{"topic":{"id":13977,"title":"Shuttle CCH24 记录帖","slug":"topic","categoryId":60,"createdAt":"2024-12-05 19:21:33.242119","bumpedAt":"2025-01-05 18:57:50.776512","views":452,"postsCount":18,"highestPostNumber":18,"likeCount":40,"closed":false,"pinned":false,"pinnedGlobally":false,"pinnedAt":null,"pinnedUntil":null,"isBanner":false,"excerpt":"Shuttle CCH24 全称 Shuttle Christmas Code Hunt 2024，官方描述如下： \"Shuttlings\" (inspired by rustlings) are hands-on code challenges we made for learning the basics of backend development in Rust and using the Shuttle platform. C…","deletedAt":null,"isAnonymous":false,"category":{"id":60,"name":"日志 / 部落格","slug":"journal","color":"F7941D"},"author":{"id":1277,"username":"ucw","name":null,"avatarUrl":"/uploads/image/03/ea/03eac2176be50969b549f432e72df28bd719033042da4c6c41c3fde705e8f13a.avif"},"tags":[]},"posts":[{"id":44263,"postNumber":1,"raw":"Shuttle CCH24 全称 Shuttle Christmas Code Hunt 2024，官方描述如下：\n\n> \"Shuttlings\" (inspired by [rustlings](https://github.com/rust-lang/rustlings)) are hands-on code challenges we made for learning the basics of backend development in Rust and using the Shuttle platform.\n>\n> Christmas Code Hunt is a set of Rust challenges where you build a web server for helping Santa get prepared for Christmas. Open the tutorial challenge (-1) for a guide on how to get started! Complete all challenges by December 31 to have a chance to win prizes!\n\n大致就是圣诞节前的几天逐步开放一些 Rust challenges，全做完就能参与抽奖。笔者长期没有实践编码，技巧生疏，借着这个机会尝试重拾编码的乐趣。本帖是笔者参与该活动的记录。\n\nDay -1 的挑战主要是练习使用 Shuttle 平台和相关的 Web server 库，由于本次挑战的提交全部都是采用构建 Web server 的形式，这部分知识是必要的。Rust 的相关生态相对丰富，笔者选用 Axum 进行游玩。\n\nDay -1 的挑战也很简单，输出一些最基本的 HTTP 响应即可，基本上没有难度。\n\n接下来看 Day 2 的挑战。我实际上开始玩的时候已经是 Day 3 了，不过没有关系，只有 *2, 5, 9, 12, 16, 19, 23* 这些日子有新的挑战开放。笔者 [把这些数字扔 OEIS 查了查](https://oeis.org/search?q=2%2C5%2C9%2C12%2C16%2C19%2C23&language=english)，也没看出什么名堂，大概真的只是圣诞倒计时。\n\n![Day 2, Task 1|448x500](/uploads/image/f1/9d/f19dacbdb618001e65d51000c74dd303ba157c911a5a805f5c92288c021e671e.avif)\n\nDay 2 的挑战主要和 IP 有关，大概就是做些加加减减的小学数学。笔者随便截了张图放在上面。按照题意的话，只需要把 IP 的每个部分分别加加减减一下就好了。笔者有些好奇这种做法在实际生活中有没有用到，但实在兴趣缺缺，也就没有自行查阅资料。\n\n![Day 2, Task 3 (Bonus)|690x360](/uploads/image/02/b1/02b184ce2bc787bc3b1a4da379d119f4af1715e46564682d2985c2ee419a58f7.avif)\n\n这个挑战的每一天都有一个额外的 bonus part，不做也算任务完成，但做了能获得少许加分。笔者为了充分享受这个挑战的过程，尽量都会去试一试。Day 2 的 bonus part 主要是引入了 IPv6 的一个 XOR，做法上似乎没有什么不同，况且最难的解析与构造 IPv6 地址都有现成的库函数实现，于是很快也实现出来了。\n\n![Day 2, Code snippet|690x456](/uploads/image/22/31/2231b7574dd12d10ddcbfc1e82be502e3991bada7203b28835f2eff6b4397dc5.avif)\n\n由于编码时心态比较随便，看起来像:poop:山。\n\n最后放一张 Day 2 通关证明：\n\n![Day 2, Submissions|690x263](/uploads/image/b7/41/b7414cdc80bce6aaf0d0da30b6a996671c19f3a33fb689d77faa38f22e304aa0.avif)\n\nP.S. 发这个帖子的时候 Day 5 也已经开放并被笔者收拾掉了，目前的心情还是很愉快的。时间有些晚了，Day 5 的记录就留待下次吧。","cooked":"

Shuttle CCH24 全称 Shuttle Christmas Code Hunt 2024，官方描述如下：

\n
\"Shuttlings\" (inspired by rustlings) are hands-on code challenges we made for learning the basics of backend development in Rust and using the Shuttle platform.
\n
Christmas Code Hunt is a set of Rust challenges where you build a web server for helping Santa get prepared for Christmas. Open the tutorial challenge (-1) for a guide on how to get started! Complete all challenges by December 31 to have a chance to win prizes!
\n

大致就是圣诞节前的几天逐步开放一些 Rust challenges，全做完就能参与抽奖。笔者长期没有实践编码，技巧生疏，借着这个机会尝试重拾编码的乐趣。本帖是笔者参与该活动的记录。

Day -1 的挑战主要是练习使用 Shuttle 平台和相关的 Web server 库，由于本次挑战的提交全部都是采用构建 Web server 的形式，这部分知识是必要的。Rust 的相关生态相对丰富，笔者选用 Axum 进行游玩。

Day -1 的挑战也很简单，输出一些最基本的 HTTP 响应即可，基本上没有难度。

接下来看 Day 2 的挑战。我实际上开始玩的时候已经是 Day 3 了，不过没有关系，只有 2, 5, 9, 12, 16, 19, 23 这些日子有新的挑战开放。笔者把这些数字扔 OEIS 查了查，也没看出什么名堂，大概真的只是圣诞倒计时。

$\"Day$

Day 2 的挑战主要和 IP 有关，大概就是做些加加减减的小学数学。笔者随便截了张图放在上面。按照题意的话，只需要把 IP 的每个部分分别加加减减一下就好了。笔者有些好奇这种做法在实际生活中有没有用到，但实在兴趣缺缺，也就没有自行查阅资料。

$\"Day$

这个挑战的每一天都有一个额外的 bonus part，不做也算任务完成，但做了能获得少许加分。笔者为了充分享受这个挑战的过程，尽量都会去试一试。Day 2 的 bonus part 主要是引入了 IPv6 的一个 XOR，做法上似乎没有什么不同，况且最难的解析与构造 IPv6 地址都有现成的库函数实现，于是很快也实现出来了。

$\"Day$

由于编码时心态比较随便，看起来像💩山。

最后放一张 Day 2 通关证明：

$\"Day$

P.S. 发这个帖子的时候 Day 5 也已经开放并被笔者收拾掉了，目前的心情还是很愉快的。时间有些晚了，Day 5 的记录就留待下次吧。

\n","createdAt":"2024-12-05 19:21:33.493213","updatedAt":"2024-12-05 19:22:28.150927","replyToPostNumber":null,"replyCount":3,"likeCount":9,"wordCount":701,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"👍️","count":1,"users":[{"id":30,"username":"一只玉米人","name":"玉米🌽"}],"hasReacted":false},{"reaction":"😍️","count":1,"users":[{"id":1628,"username":"Lorange","name":"主治医师李大华"}],"hasReacted":false},{"reaction":"🤩️","count":1,"users":[{"id":5657,"username":"CR-V","name":null}],"hasReacted":false},{"reaction":"❤️","count":9,"users":[{"id":30,"username":"一只玉米人","name":"玉米🌽"},{"id":178,"username":"Hypocrisy","name":"rotartsinimdA"},{"id":200,"username":"Srotseiticar","name":null},{"id":1628,"username":"Lorange","name":"主治医师李大华"},{"id":1929,"username":"Quit","name":"Qwen"},{"id":4113,"username":"filehelper","name":"文件传输助手"},{"id":4668,"username":"IO","name":null},{"id":5151,"username":"Soyo34325","name":"Soyo34325"},{"id":6205,"username":"uika_winwing","name":null}],"hasReacted":false}],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1277,"username":"ucw","name":null,"avatarUrl":"/uploads/image/03/ea/03eac2176be50969b549f432e72df28bd719033042da4c6c41c3fde705e8f13a.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":44266,"postNumber":2,"raw":"帅的，我也做做看","cooked":"

帅的，我也做做看

\n","createdAt":"2024-12-06 02:44:03.503671","updatedAt":"2024-12-06 06:48:19.126013","replyToPostNumber":1,"replyCount":0,"likeCount":0,"wordCount":8,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":2,"publicVersion":2,"deletedAt":null,"isAnonymous":false,"user":{"id":6205,"username":"uika_winwing","name":null,"avatarUrl":"/uploads/image/76/3b/763b1e5ad8a424c4450bb26cea5ae532e7b1cd9da926ac5d99215d7123bf6002.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":44269,"postNumber":3,"raw":"![undefined|690x77](/uploads/image/54/e2/54e2e595d96a0aed38d11cc2470c27d7845e00684d40d50e421f8856203784e2.avif)\n想打了","cooked":"

$\"undefined\"$
\n想打了

\n","createdAt":"2024-12-06 03:20:30.310267","updatedAt":"2024-12-06 03:20:30.310267","replyToPostNumber":1,"replyCount":1,"likeCount":0,"wordCount":4,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":2877,"username":"Zerick","name":null,"avatarUrl":"/uploads/image/a7/a3/a7a3f86ac04b30a3177766813966fa48ce68b0e1cc009a8d274e34ab13a43ce9.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":44272,"postNumber":4,"raw":"我也想打","cooked":"

我也想打

\n","createdAt":"2024-12-06 04:45:03.209993","updatedAt":"2024-12-22 15:16:00.239133","replyToPostNumber":3,"replyCount":0,"likeCount":0,"wordCount":4,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":4668,"username":"IO","name":null,"avatarUrl":"/uploads/image/86/f2/86f267c0aaa73835a999b7cc3a7e7a701605574eda9a2c2a56f5ddbbba64d1a9.avif","admin":true,"moderator":false,"signatureRaw":"","signatureCooked":null}},{"id":44274,"postNumber":5,"raw":"Day 5 主要是做 manifest 解析，需要接收一个 POST 上来的纯文本 `Cargo.toml` 格式数据，解析出 `package.metadata.orders` 部分。\n\n![Day 5, Task 1|472x500](/uploads/image/54/89/5489f13eaaa96a183ecd3fd38604915ec7495b42c7eb9a63ec74e9e48117675e.avif)\n\n反应快的小伙伴可能读完 task 1 就开始用工具生成对应的 scheme 了，但笔者的习惯是先看完所有 tasks，以便确定设计到何种粒度。这里对于 scheme 的要求是“Cargo manifest”，遂 add 一个 `cargo-manifest` 的 dependency，这样也就不用手写 scheme 了。把 plaintext 做成一个 Manifest 对象，然后随便怎么数据操作都很 easy。\n\nbonus part 要求推广到 YAML 和 JSON 格式，这可以简单地用对应格式的 `serde` integration 来实现。`serde_yaml` 竟然已经因为作者没有需求而不维护了，几经查找决定用 `serde_yml`。这一天的挑战还是比较 straightforward 的。\n\n![Day 5, Code snippet|521x500](/uploads/image/f8/01/f80124b301535382acf3e5bee48c4c9e93d498332d2018c814a1eb5980f6a56a.avif)\n\n笔者在写代码的时候感觉到这个 scheme 里成吨的 `Option` 有一点卡手，也许是打开方式不对，没有细想。无论如何，it works. 最后还是放一张 Day 5 的通关证明：\n\n![Day 5, Submissions|690x279](/uploads/image/60/fc/60fceba1de979845ad1054d46e8f2a51be473689b37c76dc1a943bd201429b43.avif)\n\n下一个挑战应该是 9 号开放，暂且拭目以待。","cooked":"

