NestJS — DataLook

Send server-side conversions from NestJS — forwarded from the request, credited to the real visitor.

Fire a server-side conversion from a NestJS controller, crediting the real browser visitor:

src/checkout.controller.ts

import { Controller, Post, Req } from '@nestjs/common';import { Request } from 'express';@Controller('checkout')export class CheckoutController {  @Post('success')  async success(@Req() req: Request) {    const forwarded = (req.headers['x-forwarded-for'] as string | undefined) ?? '';    const ip = forwarded.split(',')[0].trim() || req.ip;    await fetch('https://datalook.app/event', {      method: 'POST',      headers: {        Authorization: 'Bearer YOUR_API_KEY',        'Content-Type': 'application/json',      },      body: JSON.stringify({        event_name: 'success',        name: 'signup',        page_path: req.path,        ip,        user_agent: req.headers['user-agent'],      }),    });    return { ok: true };  }}

Note

NestJS on Express exposes req.path and req.ip; trust the proxy (app.set('trust proxy', true)) so req.ip is the real client when X-Forwarded-For is absent.

How it’s credited

This reads the visitor’s IP and User-Agent from the request and forwards them, so the conversion lands on the real visitor — device, country, and source included. No identify(), no ids, no cookie. Get an API key in the dashboard under Track it from your server; see the overview for the concepts and the webhook path.

Fire a server-side conversion from a NestJS controller, crediting the real browser visitor:

src/checkout.controller.ts

import { Controller, Post, Req } from '@nestjs/common';import { Request } from 'express';@Controller('checkout')export class CheckoutController {  @Post('success')  async success(@Req() req: Request) {    const forwarded = (req.headers['x-forwarded-for'] as string | undefined) ?? '';    const ip = forwarded.split(',')[0].trim() || req.ip;    await fetch('https://datalook.app/event', {      method: 'POST',      headers: {        Authorization: 'Bearer YOUR_API_KEY',        'Content-Type': 'application/json',      },      body: JSON.stringify({        event_name: 'success',        name: 'signup',        page_path: req.path,        ip,        user_agent: req.headers['user-agent'],      }),    });    return { ok: true };  }}

Note

NestJS on Express exposes req.path and req.ip; trust the proxy (app.set('trust proxy', true)) so req.ip is the real client when X-Forwarded-For is absent.

How it’s credited