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EX_browser_qtvlist.c
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EX_browser_qtvlist.c
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/*
Copyright (C) 2010 ezQuake team
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the included (GNU.txt) GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "quakedef.h"
#include "utils.h"
#include "expat.h"
#include <curl/curl.h>
#define QTVLIST_CACHE_FILE_DIR "ezquake/sb/cache"
#define QTVLIST_CACHE_FILE "qtvcache"
#define CHARACTERDATA_BUFFERSIZE 256
#define MAX_QTV_ENTRY_TEXTLEN CHARACTERDATA_BUFFERSIZE
cvar_t sb_qtvlist_url = { "sb_qtvlist_url", "http://qtv.quakeworld.nu/?rss" };
typedef struct sb_qtvplayer_s {
struct sb_qtvplayer_s *next; // next item in the linked list of players
char name[MAX_SCOREBOARDNAME];
char team[MAX_SCOREBOARDNAME];
int frags;
int ping;
int pl;
int topcolor;
int bottomcolor;
} sb_qtvplayer_t;
typedef struct sb_qtventry_s {
struct sb_qtventry_s *next; // next item in the linked list of entries
char title[MAX_QTV_ENTRY_TEXTLEN];
char link[MAX_QTV_ENTRY_TEXTLEN];
char hostname[MAX_QTV_ENTRY_TEXTLEN];
int port;
netadr_t addr;
int observercount;
sb_qtvplayer_t *players; // first item of a linked list
} sb_qtventry_t;
typedef enum {
QTVLIST_INITIAL,
QTVLIST_ITEM,
QTVLIST_PLAYER,
} sb_qtvlist_parse_position_t;
typedef enum {
QTVLIST_INIT,
QTVLIST_PROCESSING,
QTVLIST_DOWNLOADING,
QTVLIST_PARSING,
QTVLIST_RESOLVING,
QTVLIST_PRINTING,
QTVLIST_READY
} sb_qtvlist_status_t;
typedef struct sb_qtvlist_parse_state_s {
char chardata_buffer[CHARACTERDATA_BUFFERSIZE];
sb_qtventry_t *list;
sb_qtvlist_parse_position_t position;
} sb_qtvlist_parse_state_t;
typedef struct sb_qtvlist_cache_s {
sb_qtventry_t *sb_qtventries;
sb_qtvlist_status_t status;
} sb_qtvlist_cache_t;
static sb_qtvlist_cache_t sb_qtvlist_cache = { NULL, QTVLIST_INIT };
static sb_qtventry_t *QTVList_New_Entry(void)
{
sb_qtventry_t *ret;
ret = Q_calloc(sizeof (sb_qtventry_t), 1);
return ret;
}
static sb_qtvplayer_t *QTVList_New_Player(void)
{
sb_qtvplayer_t *ret;
ret = Q_calloc(sizeof (sb_qtvplayer_t), 1);
return ret;
}
static void QTVList_Parse_StartElement(void *userData, const XML_Char *name,
const XML_Char **atts)
{
sb_qtvlist_parse_state_t *sb_qtvparse = (sb_qtvlist_parse_state_t *) userData;
if (sb_qtvparse->position == QTVLIST_INITIAL) {
if (strcmp(name, "item") == 0) {
sb_qtventry_t *current = sb_qtvparse->list;
sb_qtventry_t *newentry = QTVList_New_Entry();
newentry->next = current;
sb_qtvparse->list = newentry;
sb_qtvparse->position = QTVLIST_ITEM;
}
else {
}
}
else if (sb_qtvparse->position == QTVLIST_ITEM) {
if (strcmp(name, "player") == 0) {
sb_qtvplayer_t *current = sb_qtvparse->list->players;
sb_qtvplayer_t *newplayer = QTVList_New_Player();
newplayer->next = current;
sb_qtvparse->list->players = newplayer;
sb_qtvparse->position = QTVLIST_PLAYER;
}
}
else if (sb_qtvparse->position == QTVLIST_PLAYER) {
}
else {
Sys_Error("QTVList_Parse_StartElement(): invalid position");
}
}
void QTVList_Parse_CharacterData(void *userData, const XML_Char *s, int len)
{
sb_qtvlist_parse_state_t *sb_qtvparse = (sb_qtvlist_parse_state_t *) userData;
size_t copied;
size_t n;
copied = strlen(sb_qtvparse->chardata_buffer);
n = 0;
