🚨 feat: Implement INPUT_LENGTH Error Type (#3866)

* feat: CONTEXT_LENGTH error type

* chore: rename error type

* chore: import order

api/app/clients/BaseClient.js

@@ -1,6 +1,12 @@
 const crypto = require('crypto');
 const fetch = require('node-fetch');
-const { supportsBalanceCheck, Constants, CacheKeys, Time } = require('librechat-data-provider');
+const {
+  supportsBalanceCheck,
+  ErrorTypes,
+  Constants,
+  CacheKeys,
+  Time,
+} = require('librechat-data-provider');
 const { getMessages, saveMessage, updateMessage, saveConvo } = require('~/models');
 const { addSpaceIfNeeded, isEnabled } = require('~/server/utils');
 const checkBalance = require('~/models/checkBalance');
@@ -383,9 +389,10 @@ class BaseClient {
 
     const latestMessage = orderedWithInstructions[orderedWithInstructions.length - 1];
     if (payload.length === 0 && !shouldSummarize && latestMessage) {
-      throw new Error(
-        `Prompt token count of ${latestMessage.tokenCount} exceeds max token count of ${this.maxContextTokens}.`,
-      );
+      const info = `${latestMessage.tokenCount} / ${this.maxContextTokens}`;
+      const errorMessage = `{ "type": "${ErrorTypes.INPUT_LENGTH}", "info": "${info}" }`;
+      logger.warn(`Prompt token count exceeds max token count (${info}).`);
+      throw new Error(errorMessage);
     }
 
     if (usePrevSummary) {

client/src/components/Messages/Content/Error.tsx

@@ -33,6 +33,10 @@ type TExpiredKey = {
   endpoint: string;
 };
 
+type TInputLength = {
+  info: string;
+};
+
 const errorMessages = {
   [ErrorTypes.MODERATION]: 'com_error_moderation',
   [ErrorTypes.NO_USER_KEY]: 'com_error_no_user_key',
@@ -42,6 +46,10 @@ const errorMessages = {
     const { expiredAt, endpoint } = json;
     return localize('com_error_expired_user_key', endpoint, expiredAt);
   },
+  [ErrorTypes.INPUT_LENGTH]: (json: TInputLength, localize: LocalizeFunction) => {
+    const { info } = json;
+    return localize('com_error_input_length', info);
+  },
   [ViolationTypes.BAN]:
     'Your account has been temporarily banned due to violations of our service.',
   invalid_api_key:

client/src/localization/languages/Eng.ts

@@ -25,6 +25,8 @@ export default {
   com_error_invalid_user_key: 'Invalid key provided. Please provide a valid key and try again.',
   com_error_expired_user_key:
     'Provided key for {0} expired at {1}. Please provide a new key and try again.',
+  com_error_input_length:
+    'The latest message token count is too long, exceeding the token limit ({0} respectively). Please shorten your message, adjust the max context size from the conversation parameters, or fork the conversation to continue.',
   com_files_no_results: 'No results.',
   com_files_filter: 'Filter files...',
   com_files_number_selected: '{0} of {1} file(s) selected',

packages/data-provider/src/config.ts

@@ -839,6 +839,11 @@ export enum ErrorTypes {
    * Moderation error
    */
   MODERATION = 'moderation',
+
+  /**
+   * Prompt exceeds max length
+   */
+  INPUT_LENGTH = 'INPUT_LENGTH',
 }
 
 /**