bitcoinrpc.cpp
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bitcoinrpc.cpp
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	// Copyright (c) 2010 Satoshi Nakamoto
	// Copyright (c) 2009-2012 The Bitcoin developers
	// Distributed under the MIT/X11 software license, see the accompanying
	// file COPYING or http://www.opensource.org/licenses/mit-license.php.

	#include "init.h"
	#include "util.h"
	#include "sync.h"
	#include "ui_interface.h"
	#include "base58.h"
	#include "bitcoinrpc.h"
	#include "db.h"

	#include <boost/algorithm/string.hpp>
	#include <boost/asio.hpp>
	#include <boost/asio/ip/v6_only.hpp>
	#include <boost/asio/ssl.hpp>
	#include <boost/bind.hpp>
	#include <boost/filesystem.hpp>
	#include <boost/filesystem/fstream.hpp>
	#include <boost/foreach.hpp>
	#include <boost/iostreams/concepts.hpp>
	#include <boost/iostreams/stream.hpp>
	#include <boost/lexical_cast.hpp>
	#include <boost/shared_ptr.hpp>
	#include <list>

	using namespace std;
	using namespace boost;
	using namespace boost::asio;
	using namespace json_spirit;

	static std::string strRPCUserColonPass;

	// These are created by StartRPCThreads, destroyed in StopRPCThreads
	static asio::io_service* rpc_io_service = NULL;
	static map<string, boost::shared_ptr<deadline_timer> > deadlineTimers;
	static ssl::context* rpc_ssl_context = NULL;
	static boost::thread_group* rpc_worker_group = NULL;

	static inline unsigned short GetDefaultRPCPort()
	{
	return GetBoolArg("-testnet", false) ? 18332 : 8332;
	}

	Object JSONRPCError(int code, const string& message)
	{
	Object error;
	error.push_back(Pair("code", code));
	error.push_back(Pair("message", message));
	return error;
	}

	void RPCTypeCheck(const Array& params,
	const list<Value_type>& typesExpected,
	bool fAllowNull)
	{
	unsigned int i = 0;
	BOOST_FOREACH(Value_type t, typesExpected)
	{
	if (params.size() <= i)
	break;

	const Value& v = params[i];
	if (!((v.type() == t) \|\| (fAllowNull && (v.type() == null_type))))
	{
	string err = strprintf("Expected type %s, got %s",
	Value_type_name[t], Value_type_name[v.type()]);
	throw JSONRPCError(RPC_TYPE_ERROR, err);
	}
	i++;
	}
	}

	void RPCTypeCheck(const Object& o,
	const map<string, Value_type>& typesExpected,
	bool fAllowNull)
	{
	BOOST_FOREACH(const PAIRTYPE(string, Value_type)& t, typesExpected)
	{
	const Value& v = find_value(o, t.first);
	if (!fAllowNull && v.type() == null_type)
	throw JSONRPCError(RPC_TYPE_ERROR, strprintf("Missing %s", t.first.c_str()));

	if (!((v.type() == t.second) \|\| (fAllowNull && (v.type() == null_type))))
	{
	string err = strprintf("Expected type %s for %s, got %s",
	Value_type_name[t.second], t.first.c_str(), Value_type_name[v.type()]);
	throw JSONRPCError(RPC_TYPE_ERROR, err);
	}
	}
	}

	int64 AmountFromValue(const Value& value)
	{
	double dAmount = value.get_real();
	if (dAmount <= 0.0 \|\| dAmount > 21000000.0)
	throw JSONRPCError(RPC_TYPE_ERROR, "Invalid amount");
	int64 nAmount = roundint64(dAmount * COIN);
	if (!MoneyRange(nAmount))
	throw JSONRPCError(RPC_TYPE_ERROR, "Invalid amount");
	return nAmount;
	}

	Value ValueFromAmount(int64 amount)
	{
	return (double)amount / (double)COIN;
	}

	std::string HexBits(unsigned int nBits)
	{
	union {
	int32_t nBits;
	char cBits[4];
	} uBits;
	uBits.nBits = htonl((int32_t)nBits);
	return HexStr(BEGIN(uBits.cBits), END(uBits.cBits));
	}



	///
	/// Note: This interface may still be subject to change.
	///

	string CRPCTable::help(string strCommand) const
	{
	string strRet;
	set<rpcfn_type> setDone;
	for (map<string, const CRPCCommand*>::const_iterator mi = mapCommands.begin(); mi != mapCommands.end(); ++mi)
	{
	const CRPCCommand *pcmd = mi->second;
	string strMethod = mi->first;
	// We already filter duplicates, but these deprecated screw up the sort order
	if (strMethod.find("label") != string::npos)
	continue;
	if (strCommand != "" && strMethod != strCommand)
	continue;
	try
	{
	Array params;
	rpcfn_type pfn = pcmd->actor;
	if (setDone.insert(pfn).second)
	(*pfn)(params, true);
	}
	catch (std::exception& e)
	{
	// Help text is returned in an exception
	string strHelp = string(e.what());
	if (strCommand == "")
	if (strHelp.find('\n') != string::npos)
	strHelp = strHelp.substr(0, strHelp.find('\n'));
	strRet += strHelp + "\n";
	}
	}
	if (strRet == "")
	strRet = strprintf("help: unknown command: %s\n", strCommand.c_str());
	strRet = strRet.substr(0,strRet.size()-1);
	return strRet;
	}

	Value help(const Array& params, bool fHelp)
	{
	if (fHelp \|\| params.size() > 1)
	throw runtime_error(
	"help [command]\n"
	"List commands, or get help for a command.");

	string strCommand;
	if (params.size() > 0)
	strCommand = params[0].get_str();

	return tableRPC.help(strCommand);
	}


	Value stop(const Array& params, bool fHelp)
	{
	// Accept the deprecated and ignored 'detach' boolean argument
	if (fHelp \|\| params.size() > 1)
	throw runtime_error(
	"stop\n"
	"Stop Bitcoin server.");
	// Shutdown will take long enough that the response should get back
	StartShutdown();
	return "Bitcoin server stopping";
	}



