Tutorials on Danto

Get a Free ChatGPT API

Thu, 11 Jul 2024 00:00:00 +0000

Below is a simple guide:

1. Register a val.town Account

Add a project.

Add the following code:

import { OpenAI } from "https://esm.town/v/std/openai";

export default async function(req: Request): Promise<Response> {
 if (req.method === "OPTIONS") {
 return new Response(null, {
 headers: {
 "Access-Control-Allow-Origin": "*",
 "Access-Control-Allow-Headers": "*",
 },
 status: 204,
 });
 }
 const openai = new OpenAI();

 try {
 var body = await req.json();
 } catch (e) {
 var search = (new URL(req.url)).searchParams;
 body = {
 "messages": [{ "role": "user", "content": search.get("q") || "hello" }],
 "temperature": 0.5,
 "presence_penalty": 0,
 "frequency_penalty": 0,
 "top_p": 1,
 stream: true,
 model: "gpt-4-turbo",
 };
 }

 const stream = await openai.chat.completions.create(body);

 if (!body.stream) {
 return new Response(JSON.stringify(body), {
 headers: {
 "Access-Control-Allow-Origin": "*",
 "Access-Control-Allow-Headers": "*",
 "Content-Type": "application/json; charset=UTF-8",
 },
 });
 }

 const { readable, writable } = new TransformStream();
 const my_stream_writer = writable.getWriter();
 var reader = stream.toReadableStream().getReader();
 var totalText = "";
 const decoder = new TextDecoder("utf-8", { stream: true });
 var encoder = new TextEncoder();
 (async () => {
 while (true) {
 const { done, value } = await reader.read();
 if (done) break;
 totalText += decoder.decode(value, { stream: true });
 var msgs = totalText.split("\n");
 totalText = msgs.pop();
 for (let i in msgs) {
 my_stream_writer.write(encoder.encode(`data: ${msgs[i]}\n\n`));
 }
 await new Promise((r) => {
 setTimeout(r, 20);
 });
 }
 my_stream_writer.close();
 })();

 return new Response(readable, {
 headers: {
 "Access-Control-Allow-Origin": "*",
 "Access-Control-Allow-Headers": "*",
 "Content-Type": "text/event-stream; charset=UTF-8",
 },
 });
}

Manually Deploy Hysteria2

Thu, 11 Jul 2024 00:00:00 +0000

After a Synology Docker app is closed, it cannot be restarted and reports the error failed to initialize logging driver database is locked.

The problem is in the log database. In fact, you only need to delete the log.db file. When the app starts again, this file will be recreated automatically. It will not affect the original data, and you do not need to reinstall the app.

Below is a simple guide:

Solve Bizhub Printer SMB Transmission Errors in Windows 11 24H2

Thu, 11 Jul 2024 00:00:00 +0000

My printer model is Bizhub C7222. After updating Windows to Windows 11 24H2, I could no longer scan files to my PC.

This is because the SMB signing requirements changed in Windows 11 24H2, so the printer settings need to be adjusted.

Synology Docker Error: failed to initialize logging driver database is locked

Thu, 11 Jul 2024 00:00:00 +0000

After a Synology Docker app is closed, it cannot be restarted and reports the error failed to initialize logging driver database is locked.

Below is a simple guide:

Install Tabby Web and Tabby Connection Gateway on Synology Docker

Fri, 21 Jun 2024 00:00:00 +0000

This guide assumes that Cloudflare Tunnel is already installed on your Synology NAS and that you can configure it. This is not a step-by-step beginner tutorial. It is mainly for my own record and may not be reproduced without permission.

Let us begin:

1. GitHub Configuration

Go to https://github.com/settings/applications/new to register a GitHub application.

Application name: anything you like.

Homepage URL: enter your access domain, for example https://tabby.mutou.men.

Authorization callback URL: set it to https://tabby.mutou.men/api/1/auth/social/complete/github/.

Discourse Forum Installation Guide

Tue, 05 Sep 2023 00:00:00 +0000

1. Configuration Requirements

1 GB of available memory works, but it is noticeably slow in testing. 2 GB of memory just meets the requirement.

2. Installation

2.1 SSH into the Cloud Server

sudo -i

Enter root mode.

2.2 Download Discourse

git clone https://github.com/discourse/discourse_docker.git /var/discourse
cd /var/discourse
chmod 700 containers

You need to use the root user for the remaining setup and bootstrap process.

2.3 Install

./discourse-setup

2.3 When Prompts Appear, Answer the Following Questions

Hostname for your Discourse? [discourse.example.com]: 
Email address for admin account(s)? [me@example.com,you@example.com]: 
SMTP server address? [smtp.example.com]: 
SMTP port? [587]: // Keep the default for Tencent email. Do not change it to 465.
SMTP user name? [user@example.com]: 
SMTP password? [pa$$word]: 
Let's Encrypt account email? (ENTER to skip) [me@example.com]: // Enter your email
Optional Maxmind License key () [xxxxxxxxxxxxxxxx]: // Default is fine

Be sure to configure the email service correctly, because logging in to the forum requires email activation.

Python Product Price Monitor

Fri, 09 Jun 2023 00:00:00 +0000

1. Features

With the help of ChatGPT, I wrote a simple price monitoring script in Python.

It supports the following features:

Get the current price
Send an alert when the price drops below a target
Send email notifications
Send a daily email to confirm that the program is still running

2. Code

import requests
from bs4 import BeautifulSoup
import smtplib
from email.mime.text import MIMEText
from email.header import Header
import time
from datetime import datetime, timedelta
import pytz

# Email account information
my_email = "yours@mutou.men"
my_password = "123456"
recipient_email = "abc@outlook.com"

# Product links and target price list. Fill in your desired price after target_price.
products = [
 {"url": "https://www.usa.canon.com/shop/p/refurbished-rf50mm-f1-8-stm", "target_price": 100, "reached_target": False, "last_price": None},
 {"url": "https://www.usa.canon.com/shop/p/refurbished-eos-r8?color=Black&type=Refurbished", "target_price": 600, "reached_target": False, "last_price": None}
]

def get_price(url):
 """Get the product price from the specified URL."""
 try:
 response = requests.get(url, timeout=10)
 response.raise_for_status()
 soup = BeautifulSoup(response.content, "html.parser")
 
 if "canon.com" in url:
 price_tag = soup.find("span", {"class": "price"})
 if price_tag:
 price_str = price_tag.text.strip().replace("$", "").replace(",", "")
 return float(price_str)
 else:
 raise ValueError("Price tag not found")
 else:
 raise ValueError("Unsupported URL format")
 
 except requests.RequestException as e:
 print(f"Error getting price for {url}: network issue - {e}")
 except Exception as e:
 print(f"Error getting price for {url}: {e}")
 return None

def send_email(subject, message):
 """Send an email notification with the specified subject and message."""
 try:
 msg = MIMEText(message, "plain", "utf-8")
 msg["Subject"] = Header(subject, "utf-8")
 msg["From"] = my_email
 msg["To"] = recipient_email
 
 server = smtplib.SMTP_SSL("smtp.exmail.qq.com", 465)
 server.login(my_email, my_password)
 server.sendmail(my_email, recipient_email, msg.as_string())
 server.quit()
 
 print("Email sent successfully.")
 except Exception as e:
 print(f"Error sending email: {e}")

def main():
 """Main function for monitoring product prices and sending notifications."""
 # Set timezone to Beijing time
 tz = pytz.timezone('Asia/Shanghai')
 
 while True:
 now = datetime.now(tz)
 current_time = now.strftime("%H:%M:%S")
 
 # Send a confirmation email every morning at 8:00
 if current_time == "08:00:00":
 subject = "Program Running Confirmation"
 message = "Your monitoring program is still running."
 send_email(subject, message)
 
 print("Starting monitoring. Current time:", now)
 
 for p in products:
 current_price = get_price(p["url"])
 if current_price is not None:
 print(f"Product {p['url']} current price is ${current_price}")
 if current_price <= p["target_price"]:
 if not p["reached_target"] or (p["last_price"] is not None and current_price > p["last_price"]):
 subject = "Product price reached target!"
 message = f"Product {p['url']} current price is ${current_price}, which has reached your target price of ${p['target_price']}."
 send_email(subject, message)
 print(f"Product {p['url']} current price is ${current_price}")
 p["reached_target"] = True
 else:
 p["reached_target"] = False # Resume monitoring after the price rises
 p["last_price"] = current_price
 
 # Print next check time and wait for 1 hour
 next_check_time = now + timedelta(hours=1)
 print(f"This monitoring cycle has ended. Next check time: {next_check_time} (1-hour interval)")
 time.sleep(3600)

if __name__ == "__main__":
 main()

3. Run the Script in the Background on a VPS

nohup python3 your_script.py > script.log 2>&1 &

4. Check Background Processes

ps aux | grep your_script.py

Synology Docker SOCKS5 Configuration Guide

Fri, 12 May 2023 00:00:00 +0000

By routing through a domestic soft router, NAS, or router, you can remotely access those devices over SOCKS5. This guide uses Synology as the example, but other soft router setups can also work.

1. Requirements

1.1 A Synology NAS with Docker support and the required network access permissions.
1.2 A public IP address. IPv4 is preferred.
1.3 A domain name connected to Synology DDNS. This is optional, but because public IP addresses may change, DDNS allows long-term access without worrying about IP changes.
1.4 A router that supports port forwarding.

Best Buy Apple Music Free 3-Month Subscription

Wed, 10 May 2023 00:00:00 +0000

The Best Buy subscription had not worked for me before.

After trying the following setup, I subscribed successfully.

