Baiduspider-render
Baidu •
Web Crawler
What is Baiduspider-render?
Baidu lists Baiduspider-render as a separate user-agent used when its search system fetches resources needed to render pages, including CSS, JavaScript and images. The collected string matches Baidu's published desktop example. This is distinct from the general Baiduspider entry already in the directory, but the name alone cannot prove a request came from Baidu.
User Agent String
Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
How to Control Baiduspider-render
Block Completely
To prevent Baiduspider-render from accessing your entire website, add this to your robots.txt file:
# Block Baiduspider-render
User-agent: Baiduspider-render
Disallow: /
Block Specific Directories
To restrict access to certain parts of your site while allowing others:
User-agent: Baiduspider-render
Disallow: /admin/
Disallow: /private/
Disallow: /wp-admin/
Allow: /public/
Set Crawl Delay
To slow down the crawl rate (note: not all bots respect this directive):
User-agent: Baiduspider-render
Crawl-delay: 10
How to Verify Baiduspider-render
Verification Method:
Use forward-confirmed reverse DNS for the source IP under Baidu's documented domains; the user-agent is not proof of identity.
Use forward-confirmed reverse DNS for the source IP under Baidu's documented domains; the user-agent is not proof of identity.
Learn more in the official documentation.
Detection Patterns
Multiple ways to detect Baiduspider-render in your application:
Basic Pattern
/Baiduspider\-render/i
Strict Pattern
/^Mozilla\/5\.0 \(compatible; Baiduspider\-render\/2\.0; \+http\:\/\/www\.baidu\.com\/search\/spider\.html\)$/
Flexible Pattern
/Baiduspider\-render[\s\/]?[\d\.]*?/i
Vendor Match
/.*Baidu.*Baiduspider\-render/i
Implementation Examples
// PHP Detection for Baiduspider-render
function detect_baiduspider_render() {
$user_agent = $_SERVER['HTTP_USER_AGENT'] ?? '';
$pattern = '/Baiduspider\-render/i';
if (preg_match($pattern, $user_agent)) {
// Log the detection
error_log('Baiduspider-render detected from IP: ' . $_SERVER['REMOTE_ADDR']);
// Set cache headers
header('Cache-Control: public, max-age=3600');
header('X-Robots-Tag: noarchive');
// Optional: Serve cached version
if (file_exists('cache/' . md5($_SERVER['REQUEST_URI']) . '.html')) {
readfile('cache/' . md5($_SERVER['REQUEST_URI']) . '.html');
exit;
}
return true;
}
return false;
}
# Python/Flask Detection for Baiduspider-render
import re
from flask import request, make_response
def detect_baiduspider_render():
user_agent = request.headers.get('User-Agent', '')
pattern = r'Baiduspider\-render'
if re.search(pattern, user_agent, re.IGNORECASE):
# Create response with caching
response = make_response()
response.headers['Cache-Control'] = 'public, max-age=3600'
response.headers['X-Robots-Tag'] = 'noarchive'
return True
return False
# Django Middleware
class baiduspider_renderMiddleware:
def __init__(self, get_response):
self.get_response = get_response
def __call__(self, request):
if self.detect_bot(request):
# Handle bot traffic
pass
return self.get_response(request)
// JavaScript/Node.js Detection for Baiduspider-render
const express = require('express');
const app = express();
// Middleware to detect Baiduspider-render
function detect_baiduspider_render(req, res, next) {
const userAgent = req.headers['user-agent'] || '';
const pattern = /Baiduspider\-render/i;
if (pattern.test(userAgent)) {
// Log bot detection
console.log('Baiduspider-render detected from IP:', req.ip);
// Set cache headers
res.set({
'Cache-Control': 'public, max-age=3600',
'X-Robots-Tag': 'noarchive'
});
// Mark request as bot
req.isBot = true;
req.botName = 'Baiduspider-render';
}
next();
}
app.use(detect_baiduspider_render);
# Apache .htaccess rules for Baiduspider-render
# Block completely
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Baiduspider\-render [NC]
RewriteRule .* - [F,L]
# Or redirect to a static version
RewriteCond %{HTTP_USER_AGENT} Baiduspider\-render [NC]
RewriteCond %{REQUEST_URI} !^/static/
RewriteRule ^(.*)$ /static/$1 [L]
# Or set environment variable for PHP
SetEnvIfNoCase User-Agent "Baiduspider\-render" is_bot=1
# Add cache headers for this bot
<If "%{HTTP_USER_AGENT} =~ /Baiduspider\-render/i">
Header set Cache-Control "public, max-age=3600"
Header set X-Robots-Tag "noarchive"
</If>
# Nginx configuration for Baiduspider-render
# Map user agent to variable
map $http_user_agent $is_baiduspider_render {
default 0;
~*Baiduspider\-render 1;
}
server {
# Block the bot completely
if ($is_baiduspider_render) {
return 403;
}
# Or serve cached content
location / {
if ($is_baiduspider_render) {
root /var/www/cached;
try_files $uri $uri.html $uri/index.html @backend;
}
try_files $uri @backend;
}
# Add headers for bot requests
location @backend {
if ($is_baiduspider_render) {
add_header Cache-Control "public, max-age=3600";
add_header X-Robots-Tag "noarchive";
}
proxy_pass http://backend;
}
}
Should You Block This Bot?
Recommendations based on your website type:
| Site Type | Recommendation | Reasoning |
|---|---|---|
| E-commerce | Allow | Essential for product visibility in search results |
| Blog/News | Allow | Increases content reach and discoverability |
| SaaS Application | Block | No benefit for application interfaces; preserve resources |
| Documentation | Allow | Improves documentation discoverability for developers |
| Corporate Site | Allow | Allow for public pages, block sensitive areas like intranets |
Advanced robots.txt Configurations
E-commerce Site Configuration
User-agent: Baiduspider-render
Crawl-delay: 5
Disallow: /cart/
Disallow: /checkout/
Disallow: /my-account/
Disallow: /api/
Disallow: /*?sort=
Disallow: /*?filter=
Disallow: /*&page=
Allow: /products/
Allow: /categories/
Sitemap: https://example.com/sitemap.xml
Publishing/Blog Configuration
User-agent: Baiduspider-render
Crawl-delay: 10
Disallow: /wp-admin/
Disallow: /drafts/
Disallow: /preview/
Disallow: /*?replytocom=
Allow: /
SaaS/Application Configuration
User-agent: Baiduspider-render
Disallow: /app/
Disallow: /api/
Disallow: /dashboard/
Disallow: /settings/
Allow: /
Allow: /pricing/
Allow: /features/
Allow: /docs/
Quick Reference
User Agent Match
Baiduspider-render
Robots.txt Name
Baiduspider-render
Category
search
Respects robots.txt
Yes
Copied to clipboard!