	//
	// Call Table
	//


	static const CRPCCommand vRPCCommands[] =
	{ // name actor (function) okSafeMode threadSafe
	// ------------------------ ----------------------- ---------- ----------
	{ "help", &help, true, true },
	{ "stop", &stop, true, true },
	{ "getblockcount", &getblockcount, true, false },
	{ "getconnectioncount", &getconnectioncount, true, false },
	{ "getpeerinfo", &getpeerinfo, true, false },
	{ "addnode", &addnode, true, true },
	{ "getaddednodeinfo", &getaddednodeinfo, true, true },
	{ "getdifficulty", &getdifficulty, true, false },
	{ "getgenerate", &getgenerate, true, false },
	{ "setgenerate", &setgenerate, true, false },
	{ "gethashespersec", &gethashespersec, true, false },
	{ "getinfo", &getinfo, true, false },
	{ "getmininginfo", &getmininginfo, true, false },
	{ "getnewaddress", &getnewaddress, true, false },
	{ "getaccountaddress", &getaccountaddress, true, false },
	{ "setaccount", &setaccount, true, false },
	{ "getaccount", &getaccount, false, false },
	{ "getaddressesbyaccount", &getaddressesbyaccount, true, false },
	{ "sendtoaddress", &sendtoaddress, false, false },
	{ "getreceivedbyaddress", &getreceivedbyaddress, false, false },
	{ "getreceivedbyaccount", &getreceivedbyaccount, false, false },
	{ "listreceivedbyaddress", &listreceivedbyaddress, false, false },
	{ "listreceivedbyaccount", &listreceivedbyaccount, false, false },
	{ "backupwallet", &backupwallet, true, false },
	{ "keypoolrefill", &keypoolrefill, true, false },
	{ "walletpassphrase", &walletpassphrase, true, false },
	{ "walletpassphrasechange", &walletpassphrasechange, false, false },
	{ "walletlock", &walletlock, true, false },
	{ "encryptwallet", &encryptwallet, false, false },
	{ "validateaddress", &validateaddress, true, false },
	{ "getbalance", &getbalance, false, false },
	{ "move", &movecmd, false, false },
	{ "sendfrom", &sendfrom, false, false },
	{ "sendmany", &sendmany, false, false },
	{ "addmultisigaddress", &addmultisigaddress, false, false },
	{ "createmultisig", &createmultisig, true, true },
	{ "getrawmempool", &getrawmempool, true, false },
	{ "getblock", &getblock, false, false },
	{ "getblockhash", &getblockhash, false, false },
	{ "gettransaction", &gettransaction, false, false },
	{ "listtransactions", &listtransactions, false, false },
	{ "listaddressgroupings", &listaddressgroupings, false, false },
	{ "signmessage", &signmessage, false, false },
	{ "verifymessage", &verifymessage, false, false },
	{ "getwork", &getwork, true, false },
	{ "listaccounts", &listaccounts, false, false },
	{ "settxfee", &settxfee, false, false },
	{ "getblocktemplate", &getblocktemplate, true, false },
	{ "submitblock", &submitblock, false, false },
	{ "listsinceblock", &listsinceblock, false, false },
	{ "dumpprivkey", &dumpprivkey, true, false },
	{ "importprivkey", &importprivkey, false, false },
	{ "listunspent", &listunspent, false, false },
	{ "getrawtransaction", &getrawtransaction, false, false },
	{ "createrawtransaction", &createrawtransaction, false, false },
	{ "decoderawtransaction", &decoderawtransaction, false, false },
	{ "signrawtransaction", &signrawtransaction, false, false },
	{ "sendrawtransaction", &sendrawtransaction, false, false },
	{ "gettxoutsetinfo", &gettxoutsetinfo, true, false },
	{ "gettxout", &gettxout, true, false },
	{ "lockunspent", &lockunspent, false, false },
	{ "listlockunspent", &listlockunspent, false, false },
	};

	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[](string name) const
	{
	map<string, const CRPCCommand*>::const_iterator it = mapCommands.find(name);
	if (it == mapCommands.end())
	return NULL;
	return (*it).second;
	}

	//
	// HTTP protocol
	//
	// This ain't Apache. We're just using HTTP header for the length field
	// and to be compatible with other JSON-RPC implementations.
	//

	string HTTPPost(const string& strMsg, const map<string,string>& mapRequestHeaders)
	{
	ostringstream s;
	s << "POST / HTTP/1.1\r\n"
	<< "User-Agent: bitcoin-json-rpc/" << FormatFullVersion() << "\r\n"
	<< "Host: 127.0.0.1\r\n"
	<< "Content-Type: application/json\r\n"
	<< "Content-Length: " << strMsg.size() << "\r\n"
	<< "Connection: close\r\n"
	<< "Accept: application/json\r\n";
	BOOST_FOREACH(const PAIRTYPE(string, string)& item, mapRequestHeaders)
	s << item.first << ": " << item.second << "\r\n";
	s << "\r\n" << strMsg;

	return s.str();
	}

	string rfc1123Time()
	{
	char buffer[64];
	time_t now;
	time(&now);
	struct tm* now_gmt = gmtime(&now);
	string locale(setlocale(LC_TIME, NULL));
	setlocale(LC_TIME, "C"); // we want POSIX (aka "C") weekday/month strings
	strftime(buffer, sizeof(buffer), "%a, %d %b %Y %H:%M:%S +0000", now_gmt);
	setlocale(LC_TIME, locale.c_str());
	return string(buffer);
	}

