mirror of https://github.com/embarklabs/embark.git
refactor(@embark/blockchain_process): improve the blockchain proxy
Use proper stream parsing to consistently track JSON-RPC messages. For HTTP POST requests use the `stream-json` package to assemble request and response message objects. For WebSocket requests continue to use `simples/lib/parsers/ws` to process stream frames into messages. For Websocket responses use the Receiver class of the `ws` package to process stream data into messages. In both cases, make use of the `cloneable-readable` and `stream-chain` packages to avoid leaks. This mishmash of stream parsing approaches is the result of much experimentation to find a working solution. For example, `simples/lib/parsers/ws` does't work for processing WebSocket responses and `ws.Receiver` doesn't work for processing requests. Additional revisions may be necessary. Revise `blockchain_process/dev_funds.js` to use web3's HTTP provider if a DApp disables the WebSocket proxy.
This commit is contained in:
Michael Bradley, Jr
Michael Bradley
parent
160015311e
commit
801932b726
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@ -84,6 +84,7 @@
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"chokidar": "2.0.4",
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"clipboardy": "1.2.3",
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"clone-deep": "4.0.0",
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"cloneable-readable": "2.0.0",
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"colors": "1.3.2",
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"commander": "2.18.0",
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"compression-webpack-plugin": "2.0.0",
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@ -114,7 +115,7 @@
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"hard-source-webpack-plugin": "0.12.0",
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"helmet": "3.13.0",
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"hosted-git-info": "2.7.1",
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"http-proxy": "1.17.0",
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"http-proxy-middleware": "0.19.0",
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"http-shutdown": "1.2.0",
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"i18n": "0.8.3",
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"ipfs-api": "17.2.4",
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@ -139,6 +140,7 @@
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"pkg-up": "2.0.0",
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"promptly": "2.2.0",
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"propose": "0.0.5",
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"pump": "3.0.0",
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"react-scripts": "1.1.5",
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"remix-debug-debugtest": "0.2.14",
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"remix-tests": "0.0.21",
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@ -150,6 +152,7 @@
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"simples": "0.8.8",
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"solc": "0.5.0",
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"source-map-support": "0.5.9",
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"stream-json": "1.1.3",
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"string-replace-async": "1.2.1",
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"style-loader": "0.23.1",
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"subdir": "0.0.3",
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@ -164,7 +167,8 @@
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"webpack": "4.19.0",
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"webpack-bundle-analyzer": "2.13.1",
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"websocket": "1.0.28",
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"window-size": "1.1.1"
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"window-size": "1.1.1",
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"ws": "6.1.2"
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},
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"devDependencies": {
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"@babel/cli": "7.1.2",
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@ -12,7 +12,25 @@ class DevFunds {
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this.password = this.blockchainConfig.account.password ? readFileSync(dappPath(this.blockchainConfig.account.password), 'utf8').replace('\n', '') : 'dev_password';
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this.networkId = null;
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this.balance = Web3.utils.toWei("1", "ether");
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this.provider = options.provider || new Web3.providers.WebsocketProvider(buildUrl('ws', this.blockchainConfig.wsHost, this.blockchainConfig.wsPort), {headers: {Origin: constants.embarkResourceOrigin}});
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if (options.provider) {
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this.provider = options.provider;
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} else if (this.blockchainConfig.wsRPC) {
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this.provider = new Web3.providers.WebsocketProvider(
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buildUrl(
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'ws',
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this.blockchainConfig.wsHost,
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this.blockchainConfig.wsPort
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),
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{headers: {Origin: constants.embarkResourceOrigin}});
