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#include "meta_info.h"
#include <library/cpp/json/json_reader.h>
#include <util/string/builder.h>
namespace NTvmAuth::NTvmTool {
TString TMetaInfo::TConfig::ToString() const {
TStringStream s;
s << "self_tvm_id=" << SelfTvmId << ", "
<< "bb_env=" << BbEnv << ", "
<< "dsts=[";
for (const auto& pair : DstAliases) {
s << "(" << pair.first << ":" << pair.second << ")";
}
s << "]";
return std::move(s.Str());
}
TMetaInfo::TMetaInfo(TLoggerPtr logger)
: Logger_(std::move(logger))
{
}
TMetaInfo::TConfigPtr TMetaInfo::Init(TKeepAliveHttpClient& client,
const TClientSettings& settings) {
ApplySettings(settings);
TryPing(client);
const TString metaString = Fetch(client);
if (Logger_) {
TStringStream s;
s << "Meta info fetched from " << settings.GetHostname() << ":" << settings.GetPort();
Logger_->Debug(s.Str());
}
try {
Config_.Set(ParseMetaString(metaString, SelfAlias_));
} catch (const yexception& e) {
ythrow TNonRetriableException() << "Malformed json from tvmtool: " << e.what();
}
TConfigPtr cfg = Config_.Get();
Y_ENSURE_EX(cfg, TNonRetriableException() << "Alias '" << SelfAlias_ << "' not found in meta info");
if (Logger_) {
Logger_->Info("Meta: " + cfg->ToString());
}
return cfg;
}
TString TMetaInfo::GetRequestForTickets(const TConfig& config) {
Y_ENSURE(!config.DstAliases.empty());
TStringStream s;
s << "/tvm/tickets"
<< "?src=" << config.SelfTvmId
<< "&dsts=";
for (const auto& pair : config.DstAliases) {
s << pair.second << ","; // avoid aliases - url-encoding required
}
s.Str().pop_back();
return s.Str();
}
bool TMetaInfo::TryUpdateConfig(TKeepAliveHttpClient& client) {
const TString metaString = Fetch(client);
TConfigPtr config;
try {
config = ParseMetaString(metaString, SelfAlias_);
} catch (const yexception& e) {
ythrow TNonRetriableException() << "Malformed json from tvmtool: " << e.what();
}
Y_ENSURE_EX(config, TNonRetriableException() << "Alias '" << SelfAlias_ << "' not found in meta info");
TConfigPtr oldConfig = Config_.Get();
if (*config == *oldConfig) {
return false;
}
if (Logger_) {
Logger_->Info(TStringBuilder()
<< "Meta was updated. Old: (" << oldConfig->ToString()
<< "). New: (" << config->ToString() << ")");
}
Config_ = config;
return true;
}
void TMetaInfo::TryPing(TKeepAliveHttpClient& client) {
try {
TStringStream s;
TKeepAliveHttpClient::THttpCode code = client.DoGet("/tvm/ping", &s);
if (code < 200 || 300 <= code) {
throw yexception() << "(" << code << ") " << s.Str();
}
} catch (const std::exception& e) {
ythrow TNonRetriableException() << "Failed to connect to tvmtool: " << e.what();
}
}
TString TMetaInfo::Fetch(TKeepAliveHttpClient& client) const {
TStringStream res;
TKeepAliveHttpClient::THttpCode code;
try {
code = client.DoGet("/tvm/private_api/__meta__", &res, AuthHeader_);
} catch (const std::exception& e) {
ythrow TRetriableException() << "Failed to fetch meta data from tvmtool: " << e.what();
}
if (code != 200) {
Y_ENSURE_EX(code != 404,
TNonRetriableException() << "Library does not support so old tvmtool. You need tvmtool>=1.1.0");
TStringStream err;
err << "Failed to fetch meta from tvmtool: " << client.GetHost() << ":" << client.GetPort()
<< " (" << code << "): " << res.Str();
Y_ENSURE_EX(!(500 <= code && code < 600), TRetriableException() << err.Str());
ythrow TNonRetriableException() << err.Str();
}
return res.Str();
}
static TMetaInfo::TDstAliases::value_type ParsePair(const NJson::TJsonValue& val, const TString& meta) {
NJson::TJsonValue jAlias;
Y_ENSURE(val.GetValue("alias", &jAlias), meta);
Y_ENSURE(jAlias.IsString(), meta);
NJson::TJsonValue jClientId;
Y_ENSURE(val.GetValue("client_id", &jClientId), meta);
Y_ENSURE(jClientId.IsInteger(), meta);
return {jAlias.GetString(), jClientId.GetInteger()};
}
TMetaInfo::TConfigPtr TMetaInfo::ParseMetaString(const TString& meta, const TString& self) {
NJson::TJsonValue jDoc;
Y_ENSURE(NJson::ReadJsonTree(meta, &jDoc), meta);
NJson::TJsonValue jEnv;
Y_ENSURE(jDoc.GetValue("bb_env", &jEnv), meta);
NJson::TJsonValue jTenants;
Y_ENSURE(jDoc.GetValue("tenants", &jTenants), meta);
Y_ENSURE(jTenants.IsArray(), meta);
for (const NJson::TJsonValue& jTen : jTenants.GetArray()) {
NJson::TJsonValue jSelf;
Y_ENSURE(jTen.GetValue("self", &jSelf), meta);
auto selfPair = ParsePair(jSelf, meta);
if (selfPair.first != self) {
continue;
}
TConfigPtr config = std::make_shared<TConfig>();
config->SelfTvmId = selfPair.second;
config->BbEnv = BbEnvFromString(jEnv.GetString(), meta);
NJson::TJsonValue jDsts;
Y_ENSURE(jTen.GetValue("dsts", &jDsts), meta);
Y_ENSURE(jDsts.IsArray(), meta);
for (const NJson::TJsonValue& jDst : jDsts.GetArray()) {
config->DstAliases.insert(ParsePair(jDst, meta));
}
return config;
}
return {};
}
void TMetaInfo::ApplySettings(const TClientSettings& settings) {
AuthHeader_ = {{"Authorization", settings.GetAuthToken()}};
SelfAlias_ = settings.GetSelfAlias();
}
EBlackboxEnv TMetaInfo::BbEnvFromString(const TString& env, const TString& meta) {
if (env == "Prod") {
return EBlackboxEnv::Prod;
} else if (env == "Test") {
return EBlackboxEnv::Test;
} else if (env == "ProdYaTeam") {
return EBlackboxEnv::ProdYateam;
} else if (env == "TestYaTeam") {
return EBlackboxEnv::TestYateam;
} else if (env == "Stress") {
return EBlackboxEnv::Stress;
}
ythrow yexception() << "'bb_env'=='" << env << "'. " << meta;
}
}
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