Nap_Zap : A Search Engine Using Python

This Project is about creating a web search engine using python : This project meets the following criteria:

1. Collect HTML pages up to a maximum size.(according to given crawl-depth)
2. Make a pre-processing on these pages (eliminate 'stop words')
3. Index crawled data.
4. Submitting queries and returning the result
5. Display the result in an appropriate order of relevance.
6. A web interface!

#Requirements See requirements.txt

Structure

1. indexes: A directory of indexed web-pages by Indexer.py

   • forward_index : Forward indexing
   • inverted_index : Inverted indexing
   • url_to_id : For mapping indexed urls.

2. links : A directory of web-pages crawled by Crawler.py

   A web-pages(url) crawled and saved offline in links directory and named with base64 encoding. (To store longest urls in distinct names.)

3. static : A directory of static(logo) files like pictures.

4. templates : A directory of views (front-end files).

5. Crawler.py : Main Crawler module

   To Run Crawler.py

          $python Crawler.py --start_url "url" --max_depth depth_value
   

   url : website address that you want to crawl. depth_value: Maximum depth of crawl (integer)

   • if this will get completed successfully it will run indexer.py itself , if not then follow next to run indexer.py module.

   • By default all crawled data will be stored in 'links/' directory.

6. indexer.py : Main Indexer Module

   To Run indexer.py

          $python indexer.py --stored_docs_dir links/ --index_dir indexes
   

   • this module require to arguments
   1. stored link's directory (to generate index)
   2. index directory (to store generated index)
   • if this will get completed successfully then it will run web_ui.py itself.

7. web_ui.py : Frontend (view)

   To run web_ui.py

          $python web_ui.py
   

   • it will start at 0.0.0.0:8080

8. lang_proc.py : Language Processing Module

9. util.py : HTML parser Module

Currently 2 websites crawled

1.wikipedia.org (Crawl_Depth-1)
2.Python.org (Crawl_Depth-3)