// Copyright (c) 2010 Satoshi Nakamoto // Copyright (c) 2009-2016 The Bitcoin Core developers // Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. #include "rpc/server.h" #include "base58.h" #include "fs.h" #include "init.h" #include "random.h" #include "sync.h" #include "ui_interface.h" #include "util.h" #include "utilstrencodings.h" #include #include #include #include // for to_upper() #include #include #include // for unique_ptr #include static bool fRPCRunning = false; static bool fRPCInWarmup = true; static std::string rpcWarmupStatus("RPC server started"); static CCriticalSection cs_rpcWarmup; /* Timer-creating functions */ static RPCTimerInterface* timerInterface = nullptr; /* Map of name to timer. */ static std::map > deadlineTimers; static struct CRPCSignals { boost::signals2::signal Started; boost::signals2::signal Stopped; boost::signals2::signal PreCommand; } g_rpcSignals; void RPCServer::OnStarted(std::function slot) { g_rpcSignals.Started.connect(slot); } void RPCServer::OnStopped(std::function slot) { g_rpcSignals.Stopped.connect(slot); } void RPCTypeCheck(const UniValue& params, const std::list& typesExpected, bool fAllowNull) { unsigned int i = 0; for (UniValue::VType t : typesExpected) { if (params.size() <= i) break; const UniValue& v = params[i]; if (!(fAllowNull && v.isNull())) { RPCTypeCheckArgument(v, t); } i++; } } void RPCTypeCheckArgument(const UniValue& value, UniValue::VType typeExpected) { if (value.type() != typeExpected) { throw JSONRPCError(RPC_TYPE_ERROR, strprintf("Expected type %s, got %s", uvTypeName(typeExpected), uvTypeName(value.type()))); } } void RPCTypeCheckObj(const UniValue& o, const std::map& typesExpected, bool fAllowNull, bool fStrict) { for (const auto& t : typesExpected) { const UniValue& v = find_value(o, t.first); if (!fAllowNull && v.isNull()) throw JSONRPCError(RPC_TYPE_ERROR, strprintf("Missing %s", t.first)); if (!(t.second.typeAny || v.type() == t.second.type || (fAllowNull && v.isNull()))) { std::string err = strprintf("Expected type %s for %s, got %s", uvTypeName(t.second.type), t.first, uvTypeName(v.type())); throw JSONRPCError(RPC_TYPE_ERROR, err); } } if (fStrict) { for (const std::string& k : o.getKeys()) { if (typesExpected.count(k) == 0) { std::string err = strprintf("Unexpected key %s", k); throw JSONRPCError(RPC_TYPE_ERROR, err); } } } } CAmount AmountFromValue(const UniValue& value) { if (!value.isNum() && !value.isStr()) throw JSONRPCError(RPC_TYPE_ERROR, "Amount is not a number or string"); CAmount amount; if (!ParseFixedPoint(value.getValStr(), 8, &amount)) throw JSONRPCError(RPC_TYPE_ERROR, "Invalid amount"); if (!MoneyRange(amount)) throw JSONRPCError(RPC_TYPE_ERROR, "Amount out of range"); return amount; } uint256 ParseHashV(const UniValue& v, std::string strName) { std::string strHex; if (v.isStr()) strHex = v.get_str(); if (!IsHex(strHex)) // Note: IsHex("") is false throw JSONRPCError(RPC_INVALID_PARAMETER, strName+" must be hexadecimal string (not '"+strHex+"')"); if (64 != strHex.length()) throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("%s must be of length %d (not %d)", strName, 64, strHex.length())); uint256 result; result.SetHex(strHex); return result; } uint256 ParseHashO(const UniValue& o, std::string strKey) { return ParseHashV(find_value(o, strKey), strKey); } std::vector ParseHexV(const UniValue& v, std::string strName) { std::string strHex; if (v.isStr()) strHex = v.get_str(); if (!IsHex(strHex)) throw