diff options
Diffstat (limited to 'src/rest.cpp')
| -rw-r--r-- | src/rest.cpp | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/src/rest.cpp b/src/rest.cpp new file mode 100644 index 0000000000..6285784af5 --- /dev/null +++ b/src/rest.cpp @@ -0,0 +1,235 @@ +// 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; +} |