fix(chat): increase max headers size (Issue #2852)

apps/chat/README.md

@@ -131,6 +131,7 @@ AI DIAL Chat uses environment variables for configuration. All environment varia
 | `SHOW_TOKEN_SUB`                          |    No    | Show token sub in refresh login error logs                                                                                                                                                                                                                                                                                    | `true`, `false`                                                                                  | `false`                                                                                                                            |
 | `STORAGE_TYPE`                            |    No    | Type of storage used for getting and saving information generated by a user.<br />**Note**: currently, `api` is the only supported value.                                                                                                                                                                                     | `browserStorage`, `api`                                                                          | `api`                                                                                                                              |
 | `KEEP_ALIVE_TIMEOUT`                      |    No    | Determines the maximum time in milliseconds for an idle connection before it is closed by the server.<br />This is needed because infrastructures usually have a default keep alive timeout 60 seconds and the Next server should have a larger value.<br />**Note**: this variable is used only when running a `dockerfile`. | Any number string                                                                                | `61000`                                                                                                                            |
+| `MAX_HTTP_HEADERS_SIZE`                   |    No    | Defines the maximum size of headers for Next.js server. <br />**Note**: this variable is used only when running a `dockerfile`.                                                                                                                                                                                               | `32768`                                                                                          |
 | `MAX_PROMPT_TOKENS_DEFAULT_PERCENT`       |    No    | A share in percent of `MAX_PROMPT_TOKENS_DEFAULT_VALUE`.<br />If not set, the value of `MAX_PROMPT_TOKENS_DEFAULT_VALUE` applies.                                                                                                                                                                                             | Any string                                                                                       | `75`                                                                                                                               |
 | `MAX_PROMPT_TOKENS_DEFAULT_VALUE`         |    No    | The default maximum limit of tokens permissible for any model.<br />Applies if a limit is not defined in the [AI DIAL Core](https://github.com/epam/ai-dial-core?tab=readme-ov-file#dynamic-settings) configuration.                                                                                                          | Any string                                                                                       | `2000`                                                                                                                             |
 | `CUSTOM_VISUALIZERS`                      |    No    | A list of configurations of custom visualizers.<br />Refer to [Chat Visualizer](../../libs/chat-visualizer-connector/README.md) to learn more.                                                                                                                                                                                | [{ title, description, icon, contentType, url }]                                                 |                                                                                                                                    |

package.json

@@ -3,7 +3,7 @@
   "version": "0.23.0-rc",
   "private": true,
   "scripts": {
-    "nx": "nx",
+    "nx": "NODE_OPTIONS='--max-http-header-size=32768' nx",
     "postinstall": "patch-package && node tools/patch-nextjs.js",
     "graph": "nx graph",
     "build": "nx run-many -t build",

startup.sh

@@ -1,5 +1,8 @@
 #!/bin/sh
 
 KEEP_ALIVE_TIMEOUT="${KEEP_ALIVE_TIMEOUT:-61000}"
+MAX_HTTP_HEADERS_SIZE="${MAX_HTTP_HEADERS_SIZE:-32768}"
 
-exec npm start -- --keepAliveTimeout $KEEP_ALIVE_TIMEOUT
+export NODE_OPTIONS="--max-http-header-size=$MAX_HTTP_HEADERS_SIZE ${NODE_OPTIONS}"
+
+exec npm start -- --keepAliveTimeout $KEEP_ALIVE_TIMEOUT