YGGo! - Distributed & Open Source Web Search Engine

Проект присвячується захисникам міста Бахмут

Written by inspiration to explore Yggdrasil ecosystem, because of last YaCy node there was discontinued. This engine also could be useful for crawling regular websites, small business resources, local networks.

The project goal - simple interface, clear architecture and lightweight server requirement.

Overview

https://github.com/YGGverse/YGGo/tree/main/media

Online instances

• http://[201:23b4:991a:634d:8359:4521:5576:15b7]/yggo
• http://94.140.114.241/yggo/

Requirements

php8^
php-dom
php-xml
php-pdo
php-curl
php-gd
php-mbstring
php-zip
php-mysql
php-memcached
memcached
sphinxsearch

Installation

• The web root dir is /public
• Deploy the database using MySQL Workbench project presented in the /database folder
• Install Sphinx Search Server
• Configuration examples presented at /config folder
• Make sure /storage/cache, /storage/tmp, /storage/snap folders are writable
• Set up the /crontab by following example

JSON API

Build third party applications / index distribution.

Could be enabled or disabled by API_ENABLED option

Address

/api.php

Search

Returns search results.

Could be enabled or disabled by API_SEARCH_ENABLED option

Request attributes

GET action=search  - required
GET query={string} - optional, search request, empty if not provided
GET type={string}  - optional, filter mime type of available or empty
GET page={int}     - optional, search results page, 1 if not provided
GET mode=SphinxQL  - optional, enable extended SphinxQL syntax

Hosts distribution

Returns hosts collected with fields provided in API_HOSTS_FIELDS option.

Could be enabled or disabled by API_HOSTS_ENABLED option

Request attributes

GET action=hosts - required

Application manifest

Returns node information for other nodes that have same CRAWL_MANIFEST_API_VERSION and CRAWL_URL_REGEXP conditions.

Could be enabled or disabled by API_MANIFEST_ENABLED option

Request attributes

GET action=manifest - required

Search textual filtering

Default constructions

word prefix:

yg*

operator OR:

hello | world

operator MAYBE:

hello MAYBE world

operator NOT:

hello -world

strict order operator (aka operator "before"):

aaa << bbb << ccc

exact form modifier:

raining =cats and =dogs

field-start and field-end modifier:

^hello world$

keyword IDF boost modifier:

boosted^1.234 boostedfieldend$^1.234

Extended syntax

https://sphinxsearch.com/docs/current.html#extended-syntax

Could be enabled with following attributes

GET m=SphinxQL

Roadmap

Basic features

• Web pages full text ranking search
  • Sphinx
• Unlimited content MIME crawling
• Flexible settings compatible with IPv4/IPv6 networks
• Extended search syntax support
• Compressed page history snaps with multi-provider storage sync
  • Local (unlimited locations)
  • Remote FTP (unlimited mirrors)
  • Privacy-oriented downloads counting, traffic controls

UI

• CSS only, JS-less interface
• Unique host ident icons
• Content genre tabs (#1)
• Page index explorer
  • Meta
  • Snaps history
  • Referrers
• Top hosts page
• Safe media preview
• Results with found matches highlight
• The time machine feature by content snaps history

API

• Index API
  • Manifest
  • Search
  • Hosts
  • Snaps
• Context advertising API

Crawler

• Auto crawl links by regular expression rules
  • Pages
  • Manifests
• Robots.txt / robots meta tags support (#2)
• Specific rules configuration for every host
• Auto stop crawling on disk quota reached
• Transactions support to prevent data loss on queue failures
• Distributed index crawling between YGGo nodes trough manifest API
• MIME Content-type settings
• Ban non-condition links to prevent extra requests
• Debug log
• Index homepages and shorter URI with higher priority
• Collect target location links on page redirect available
• Host page DOM elements collecting by CSS selectors
  • Custom settings for each host
• XML Feeds support
  • Sitemap
  • RSS
  • Atom
• Palette image index / filter
• Crawl queue balancer, that depends of CPU available

Cleaner

• Deprecated DB items auto deletion / host settings update
  • Pages
  • Snaps
    • Snap downloads
  • Manifests
  • Logs
    • Crawler
    • Cleaner
• Banned resources reset by timeout
• DB tables optimization
• Debug log

CLI

• help
• crawl
• clean
• snap
  • reindex
• hostPageDom
  • generate
  • truncate
• hostPageSnap
  • truncate
• hostPage
  • add

Other

• Administrative panel for useful index moderation
• Deployment tools
• Testing
• Documentation

Contributions

Please make a new branch of main|sqliteway tree for each patch in your fork before create PR

git checkout main
git checkout -b my-pr-branch-name

See also: SQLite tree

Donate to contributors

• @d47081: BTC | DOGE | Support our server by order Linux VPS

License

• Engine sources MIT License
• HTML parser simple_html_dom
• Home page animation by alvarotrigo
• CLI logo by patorjk.com

See also

• YGGwave ~ The Radio Catalog

Feedback

Please, feel free to share your ideas and bug reports here or use sources for your own implementations.

Have a good time!