/*
To compile on i5.nyu.edu (Solaris) we needed the socket library and the
network services library:

g++ browser.C -lsocket -lnsl
*/

#include <iostream>
#include <cstdlib>
#include <string>	//for class string
#include <string.h>	//for memcpy
#include <strings.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>	//for gethostbyname
#include <unistd.h>
using namespace std;

extern int h_errno;

int main(int argc, char **argv)
{
	//IP address 74.125.226.148
	const string hostname = "www.google.com";

	//HTTP GET command to send to the above host
	const string get = "GET /finance/option_chain?q=NYSEARCA:SPY\n";

	const struct hostent *const p = gethostbyname(hostname.c_str());
	if (p == 0) {
		cerr << argv[0] << ": gethostbyname error number " << h_errno
			<< "\n";
		return 1;
	}

	struct sockaddr_in address;
	bzero(reinterpret_cast<char *>(&address), sizeof address);
	memcpy(&address.sin_addr, p->h_addr_list[0], p->h_length);
	address.sin_family = AF_INET;
	address.sin_port = htons(80);

	const int s = socket(AF_INET, SOCK_STREAM, 0);
	if (s < 0) {
		perror(argv[0]);
		return 2;
	}

	char buffer[INET6_ADDRSTRLEN];
	if (inet_ntop(AF_INET, &address.sin_addr, buffer, sizeof buffer) == 0) {
		perror(argv[0]);
		return 3;
	}
	cout << "Trying " << buffer << "...\n";

	if (connect(s, reinterpret_cast<struct sockaddr *>(&address),
		sizeof address) != 0) {
		perror(argv[0]);
		return 4;
	}

	cout << "Connected to " << hostname << ".\n";

	for (string::size_type i = 0; i < get.size(); ++i) {
		if (write(s, &get[i], 1) != 1) {
			cerr << argv[0] << ": error writing to server\n";
			return 5;
		}
	}

	char c;
	while (read(s, &c, 1) == 1) {
		cout << c;
	}

	if (shutdown(s, SHUT_RDWR) != 0) {  //shutdown read and write
		perror(argv[0]);
		return 6;
	}

	return EXIT_SUCCESS;
}