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// Copyright (c) 2009-2010 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 <boost/algorithm/string.hpp>
#include "rpcserver.h"
#include "streams.h"
#include "utilstrencodings.h"
#include "core/block.h"
#include "core/transaction.h"
#include "version.h"
#include "main.h"
using namespace std;
using namespace json_spirit;
enum RetFormat {
RF_BINARY,
RF_HEX,
RF_JSON,
};
static const struct {
enum RetFormat rf;
const char *name;
} rf_names[] = {
{ RF_BINARY, "binary" }, // default, if match not found
{ 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(const string& format)
{
for (unsigned int i = 0; i < ARRAYLEN(rf_names); i++)
if (format == rf_names[i].name)
return rf_names[i].rf;
return rf_names[0].rf;
}
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;
boost::split(params, strReq, boost::is_any_of("/"));
enum RetFormat rf = ParseDataFormat(params.size() > 1 ? params[1] : string(""));
string hashStr = params[0];
uint256 hash;
if (!ParseHashStr(hashStr, hash))
throw RESTERR(HTTP_BAD_REQUEST, "Invalid hash: " + hashStr);
if (mapBlockIndex.count(hash) == 0)
throw RESTERR(HTTP_NOT_FOUND, hashStr + " not found");
CBlock block;
CBlockIndex* 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() << HTTPReply(HTTP_OK, binaryBlock, fRun, true, "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;
}
}
// 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;
boost::split(params, strReq, boost::is_any_of("/"));
enum RetFormat rf = ParseDataFormat(params.size() > 1 ? params[1] : string(""));
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() << HTTPReply(HTTP_OK, binaryTx, fRun, true, "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;
}
}
// 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 {
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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