纯C++的Socket访问Http封装类

#include "stdafx.h"
#include <iostream>
#include <string>
#include "http/request.h"

using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
Request myRequest;      //初始化类
string sHeaderSend;     //定义http头
string sHeaderReceive;  //返回头
string sMessage="";     //返回页面内容
bool IsPost=false;  //是否Post提交

int i =myRequest.SendRequest(IsPost, "http://neeao.com", sHeaderSend,
sHeaderReceive, sMessage);
if (i)
{
cout<<"Http头:"<<endl;
cout<< sHeaderSend <<endl;
cout<<"响应头"<<endl;
cout<< sHeaderReceive <<endl;
cout<<"网页内容"<<endl;
cout<< sMessage <<endl;
}else
{
cout<<"网络不可到达"<<endl;
}
system("pause");
return 0;
}

//******************************************
//纯C++的socket访问Http封装类，Neeao修改
//http://neeao.com
//2009-08-25
//******************************************

#if !defined(AFX_REQUEST_H__9F2C9BB6_CBA7_40AF_80A4_09A1CE1CE220__INCLUDED_)
#define AFX_REQUEST_H__9F2C9BB6_CBA7_40AF_80A4_09A1CE1CE220__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock2.h>
#pragma comment(lib, "WS2_32")

using namespace std;
#define MEM_BUFFER_SIZE 10

/*
HTTPRequest: Structure that returns the HTTP headers and message
from the request
*/
typedef struct
{
LPSTR headerSend;                               // Pointer to HTTP header Send
LPSTR headerReceive;                            // Pointer to HTTP headers Receive
LPSTR message;                                  // Pointer to the HTTP message
long messageLength;                             // Length of the message
} HTTPRequest;

/*
MemBuffer:  Structure used to implement a memory buffer, which is a
buffer of memory that will grow to hold variable sized
parts of the HTTP message.
*/
typedef struct
{
unsigned    char *buffer;
unsigned    char *position;
size_t      size;
} MemBuffer;

class Request
{
public:
Request();
virtual ~Request();

private:
void        MemBufferCreate(MemBuffer *b);
void        MemBufferGrow(MemBuffer *b);
void        MemBufferAddByte(MemBuffer *b, unsigned char byt);
void        MemBufferAddBuffer(MemBuffer *b, unsigned char *buffer, size_t size);
DWORD       GetHostAddress(LPCSTR host);
void        SendString(SOCKET sock,LPCSTR str);
BOOL        ValidHostChar(char ch);
void        ParseURL(string url,LPSTR protocol,int lprotocol, LPSTR host,int lhost,LPSTR request,int lrequest,int *port);

int         SendHTTP(string url,LPCSTR headerReceive,BYTE *post, DWORD postLength,HTTPRequest *req);

public:
int     SendRequest(bool IsPost, string url, string& psHeaderSend, string& pszHeaderReceive,string& pszMessage);
};

#endif // !defined(AFX_REQUEST_H__9F2C9BB6_CBA7_40AF_80A4_09A1CE1CE220__INCLUDED_)
Request.cpp

//******************************************
//纯C++的Socket访问Http封装类，Neeao修改
//http://neeao.com
//2009-08-25
//******************************************

#include "stdafx.h"
#include "Request.h"
#include <string>
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

Request::Request()
{

}

Request::~Request()
{

}

//*******************************************************************************************************
//MemBufferCreate:
//                  Passed a MemBuffer structure, will allocate a memory buffer
//                   of MEM_BUFFER_SIZE.  This buffer can then grow as needed.
//*******************************************************************************************************
void Request::MemBufferCreate(MemBuffer *b)
{
b->size = MEM_BUFFER_SIZE;
b->buffer =(unsigned    char *) malloc( b->size );
b->position = b->buffer;
}

//*******************************************************************************************************
// MemBufferGrow:
//                  Double the size of the buffer that was passed to this function.
//*******************************************************************************************************
void Request::MemBufferGrow(MemBuffer *b)
{
size_t sz;
sz = b->position - b->buffer;
b->size = b->size *2;
b->buffer =(unsigned    char *) realloc(b->buffer,b->size);
b->position = b->buffer + sz;   // readjust current position
}

//*******************************************************************************************************
// MemBufferAddByte:
//                  Add a single byte to the memory buffer, grow if needed.
//*******************************************************************************************************
void Request::MemBufferAddByte(MemBuffer *b,unsigned char byt)
{
if( (size_t)(b->position-b->buffer) >= b->size )
MemBufferGrow(b);

