HTTP backend support for JSONDB
This commit is contained in:
Adam Ierymenko
parent
f6d92eb737
commit
bc61357a44
5 changed files with 178 additions and 60 deletions
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@ -18,43 +18,67 @@
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#include "JSONDB.hpp"
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#define ZT_JSONDB_HTTP_TIMEOUT 60000
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namespace ZeroTier {
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static const nlohmann::json _EMPTY_JSON(nlohmann::json::object());
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static const std::map<std::string,std::string> _ZT_JSONDB_GET_HEADERS;
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JSONDB::JSONDB(const std::string &basePath) :
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_basePath(basePath)
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{
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if ((_basePath.length() > 7)&&(_basePath.substr(0,7) == "http://")) {
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// TODO: this doesn't yet support IPv6 since bracketed address notiation isn't supported.
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// Typically it's used with 127.0.0.1 anyway.
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std::string hn = _basePath.substr(7);
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std::size_t hnend = hn.find_first_of('/');
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if (hnend != std::string::npos)
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hn = hn.substr(0,hnend);
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std::size_t hnsep = hn.find_last_of(':');
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if (hnsep != std::string::npos)
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hn[hnsep] = '/';
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_httpAddr.fromString(hn);
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if (hnend != std::string::npos)
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_basePath = _basePath.substr(7 + hnend);
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if (_basePath.length() == 0)
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_basePath = "/";
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if (_basePath[0] != '/')
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_basePath = std::string("/") + _basePath;
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} else {
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OSUtils::mkdir(_basePath.c_str());
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OSUtils::lockDownFile(_basePath.c_str(),true); // networks might contain auth tokens, etc., so restrict directory permissions
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}
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_reload(_basePath,std::string());
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}
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bool JSONDB::writeRaw(const std::string &n,const std::string &obj)
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{
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if (!_isValidObjectName(n))
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return false;
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const std::string path(_genPath(n,true));
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if (!path.length())
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return false;
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const std::string buf(obj);
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if (!OSUtils::writeFile(path.c_str(),buf))
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return false;
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return true;
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if (_httpAddr) {
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std::map<std::string,std::string> headers;
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std::string body;
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std::map<std::string,std::string> reqHeaders;
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char tmp[64];
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Utils::snprintf(tmp,sizeof(tmp),"%lu",(unsigned long)obj.length());
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reqHeaders["Content-Length"] = tmp;
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reqHeaders["Content-Type"] = "application/json";
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const unsigned int sc = Http::PUT(1048576,ZT_JSONDB_HTTP_TIMEOUT,reinterpret_cast<const struct sockaddr *>(&_httpAddr),(_basePath+"/"+n).c_str(),reqHeaders,obj.data(),obj.length(),headers,body);
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return (sc == 200);
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} else {
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const std::string path(_genPath(n,true));
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if (!path.length())
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return false;
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return OSUtils::writeFile(path.c_str(),obj);
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}
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}
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bool JSONDB::put(const std::string &n,const nlohmann::json &obj)
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{
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if (!_isValidObjectName(n))
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return false;
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const std::string path(_genPath(n,true));
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if (!path.length())
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return false;
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const std::string buf(OSUtils::jsonDump(obj));
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if (!OSUtils::writeFile(path.c_str(),buf))
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return false;
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_E &e = _db[n];
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e.obj = obj;
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return true;
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const bool r = writeRaw(n,OSUtils::jsonDump(obj));
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_db[n].obj = obj;
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return r;
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}
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const nlohmann::json &JSONDB::get(const std::string &n)
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@ -66,22 +90,28 @@ const nlohmann::json &JSONDB::get(const std::string &n)
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if (e != _db.end())
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return e->second.obj;
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const std::string path(_genPath(n,false));
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if (!path.length())
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return _EMPTY_JSON;
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std::string buf;
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if (!OSUtils::readFile(path.c_str(),buf))
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return _EMPTY_JSON;
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_E &e2 = _db[n];
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try {
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e2.obj = OSUtils::jsonParse(buf);
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} catch ( ... ) {
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e2.obj = _EMPTY_JSON;
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buf = "{}";
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if (_httpAddr) {
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std::map<std::string,std::string> headers;
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const unsigned int sc = Http::GET(1048576,ZT_JSONDB_HTTP_TIMEOUT,reinterpret_cast<const struct sockaddr *>(&_httpAddr),(_basePath+"/"+n).c_str(),_ZT_JSONDB_GET_HEADERS,headers,buf);
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if (sc != 200)
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return _EMPTY_JSON;
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} else {
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const std::string path(_genPath(n,false));
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if (!path.length())
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return _EMPTY_JSON;
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if (!OSUtils::readFile(path.c_str(),buf))
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return _EMPTY_JSON;
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}
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return e2.obj;
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try {
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_E &e2 = _db[n];
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e2.obj = OSUtils::jsonParse(buf);
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return e2.obj;
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} catch ( ... ) {
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_db.erase(n);
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return _EMPTY_JSON;
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}
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}
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void JSONDB::erase(const std::string &n)
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@ -89,23 +119,50 @@ void JSONDB::erase(const std::string &n)
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if (!_isValidObjectName(n))
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return;
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std::string path(_genPath(n,true));
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if (!path.length())
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return;
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if (_httpAddr) {
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std::string body;
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std::map<std::string,std::string> headers;
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Http::DEL(1048576,ZT_JSONDB_HTTP_TIMEOUT,reinterpret_cast<const struct sockaddr *>(&_httpAddr),(_basePath+"/"+n).c_str(),_ZT_JSONDB_GET_HEADERS,headers,body);
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} else {
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std::string path(_genPath(n,true));
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if (!path.length())
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return;
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OSUtils::rm(path.c_str());
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}
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OSUtils::rm(path.c_str());
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_db.erase(n);
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}
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void JSONDB::_reload(const std::string &p,const std::string &b)
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{
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std::vector<std::string> dl(OSUtils::listDirectory(p.c_str(),true));
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for(std::vector<std::string>::const_iterator di(dl.begin());di!=dl.end();++di) {
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printf("%s\n",di->c_str());
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if ((di->length() > 5)&&(di->substr(di->length() - 5) == ".json")) {
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this->get(b + di->substr(0,di->length() - 5));
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} else {
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this->_reload((p + ZT_PATH_SEPARATOR + *di),(b + *di + ZT_PATH_SEPARATOR));
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if (_httpAddr) {
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std::string body;
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std::map<std::string,std::string> headers;
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const unsigned int sc = Http::GET(2147483647,ZT_JSONDB_HTTP_TIMEOUT,reinterpret_cast<const struct sockaddr *>(&_httpAddr),_basePath.c_str(),_ZT_JSONDB_GET_HEADERS,headers,body);
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if (sc == 200) {
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try {
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nlohmann::json dbImg(OSUtils::jsonParse(body));
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std::string tmp;
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if (dbImg.is_object()) {
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for(nlohmann::json::iterator i(dbImg.begin());i!=dbImg.end();++i) {
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if (i.value().is_object()) {
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tmp = i.key();
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_db[tmp].obj = i.value();
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}
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}
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}
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} catch ( ... ) {
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// TODO: report error?
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}
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}
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} else {
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std::vector<std::string> dl(OSUtils::listDirectory(p.c_str(),true));
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for(std::vector<std::string>::const_iterator di(dl.begin());di!=dl.end();++di) {
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if ((di->length() > 5)&&(di->substr(di->length() - 5) == ".json")) {
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this->get(b + di->substr(0,di->length() - 5));
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} else {
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this->_reload((p + ZT_PATH_SEPARATOR + *di),(b + *di + ZT_PATH_SEPARATOR));
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}
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}
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}
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}
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@ -130,15 +187,23 @@ std::string JSONDB::_genPath(const std::string &n,bool create)
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if (pt.size() == 0)
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return std::string();
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char sep;
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if (_httpAddr) {
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sep = '/';
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create = false;
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} else {
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sep = ZT_PATH_SEPARATOR;
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}
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std::string p(_basePath);
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if (create) OSUtils::mkdir(p.c_str());
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for(unsigned long i=0,j=(unsigned long)(pt.size()-1);i<j;++i) {
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p.push_back(ZT_PATH_SEPARATOR);
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p.push_back(sep);
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p.append(pt[i]);
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if (create) OSUtils::mkdir(p.c_str());
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}
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p.push_back(ZT_PATH_SEPARATOR);
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p.push_back(sep);
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p.append(pt[pt.size()-1]);
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p.append(".json");
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