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} else {
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this.provider = new Web3.providers.HttpProvider(
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buildUrl(
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'http',
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this.blockchainConfig.rpcHost,
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this.blockchainConfig.rpcPort
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)
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);
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}
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this.web3 = new Web3(this.provider);
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if (this.blockchainConfig.account.balance) {
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this.balance = this.blockchainConfig.account.balance;
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@ -1,156 +1,180 @@
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const httpProxy = require('http-proxy');
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const http = require('http');
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const constants = require('../../constants.json');
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const utils = require('../../utils/utils');
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let commList = {};
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let transactions = {};
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let receipts = {};
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/* global __ exports require */
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const Asm = require('stream-json/Assembler');
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const {canonicalHost, defaultHost} = require('../../utils/host');
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const {chain} = require('stream-chain');
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const cloneable = require('cloneable-readable');
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const constants = require('../../constants.json');
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const express = require('express');
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const {parser} = require('stream-json');
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const proxyMiddleware = require('http-proxy-middleware');
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const pump = require('pump');
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const utils = require('../../utils/utils');
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const WebSocket = require('ws');
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const WsParser = require('simples/lib/parsers/ws');
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const parseRequest = function (reqBody) {
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let jsonO;
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const parseJsonMaybe = (string) => {
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let object;
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try {
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jsonO = JSON.parse(reqBody);
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if (string && typeof string === 'string') object = JSON.parse(string);
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} catch (e) {
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return; // Request is not a json. Do nothing
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console.error('Error parsing string as JSON', string);
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} finally {
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// eslint-disable-next-line no-unsafe-finally
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return object;
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}
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if (jsonO.method === "eth_sendTransaction") {
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commList[jsonO.id] = {
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};
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exports.serve = async (ipc, host, port, ws, origin) => {
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const commList = {};
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const receipts = {};
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const transactions = {};
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const trackRequest = (req) => {
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if (!req) return;
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try {
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if (req.method === 'eth_sendTransaction') {
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commList[req.id] = {
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type: 'contract-log',
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address: jsonO.params[0].to,
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data: jsonO.params[0].data
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address: req.params[0].to,
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data: req.params[0].data
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};
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} else if (jsonO.method === "eth_getTransactionReceipt") {
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if (transactions[jsonO.params[0]]) {
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transactions[jsonO.params[0]].receiptId = jsonO.id;
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receipts[jsonO.id] = transactions[jsonO.params[0]].commListId;
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} else if (req.method === 'eth_getTransactionReceipt') {
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if (transactions[req.params[0]]) {
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transactions[req.params[0]].receiptId = req.id;
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receipts[req.id] = transactions[req.params[0]].commListId;
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}
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}
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} catch (e) {
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console.error('Error tracking request message', JSON.stringify(req));
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}
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};
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const parseResponse = function (ipc, resBody) {
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let jsonO;
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const trackResponse = (res) => {
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if (!res) return;
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try {
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jsonO = JSON.parse(resBody);
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} catch (e) {
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return; // Response is not a json. Do nothing
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if (commList[res.id]) {
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commList[res.id].transactionHash = res.result;
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transactions[res.result] = {commListId: res.id};
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} else if (receipts[res.id] && res.result && res.result.blockNumber) {
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// TODO find out why commList[receipts[res.id]] is sometimes not defined
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if (!commList[receipts[res.id]]) {
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commList[receipts[res.id]] = {};
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}
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if (commList[jsonO.id]) {
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commList[jsonO.id].transactionHash = jsonO.result;
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transactions[jsonO.result] = {commListId: jsonO.id};
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} else if (receipts[jsonO.id] && jsonO.result && jsonO.result.blockNumber) {
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// TODO find out why commList[receipts[jsonO.id]] is sometimes not defined
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if (!commList[receipts[jsonO.id]]) {
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commList[receipts[jsonO.id]] = {};
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}
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commList[receipts[jsonO.id]].blockNumber = jsonO.result.blockNumber;
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commList[receipts[jsonO.id]].gasUsed = jsonO.result.gasUsed;
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commList[receipts[jsonO.id]].status = jsonO.result.status;
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commList[receipts[res.id]].blockNumber = res.result.blockNumber;
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commList[receipts[res.id]].gasUsed = res.result.gasUsed;
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commList[receipts[res.id]].status = res.result.status;
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if (ipc.connected && !ipc.connecting) {
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ipc.request('log', commList[receipts[jsonO.id]]);
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ipc.request('log', commList[receipts[res.id]]);
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} else {
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const message = commList[receipts[jsonO.id]];
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const message = commList[receipts[res.id]];
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ipc.connecting = true;
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ipc.connect(() => {
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ipc.connecting = false;
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ipc.request('log', message);
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});
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}
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delete transactions[commList[receipts[jsonO.id]].transactionHash];
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delete commList[receipts[jsonO.id]];
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delete receipts[jsonO.id];
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delete transactions[commList[receipts[res.id]].transactionHash];
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delete commList[receipts[res.id]];
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delete receipts[res.id];
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}
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} catch (e) {
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console.error('Error tracking response message', JSON.stringify(res));
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}
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};
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exports.serve = async function (ipc, host, port, ws, origin) {
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const _origin = origin ? origin.split(',')[0] : undefined;
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const start = Date.now();
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function awaitTarget() {
