Connection error when using langchain within VS Code Extension (Host)

langchain-ai / langchainjs

🦜🔗 Build context-aware reasoning applications 🦜🔗

MIT License

12.75k stars 2.2k forks source link

// This is not easily reproductible because it has to be included inside a VS Code extension to fails... // I don't know enought about creating VS Code extensions to create a minimal working example // Although this is the implementation I use to generate a completion // Retrieve proxy settings const httpConfig = vscode.workspace.getConfiguration('http'); const proxy = httpConfig.get('proxy'); logger.info('Retrieved proxy settings:', proxy); if (proxy) { logger.info('Proxy detected. Configuring Axios to use the proxy.'); const agent = new HttpsProxyAgent(proxy); axios.defaults.proxy = false; // Disable default Axios proxy behavior axios.defaults.httpsAgent = agent; logger.info('Axios proxy configuration complete.'); } else { logger.info('No proxy detected. Proceeding without proxy configuration.'); } try { model = new ChatOpenAI({ modelName: 'gpt-4o-mini', // same issue with gpt-4o, same issue also with GroqChat maxRetries: 1, }); try { const response = await model.invoke( [ [ "system", "You are a helpful assistant that translates English to French. Translate the user sentence.", ], [ "human", "I love programming.", ], ] ); logger.info(`LLM response: ${response}`); } catch (error) { logger.error(`Error message: ${error.message}`); logger.error(`Error stack trace: ${error.stack}`); } } catch (error) { logger.info(`chatgpt.model: ${provider.modelManager.model} response: ${error}`); throw error; }

Hey @jeanibarz! I'm here to help you out with any bugs, questions, or contributions you have in mind. Let's squash those bugs together! 🤖

I found some similar issues and discussions that might help you resolve the connection error when using LangChain within a VS Code extension.

Similar Issue: Issues when trying to use in a VisualStudio Code Extension
- Status: Closed
- Solution:
  1. Copy two files vocab.bpe and encoder.json from node_modules/gpt3-encoder to out.
  2. Add node-fetch to dependencies and follow these instructions ^[1].

Status: Closed

Solution:

Introduce the node-fetch dependency:
```
npm install --save @types/node-fetch
```
Import the following package in axios-fetch-adapter.js:
```
import fetch, { Headers, Request } from 'node-fetch';
```

Adjust the event-source-parse.ts method:

async function getBytes(stream, onChunk) {
stream.on('data', (chunk) => {
    onChunk(chunk);
});

stream.on('end', () => {
    onChunk(new Uint8Array(), true);
});
}

Add the following to src/extension.ts to fix ReadableStream is not defined:


import { ReadableStream } from 'web-streams-polyfill';
global.ReadableStream = ReadableStream;
``` <sup>[[2]](https://github.com/langchain-ai/langchainjs/issues/1884)</sup>.

These solutions should help you address the connection error when using LangChain within a VS Code extension. If the issue persists, you might want to ensure that your proxy settings are correctly configured and that there are no network restrictions affecting the connection.

To continue talking to Dosu, mention @dosu.

langchain-ai / langchainjs

Connection error when using langchain within VS Code Extension (Host) #6806

Checked other resources

Example Code

Error Message and Stack Trace (if applicable)

Description

System Info