Icey One

落雪

Wed, 31 May 2023 23:09:29 +0800

此为我之前的小说的废案, 时间久远记不清设定了, 等回到家看一下设定也许会再做修改, 或许吧.

我七岁开始练剑, 是一众师兄弟中最刻苦的, 每天除了吃饭睡觉, 余下就是练剑. 很顺利地, 在弟子大选里我击败了所有人, 赢的毫无悬念, 那天, 也如今天一般下着雪.

直到今天, 面对这个男人, 第一次感受到无力感

她不止一次说过, 可以不去的, 一品又能如何. 可最后, 在她离开之前却只留下一句: “你什么也不懂.”

总是在最后一刻, 总是差一点, 对面的男人仍然挂着悠闲的表情, 好像与他对阵的并不是我.

怎么不懂呢, 可那时候我春风得意, 觉得自己是年轻一代的翘楚了, 将来或许会将门主的位置叶交给我, 将宗门发扬光大, 感情这种东西, 怎敢奢求.

赢了大选可授剑拜入内门, 师父传剑于我的时候, 才发现他并没有多高兴. 只是就那样看着我, 看了很久, 摆了摆手什么也没说，我那时不懂得是什么意思。为了不让师傅失望, 只能努力练习. 自那天起过了十一年, 这期间, 多少挑战, 怎样的困局, 都没有面前这个男人的窒息感.

直到今天, 我才明白, 我没有天赋, 我比别人强, 只是因为更加拼命而已. 我除了落雪什么都没有, 没有家庭, 没有感情, 木石心肠, 说的对啊.

身上的伤势越来越重, 体力不支, 只有一次机会了,

当初意气风发, 以为一品境界唾手可得, 结果终其一生, 堪堪二流, 面前这个男人, 不是我的敌人, 是我的镜子, 映照着我的平庸.

但那又如何呢, 如果能开启新时代, 结束战争的话, 我的生命, 那些牺牲的生命……

大雪纷飞, 我反而感觉到剑柄的温暖, 仿佛和软雪心意相通, 结伴十一年, 剑身震荡, 这是最后一招了.

在第三者看来, 男人好像有默契一般迎上了剑华, 然后, 剑士以更快的速度向反方向冲击, 激起了漫天大雪. 像是绽放的花朵被冰雪击碎.

软雪剑断为四节, “愧对…软雪…” 这是剑士留在人间最后的话语.

“云阳义士, 我们只是立场不同” 语毕, 男人周身挂起大风, 软雪剑钉入地面, 方圆两米的雪飘浮而起, 掩埋剑士的遗体.

“副官, 将此剑收好, 送至浣衣坊陈师傅, 以月长石重铸此剑, 名为染雪. " 断剑钉在副官面前, 剑身青光流转.

风雪依旧在肆虐.

Duolingo 初体验

Thu, 27 Apr 2023 20:33:15 +0800

Preface

Die Grenzen meiner Sprache bedeuten die Grenzen meiner Welt.

Long long ago, 大约还是大一的时候, 就想学法语, 但是因为各种原因一直没有开始, 但是这件事就像种子一直埋在心里. 直到最近看了个电影, 里面女主很漂亮, 说话想唱歌, 让我重燃对法语的渴望.

学习语言无非听说读写四项, 对比市面上众多软件, 最终选择了 Duolingo, 下面是我的一些使用体验

我的 Duolingo 账号是 Icey Swan 欢迎监督我的学习进度

1. Duolingo 初体验

久闻 Duolingo 大名, 但是一直没有用过. 最近看电影里面女主说法语很性感, 说话像唱歌, 遂开始学法语.

之所以选择 Duolingo, 是看中了它如下优势

游戏性质的关卡, 增加了学习的趣味性;
学习时间灵活, 单次学习的时间一般在 5-10 分钟, 不需要划定大块时间;
课程内容丰富, Duolingo 的课程十分充实, 从基础语法到日常用语都有覆盖, 防止空有词汇而不会日常使用;
加入社群因素, 可以和好友一起学习, 一起学习, 防止中途放弃.

截至目前, 我已经学了半个月了, 作为一个三分钟热度的人, 实在是超出我的预期. 还特地开了一年了 Super Plan 防止我半途而废.

不过说到这里, 就不得不说目前发现的缺点:

缺乏口语练习, 只使用 Duolingo 学习就会成哑巴法语;
内容深度不够, Duolingo 练习只适用于初学者, 进阶还需要其他练习;
Free Plan 限制太大, 例如每天五次机会, 广告等. 变相逼迫用户开通 Super Plan.

就我个人体验来看, Free Plan 基本闯两关就出现广告, 很影响心情, 而且刷的临时宝箱想要全对的难度还是挺大的.

2. 如何优雅地使用 Duolingo

2.1 Guidebook

不同于国内一大堆背英语软件, Duolingo 是类似于做选择题, 如果直接开做的话肯定是啥也不会, 所以建议先看一遍每个 Unit 开始的 Guidebook. 里面会大致介绍重点词汇和语法以及 tips.

2.2 学习新语言

Duolingo 的课程很简单, 例如日本語通关也不达到 N1 水平. 建议学新的, 之前完全不了解的语言, 例如法语, 西语等. 要是想考证的话, 还是放下手机, 买本书更实在.

2.3 不要在意宝箱

不要在意限时宝箱和完美通关的宝箱, 虽然我总说 Duolingo 测试简单, 但是想要完美还是很有难度的, 特别是限时挑战的宝箱, 全是 Hard 难度, 还限时, 拿不到太正常了.

2.4 使用 Web

没试过 Android, 反正 iOS 上如果你开了 Super Plan, 那么会有一段开屏动画, 虽然很短, 但是作为反感一切开屏广告的人, 所以我更喜欢用 Web , 比起移动端, Web 的优势在于可以主动复习单词. 而且如果装了 Adblock 好像不开 Super Plan 也没有广告.

最后, 我想说, 学习语言需要耐心和毅力. 不要一开始就期待学会所有的内容, 而应该循序渐进, 持之以恒地学习. 学习一门语言是一段漫长而美妙的旅程, 愿我们一起走过它的每一个阶段, 用自己的努力和汗水交换美好的未来.

3. 国区迁移

本部分仅针对 Super Plan 用户, 因为 Free plan 很可能卡在找不到客服删除手机号. ~~鉴于步骤麻烦, 如果国区账号没什么重要信息, 我更建议删除账号, 然后开个新号.~~

Duolingo 判断用户归属地是利用手机的时区和区域, 所以需要更改时区, 建议香港, 台湾, 新加坡等, 都是东八区, 没有时差, 日常使用没有问题.

一般来说, 国内的 Duolingo 账号都是用手机号+验证码注册, 没有绑定邮箱和密码. 所以基本步骤如下

绑定个人邮箱;
去官网重置密码, 会在吧临时修改密码的链接发在绑定的邮箱;
删除 +86 手机号, 具体细节请看最后;
修改手机的区域和时区;
使用代理登录 (实际测试只用登录一次就可以切换到外区).

关于第 3 点, 移除手机号需要给客服发邮件, 模板如下:

To plus_support@duolingo.com

Title:

I want to disconnect phone number form my account

Content:

Dear Duolingo Team,

I want to disconnect my phone number form my Duolingo account, info is blowing:

ID: Username

Email: example@mail.com

Phone: +86 1234567890

I have been trying do it too many, but failed. So I hope you can help deal with it immediately.

Looking forward to your reply.

大概两三天就能回复, 如果不回, 就再发一封, 直到成功为止. 判断转移是否成功很简单, 如果为外区, 则没有绑定手机号选项, 并有绑定 Google, Facebook 的选项.

How to download video?

