Split up bitcoinrpc (code movement only)

Split bitcoinrpc up into

- rpcserver: bitcoind RPC server
- rpcclient: bitcoin-cli RPC client
- rpcprotocol: shared common HTTP/JSON-RPC protocol code

One step towards making bitcoin-cli independent from the rest
of the code, and thus a smaller executable that doesn't have to
be linked against leveldb.

This commit only does code movement, there are no functional changes.

1 files changed, 138 insertions, 0 deletions

diff --git a/src/rpcprotocol.h b/src/rpcprotocol.h
new file mode 100644
index 0000000000..6bf371e759
--- /dev/null
+++ b/src/rpcprotocol.h
@@ -0,0 +1,138 @@
+// Copyright (c) 2010 Satoshi Nakamoto
+// Copyright (c) 2009-2013 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef _BITCOINRPC_PROTOCOL_H_
+#define _BITCOINRPC_PROTOCOL_H_ 1
+
+#include <list>
+#include <map>
+#include <stdint.h>
+#include <string>
+#include <boost/iostreams/concepts.hpp>
+#include <boost/iostreams/stream.hpp>
+#include <boost/asio.hpp>
+#include <boost/asio/ssl.hpp>
+
+#include "json/json_spirit_reader_template.h"
+#include "json/json_spirit_utils.h"
+#include "json/json_spirit_writer_template.h"
+
+// HTTP status codes
+enum HTTPStatusCode
+{
+    HTTP_OK                    = 200,
+    HTTP_BAD_REQUEST           = 400,
+    HTTP_UNAUTHORIZED          = 401,
+    HTTP_FORBIDDEN             = 403,
+    HTTP_NOT_FOUND             = 404,
+    HTTP_INTERNAL_SERVER_ERROR = 500,
+};
+
+// Bitcoin RPC error codes
+enum RPCErrorCode
+{
+    // Standard JSON-RPC 2.0 errors
+    RPC_INVALID_REQUEST  = -32600,
+    RPC_METHOD_NOT_FOUND = -32601,
+    RPC_INVALID_PARAMS   = -32602,
+    RPC_INTERNAL_ERROR   = -32603,
+    RPC_PARSE_ERROR      = -32700,
+
+    // General application defined errors
+    RPC_MISC_ERROR                  = -1,  // std::exception thrown in command handling
+    RPC_FORBIDDEN_BY_SAFE_MODE      = -2,  // Server is in safe mode, and command is not allowed in safe mode
+    RPC_TYPE_ERROR                  = -3,  // Unexpected type was passed as parameter
+    RPC_INVALID_ADDRESS_OR_KEY      = -5,  // Invalid address or key
+    RPC_OUT_OF_MEMORY               = -7,  // Ran out of memory during operation
+    RPC_INVALID_PARAMETER           = -8,  // Invalid, missing or duplicate parameter
+    RPC_DATABASE_ERROR              = -20, // Database error
+    RPC_DESERIALIZATION_ERROR       = -22, // Error parsing or validating structure in raw format
+    RPC_SERVER_NOT_STARTED          = -18, // RPC server was not started (StartRPCThreads() not called)
+
+    // P2P client errors
+    RPC_CLIENT_NOT_CONNECTED        = -9,  // Bitcoin is not connected
+    RPC_CLIENT_IN_INITIAL_DOWNLOAD  = -10, // Still downloading initial blocks
+    RPC_CLIENT_NODE_ALREADY_ADDED   = -23, // Node is already added
+    RPC_CLIENT_NODE_NOT_ADDED       = -24, // Node has not been added before
+
+    // Wallet errors
+    RPC_WALLET_ERROR                = -4,  // Unspecified problem with wallet (key not found etc.)
+    RPC_WALLET_INSUFFICIENT_FUNDS   = -6,  // Not enough funds in wallet or account
+    RPC_WALLET_INVALID_ACCOUNT_NAME = -11, // Invalid account name
+    RPC_WALLET_KEYPOOL_RAN_OUT      = -12, // Keypool ran out, call keypoolrefill first
+    RPC_WALLET_UNLOCK_NEEDED        = -13, // Enter the wallet passphrase with walletpassphrase first
+    RPC_WALLET_PASSPHRASE_INCORRECT = -14, // The wallet passphrase entered was incorrect
+    RPC_WALLET_WRONG_ENC_STATE      = -15, // Command given in wrong wallet encryption state (encrypting an encrypted wallet etc.)
+    RPC_WALLET_ENCRYPTION_FAILED    = -16, // Failed to encrypt the wallet
+    RPC_WALLET_ALREADY_UNLOCKED     = -17, // Wallet is already unlocked
+};
+
+//
+// IOStream device that speaks SSL but can also speak non-SSL
+//
+template <typename Protocol>
+class SSLIOStreamDevice : public boost::iostreams::device<boost::iostreams::bidirectional> {
+public:
+    SSLIOStreamDevice(boost::asio::ssl::stream<typename Protocol::socket> &streamIn, bool fUseSSLIn) : stream(streamIn)
+    {
+        fUseSSL = fUseSSLIn;
+        fNeedHandshake = fUseSSLIn;
+    }
+
+    void handshake(boost::asio::ssl::stream_base::handshake_type role)
+    {
+        if (!fNeedHandshake) return;
+        fNeedHandshake = false;
+        stream.handshake(role);
+    }
+    std::streamsize read(char* s, std::streamsize n)
+    {
+        handshake(boost::asio::ssl::stream_base::server); // HTTPS servers read first
+        if (fUseSSL) return stream.read_some(boost::asio::buffer(s, n));
+        return stream.next_layer().read_some(boost::asio::buffer(s, n));
+    }
+    std::streamsize write(const char* s, std::streamsize n)
+    {
+        handshake(boost::asio::ssl::stream_base::client); // HTTPS clients write first
+        if (fUseSSL) return boost::asio::write(stream, boost::asio::buffer(s, n));
+        return boost::asio::write(stream.next_layer(), boost::asio::buffer(s, n));
+    }
+    bool connect(const std::string& server, const std::string& port)
+    {
+        boost::asio::ip::tcp::resolver resolver(stream.get_io_service());
+        boost::asio::ip::tcp::resolver::query query(server.c_str(), port.c_str());
+        boost::asio::ip::tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);
+        boost::asio::ip::tcp::resolver::iterator end;
+        boost::system::error_code error = boost::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;
+    boost::asio::ssl::stream<typename Protocol::socket>& stream;
+};
+
+std::string HTTPPost(const std::string& strMsg, const std::map<std::string,std::string>& mapRequestHeaders);
+std::string HTTPReply(int nStatus, const std::string& strMsg, bool keepalive);
+bool ReadHTTPRequestLine(std::basic_istream<char>& stream, int &proto,
+                         std::string& http_method, std::string& http_uri);
+int ReadHTTPStatus(std::basic_istream<char>& stream, int &proto);
+int ReadHTTPHeaders(std::basic_istream<char>& stream, std::map<std::string, std::string>& mapHeadersRet);
+int ReadHTTPMessage(std::basic_istream<char>& stream, std::map<std::string, std::string>& mapHeadersRet,
+                    std::string& strMessageRet, int nProto);
+std::string JSONRPCRequest(const std::string& strMethod, const json_spirit::Array& params, const json_spirit::Value& id);
+json_spirit::Object JSONRPCReplyObj(const json_spirit::Value& result, const json_spirit::Value& error, const json_spirit::Value& id);
+std::string JSONRPCReply(const json_spirit::Value& result, const json_spirit::Value& error, const json_spirit::Value& id);
+json_spirit::Object JSONRPCError(int code, const std::string& message);
+
+#endif