Add 'sv_maps_base_url' to support map download https urls

Author: Kaffeine

src/engine/server/server.cpp

@@ -251,6 +251,7 @@ CServer::CServer()
 	m_ReloadedWhenEmpty = false;
 	m_aCurrentMap[0] = '\0';
 	m_pCurrentMapName = m_aCurrentMap;
+	m_aMapDownloadUrl[0] = '\0';
 
 	m_RconClientId = IServer::RCON_CID_SERV;
 	m_RconAuthLevel = AUTHED_ADMIN;
@@ -1214,7 +1215,14 @@ void CServer::SendMap(int ClientId)
 		Msg.AddRaw(&m_aCurrentMapSha256[MapType].data, sizeof(m_aCurrentMapSha256[MapType].data));
 		Msg.AddInt(m_aCurrentMapCrc[MapType]);
 		Msg.AddInt(m_aCurrentMapSize[MapType]);
-		Msg.AddString("", 0); // HTTPS map download URL
+		if(m_aMapDownloadUrl[0])
+		{
+			Msg.AddString(m_aMapDownloadUrl, 0);
+		}
+		else
+		{
+			Msg.AddString("", 0);
+		}
 		SendMsg(&Msg, MSGFLAG_VITAL, ClientId);
 	}
 	{
@@ -2591,6 +2599,16 @@ int CServer::LoadMap(const char *pMapName)
 		m_apCurrentMapData[MAP_TYPE_SIX] = (unsigned char *)pData;
 	}
 
+	if(Config()->m_SvMapsBaseUrl[0])
+	{
+		str_format(aBuf, sizeof(aBuf), "%s%s_%s.map", Config()->m_SvMapsBaseUrl, pMapName, aSha256);
+		EscapeUrl(m_aMapDownloadUrl, aBuf);
+	}
+	else
+	{
+		m_aMapDownloadUrl[0] = '\0';
+	}
+
 	// load sixup version of the map
 	if(Config()->m_SvSixup)
 	{

src/engine/server/server.h

@@ -247,6 +247,7 @@ class CServer : public IServer
 	unsigned m_aCurrentMapCrc[NUM_MAP_TYPES];
 	unsigned char *m_apCurrentMapData[NUM_MAP_TYPES];
 	unsigned int m_aCurrentMapSize[NUM_MAP_TYPES];
+	char m_aMapDownloadUrl[256];
 
 	CDemoRecorder m_aDemoRecorder[NUM_RECORDERS];
 	CAuthManager m_AuthManager;

src/engine/shared/config_variables.h

@@ -439,6 +439,7 @@ MACRO_CONFIG_INT(SvHighBandwidth, sv_high_bandwidth, 0, 0, 1, CFGFLAG_SERVER, "U
 MACRO_CONFIG_STR(SvRegister, sv_register, 16, "1", CFGFLAG_SERVER, "Register server with master server for public listing, can also accept a comma-separated list of protocols to register on, like 'ipv4,ipv6'")
 MACRO_CONFIG_STR(SvRegisterExtra, sv_register_extra, 256, "", CFGFLAG_SERVER, "Extra headers to send to the register endpoint, comma separated 'Header: Value' pairs")
 MACRO_CONFIG_STR(SvRegisterUrl, sv_register_url, 128, "https://master1.ddnet.org/ddnet/15/register", CFGFLAG_SERVER, "Masterserver URL to register to")
+MACRO_CONFIG_STR(SvMapsBaseUrl, sv_maps_base_url, 128, "", CFGFLAG_SERVER, "Base path used to provide HTTPS map download URL to the clients")
 MACRO_CONFIG_STR(SvRconPassword, sv_rcon_password, 128, "", CFGFLAG_SERVER | CFGFLAG_NONTEEHISTORIC, "Remote console password (full access)")
 MACRO_CONFIG_STR(SvRconModPassword, sv_rcon_mod_password, 128, "", CFGFLAG_SERVER | CFGFLAG_NONTEEHISTORIC, "Remote console password for moderators (limited access)")
 MACRO_CONFIG_STR(SvRconHelperPassword, sv_rcon_helper_password, 128, "", CFGFLAG_SERVER | CFGFLAG_NONTEEHISTORIC, "Remote console password for helpers (limited access)")