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/*
* Copyright (C) 2008 plutech
*/

#include "CNet.h"

CNet* CNet::singleton = NULL;

int CNet::connection(char* server_name,int port)
{
struct sockaddr_in serverSockAddr;
struct hostent *serverHostEnt;
memset(&serverSockAddr,0,sizeof(serverSockAddr));
serverHostEnt = gethostbyname(server_name);
if (serverHostEnt == NULL)
{
printf("Unable to look up server : %s\n",server_name);
return -1;
}
memcpy(&serverSockAddr.sin_addr,serverHostEnt->h_addr,serverHostEnt->h_length);
serverSockAddr.sin_port = htons(port);
serverSockAddr.sin_family = AF_INET;

sock = socket(AF_INET,SOCK_STREAM,0);
if (sock<0)
{
printf("Socket creation failed\n");
return -1;
}
if(connect(sock,(struct sockaddr *)&serverSockAddr,sizeof(serverSockAddr))<0)
{
printf("Connection to server failed\n");
return -1;
}
return 1;
}

void CNet::send_p(char* packet)
{
int n = send (sock, packet, sizeof (*packet), 0);
}

char* CNet::recv_p(SOCKET sock)
{
char text[1500]; //mtu max
int n = recv (sock, text, sizeof text - 1, 0);
if(n == -1)
{
closesocket(sock);
return "crash";
}
text[n] = 0;
return text;
}

int CNet::poschaine(char *chaine1, char *chaine2, int depart){
unsigned int i,j;
for( i = depart; i < strlen(chaine1); i++)
{
if(chaine1[i] == chaine2[0])
{
int rate = 0;
for(j = 0; j < strlen(chaine2); j++)if( chaine1[i+j] != chaine2[j])
rate=1;
if(rate == 0)return i;
}
}
return -1;
}

int CNet::hextoint2(char *hex)
{
if(strlen(hex)>0)
{
if(hex[0]>'0'&&hex[0]<='9')
return hextoint2(hex+1)*16+hex[0]-'0';
else if(hex[0]>='a'&&hex[0]<='f')
return hextoint2(hex+1)*16+hex[0]-'a'+ 10;
else if(hex[0]>='A'&&hex[0]<='F')
return hextoint2(hex+1)*16+hex[0]-'A'+ 10;
else return hextoint2(hex+1)*16;
}
else return 0;
}
int CNet::hextoint(char *hex)
{
char *temp = (char*)malloc(strlen(hex));
unsigned int i;
for(i=0;i<strlen(hex);i++)
temp[i]=hex[strlen(hex)-i-1];
return hextoint2(temp);
}

int CNet::InitNetwork()
{
#if defined WIN32
WSADATA wsa;
WSAStartup(MAKEWORD(2,0),&wsa);
#endif
return 0;
}

int CNet::CloseNetwork()
{
#if defined WIN32
WSACleanup();
#endif
return 0;
}

CHttp::CHttp()
{
InitNetwork();
}
CHttp::~CHttp()
{
CloseNetwork();
delete data;
}

char *CHttp::chunked_decode(char *buffer)
{
char *buf = (char*)malloc(256*256);
unsigned int i=0,j,k=0;
while(i<strlen(buffer))
{
char hex[5];
unsigned int size;
sscanf(buffer+i,"%s",hex);
size = hextoint(hex);
i+=strlen(hex)+2;
for(j=0;j<size;j++)
{
buf[k] = buffer[i+j];
k++;
}
i+=size+2;
}
buf[k]='\0';
return buf;
}

void CHttp::read_commande(char *buffer)
{
if(poschaine(buffer,"HTTP/1.1",0)>-1)
{
int num;
sscanf(buffer,"HTTP/1.1 %d",&num);
status = num;
}
else if(poschaine(buffer,"Transfer-Encoding",0)>-1)
{
if(poschaine(buffer,"chunked",0)>-1)
encoding = chunked;
else encoding = normal;
}
}

int CHttp::read_header(char *buffer)
{
unsigned int i=0,j;
while(i<strlen(buffer))
{
char *buf = (char*)malloc(256);
for(j=0;buffer[i+j]!='\r'||buffer[i+j+1]!='\n';j++)
buf[j] = buffer[i+j];
buf[j]='\0';
read_commande(buf);
i+=j+2;
if(strlen(buf)==0)
break;
}
return i;
}

void CHttp::save(char *filename)
{
// Not needed for actual enginer
}

void CHttp::load(char* adress)
{
char* host;
char str[1024];
strcpy(str,adress);
char* file;
if (strstr(adress, "http://") != NULL){
strtok(str,"/");
host = strtok(NULL,"/");
file = strtok(NULL," /");
}
else{
host = strtok(str," /");
file = strtok(NULL," /");
}
cout << host << endl;
cout << file << endl;
char commande[500];
char *buffer = (char*)malloc(256*256);
char buf[BUFSIZE];
int lu;
connection(host,80);
sprintf(commande,"GET /%s HTTP/1.1\r\nHost: %s\r\nAccept: */*\r\n\r\n",file,host);
send(sock,commande,strlen(commande)+1,0);
int pos=0;
do
{
lu=recv(sock,&(buf[0]),BUFSIZE,0);
strncpy(&(buffer[pos]),&(buf[0]),lu);
pos+=lu;
} while(lu>0);
data = new char[strlen(buffer)+1];
strcpy(data,buffer);
shutdown(sock,2);
closesocket(sock);
}

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/*
* Copyright (C) 2008 plutech
*/

#ifndef _CNET_H_
#define _CNET_H_

#include <string>

#if defined (WIN32)
#include <winsock2.h>
#elif defined (linux)
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <unistd.h>
#define INVALID_SOCKET -1
#define SOCKET_ERROR -1
#define closesocket(s) close (s)
typedef int SOCKET;
typedef struct sockaddr_in SOCKADDR_IN;
typedef struct sockaddr SOCKADDR;
#endif

#define BUFSIZE 1024

#define normal 0
#define chunked 1

class CNet{

public:

// ---------------------------------------------------------
// Network method
// ---------------------------------------------------------

void send_p(char* packet);

char* recv_p(SOCKET sock);

int InitNetwork();

int CloseNetwork();

int connection(char* adr, int port);

int poschaine(char *chaine1, char *chaine2, int depart);

int hextoint2(char *hex);

int hextoint(char *hex);

int status;

int encoding;

void CloseCNet()
{
delete log;
}

static CNet* GetSingleton()
{
if(singleton == NULL)
{
singleton = new CNet;
singleton->InitNetwork();
}
return singleton;
}

SOCKET sock;

private:

// ---------------------------------------------------------
// Variable private in class
// ---------------------------------------------------------

CLogger* log;
static CNet* singleton;
};

class CHttp : public CNet{

public:

CHttp();
~CHttp();
int read_header(char *buffer);
void read_commande(char *buffer);
void load(char* adress);
char *chunked_decode(char *buffer);
void save(char *filename);
char* GetData()
{
return data;
}

void FreeMemory()
{
delete data;
}

char* data;

};

#endif

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#include <iostream>

using namespace std;

int main(void)
{
CHttp *chttp = new CHttp;
/// Chargment du fichier
chttp->load("Unable to look up server : %s\n");
/// On affiche le ficher en récupérant les données
cout << chttp->GetData() << endl;
/// On ferme le réseau
delete chttp;
}