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await (function waitOnTarget() {
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return new Promise(resolve => {
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utils.pingEndpoint(
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canonicalHost(host), port, ws ? 'ws': false, 'http', _origin, async (err) => {
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canonicalHost(host),
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port,
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ws ? 'ws': false,
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'http',
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origin ? origin.split(',')[0] : undefined,
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(err) => {
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if (!err || (Date.now() - start > 10000)) {
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return resolve();
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resolve();
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} else {
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utils.timer(250).then(waitOnTarget).then(resolve);
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}
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await utils.timer(250).then(awaitTarget).then(resolve);
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}
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);
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});
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}
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}());
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await awaitTarget();
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const proxyOpts = {
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logLevel: 'warn',
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target: `http://${canonicalHost(host)}:${port}`,
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ws: ws,
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let proxy = httpProxy.createProxyServer({
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target: {
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host: canonicalHost(host),
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port: port
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onError(err, _req, _res) {
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console.error(
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__('Error forwarding requests to blockchain/simulator'),
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err.message
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);
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},
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ws: ws
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});
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proxy.on('error', function (e) {
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console.error(__("Error forwarding requests to blockchain/simulator"), e.message);
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onProxyReq(_proxyReq, req, _res) {
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if (req.method === 'POST') {
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// messages TO the target
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Asm.connectTo(chain([
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req,
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parser()
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])).on('done', ({current: object}) => {
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trackRequest(object);
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});
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proxy.on('proxyRes', (proxyRes) => {
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let resBody = [];
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proxyRes.on('data', (b) => resBody.push(b));
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proxyRes.on('end', function () {
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resBody = Buffer.concat(resBody).toString();
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if (resBody) {
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parseResponse(ipc, resBody);
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}
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});
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});
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},
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let server = http.createServer((req, res) => {
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let reqBody = [];
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req.on('data', (b) => {
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reqBody.push(b);
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})
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.on('end', () => {
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reqBody = Buffer.concat(reqBody).toString();
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if (reqBody) {
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parseRequest(reqBody);
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}
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onProxyRes(proxyRes, req, _res) {
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if (req.method === 'POST') {
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// messages FROM the target
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Asm.connectTo(chain([
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proxyRes,
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parser()
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])).on('done', ({current: object}) => {