JSONRPCError(RPC_INVALID_PARAMETER, strName+" must be hexadecimal string (not '"+strHex+"')"); return ParseHex(strHex); } std::vector ParseHexO(const UniValue& o, std::string strKey) { return ParseHexV(find_value(o, strKey), strKey); } /** * Note: This interface may still be subject to change. */ std::string CRPCTable::help(const std::string& strCommand, const JSONRPCRequest& helpreq) const { std::string strRet; std::string category; std::set setDone; std::vector > vCommands; for (std::map::const_iterator mi = mapCommands.begin(); mi != mapCommands.end(); ++mi) vCommands.push_back(make_pair(mi->second->category + mi->first, mi->second)); sort(vCommands.begin(), vCommands.end()); JSONRPCRequest jreq(helpreq); jreq.fHelp = true; jreq.params = UniValue(); for (const std::pair& command : vCommands) { const CRPCCommand *pcmd = command.second; std::string strMethod = pcmd->name; if ((strCommand != "" || pcmd->category == "hidden") && strMethod != strCommand) continue; jreq.strMethod = strMethod; try { rpcfn_type pfn = pcmd->actor; if (setDone.insert(pfn).second) (*pfn)(jreq); } catch (const std::exception& e) { // Help text is returned in an exception std::string strHelp = std::string(e.what()); if (strCommand == "") { if (strHelp.find('\n') != std::string::npos) strHelp = strHelp.substr(0, strHelp.find('\n')); if (category != pcmd->category) { if (!category.empty()) strRet += "\n"; category = pcmd->category; std::string firstLetter = category.substr(0,1); boost::to_upper(firstLetter); strRet += "== " + firstLetter + category.substr(1) + " ==\n"; } } strRet += strHelp + "\n"; } } if (strRet == "") strRet = strprintf("help: unknown command: %s\n", strCommand); strRet = strRet.substr(0,strRet.size()-1); return strRet; } UniValue help(const JSONRPCRequest& jsonRequest) { if (jsonRequest.fHelp || jsonRequest.params.size() > 1) throw std::runtime_error( "help ( \"command\" )\n" "\nList all commands, or get help for a specified command.\n" "\nArguments:\n" "1. \"command\" (string, optional) The command to get help on\n" "\nResult:\n" "\"text\" (string) The help text\n" ); std::string strCommand; if (jsonRequest.params.size() > 0) strCommand = jsonRequest.params[0].get_str(); return tableRPC.help(strCommand, jsonRequest); } UniValue stop(const JSONRPCRequest& jsonRequest) { // Accept the deprecated and ignored 'detach' boolean argument if (jsonRequest.fHelp || jsonRequest.params.size() > 1) throw std::runtime_error( "stop\n" "\nStop Bitcoin server."); // Event loop will exit after current HTTP requests have been handled, so // this reply will get back to the client. StartShutdown(); return "Bitcoin server stopping"; } UniValue uptime(const JSONRPCRequest& jsonRequest) { if (jsonRequest.fHelp || jsonRequest.params.size() > 1) throw std::runtime_error( "uptime\n" "\nReturns the total uptime of the server.\n" "\nResult:\n" "ttt (numeric) The number of seconds that the server has been running\n" "\nExamples:\n" + HelpExampleCli("uptime", "") + HelpExampleRpc("uptime", "") ); return GetTime() - GetStartupTime(); } /** * Call Table */ static const CRPCCommand vRPCCommands[] = { // category name actor (function) argNames // --------------------- ------------------------ ----------------------- ---------- /* Overall control/query calls */ { "control", "help", &help, {"command"} }, { "control", "stop", &stop, {} }, { "control", "uptime", &uptime, {} }, }; CRPCTable::CRPCTable() { unsigned int vcidx; for (vcidx = 0; vcidx < (sizeof(vRPCCommands) / sizeof(vRPCCommands[0])); vcidx++) { const