Tue, 31 Jan 2023 13:06:34 +0800

Introduction

Often we have the need to download videos, such as for learning or collection. Here is how I download videos. I usually use Aria2 to download BT, yt-dlp to download streaming video.

The machine used in this article is Windows 11, please change it as appropriate for other systems.

1. Aria2

In theory, aria2 is the silver bullet, which can download anything, multi-protocol & cross platform, etc. But I only use it to download BT, because other have better tools.

First of all, I think it’s better to introduce what is BT, Track and P2P.

The full name of BT is BitTorrent, a protocol for P2P, which enables users to distribute and download files over internet. Where P2P means Peer-to-peer file sharing. It’s decentralized and doesn’t even require a network. Track is a special type of server that assists in the communication between peers using BT. If you want to increase the download speed, you should add the appropriate Tracker servers.

1.1 Config

Create this new files (or folder):

Download      # Path to save the downloaded file
aria2.conf    # Config
aria2.log     # Log storage, ignore it if you not needed
aria2.session # Blank file

Then your file tree should look like this:

│  aria2.conf
│  aria2.log
│  aria2.session
│  aria2c.exe
│  AUTHORS
│  ChangeLog
│  COPYING
│  index.html
│  LICENSE.OpenSSL
│  NEWS
│  README.html
│  README.mingw
│
└─Download

This is my aria2.conf, you can modify it according to your needs.

# File name：aria2.conf

## aria2 config ##

# Download path. absolute path or relative path can be used. Default: current startup location
# Absolute path: dir=Folder path
# Relative path: dir=~/Download
dir=~/Download

# Disk cache, 0 is to disable cache, default: 16M
# Enable disk cache. If SIZE is 0, the disk cache is disabled. Default: 16M
# This feature caches the downloaded data in memory, which grows to at most SIZE bytes. SIZE can include K or M. 
disk-cache=64M

# File pre-allocation method, optional: none, prealloc, trunc, falloc, default: prealloc
# Pre-allocation can effectively reduce disk fragmentation, improve disk read and write performance, and extend disk life for mechanical hard disks.
# The mechanical hard disk uses ext4 (with extended support), btrfs, xfs or NTFS (only MinGW compiled version) and other file systems are recommended to be set to falloc
# SSD does not need to be pre-allocated, it is only recommended to set it to none.
file-allocation=none

# File allocation limit size，Unit K or M，default: 5M
no-file-allocation-limit=64M

# Resume from break-point
continue=true

# Always try to resume the download, if the download cannot be resumed, the download will be terminated, default: true
always-resume=false

# URI values that do not support resumable uploads, take effect when always-resume=false.
max-resume-failure-tries=0

# Get remote server time, default:false
# I set this to true to prevent cross-time zone situations.
remote-time=true


## Session setting ##

# Path of input download file
input-file=~/aria2.session

# Path of saved session
save-session=~/aria2.session
save-session-interval=1

# The time interval to automatically save to the session, default: 60
auto-save-interval=20

# Force save, default: false
force-save=false


## Download connection settings ##

# File not found retries, default: 0 (disabled)
max-file-not-found=10

# Maximum number of attempts, 0 means unlimited, default: 5
max-tries=0

# Retry wait time (s), default: 0 (disable)
retry-wait=10

# Default(s)
connect-timeout=10

# Default(s)
timeout=10

# The maximum number of simultaneous download tasks, default: 5
max-concurrent-downloads=15

# Max connection per server, default: 1, max: 16
max-connection-per-server=16

# The maximum number of connection threads for one task, default: 5
split=64

# file minimum segment size, 1M-1024M, default 20M
min-split-size=4M
piece-length=1M

# Allow piece length change, default: false
allow-piece-length-change=true

# Minimum download speed limit, Unit K or M ，default：0 (unlimited)
lowest-speed-limit=0

# Global maximum download speed limit, can be modified at runtime, default: 0 (unlimited)
max-overall-download-limit=0

# Single task download speed limit, default: 0 (unlimited)
max-download-limit=0

# Disable IPv6, default: false
disable-ipv6=true

# GZip，default:false
http-accept-gzip=true

# URI
reuse-uri=false

# Disable netrc
no-netrc=true

# Allows overwriting, re-downloading from scratch when the control file (.aria2) doesn't exist. 
# Default: false
allow-overwrite=false

# Auto rename files
auto-file-renaming=true

# UTF-8 to Content-Disposition, default:false
content-disposition-default-utf8=true

# TLS version, option: TLSv1.1、TLSv1.2、TLSv1.3 default: TLSv1.2
#min-tls-version=TLSv1.2


## BT/PT setting ##

# BT listen port(TCP), default: 6881-6999
# Devices directly connected to internet, such as VPS, must configure firewalls and security group policies to allow this port to enter
# Devices in the internal network environment, such as NAS, in addition to firewall settings, you also need to set the external network port forwarding to this port on the router
listen-port=51413

# DHT and UDP tracker listen port(UDP), default:6881-6999
dht-listen-port=51413

# enable IPv4 DHT, PT download will disable, default:false
enable-dht=true

# enable IPv6 DHT, PT download will disable, default:false
# Enabling it in an environment without IPv6 support may cause DHT to malfunction
enable-dht6=false


# IPv4 DHT path，default：$HOME/.aria2/dht.dat
dht-file-path=/root/.aria2/dht.dat

# IPv6 DHT path，default：$HOME/.aria2/dht6.dat
dht-file-path6=/root/.aria2/dht6.dat

# IPv4 DHT
dht-entry-point=dht.transmissionbt.com:6881

# IPv6 DHT
dht-entry-point6=dht.transmissionbt.com:6881

# local peer discovery, PT download will disable, default:false
bt-enable-lpd=true


# Enable peer exchange, PT will auto disable
enable-peer-exchange=true

# BT maximum connections，0 means unlimted, default: 55
bt-max-peers=128

# BT download expected speed value (single task) Unit K or M. Default: 50K
bt-request-peer-speed-limit=10M

# Global maximum upload speed limit, default: 0 (default)
max-overall-upload-limit=2M

# Single task upload speed limit, default: 0 (unlimited)
max-upload-limit=0

# Minimum share rate. Stop seeding when the seed sharing rate reaches the value set by this option 
# 0 means always seeding, default: 1.0
# It is strongly recommended that you set this option to >= 1.0
seed-ratio=1.5

# min seed time (min)。Setting to 0 will stop seeding after the torrent download is complete.
seed-time=0

# Check file hash before seeding, default: true
bt-hash-check-seed=true

# When continuing the previous BT task, there is no need to verify again, default: false
bt-seed-unverified=false

# BT tracker server connection timeout (s). Default: 60
bt-tracker-connect-timeout=10

# BT tracker max timeout (s). default: 60
bt-tracker-timeout=10

# BT track max time interval. Default: 0 (auto)
#bt-tracker-interval=0

# BT downloads the beginning or end of the file first
bt-prioritize-piece=head=32M,tail=32M

# Save torrent uploaded via RPC, default: true
rpc-save-upload-metadata=true

# Automatically start downloading after downloading a torrent.
# option：true, false, mem, default: true
follow-torrent=true

# only download feed, default: false
pause-metadata=false

# save feed(.torrent), default: false
bt-save-metadata=true

# Bt load saved metadata(.torrent), default: false
bt-load-saved-metadata=true

# remove BT file which be unselected, default: false
bt-remove-unselected-file=true

# BT force encrypt, default: false
# It can solve the blockade of BT download by some Telecom operators, and can anti-Xunlei(反迅雷)
# If you enable it, the next option(bt-require-crypto=true, bt-min-crypto-level=arc4) don't need setting.
bt-force-encryption=true

# BT require crypto，default：false
# bt-require-crypto=true

# BT min crypto，option：plain, arc4, default: plain
# bt-min-crypto-level=arc4

# Bt detach the task of seed only, default: false
bt-detach-seed-only=true


## Client agent ##

# Customize User Agent
user-agent=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36 Edg/93.0.961.47

# BT agent
# PT download needs to keep the two parameters of user-agent and peer-agent consistent
peer-id-prefix=-TR2770-
user-agent=Transmission/2.77
peer-agent=Transmission/2.77


## RPC ##
# If you are not a professional, I do not recommend modifying these

# enable JSON-RPC/XML-RPC server, default: false
enable-rpc=true

# Accept all remote requests, default: false
rpc-allow-origin-all=true

# Accept all remote listen, default:false
rpc-listen-all=true

# RPC port, default:6800
rpc-listen-port=6800

# RPC key
rpc-secret=P3TERX

# RPC max request
rpc-max-request-size=10M

# RPC server, SSL/TLS encryption, default: false
# After enabling encryption, you must use https or wss protocol to connect. It is not recommended to enable it. 
# It is recommended to use web server reverse proxy, such as Nginx and Caddy, which are more flexible.
#rpc-secure=false

# 在 RPC certificate(.pem/.crt)
#rpc-certificate=/root/.aria2/xxx.pem

# 在 RPC private key(.key)
#rpc-private-key=/root/.aria2/xxx.key


## log setting ##

# Log file save path, ignore or set to empty to not save, default: not save
log=~/aria2.log

# log level, option: debug, info, notice, warn, error. Default: debug
#log-level=warn

# console log lever, option debug, info, notice, warn, error, default: notice
console-log-level=notice

# Quiet mode, disable log output on the console, default: false
quiet=false

#Download summary output interval (s)，0 is disable. Default：60
summary-interval=0

## BitTorrent trackers ##
# Different trackers are separated by commas(,) 
# For example bt-tracker=tracker-a,tracker-v
bt-tracker=

If you want to make more in-depth changes, I recommend you to read aria2 doc .

1.2 Tracker

Adding tracker is crucial to improve torrent download speed. Here are some trackers I use, it is very helpful for downloading anime.

1.3 Usage

For example I want to download Vivy-Flourite Eye’s Song OST, in Nyaa, I can download via BitTorrent or Magnet.

BitTorrent:

`1`	`aria2c https://nyaa.si/download/1525645.torrent`

Magnet:

aria2c 'magnet:?xt=urn:btih:ebaa26b16ba4c3b9b618019e0e988a687c28aba1&dn=Vivy-Flourite%20Eye%27s%20Song%20OST&tr=http%3A%2F%2Fnyaa.tracker.wf%3A7777%2Fannounce&tr=udp%3A%2F%2Fopen.stealth.si%3A80%2Fannounce&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=udp%3A%2F%2Fexodus.desync.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.torrent.eu.org%3A451%2Fannounce'

If you want to know more commands, run

`1`	`aria2c -h`

1.4 GUI

If you don’t want to use command line, you can also use third-party GUI, here I list some of the more well-known GUI. But I recommend using the command line, and you will understand the command line after using it a few times.

Name	Remark
AriaNg GUI	Chinese only, no need to download aria2 separately.
Aria2 for Chrome	Need to enable RPC mode
Motrix	Doesn’t support remote control.

2. yt-dlp

yt-dp is a free and open source program to download videos from YouTube and other video sites, build written by Python, so we need download Python and pip. ~~In this way, Python isn’t useless.~~

You can find all sites which support youtube-dl in here .

2.1 Download

The following default installed Python version >= 3.10, if not, download Python please.

Download youtube-dl

`1`	`pip install yt-dlp`

Enter the following code to check the installation.

`1`	`yt-dlp --version`

Download FFmpeg

`1`	`pip install ffmpeg`

Enter the following code to check the installation.

ffmpeg

If running FFmpeg fails, please go to the official website to download and add environment variables.

Download FFmpeg and add bin folder path to Environment variables path. For me, the path is D:\Download\ffmpeg-5.1.2-full_build\bin.

2.2 Usage

2.2.1 Download single video

For instance, I want install Mili - String Theocracy / “Library of Ruina” theme song .

List all format of the video (YouTube only).

`1`	`yt-dlp -F https://www.youtube.com/watch?v=nOj_A3aZxGs`

Then the following will be printed out

[youtube] Extracting URL: https://www.youtube.com/watch?v=nOj_A3aZxGs
[youtube] nOj_A3aZxGs: Downloading webpage
[youtube] nOj_A3aZxGs: Downloading android player API JSON
[info] Available formats for nOj_A3aZxGs:
ID  EXT   RESOLUTION FPS CH │   FILESIZE   TBR PROTO │ VCODEC          VBR ACODEC      ABR ASR MORE INFO
──────────────────────────────────────────────────────────────────────────────────────────────────────────────────
sb2 mhtml 48x27        1    │                  mhtml │ images                                  storyboard
sb1 mhtml 80x45        1    │                  mhtml │ images                                  storyboard
sb0 mhtml 160x90       1    │                  mhtml │ images                                  storyboard
599 m4a   audio only      2 │  658.58KiB   31k https │ audio only          mp4a.40.5   31k 22k ultralow, m4a_dash
600 webm  audio only      2 │  721.82KiB   34k https │ audio only          opus        34k 48k ultralow, webm_dash
139 m4a   audio only      2 │    1.02MiB   49k https │ audio only          mp4a.40.5   49k 22k low, m4a_dash
249 webm  audio only      2 │    1.04MiB   50k https │ audio only          opus        50k 48k low, webm_dash
250 webm  audio only      2 │    1.37MiB   66k https │ audio only          opus        66k 48k low, webm_dash
140 m4a   audio only      2 │    2.70MiB  130k https │ audio only          mp4a.40.2  130k 44k medium, m4a_dash
251 webm  audio only      2 │    2.72MiB  130k https │ audio only          opus       130k 48k medium, webm_dash
17  3gp   176x144      8  1 │  989.32KiB   46k https │ mp4v.20.3       46k mp4a.40.2    0k 22k 144p
597 mp4   256x144     15    │  636.23KiB   30k https │ avc1.4d400b     30k video only          144p, mp4_dash
598 webm  256x144     15    │  380.11KiB   18k https │ vp9             18k video only          144p, webm_dash
394 mp4   256x144     30    │  724.94KiB   34k https │ av01.0.00M.08   34k video only          144p, mp4_dash
160 mp4   256x144     30    │  393.27KiB   18k https │ avc1.4d400c     18k video only          144p, mp4_dash
278 webm  256x144     30    │  880.14KiB   41k https │ vp9             41k video only          144p, webm_dash
395 mp4   426x240     30    │    1.18MiB   57k https │ av01.0.00M.08   57k video only          240p, mp4_dash
133 mp4   426x240     30    │  594.25KiB   28k https │ avc1.4d4015     28k video only          240p, mp4_dash
242 webm  426x240     30    │    1.15MiB   55k https │ vp9             55k video only          240p, webm_dash
396 mp4   640x360     30    │    2.38MiB  114k https │ av01.0.01M.08  114k video only          360p, mp4_dash
134 mp4   640x360     30    │    1.02MiB   49k https │ avc1.4d401e     49k video only          360p, mp4_dash
18  mp4   640x360     30  2 │ ~  3.80MiB  178k https │ avc1.42001E    178k mp4a.40.2    0k 44k 360p
243 webm  640x360     30    │    2.12MiB  102k https │ vp9            102k video only          360p, webm_dash
397 mp4   854x480     30    │    4.52MiB  217k https │ av01.0.04M.08  217k video only          480p, mp4_dash
135 mp4   854x480     30    │    1.62MiB   78k https │ avc1.4d401f     78k video only          480p, mp4_dash
244 webm  854x480     30    │    3.62MiB  173k https │ vp9            173k video only          480p, webm_dash
22  mp4   1280x720    30  2 │ ~  6.27MiB  293k https │ avc1.64001F    293k mp4a.40.2    0k 44k 720p
398 mp4   1280x720    30    │   11.09MiB  532k https │ av01.0.05M.08  532k video only          720p, mp4_dash
136 mp4   1280x720    30    │    3.43MiB  165k https │ avc1.4d401f    165k video only          720p, mp4_dash
247 webm  1280x720    30    │    8.04MiB  385k https │ vp9            385k video only          720p, webm_dash
399 mp4   1920x1080   30    │   21.78MiB 1045k https │ av01.0.08M.08 1045k video only          1080p, mp4_dash
137 mp4   1920x1080   30    │   15.88MiB  761k https │ avc1.640028    761k video only          1080p, mp4_dash
248 webm  1920x1080   30    │   21.13MiB 1013k https │ vp9           1013k video only          1080p, webm_dash

We want to download 1080p video, so choose format 137, so run

`1`	`yt-dlp -f 137 https://www.youtube.com/watch?v=nOj_A3aZxGs`

OK, just wait for the download. Wait! There seems to be a problem. Why is there no sound?

So we need ffmpeg to merge video and audio, run

`1`	`yt-dlp -f 137+251 https://www.youtube.com/watch?v=nOj_A3aZxGs`

If you don’t set format, yt-dlp will download the best ability by default.

2.2.2 Download video playlist

You may say: OK, It’s easy, I know how to download videos, but what if I want to download all the videos in my collection, do I have to download them one by one?

Of course not, next we will introduce how to download videos that you liked in batches.

Download Functional Analysis - The Bright Side of Mathematics playlist with the videos being 1080p and the best audio. Save into channel_id/playlist_id directory with the video added to an archive text file:

`1`	`yt-dlp -f bv*[height=1080]+ba --download-archive videos.txt https://www.youtube.com/playlist?list=PLBh2i93oe2qsGKDOsuVVw-OCAfprrnGfr -o '%(channel_id)s/%(playlist_id)s/%(id)s.%(ext)s'`

For some websites, we need to log in to watch or download 1080 p videos, such as YouTube member or Bilibili , so we need add cookie to download.

`1`	`yt-dlp -F xxxxx --cookies-from-browser <brower name>`

For example, find all format of 7日之都大圆舞曲 , using the cookie of chrome, run

`1`	`yt-dlp -F https://www.bilibili.com/video/BV1Bi4y1V7Wf --cookies-from-browser chrome`

Then the following will be printed out

yt-dlp -F https://www.bilibili.com/video/BV1Bi4y1V7Wf --cookies-from-browser chrome
[Cookies] Extracting cookies from chrome
[Cookies] Extracted 1098 cookies from chrome
[BiliBili] Extracting URL: https://www.bilibili.com/video/BV1Bi4y1V7Wf
[BiliBili] 1Bi4y1V7Wf: Downloading webpage
[BiliBili] BV1Bi4y1V7Wf: Extracting videos in anthology
[BiliBili] 542925024: Extracting chapters
[info] Available formats for BV1Bi4y1V7Wf:
ID EXT RESOLUTION FPS │  FILESIZE   TBR PROTO │ VCODEC          VBR ACODEC      ABR
───────────────────────────────────────────────────────────────────────────────────
0  m4a audio only     │ ~ 1.07MiB   65k https │ audio only          mp4a.40.2   65k
1  m4a audio only     │ ~ 2.20MiB  133k https │ audio only          mp4a.40.2  133k
2  m4a audio only     │ ~ 4.23MiB  255k https │ audio only          mp4a.40.2  255k
3  mp4 640x360     25 │ ~ 5.03MiB  303k https │ avc1.64001E    303k video only
4  mp4 640x360     25 │ ~ 3.51MiB  212k https │ hev1.1.6.L120  212k video only
5  mp4 852x480     25 │ ~11.33MiB  684k https │ avc1.64001F    684k video only
6  mp4 852x480     25 │ ~ 7.88MiB  475k https │ hev1.1.6.L120  475k video only
7  mp4 1280x720    25 │ ~25.24MiB 1522k https │ avc1.640028   1522k video only
8  mp4 1280x720    25 │ ~17.51MiB 1056k https │ hev1.1.6.L120 1056k video only
9  mp4 1920x1080   25 │ ~37.90MiB 2286k https │ avc1.640032   2286k video only
10 mp4 1920x1080   25 │ ~26.25MiB 1584k https │ hev1.1.6.L120 1584k video only
11 mp4 1920x1080   25 │ ~77.16MiB 4655k https │ avc1.640032   4655k video only
12 mp4 1920x1080   25 │ ~46.57MiB 2809k https │ hev1.1.6.L120 2809k video only

Select 2+12, merge to 1080 p video

`1`	`yt-dlp -f 2+12 https://www.bilibili.com/video/BV1Bi4y1V7Wf --cookies-from-browser chrome`

2.2.4 External downloader

We can achieve multi-threaded download through external downloader.

Download Mili - String Theocracy / “Library of Ruina” theme song via aria2, 8 threads, 2 M pre slice.

`1`	`yt-dlp --external-downloader aria2c --downloader-args aria2c:"-x 8 -k 2M" https://www.youtube.com/watch?v=nOj_A3aZxGs`

2.2.4 Live

In YouTube, Live and video are the same, maybe we want download a private Live, for instance, recoder-man or mark it for future study.

`1`	`yt-dlp --live-from-start [url]`

But sometimes yt-dlp may fail to download, so I recommend using ytarchive .

`1`	`ytarchive -w [url] best`

The best means the best ability for the live. ytarchive will download live form start by default.

2.3 GUI

If you really don’t want to use the command line, you can use this yt-dlp gui , but it lacks a lot of features. For example, through aira2 multi-threaded download.

3. Other Tools

Here are some useful tools for download

Name	Paltform	Remark
bilidown	All	only for Bilibili , depends on youtube-dl
Downie	macOS
IDM	Windows
Jable TV Download	All	Download Jable video
NDM	Windows & macOS	Open souce IMD alternative
youtube-dl	All	Not updated for a long time

I don’t recommend using youtube-dl to download YouTube videos, the speed is very slow, always no more than 70 k/s, and not updated for a long time.

Summary

This is how I download videos, if you master these, you can download 99% of videos.

I want to tell you that streaming media is a scam, only downloaded to your hard disk, it really belongs to you, completely under your control, no ads, no censorship…

逐渐贫乏的表达

Sat, 07 Jan 2023 11:24:30 +0800

缘起

起因是我最近回到家思考为什么我的网站文章数怎么这么少, 慢慢的才发现, 不只是博客更新的问题, 是更深层次的原因. 真正的原因是我不敢表达, 害怕把自己幼稚的想法表达出来, 为此只能封闭自己以获得一点点安全感. 我不知道这是成长还是心理疾病, 但还是决定把它记录下来, 趁着我还有表达的欲望和组织语言的能力.

我的表达欲

我自认为我的表达欲望还是很强烈的, 不然的话我也不会开这个网站, 但是最近看着这一年更新文章不仅陷入沉思, 开始我以为是去年因为忙着考研没时间写, 仔细思考之后才发现, 原因没这么简单. 真正的原因是我不敢表达, 害怕把自己的幼稚的想法暴露出来. 为此只能封闭自己, 来获得一点点安全感. 这也是为什么有的文章发了几天突然消失, 因为我想要像一个长者一样娓娓道来, 兼顾有趣与深度, 可我不能.

举个例子, 我前几天写了《教师的耻辱》, 实际上直到发布, 我也认为它是一篇「好」的文章. 因为我做了充足的准备, 打算把它作为我师范生的见证. 为此我专门看了教育学的书, 结合自己的经历, 花费了小半个月才写出来. , 但是第二天睡醒再读一遍发现内容太过浅显, 没有样本支撑, 只有个人的经历, 全文都在痛骂教育制度, 却没有给出原因与解法. 只不过是个发泄自身不满的文章, 甚至不如我的师范课结课论文.

但是写了一年 Blog 了, 总算是我比较满意的, 比如数学漫谈系列, 这里的选题都是我当初学习的时候的想法/困惑, 然后把有趣的结论整理好发出来, 希望能让更多人感受数学的有趣.

同时下降的还有表达能力, 之前我写过游戏攻略, 做过自媒体, 每天和群友聊天不亦乐乎. 如果说说打字的话, 我每天应该会打三千字左右, 但是却仍感受到了表达能力在逐日降低. 巅峰时期我一个人对着屏幕说了两个小时, 但是现在写一些生活记录都感觉捉襟见肘. 例如我之前想写一个永七回忆录, 永七我已经玩了三年了, 从 20 年武汉封城到现在, 有很多记忆, 不只游戏, 还有因游戏认识的朋友. 这些故事如果两个人面对面聊天的话可以我说一整天, 但是到动手写的那一刻才知道, 我只有那些零星的情节, 却不能写出一个完整的故事. 每次看书的时候的思考的东西, 总想着改天把它写, 但是真开始写了才发现没什么好说的. 或者是想要完整表述一个观点的时候, 需要大量的时间把它分条拆解, 写好标题之后才能把他表述清楚. 而我关注的老师, 看到之后就能立即给出有条例的回答. 我之前看过一个观点「写作之难，在于将网状的思想，通过树状的句法，用线性的文字展开.」现在我才明白这句话的正确.

未来

从去年圣诞节建立我的第一个网站, 如今已经一年了; 做自媒体相关的东西也三年了, 已经过了好奇的阶段了, 把想做的系列做完之后应该就不会做了, 到时候就发一些生活记录了吧. 在后台看了一下, 大陆访客占到三成, 考虑到 Tokyo 机器, 不挂梯很慢, 所以关闭了评论区提高加载速度, ~~实际上是没人评论.~~ 重新搭了 Icey’s Alist , 亲测不挂梯下载速度也很快, 不能使用 Google 的访客可以通过 Alist 下载.

最后, 为了督促我不断进步, 我在此郑重承诺: 本文只会修改, 绝不会删除.

人格解体高清壁纸

Fri, 06 Jan 2023 14:44:16 +0800

人格解体是由喵法自然开发的 COC 跑团游戏, 目前正在 EA 内测, BUG 提交 .

跑团！骰子！克苏鲁！ Bad End！多分支！从零开始的异世界！我们是命运的囚徒，但偶尔我们也一掷乾坤，创造奇迹！

Review

目前还在 EA, 先说一些不足, 优点等成品出来后再说.

没有 COC 的精髓 – 自由感, 每次剧情选错直接 be, 要打出好结局就必须每个分支都选正确的选项, 更像是回合制 RPG.
战斗过多, 骰子检测和战斗强相关. 在前期缺少道具的时候碰到怪物保命都是问题.
官方剧情太少, 但是剧情单薄, 且每个剧情结尾必有 BOSS.
没有联机, 不能和朋友跑团真是缺少一大乐趣
由于知名度不高, 创意工坊没有优秀剧本.

但仍是一款值得期待的游戏, 希望制作组可以在 EA 时期不断改进, 做出叫好又卖座的游戏, 成为下一个 Cultist Simulator .

Wallpaper

我曾经参加过众筹, 这是对于众筹玩家的回馈, 三张壁纸和角色卡. ~~说是高清壁纸, 其实还是像素画, 像素高清?~~

下载链接: 高清壁纸 (RGJT), 角色卡 (az0r)

Linux Note

Tue, 03 Jan 2023 01:04:30 +0800

Preface

This article is used to record my often used Linux (Debian/Ubuntu) commands.

Suppose we get a server which system version is Debian 11 and only apt installed, because my Hosting Server provides such machines, ~~(because this can save storage?)~~ so we have to install packages we need.

So far, I haven’t used a Linux computer, it’s said that Arch is a good OS for personal computer. If possible, I hope to buy one after work, and experience the difference between Windows and Linux, my plan is to buy it after get the MacBook.

Having said that, the list of things I plan to buy is as follows. (hardwares only)

Phone
1. iPhone
2. Pixel
Computer
1. Arch Linux
2. MacBook Pro
PlayStation 5
NAS
Router

~~Do I really need so many computers, and can I really afford the price?~~

It’s useless to talk, let’s start.

1. Packages

The sorting of these packages has no context,(expect sudo) write wherever I think.

1.1. Sudo

`1`	`apt-get install sudo`

The sudo executes commands as the system administrator, that is, the commands run via sudo seem to be run by root.

1.2. Git

1.2.1 Install

1
2

sudo apt update
sudo apt install git

sudo apt update is a very common command, we will use it in almost all commands. If you have experience, you may encounter a command that keeps reporting errors, but you can do it when run sudo apt update.

We can verify that the installation was successful using git --version, it will print the following if the installation is successful.

1
2
3

git --version

git version 2.25.1

As of now, the latest version of git is 2.25.1.

1.2.2 Configure Git

This section is not for novices, because in normal, we don’t need to link GitHub.

Now, we have successfully installed Git, if need to login in GitHub, run the following code.

1
2

git config --global user.name "Your Name"
git config --global user.email "youremail@yourdomain.com"

1.2.3 Update

1
2

sudo apt update
sudo apt upgrade

1.3. Curl

1
2

sudo apt update
sudo apt install curl

To verify that curl is installed, type curl in a terminal.

1.4. Python

1.4.1 Install

Here we take Python 3.11 as an example, you can replace it with any version you want to install.

You can find all version in here , and replace the link of you want download.

sudo apt update
sudo apt install build-essential zlib1g-dev libncurses5-dev \
libgdbm-dev libnss3-dev libssl-dev libsqlite3-dev \
libreadline-dev libffi-dev curl libbz2-dev curl -y

curl -O https://www.python.org/ftp/python/3.11.1/Python-3.11.1.tar.xz

1.4.2 Unzip and configure

1
2
3

tar -xf Python-3.11.1.tar.xz
cd Python-3.9.15
./configure --enable-optimizations

1.4.3 Compile

run nproc to get the number of cores, you need modify the number after -j of make -j 2 to make it equal with your cores.

Here we assume 2 cores, run

1
2
3

make -j 2 
sudo make altinstall
python3.11 --version

There we replace sudo make install with sudo make altinstall, because make install will rewriting the system default python version.

1.4.4 Install Python packages

`1`	`sudo apt install python3-[package-name]`

1.5 Pip

Here we install pip3 as example, all of the commands of pip are python, and pip3 is python3

`1`	`sudo apt install python-pip`

In general, pip corresponds to Python 2.7, and pip3 corresponds to Python 3.x.

If you want update pip version, run python -m pip3 install -U pip

2. Docker

Docker is a very handy tool, i really like it It helps me do many things, for example, my Telegram bot (private) is made by Docker, if you can use Docker well, then you are a good coder.

Of course I am a junior for Docker, only some basic commands.

2.1 Install

2.1.1 Docker

Docker official provides a one-click script, which saves our tedious work.

`1`	`curl -fsSL https://get.docker.com \| bash -s docker`

If you are live in mainland China, you can use the mirror to increase the download speed, by using the --mirror parameter, for instance, using Aliyun.
1
curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun

If the user logging in to Linux isn’t root, the docker needs to join the docker group. Run this code

1
2

sudo groupadd docker # docker group
sudo usermod -aG docker $USER #add current docker to docker group

Log in to the ssh terminal again, and run docker version to test whether docker is installed. If it’s correct, it will print the following

Client: Docker Engine - Community
 Version:           20.10.22
 API version:       1.41
 Go version:        go1.18.9
 Git commit:        3a2c30b
 Built:             Thu Dec 15 22:28:08 2022
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.22
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.18.9
  Git commit:       42c8b31
  Built:            Thu Dec 15 22:25:58 2022
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.6.14
  GitCommit:        9ba4b250366a5ddde94bb7c9d1def331423aa323
 runc:
  Version:          1.1.4
  GitCommit:        v1.1.4-0-g5fd4c4d
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

If you are using docker for the first time, I recommend running docker run hello-world, this will help you get started with Docker.

2.1.2 Compose

Docker Compose is a more popular tool than Docker. One you have a Compose file, you can create and start your application with a single command: docker compose up.

Let’s start the installing Compose

`1`	curl -L https://github.com/docker/compose/releases/download/v2.14.2/docker-compose-linux-`uname -m` > ./docker-compose

unname -m means general version, automatically install the appropriate version for your machine.

Pay attention to replace 2.14.2 with the required version, you can go to Docker Compose releases to find more.

Don’t forget to grant permissions after the download is complete, and move to the correct path.

1
2

chmod +x ./docker-compose
mv ./docker-compose /usr/local/bin/docker-compose

2.2 Commands

List Docker containers

`1`	`docker ps -aq`

Stop all containers

`1`	`docker stop $(docker ps -aq)`

Delete all containers

`1`	`docker rm $(docker ps -aq)`

Delete all images

`1`	`docker rmi $(docker images -q)`

Delete specified image

`1`	`docker rmi <mage-id>`

Summary

For Linux, you need to get used to using the command code to get things done, which is different from Window and MacBook, and you need better trouble-shooting and resolution skills. If you find a problem, I recommend reading the documentation.

Of course, we all use Linux, I believe we all have the sikll.

数学漫谈 | 闭集, 紧集, 完备集

Tue, 06 Dec 2022 14:46:48 +0800

此为数学漫谈的第三篇, 本文第一部分来聊一聊泛函分析中集合的关系, 为我 Functional Analysis 第一章中关于闭性和完备性的补充. 不过按照目前的进度, 面世大约是两三年之后的事情了.

~~Hugo 不支持数学公式, 大家自行把 LaTeX 语法脑补成数学符号吧~~. 换了个主题之后, 支持 LaTeX 语法了.

1. Relation

关于闭集, 紧集, 完备集的关系, 笔记中由于限于篇幅没有展开, 这里补充一下不同空间中集合的关系.

Name	Property	Conclusion
有限维赋范线性空间	有界 + 闭 ⇔ 紧致 ⇔ 自列紧 ⇔ 列紧 + 闭	列紧 ⇔ 有界
完备赋范线性空间	紧致 ⇔ 自列紧 ⇔ 列紧 + 闭 ⇒ 有界 + 闭	列紧 ⇔ 完全有界 ⇔ 有界
赋范线性空间	紧致 ⇔ 自列紧 ⇔ 列紧 + 闭 ⇒ 有界 + 闭	列紧 ⇒ 完全有界

这里列紧即相对紧 (relative compact), 自列紧即为任意序列的极限点也在该集合.

预紧: 我们称 E 是预紧的, 如果 E 中任一序列都存在 Cauchy 子列.

2. Detail

有了这些性质, 我们接下来继续说一下不同空间的关系.

$$ R^n \subset 有限维赋范线性空间 \subset 完备赋范线性空间 \subset 赋范线性空间 \subset 度量空间 \subset 拓扑空间 $$

我们在欧氏空间中任取一个有界闭集 A, 它在连续映射下的像 f(A) 仍是有界闭集, 这是很好的性质. 但是在无穷维线性空间中, 原本紧致的空间变得松散, 因此「有界闭集」也随之松散.

考虑一维闭区间和全体实数 R 的关系, R 上的点不在紧密, 需要一致紧化才能将无穷涵盖进去.

这也是为什么我们强调连续泛函在有界闭集下的像不一定闭, 甚至不一定有界.

这不是我们想要的, 所以进入「完全有界」, 而在完备的度量空间中: 「紧 ~ 自列紧 ~ 完全有界」三者等价, 这是我们想要的, 因为紧可以近似看作有限维.

其实如果仔细观察对完全有界的定义, 发现和紧集非常类似, 只不过紧集是开集覆盖, 而完全有界是用开球覆盖.

但是这只是对完备空间而言, 如果一个空间压根就不完备, 「完全有界」就不在和「列紧」等价, 不再可以和紧集挂上钩.

现在让我们回顾一下我们学习的历程: 实轴, 欧氏空间, 无穷维赋范空间, Banach 空间.

实际上跨越就在欧氏空间到无穷维赋范空间, 也就是这里空间变得松散, 有界和紧不再等价. 至于为什么紧集能一路到最后, 是因为紧集本身就是个拓扑概念.

最后再说一下, 为什么我们对于紧性总是想要, 但又总是用别的性质代替. 这是因为紧性太特殊, 想要证明空间紧需要同时满足无穷种情况, 而不论是「有界」「完全有界」「列紧」其实都可以很轻易地看出来. 而且虽然紧性代表着完备, 放在完备空间不易证明, 放在非完备的空间不如开集, 所以对它才会有矛盾的心理

最后来一个之前看到的小故事作为结束吧. 这个小故事想写进笔记里, 但是限于英文水平不够, 没想写进去. 如果哪位读者英文水平高且有意向, 请联系我.

有界闭集、紧集就像普通人和学神，老师考他们欧式空间的内容，都能考100分，好像看不出区别。

老师加大难度，考关于无穷维的题目，有界闭集就只能考80分，于是疯狂补课进化成学霸——完全有界集，还是只能靠90，除非开挂（加上闭性）才能考100。

然后老师丧心病狂地说：这道题我不给你完备性，看你们怎么证？完全有界集哭了，不开挂只能考80了，但学神紧集还是妥妥的100。

最后老师想试试如果考一般的拓扑空间呢？然后完全有界集奔溃了：拓扑空间连 “界” 这个概念都没有我玩个屁，告辞，连夜买火车票走了。

再看紧集，也冥思苦想不得结果，这时扫地大妈过来看了一眼，两三下就把卷子做完扬长而去。

紧集大惊，跑到楼下看职工表，大妈的头像下赫然写着两个字：「开集」！

Hugo 菜单添加 icon

Tue, 22 Nov 2022 23:05:44 +0800

Introduce

Hogo 的加载速度虽然快, 但是总有一些令人不太满意的地方, 例如 icon, 有些 theme 为了加载速度, 原生菜单不自带 icons, 但是我们往往希望在菜单栏有 icons, 不但为了页面美观, 而且图标也利于访客快速了解网站架构.

由于 Hugo server 的原理是将 markdown 文档利用内置引擎渲染成 HTML, 而且为了防止更新主题把我们的更改消除, 我们选择优先级更高的根目录 (即有 config.yml 的目录层级)

1. 引入特定图标

例如我想在菜单的 search 前面添加名为 magnifying-glass 的 icon, 以 Font Awesome 为例.

1.1 引入图标

在博客的根目录 (即有 config 的层级) 创建一个 fontawesome 的文件夹, 然后把我们下载的 magnifying-glass.svg 保存到该目录.

然后在 layout/partials 目录下面创建一个 fontawesome.html 文件, 在里面黏贴

1
2
3

<span class="inline-svg" >
{{ readFile ( print "fontawesome/" . "magnifying-glass.svg" ) | safeHTML  }}
</span>

这样我们就成功引入了图标, 但是这只是一个纯静态的图标, 如果想要有鼠标悬停动画还需要接着做点工作. 我们在该文件引入 fill=currentColor , 得到下面模板

<span class="inline-svg" >
{{- $fname:=print "fontawesome/" . ".svg" -}}
{{- $path:="<path" -}}
{{- $fill:="<path fill=\"currentColor\"" -}}
{{ replace (readFile $fname) $path $fill | safeHTML }}
</span>

1.2 调整样式

默认的格式不一定对所有主题都能完美兼容, 所以我们需要调整大小, 在 header.css 修改. 下面是我的配置, 但是你可能需要一些调整.

.inline-svg {
  display: inline-block;
  height: 1.15rem;
  width: 1.15rem;
  top: 0.15rem;
  position: relative;
}

1.3 使用

大功告成, 在 config.yml 做一个这样的目录即可显示图标

 - identifier: search
   Pre: "<i class='fa fa-magnifying-glass'></i>"
   name: Search
   url: search
   weight: 1

其他地方也可添加, 如 main 或者 footer 都可以.

2. 通过 script 进入

在 header.html 黏贴如下内容

`1`	`<script defer src="/static/fontawesome/fontawesome-all.js"></script>`

在想要使用的地方输入

`1`	`<i class="fab fa-图标名"></i>`

使用脚本可以很方便的使用图标, 但是也会对网络有一定要求, 国内可能会出现加载慢甚至失败的现象. Font Awesome 也可换成 Google Font , Eva Icons , 或者 iconfont 等任何图标库.

Hugo RSS 全文输出

Sun, 13 Nov 2022 15:36:36 +0800

Introduction

昨天发现 Hugo 自带的 RSS 只输出摘要, 而且还不只输出 article, 连 page 界面也会输出, 这不符合我对 RSS 的要求. 所以自己动手进行了一些改动.

自己动手, 丰衣足食, 在读了 Hugo 的文档以后, 发现 RSS 的目录为 themes 的 /layouts/_defualt/rss.xml , 为了防止主题更新后覆盖改动, 建议将 blog/theme/layouts 下文件手动复制至 blog/layouts/ 下, 本文以此为基础.

1. 改动

打开 rss.xml 发现如下代码

{{- $pctx := . -}}
{{- if .IsHome -}}{{ $pctx = .Site }}{{- end -}}
{{- $pages := slice -}}
{{- if or $.IsHome $.IsSection -}}
{{- $pages = $pctx.RegularPages -}}
{{- else -}}
{{- $pages = $pctx.Pages -}}
{{- end -}}
{{- $limit := .Site.Config.Services.RSS.Limit -}}
{{- if ge $limit 1 -}}
{{- $pages = $pages | first $limit -}}
{{- end -}}
{{- printf "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>" | safeHTML }}
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:content="http://purl.org/rss/1.0/modules/content/">
  <channel>
    <title>{{ if eq  .Title  .Site.Title }}{{ .Site.Title }}{{ else }}{{ with .Title }}{{.}} on {{ end }}{{ .Site.Title }}{{ end }}</title>
    <link>{{ .Permalink }}</link>
    <description>Recent content {{ if ne  .Title  .Site.Title }}{{ with .Title }}in {{.}} {{ end }}{{ end }}on {{ .Site.Title }}</description>
    {{- with $.Site.Params.images }}
    <image>
      <url>{{ index . 0 | absURL }}</url>
      <link>{{ index . 0 | absURL }}</link>
    </image>
    {{- end }}
    <generator>Hugo -- gohugo.io</generator>{{ with .Site.LanguageCode }}
    <language>{{.}}</language>{{end}}{{ with .Site.Author.email }}
    <managingEditor>{{.}}{{ with $.Site.Author.name }} ({{.}}){{end}}</managingEditor>{{end}}{{ with .Site.Author.email }}
    <webMaster>{{.}}{{ with $.Site.Author.name }} ({{.}}){{end}}</webMaster>{{end}}{{ with .Site.Copyright }}
    <copyright>{{.}}</copyright>{{end}}{{ if not .Date.IsZero }}
    <lastBuildDate>{{ .Date.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</lastBuildDate>{{ end }}
    {{- with .OutputFormats.Get "RSS" -}}
    {{ printf "<atom:link href=%q rel=\"self\" type=%q />" .Permalink .MediaType | safeHTML }}
    {{- end -}}
    {{ range $pages }}
    {{- if and (ne .Layout `search`) (ne .Layout `archives`) }}
    <item>
      <title>{{ .Title }}</title>
      <link>{{ .Permalink }}</link>
      <pubDate>{{ .Date.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</pubDate>
      {{ with .Site.Author.email }}<author>{{.}}{{ with $.Site.Author.name }} ({{.}}){{end}}</author>{{end}}
      <guid>{{ .Permalink }}</guid>
      <description>{{ with .Description | html }}{{ . }}{{ else }}{{ .Summary | html }}{{ end -}}</description>
      {{- if .Site.Params.ShowFullTextinRSS }}
      <content:encoded>{{ (printf "<![CDATA[%s]]>" .Content) | safeHTML }}</content:encoded>
      {{- end }}
    </item>
    {{- end }}
    {{ end }}
  </channel>
</rss>

注意到有一段代码为

    {{ range $pages }}
    {{- if and (ne .Layout `search`) (ne .Layout `archives`) }}
    <item>
      <title>{{ .Title }}</title>
      <link>{{ .Permalink }}</link>
      <pubDate>{{ .Date.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</pubDate>
      {{ with .Site.Author.email }}<author>{{.}}{{ with $.Site.Author.name }} ({{.}}){{end}}</author>{{end}}
      <guid>{{ .Permalink }}</guid>
      <description>{{ with .Description | html }}{{ . }}{{ else }}{{ .Summary | html }}{{ end -}}</description>
      {{- if .Site.Params.ShowFullTextinRSS }}
      <content:encoded>{{ (printf "<![CDATA[%s]]>" .Content) | safeHTML }}</content:encoded>
      {{- end }}
    </item>
    {{- end }}

这段即为 RSS 全文输出的控制类, 可以发现其实 RSS 是有全文的, 只不过默认不输出, 我们将 {{ range $pages }} 改为 {{ range first 10 $pages }} 这里即为只输出最新的 10 篇 article.

接下来打开 config 文件, 在合适的地方加入 ShowFullTextinRSS: true 该命令即为输出 RSS 全文.

至此我们已完成 RSS 全文输出以及只输出最新 10 篇文章, 避免了 feed 过大的问题.

2. 结果

或者直接复制下面代码即可.

{{- $pctx := . -}}
{{- if .IsHome -}}{{ $pctx = .Site }}{{- end -}}
{{- $pages := slice -}}
{{- if or $.IsHome $.IsSection -}}
{{- $pages = $pctx.RegularPages -}}
{{- else -}}
{{- $pages = $pctx.Pages -}}
{{- end -}}
{{- $limit := .Site.Config.Services.RSS.Limit -}}
{{- if ge $limit 1 -}}
{{- $pages = $pages | first $limit -}}
{{- end -}}
{{- printf "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>" | safeHTML }}
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:content="http://purl.org/rss/1.0/modules/content/">
  <channel>
    <title>{{ if eq  .Title  .Site.Title }}{{ .Site.Title }}{{ else }}{{ with .Title }}{{.}} on {{ end }}{{ .Site.Title }}{{ end }}</title>
    <link>{{ .Permalink }}</link>
    <description>Recent content {{ if ne  .Title  .Site.Title }}{{ with .Title }}in {{.}} {{ end }}{{ end }}on {{ .Site.Title }}</description>
    {{- with $.Site.Params.images }}
    <image>
      <url>{{ index . 0 | absURL }}</url>
      <link>{{ index . 0 | absURL }}</link>
    </image>
    {{- end }}
    <generator>Hugo -- gohugo.io</generator>{{ with .Site.LanguageCode }}
    <language>{{.}}</language>{{end}}{{ with .Site.Author.email }}
    <managingEditor>{{.}}{{ with $.Site.Author.name }} ({{.}}){{end}}</managingEditor>{{end}}{{ with .Site.Author.email }}
    <webMaster>{{.}}{{ with $.Site.Author.name }} ({{.}}){{end}}</webMaster>{{end}}{{ with .Site.Copyright }}
    <copyright>{{.}}</copyright>{{end}}{{ if not .Date.IsZero }}
    <lastBuildDate>{{ .Date.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</lastBuildDate>{{ end }}
    {{- with .OutputFormats.Get "RSS" -}}
    {{ printf "<atom:link href=%q rel=\"self\" type=%q />" .Permalink .MediaType | safeHTML }}
    {{- end -}}
    {{ range first 10 $pages }}
    {{- if and (ne .Layout `search`) (ne .Layout `archives`) }}
    <item>
      <title>{{ .Title }}</title>
      <link>{{ .Permalink }}</link>
      <pubDate>{{ .Date.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</pubDate>
      {{ with .Site.Author.email }}<author>{{.}}{{ with $.Site.Author.name }} ({{.}}){{end}}</author>{{end}}
      <guid>{{ .Permalink }}</guid>
      <description>{{ with .Description | html }}{{ . }}{{ else }}{{ .Summary | html }}{{ end -}}</description>
      {{- if .Site.Params.ShowFullTextinRSS }}
      <content:encoded>{{ (printf "<![CDATA[%s]]>" .Content) | safeHTML }}</content:encoded>
      {{- end }}
    </item>
    {{- end }}
    {{ end }}
  </channel>
</rss>

Refence

Why I choose Hugo?

Mon, 10 Oct 2022 09:55:08 +0800

Preface

My first website was built by WordPress, but WordPress is not specially developed for personal blogs, there are many functions that are completely unused, which slow down the loading speed. So I want choose a new framework for blog, between Hexo and Hugo I finally chose Hugo, here is why.

	Hugo	Hexo
Language	Go	Node.js
Plugins	No	Yes
HTML Anchor	Yes	No
Development	Easy	Hard

My blog is generally pure text, with few pictures. The requirement is fast loading and easy customization, so I choose Hugo. As the slogan: “The world’s fastest framework for building websites.” Hugo just spend 1988 ms to generate a site which 1000 pages, and Hexo need 5138 ms.

But Hexo has a great advantage as the most popular framework, there are many beautiful themes, such as Typography . I fell in love with it at first sight, but since it doesn’t support sidebar, I recommended it to Xia, and now it’s used in 永七茶話會 .

1. Download & Config

1.1 Download

Download Hugo and run hugp version to check whether the installation is successful. If successful, add hugo to the environment variables.

Then run hugo new site <sitename> to crate a new site, which file tree is like

<sitename>/
├── archetypes/
│   └── default.md
├── assets/
├── content/
├── data/
├── layouts/
├── public/
├── static/
├── themes/
└── config.toml

Here I recommend you change config.toml => config.yml, Because the yml file is highly readable.

Download theme your liked in themes folder, for example: PaperMod .

1
2

cd themes
git clone https://github.com/adityatelange/hugo-PaperMod.git

1.2 Config

Refer to the exampleSite folder to modify config.yml, for PaperMod, there is not built-in(Many themes come with it), we have to check PaperMod Example or Wiki .

Although different themes have different config.yml, the following are the same

baseURL: "https://www.icey.one" # base you domain
theme: hugo-PaperMod # used theme
title: PaperMod # Site name
author: Icey Swan # author name
description: "My wish is to see you again, even across the world." site description

2. Usage & Publish

2.1 Default Front Matter

Setting default Front Matter is very important, it can save our time, so we can focus on writing. open archetypes/_default.md

---
title: "{{ replace .Name "-" " " | title }}" 
slug: "{{ replace .Name "-" " " | title }}"
date: {{ .Date }} #Crate time
lastmod: {{ .Date }} # Last modify time
author: Icey Swan #
categories: 
- cat1
-cat2
tags: 
- tag1
- tag2
description: 
weight: 1 # Enter 1 to pin this post, if blanked, it will be sorted by time
draft: false 
---

2.2 Commands

`1`	`hugo [commond] [flags]`

Here [flags] is optional, all available commands is following

completion  Generate the autocompletion script for the specified shell
config      Print the site configuration
convert     Convert your content to different formats
deploy      Deploy your site to a Cloud provider.
env         Print Hugo version and environment info
gen         A collection of several useful generators.
help        Help about any command
import      Import your site from others.
list        Listing out various types of content
mod         Various Hugo Modules helpers.
new         Create new content for your site
server      A high performance webserver
version     Print the version number of Hugo

Use hugo [command] --help for more information about a command.

Here are some commands

Crate new site

`1`	`hugo new site <sitename>`

Crate new post in content folder.

`1`	`hugo new postname.md`

Create a file at a specified location, such as posts/Tech/postname.md
1
hugo new posts/Tech/postname.md

Local preview webserver in 127.0.0.1:1313 or localhost:1313 , here -D means include content marked as draft.

`1`	`hugo server -D`

Use Hugo to render Markdown files into HTML.

hugo

hugo only crate new file in public folder, but don’t delete old. If you want delete that, run
1
hugo -F --cleanDestinationDir

2.1 Publish

All HTML files are ai public folder, upload the folder to site index on your server. If you want uploading to the hosting platforms, refer to hosting Hugo .

Here I recommend Banwagon or Vultr , if you want purchase a server.

Epilogue

From my experience, frameworks are unnecessary, the important thing is to keep writing. I know a lot of people, their website is very beautiful, but after half a year, if look at it again, you will find that he has not insisted on writing, and the website is deserted.

Icey One

落雪

Duolingo 初体验

Preface

1. Duolingo 初体验

2. 如何优雅地使用 Duolingo

2.1 Guidebook

2.2 学习新语言

2.3 不要在意宝箱

2.4 使用 Web

3. 国区迁移

How to download video?

Introduction

1. Aria2

1.1 Config

1.2 Tracker

1.3 Usage

1.4 GUI

2. yt-dlp

2.1 Download

2.2 Usage

2.2.1 Download single video

2.2.2 Download video playlist

2.2.3 Cookie

2.2.4 External downloader

2.2.4 Live

2.3 GUI

3. Other Tools

Summary

逐渐贫乏的表达

缘起

我的表达欲

未来

人格解体高清壁纸

Review

Wallpaper

Linux Note

Preface

1. Packages

1.1. Sudo

1.2. Git

1.2.1 Install

1.2.2 Configure Git

1.2.3 Update

1.3. Curl

1.4. Python

1.4.1 Install

1.4.2 Unzip and configure

1.4.3 Compile

1.4.4 Install Python packages

1.5 Pip

2. Docker

2.1 Install

2.1.1 Docker

2.1.2 Compose

2.2 Commands

Summary

数学漫谈 | 闭集, 紧集, 完备集

1. Relation

2. Detail

Hugo 菜单添加 icon

Introduce

1. 引入特定图标

1.1 引入图标

1.2 调整样式

1.3 使用

2. 通过 script 进入

Hugo RSS 全文输出

Introduction

1. 改动

2. 结果

Refence

Why I choose Hugo?

Preface

1. Download & Config

1.1 Download

1.2 Config

2. Usage & Publish

2.1 Default Front Matter

2.2 Commands