	static string HTTPReply(int nStatus, const string& strMsg, bool keepalive)
	{
	if (nStatus == HTTP_UNAUTHORIZED)
	return strprintf("HTTP/1.0 401 Authorization Required\r\n"
	"Date: %s\r\n"
	"Server: bitcoin-json-rpc/%s\r\n"
	"WWW-Authenticate: Basic realm=\"jsonrpc\"\r\n"
	"Content-Type: text/html\r\n"
	"Content-Length: 296\r\n"
	"\r\n"
	"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\"\r\n"
	"\"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd\">\r\n"
	"<HTML>\r\n"
	"<HEAD>\r\n"
	"<TITLE>Error</TITLE>\r\n"
	"<META HTTP-EQUIV='Content-Type' CONTENT='text/html; charset=ISO-8859-1'>\r\n"
	"</HEAD>\r\n"
	"<BODY><H1>401 Unauthorized.</H1></BODY>\r\n"
	"</HTML>\r\n", rfc1123Time().c_str(), FormatFullVersion().c_str());
	const char *cStatus;
	if (nStatus == HTTP_OK) cStatus = "OK";
	else if (nStatus == HTTP_BAD_REQUEST) cStatus = "Bad Request";
	else if (nStatus == HTTP_FORBIDDEN) cStatus = "Forbidden";
	else if (nStatus == HTTP_NOT_FOUND) cStatus = "Not Found";
	else if (nStatus == HTTP_INTERNAL_SERVER_ERROR) cStatus = "Internal Server Error";
	else cStatus = "";
	return strprintf(
	"HTTP/1.1 %d %s\r\n"
	"Date: %s\r\n"
	"Connection: %s\r\n"
	"Content-Length: %"PRIszu"\r\n"
	"Content-Type: application/json\r\n"
	"Server: bitcoin-json-rpc/%s\r\n"
	"\r\n"
	"%s",
	nStatus,
	cStatus,
	rfc1123Time().c_str(),
	keepalive ? "keep-alive" : "close",
	strMsg.size(),
	FormatFullVersion().c_str(),
	strMsg.c_str());
	}

	bool ReadHTTPRequestLine(std::basic_istream<char>& stream, int &proto,
	string& http_method, string& http_uri)
	{
	string str;
	getline(stream, str);

	// HTTP request line is space-delimited
	vector<string> vWords;
	boost::split(vWords, str, boost::is_any_of(" "));
	if (vWords.size() < 2)
	return false;

	// HTTP methods permitted: GET, POST
	http_method = vWords[0];
	if (http_method != "GET" && http_method != "POST")
	return false;

	// HTTP URI must be an absolute path, relative to current host
	http_uri = vWords[1];
	if (http_uri.size() == 0 \|\| http_uri[0] != '/')
	return false;

	// parse proto, if present
	string strProto = "";
	if (vWords.size() > 2)
	strProto = vWords[2];

	proto = 0;
	const char *ver = strstr(strProto.c_str(), "HTTP/1.");
	if (ver != NULL)
	proto = atoi(ver+7);

	return true;
	}

	int ReadHTTPStatus(std::basic_istream<char>& stream, int &proto)
	{
	string str;
	getline(stream, str);
	vector<string> vWords;
	boost::split(vWords, str, boost::is_any_of(" "));
	if (vWords.size() < 2)
	return HTTP_INTERNAL_SERVER_ERROR;
	proto = 0;
	const char *ver = strstr(str.c_str(), "HTTP/1.");
	if (ver != NULL)
	proto = atoi(ver+7);
	return atoi(vWords[1].c_str());
	}

	int ReadHTTPHeaders(std::basic_istream<char>& stream, map<string, string>& mapHeadersRet)
	{
	int nLen = 0;
	loop
	{
	string str;
	std::getline(stream, str);
	if (str.empty() \|\| str == "\r")
	break;
	string::size_type nColon = str.find(":");
	if (nColon != string::npos)
	{
	string strHeader = str.substr(0, nColon);
	boost::trim(strHeader);
	boost::to_lower(strHeader);
	string strValue = str.substr(nColon+1);
	boost::trim(strValue);
	mapHeadersRet[strHeader] = strValue;
	if (strHeader == "content-length")
	nLen = atoi(strValue.c_str());
	}
	}
	return nLen;
	}

	int ReadHTTPMessage(std::basic_istream<char>& stream, map<string,
	string>& mapHeadersRet, string& strMessageRet,
	int nProto)
	{
	mapHeadersRet.clear();
	strMessageRet = "";

	// Read header
	int nLen = ReadHTTPHeaders(stream, mapHeadersRet);
	if (nLen < 0 \|\| nLen > (int)MAX_SIZE)
	return HTTP_INTERNAL_SERVER_ERROR;

	// Read message
	if (nLen > 0)
	{
	vector<char> vch(nLen);
	stream.read(&vch[0], nLen);
	strMessageRet = string(vch.begin(), vch.end());
	}

	string sConHdr = mapHeadersRet["connection"];

	if ((sConHdr != "close") && (sConHdr != "keep-alive"))
	{
	if (nProto >= 1)
	mapHeadersRet["connection"] = "keep-alive";
	else
	mapHeadersRet["connection"] = "close";
	}

	return HTTP_OK;
	}

	bool HTTPAuthorized(map<string, string>& mapHeaders)
	{
	string strAuth = mapHeaders["authorization"];
	if (strAuth.substr(0,6) != "Basic ")
	return false;
	string strUserPass64 = strAuth.substr(6); boost::trim(strUserPass64);
	string strUserPass = DecodeBase64(strUserPass64);
	return strUserPass == strRPCUserColonPass;
	}

	//
	// JSON-RPC protocol. Bitcoin speaks version 1.0 for maximum compatibility,
	// but uses JSON-RPC 1.1/2.0 standards for parts of the 1.0 standard that were
	// unspecified (HTTP errors and contents of 'error').
	//
	// 1.0 spec: http://json-rpc.org/wiki/specification
	// 1.2 spec: http://groups.google.com/group/json-rpc/web/json-rpc-over-http
	// http://www.codeproject.com/KB/recipes/JSON_Spirit.aspx
	//

	string JSONRPCRequest(const string& strMethod, const Array& params, const Value& id)
	{
	Object request;
	request.push_back(Pair("method", strMethod));
	request.push_back(Pair("params", params));
	request.push_back(Pair("id", id));
	return write_string(Value(request), false) + "\n";
	}

