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web.cpp
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web.cpp
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// Edited by: Nicholas Gardner
// cs335
// lab3
// source:
// http://coding.debuntu.org/c-linux-socket-programming-tcp-simple-http-client
#include "web.h"
using namespace std;
string Web::Score(char* name,
int score,
int shots,
int hits,
int ticks,
int streak)
{
char nameSend[32];
strcpy(nameSend, name);
for (unsigned int i = 0; i < strlen(name); i++) {
if (nameSend[i] == 32)
nameSend[i] = 43;
}
char buf[5][16];
sprintf(buf[0],"%d",score);
sprintf(buf[1],"%d",shots);
sprintf(buf[2],"%d",hits);
sprintf(buf[3],"%d",ticks);
sprintf(buf[4],"%d",streak);
string host = "www.cs.csubak.edu";
string page = "~ngardner/fps/score.php?name=" + string(nameSend) +
"&kills=" + string(buf[0]) +
"&shots=" + string(buf[1]) +
"&hits=" + string(buf[2]) +
"&ticks=" + string(buf[3]) +
"&streak=" + string(buf[4]);
string ret = HttpConnect(host.c_str(), page.c_str());
if (ret.compare("na") == 0 || ret.find("404 Not Found") != ret.npos) {
ret = "Leaderboards not available.,Kills: " + string(buf[0]);
}
return ret;
}
string Web::HttpConnect(const char *host, const char *page)
{
string s = "";
string na = "na";
struct sockaddr_in *remote;
int sock;
int tmpres;
char *ip;
char *get;
char buf[BUFSIZ+1];
sock = create_tcp_socket();
ip = get_ip(host);
if (ip == NULL)
return na;
remote = (struct sockaddr_in *)malloc(sizeof(struct sockaddr_in *));
remote->sin_family = AF_INET;
tmpres = inet_pton(AF_INET, ip, (void *)(&(remote->sin_addr.s_addr)));
if ( tmpres < 0) {
return na;
//perror("Can't set remote->sin_addr.s_addr");
//exit(1);
} else if (tmpres == 0) {
return na;
//fprintf(stderr, "%s is not a valid IP address\n", ip);
//exit(1);
}
remote->sin_port = htons(PORT);
if (connect(sock, (struct sockaddr *)remote, sizeof(struct sockaddr)) < 0) {
return na;
//perror("Could not connect");
//exit(1);
}
get = build_get_query(host, page);
//fprintf(stderr, "Query is:\n<<START>>\n%s<<END>>\n", get);
//Send the query to the server
unsigned int sent = 0;
while (sent < strlen(get)) {
tmpres = send(sock, get+sent, strlen(get)-sent, 0);
if (tmpres == -1) {
return na;
//perror("Can't send query");
//exit(1);
}
sent += tmpres;
}
//now it is time to receive the page
memset(buf, 0, sizeof(buf));
int htmlstart = 0;
char * htmlcontent;
while ((tmpres = recv(sock, buf, BUFSIZ, 0)) > 0) {
if (htmlstart == 0) {
/* Under certain conditions this will not work.
* If the \r\n\r\n part is splitted into two messages
* it will fail to detect the beginning of HTML content
*/
htmlcontent = strstr(buf, "\r\n\r\n");
if (htmlcontent != NULL) {
htmlstart = 1;
htmlcontent += 4;
}
} else {
htmlcontent = buf;
}
if (htmlstart) {
// changed fprintf to printf
//printf("%s", htmlcontent);
s = htmlcontent;
}
memset(buf, 0, tmpres);
}
if (tmpres < 0) {
return na;
//perror("Error receiving data");
}
free(get);
free(remote);
free(ip);
close(sock);
return s;
}
int Web::create_tcp_socket()
{
int sock;
if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
//perror("Can't create TCP socket");
//exit(1);
}
return sock;
}
char *Web::get_ip(const char *host)
{
struct hostent *hent;
int iplen = 20; //XXX.XXX.XXX.XXX
char *ip = (char *)malloc(iplen+1);
memset(ip, 0, iplen+1);
if ((hent = gethostbyname(host)) == NULL) {
//herror("Can't get IP");
//exit(1);
return NULL;
}
if (inet_ntop(AF_INET, (void *)hent->h_addr_list[0], ip, iplen) == NULL) {
//perror("Can't resolve host!");
//exit(1);
return NULL;
}
return ip;
}
//const char
char *Web::build_get_query(const char *host, const char *page)
{
char *query;
// const char
const char *getpage = page;
const char *tpl = "GET /%s HTTP/1.0\r\nHost: %s\r\nUser-Agent: %s\r\n\r\n";
if (getpage[0] == '/') {
getpage = getpage + 1;
}
// -5 is to consider the %s %s %s in tpl and the ending \0
query = (char *)malloc(strlen(host)+strlen(getpage)
+strlen(USERAGENT)+strlen(tpl)-5);
sprintf(query, tpl, getpage, host, USERAGENT);
return query;
}