1 files changed, 317 insertions, 0 deletions
diff --git a/src/rest.cpp b/src/rest.cpp
new file mode 100644
index 000000000..4702f0d70
--- /dev/null
+++ b/src/rest.cpp
@@ -0,0 +1,317 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2014 The Bitcoin Core 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, bool txDetails = false);
+
+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_headers(AcceptedConnection* conn,
+                         const std::string& strReq,
+                         const std::map<std::string, std::string>& mapHeaders,
+                         bool fRun)
+{
+    vector<string> params;
+    enum RetFormat rf = ParseDataFormat(params, strReq);
+    vector<string> path;
+    boost::split(path, params[0], boost::is_any_of("/"));
+
+    if (path.size() != 2)
+        throw RESTERR(HTTP_BAD_REQUEST, "No header count specified. Use /rest/headers/<count>/<hash>.<ext>.");
+
+    long count = strtol(path[0].c_str(), NULL, 10);
+    if (count < 1 || count > 2000)
+        throw RESTERR(HTTP_BAD_REQUEST, "Header count out of range: " + path[0]);
+
+    string hashStr = path[1];
+    uint256 hash;
+    if (!ParseHashStr(hashStr, hash))
+        throw RESTERR(HTTP_BAD_REQUEST, "Invalid hash: " + hashStr);
+
+    std::vector<CBlockHeader> headers;
+    headers.reserve(count);
+    {
+        LOCK(cs_main);
+        BlockMap::const_iterator it = mapBlockIndex.find(hash);
+        const CBlockIndex *pindex = (it != mapBlockIndex.end()) ? it->second : NULL;
+        while (pindex != NULL && chainActive.Contains(pindex)) {
+            headers.push_back(pindex->GetBlockHeader());
+            if (headers.size() == (unsigned long)count)
+                break;
+            pindex = chainActive.Next(pindex);
+        }
+    }
+
+    CDataStream ssHeader(SER_NETWORK, PROTOCOL_VERSION);
+    BOOST_FOREACH(const CBlockHeader &header, headers) {
+        ssHeader << header;
+    }
+
+    switch (rf) {
+    case RF_BINARY: {
+        string binaryHeader = ssHeader.str();
+        conn->stream() << HTTPReplyHeader(HTTP_OK, fRun, binaryHeader.size(), "application/octet-stream") << binaryHeader << std::flush;
+        return true;
+    }
+
+    case RF_HEX: {
+        string strHex = HexStr(ssHeader.begin(), ssHeader.end()) + "\n";
+        conn->stream() << HTTPReply(HTTP_OK, strHex, fRun, false, "text/plain") << std::flush;
+        return true;
+    }
+
+    default: {
+        throw RESTERR(HTTP_NOT_FOUND, "output format not found (available: .bin, .hex)");
+    }
+    }
+
+    // not reached
+    return true; // continue to process further HTTP reqs on this cxn
+}
+
+static bool rest_block(AcceptedConnection* conn,
+                       const std::string& strReq,
+                       const std::map<std::string, std::string>& mapHeaders,
+                       bool fRun,
+                       bool showTxDetails)
+{
+    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, showTxDetails);
+        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_block_extended(AcceptedConnection* conn,
+                       const std::string& strReq,
+                       const std::map<std::string, std::string>& mapHeaders,
+                       bool fRun)
+{
+    return rest_block(conn, strReq, mapHeaders, fRun, true);
+}
+
+static bool rest_block_notxdetails(AcceptedConnection* conn,
+                       const std::string& strReq,
+                       const std::map<std::string, std::string>& mapHeaders,
+                       bool fRun)
+{
+    return rest_block(conn, strReq, mapHeaders, fRun, false);
+}
+
+static bool rest_tx(AcceptedConnection* conn,
+                    const std::string& strReq,
+                    const std::map<std::string, std::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,
+                    const std::string& strURI,
+                    const std::map<std::string, std::string>& mapHeaders,
+                    bool fRun);
+} uri_prefixes[] = {
+      {"/rest/tx/", rest_tx},
+      {"/rest/block/notxdetails/", rest_block_notxdetails},
+      {"/rest/block/", rest_block_extended},
+      {"/rest/headers/", rest_headers},
+};
+
+bool HTTPReq_REST(AcceptedConnection* conn,
+                  const std::string& strURI,
+                  const std::map<std::string, std::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 (const 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;
+}