	Object JSONRPCReplyObj(const Value& result, const Value& error, const Value& id)
	{
	Object reply;
	if (error.type() != null_type)
	reply.push_back(Pair("result", Value::null));
	else
	reply.push_back(Pair("result", result));
	reply.push_back(Pair("error", error));
	reply.push_back(Pair("id", id));
	return reply;
	}

	string JSONRPCReply(const Value& result, const Value& error, const Value& id)
	{
	Object reply = JSONRPCReplyObj(result, error, id);
	return write_string(Value(reply), false) + "\n";
	}

	void ErrorReply(std::ostream& stream, const Object& objError, const Value& id)
	{
	// Send error reply from json-rpc error object
	int nStatus = HTTP_INTERNAL_SERVER_ERROR;
	int code = find_value(objError, "code").get_int();
	if (code == RPC_INVALID_REQUEST) nStatus = HTTP_BAD_REQUEST;
	else if (code == RPC_METHOD_NOT_FOUND) nStatus = HTTP_NOT_FOUND;
	string strReply = JSONRPCReply(Value::null, objError, id);
	stream << HTTPReply(nStatus, strReply, false) << std::flush;
	}

	bool ClientAllowed(const boost::asio::ip::address& address)
	{
	// Make sure that IPv4-compatible and IPv4-mapped IPv6 addresses are treated as IPv4 addresses
	if (address.is_v6()
	&& (address.to_v6().is_v4_compatible()
	\|\| address.to_v6().is_v4_mapped()))
	return ClientAllowed(address.to_v6().to_v4());

	if (address == asio::ip::address_v4::loopback()
	\|\| address == asio::ip::address_v6::loopback()
	\|\| (address.is_v4()
	// Check whether IPv4 addresses match 127.0.0.0/8 (loopback subnet)
	&& (address.to_v4().to_ulong() & 0xff000000) == 0x7f000000))
	return true;

	const string strAddress = address.to_string();
	const vector<string>& vAllow = mapMultiArgs["-rpcallowip"];
	BOOST_FOREACH(string strAllow, vAllow)
	if (WildcardMatch(strAddress, strAllow))
	return true;
	return false;
	}

	//
	// IOStream device that speaks SSL but can also speak non-SSL
	//
	template <typename Protocol>
	class SSLIOStreamDevice : public iostreams::device<iostreams::bidirectional> {
	public:
	SSLIOStreamDevice(asio::ssl::stream<typename Protocol::socket> &streamIn, bool fUseSSLIn) : stream(streamIn)
	{
	fUseSSL = fUseSSLIn;
	fNeedHandshake = fUseSSLIn;
	}

	void handshake(ssl::stream_base::handshake_type role)
	{
	if (!fNeedHandshake) return;
	fNeedHandshake = false;
	stream.handshake(role);
	}
	std::streamsize read(char* s, std::streamsize n)
	{
	handshake(ssl::stream_base::server); // HTTPS servers read first
	if (fUseSSL) return stream.read_some(asio::buffer(s, n));
	return stream.next_layer().read_some(asio::buffer(s, n));
	}
	std::streamsize write(const char* s, std::streamsize n)
	{
	handshake(ssl::stream_base::client); // HTTPS clients write first
	if (fUseSSL) return asio::write(stream, asio::buffer(s, n));
	return asio::write(stream.next_layer(), asio::buffer(s, n));
	}
	bool connect(const std::string& server, const std::string& port)
	{
	ip::tcp::resolver resolver(stream.get_io_service());
	ip::tcp::resolver::query query(server.c_str(), port.c_str());
	ip::tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);
	ip::tcp::resolver::iterator end;
	boost::system::error_code error = asio::error::host_not_found;
	while (error && endpoint_iterator != end)
	{
	stream.lowest_layer().close();
	stream.lowest_layer().connect(*endpoint_iterator++, error);
	}
	if (error)
	return false;
	return true;
	}

	private:
	bool fNeedHandshake;
	bool fUseSSL;
	asio::ssl::stream<typename Protocol::socket>& stream;
	};

	class AcceptedConnection
	{
	public:
	virtual ~AcceptedConnection() {}

	virtual std::iostream& stream() = 0;
	virtual std::string peer_address_to_string() const = 0;
	virtual void close() = 0;
	};

	template <typename Protocol>
	class AcceptedConnectionImpl : public AcceptedConnection
	{
	public:
	AcceptedConnectionImpl(
	asio::io_service& io_service,
	ssl::context &context,
	bool fUseSSL) :
	sslStream(io_service, context),
	_d(sslStream, fUseSSL),
	_stream(_d)
	{
	}

	virtual std::iostream& stream()
	{
	return _stream;
	}

	virtual std::string peer_address_to_string() const
	{
	return peer.address().to_string();
	}

	virtual void close()
	{
	_stream.close();
	}

	typename Protocol::endpoint peer;
	asio::ssl::stream<typename Protocol::socket> sslStream;

	private:
	SSLIOStreamDevice<Protocol> _d;
	iostreams::stream< SSLIOStreamDevice<Protocol> > _stream;
	};

	void ServiceConnection(AcceptedConnection *conn);

	// Forward declaration required for RPCListen
	template <typename Protocol, typename SocketAcceptorService>
	static void RPCAcceptHandler(boost::shared_ptr< basic_socket_acceptor<Protocol, SocketAcceptorService> > acceptor,
	ssl::context& context,
	bool fUseSSL,
	AcceptedConnection* conn,
	const boost::system::error_code& error);

	/**
	* Sets up I/O resources to accept and handle a new connection.
	*/
	template <typename Protocol, typename SocketAcceptorService>
	static void RPCListen(boost::shared_ptr< basic_socket_acceptor<Protocol, SocketAcceptorService> > acceptor,
	ssl::context& context,
	const bool fUseSSL)
	{
	// Accept connection
	AcceptedConnectionImpl<Protocol>* conn = new AcceptedConnectionImpl<Protocol>(acceptor->get_io_service(), context, fUseSSL);

	acceptor->async_accept(
	conn->sslStream.lowest_layer(),
	conn->peer,
	boost::bind(&RPCAcceptHandler<Protocol, SocketAcceptorService>,
	acceptor,
	boost::ref(context),
	fUseSSL,
	conn,
	boost::asio::placeholders::error));
	}

	/**
	* Accept and handle incoming connection.
	*/
	template <typename Protocol, typename SocketAcceptorService>
	static void RPCAcceptHandler(boost::shared_ptr< basic_socket_acceptor<Protocol, SocketAcceptorService> > acceptor,
	ssl::context& context,
	const bool fUseSSL,
	AcceptedConnection* conn,
	const boost::system::error_code& error)
	{
	// Immediately start accepting new connections, except when we're cancelled or our socket is closed.
	if (error != asio::error::operation_aborted && acceptor->is_open())
	RPCListen(acceptor, context, fUseSSL);

	AcceptedConnectionImpl<ip::tcp>* tcp_conn = dynamic_cast< AcceptedConnectionImpl<ip::tcp>* >(conn);

	// TODO: Actually handle errors
	if (error)
	{
	delete conn;
	}

	// Restrict callers by IP. It is important to
	// do this before starting client thread, to filter out
	// certain DoS and misbehaving clients.
	else if (tcp_conn && !ClientAllowed(tcp_conn->peer.address()))
	{
	// Only send a 403 if we're not using SSL to prevent a DoS during the SSL handshake.
	if (!fUseSSL)
	conn->stream() << HTTPReply(HTTP_FORBIDDEN, "", false) << std::flush;
	delete conn;
	}
	else {
	ServiceConnection(conn);
	conn->close();
	delete conn;
	}
	}

	void StartRPCThreads()
	{
	strRPCUserColonPass = mapArgs["-rpcuser"] + ":" + mapArgs["-rpcpassword"];
	if ((mapArgs["-rpcpassword"] == "") \|\|
	(mapArgs["-rpcuser"] == mapArgs["-rpcpassword"]))
	{
	unsigned char rand_pwd[32];
	RAND_bytes(rand_pwd, 32);
	string strWhatAmI = "To use bitcoind";
	if (mapArgs.count("-server"))
	strWhatAmI = strprintf(_("To use the %s option"), "\"-server\"");
	else if (mapArgs.count("-daemon"))
	strWhatAmI = strprintf(_("To use the %s option"), "\"-daemon\"");
	uiInterface.ThreadSafeMessageBox(strprintf(
	_("%s, you must set a rpcpassword in the configuration file:\n"
	"%s\n"
	"It is recommended you use the following random password:\n"
	"rpcuser=bitcoinrpc\n"
	"rpcpassword=%s\n"
	"(you do not need to remember this password)\n"
	"The username and password MUST NOT be the same.\n"
	"If the file does not exist, create it with owner-readable-only file permissions.\n"
	"It is also recommended to set alertnotify so you are notified of problems;\n"
	"for example: alertnotify=echo %%s \| mail -s \"Bitcoin Alert\" admin@foo.com\n"),
	strWhatAmI.c_str(),
	GetConfigFile().string().c_str(),
	EncodeBase58(&rand_pwd[0],&rand_pwd[0]+32).c_str()),
	"", CClientUIInterface::MSG_ERROR);
	StartShutdown();
	return;
	}

	assert(rpc_io_service == NULL);
	rpc_io_service = new asio::io_service();
	rpc_ssl_context = new ssl::context(*rpc_io_service, ssl::context::sslv23);

	const bool fUseSSL = GetBoolArg("-rpcssl");

	if (fUseSSL)
	{
	rpc_ssl_context->set_options(ssl::context::no_sslv2);

	filesystem::path pathCertFile(GetArg("-rpcsslcertificatechainfile", "server.cert"));
	if (!pathCertFile.is_complete()) pathCertFile = filesystem::path(GetDataDir()) / pathCertFile;
	if (filesystem::exists(pathCertFile)) rpc_ssl_context->use_certificate_chain_file(pathCertFile.string());
	else printf("ThreadRPCServer ERROR: missing server certificate file %s\n", pathCertFile.string().c_str());

	filesystem::path pathPKFile(GetArg("-rpcsslprivatekeyfile", "server.pem"));
	if (!pathPKFile.is_complete()) pathPKFile = filesystem::path(GetDataDir()) / pathPKFile;
	if (filesystem::exists(pathPKFile)) rpc_ssl_context->use_private_key_file(pathPKFile.string(), ssl::context::pem);
	else printf("ThreadRPCServer ERROR: missing server private key file %s\n", pathPKFile.string().c_str());

	string strCiphers = GetArg("-rpcsslciphers", "TLSv1+HIGH:!SSLv2:!aNULL:!eNULL:!AH:!3DES:@STRENGTH");
	SSL_CTX_set_cipher_list(rpc_ssl_context->impl(), strCiphers.c_str());
	}

	// Try a dual IPv6/IPv4 socket, falling back to separate IPv4 and IPv6 sockets
	const bool loopback = !mapArgs.count("-rpcallowip");
	asio::ip::address bindAddress = loopback ? asio::ip::address_v6::loopback() : asio::ip::address_v6::any();
	ip::tcp::endpoint endpoint(bindAddress, GetArg("-rpcport", GetDefaultRPCPort()));
	boost::system::error_code v6_only_error;
	boost::shared_ptr<ip::tcp::acceptor> acceptor(new ip::tcp::acceptor(*rpc_io_service));

	bool fListening = false;
	std::string strerr;
	try
	{
	acceptor->open(endpoint.protocol());
	acceptor->set_option(boost::asio::ip::tcp::acceptor::reuse_address(true));

	// Try making the socket dual IPv6/IPv4 (if listening on the "any" address)
	acceptor->set_option(boost::asio::ip::v6_only(loopback), v6_only_error);

	acceptor->bind(endpoint);
	acceptor->listen(socket_base::max_connections);

	RPCListen(acceptor, *rpc_ssl_context, fUseSSL);

	fListening = true;
	}
	catch(boost::system::system_error &e)
	{
	strerr = strprintf(_("An error occurred while setting up the RPC port %u for listening on IPv6, falling back to IPv4: %s"), endpoint.port(), e.what());
	}

	try {
	// If dual IPv6/IPv4 failed (or we're opening loopback interfaces only), open IPv4 separately
	if (!fListening \|\| loopback \|\| v6_only_error)
	{
	bindAddress = loopback ? asio::ip::address_v4::loopback() : asio::ip::address_v4::any();
	endpoint.address(bindAddress);

	acceptor.reset(new ip::tcp::acceptor(*rpc_io_service));
	acceptor->open(endpoint.protocol());
	acceptor->set_option(boost::asio::ip::tcp::acceptor::reuse_address(true));
	acceptor->bind(endpoint);
	acceptor->listen(socket_base::max_connections);

	RPCListen(acceptor, *rpc_ssl_context, fUseSSL);

	fListening = true;
	}
	}
	catch(boost::system::system_error &e)
	{
	strerr = strprintf(_("An error occurred while setting up the RPC port %u for listening on IPv4: %s"), endpoint.port(), e.what());
	}

	if (!fListening) {
	uiInterface.ThreadSafeMessageBox(strerr, "", CClientUIInterface::MSG_ERROR);
	StartShutdown();
	return;
	}

	rpc_worker_group = new boost::thread_group();
	for (int i = 0; i < GetArg("-rpcthreads", 4); i++)
	rpc_worker_group->create_thread(boost::bind(&asio::io_service::run, rpc_io_service));
	}

	void StopRPCThreads()
	{
	if (rpc_io_service == NULL) return;

	deadlineTimers.clear();
	rpc_io_service->stop();
	rpc_worker_group->join_all();
	delete rpc_worker_group; rpc_worker_group = NULL;
	delete rpc_ssl_context; rpc_ssl_context = NULL;
	delete rpc_io_service; rpc_io_service = NULL;
	}

	void RPCRunHandler(const boost::system::error_code& err, boost::function<void(void)> func)
	{
	if (!err)
	func();
	}

	void RPCRunLater(const std::string& name, boost::function<void(void)> func, int64 nSeconds)
	{
	assert(rpc_io_service != NULL);

	if (deadlineTimers.count(name) == 0)
	{
	deadlineTimers.insert(make_pair(name,
	boost::shared_ptr<deadline_timer>(new deadline_timer(*rpc_io_service))));
	}
	deadlineTimers[name]->expires_from_now(posix_time::seconds(nSeconds));
	deadlineTimers[name]->async_wait(boost::bind(RPCRunHandler, _1, func));
	}


	class JSONRequest
	{
	public:
	Value id;
	string strMethod;
	Array params;

	JSONRequest() { id = Value::null; }
	void parse(const Value& valRequest);
	};

	void JSONRequest::parse(const Value& valRequest)
	{
	// Parse request
	if (valRequest.type() != obj_type)
	throw JSONRPCError(RPC_INVALID_REQUEST, "Invalid Request object");
	const Object& request = valRequest.get_obj();

	// Parse id now so errors from here on will have the id
	id = find_value(request, "id");

	// Parse method
	Value valMethod = find_value(request, "method");
	if (valMethod.type() == null_type)
	throw JSONRPCError(RPC_INVALID_REQUEST, "Missing method");
	if (valMethod.type() != str_type)
	throw JSONRPCError(RPC_INVALID_REQUEST, "Method must be a string");
	strMethod = valMethod.get_str();
	if (strMethod != "getwork" && strMethod != "getblocktemplate")
	printf("ThreadRPCServer method=%s\n", strMethod.c_str());

	// Parse params
	Value valParams = find_value(request, "params");
	if (valParams.type() == array_type)
	params = valParams.get_array();
	else if (valParams.type() == null_type)
	params = Array();
	else
	throw JSONRPCError(RPC_INVALID_REQUEST, "Params must be an array");
	}

	static Object JSONRPCExecOne(const Value& req)
	{
	Object rpc_result;

	JSONRequest jreq;
	try {
	jreq.parse(req);

	Value result = tableRPC.execute(jreq.strMethod, jreq.params);
	rpc_result = JSONRPCReplyObj(result, Value::null, jreq.id);
	}
	catch (Object& objError)
	{
	rpc_result = JSONRPCReplyObj(Value::null, objError, jreq.id);
	}
	catch (std::exception& e)
	{
	rpc_result = JSONRPCReplyObj(Value::null,
	JSONRPCError(RPC_PARSE_ERROR, e.what()), jreq.id);
	}

	return rpc_result;
	}

	static string JSONRPCExecBatch(const Array& vReq)
	{
	Array ret;
	for (unsigned int reqIdx = 0; reqIdx < vReq.size(); reqIdx++)
	ret.push_back(JSONRPCExecOne(vReq[reqIdx]));

	return write_string(Value(ret), false) + "\n";
	}

	void ServiceConnection(AcceptedConnection *conn)
	{
	bool fRun = true;
	while (fRun)
	{
	int nProto = 0;
	map<string, string> mapHeaders;
	string strRequest, strMethod, strURI;

	// Read HTTP request line
	if (!ReadHTTPRequestLine(conn->stream(), nProto, strMethod, strURI))
	break;

	// Read HTTP message headers and body
	ReadHTTPMessage(conn->stream(), mapHeaders, strRequest, nProto);

	if (strURI != "/") {
	conn->stream() << HTTPReply(HTTP_NOT_FOUND, "", false) << std::flush;
	break;
	}

	// Check authorization
	if (mapHeaders.count("authorization") == 0)
	{
	conn->stream() << HTTPReply(HTTP_UNAUTHORIZED, "", false) << std::flush;
	break;
	}
	if (!HTTPAuthorized(mapHeaders))
	{
	printf("ThreadRPCServer incorrect password attempt from %s\n", conn->peer_address_to_string().c_str());
	/* Deter brute-forcing short passwords.
	If this results in a DOS the user really
	shouldn't have their RPC port exposed.*/
	if (mapArgs["-rpcpassword"].size() < 20)
	MilliSleep(250);

	conn->stream() << HTTPReply(HTTP_UNAUTHORIZED, "", false) << std::flush;
	break;
	}
	if (mapHeaders["connection"] == "close")
	fRun = false;

	JSONRequest jreq;
	try
	{
	// Parse request
	Value valRequest;
	if (!read_string(strRequest, valRequest))
	throw JSONRPCError(RPC_PARSE_ERROR, "Parse error");

	string strReply;

	// singleton request
	if (valRequest.type() == obj_type) {
	jreq.parse(valRequest);

