Please Help! Socket Problem

[robsmith]

Hi.

I would like to make a c program that will be able to download a webpage, then save it the the harddisk, through using sockets.
For example, it will download a webpage onto the disk as an HTML file .

I am finding this very difficult,

I have found the following code, but when i compile it with gcc it comes up with about 20 errors

I would be grateful for any help at all

/**
 * This function sends the http headers to the specified server.  The result is then
 * copied into a passed buffer.
 *	lpszServer - The webserver address
 *	lpszHttp - The http request
 *	data - buffer to hold the html returned
 *	datasize - the size of the data buffer
 */

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

BOOL SendHttp(LPCTSTR lpszServer, LPCTSTR lpszHttp, LPTSTR data, UINT datasize)
{
	SOCKET s;
	WSADATA wsaData;
	struct sockaddr_in hostaddr;
	struct hostent *serverent;
	char *serverip;
	char buff[1024];
	int i,bytes;

	/* Initialize sockets */
	if(WSAStartup(MAKEWORD(2,2),&wsaData))
	{
		DisplayError("Error Initializing Sockets",GetLastError());
		return FALSE;
	}

	/* create a socket descriptor */
	s = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
	if(s == INVALID_SOCKET)
	{
		DisplayError("Error creating socket.",GetLastError());
		return FALSE;
	}

	/* Get a hostent structure from the domain name */
	if(!(serverent = gethostbyname(lpszServer)))
	{
		DisplayError("Could not resolve host name.",GetLastError());
		return FALSE;
	}

	/* Get the ip address from the hostent structure */
	if(!(serverip = inet_ntoa(*(struct in_addr *)*serverent->h_addr_list)))
	{
		DisplayError("Call to inet_ntoa failed",0);
		return FALSE;
	}

	memset(&hostaddr,0,sizeof(struct sockaddr_in));
	hostaddr.sin_family = AF_INET;
	hostaddr.sin_addr.s_addr = inet_addr(serverip);
	hostaddr.sin_port = htons(80);

	/* Connect to the server */
	if(connect(s,(struct sockaddr*)&hostaddr,sizeof(struct sockaddr)))
	{
		DisplayError("Unable to connect to server.",GetLastError());
		return FALSE;
	}

	/* Send the http headers */
	if(send(s,lpszHttp,strlen(lpszHttp),0) == SOCKET_ERROR)
	{
		DisplayError("Error Sending HTTP data.",GetLastError());
		return FALSE;
	}

	/* Receive a response */
	i = 0;
	while(1)
	{
		bytes = recv(s,buff,sizeof(buff),0);
		if(bytes <= 0) break;
		if( (bytes + i + 1) > datasize) break; /* dont overflow the buffer */
		memcpy(data + i, buff,bytes);
		i += bytes;
	}
	data[i] = 0;

	closesocket(s);

	return TRUE;
}

void DisplayError(LPCTSTR lpszError, int errornum)
{
	char szError[256];

	if(errno)
		sprintf(szError,"%s\n\nError Number: %d",lpszError,errornum);
	else
		sprintf(szError,"%s",lpszError);
	MessageBox(NULL,szError,"ERROR",MB_OK | MB_ICONERROR);
}

[Salem]

> I have found the following code, but when i compile it with gcc it comes up with about 20 errors
I'm not surprised - it begin by #including unix-style headers, and ends up calling microsoft winsock functions.

Also, saying "gcc" is your compiler isn't specific enough - there are many different ports for many different operating systems and processors. In short be specific.

Pasting a few error messages wouldn't go amiss either.

[kryptkat]

#include<window.h>


#include<winsock.h>