Move all Horde requests to server

public/scripts/horde.js

@@ -2,7 +2,6 @@ import {
     saveSettingsDebounced,
     callPopup,
     setGenerationProgress,
-    CLIENT_VERSION,
     getRequestHeaders,
     max_context,
     amount_gen,
@@ -34,19 +33,96 @@ let horde_settings = {
 const MAX_RETRIES = 480;
 const CHECK_INTERVAL = 2500;
 const MIN_LENGTH = 16;
-const getRequestArgs = () => ({
-    method: 'GET',
-    headers: {
-        'Client-Agent': CLIENT_VERSION,
-    },
-});
 
-async function getWorkers(workerType) {
+/**
-    const response = await fetch('https://horde.koboldai.net/api/v2/workers?type=text', getRequestArgs());
+ * Gets the available workers from Horde.
+ * @param {boolean} force Do a force refresh of the workers
+ * @returns {Promise<Array>} Array of workers
+ */
+async function getWorkers(force) {
+    const response = await fetch('/api/horde/text-workers', {
+        method: 'POST',
+        headers: getRequestHeaders(),
+        body: JSON.stringify({ force }),
+    });
     const data = await response.json();
     return data;
 }
 
+/**
+ * Gets the available models from Horde.
+ * @param {boolean} force Do a force refresh of the models
+ * @returns {Promise<Array>} Array of models
+ */
+async function getModels(force) {
+    const response = await fetch('/api/horde/text-models', {
+        method: 'POST',
+        headers: getRequestHeaders(),
+        body: JSON.stringify({ force }),
+    });
+    const data = await response.json();
+    return data;
+}
+
+/**
+ * Gets the status of a Horde task.
+ * @param {string} taskId Task ID
+ * @returns {Promise<Object>} Task status
+ */
+async function getTaskStatus(taskId) {
+    const response =  await fetch('/api/horde/task-status', {
+        method: 'POST',
+        headers: getRequestHeaders(),
+        body: JSON.stringify({ taskId }),
+    });
+
+    if (!response.ok) {
+        throw new Error(`Failed to get task status: ${response.statusText}`);
+    }
+
+    const data = await response.json();
+    return data;
+}
+
+/**
+ * Cancels a Horde task.
+ * @param {string} taskId Task ID
+ */
+async function cancelTask(taskId) {
+    const response = await fetch('/api/horde/cancel-task', {
+        method: 'POST',
+        headers: getRequestHeaders(),
+        body: JSON.stringify({ taskId }),
+    });
+
+    if (!response.ok) {
+        throw new Error(`Failed to cancel task: ${response.statusText}`);
+    }
+}
+
+/**
+ * Checks if Horde is online.
+ * @returns {Promise<boolean>} True if Horde is online, false otherwise
+ */
+async function checkHordeStatus() {
+    try {
+        const response = await fetch('/api/horde/status', {
+            method: 'POST',
+            headers: getRequestHeaders(),
+        });
+
+        if (!response.ok) {
+            return false;
+        }
+
+        const data = await response.json();
+        return data.ok;
+    } catch (error) {
+        console.error(error);
+        return false;
+    }
+}
+
 function validateHordeModel() {
     let selectedModels = models.filter(m => horde_settings.models.includes(m.name));
 
@@ -60,7 +136,7 @@ function validateHordeModel() {
 
 async function adjustHordeGenerationParams(max_context_length, max_length) {
     console.log(max_context_length, max_length);
-    const workers = await getWorkers();
+    const workers = await getWorkers(false);
     let maxContextLength = max_context_length;
     let maxLength = max_length;
     let availableWorkers = [];
@@ -126,10 +202,7 @@ async function generateHorde(prompt, params, signal, reportProgress) {
 
     const response = await fetch('/api/horde/generate-text', {
         method: 'POST',
-        headers: {
+        headers: getRequestHeaders(),
-            ...getRequestHeaders(),
-            'Client-Agent': CLIENT_VERSION,
-        },
         body: JSON.stringify(payload),
     });
 
@@ -146,24 +219,17 @@ async function generateHorde(prompt, params, signal, reportProgress) {
         throw new Error(`Horde generation failed: ${reason}`);
     }
 
-    const task_id = responseJson.id;
+    const taskId = responseJson.id;
     let queue_position_first = null;
-    console.log(`Horde task id = ${task_id}`);
+    console.log(`Horde task id = ${taskId}`);
 
     for (let retryNumber = 0; retryNumber < MAX_RETRIES; retryNumber++) {
         if (signal.aborted) {
-            fetch(`https://horde.koboldai.net/api/v2/generate/text/status/${task_id}`, {
+            cancelTask(taskId);
-                method: 'DELETE',
-                headers: {
-                    'Client-Agent': CLIENT_VERSION,
-                },
-            });
             throw new Error('Request aborted');
         }
 
-        const statusCheckResponse = await fetch(`https://horde.koboldai.net/api/v2/generate/text/status/${task_id}`, getRequestArgs());
+        const statusCheckJson = await getTaskStatus(taskId);
-
-        const statusCheckJson = await statusCheckResponse.json();
         console.log(statusCheckJson);
 
         if (statusCheckJson.faulted === true) {
@@ -202,18 +268,13 @@ async function generateHorde(prompt, params, signal, reportProgress) {
     throw new Error('Horde timeout');
 }
 
-async function checkHordeStatus() {
+/**
-    const response = await fetch('https://horde.koboldai.net/api/v2/status/heartbeat', getRequestArgs());
+ * Displays the available models in the Horde model selection dropdown.
-    return response.ok;
+ * @param {boolean} force Force refresh of the models
-}
+ */
-
+async function getHordeModels(force) {
-async function getHordeModels() {
     $('#horde_model').empty();
-    const response = await fetch('https://horde.koboldai.net/api/v2/status/models?type=text', getRequestArgs());
+    models = (await getModels(force)).sort((a, b) => b.performance - a.performance);
-    models = await response.json();
-    models.sort((a, b) => {
-        return b.performance - a.performance;
-    });
     for (const model of models) {
         const option = document.createElement('option');
         option.value = model.name;
@@ -299,7 +360,7 @@ jQuery(function () {
         await writeSecret(SECRET_KEYS.HORDE, key);
     });
 
-    $('#horde_refresh').on('click', getHordeModels);
+    $('#horde_refresh').on('click', () => getHordeModels(true));
     $('#horde_kudos').on('click', showKudos);
 
     // Not needed on mobile

src/endpoints/horde.js

@@ -1,20 +1,30 @@
 const fetch = require('node-fetch').default;
 const express = require('express');
 const AIHorde = require('../ai_horde');
-const { getVersion, delay } = require('../util');
+const { getVersion, delay, Cache } = require('../util');
 const { readSecret, SECRET_KEYS } = require('./secrets');
 const { jsonParser } = require('../express-common');
 
 const ANONYMOUS_KEY = '0000000000';
+const cache = new Cache(60 * 1000);
+const router = express.Router();
+
+/**
+ * Returns the AIHorde client agent.
+ * @returns {Promise<string>} AIHorde client agent
+ */
+async function getClientAgent() {
+    const version = await getVersion();
+    return version?.agent || 'SillyTavern:UNKNOWN:Cohee#1207';
+}
 
 /**
  * Returns the AIHorde client.
  * @returns {Promise<AIHorde>} AIHorde client
  */
 async function getHordeClient() {
-    const version = await getVersion();
     const ai_horde = new AIHorde({
-        client_agent: version?.agent || 'SillyTavern:UNKNOWN:Cohee#1207',
+        client_agent: await getClientAgent(),
     });
     return ai_horde;
 }
@@ -46,11 +56,112 @@ function sanitizeHordeImagePrompt(prompt) {
     return prompt;
 }
 
