fix(reverse-proxy): increase request header size limit (#1770)

packages/reverse-proxy-service/src/server.ts

@@ -12,6 +12,11 @@ import store from './setup/store';
 import { COOKIE_SECRET } from './setup/env';
 import oidcAuth from './middleware/oidcAuth';
 import { updateApplicationCache } from './utils/applicationCache';
+import http from 'http';
+
+const MAX_HEADER_SIZE = 16 * 1024 * 1024; // 16MB
+
+( http.globalAgent as http.Agent ).maxHeaderSize = MAX_HEADER_SIZE;
 
 const getServer = async () => {
   const server = express();

packages/reverse-proxy-service/src/types/http.d.ts

@@ -0,0 +1,7 @@
+import * as http from 'http';
+
+declare module 'http' {
+    interface Agent {
+        maxHeaderSize?: number;
+    }
+}

packages/reverse-proxy-service/tsconfig.json

@@ -50,7 +50,10 @@
     // "baseUrl": "./",                             /* Base directory to resolve non-absolute module names. */
     // "paths": {},                                 /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
     // "rootDirs": [],                              /* List of root folders whose combined content represents the structure of the project at runtime. */
-    // "typeRoots": [],                             /* List of folders to include type definitions from. */
+    "typeRoots": [
+      "src/types",
+      "node_modules/@types"
+    ],
     // "types": [],                                 /* Type declaration files to be included in compilation. */
     // "allowSyntheticDefaultImports": true,        /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
     "esModuleInterop": true,                        /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */