wlvh / PSpider

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PSpider

A simple web spider frame written by Python, which needs Python3.5+

Features of PSpider

1. Support multi-threading crawling mode (using threading and requests)
2. Support distributed crawling mode (using threading, requests and redis)
3. Support using proxies for crawling (using threading and queue)
4. Define some utility functions and classes, for example: UrlFilter, get_string_num, etc
5. Fewer lines of code, easyer to read, understand and expand

Modules of PSpider

1. utilities module: define some utilities functions and classes for spider
2. instances module: define classes of fetcher, parser, saver for multi-threading spider
3. concurrent module: define WebSpiderFrame of multi-threading spider and distributed spider

Procedure of PSpider

1. procedure of multi-threading spider
   
   ①: Fetcher gets url from UrlQueue, and makes requests based on this url
   ②: Put the result of ① to HtmlQueue, and so Parser can get it
   ③: Parser gets item from HtmlQueue, and parses it to get new urls and saved items
   ④: Put the new urls to UrlQueue, and so Fetcher can get it
   ⑤: Put the saved items to ItemQueue, and so Saver can get it
   ⑥: Saver gets item from ItemQueue, and saves it to filesystem or database
   ⑦: Proxieser gets proxies from web or database and puts proxies to ProxiesQueue
   ⑧: Fetcher gets proxies from ProxiesQueue if needed, and makes requests based on this proxies

2. procedure of distributed spider
   Similar with multi-threading spider. The only difference is getting url from redis instead of queue.

Tutorials of PSpider

Installation: you'd better use the first method
（1）Copy the "spider" directory to your project directory, and import spider
（2）Install spider to your python system using python3 setup.py install

See test.py

If you have any questions or advices, you can commit "Issues" or "Pull requests"