buffer,0,sizeof(buffer));
    sprintf(buffer,"RETR %u\r\n",index);
    m_socket.write(buffer);
    m_socket.flush();
    if(!m_socket.waitForReadyRead() || !m_socket.canReadLine())
        returnfalse;
    boolfirst=false;
    while(m_socket.canReadLine())
    {
        memset(buffer,0,sizeof(buffer));   
        m_socket.waitForReadyRead(5);
        m_socket.readLine(buffer,sizeof(buffer));
        //qDebug()<<buffer;
        if(!first && buffer[0]=='+')
        {
            /*
            if(!m_socket.waitForReadyRead())
                break;
            else
                continue;
            */
            first=true;
        }
        elseif(!first && buffer[0]=='-')
        {
            qDebug()<<"RETR Error:"<<buffer;
            first=true;
            returnfalse;
        }
        elseif(buffer[0]=='.')
        {
            //qDebug()<<"End of data";
            break;
        }
        else
        {
            result.append(buffer);
        }
    }
    returntrue;
}

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