frostming

# fly.toml file generated for still-snowflake-6351 on 2023-03-30T09:53:40+08:00

kill_signal = "SIGINT"
kill_timeout = 5
primary_region = "sin"
processes = []

[build]
  image = "bayedev/opencatd"

davelevine

How to Properly Cache Content Hosted on Backblaze B2

Summary

Because I use Cloudflare to manage my domains and Backblaze for backups, it only made sense to take advantage of their Bandwidth Alliance for creating my own CDN. This has been incredibly helpful for image hosting for this knowledge base, however, I recently noticed that caching wasn't working as it should.

The Problem

The overall problem started when I was adding a parking page for a domain I recently purchased. The background image was hosted on B2 and the image was supposed to be cached by Cloudflare. However, each time the page loaded, it would pull the image from the origin instead of the cache. I checked this on my knowledge base and found it was doing the same thing.

davelevine

Remove B2 /file/<bucket-name> Prefix

While the article from James Ross is solid and works very well with images, I found it fell short with any streaming video with the Bandwidth Alliance (to be fair, the article mentions nothing about videos, only images). Although the URL was being rewritten, it didn't seem to be handling video properly and even short videos were taking a long time to load.

That being said, the following seems to work perfectly...

Note: None of this code is mine. I'm basically standing on the shoulders of giants.

• Head over to https://github.com/phistrom/b2-remove-prefix.
• Follow the instructions for installing via Wrangler. If you're not familiar with Wrangler, copy the following from the index.js file:

charlesroper

How to setup a practically free CDN using Backblaze B2 and Cloudflare

⚠️ Note 2023-01-21
Some things have changed since I originally wrote this in 2016. I have updated a few minor details, and the advice is still broadly the same, but there are some new Cloudflare features you can (and should) take advantage of. In particular, pay attention to Trevor Stevens' comment here from 22 January 2022, and Matt Stenson's useful caching advice. In addition, Backblaze, with whom Cloudflare are a Bandwidth Alliance partner, have published their own guide detailing how to use Cloudflare's Web Workers to cache content from B2 private buckets. That is worth reading,

mikhailov-work

// Copyright 2019 Google LLC.
// SPDX-License-Identifier: Apache-2.0

// Author: Anton Mikhailov

// The look-up tables contains 256 entries. Each entry is a an sRGB triplet.

float turbo_srgb_floats[256][3] = {{0.18995,0.07176,0.23217},{0.19483,0.08339,0.26149},{0.19956,0.09498,0.29024},{0.20415,0.10652,0.31844},{0.20860,0.11802,0.34607},{0.21291,0.12947,0.37314},{0.21708,0.14087,0.39964},{0.22111,0.15223,0.42558},{0.22500,0.16354,0.45096},{0.22875,0.17481,0.47578},{0.23236,0.18603,0.50004},{0.23582,0.19720,0.52373},{0.23915,0.20833,0.54686},{0.24234,0.21941,0.56942},{0.24539,0.23044,0.59142},{0.24830,0.24143,0.61286},{0.25107,0.25237,0.63374},{0.25369,0.26327,0.65406},{0.25618,0.27412,0.67381},{0.25853,0.28492,0.69300},{0.26074,0.29568,0.71162},{0.26280,0.30639,0.72968},{0.26473,0.31706,0.74718},{0.26652,0.32768,0.76412},{0.26816,0.33825,0.78050},{0.26967,0.34878,0.79631},{0.27103,0.35926,0.81156},{0.27226,0.36970,0.82624},{0.27334,0.38008,0.84037},{0.27429,0.39043,0.85393},{0.27509,0.40072,0.86692},{0.2757

mikhailov-work

// Copyright 2019 Google LLC.
// SPDX-License-Identifier: Apache-2.0

// Polynomial approximation in GLSL for the Turbo colormap
// Original LUT: https://gist.github.com/mikhailov-work/ee72ba4191942acecc03fe6da94fc73f

// Authors:
//   Colormap Design: Anton Mikhailov (mikhailov@google.com)
//   GLSL Approximation: Ruofei Du (ruofei@google.com)

mikhailov-work

# Copyright 2019 Google LLC.
# SPDX-License-Identifier: Apache-2.0

# Author: Anton Mikhailov

turbo_colormap_data = [[0.18995,0.07176,0.23217],[0.19483,0.08339,0.26149],[0.19956,0.09498,0.29024],[0.20415,0.10652,0.31844],[0.20860,0.11802,0.34607],[0.21291,0.12947,0.37314],[0.21708,0.14087,0.39964],[0.22111,0.15223,0.42558],[0.22500,0.16354,0.45096],[0.22875,0.17481,0.47578],[0.23236,0.18603,0.50004],[0.23582,0.19720,0.52373],[0.23915,0.20833,0.54686],[0.24234,0.21941,0.56942],[0.24539,0.23044,0.59142],[0.24830,0.24143,0.61286],[0.25107,0.25237,0.63374],[0.25369,0.26327,0.65406],[0.25618,0.27412,0.67381],[0.25853,0.28492,0.69300],[0.26074,0.29568,0.71162],[0.26280,0.30639,0.72968],[0.26473,0.31706,0.74718],[0.26652,0.32768,0.76412],[0.26816,0.33825,0.78050],[0.26967,0.34878,0.79631],[0.27103,0.35926,0.81156],[0.27226,0.36970,0.82624],[0.27334,0.38008,0.84037],[0.27429,0.39043,0.85393],[0.27509,0.40072,0.86692],[0.27576,0.41097,0.87936],[0.27628,0.42118,0.89123],[0.27667,0.43134,0.90254],[0.27691,0.44145,0.913

zhiyuan-lin

#!/bin/bash
# Get base packages up-to-date.
apt update -y && apt dist-upgrade -y && apt autoremove -y
# Install what we needs
apt install shadowsocks-libev simple-obfs haveged curl -y
# Enable haveged for more entropy on cloud server
systemctl enable haveged.service && systemctl restart haveged.service
# Backup /etc/sysctl.conf
mv /etc/sysctl.conf /etc/sysctl.conf.orig
# Write optimized kernel parameters 

nlohmann

def remove_empty_elements(d):
    """recursively remove empty lists, empty dicts, or None elements from a dictionary"""

    def empty(x):
        return x is None or x == {} or x == []

    if not isinstance(d, (dict, list)):
        return d
    elif isinstance(d, list):
        return [v for v in (remove_empty_elements(v) for v in d) if not empty(v)]

braian87b

In experience to get a proper working multiple wan configuration using mwan3 starting from scratch you should:

Important: this works well on OpenWRT 15.05.1, on newer versions there was some breaking changes, for example, the wan ifaces have ipv6 capability and now are named with letters ("wan, wanb... , wanc" instead of "wan, wan2... wan3" so wanb6 means 2nd wan ipv6.): https://github.com/openwrt/packages/blob/master/net/mwan3/files/etc/config/mwan3

The official documentation seems to be very detailed and up to date, I recommend reading those first: https://openwrt.org/docs/guide-user/network/wan/multiwan/mwan3 but I recommend to give a look at my config file below, since my approach for policyes is very nice.

First of all: Activate conntrack, docs says that is important and neccesary to get MWAN3 work properly, and it is needed to reboot: