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client.cpp
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client.cpp
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#include "client.h"
Client::Client()
{
socket=new QTcpSocket;
timeout=3000;
}
void Client::setTimeout(int timeout)
{
this->timeout=timeout;
}
int Client::getTimeout()
{
return timeout;
}
bool Client::connect(QString host, int port)
{
socket->connectToHost(host,port);
if(!socket->waitForConnected(timeout))
{
return false;
}
return true;
}
bool Client::disconnect()
{
socket->disconnectFromHost();
return true;
}
int Client::getErrorCode()
{
return socket->error();
}
QString Client::getErrorString()
{
return socket->errorString();
}
QStringList Client::query(QString cmd)
{
QStringList response;
if(sendRequest(cmd))
{
response=readResponse();
}
return response;
}
bool Client::sendRequest(QString cmd)
{
QTextStream stream(socket);
QString test=cmd;
int k;
QChar c,next;
QStringList parts;
QString buffer="";
bool open=false;
for(k=0;k<test.length();k++)
{
c=test.at(k);
if(open)
{
next=k<test.length()-1?test.at(k+1):' ';
if(c=='\\'&&next=='"'){
buffer+='"';
k++;
}
else if(c=='"')
open=false;
else
buffer+=c;
}else{
if(!c.isSpace()){
if(c=='"')
open=true;
else
buffer+=c;
}else if(!buffer.isEmpty()){
parts<<buffer;
buffer="";
}
}
}
if(!buffer.isEmpty()){
parts<<buffer;
}
QString bin="";
bin.append(QString("*%1\r\n").arg(parts.length()));
int i;
for(i=0;i<parts.length();i++)
{
bin.append(QString("$%1\r\n").arg(parts.at(i).length()));
bin.append(QString("%1\r\n").arg(parts.at(i)));
}
stream<<bin;
stream.flush();
if (!socket->waitForReadyRead(timeout)) {
return false;
}
return true;
}
QStringList Client::readResponse()
{
QString reply="";
while(socket->canReadLine())
reply.append(socket->readLine());
QChar first=reply.at(0);
QString type,value;
QStringList result;
if(first=='+'){
type="string";
value=reply.mid(1);
value.chop(2);
result<<type<<value;
}else if(first=='-'){
type="error";
value=reply.mid(1);
value.chop(2);
result<<type<<value;
}else if(first==':'){
type="integer";
value=reply.mid(1);
value.chop(2);
result<<type<<value;
}else if(first=='$'){
type="bulk";
int index=reply.indexOf("\r\n");
int len=reply.mid(1,index-1).toInt();
if(len==-1)
value="NULL";
else
value=reply.mid(index+2,len);
result<<type<<value;
}else if(first=='*'){
type="list";
int index=reply.indexOf("\r\n");
int count=reply.mid(1,index-1).toInt();
int i;
int len;
int pos=index+2;
result<<type;
for(i=0;i<count;i++)
{
index=reply.indexOf("\r\n",pos);
len=reply.mid(pos+1,index-pos-1).toInt();
if(len==-1)
result<<"NULL";
else
result<<reply.mid(index+2,len);
pos=index+2+len+2;
}
}
return result;
}
bool Client::isConnected()
{
return socket->state()==QTcpSocket::ConnectedState;
}