-const router = express.Router();
+router.post('/text-workers', jsonParser, async (request, response) => {
+    try {
+        const cachedWorkers = cache.get('workers');
+
+        if (cachedWorkers && !request.body.force) {
+            return response.send(cachedWorkers);
+        }
+
+        const agent = await getClientAgent();
+        const fetchResult = await fetch('https://horde.koboldai.net/api/v2/workers?type=text', {
+            headers: {
+                'Client-Agent': agent,
+            },
+        });
+        const data = await fetchResult.json();
+        cache.set('workers', data);
+        return response.send(data);
+    } catch (error) {
+        console.error(error);
+        response.sendStatus(500);
+    }
+});
+
+router.post('/text-models', jsonParser, async (request, response) => {
+    try {
+        const cachedModels = cache.get('models');
+
+        if (cachedModels && !request.body.force) {
+            return response.send(cachedModels);
+        }
+
+        const agent = await getClientAgent();
+        const fetchResult = await fetch('https://horde.koboldai.net/api/v2/status/models?type=text', {
+            headers: {
+                'Client-Agent': agent,
+            },
+        });
+
+        const data = await fetchResult.json();
+        cache.set('models', data);
+        return response.send(data);
+    } catch (error) {
+        console.error(error);
+        response.sendStatus(500);
+    }
+});
+
+router.post('/status', jsonParser, async (_, response) => {
+    try {
+        const agent = await getClientAgent();
+        const fetchResult = await fetch('https://horde.koboldai.net/api/v2/status/heartbeat', {
+            headers: {
+                'Client-Agent': agent,
+            },
+        });
+
+        return response.send({ ok: fetchResult.ok });
+    } catch (error) {
+        console.error(error);
+        response.sendStatus(500);
+    }
+});
+
+router.post('/cancel-task', jsonParser, async (request, response) => {
+    try {
+        const taskId = request.body.taskId;
+        const agent = await getClientAgent();
+        const fetchResult = await fetch(`https://horde.koboldai.net/api/v2/generate/text/status/${taskId}`, {
+            method: 'DELETE',
+            headers: {
+                'Client-Agent': agent,
+            },
+        });
+
+        const data = await fetchResult.json();
+        console.log(`Cancelled Horde task ${taskId}`);
+        return response.send(data);
+    } catch (error) {
+        console.error(error);
+        response.sendStatus(500);
+    }
+});
+
+router.post('/task-status', jsonParser, async (request, response) => {
+    try {
+        const taskId = request.body.taskId;
+        const agent = await getClientAgent();
+        const fetchResult = await fetch(`https://horde.koboldai.net/api/v2/generate/text/status/${taskId}`, {
+            headers: {
+                'Client-Agent': agent,
+            },
+        });
+
+        const data = await fetchResult.json();
+        console.log(`Horde task ${taskId} status:`, data);
+        return response.send(data);
+    } catch (error) {
+        console.error(error);
+        response.sendStatus(500);
+    }
+});
 
 router.post('/generate-text', jsonParser, async (request, response) => {
-    const api_key_horde = readSecret(SECRET_KEYS.HORDE) || ANONYMOUS_KEY;
+    const apiKey = readSecret(SECRET_KEYS.HORDE) || ANONYMOUS_KEY;
     const url = 'https://horde.koboldai.net/api/v2/generate/text/async';
+    const agent = await getClientAgent();
 
     console.log(request.body);
     try {
@@ -59,8 +170,8 @@ router.post('/generate-text', jsonParser, async (request, response) => {
             body: JSON.stringify(request.body),
             headers: {
                 'Content-Type': 'application/json',
-                'apikey': api_key_horde,
+                'apikey': apiKey,
-                'Client-Agent': String(request.header('Client-Agent')),
+                'Client-Agent': agent,
             },
         });
 

src/util.js

@@ -467,6 +467,61 @@ function trimV1(str) {
     return String(str ?? '').replace(/\/$/, '').replace(/\/v1$/, '');
 }
 
+/**
+ * Simple TTL memory cache.
+ */
+class Cache {
+    /**
+     * @param {number} ttl Time to live in milliseconds
+     */
+    constructor(ttl) {
+        this.cache = new Map();
+        this.ttl = ttl;
+    }
+
+    /**
+     * Gets a value from the cache.
+     * @param {string} key Cache key
+     */
+    get(key) {
+        const value = this.cache.get(key);
+        if (value?.expiry > Date.now()) {
+            return value.value;
+        }
+
+        // Cache miss or expired, remove the key
+        this.cache.delete(key);
+        return null;
+    }
+
+    /**
+     * Sets a value in the cache.
+     * @param {string} key Key
+     * @param {object} value Value
+     */
+    set(key, value) {
+        this.cache.set(key, {
+            value: value,
+            expiry: Date.now() + this.ttl,
+        });
+    }
+
+    /**
+     * Removes a value from the cache.
+     * @param {string} key Key
+     */
+    remove(key) {
+        this.cache.delete(key);
+    }
+
+    /**
+     * Clears the cache.
+     */
+    clear() {
+        this.cache.clear();
+    }
+}
+
 module.exports = {
     getConfig,
     getConfigValue,
@@ -491,4 +546,5 @@ module.exports = {
     mergeObjectWithYaml,
     excludeKeysByYaml,
     trimV1,
+    Cache,
 };