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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "primitives/block.h"
#include "primitives/transaction.h"
#include "main.h"
#include "rpcserver.h"
#include "streams.h"
#include "sync.h"
#include "utilstrencodings.h"
#include "version.h"
#include <boost/algorithm/string.hpp>
using namespace std;
using namespace json_spirit;
enum RetFormat {
RF_UNDEF,
RF_BINARY,
RF_HEX,
RF_JSON,
};
static const struct {
enum RetFormat rf;
const char* name;
} rf_names[] = {
{RF_UNDEF, ""},
{RF_BINARY, "bin"},
{RF_HEX, "hex"},
{RF_JSON, "json"},
};
class RestErr
{
public:
enum HTTPStatusCode status;
string message;
};
extern void TxToJSON(const CTransaction& tx, const uint256 hashBlock, Object& entry);
extern Object blockToJSON(const CBlock& block, const CBlockIndex* blockindex);
static RestErr RESTERR(enum HTTPStatusCode status, string message)
{
RestErr re;
re.status = status;
re.message = message;
return re;
}
static enum RetFormat ParseDataFormat(vector<string>& params, const string strReq)
{
boost::split(params, strReq, boost::is_any_of("."));
if (params.size() > 1) {
for (unsigned int i = 0; i < ARRAYLEN(rf_names); i++)
if (params[1] == rf_names[i].name)
return rf_names[i].rf;
}
return rf_names[0].rf;
}
static string AvailableDataFormatsString()
{
string formats = "";
for (unsigned int i = 0; i < ARRAYLEN(rf_names); i++)
if (strlen(rf_names[i].name) > 0) {
formats.append(".");
formats.append(rf_names[i].name);
formats.append(", ");
}
if (formats.length() > 0)
return formats.substr(0, formats.length() - 2);
return formats;
}
static bool ParseHashStr(const string& strReq, uint256& v)
{
if (!IsHex(strReq) || (strReq.size() != 64))
return false;
v.SetHex(strReq);
return true;
}
static bool rest_block(AcceptedConnection* conn,
string& strReq,
map<string, string>& mapHeaders,
bool fRun)
{
vector<string> params;
enum RetFormat rf = ParseDataFormat(params, strReq);
string hashStr = params[0];
uint256 hash;
if (!ParseHashStr(hashStr, hash))
throw RESTERR(HTTP_BAD_REQUEST, "Invalid hash: " + hashStr);
CBlock block;
CBlockIndex* pblockindex = NULL;
{
LOCK(cs_main);
if (mapBlockIndex.count(hash) == 0)
throw RESTERR(HTTP_NOT_FOUND, hashStr + " not found");
pblockindex = mapBlockIndex[hash];
if (!ReadBlockFromDisk(block, pblockindex))
throw RESTERR(HTTP_NOT_FOUND, hashStr + " not found");
}
CDataStream ssBlock(SER_NETWORK, PROTOCOL_VERSION);
ssBlock << block;
switch (rf) {
case RF_BINARY: {
string binaryBlock = ssBlock.str();
conn->stream() << HTTPReplyHeader(HTTP_OK, fRun, binaryBlock.size(), "application/octet-stream") << binaryBlock << std::flush;
return true;
}
case RF_HEX: {
string strHex = HexStr(ssBlock.begin(), ssBlock.end()) + "\n";
conn->stream() << HTTPReply(HTTP_OK, strHex, fRun, false, "text/plain") << std::flush;
return true;
}
case RF_JSON: {
Object objBlock = blockToJSON(block, pblockindex);
string strJSON = write_string(Value(objBlock), false) + "\n";
conn->stream() << HTTPReply(HTTP_OK, strJSON, fRun) << std::flush;
return true;
}
default: {
throw RESTERR(HTTP_NOT_FOUND, "output format not found (available: " + AvailableDataFormatsString() + ")");
}
}
// not reached
return true; // continue to process further HTTP reqs on this cxn
}
static bool rest_tx(AcceptedConnection* conn,
string& strReq,
map<string, string>& mapHeaders,
bool fRun)
{
vector<string> params;
enum RetFormat rf = ParseDataFormat(params, strReq);
string hashStr = params[0];
uint256 hash;
if (!ParseHashStr(hashStr, hash))
throw RESTERR(HTTP_BAD_REQUEST, "Invalid hash: " + hashStr);
CTransaction tx;
uint256 hashBlock = 0;
if (!GetTransaction(hash, tx, hashBlock, true))
throw RESTERR(HTTP_NOT_FOUND, hashStr + " not found");
CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
ssTx << tx;
switch (rf) {
case RF_BINARY: {
string binaryTx = ssTx.str();
conn->stream() << HTTPReplyHeader(HTTP_OK, fRun, binaryTx.size(), "application/octet-stream") << binaryTx << std::flush;
return true;
}
case RF_HEX: {
string strHex = HexStr(ssTx.begin(), ssTx.end()) + "\n";
conn->stream() << HTTPReply(HTTP_OK, strHex, fRun, false, "text/plain") << std::flush;
return true;
}
case RF_JSON: {
Object objTx;
TxToJSON(tx, hashBlock, objTx);
string strJSON = write_string(Value(objTx), false) + "\n";
conn->stream() << HTTPReply(HTTP_OK, strJSON, fRun) << std::flush;
return true;
}
default: {
throw RESTERR(HTTP_NOT_FOUND, "output format not found (available: " + AvailableDataFormatsString() + ")");
}
}
// not reached
return true; // continue to process further HTTP reqs on this cxn
}
static const struct {
const char* prefix;
bool (*handler)(AcceptedConnection* conn,
string& strURI,
map<string, string>& mapHeaders,
bool fRun);
} uri_prefixes[] = {
{"/rest/tx/", rest_tx},
{"/rest/block/", rest_block},
};
bool HTTPReq_REST(AcceptedConnection* conn,
string& strURI,
map<string, string>& mapHeaders,
bool fRun)
{
try {
std::string statusmessage;
if (RPCIsInWarmup(&statusmessage))
throw RESTERR(HTTP_SERVICE_UNAVAILABLE, "Service temporarily unavailable: " + statusmessage);
for (unsigned int i = 0; i < ARRAYLEN(uri_prefixes); i++) {
unsigned int plen = strlen(uri_prefixes[i].prefix);
if (strURI.substr(0, plen) == uri_prefixes[i].prefix) {
string strReq = strURI.substr(plen);
return uri_prefixes[i].handler(conn, strReq, mapHeaders, fRun);
}
}
} catch (RestErr& re) {
conn->stream() << HTTPReply(re.status, re.message + "\r\n", false, false, "text/plain") << std::flush;
return false;
}
conn->stream() << HTTPError(HTTP_NOT_FOUND, false) << std::flush;
return false;
}
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