*(b->position++) = byt;
}

//*******************************************************************************************************
// MemBufferAddBuffer:
//                  Add a range of bytes to the memory buffer, grow if needed.
//*******************************************************************************************************
void Request::MemBufferAddBuffer(MemBuffer *b,
unsigned char *buffer, size_t size)
{
while( ((size_t)(b->position-b->buffer)+size) >= b->size )
MemBufferGrow(b);

memcpy(b->position,buffer,size);
b->position+=size;
}

//*******************************************************************************************************
// GetHostAddress:
//                  Resolve using DNS or similar(WINS,etc) the IP
//                   address for a domain name such as www.wdj.com.
//*******************************************************************************************************
DWORD Request::GetHostAddress(LPCSTR host)
{
struct hostent *phe;
char *p;

phe = gethostbyname( host );

if(phe==NULL)
return 0;

p = *phe->h_addr_list;
return *((DWORD*)p);
}

//*******************************************************************************************************
// SendString:
//                  Send a string(null terminated) over the specified socket.
//*******************************************************************************************************
void Request::SendString(SOCKET sock,LPCSTR str)
{
send(sock,str,strlen(str),0);
}

//*******************************************************************************************************
// ValidHostChar:
//                  Return TRUE if the specified character is valid
//                      for a host name, i.e. A-Z or 0-9 or -.:
//*******************************************************************************************************
BOOL Request::ValidHostChar(char ch)
{
return( isalpha(ch) || isdigit(ch)
|| ch=='-' || ch=='.' || ch==':' );
}

//*******************************************************************************************************
// ParseURL:
//                  Used to break apart a URL such as
//                      http://www.localhost.com:80/TestPost.htm into protocol, port, host and request.
//*******************************************************************************************************
void Request::ParseURL(string url,LPSTR protocol,int lprotocol,LPSTR host,int lhost,LPSTR request,int lrequest,int *port)
{
char *work,*ptr,*ptr2;

*protocol = *host = *request = 0;
*port=80;

work = strdup(url.c_str());
strupr(work);

ptr = strchr(work,':');                         // find protocol if any
if(ptr!=NULL)
{
*(ptr++) = 0;
lstrcpyn(protocol,work,lprotocol);
}
else
{
lstrcpyn(protocol,"HTTP",lprotocol);
ptr = work;
}

if( (*ptr=='/') && (*(ptr+1)=='/') )            // skip past opening /'s
ptr+=2;

ptr2 = ptr;                                     // find host
while( ValidHostChar(*ptr2) && *ptr2 )
ptr2++;

*ptr2=0;
lstrcpyn(host,ptr,lhost);

lstrcpyn(request,url.c_str() + (ptr2-work),lrequest);   // find the request

ptr = strchr(host,':');                         // find the port number, if any
if(ptr!=NULL)
{
*ptr=0;
*port = atoi(ptr+1);
}

free(work);
}

//*******************************************************************************************************
// SendHTTP:
//                  Main entry point for this code.
//                    url           - The URL to GET/POST to/from.
//                    headerSend        - Headers to be sent to the server.
//                    post          - Data to be posted to the server, NULL if GET.
//                    postLength    - Length of data to post.
//                    req           - Contains the message and headerSend sent by the server.
//
//                    returns 1 on failure, 0 on success.
//*******************************************************************************************************
int Request::SendHTTP(string url,LPCSTR headerReceive,BYTE *post,
DWORD postLength,HTTPRequest *req)
{
WSADATA         WsaData;
SOCKADDR_IN     sin;
SOCKET          sock;
char            buffer[512];
char            protocol[20],host[256],request[1024];
int             l,port,chars,err;
MemBuffer       headersBuffer,messageBuffer;
char            headerSend[1024];
BOOL            done;

ParseURL(url,protocol,sizeof(protocol),host,sizeof(host),       // Parse the URL
request,sizeof(request),&port);
if(strcmp(protocol,"HTTP"))
return 1;

err = WSAStartup (0x0101, &WsaData);                            // Init Winsock
if(err!=0)
return 1;

sock = socket (AF_INET, SOCK_STREAM, 0);
//if (socket == INVALID_SOCKET)
if (sock == INVALID_SOCKET)
{
return 1;
}

sin.sin_family = AF_INET;                                       //Connect to web sever
sin.sin_port = htons( (unsigned short)port );
sin.sin_addr.s_addr = GetHostAddress(host);

if( connect (sock,(LPSOCKADDR)&sin, sizeof(SOCKADDR_IN) ) )
{

return 1;
}

if( !*request )
lstrcpyn(request,"/",sizeof(request));

if( post == NULL )
{
SendString(sock,"GET ");
strcpy(headerSend, "GET ");
}
else
{
SendString(sock,"POST ");
strcpy(headerSend, "POST ");
}
SendString(sock,request);
strcat(headerSend, request);