CRPCCommand *pcmd; pcmd = &vRPCCommands[vcidx]; mapCommands[pcmd->name] = pcmd; } } const CRPCCommand *CRPCTable::operator[](const std::string &name) const { std::map::const_iterator it = mapCommands.find(name); if (it == mapCommands.end()) return nullptr; return (*it).second; } bool CRPCTable::appendCommand(const std::string& name, const CRPCCommand* pcmd) { if (IsRPCRunning()) return false; // don't allow overwriting for now std::map::const_iterator it = mapCommands.find(name); if (it != mapCommands.end()) return false; mapCommands[name] = pcmd; return true; } bool StartRPC() { LogPrint(BCLog::RPC, "Starting RPC\n"); fRPCRunning = true; g_rpcSignals.Started(); return true; } void InterruptRPC() { LogPrint(BCLog::RPC, "Interrupting RPC\n"); // Interrupt e.g. running longpolls fRPCRunning = false; } void StopRPC() { LogPrint(BCLog::RPC, "Stopping RPC\n"); deadlineTimers.clear(); DeleteAuthCookie(); g_rpcSignals.Stopped(); } bool IsRPCRunning() { return fRPCRunning; } void SetRPCWarmupStatus(const std::string& newStatus) { LOCK(cs_rpcWarmup); rpcWarmupStatus = newStatus; } void SetRPCWarmupFinished() { LOCK(cs_rpcWarmup); assert(fRPCInWarmup); fRPCInWarmup = false; } bool RPCIsInWarmup(std::string *outStatus) { LOCK(cs_rpcWarmup); if (outStatus) *outStatus = rpcWarmupStatus; return fRPCInWarmup; } void JSONRPCRequest::parse(const UniValue& valRequest) { // Parse request if (!valRequest.isObject()) throw JSONRPCError(RPC_INVALID_REQUEST, "Invalid Request object"); const UniValue& request = valRequest.get_obj(); // Parse id now so errors from here on will have the id id = find_value(request, "id"); // Parse method UniValue valMethod = find_value(request, "method"); if (valMethod.isNull()) throw JSONRPCError(RPC_INVALID_REQUEST, "Missing method"); if (!valMethod.isStr()) throw JSONRPCError(RPC_INVALID_REQUEST, "Method must be a string"); strMethod = valMethod.get_str(); LogPrint(BCLog::RPC, "ThreadRPCServer method=%s\n", SanitizeString(strMethod)); // Parse params UniValue valParams = find_value(request, "params"); if (valParams.isArray() || valParams.isObject()) params = valParams; else if (valParams.isNull()) params = UniValue(UniValue::VARR); else throw JSONRPCError(RPC_INVALID_REQUEST, "Params must be an array or object"); } bool IsDeprecatedRPCEnabled(const std::string& method) { const std::vector enabled_methods = gArgs.GetArgs("-deprecatedrpc"); return find(enabled_methods.begin(), enabled_methods.end(), method) != enabled_methods.end(); } static UniValue JSONRPCExecOne(const UniValue& req) { UniValue rpc_result(UniValue::VOBJ); JSONRPCRequest jreq; try { jreq.parse(req); UniValue result = tableRPC.execute(jreq); rpc_result = JSONRPCReplyObj(result, NullUniValue, jreq.id); } catch (const UniValue& objError) { rpc_result = JSONRPCReplyObj(NullUniValue, objError, jreq.id); } catch (const std::exception& e) { rpc_result = JSONRPCReplyObj(NullUniValue, JSONRPCError(RPC_PARSE_ERROR, e.what()), jreq.id); } return rpc_result; } std::string JSONRPCExecBatch(const UniValue& vReq) { UniValue ret(UniValue::VARR); for (unsigned int reqIdx = 0; reqIdx < vReq.size(); reqIdx++) ret.push_back(JSONRPCExecOne(vReq[reqIdx])); return ret.write() + "\n"; } /** * Process named arguments into a vector of positional arguments, based on the * passed-in specification for the RPC call's arguments. */ static inline JSONRPCRequest transformNamedArguments(const JSONRPCRequest& in, const std::vector& argNames) { JSONRPCRequest out = in; out.params = UniValue(UniValue::VARR); // Build a map of parameters, and remove ones that have been processed, so that we can throw a focused error if // there is an unknown one. const std::vector& keys = in.params.getKeys(); const std::vector& values = in.params.getValues(); std::unordered_map argsIn; for (size_t i=0; i vargNames; boost::algorithm::split(vargNames, argNamePattern, boost::algorithm::is_any_of("|")); auto fr = argsIn.end(); for (const std::string & argName : vargNames) { fr = argsIn.find(argName); if (fr != argsIn.end()) { break; } } if (fr != argsIn.end()) { for (int i = 0; i < hole; ++i) { // Fill hole between specified parameters with JSON nulls, // but not at the end (for backwards compatibility with calls // that act based on number of specified parameters). out.params.push_back(UniValue()); } hole = 0; out.params.push_back(*fr->second); argsIn.erase(fr); } else { hole += 1; } } // If there are still arguments in the argsIn map, this is an error. if (!argsIn.empty()) { throw JSONRPCError(RPC_INVALID_PARAMETER, "Unknown named parameter " + argsIn.begin()->first); } // Return request with named arguments transformed to positional arguments return out; } UniValue CRPCTable::execute(const JSONRPCRequest &request) const { // Return immediately if in warmup { LOCK(cs_rpcWarmup); if (fRPCInWarmup) throw JSONRPCError(RPC_IN_WARMUP, rpcWarmupStatus); } // Find method const CRPCCommand *pcmd = tableRPC[request.strMethod]; if (!pcmd) throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Method not found"); g_rpcSignals.PreCommand(*pcmd); try { // Execute, convert arguments to array if necessary if (request.params.isObject()) { return pcmd->actor(transformNamedArguments(request, pcmd->argNames)); } else { return pcmd->actor(request); } } catch (const std::exception& e) { throw JSONRPCError(RPC_MISC_ERROR, e.what()); } } std::vector CRPCTable::listCommands() const { std::vector commandList; typedef std::map commandMap; std::transform( mapCommands.begin(), mapCommands.end(), std::back_inserter(commandList), boost::bind(&commandMap::value_type::first,_1) ); return commandList; } std::string HelpExampleCli(const std::string& methodname, const std::string& args) { return "> bitcoin-cli " + methodname + " " + args + "\n"; } std::string HelpExampleRpc(const std::string& methodname, const std::string& args) { return "> curl --user myusername --data-binary '{\"jsonrpc\": \"1.0\", \"id\":\"curltest\", " "\"method\": \"" + methodname + "\", \"params\": [" + args + "] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/\n"; } void RPCSetTimerInterfaceIfUnset(RPCTimerInterface *iface) { if (!timerInterface) timerInterface = iface; } void RPCSetTimerInterface(RPCTimerInterface *iface) { timerInterface = iface; } void RPCUnsetTimerInterface(RPCTimerInterface *iface) { if (timerInterface == iface) timerInterface = nullptr; } void RPCRunLater(const std::string& name, std::function func, int64_t nSeconds) { if (!timerInterface) throw JSONRPCError(RPC_INTERNAL_ERROR, "No timer handler registered for RPC"); deadlineTimers.erase(name); LogPrint(BCLog::RPC, "queue run of timer %s in %i seconds (using %s)\n", name, nSeconds, timerInterface->Name()); deadlineTimers.emplace(name, std::unique_ptr(timerInterface->NewTimer(func, nSeconds*1000))); } int RPCSerializationFlags() { int flag = 0; if (gArgs.GetArg("-rpcserialversion", DEFAULT_RPC_SERIALIZE_VERSION) == 0) flag |= SERIALIZE_TRANSACTION_NO_WITNESS; return flag; } CRPCTable tableRPC;