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access. We need this to do remote LLM inference configuration.
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You can now use YaCy as a search tool within an agentic LLM framework,
i.e. using MCP clients in N8N or OpenAI AgentBuilder.
The tool address is /tools
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RAG (Retrieval Augmented Generation) is a method to combine a search
engine with a LLM (Large Language Model). When a new prompt is
submitted, a search engine injects knowledge from a search into the
content. This is done using a reverse proxy between the Chat Client and
the LLM. In this case, we used the following software:
LLM Backend - Ollama:
https://github.com/ollama/ollama
Install ollama and then load two required LLM models
with the following commands:
ollama pull phi3:3.8b
ollama pull llama3:8b
Chat Client - susi_chat:
https://github.com/susiai/susi_chat
just clone the repository and the open the file
susi_chat/chat_terminal/index.html
in your browser. This displays a chat terminal.
In this terminal, run the following command:
host http://localhost:8090
This sets the LLM backend to your YaCy peer.
Then start YaCy. It will provide the LLM endpoint to the client
while using ollama in the backend. It then injects search results
only from the local Solr index, not from the p2p network (so far).
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dropped GSA support (GSA API is still in YaCy Grid)
The 6.6.6 solr index works without migration also with 7.7.3
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this feature needs to be enabled by uncomment the url-pattern
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was replaced by UrlProxyServlet
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This assigns priorities to incoming requests. Higher priority numbers are served before lower.
(disabled by default in defaults/web.xml,
uncomment or copy entry to DATA/Settings/web.xml)
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(default was indeed a mistakenly)
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This is intended for peers who want to participate in the P2P network but don't wish to load/fill-up their index with metadata of every received search result.
The DHT transfer is not effected by this option (and will work as usual, so that a peer disabling the new store to index switch still receives and holds the metadata according to DHT rules).
Downside for the local peer is that search speed will not improve if search terms are only avail. remote or by quick hits in local index.
To be able to improve the local index a Click-Servlet option was added additionally.
If switched on, all search result links point to this servlet, which forwards the users browser (by html header) to the desired page and feeds the page to the fulltext-index.
The servlet accepts a parameter defining the action to perform (see defaults/web.xml, index, crawl, crawllinks)
The option check-boxes are placed in ConfigPortal.html
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so web.xml in defaults dir is applied first and optional DATA/SETTINGS/web.xml loaded on top.
By using this Jetty feature (default web.xml) we assure that changes to the default are applied to existing installations
and individual addition/changes are still respected.
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on proxied pages a link to exit proxy is added to top of page.
Link text can be configured in web.xml init-parameter (see default/web.xml). If missing no link is displayed.
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- use JSoup parser for selective rewrite of html body <a href= links only,
instead of regex which rewrites also header href/src links
- this improves display of pages which use header <base> tag
- tags with src attribute are taken from original location (like css) improving display and are not routed trough the indexer
Disadvantage: scripting links will drop out of proxy
Setting of the servlet through web.xml exclusivly (in case one would like to quickly switch back to the YaCyProxyServlet,
leaving the existing code of YaCyProxyServlet untouched available)
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as BASIC were pwd is transmitted near clear text (B64enc).
This has some implication as RFC 2617 requires and recommends a password hash MD5(user:realm:pwd) for DIGEST.
!!! before activating DIGEST you have to reassign all passwords !!! to allow new calculation of the hash
- default authentication is still BASIC
- configuration at this time only manually in (DATA/settings) or defaults/web.xml (<auth-method>
- the realmname is in defaults/yacy.init adminRealm=YaCy-AdminUI
- fyi: the realmname is shown on login screen
- changing the realm name invalidates all passwords - but for security you are encouraged to do so (as localhostadmin)
- implemented to support both, old hashes for BASIC and new hashes for BASIC and DIGEST
- to differentiate old / new hash the in Jetty used hash-prefix "MD5:" is used for new pwd-hashes ( "MD5:hash" )
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- this allows additional features, like servlet configuration via web.xml and many more things.
- currently the standard servlets are still configured in the code (so the supplied defaults/web.xml is not realy needed, yet),
but could be expanded
- lookup for web.xml - 1. in /DATA/SETTINGS then in /defaults
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