while (copied + 1 < CHARACTERDATA_BUFFERSIZE && n < len) {
sb_qtvparse->chardata_buffer[copied++] = s[n++];
}
sb_qtvparse->chardata_buffer[copied] = '\0';
}
void QTVList_Parse_EndElement(void *userData, const XML_Char *name)
{
sb_qtvlist_parse_state_t *sb_qtvparse = (sb_qtvlist_parse_state_t *) userData;
char *buf = str_trim(sb_qtvparse->chardata_buffer);
if (sb_qtvparse->position == QTVLIST_INITIAL) {
}
else if (sb_qtvparse->position == QTVLIST_ITEM) {
if (strcmp(name, "hostname") == 0) {
strlcpy(sb_qtvparse->list->hostname, buf, MAX_QTV_ENTRY_TEXTLEN);
}
else if (strcmp(name, "port") == 0) {
sb_qtvparse->list->port = Q_atoi(buf);
}
else if (strcmp(name, "observercount") == 0) {
sb_qtvparse->list->observercount = Q_atoi(buf);
}
else if (strcmp(name, "title") == 0) {
strlcpy(sb_qtvparse->list->title, buf, MAX_QTV_ENTRY_TEXTLEN);
}
else if (strcmp(name, "link") == 0) {
strlcpy(sb_qtvparse->list->link, buf, MAX_QTV_ENTRY_TEXTLEN);
}
else if (strcmp(name, "item") == 0) {
sb_qtvparse->position = QTVLIST_INITIAL; // go up
}
else if (strcmp(name, "player") == 0) {
sb_qtvparse->position = QTVLIST_PLAYER; // go down
}
}
else if (sb_qtvparse->position == QTVLIST_PLAYER) {
if (strcmp(name, "name") == 0) {
strlcpy(sb_qtvparse->list->players->name, buf, MAX_SCOREBOARDNAME);
}
else if (strcmp(name, "team") == 0) {
strlcpy(sb_qtvparse->list->players->team, buf, MAX_SCOREBOARDNAME);
}
else if (strcmp(name, "frags") == 0) {
sb_qtvparse->list->players->frags = Q_atoi(buf);
}
else if (strcmp(name, "ping") == 0) {
sb_qtvparse->list->players->ping = Q_atoi(buf);
}
else if (strcmp(name, "pl") == 0) {
sb_qtvparse->list->players->pl = Q_atoi(buf);
}
else if (strcmp(name, "topcolor") == 0) {
sb_qtvparse->list->players->topcolor = Q_atoi(buf);
}
else if (strcmp(name, "bottomcolor") == 0) {
sb_qtvparse->list->players->bottomcolor = Q_atoi(buf);
}
else if (strcmp(name, "player") == 0) {
sb_qtvparse->position = QTVLIST_ITEM;
}
}
buf[0] = '\0';
}
sb_qtvlist_parse_state_t *QTVList_Parse_Init(void)
{
sb_qtvlist_parse_state_t *ret = Q_malloc(sizeof (sb_qtvlist_parse_state_t));
ret->chardata_buffer[0] = '\0';
ret->list = NULL;
ret->position = QTVLIST_INITIAL;
return ret;
}
void QTVList_Entry_Destroy(sb_qtventry_t *entry)
{
while (entry->players) {
sb_qtvplayer_t *next = entry->players->next;
Q_free(entry->players);
entry->players = next;
}
Q_free(entry);
}
void QTVList_Parse_Destroy(sb_qtvlist_parse_state_t *parse)
{
while (parse->list) {
sb_qtventry_t *next = parse->list->next;
QTVList_Entry_Destroy(parse->list);
parse->list = next;
}
}
void QTVList_Process_Full_List(vfsfile_t *f, sb_qtvlist_parse_state_t *sb_qtvparse)
{
XML_Parser parser = NULL;
int len;
enum XML_Status status;
char buf[4096];
vfserrno_t err;
// initialize XML parser
parser = XML_ParserCreate(NULL);
if (parser == NULL) {
Com_Printf("Couldn't initialize XML parser\n");
return;
}
XML_SetStartElementHandler(parser, QTVList_Parse_StartElement);
XML_SetCharacterDataHandler(parser, QTVList_Parse_CharacterData);
XML_SetEndElementHandler(parser, QTVList_Parse_EndElement);
XML_SetUserData(parser, (void *) sb_qtvparse);
while ((len = VFS_READ(f, buf, 4096, &err)) > 0)
{
if ((status = XML_Parse(parser, buf, len, 0)) != XML_STATUS_OK) {
enum XML_Error err = XML_GetErrorCode(parser);
Com_Printf("XML parser error.\n%s\n", status, XML_ErrorString(err));
break;
}
}
XML_ParserFree(parser);
}
void QTVList_Cache_File_Download(void)
{
CURL *curl;
CURLcode res;
FILE *f;
curl = curl_easy_init();
if (curl) {
curl_easy_setopt(curl, CURLOPT_URL, sb_qtvlist_url.string);
}
else {
Com_Printf_State(PRINT_FAIL, "QTVList_List_f() Can't init cURL\n");
return;
}
if (!FS_FCreateFile(QTVLIST_CACHE_FILE, &f, QTVLIST_CACHE_FILE_DIR, "wb+")) {
Com_Printf_State(PRINT_FAIL, "Can't create QTVList cache file\n");
return;
}
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, NULL);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, f);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
fclose(f);
if (res != CURLE_OK) {
Com_Printf_State(PRINT_FAIL, "Couldn't download QTV list");
return;
}
}
static vfsfile_t *QTVList_Cache_File_Open(char *mode)
{
return FS_OpenVFS(QTVLIST_CACHE_FILE_DIR "/" QTVLIST_CACHE_FILE, mode, FS_BASE);
}
static void QTVList_Resolve_Hostnames(void)
{
sb_qtventry_t *cur = sb_qtvlist_cache.sb_qtventries;
while (cur) {
char fulladdr[MAX_QTV_ENTRY_TEXTLEN+6]; /* :xxxxx */
snprintf(&fulladdr[0], sizeof(fulladdr), "%s:%d", cur->hostname, cur->port);
NET_StringToAdr(fulladdr, &cur->addr);
cur->addr.type = NA_IP;
cur = cur->next;
}
}
static qbool QTVList_Cache_File_Is_Old(void)
{
char cache_path[MAX_OSPATH] = {0};
SYSTEMTIME cache_time;
SYSTEMTIME min_time; // minimum required time
int diff;
snprintf(&cache_path[0], sizeof(cache_path), "%s/%s/%s", com_basedir, QTVLIST_CACHE_FILE_DIR, QTVLIST_CACHE_FILE);
GetFileLocalTime(cache_path, &cache_time);
GetLocalTime(&min_time);
// subtract 7 days
if (min_time.wDay > 7) {
min_time.wDay -= 7;
}
else {
// approximately 7 days in this case
// let's not bother if a month has 28, 29, 30 or 31 days
if (min_time.wMonth > 1) {
min_time.wMonth -= 1;
min_time.wDay += 22;
}
else {
min_time.wYear -= 1;
min_time.wMonth = 12;
min_time.wDay += 22;
}
}
diff = SYSTEMTIMEcmp(&cache_time, &min_time);
return diff < 0;
}
void QTVList_Refresh_Cache(qbool force_redownload)
{
char cache_dir[MAX_OSPATH] = {0};
vfsfile_t *cache_file;
sb_qtvlist_parse_state_t *sb_qtvparse;
snprintf(&cache_dir[0], sizeof(cache_dir), "%s/" QTVLIST_CACHE_FILE_DIR, com_basedir);
Sys_mkdir(cache_dir);
if (force_redownload
|| !(cache_file = QTVList_Cache_File_Open("rb"))
|| QTVList_Cache_File_Is_Old())
{
sb_qtvlist_cache.status = QTVLIST_DOWNLOADING;
QTVList_Cache_File_Download();
cache_file = QTVList_Cache_File_Open("rb");
if (!cache_file) {
Com_Printf("Can't open QTV cache file\n");
return;
}
}
sb_qtvlist_cache.status = QTVLIST_PARSING;
sb_qtvparse = QTVList_Parse_Init();
QTVList_Process_Full_List(cache_file, sb_qtvparse);
VFS_CLOSE(cache_file);
sb_qtvlist_cache.sb_qtventries = sb_qtvparse->list;
Q_free(sb_qtvparse);
sb_qtvlist_cache.status = QTVLIST_RESOLVING;
QTVList_Resolve_Hostnames();
}
static size_t QTVList_Length(const sb_qtventry_t *first)
{
size_t ret = 0;
const sb_qtventry_t *cur = first;
while (cur) {
ret++;
cur = cur->next;
}
return ret;
}
static size_t QTVList_Player_Count(const sb_qtventry_t *entry)
{
const sb_qtvplayer_t *cur = entry->players;
size_t ret = 0;
while (cur) {
ret++;
cur = cur->next;
}
return ret;
}
int QTVList_Entry_Cmp(const void *a_v, const void *b_v)
{
sb_qtventry_t *entry_a = (sb_qtventry_t *) a_v;
sb_qtventry_t *entry_b = (sb_qtventry_t *) b_v;
if (entry_a->observercount > entry_b->observercount) {
return -1;
}
else if (entry_a->observercount == entry_b->observercount) {
return 0;
}
else {
return 1;
}
}
static void QTVList_Print(void)
{
size_t len = QTVList_Length(sb_qtvlist_cache.sb_qtventries);
sb_qtventry_t *entries_array;
sb_qtventry_t *cur;
int i;
size_t players;
sb_qtvplayer_t *player;
entries_array = Q_malloc(len * sizeof (sb_qtventry_t));
cur = sb_qtvlist_cache.sb_qtventries;
i = 0;
while (cur) {
memcpy(&entries_array[i++], cur, sizeof (sb_qtventry_t));
cur = cur->next;
}
qsort(entries_array, len, sizeof (sb_qtventry_t), QTVList_Entry_Cmp);
for (i = 0; i < len; i++) {
cur = &entries_array[i];
players = QTVList_Player_Count(cur);
if (players == 0) {
continue;
}
Com_Printf("--- %3d %3u %30s ---\n",
cur->observercount, players, cur->title);
player = cur->players;
while (player) {
Com_Printf(" %4d [%4s] %s\n", player->frags, player->team, player->name);
player = player->next;
}
}
}
int QTVList_Refresh_Cache_Thread(void *userData)
{
QTVList_Refresh_Cache((qbool) userData);
sb_qtvlist_cache.status = QTVLIST_READY;
return 0;
}
int QTVList_Download_And_Print_Thread(void *userData)
{
Com_Printf("QuakeTV list downloading...\n");
QTVList_Refresh_Cache(true);
sb_qtvlist_cache.status = QTVLIST_PRINTING;
QTVList_Print();
sb_qtvlist_cache.status = QTVLIST_READY;
return 0;
}
void QTVList_Print_Global(void)
{
if (sb_qtvlist_cache.status != QTVLIST_READY && sb_qtvlist_cache.status != QTVLIST_INIT) {
Com_Printf("QTV cache is still being rebuilt\n");
return;
}
sb_qtvlist_cache.status = QTVLIST_PROCESSING;
if (Sys_CreateDetachedThread(QTVList_Download_And_Print_Thread, NULL) < 0) {
Com_Printf("Failed to create QTVList Download_And_Print thread\n");
}
}
void QTVList_Initialize_Streammap(void)
{
if (sb_qtvlist_cache.status != QTVLIST_READY && sb_qtvlist_cache.status != QTVLIST_INIT) {
Com_Printf("QTV cache is still being rebuilt\n");
return;
}
sb_qtvlist_cache.status = QTVLIST_PROCESSING;
if (Sys_CreateDetachedThread(QTVList_Refresh_Cache_Thread, NULL) < 0) {
Com_Printf("Failed to create QTVList Refresh_Cache thread\n");
}
}
static netadr_t QTVList_Current_IP(void)
{
netadr_t adr;
char *prx = Info_ValueForKey(cls.userinfo, "prx");
if (prx && *prx) {
char *lastsep = strrchr(prx, '@');
lastsep = lastsep ? lastsep + 1 : prx;
NET_StringToAdr(lastsep, &adr);
return adr;
}
else {
return cls.server_adr;
}
}
void QTVList_Observeqtv_f(void)
{
netadr_t addr;
sb_qtventry_t *cur;
if (sb_qtvlist_cache.status != QTVLIST_READY) {
Com_Printf("QTV cache is still being rebuilt\n");
return;
}
if (Cmd_Argc() < 2) {
addr = QTVList_Current_IP();
}
else {
NET_StringToAdr(Cmd_Argv(1), &addr);
}
if (addr.type == NA_IP) {
cur = sb_qtvlist_cache.sb_qtventries;
while (cur) {
if (cur->addr.port == addr.port && memcmp(cur->addr.ip, addr.ip, sizeof (addr.ip)) == 0) {
Cbuf_AddText("qtvplay ");
Cbuf_AddText(cur->link);
Cbuf_AddText("\n");
return;
}
cur = cur->next;
}
Com_Printf("Cannot find current server on any QTV\n");
}
else {
Com_Printf("Can't observe current server via QTV\n");
}
}
void QTVList_Init(void)
{
Cvar_SetCurrentGroup(CVAR_GROUP_SERVER_BROWSER);
Cvar_Register(&sb_qtvlist_url);
Cvar_ResetCurrentGroup();
Cmd_AddCommand("observeqtv", QTVList_Observeqtv_f);
QTVList_Initialize_Streammap();
}