	Value result = tableRPC.execute(jreq.strMethod, jreq.params);

	// Send reply
	strReply = JSONRPCReply(result, Value::null, jreq.id);

	// array of requests
	} else if (valRequest.type() == array_type)
	strReply = JSONRPCExecBatch(valRequest.get_array());
	else
	throw JSONRPCError(RPC_PARSE_ERROR, "Top-level object parse error");

	conn->stream() << HTTPReply(HTTP_OK, strReply, fRun) << std::flush;
	}
	catch (Object& objError)
	{
	ErrorReply(conn->stream(), objError, jreq.id);
	break;
	}
	catch (std::exception& e)
	{
	ErrorReply(conn->stream(), JSONRPCError(RPC_PARSE_ERROR, e.what()), jreq.id);
	break;
	}
	}
	}

	json_spirit::Value CRPCTable::execute(const std::string &strMethod, const json_spirit::Array &params) const
	{
	// Find method
	const CRPCCommand *pcmd = tableRPC[strMethod];
	if (!pcmd)
	throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Method not found");

	// Observe safe mode
	string strWarning = GetWarnings("rpc");
	if (strWarning != "" && !GetBoolArg("-disablesafemode") &&
	!pcmd->okSafeMode)
	throw JSONRPCError(RPC_FORBIDDEN_BY_SAFE_MODE, string("Safe mode: ") + strWarning);

	try
	{
	// Execute
	Value result;
	{
	if (pcmd->threadSafe)
	result = pcmd->actor(params, false);
	else {
	LOCK2(cs_main, pwalletMain->cs_wallet);
	result = pcmd->actor(params, false);
	}
	}
	return result;
	}
	catch (std::exception& e)
	{
	throw JSONRPCError(RPC_MISC_ERROR, e.what());
	}
	}


	Object CallRPC(const string& strMethod, const Array& params)
	{
	if (mapArgs["-rpcuser"] == "" && mapArgs["-rpcpassword"] == "")
	throw runtime_error(strprintf(
	_("You must set rpcpassword=<password> in the configuration file:\n%s\n"
	"If the file does not exist, create it with owner-readable-only file permissions."),
	GetConfigFile().string().c_str()));

	// Connect to localhost
	bool fUseSSL = GetBoolArg("-rpcssl");
	asio::io_service io_service;
	ssl::context context(io_service, ssl::context::sslv23);
	context.set_options(ssl::context::no_sslv2);
	asio::ssl::stream<asio::ip::tcp::socket> sslStream(io_service, context);
	SSLIOStreamDevice<asio::ip::tcp> d(sslStream, fUseSSL);
	iostreams::stream< SSLIOStreamDevice<asio::ip::tcp> > stream(d);
	if (!d.connect(GetArg("-rpcconnect", "127.0.0.1"), GetArg("-rpcport", itostr(GetDefaultRPCPort()))))
	throw runtime_error("couldn't connect to server");

	// HTTP basic authentication
	string strUserPass64 = EncodeBase64(mapArgs["-rpcuser"] + ":" + mapArgs["-rpcpassword"]);
	map<string, string> mapRequestHeaders;
	mapRequestHeaders["Authorization"] = string("Basic ") + strUserPass64;

	// Send request
	string strRequest = JSONRPCRequest(strMethod, params, 1);
	string strPost = HTTPPost(strRequest, mapRequestHeaders);
	stream << strPost << std::flush;

	// Receive HTTP reply status
	int nProto = 0;
	int nStatus = ReadHTTPStatus(stream, nProto);

	// Receive HTTP reply message headers and body
	map<string, string> mapHeaders;
	string strReply;
	ReadHTTPMessage(stream, mapHeaders, strReply, nProto);

	if (nStatus == HTTP_UNAUTHORIZED)
	throw runtime_error("incorrect rpcuser or rpcpassword (authorization failed)");
	else if (nStatus >= 400 && nStatus != HTTP_BAD_REQUEST && nStatus != HTTP_NOT_FOUND && nStatus != HTTP_INTERNAL_SERVER_ERROR)
	throw runtime_error(strprintf("server returned HTTP error %d", nStatus));
	else if (strReply.empty())
	throw runtime_error("no response from server");

	// Parse reply
	Value valReply;
	if (!read_string(strReply, valReply))
	throw runtime_error("couldn't parse reply from server");
	const Object& reply = valReply.get_obj();
	if (reply.empty())
	throw runtime_error("expected reply to have result, error and id properties");

	return reply;
	}




	template<typename T>
	void ConvertTo(Value& value, bool fAllowNull=false)
	{
	if (fAllowNull && value.type() == null_type)
	return;
	if (value.type() == str_type)
	{
	// reinterpret string as unquoted json value
	Value value2;
	string strJSON = value.get_str();
	if (!read_string(strJSON, value2))
	throw runtime_error(string("Error parsing JSON:")+strJSON);
	ConvertTo<T>(value2, fAllowNull);
	value = value2;
	}
	else
	{
	value = value.get_value<T>();
	}
	}

	// Convert strings to command-specific RPC representation
	Array RPCConvertValues(const std::string &strMethod, const std::vector<std::string> &strParams)
	{
	Array params;
	BOOST_FOREACH(const std::string &param, strParams)
	params.push_back(param);

	int n = params.size();

	//
	// Special case non-string parameter types
	//
	if (strMethod == "stop" && n > 0) ConvertTo<bool>(params[0]);
	if (strMethod == "getaddednodeinfo" && n > 0) ConvertTo<bool>(params[0]);
	if (strMethod == "setgenerate" && n > 0) ConvertTo<bool>(params[0]);
	if (strMethod == "setgenerate" && n > 1) ConvertTo<boost::int64_t>(params[1]);
	if (strMethod == "sendtoaddress" && n > 1) ConvertTo<double>(params[1]);
	if (strMethod == "settxfee" && n > 0) ConvertTo<double>(params[0]);
	if (strMethod == "getreceivedbyaddress" && n > 1) ConvertTo<boost::int64_t>(params[1]);
	if (strMethod == "getreceivedbyaccount" && n > 1) ConvertTo<boost::int64_t>(params[1]);
	if (strMethod == "listreceivedbyaddress" && n > 0) ConvertTo<boost::int64_t>(params[0]);
	if (strMethod == "listreceivedbyaddress" && n > 1) ConvertTo<bool>(params[1]);
	if (strMethod == "listreceivedbyaccount" && n > 0) ConvertTo<boost::int64_t>(params[0]);
	if (strMethod == "listreceivedbyaccount" && n > 1) ConvertTo<bool>(params[1]);
	if (strMethod == "getbalance" && n > 1) ConvertTo<boost::int64_t>(params[1]);
	if (strMethod == "getblockhash" && n > 0) ConvertTo<boost::int64_t>(params[0]);
	if (strMethod == "move" && n > 2) ConvertTo<double>(params[2]);
	if (strMethod == "move" && n > 3) ConvertTo<boost::int64_t>(params[3]);
	if (strMethod == "sendfrom" && n > 2) ConvertTo<double>(params[2]);
	if (strMethod == "sendfrom" && n > 3) ConvertTo<boost::int64_t>(params[3]);
	if (strMethod == "listtransactions" && n > 1) ConvertTo<boost::int64_t>(params[1]);
	if (strMethod == "listtransactions" && n > 2) ConvertTo<boost::int64_t>(params[2]);
	if (strMethod == "listaccounts" && n > 0) ConvertTo<boost::int64_t>(params[0]);
	if (strMethod == "walletpassphrase" && n > 1) ConvertTo<boost::int64_t>(params[1]);
	if (strMethod == "getblocktemplate" && n > 0) ConvertTo<Object>(params[0]);
	if (strMethod == "listsinceblock" && n > 1) ConvertTo<boost::int64_t>(params[1]);
	if (strMethod == "sendmany" && n > 1) ConvertTo<Object>(params[1]);
	if (strMethod == "sendmany" && n > 2) ConvertTo<boost::int64_t>(params[2]);
	if (strMethod == "addmultisigaddress" && n > 0) ConvertTo<boost::int64_t>(params[0]);
	if (strMethod == "addmultisigaddress" && n > 1) ConvertTo<Array>(params[1]);
	if (strMethod == "createmultisig" && n > 0) ConvertTo<boost::int64_t>(params[0]);
	if (strMethod == "createmultisig" && n > 1) ConvertTo<Array>(params[1]);
	if (strMethod == "listunspent" && n > 0) ConvertTo<boost::int64_t>(params[0]);
	if (strMethod == "listunspent" && n > 1) ConvertTo<boost::int64_t>(params[1]);
	if (strMethod == "listunspent" && n > 2) ConvertTo<Array>(params[2]);
	if (strMethod == "getrawtransaction" && n > 1) ConvertTo<boost::int64_t>(params[1]);
	if (strMethod == "createrawtransaction" && n > 0) ConvertTo<Array>(params[0]);
	if (strMethod == "createrawtransaction" && n > 1) ConvertTo<Object>(params[1]);
	if (strMethod == "signrawtransaction" && n > 1) ConvertTo<Array>(params[1], true);
	if (strMethod == "signrawtransaction" && n > 2) ConvertTo<Array>(params[2], true);
	if (strMethod == "gettxout" && n > 1) ConvertTo<boost::int64_t>(params[1]);
	if (strMethod == "gettxout" && n > 2) ConvertTo<bool>(params[2]);
	if (strMethod == "lockunspent" && n > 0) ConvertTo<bool>(params[0]);
	if (strMethod == "lockunspent" && n > 1) ConvertTo<Array>(params[1]);
	if (strMethod == "importprivkey" && n > 2) ConvertTo<bool>(params[2]);

	return params;
	}

	int CommandLineRPC(int argc, char *argv[])
	{
	string strPrint;
	int nRet = 0;
	try
	{
	// Skip switches
	while (argc > 1 && IsSwitchChar(argv[1][0]))
	{
	argc--;
	argv++;
	}

	// Method
	if (argc < 2)
	throw runtime_error("too few parameters");
	string strMethod = argv[1];

	// Parameters default to strings
	std::vector<std::string> strParams(&argv[2], &argv[argc]);
	Array params = RPCConvertValues(strMethod, strParams);

	// Execute
	Object reply = CallRPC(strMethod, params);

	// Parse reply
	const Value& result = find_value(reply, "result");
	const Value& error = find_value(reply, "error");

	if (error.type() != null_type)
	{
	// Error
	strPrint = "error: " + write_string(error, false);
	int code = find_value(error.get_obj(), "code").get_int();
	nRet = abs(code);
	}
	else
	{
	// Result
	if (result.type() == null_type)
	strPrint = "";
	else if (result.type() == str_type)
	strPrint = result.get_str();
	else
	strPrint = write_string(result, true);
	}
	}
	catch (boost::thread_interrupted) {
	throw;
	}
	catch (std::exception& e) {
	strPrint = string("error: ") + e.what();
	nRet = 87;
	}
	catch (...) {
	PrintException(NULL, "CommandLineRPC()");
	}

	if (strPrint != "")
	{
	fprintf((nRet == 0 ? stdout : stderr), "%s\n", strPrint.c_str());
	}
	return nRet;
	}




	#ifdef TEST
	int main(int argc, char *argv[])
	{
	#ifdef _MSC_VER
	// Turn off Microsoft heap dump noise
	_CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
	_CrtSetReportFile(_CRT_WARN, CreateFile("NUL", GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, 0));
	#endif
	setbuf(stdin, NULL);
	setbuf(stdout, NULL);
	setbuf(stderr, NULL);

	try
	{
	if (argc >= 2 && string(argv[1]) == "-server")
	{
	printf("server ready\n");
	ThreadRPCServer(NULL);
	}
	else
	{
	return CommandLineRPC(argc, argv);
	}
	}
	catch (boost::thread_interrupted) {
	throw;
	}
	catch (std::exception& e) {
	PrintException(&e, "main()");
	} catch (...) {
	PrintException(NULL, "main()");
	}
	return 0;
	}
	#endif

	const CRPCTable tableRPC;

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