fix: ensure maxSockets is respected (#7324)

Fixes #7072

deps: agent-base@7.1.1

chore: add smoke-test for large prod installs

Author: lukekarrys

node_modules/agent-base/LICENSE

@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2013 Nathan Rajlich <nathan@tootallnate.net>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/agent-base/dist/index.js

@@ -27,7 +27,9 @@ var __exportStar = (this && this.__exportStar) || function(m, exports) {
 };
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.Agent = void 0;
+const net = __importStar(require("net"));
 const http = __importStar(require("http"));
+const https_1 = require("https");
 __exportStar(require("./helpers"), exports);
 const INTERNAL = Symbol('AgentBaseInternalState');
 class Agent extends http.Agent {
@@ -64,22 +66,83 @@ class Agent extends http.Agent {
             .some((l) => l.indexOf('(https.js:') !== -1 ||
             l.indexOf('node:https:') !== -1);
     }
+    // In order to support async signatures in `connect()` and Node's native
+    // connection pooling in `http.Agent`, the array of sockets for each origin
+    // has to be updated synchronously. This is so the length of the array is
+    // accurate when `addRequest()` is next called. We achieve this by creating a
+    // fake socket and adding it to `sockets[origin]` and incrementing
+    // `totalSocketCount`.
+    incrementSockets(name) {
+        // If `maxSockets` and `maxTotalSockets` are both Infinity then there is no
+        // need to create a fake socket because Node.js native connection pooling
+        // will never be invoked.
+        if (this.maxSockets === Infinity && this.maxTotalSockets === Infinity) {
+            return null;
+        }
+        // All instances of `sockets` are expected TypeScript errors. The
+        // alternative is to add it as a private property of this class but that
+        // will break TypeScript subclassing.
+        if (!this.sockets[name]) {
+            // @ts-expect-error `sockets` is readonly in `@types/node`
+            this.sockets[name] = [];
+        }
+        const fakeSocket = new net.Socket({ writable: false });
+        this.sockets[name].push(fakeSocket);
+        // @ts-expect-error `totalSocketCount` isn't defined in `@types/node`
+        this.totalSocketCount++;
+        return fakeSocket;
+    }
+    decrementSockets(name, socket) {
+        if (!this.sockets[name] || socket === null) {
+            return;
+        }
+        const sockets = this.sockets[name];
+        const index = sockets.indexOf(socket);
+        if (index !== -1) {
+            sockets.splice(index, 1);
+            // @ts-expect-error  `totalSocketCount` isn't defined in `@types/node`
+            this.totalSocketCount--;
+            if (sockets.length === 0) {
+                // @ts-expect-error `sockets` is readonly in `@types/node`
+                delete this.sockets[name];
+            }
+        }
+    }
+    // In order to properly update the socket pool, we need to call `getName()` on
+    // the core `https.Agent` if it is a secureEndpoint.
+    getName(options) {
+        const secureEndpoint = typeof options.secureEndpoint === 'boolean'
+            ? options.secureEndpoint
+            : this.isSecureEndpoint(options);
+        if (secureEndpoint) {
+            // @ts-expect-error `getName()` isn't defined in `@types/node`
+            return https_1.Agent.prototype.getName.call(this, options);
+        }
+        // @ts-expect-error `getName()` isn't defined in `@types/node`
+        return super.getName(options);
+    }
     createSocket(req, options, cb) {
         const connectOpts = {
             ...options,
             secureEndpoint: this.isSecureEndpoint(options),
         };
+        const name = this.getName(connectOpts);
+        const fakeSocket = this.incrementSockets(name);
         Promise.resolve()
             .then(() => this.connect(req, connectOpts))
             .then((socket) => {
+            this.decrementSockets(name, fakeSocket);
             if (socket instanceof http.Agent) {
                 // @ts-expect-error `addRequest()` isn't defined in `@types/node`
                 return socket.addRequest(req, connectOpts);
             }
             this[INTERNAL].currentSocket = socket;
             // @ts-expect-error `createSocket()` isn't defined in `@types/node`
             super.createSocket(req, options, cb);
-        }, cb);
+        }, (err) => {
+            this.decrementSockets(name, fakeSocket);
+            cb(err);
+        });
     }
     createConnection() {
         const socket = this[INTERNAL].currentSocket;

node_modules/agent-base/package.json

@@ -1,6 +1,6 @@
 {
   "name": "agent-base",
-  "version": "7.1.0",
+  "version": "7.1.1",
   "description": "Turn a function into an `http.Agent` instance",
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",

package-lock.json

@@ -2410,9 +2410,9 @@
       }
     },
     "node_modules/agent-base": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-7.1.0.tgz",
-      "integrity": "sha512-o/zjMZRhJxny7OyEF+Op8X+efiELC7k7yOjMzgfzVqOzXqkBkWI79YoTdOtsuWd5BWhAGAuOY/Xa6xpiaWXiNg==",
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-7.1.1.tgz",
+      "integrity": "sha512-H0TSyFNDMomMNJQBn8wFV5YC/2eJ+VXECwOadZJT554xP6cODZHPX3H9QMQECxvrgiSOP1pHjy1sMWQVYJOUOA==",
       "inBundle": true,
       "dependencies": {
         "debug": "^4.3.4"