func queryServerIDRetriever(w http.ResponseWriter, ids []string) {
s := make(chan map[string]string, len(ids))
db.ServerDB.GetHostsAndGameFromIDAPIQuery(s, ids)
hostsgames := <-s
if len(hostsgames) == 0 {
w.WriteHeader(http.StatusOK)
if err := json.NewEncoder(w).Encode(models.GetDefaultServerList()); err != nil {
writeJSONEncodeError(w, err)
}
return
}
serverlist, err := steam.Query(hostsgames)
if err != nil {
setNotFoundAndLog(w, err)
if err := json.NewEncoder(w).Encode(models.GetDefaultServerList()); err != nil {
writeJSONEncodeError(w, err)
return
}
return
}
if err := json.NewEncoder(w).Encode(serverlist); err != nil {
writeJSONEncodeError(w, err)
logger.LogWebError(err)
}
}
// Query retrieves the server information for a given set of host to game pairs
// and returns it in a format that is presented to the API. It takes a map consisting
// of host(s) and their corresponding game names (i.e: k:127.0.0.1:27960, v:"QuakeLive")
func Query(hostsgames map[string]string) (*models.APIServerList, error) {
hg := make(map[string]filters.Game, len(hostsgames))
needsPlayers := make([]string, len(hostsgames))
needsRules := make([]string, len(hostsgames))
needsInfo := make([]string, len(hostsgames))
for host, game := range hostsgames {
fg := filters.GetGameByName(game)
hg[host] = fg
if !fg.IgnoreRules {
needsRules = append(needsRules, host)
}
if !fg.IgnorePlayers {
needsPlayers = append(needsPlayers, host)
}
if !fg.IgnoreInfo {
needsInfo = append(needsInfo, host)
}
}
data := a2sData{
HostsGames: hg,
Info: batchInfoQuery(needsInfo),
Rules: batchRuleQuery(needsRules),
Players: batchPlayerQuery(needsPlayers),
}
sl, err := buildServerList(data, true)
if err != nil {
return models.GetDefaultServerList(), logger.LogAppError(err)
}
return sl, nil
}
func queryServerAddrs(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json; charset=UTF-8")
if !config.Config.WebConfig.AllowDirectUserQueries {
w.WriteHeader(http.StatusBadRequest)
fmt.Fprintf(w,
`{"error": {"code": 400,"message": "Direct server queries are disabled. Use the %s parameter."}}`,
qsQueryServerIDs)
return
}
addresses := getQStringValues(r.URL.Query(), qsQueryServerAddrs)
logger.WriteDebug("addresses length: %d", len(addresses))
logger.WriteDebug("addresses are: %s", addresses)
if addresses == nil {
w.WriteHeader(http.StatusOK)
logger.WriteDebug("queryServerAddr: Got empty address query. Ignoring.")
writeJSONResponse(w, models.GetDefaultServerList())
return
}
var parsedaddresses []string
for _, addr := range addresses {
host, err := net.ResolveTCPAddr("tcp4", addr)
if err != nil {
continue
}
parsedaddresses = append(parsedaddresses, fmt.Sprintf("%s:%d", host.IP, host.Port))
}
if len(parsedaddresses) == 0 {
w.WriteHeader(http.StatusOK)
logger.WriteDebug("queryServerAddr: No valid addresses for query. Ignoring.")
writeJSONResponse(w, models.GetDefaultServerList())
return
}
if len(parsedaddresses) > config.Config.WebConfig.MaximumHostsPerAPIQuery {
logger.WriteDebug("Maximum number of allowed API query hosts exceeded, truncating")
parsedaddresses = parsedaddresses[:config.Config.WebConfig.MaximumHostsPerAPIQuery]
}
queryServerAddrRetriever(w, parsedaddresses)
}
func queryServerAddrRetriever(w http.ResponseWriter, addresses []string) {
serverlist, err := steam.DirectQuery(addresses)
if err != nil {
setNotFoundAndLog(w, err)
if err := json.NewEncoder(w).Encode(models.GetDefaultServerList()); err != nil {
writeJSONEncodeError(w, err)
return
}
return
}
if err := json.NewEncoder(w).Encode(serverlist); err != nil {
writeJSONEncodeError(w, err)
}
}
// DirectQuery allows a user to query any host even if it is not in the internal
// server ID database. It is primarily intended for testing as it has two main
// issues: 1) obvious security implications, 2) determining which game a user-
// supplied host represents rests on potentially unreliable assumptions, which if
// not true would cause games with incomplete support for all three A2S queries
// (e.g. Reflex) to always fail. A production environment should use Query() instead.
