Add /rest/headers

qa/rpc-tests/rest.py

@@ -23,41 +23,64 @@ except ImportError:
 def http_get_call(host, port, path, response_object = 0):
     conn = httplib.HTTPConnection(host, port)
     conn.request('GET', path)
-    
+
     if response_object:
         return conn.getresponse()
-        
+
     return conn.getresponse().read()
 
 
 class RESTTest (BitcoinTestFramework):
     FORMAT_SEPARATOR = "."
-    
+
     def run_test(self):
         url = urlparse.urlparse(self.nodes[0].url)
         bb_hash = self.nodes[0].getbestblockhash()
-        
+
         # check binary format
         response = http_get_call(url.hostname, url.port, '/rest/block/'+bb_hash+self.FORMAT_SEPARATOR+"bin", True)
         assert_equal(response.status, 200)
-        assert_greater_than(int(response.getheader('content-length')), 10)
-        
+        assert_greater_than(int(response.getheader('content-length')), 80)
+        response_str = response.read()
+
+        # compare with block header
+        response_header = http_get_call(url.hostname, url.port, '/rest/headers/1/'+bb_hash+self.FORMAT_SEPARATOR+"bin", True)
+        assert_equal(response_header.status, 200)
+        assert_equal(int(response_header.getheader('content-length')), 80)
+        response_header_str = response_header.read()
+        assert_equal(response_str[0:80], response_header_str)
+
+        # check block hex format
+        response_hex = http_get_call(url.hostname, url.port, '/rest/block/'+bb_hash+self.FORMAT_SEPARATOR+"hex", True)
+        assert_equal(response_hex.status, 200)
+        assert_greater_than(int(response_hex.getheader('content-length')), 160)
+        response_hex_str = response_hex.read()
+        assert_equal(response_str.encode("hex")[0:160], response_hex_str[0:160])
+
+        # compare with hex block header
+        response_header_hex = http_get_call(url.hostname, url.port, '/rest/headers/1/'+bb_hash+self.FORMAT_SEPARATOR+"hex", True)
+        assert_equal(response_header_hex.status, 200)
+        assert_greater_than(int(response_header_hex.getheader('content-length')), 160)
+        response_header_hex_str = response_header_hex.read()
+        assert_equal(response_hex_str[0:160], response_header_hex_str[0:160])
+        assert_equal(response_header_str.encode("hex")[0:160], response_header_hex_str[0:160])
+
         # check json format
         json_string = http_get_call(url.hostname, url.port, '/rest/block/'+bb_hash+self.FORMAT_SEPARATOR+'json')
         json_obj = json.loads(json_string)
         assert_equal(json_obj['hash'], bb_hash)
-        
+
         # do tx test
         tx_hash = json_obj['tx'][0]['txid'];
         json_string = http_get_call(url.hostname, url.port, '/rest/tx/'+tx_hash+self.FORMAT_SEPARATOR+"json")
         json_obj = json.loads(json_string)
         assert_equal(json_obj['txid'], tx_hash)
-        
+
         # check hex format response
         hex_string = http_get_call(url.hostname, url.port, '/rest/tx/'+tx_hash+self.FORMAT_SEPARATOR+"hex", True)
         assert_equal(response.status, 200)
         assert_greater_than(int(response.getheader('content-length')), 10)
-        
+
         # check block tx details
         # let's make 3 tx and mine them on node 1
         txs = []
@@ -65,25 +88,23 @@ class RESTTest (BitcoinTestFramework):
         txs.append(self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 11))
         txs.append(self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 11))
         self.sync_all()
-        
+
         # now mine the transactions
         newblockhash = self.nodes[1].setgenerate(True, 1)
         self.sync_all()
-        
+
         #check if the 3 tx show up in the new block
         json_string = http_get_call(url.hostname, url.port, '/rest/block/'+newblockhash[0]+self.FORMAT_SEPARATOR+'json')
         json_obj = json.loads(json_string)
         for tx in json_obj['tx']:
             if not 'coinbase' in tx['vin'][0]: #exclude coinbase
                 assert_equal(tx['txid'] in txs, True)
-        
+
         #check the same but without tx details
         json_string = http_get_call(url.hostname, url.port, '/rest/block/notxdetails/'+newblockhash[0]+self.FORMAT_SEPARATOR+'json')
         json_obj = json.loads(json_string)
         for tx in txs:
             assert_equal(tx in json_obj['tx'], True)
-                
-        
 
 if __name__ == '__main__':
     RESTTest ().main ()

src/rest.cpp

@@ -89,6 +89,69 @@ static bool ParseHashStr(const string& strReq, uint256& v)
     return true;
 }
 
+static bool rest_headers(AcceptedConnection* conn,
+                         string& strReq,
+                         map<string, 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,
                        string& strReq,
                        map<string, string>& mapHeaders,
@@ -224,6 +287,7 @@ static const struct {
       {"/rest/tx/", rest_tx},
       {"/rest/block/notxdetails/", rest_block_notxdetails},
       {"/rest/block/", rest_block_extended},
+      {"/rest/headers/", rest_headers},
 };
 
 bool HTTPReq_REST(AcceptedConnection* conn,