Updated crawl4ai docs

Author: D-K-P

docs/guides/python/python-crawl4ai.mdx

@@ -22,9 +22,26 @@ This demo showcases how to use Trigger.dev with Python to build a web crawler th
 - Our [Python build extension](/config/extensions/pythonExtension) to install the dependencies and run the Python script
 - [Crawl4AI](https://github.com/unclecode/crawl4ai), an open source LLM friendly web crawler
 - A custom [Playwright extension](https://playwright.dev/) to create a headless chromium browser
+- Proxy support
+
+## Using Proxies
 
 <ScrapingWarning />
 
+Some popular proxy services are:
+
+- [Smartproxy](https://smartproxy.com/)
+- [Bright Data](https://brightdata.com/)
+- [Browserbase](https://browserbase.com/)
+- [Oxylabs](https://oxylabs.io/)
+- [ScrapingBee](https://scrapingbee.com/)
+
+Once you have a proxy service, set the following environment variables in your Trigger.dev .env file, and add them in the Trigger.dev dashboard:
+
+- `PROXY_URL`: The URL of your proxy server (e.g., `http://proxy.example.com:8080`)
+- `PROXY_USERNAME`: Username for authenticated proxies (optional)
+- `PROXY_PASSWORD`: Password for authenticated proxies (optional)
+
 ## GitHub repo
 
 <Card
@@ -113,7 +130,14 @@ export const convertUrlToMarkdown = schemaTask({
     url: z.string().url(),
   }),
   run: async (payload) => {
-    const result = await python.runScript("./src/python/crawl-url.py", [payload.url]);
+    // Pass through any proxy environment variables
+    const env = {
+      PROXY_URL: process.env.PROXY_URL,
+      PROXY_USERNAME: process.env.PROXY_USERNAME,
+      PROXY_PASSWORD: process.env.PROXY_PASSWORD,
+    };
+
+    const result = await python.runScript("./src/python/crawl-url.py", [payload.url], { env });
 
     logger.debug("convert-url-to-markdown", {
       url: payload.url,
@@ -142,10 +166,34 @@ The Python script is a simple script using Crawl4AI that takes a URL and returns
 ```python src/python/crawl-url.py
 import asyncio
 import sys
+import os
 from crawl4ai import *
+from crawl4ai.async_configs import BrowserConfig
 
 async def main(url: str):
-    async with AsyncWebCrawler() as crawler:
+    # Get proxy configuration from environment variables
+    proxy_url = os.environ.get("PROXY_URL")
+    proxy_username = os.environ.get("PROXY_USERNAME")
+    proxy_password = os.environ.get("PROXY_PASSWORD")
+
+    # Configure the proxy
+    browser_config = None
+    if proxy_url:
+        if proxy_username and proxy_password:
+            # Use authenticated proxy
+            proxy_config = {
+                "server": proxy_url,
+                "username": proxy_username,
+                "password": proxy_password
+            }
+            browser_config = BrowserConfig(proxy_config=proxy_config)
+        else:
+            # Use simple proxy
+            browser_config = BrowserConfig(proxy=proxy_url)
+    else:
+        browser_config = BrowserConfig()
+
+    async with AsyncWebCrawler(config=browser_config) as crawler:
         result = await crawler.arun(
             url=url,
         )