stupidloud

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.

调查目的：了解当前各基于TLS的协议方案中ClientHello的指纹独特性。理论背景见 https://arxiv.org/abs/1607.01639 。

指纹数据库：

naiveproxy v78.0.3904.70-4

（利益相关：我是这个的作者）

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,

云

IaaS指提供系统（可以自己选）或者储存空间之类的硬件，软件要自己手动装。PaaS提供语言环境和框架（可以自己选）。SaaS只能使用开发好的软件（卖软件本身，如税务会计、表格文字处理）。BaaS一般类似于非关系数据库，但各家不通用
云服务的特点：零前期成本 & 按需付费 & 弹性（类似于租，可随时多加、退掉；但没有残值）、高可用（放在机房中，不同AZ间水电隔离）

如果你想补充内容，建议优先给 free-for-dev 提PR，还能混个高星repo的contributor，没必要加到本列表里。
If you want to make improvements, I would recommend you contributing to free-for-dev rather than this list.

其他人的集合

Build FFmpeg with Intel's QSV enablement on an Intel-based validation test-bed:

Build platform: Ubuntu 18.04LTS

Ensure the platform is up to date:

sudo apt update && sudo apt -y upgrade && sudo apt -y dist-upgrade

Install baseline dependencies first (inclusive of OpenCL headers+)

Secured HLS setup with Nginx as media server

This example is part of this article.

This is an example for an HLS delivery with basic security. Nginx compiled with nginx-rtmp-module & secure-link is used as media server. Features:

Domain filtering
Referrer filtering
Embed buster

	<domain type="kvm">
	<!-- https://www.reddit.com/r/VFIO/comments/80p1q7/high_kvmqemu_cpu_utilization_when_windows_10/ -->

	<!-- https://github.com/duncanthrax/scream -->

	<!-- https://gitlab.com/YuriAlek/vfio -->
	<!-- https://github.com/PiMaker/Win10-VFIO -->
	<!-- https://gitlab.com/YuriAlek/vfio -->
	<!-- https://github.com/sk1080/nvidia-kvm-patcher -->
	<!-- https://github.com/T-vK/MobilePassThrough -->

	# TODO: replace :token, :user, and :repo
	curl -H "Authorization: token :token" \
	-H 'Accept: application/vnd.github.everest-preview+json' \
	"https://api.github.com/repos/:user/:repo/dispatches" \
	-d '{"event_type": "awesomeness", "client_payload": {"foo": "bar"}}'

	# source from phuslu
	# https://phus.lu/sysctl.conf

	# bbr
	net.core.default_qdisc=fq
	net.ipv4.tcp_congestion_control=bbr

	net.ipv4.tcp_retries2 = 8

	# 系统所有进程一共可以打开的文件数量，每个套接字也占用一个文件描述字

	#!/bin/sh

	. /lib/functions.sh
	. /lib/functions/system.sh

	kill_remaining() { # [ <signal> [ <loop> ] ]
	local loop_limit=10

	local sig="${1:-TERM}"
	local loop="${2:-0}"