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feat(LangChain Nodes): Upgrade LangChain and improve proxy handling for LLM nodes (#16778)

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Eugene
2025-07-03 14:22:25 +02:00
committed by GitHub
parent c1ac8c19ef
commit cfe3699782
18 changed files with 368 additions and 299 deletions
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24
packages/@n8n/nodes-langchain/utils/httpProxyAgent.ts
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@@ -1,11 +1,19 @@
import { HttpsProxyAgent } from 'https-proxy-agent';
import proxyFromEnv from 'proxy-from-env';
import { ProxyAgent } from 'undici';
export function getHttpProxyAgent() {
const httpProxy =
process.env.HTTPS_PROXY ??
process.env.https_proxy ??
process.env.HTTP_PROXY ??
process.env.http_proxy;
/**
* Returns a ProxyAgent or undefined based on the environment variables and target URL.
* When target URL is not provided, NO_PROXY environment variable is not respected.
*/
export function getProxyAgent(targetUrl?: string) {
// There are cases where we don't know the target URL in advance (e.g. when we need to provide a proxy agent to ChatAwsBedrock)
// In such case we use a dummy URL.
// This will lead to `NO_PROXY` environment variable not being respected, but it is better than not having a proxy agent at all.
const proxyUrl = proxyFromEnv.getProxyForUrl(targetUrl ?? 'https://example.nonexistent/');
return httpProxy ? new HttpsProxyAgent(httpProxy) : undefined;
if (!proxyUrl) {
return undefined;
}
return new ProxyAgent(proxyUrl);
}