mirror of https://github.com/embarklabs/embark.git
133 lines
3.5 KiB
JavaScript
133 lines
3.5 KiB
JavaScript
const httpProxy = require('http-proxy');
|
|
const http = require('http');
|
|
const constants = require('../../constants.json');
|
|
|
|
let commList = {};
|
|
let transactions = {};
|
|
let receipts = {};
|
|
|
|
const {canonicalHost, defaultHost} = require('../../utils/host');
|
|
|
|
const parseRequest = function (reqBody) {
|
|
let jsonO;
|
|
try {
|
|
jsonO = JSON.parse(reqBody);
|
|
} catch (e) {
|
|
return; // Request is not a json. Do nothing
|
|
}
|
|
if (jsonO.method === "eth_sendTransaction") {
|
|
commList[jsonO.id] = {
|
|
type: 'contract-log',
|
|
address: jsonO.params[0].to,
|
|
data: jsonO.params[0].data
|
|
};
|
|
} else if (jsonO.method === "eth_getTransactionReceipt") {
|
|
if (transactions[jsonO.params[0]]) {
|
|
transactions[jsonO.params[0]].receiptId = jsonO.id;
|
|
receipts[jsonO.id] = transactions[jsonO.params[0]].commListId;
|
|
}
|
|
}
|
|
};
|
|
|
|
const parseResponse = function (ipc, resBody) {
|
|
let jsonO;
|
|
try {
|
|
jsonO = JSON.parse(resBody);
|
|
} catch (e) {
|
|
return; // Response is not a json. Do nothing
|
|
}
|
|
if (commList[jsonO.id]) {
|
|
commList[jsonO.id].transactionHash = jsonO.result;
|
|
transactions[jsonO.result] = {commListId: jsonO.id};
|
|
} else if (receipts[jsonO.id] && jsonO.result && jsonO.result.blockNumber) {
|
|
// TODO find out why commList[receipts[jsonO.id]] is sometimes not defined
|
|
if (!commList[receipts[jsonO.id]]) {
|
|
commList[receipts[jsonO.id]] = {};
|
|
}
|
|
commList[receipts[jsonO.id]].blockNumber = jsonO.result.blockNumber;
|
|
commList[receipts[jsonO.id]].gasUsed = jsonO.result.gasUsed;
|
|
commList[receipts[jsonO.id]].status = jsonO.result.status;
|
|
|
|
if (ipc.connected && !ipc.connecting) {
|
|
ipc.request('log', commList[receipts[jsonO.id]]);
|
|
} else {
|
|
ipc.connecting = true;
|
|
ipc.connect(() => {
|
|
ipc.connecting = false;
|
|
});
|
|
}
|
|
|
|
delete transactions[commList[receipts[jsonO.id]].transactionHash];
|
|
delete commList[receipts[jsonO.id]];
|
|
delete receipts[jsonO.id];
|
|
}
|
|
};
|
|
|
|
exports.serve = function (ipc, host, port, ws) {
|
|
let proxy = httpProxy.createProxyServer({
|
|
target: {
|
|
host: canonicalHost(host),
|
|
port: port + constants.blockchain.servicePortOnProxy
|
|
},
|
|
ws: ws
|
|
});
|
|
|
|
proxy.on('error', function (e) {
|
|
console.error(__("Error forwarding requests to blockchain/simulator"), e.message);
|
|
});
|
|
|
|
proxy.on('proxyRes', (proxyRes) => {
|
|
let resBody = [];
|
|
proxyRes.on('data', (b) => resBody.push(b));
|
|
proxyRes.on('end', function () {
|
|
resBody = Buffer.concat(resBody).toString();
|
|
if (resBody) {
|
|
parseResponse(ipc, resBody);
|
|
}
|
|
});
|
|
});
|
|
|
|
let server = http.createServer((req, res) => {
|
|
let reqBody = [];
|
|
req.on('data', (b) => {
|
|
reqBody.push(b);
|
|
})
|
|
.on('end', () => {
|
|
reqBody = Buffer.concat(reqBody).toString();
|
|
if (reqBody) {
|
|
parseRequest(reqBody);
|
|
}
|
|
});
|
|
|
|
if (!ws) {
|
|
proxy.web(req, res);
|
|
}
|
|
});
|
|
|
|
if (ws) {
|
|
const WsParser = require('simples/lib/parsers/ws'); // npm install simples
|
|
|
|
server.on('upgrade', function (req, socket, head) {
|
|
proxy.ws(req, socket, head);
|
|
});
|
|
|
|
proxy.on('open', (proxySocket) => {
|
|
proxySocket.on('data', (data) => {
|
|
parseResponse(ipc, data.toString().substr(data.indexOf("{")));
|
|
});
|
|
});
|
|
|
|
proxy.on('proxyReqWs', (proxyReq, req, socket) => {
|
|
var parser = new WsParser(0, false);
|
|
socket.pipe(parser);
|
|
parser.on('frame', function (frame) {
|
|
parseRequest(frame.data);
|
|
});
|
|
|
|
});
|
|
}
|
|
|
|
server.listen(port, defaultHost);
|
|
return server;
|
|
};
|