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feat: add Tavily search provider option to Express API #96

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feat: add Tavily search provider option to Express API #96

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6 changes: 5 additions & 1 deletion express-api/.env.example
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Original file line number Diff line number Diff line change
Expand Up @@ -3,4 +3,8 @@ OPENAI_API_KEY=APIKEYGOESHERE
# https://console.groq.com/keys
GROQ_API_KEY=APIKEYGOESHERE
# https://brave.com/search/api/
BRAVE_SEARCH_API_KEY=APIKEYGOESHERE
BRAVE_SEARCH_API_KEY=APIKEYGOESHERE
# https://app.tavily.com
TAVILY_API_KEY=APIKEYGOESHERE
# Search provider: 'brave' (default) or 'tavily'
SEARCH_PROVIDER=brave
28 changes: 21 additions & 7 deletions express-api/index.js
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Expand Up @@ -5,6 +5,7 @@ import { RecursiveCharacterTextSplitter } from 'langchain/text_splitter';
import { OpenAIEmbeddings } from '@langchain/openai';
import { MemoryVectorStore } from 'langchain/vectorstores/memory';
import { BraveSearch } from "@langchain/community/tools/brave_search";
import { tavily } from "@tavily/core";
import OpenAI from 'openai';
import cheerio from 'cheerio';
import dotenv from 'dotenv';
Expand Down Expand Up @@ -44,15 +45,28 @@ app.post('/', async (req, res) => {
// 10. Define search engine function
async function searchEngineForSources(message) {
console.log(`3. Initializing Search Engine Process`);
// 11. Initialize BraveSearch
const loader = new BraveSearch({ apiKey: process.env.BRAVE_SEARCH_API_KEY });
const searchProvider = process.env.SEARCH_PROVIDER || 'brave';
// 12. Rephrase the message
const rephrasedMessage = await rephraseInput(message);
console.log(`6. Rephrased message and got documents from BraveSearch`);
// 13. Get documents from BraveSearch
const docs = await loader.call(rephrasedMessage, { count: numberOfPagesToScan });
// 14. Normalize data
const normalizedData = normalizeData(docs);
let normalizedData;
if (searchProvider === 'tavily') {
// Tavily search path
console.log(`6. Rephrased message, searching with Tavily`);
const tvly = tavily({ apiKey: process.env.TAVILY_API_KEY });
const tavilyResponse = await tvly.search(rephrasedMessage, { maxResults: numberOfPagesToScan });
normalizedData = tavilyResponse.results
.filter((result) => result.title && result.url)
.slice(0, numberOfPagesToScan)
.map(({ title, url }) => ({ title, link: url }));
} else {
// 11. Initialize BraveSearch (default)
const loader = new BraveSearch({ apiKey: process.env.BRAVE_SEARCH_API_KEY });
console.log(`6. Rephrased message and got documents from BraveSearch`);
// 13. Get documents from BraveSearch
const docs = await loader.call(rephrasedMessage, { count: numberOfPagesToScan });
// 14. Normalize data
normalizedData = normalizeData(docs);
}
// 15. Process and vectorize the content
return await Promise.all(normalizedData.map(fetchAndProcess));
}
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1 change: 1 addition & 0 deletions express-api/package.json
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Expand Up @@ -15,6 +15,7 @@
"dotenv": "^16.4.5",
"express": "^4.18.3",
"langchain": "^0.1.25",
"@tavily/core": "^0.0.7",
"openai": "^4.28.4"
},
"scripts": {
Expand Down