/* * ZeroTier One - Network Virtualization Everywhere * Copyright (C) 2011-2015 ZeroTier, Inc. * * 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 3 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 * 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, see . */ #include "JSONDB.hpp" #define ZT_JSONDB_HTTP_TIMEOUT 60000 namespace ZeroTier { static const nlohmann::json _EMPTY_JSON(nlohmann::json::object()); static const std::map _ZT_JSONDB_GET_HEADERS; JSONDB::JSONDB(const std::string &basePath) : _basePath(basePath), _ready(false) { if ((_basePath.length() > 7)&&(_basePath.substr(0,7) == "http://")) { // TODO: this doesn't yet support IPv6 since bracketed address notiation isn't supported. // Typically it's used with 127.0.0.1 anyway. std::string hn = _basePath.substr(7); std::size_t hnend = hn.find_first_of('/'); if (hnend != std::string::npos) hn = hn.substr(0,hnend); std::size_t hnsep = hn.find_last_of(':'); if (hnsep != std::string::npos) hn[hnsep] = '/'; _httpAddr.fromString(hn); if (hnend != std::string::npos) _basePath = _basePath.substr(7 + hnend); if (_basePath.length() == 0) _basePath = "/"; if (_basePath[0] != '/') _basePath = std::string("/") + _basePath; } else { OSUtils::mkdir(_basePath.c_str()); OSUtils::lockDownFile(_basePath.c_str(),true); // networks might contain auth tokens, etc., so restrict directory permissions } _ready = _reload(_basePath,std::string()); } bool JSONDB::writeRaw(const std::string &n,const std::string &obj) { if (!_isValidObjectName(n)) return false; if (_httpAddr) { std::map headers; std::string body; std::map reqHeaders; char tmp[64]; Utils::snprintf(tmp,sizeof(tmp),"%lu",(unsigned long)obj.length()); reqHeaders["Content-Length"] = tmp; reqHeaders["Content-Type"] = "application/json"; const unsigned int sc = Http::PUT(1048576,ZT_JSONDB_HTTP_TIMEOUT,reinterpret_cast(&_httpAddr),(_basePath+"/"+n).c_str(),reqHeaders,obj.data(),(unsigned long)obj.length(),headers,body); return (sc == 200); } else { const std::string path(_genPath(n,true)); if (!path.length()) return false; return OSUtils::writeFile(path.c_str(),obj); } } bool JSONDB::put(const std::string &n,const nlohmann::json &obj) { const bool r = writeRaw(n,OSUtils::jsonDump(obj)); _db[n].obj = obj; return r; } const nlohmann::json &JSONDB::get(const std::string &n) { while (!_ready) { Thread::sleep(250); _ready = _reload(_basePath,std::string()); } if (!_isValidObjectName(n)) return _EMPTY_JSON; std::map::iterator e(_db.find(n)); if (e != _db.end()) return e->second.obj; std::string buf; if (_httpAddr) { std::map headers; const unsigned int sc = Http::GET(1048576,ZT_JSONDB_HTTP_TIMEOUT,reinterpret_cast(&_httpAddr),(_basePath+"/"+n).c_str(),_ZT_JSONDB_GET_HEADERS,headers,buf); if (sc != 200) return _EMPTY_JSON; } else { const std::string path(_genPath(n,false)); if (!path.length()) return _EMPTY_JSON; if (!OSUtils::readFile(path.c_str(),buf)) return _EMPTY_JSON; } try { _E &e2 = _db[n]; e2.obj = OSUtils::jsonParse(buf); return e2.obj; } catch ( ... ) { _db.erase(n); return _EMPTY_JSON; } } void JSONDB::erase(const std::string &n) { if (!_isValidObjectName(n)) return; if (_httpAddr) { std::string body; std::map headers; Http::DEL(1048576,ZT_JSONDB_HTTP_TIMEOUT,reinterpret_cast(&_httpAddr),(_basePath+"/"+n).c_str(),_ZT_JSONDB_GET_HEADERS,headers,body); } else { std::string path(_genPath(n,true)); if (!path.length()) return; OSUtils::rm(path.c_str()); } _db.erase(n); } bool JSONDB::_reload(const std::string &p,const std::string &b) { if (_httpAddr) { std::string body; std::map headers; const unsigned int sc = Http::GET(2147483647,ZT_JSONDB_HTTP_TIMEOUT,reinterpret_cast(&_httpAddr),_basePath.c_str(),_ZT_JSONDB_GET_HEADERS,headers,body); if (sc == 200) { try { nlohmann::json dbImg(OSUtils::jsonParse(body)); std::string tmp; if (dbImg.is_object()) { for(nlohmann::json::iterator i(dbImg.begin());i!=dbImg.end();++i) { if (i.value().is_object()) { tmp = i.key(); _db[tmp].obj = i.value(); } } return true; } } catch ( ... ) {} // invalid JSON, so maybe incomplete request } return false; } else { std::vector dl(OSUtils::listDirectory(p.c_str(),true)); for(std::vector::const_iterator di(dl.begin());di!=dl.end();++di) { if ((di->length() > 5)&&(di->substr(di->length() - 5) == ".json")) { this->get(b + di->substr(0,di->length() - 5)); } else { this->_reload((p + ZT_PATH_SEPARATOR + *di),(b + *di + ZT_PATH_SEPARATOR)); } } return true; } } bool JSONDB::_isValidObjectName(const std::string &n) { if (n.length() == 0) return false; const char *p = n.c_str(); char c; // For security reasons we should not allow dots, backslashes, or other path characters or potential path characters. while ((c = *(p++))) { if (!( ((c >= 'a')&&(c <= 'z')) || ((c >= 'A')&&(c <= 'Z')) || ((c >= '0')&&(c <= '9')) || (c == '/') || (c == '_') || (c == '~') || (c == '-') )) return false; } return true; } std::string JSONDB::_genPath(const std::string &n,bool create) { std::vector pt(OSUtils::split(n.c_str(),"/","","")); if (pt.size() == 0) return std::string(); char sep; if (_httpAddr) { sep = '/'; create = false; } else { sep = ZT_PATH_SEPARATOR; } std::string p(_basePath); if (create) OSUtils::mkdir(p.c_str()); for(unsigned long i=0,j=(unsigned long)(pt.size()-1);i