节点控制
# T& O) X9 |. h! o; ~1 _在某种程度上用户必须能够控制节点。这一点通过搭建一个HTTP服务器可以实现。4 H) F+ R& j8 p; h

1. var initHttpServer = () => {
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2.     var app = express();# c, ]+ X9 e/ B% d
   
3.     app.use(bodyParser.json());
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4.     app.get('/blocks', (req, res) => res.send(JSON.stringify(blockchain)));
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5.     app.post('/mineBlock', (req, res) => {/ A9 H  Q. H6 X( Q- z
   
6.         var newBlock = generateNextBlock(req.body.data);
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7.         addBlock(newBlock);
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8.         broadcast(responseLatestMsg());& V# S. x4 I- {8 C/ z( n, N4 B
   
9.         console.log('block added: ' + JSON.stringify(newBlock));3 w) g' U0 S; @: `
   
10.         res.send();: |9 h. C1 [3 k7 x) _/ ~7 ~2 E* \+ y" I: G
    
11.     });
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12.     app.get('/peers', (req, res) => {/ N1 {  c: p" X" N+ r# W
    
13.         res.send(sockets.map(s => s._socket.remoteAddress + ':' + s._socket.remotePort));
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14.     });
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15.     app.post('/addPeer', (req, res) => {
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16.         connectToPeers([req.body.peer]);- d5 g% z/ F3 W2 m4 d' w" b/ V9 @
    
17.         res.send();  s! M, E6 E5 q& G
    
18.     });
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19.     app.listen(http_port, () => console.log('Listening http on port: ' + http_port));, s5 H, _0 y. U0 n$ u( r7 P' }
    
20. };

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