Allow for open handle detection & sigint close

bin/webserver.mjs

@@ -6,6 +6,7 @@ import autoindex from 'express-autoindex/dist/index.cjs.js'
 import nunjucks from 'nunjucks'
 import cors from 'cors'
 import 'dotenv/config'
+import 'wtfnode'
 
 import { lastLedger } from '../lib/onLedger.mjs'
 import { txCount } from '../lib/onTransaction.mjs'
@@ -97,7 +98,15 @@ if (!wss) {
         })
       })
       
-      app.listen(port)
+      const server = app.listen(port)
+
+      // Play nice with Docker etc.
+      process.on('SIGINT', () => {
+        console.log('Shutting down webserver')
+        server.close()
+        wss.getWss().close()
+      })
+
       console.log('Started Event Socket Service at TCP port', port)
     } catch (e) {
       console.log('Cannot start Webserver & Event Socket Service at port', port, e)

index.mjs

@@ -4,15 +4,21 @@ import { onValidation } from './lib/onValidation.mjs'
 import { onLedger } from './lib/onLedger.mjs'
 import 'dotenv/config'
 import assert from 'assert'
+import wtf from 'wtfnode'
 import './bin/webserver.mjs'
 
+let sigintEventHandler = false
+
 assert(process.env?.NODES, 'ENV var missing: NODES, containing: a comma separated list of websocket endpoints')
 
 await createDirectory('store')
 await createDirectory('store/xpop')
 
-process.env.NODES.split(',').map(h => h.trim())
-  .map(h => new XrplClient(h)).map(async c => {
+const connections = process.env.NODES.split(',').map(h => h.trim())
+  .map(h => new XrplClient(h))
+
+connections
+  .map(async c => {
     
     const subscribe = async () => {
       await c.ready()
@@ -45,4 +51,25 @@ process.env.NODES.split(',').map(h => h.trim())
     }
 
     c.on('online', () => subscribe())
+
   })
+
+// Play nice with Docker etc.
+if (!sigintEventHandler) {
+  sigintEventHandler = true
+
+  process.on('SIGINT', () => {
+    connections
+      .map(async c => {
+        console.info('Interrupted', c.getState()?.server?.uri)
+        c.close()
+      })
+
+    if (process.env?.DEBUG) {
+      // Display open handles
+      console.log('-------------------')
+      wtf.dump()
+      console.log('-------------------' + `\n`)
+    }
+  })
+}

lib/events/ledgerReady.mjs

@@ -43,11 +43,12 @@ const ledgerReady = async (ledger, readyElement) => {
         vl,
         validation: 0,
         ready,
+        timeout: null,
       }
     })
 
     // Set timeout to clean up
-    setTimeout(() => {
+    ledgers[ledgerIndexString].timeout = setTimeout(() => {
       // console.log('Cleaning up', ledgerIndexString)
       if (ledgers?.[ledgerIndexString]) {
         ledgers?.[ledgerIndexString]?.ledger_binary_transactions?.resolve(false)
@@ -89,3 +90,13 @@ export {
   isLedgerReady,
   waitForLedgerReady,
 }
+
+// Play nice with Docker
+process.on('SIGINT', () => {
+  Object.values(ledgers).forEach(l => {
+    clearTimeout(l?.timeout)
+    l?.ledger_binary_transactions?.resolve(false)
+    l?.ledger_info?.resolve(false)
+    l?.vl?.resolve(false)
+  })
+})

package-lock.json

@@ -22,6 +22,7 @@
         "ripple-address-codec": "^4.3.0",
         "ripple-binary-codec": "^1.10.0",
         "ws": "^8.14.2",
+        "wtfnode": "^0.9.1",
         "xrpl-client": "^2.2.0"
       },
       "devDependencies": {
@@ -5037,6 +5038,14 @@
         }
       }
     },
+    "node_modules/wtfnode": {
+      "version": "0.9.1",
+      "resolved": "https://registry.npmjs.org/wtfnode/-/wtfnode-0.9.1.tgz",
+      "integrity": "sha512-Ip6C2KeQPl/F3aP1EfOnPoQk14Udd9lffpoqWDNH3Xt78svxPbv53ngtmtfI0q2Te3oTq79XKTnRNXVIn/GsPA==",
+      "bin": {
+        "wtfnode": "proxy.js"
+      }
+    },
     "node_modules/xrpl-client": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/xrpl-client/-/xrpl-client-2.2.0.tgz",

package.json

@@ -48,6 +48,7 @@
     "ripple-address-codec": "^4.3.0",
     "ripple-binary-codec": "^1.10.0",
     "ws": "^8.14.2",
+    "wtfnode": "^0.9.1",
     "xrpl-client": "^2.2.0"
   },
   "devDependencies": {