1. A U.S. proxy. This is required.

2. Firefox browser. This may be the key point.

I previously used other browsers and could not complete the subscription.

Charles Schwab debit card
Outlook email

5. Shipito address

LiteCart Store Installation

Tue, 09 May 2023 00:00:00 +0000

Install a LiteCart store and add cryptocurrency payment support.

Host: Oracle AMD instance. System: Ubuntu 22.04.

1. Initial System Configuration

sudo -i
apt update
apt upgrade
apt -y install language-pack-es language-pack-fr language-pack-de language-pack-zh-hans

2. Install Required Components: PHP, MySQL, and Others

apt -y install curl nano unzip apache2 libapache2-mod-php mariadb-server php php-common php-cli php-fpm php-apcu php-curl php-dom php-gd php-imagick php-mysql php-simplexml php-mbstring php-intl php-zip php-xml

a2enmod rewrite headers proxy_fcgi setenvif
mysql_secure_installation

2.2 Configure the Database

mysql -u root - p <<END
ALTER USER 'root'@'localhost' IDENTIFIED BY '{desired_root_password_here}';
GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' WITH GRANT OPTION;
DROP USER IF EXISTS ''@'localhost';
DROP DATABASE IF EXISTS test;
FLUSH PRIVILEGES;
END

When configuring the database, make sure the root password is set correctly. Different MySQL versions may use different setup methods.

Oracle Cannot Create a New Instance

Sun, 07 May 2023 00:00:00 +0000

Oracle VPS still appears to have capacity available, but instance creation keeps failing.

The following error appears:

(400, LimitExceeded, false) You cannot create a volume because you have reached your limit. Upgrade to a paid account. (opc-request-id: dummy RequestId)

The reason is that although the instance was terminated, the storage may not have been deleted.

Go to the following URL and terminate the remaining boot volume:

https://cloud.oracle.com/block-storage/boot-volumes

Enable YubiKey Support in Vaultwarden

Sat, 26 Nov 2022 00:00:00 +0000

Two layers of protection make things even safer.

Add Variables in Synology Docker

YUBICO_CLIENT_ID

and

YUBICO_SECRET_KEY

Get the Values from This Website

Click to get the ID and key

After filling them in, you can configure YubiKey two-factor authentication in Bitwarden.

Manually Deploy NaiveProxy

Mon, 21 Nov 2022 00:00:00 +0000

0. Preparation

0.1 Open Ports on Ubuntu

iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
iptables -F

0.2 Remove the Firewall

apt-get purge netfilter-persistent
apt-get remove ufw
reboot

0.3 Add an A Record for the Domain and Point It to the Server IPv4 Address

Cloudflare users should mainly disable DNS proxying.

Ping your domain name. If it returns your server IP address, it is fine.

For example: a.xyz.com

Open-Source AdGuard VPN Setup Guide

Mon, 01 Jan 0001 00:00:00 +0000

0. Preparation

0.1 Open Ports on Ubuntu

iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
iptables -F

0.2 Remove the Firewall

apt-get purge netfilter-persistent
apt-get remove ufw
reboot

0.3 Add an A Record for the Domain and Point It to the Server IPv4 Address

Cloudflare users should mainly disable DNS proxying.

Ping your domain name. If it returns your server IP address, it is fine.

For example: a.xyz.com

Tutorials on Danto

Get a Free ChatGPT API

1. Register a val.town Account

Manually Deploy Hysteria2

Solve Bizhub Printer SMB Transmission Errors in Windows 11 24H2

Synology Docker Error: failed to initialize logging driver database is locked

Install Tabby Web and Tabby Connection Gateway on Synology Docker

1. GitHub Configuration

Discourse Forum Installation Guide

1. Configuration Requirements

2. Installation

2.1 SSH into the Cloud Server

2.2 Download Discourse

2.3 Install

2.3 When Prompts Appear, Answer the Following Questions

Python Product Price Monitor

1. Features

2. Code

3. Run the Script in the Background on a VPS

4. Check Background Processes

Synology Docker SOCKS5 Configuration Guide

1. Requirements

Best Buy Apple Music Free 3-Month Subscription

LiteCart Store Installation

1. Initial System Configuration

2. Install Required Components: PHP, MySQL, and Others

2.1 Enable Related Modules

2.2 Configure the Database

Oracle Cannot Create a New Instance

Enable YubiKey Support in Vaultwarden

Add Variables in Synology Docker

Get the Values from This Website

Manually Deploy NaiveProxy

0. Preparation

0.1 Open Ports on Ubuntu

0.2 Remove the Firewall

0.3 Add an A Record for the Domain and Point It to the Server IPv4 Address

Open-Source AdGuard VPN Setup Guide

0. Preparation

0.1 Open Ports on Ubuntu

0.2 Remove the Firewall

0.3 Add an A Record for the Domain and Point It to the Server IPv4 Address