ChatWeb

Table of contents

Basic Principle
Getting Started
Example
TODO
Star History

ChatWeb can crawl any webpage or extract text from PDF, DOCX, TXT files, and generate an embedded summary. It can also answer your questions based on the content of the text. It is implemented using the chatAPI and embeddingAPI based on gpt3.5, as well as a vector database.

Basic Principle

The basic principle is similar to existing projects such as chatPDF and automated customer service AI.

Crawl web pages Extract text content Use GPT3.5’s embedding API to generate vectors for each paragraph Calculate the similarity score between each paragraph’s vector and the entire text’s vector to generate a summary Store the vector-text mapping in a vector database Generate keywords from user input Generate a vector from the keywords Use the vector database to perform a nearest neighbor search and return a list of the most similar texts Use GPT3.5’s chat API to design a prompt that answers the user’s question based on the most similar texts in the list. The idea is to extract relevant content from a large amount of text and then answer questions based on that content, which can achieve a similar effect to breaking through token limits.

An improvement was made to generate vectors based on keywords rather than the user’s question, which increases the accuracy of searching for relevant texts.

Getting Started

Manual installation:

Install Python3
Download this repository by running git clone https://github.com/SkywalkerDarren/chatWeb.git
Navigate to the directory by running cd chatWeb
Copy config.example.json to config.json
Edit config.json and set open_ai_key to your OpenAI API key
Install dependencies by running pip3 install -r requirements.txt
Start the application by running python3 main.py

Docker:

if you prefer, you can also run this project using docker:

build the container using docker-compose build (only needed once when you are not planning to contibute to this repo)
copy config.example.json to config.json and set all the needed stuff. The example config is already fine for running with docker, no need to change anything there, if you don’t have the OPEN_AI_KEY in your env variables you can set it here too, or later if you run this app.
run the container: `docker-compose up”
open the application in browser: http://localhost:7860

Set language

Edit config.json, set language to English or other language

Mode Selection

Edit config.json and set mode to console, api, or webui to choose the startup mode.
In console mode, type /help to view commands.
In api mode, an API service can be provided to the outside world. api_port and api_host can be set in config.json.
In webui mode, a web user interface service can be provided. webui_port can be set in config.json, defaulting to http://127.0.0.1:7860.

Stream Mode

Edit config.json and set use_stream to true.

Setting the Temperature

Edit config.json and set temperature to a value between 0 and 1.
The smaller the value, the more conservative and stable the response will be. The larger the value, the more daring the response may be, possibly resulting in “hallucinations.”

OpenAI Proxy Settings

Edit config.json and add open_ai_proxy for your proxy address, for example:

"open_ai_proxy": {
"http": "socks5://127.0.0.1:1081",
"https": "socks5://127.0.0.1:1081"
}

Install PostgreSQL (Optional)

Edit config.json and set use_postgres to true.
Install PostgreSQL.
- The default SQL address is postgresql://localhost:5432/mydb, or you can set it in config.json.
Install the pgvector plugin.

Compile and install the extension (support Postgres 11+).

git clone --branch v0.4.0 https://github.com/pgvector/pgvector.git
cd pgvector
make
make install # may need sudo

Then load it in the database you want to use it in

CREATE EXTENSION vector;

Install dependency with pip: pip3 install psycopg2

Example

Please enter the link to the article or the file path of the PDF/TXT/DOCX document: https://gutenberg.ca/ebooks/hemingwaye-oldmanandthesea/hemingwaye-oldmanandthesea-00-e.html
Please wait for 10 seconds until the webpage finishes loading.
The article has been retrieved, and the number of text fragments is: 663
...
=====================================
Query fragments used tokens: 7219, cost: $0.0028876
Query fragments used tokens: 7250, cost: $0.0029000000000000002
Query fragments used tokens: 7188, cost: $0.0028752
Query fragments used tokens: 7177, cost: $0.0028708
Query fragments used tokens: 2378, cost: $0.0009512000000000001
Embeddings have been created with 663 embeddings, using 31212 tokens, costing $0.0124848
The embeddings have been saved.
=====================================
Please enter your query (/help to view commands):