Scrapy-Domain-Delay

Scrapy-Domain-Delay is a package that lets you set different delay for different website, using the Scrapy framework.

Install

$ pip install scrapy-domain-delay

Usage

Step 1: Extract the domain name from a full url using Python tldextract.

>>> import tldextract
>>> tldextract.extract('https://www.google.com/').domain
'google'

In this example, we would extract "google" as domain name from a full url "https://www.google.com/".

Step 2: Use the following config values in your scrapy settings:

1. Enable the AutoThrottle extension.

   AUTOTHROTTLE_ENABLED = True

2. Enable the Custom Delay Throttle by adding it to EXTENSIONS.

   EXTENSIONS = {
       'scrapy.extensions.throttle.AutoThrottle': None,
       'scrapy_domain_delay.extensions.CustomDelayThrottle': 300,
   }

3. Add {'domain': 'download delay (in seconds)'} to the DOMAIN_DELAYS.

   something like:

   # set up custom delays per domain
   DOMAIN_DELAYS = {
       'google': 1.0,
       'github': 0.5,
   }