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trackResponse(object);
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});
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if (!ws) {
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proxy.web(req, res);
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}
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});
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}
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};
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if (ws) {
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const WsParser = require('simples/lib/parsers/ws'); // npm install simples
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server.on('upgrade', function (req, socket, head) {
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proxy.ws(req, socket, head);
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});
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proxy.on('open', (proxySocket) => {
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proxySocket.on('data', (data) => {
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parseResponse(ipc, data.toString().substr(data.indexOf("{")));
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});
|
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});
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proxy.on('proxyReqWs', (proxyReq, req, socket) => {
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var parser = new WsParser(0, false);
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socket.pipe(parser);
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parser.on('frame', function (frame) {
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parseRequest(frame.data);
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});
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proxyOpts.onProxyReqWs = (_proxyReq, _req, socket, _options, _head) => {
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// messages TO the target
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const wsp = new WsParser(0, false);
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wsp.on('frame', ({data: buffer}) => {
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const object = parseJsonMaybe(buffer.toString());
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trackRequest(object);
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});
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pump(cloneable(socket), wsp);
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};
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proxyOpts.onOpen = (proxySocket) => {
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// messages FROM the target
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const recv = new WebSocket.Receiver();
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recv.on('message', (data) => {
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const object = parseJsonMaybe(data);
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trackResponse(object);
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});
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pump(cloneable(proxySocket), recv);
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};
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}
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const listenPort = port - constants.blockchain.servicePortOnProxy;
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const proxy = proxyMiddleware(proxyOpts);
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const app = express();
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app.use('*', proxy);
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return new Promise(resolve => {
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server.listen(listenPort, defaultHost, () => {
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resolve(server);
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});
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const server = app.listen(
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port - constants.blockchain.servicePortOnProxy,
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defaultHost,
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() => { resolve(server); }
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);
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if (ws) {
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server.on('upgrade', proxy.upgrade);
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}
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});
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};
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|
|
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68
yarn.lock
68
yarn.lock
|
|
@ -3661,6 +3661,14 @@ clone@^1.0.2:
|
|||
resolved "https://registry.yarnpkg.com/clone/-/clone-1.0.4.tgz#da309cc263df15994c688ca902179ca3c7cd7c7e"
|
||||
integrity sha1-2jCcwmPfFZlMaIypAheco8fNfH4=
|
||||
|
||||
cloneable-readable@2.0.0:
|
||||
version "2.0.0"
|
||||
resolved "https://registry.yarnpkg.com/cloneable-readable/-/cloneable-readable-2.0.0.tgz#57b05f40f0dc95f5d6e18992c845f5fcf5b24f51"
|
||||
integrity sha512-YjptvQM0hnSgrEQJPnGu3MqaK3iZ+37HaVBf5/wHyViQUQOGz5w+C44DllnInlUQjDISTyErf4Xa+RFEF1QB3Q==
|
||||
dependencies:
|
||||
inherits "^2.0.1"
|
||||
readable-stream "^3.0.0"
|
||||
|
||||
co@^4.6.0:
|
||||
version "4.6.0"
|
||||
resolved "https://registry.yarnpkg.com/co/-/co-4.6.0.tgz#6ea6bdf3d853ae54ccb8e47bfa0bf3f9031fb184"
|
||||
|
|
@ -7496,6 +7504,16 @@ http-parser-js@>=0.4.0:
|
|||
resolved "https://registry.yarnpkg.com/http-parser-js/-/http-parser-js-0.5.0.tgz#d65edbede84349d0dc30320815a15d39cc3cbbd8"
|
||||
integrity sha512-cZdEF7r4gfRIq7ezX9J0T+kQmJNOub71dWbgAXVHDct80TKP4MCETtZQ31xyv38UwgzkWPYF/Xc0ge55dW9Z9w==
