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MIT 79 1 1,436
107.7 million (month) Aug 15 2012 2.0.1(a month ago)
1,251 5 31 BSD-2-Clause
1.2.0(a month ago) Feb 14 2011 1.5 million (month)

The "ip" library is a Node.js library that provides utility functions for working with IP addresses. It provides functions for parsing, validating, and converting IP addresses between different formats.

The "ip" library provides a simple and easy-to-use interface for working with IP addresses in Node.js. It can be useful in a variety of contexts, such as when creating a network-related application or when working with IP addresses in a web application.

requests-cache is an extension to the popular requests package and it provides easy request/response caching.

This can be very useful in web scraper development as it'll speed up all requests. requests-cache can also be used for programs that integrate web scrapers as it's an easy caching layer for the most time consuming part of web scraping - http connections.

Some features:

  • Ease of use
    Keep using the requests library you're already familiar with. Add caching with a drop-in replacement for requests.Session, or install globally to add transparent caching to all requests functions.
  • Performance
    Get sub-millisecond response times for cached responses. When they expire, you still save time with conditional requests.
  • Persistence
    Works with several storage backends including SQLite, Redis, MongoDB, and DynamoDB; or save responses as plain JSON files, YAML, and more
  • Expiration
    Use Cache-Control and other standard HTTP headers, define your own expiration schedule, keep your cache clutter-free with backends that natively support TTL, or any combination of strategies
  • Customization
    Works out of the box with zero config, but with a robust set of features for configuring and extending the library to suit your needs
  • Compatibility
    Can be combined with other popular libraries based on requests

Example Use

const ip = require('ip');

// check IP validity:
console.log(ip.isV4Format('')); // true
console.log(ip.isV4Format('2001:0db8:85a3:0000:0000:8a2e:0370:7334')); // false

// check subnets
console.log(ip.cidrSubnet('')); // { networkAddress: '', broadcastAddress: '' }
console.log(ip.not('')); // ''
import requests_cache

# to use requests_cache just replace requests.Session with requests_cache.CachedSession
session = requests_cache.CachedSession('demo_cache')
for i in range(60):

# or patch global requests

# there are various configuration options: 
session = CachedSession(
  use_cache_dir=True,                # Save files in the default user cache dir
  cache_control=True,                # Use Cache-Control response headers for expiration, if available
  expire_after=timedelta(days=1),    # Otherwise expire responses after one day
  allowable_codes=[200, 400],        # Cache 400 responses as a solemn reminder of your failures
  allowable_methods=['GET', 'POST'], # Cache whatever HTTP methods you want
  ignored_parameters=['api_key'],    # Don't match this request param, and redact if from the cache
  match_headers=['Accept-Language'], # Cache a different response per language
  stale_if_error=True,               # In case of request errors, use stale cache data if possible

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