func DirectQuery(hosts []string) (*models.APIServerList, error) {
hg := make(map[string]filters.Game, len(hosts))
// Try to account for the fact that we can't determine the game ahead of time
// for user-specified direct host queries -- a number of assumptions:
// (1) A2S_INFO for game/host, (2) extra data A2S_INFO flag & field w/ appid,
//(3) game has been defined in game.go with the correct AppID and A2S ignore flags
info := batchInfoQuery(hosts)
needsRules := make([]string, len(hosts))
needsPlayers := make([]string, len(hosts))
for _, h := range hosts {
logger.WriteDebug("direct query for %s. will try to figure out needed queries", h)
if (info[h] != models.SteamServerInfo{}) {
logger.WriteDebug("A2S_INFO not empty. got gameid: %d", info[h].ExtraData.GameID)
fg := filters.GetGameByAppID(info[h].ExtraData.GameID)
hg[h] = fg
if !fg.IgnoreRules {
logger.WriteDebug("based on game %s for %s, will need to get A2S_RULES",
fg.Name, h)
needsRules = append(needsRules, h)
}
if !fg.IgnorePlayers {
logger.WriteDebug("based on game %s for %s, will need to get A2S_PLAYERS",
fg.Name, h)
needsPlayers = append(needsPlayers, h)
}
} else {
logger.WriteDebug("A2S_INFO is nil. game will be unspecified; results may vary")
hg[h] = filters.GameUnspecified
}
}
data := a2sData{
HostsGames: hg,
Info: info,
Rules: batchRuleQuery(needsRules),
Players: batchPlayerQuery(needsPlayers),
}
sl, err := buildServerList(data, true)
if err != nil {
return models.GetDefaultServerList(), logger.LogAppError(err)
}
return sl, nil
}
func queryServerIDs(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json; charset=UTF-8")
ids := getQStringValues(r.URL.Query(), qsQueryServerIDs)
logger.WriteDebug("queryServerID: ids length: %d", len(ids))
logger.WriteDebug("queryServerID: ids are: %s", ids)
if ids == nil {
w.WriteHeader(http.StatusOK)
logger.WriteDebug("queryServerID: Got empty query. Ignoring.")
writeJSONResponse(w, models.GetDefaultServerList())
return
}
if len(ids) > config.Config.WebConfig.MaximumHostsPerAPIQuery {
logger.WriteDebug("Maximum number of allowed API query hosts exceeded, truncating")
ids = ids[:config.Config.WebConfig.MaximumHostsPerAPIQuery]
}
queryServerIDRetriever(w, ids)
}
func getServers(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json; charset=UTF-8")
var asl *models.APIServerList
if config.Config.DebugConfig.ServerDumpFileAsMasterList {
asl = useDumpFileAsMasterList(constants.DumpFileFullPath(
config.Config.DebugConfig.ServerDumpFilename))
} else {
asl = models.MasterList
}
// Empty (i.e. during first retrieval/startup)
if asl == nil {
writeJSONResponse(w, models.GetDefaultServerList())
return
}
srvfilters := getSrvFilterFromQString(r.URL.Query(), getServersQueryStrings)
logger.WriteDebug("server list will be filtered with: %v", srvfilters)
list := filterServers(srvfilters, asl)
writeJSONResponse(w, list)
}
// filterServers takes the server filters and the last retrieved server list and
// returns a new, filtered server list based on the matched filters.
func filterServers(sqf []slQueryFilter,
a *models.APIServerList) *models.APIServerList {
if a == nil {
return models.GetDefaultServerList()
}
filtered := make([]models.APIServer, len(a.Servers))
copy(filtered, a.Servers)
for _, s := range sqf {
filtered = findMatches(s, filtered)
}
if filtered == nil {
// JSON empty array instead of null
filtered = make([]models.APIServer, 0)
}
return &models.APIServerList{
RetrievedAt: a.RetrievedAt,
RetrievedTimeStamp: a.RetrievedTimeStamp,
Servers: filtered,
ServerCount: len(filtered),
FailedCount: 0,
FailedServers: make([]string, 0),
}
}