|
||||
|
||||
http-proxy-middleware@0.19.0:
|
||||
version "0.19.0"
|
||||
resolved "https://registry.yarnpkg.com/http-proxy-middleware/-/http-proxy-middleware-0.19.0.tgz#40992b5901dc44bc7bc3795da81b0b248eca02d8"
|
||||
integrity sha512-Ab/zKDy2B0404mz83bgki0HHv/xqpYKAyFXhopAiJaVAUSJfLYrpBYynTl4ZSUJ7TqrAgjarTsxdX5yBb4unRQ==
|
||||
dependencies:
|
||||
http-proxy "^1.17.0"
|
||||
is-glob "^4.0.0"
|
||||
lodash "^4.17.10"
|
||||
micromatch "^3.1.10"
|
||||
|
||||
http-proxy-middleware@~0.17.4:
|
||||
version "0.17.4"
|
||||
resolved "https://registry.yarnpkg.com/http-proxy-middleware/-/http-proxy-middleware-0.17.4.tgz#642e8848851d66f09d4f124912846dbaeb41b833"
|
||||
|
|
@ -7506,7 +7524,7 @@ http-proxy-middleware@~0.17.4:
|
|||
lodash "^4.17.2"
|
||||
micromatch "^2.3.11"
|
||||
|
||||
http-proxy@1.17.0, http-proxy@^1.16.2:
|
||||
http-proxy@^1.16.2, http-proxy@^1.17.0:
|
||||
version "1.17.0"
|
||||
resolved "https://registry.yarnpkg.com/http-proxy/-/http-proxy-1.17.0.tgz#7ad38494658f84605e2f6db4436df410f4e5be9a"
|
||||
integrity sha512-Taqn+3nNvYRfJ3bGvKfBSRwy1v6eePlm3oc/aWVxZp57DQr5Eq3xhKJi7Z4hZpS8PC3H4qI+Yly5EmFacGuA/g==
|
||||
|
|
@ -11707,6 +11725,14 @@ pull-traverse@^1.0.3:
|
|||
resolved "https://registry.yarnpkg.com/pull-traverse/-/pull-traverse-1.0.3.tgz#74fb5d7be7fa6bd7a78e97933e199b7945866938"
|
||||
integrity sha1-dPtde+f6a9enjpeTPhmbeUWGaTg=
|
||||
|
||||
pump@3.0.0, pump@^3.0.0:
|
||||
version "3.0.0"
|
||||
resolved "https://registry.yarnpkg.com/pump/-/pump-3.0.0.tgz#b4a2116815bde2f4e1ea602354e8c75565107a64"
|
||||
integrity sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww==
|
||||
dependencies:
|
||||
end-of-stream "^1.1.0"
|
||||
once "^1.3.1"
|
||||
|
||||
pump@^1.0.3:
|
||||
version "1.0.3"
|
||||
resolved "https://registry.yarnpkg.com/pump/-/pump-1.0.3.tgz#5dfe8311c33bbf6fc18261f9f34702c47c08a954"
|
||||
|
|
@ -11723,14 +11749,6 @@ pump@^2.0.0, pump@^2.0.1:
|
|||
end-of-stream "^1.1.0"
|
||||
once "^1.3.1"
|
||||
|
||||
pump@^3.0.0:
|
||||
version "3.0.0"
|
||||
resolved "https://registry.yarnpkg.com/pump/-/pump-3.0.0.tgz#b4a2116815bde2f4e1ea602354e8c75565107a64"
|
||||
integrity sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww==
|
||||
dependencies:
|
||||
end-of-stream "^1.1.0"
|
||||
once "^1.3.1"
|
||||
|
||||
pumpify@^1.3.3:
|
||||
version "1.5.1"
|
||||
resolved "https://registry.yarnpkg.com/pumpify/-/pumpify-1.5.1.tgz#36513be246ab27570b1a374a5ce278bfd74370ce"
|
||||
|
|
@ -12054,6 +12072,15 @@ readable-stream@^1.0.33:
|
|||
isarray "0.0.1"
|
||||
string_decoder "~0.10.x"
|
||||
|
||||
readable-stream@^3.0.0:
|
||||
version "3.0.6"
|
||||
resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.0.6.tgz#351302e4c68b5abd6a2ed55376a7f9a25be3057a"
|
||||
integrity sha512-9E1oLoOWfhSXHGv6QlwXJim7uNzd9EVlWK+21tCU9Ju/kR0/p2AZYPz4qSchgO8PlLIH4FpZYfzwS+rEksZjIg==
|
||||
dependencies:
|
||||
inherits "^2.0.3"
|
||||
string_decoder "^1.1.1"
|
||||
util-deprecate "^1.0.1"
|
||||
|
||||
readdirp@^2.0.0:
|
||||
version "2.2.1"
|
||||
resolved "https://registry.yarnpkg.com/readdirp/-/readdirp-2.2.1.tgz#0e87622a3325aa33e892285caf8b4e846529a525"
|
||||
|
|
@ -13554,6 +13581,11 @@ stream-browserify@^2.0.1:
|
|||
inherits "~2.0.1"
|
||||
readable-stream "^2.0.2"
|
||||
|
||||
stream-chain@^2.0.3:
|
||||
version "2.0.3"
|
||||
resolved "https://registry.yarnpkg.com/stream-chain/-/stream-chain-2.0.3.tgz#9155237a719c8bb2de883c2d1af66d1546f910c9"
|
||||
integrity sha512-uCjJTDTAOgBrM2dLkS3mJGICUV3fL0eiTsGQ0bXiKU6et6/7dkTzZCp0eP1d8ZIwiWjthvQZlSx7NxMt7t1aFQ==
|
||||
|
||||
stream-each@^1.1.0:
|
||||
version "1.2.3"
|
||||
resolved "https://registry.yarnpkg.com/stream-each/-/stream-each-1.2.3.tgz#ebe27a0c389b04fbcc233642952e10731afa9bae"
|
||||
|
|
@ -13573,6 +13605,13 @@ stream-http@^2.7.2:
|
|||
to-arraybuffer "^1.0.0"
|
||||
xtend "^4.0.0"
|
||||
|
||||
stream-json@1.1.3:
|
||||
version "1.1.3"
|
||||
resolved "https://registry.yarnpkg.com/stream-json/-/stream-json-1.1.3.tgz#4ebef75590f3af2a7291726a8e2bb2ce06d2c166"
|
||||
integrity sha512-y+ChhCov2A5nDqC2aZ6HKXs3OvDlvAp0Ps3BF1P/Iv8tUZJQQsMVaSzk0WryVTVoGITKv01UYahCXMpAs7I0lQ==
|
||||
dependencies:
|
||||
stream-chain "^2.0.3"
|
||||
|
||||
stream-shift@^1.0.0:
|
||||
version "1.0.0"
|
||||
resolved "https://registry.yarnpkg.com/stream-shift/-/stream-shift-1.0.0.tgz#d5c752825e5367e786f78e18e445ea223a155952"
|
||||
|
|
@ -13646,7 +13685,7 @@ string.prototype.trim@~1.1.2:
|
|||
es-abstract "^1.5.0"
|
||||
function-bind "^1.0.2"
|
||||
|
||||
string_decoder@^1.0.0:
|
||||
string_decoder@^1.0.0, string_decoder@^1.1.1:
|
||||
version "1.2.0"
|
||||
resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.2.0.tgz#fe86e738b19544afe70469243b2a1ee9240eae8d"
|
||||
integrity sha512-6YqyX6ZWEYguAxgZzHGL7SsCeGx3V2TtOTqZz1xSTSWnqsbWwbptafNyvf/ACquZUXV3DANr5BDIwNYe1mN42w==
|
||||
|
|
@ -14665,7 +14704,7 @@ utf8@^2.1.1:
|
|||
resolved "https://registry.yarnpkg.com/utf8/-/utf8-2.1.2.tgz#1fa0d9270e9be850d9b05027f63519bf46457d96"
|
||||
integrity sha1-H6DZJw6b6FDZsFAn9jUZv0ZFfZY=
|
||||
|
||||
util-deprecate@~1.0.1:
|
||||
util-deprecate@^1.0.1, util-deprecate@~1.0.1:
|
||||
version "1.0.2"
|
||||
resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
|
||||
integrity sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=
|
||||
|
|
@ -15838,6 +15877,13 @@ write@^0.2.1:
|
|||
dependencies:
|
||||
mkdirp "^0.5.1"
|
||||
|
||||
ws@6.1.2:
|
||||
version "6.1.2"
|
||||
resolved "https://registry.yarnpkg.com/ws/-/ws-6.1.2.tgz#3cc7462e98792f0ac679424148903ded3b9c3ad8"
|
||||
integrity sha512-rfUqzvz0WxmSXtJpPMX2EeASXabOrSMk1ruMOV3JBTBjo4ac2lDjGGsbQSyxj8Odhw5fBib8ZKEjDNvgouNKYw==
|
||||
dependencies:
|
||||
async-limiter "~1.0.0"
|
||||
|
||||
ws@^3.0.0:
|
||||
version "3.3.3"
|
||||
resolved "https://registry.yarnpkg.com/ws/-/ws-3.3.3.tgz#f1cf84fe2d5e901ebce94efaece785f187a228f2"
|
||||
|
|
|
|||
Loading…
Reference in New Issue