SendString(sock," HTTP/1.0/r/n");
strcat(headerSend, " HTTP/1.0/r/n");

SendString(sock,"Accept: image/gif, image/x-xbitmap,"
" image/jpeg, image/pjpeg, application/vnd.ms-excel,"
" application/msword, application/vnd.ms-powerpoint,"
" */*/r/n");
strcat(headerSend, "Accept: image/gif, image/x-xbitmap,"
" image/jpeg, image/pjpeg, application/vnd.ms-excel,"
" application/msword, application/vnd.ms-powerpoint,"
" */*/r/n");

SendString(sock,"Accept-Language: en-us/r/n");
strcat(headerSend, "Accept-Language: en-us/r/n");

SendString(sock,"Accept-Encoding: gzip, default/r/n");
strcat(headerSend, "Accept-Encoding: gzip, default/r/n");

SendString(sock,"User-Agent: Neeao/4.0/r/n");
strcat(headerSend, "User-Agent: Neeao/4.0/r/n");

if(postLength)
{
sprintf(buffer,"Content-Length: %ld/r/n",postLength);
SendString(sock,buffer);
strcat(headerSend, buffer);
}
//SendString(sock,"Cookie: mycookie=blablabla/r/n");
//  printf("Cookie: mycookie=blablabla/r/n");
SendString(sock,"Host: ");
strcat(headerSend, "Host: ");

SendString(sock,host);
strcat(headerSend, host);

SendString(sock,"/r/n");
strcat(headerSend, "/r/n");

if( (headerReceive!=NULL) && *headerReceive )
{
SendString(sock,headerReceive);
strcat(headerSend, headerReceive);
}

SendString(sock,"/r/n");                                // Send a blank line to signal end of HTTP headerReceive
strcat(headerSend, "/r/n");

if( (post!=NULL) && postLength )
{
send(sock,(const char*)post,postLength,0);
post[postLength]    = '/0';

strcat(headerSend, (const char*)post);
}

//strcpy(req->headerSend, headerSend);
req->headerSend     = (char*) malloc( sizeof(char*) * strlen(headerSend));
strcpy(req->headerSend, (char*) headerSend );

MemBufferCreate(&headersBuffer );
chars = 0;
done = FALSE;

while(!done)
{
l = recv(sock,buffer,1,0);
if(l<0)
done=TRUE;

switch(*buffer)
{
case '/r':
break;
case '/n':
if(chars==0)
done = TRUE;
chars=0;
break;
default:
chars++;
break;
}

MemBufferAddByte(&headersBuffer,*buffer);
}

req->headerReceive  = (char*) headersBuffer.buffer;
*(headersBuffer.position) = 0;

MemBufferCreate(&messageBuffer);                            // Now read the HTTP body

do
{
l = recv(sock,buffer,sizeof(buffer)-1,0);
if(l<0)
break;
*(buffer+l)=0;
MemBufferAddBuffer(&messageBuffer, (unsigned char*)&buffer, l);
} while(l>0);
*messageBuffer.position = 0;
req->message = (char*) messageBuffer.buffer;
req->messageLength = (messageBuffer.position - messageBuffer.buffer);

closesocket(sock);                                          // Cleanup

return 0;
}

//*******************************************************************************************************
// SendRequest
//
//*******************************************************************************************************
int Request::SendRequest(bool IsPost, string url, string& psHeaderSend, string& psHeaderReceive, string& psMessage)
{
HTTPRequest         req;
int                 i,rtn;
LPSTR               buffer;

req.headerSend                          = NULL;
req.headerReceive                       = NULL;
req.message                             = NULL;

//Read in arguments

if(IsPost)
{                                                   /* POST */
i       = psHeaderSend.length();
buffer  = (char*) malloc(i+1);
strcpy(buffer, psHeaderSend.c_str());

rtn             = SendHTTP( url,
"Content-Type: application/x-www-form-urlencoded/r/n",
(unsigned char*)buffer,
i,
&req);

free(buffer);
}
else/* GET */
{
rtn = SendHTTP(url,NULL,NULL,0,&req);
}

if(!rtn)                                            //Output message and/or headerSend
{
psHeaderSend        = req.headerSend;
psHeaderReceive     = req.headerReceive;
psMessage           = req.message;

free(req.headerSend);
free(req.headerReceive);
free(req.message);
return 1;
}
else
{
return 0;
}
}