Day 5 主要是做 manifest 解析，需要接收一个 POST 上来的纯文本 Cargo.toml 格式数据，解析出 package.metadata.orders 部分。

$\"Day$

反应快的小伙伴可能读完 task 1 就开始用工具生成对应的 scheme 了，但笔者的习惯是先看完所有 tasks，以便确定设计到何种粒度。这里对于 scheme 的要求是“Cargo manifest”，遂 add 一个 cargo-manifest 的 dependency，这样也就不用手写 scheme 了。把 plaintext 做成一个 Manifest 对象，然后随便怎么数据操作都很 easy。

bonus part 要求推广到 YAML 和 JSON 格式，这可以简单地用对应格式的 serde integration 来实现。serde_yaml 竟然已经因为作者没有需求而不维护了，几经查找决定用 serde_yml。这一天的挑战还是比较 straightforward 的。

$\"Day$

笔者在写代码的时候感觉到这个 scheme 里成吨的 Option<T> 有一点卡手，也许是打开方式不对，没有细想。无论如何，it works. 最后还是放一张 Day 5 的通关证明：

$\"Day$

下一个挑战应该是 9 号开放，暂且拭目以待。

\n","createdAt":"2024-12-06 09:01:08.903336","updatedAt":"2024-12-06 09:01:08.903336","replyToPostNumber":null,"replyCount":0,"likeCount":3,"wordCount":303,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"❤️","count":3,"users":[{"id":178,"username":"Hypocrisy","name":"rotartsinimdA"},{"id":4668,"username":"IO","name":null},{"id":5151,"username":"Soyo34325","name":"Soyo34325"}],"hasReacted":false}],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1277,"username":"ucw","name":null,"avatarUrl":"/uploads/image/03/ea/03eac2176be50969b549f432e72df28bd719033042da4c6c41c3fde705e8f13a.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":44286,"postNumber":6,"raw":"一个小插曲，笔者刚刚重新审视了 `serde_yml`，发现这玩意比较可疑。具体来讲，它干掉了 `unsafe-libyaml` 这个依赖，然后加上了一个 `libyml`。\n\n`unsafe-libyaml` 和 `serde_yaml` 的作者是同一人，即放弃维护这些 YAML 相关项目的 dtolnay；`libyml` 和 `serde_yml` 的“作者”也是同一人，是 fork 了 dtolnay 这两个项目的 sebastienrousseau。后者的 id 也太长了，笔者暂且叫他 S 先生。\n\n由于好奇，笔者 compare 了 `unsafe-libyaml` 和 `libyml`，先看看 `Cargo.toml` 都改了啥：\n\n![Safe? Stop making me laugh!|690x320](/uploads/image/6f/27/6f27800b2d12b423dafe9ae32d5a9058169db889c961dfcd421731e6fd273e05.avif)\n\n这可太厉害了。对于一个 fork 来的项目，S 先生**完全删掉了原作者**，简直是厚颜无耻；对于一个仅仅是 `c2rust` 翻译过来的东西，S 先生**大言不惭地 claim 它 \"safe and efficient\"**，简直是精神错乱。\n\nS 先生把原项目 fork 过来具体加了什么新的 features 笔者暂时不得而知，maybe just \"code refactoring and new unit tests\"。尽管如此，它在 crates.io 中 yaml 关键词下的最近下载排名已经到达了第四位，十分具有迷惑性。\n\n![Oh, great ranking.|611x500](/uploads/image/99/02/9902e80aeff6293168379f6e69e190e896362b5911804e911f1304aaed3aacae.avif)\n\n综合 S 先生的各种 overclaim，笔者做出了换回 `serde_yaml` 的决定。希望笔者今天所看到的这些 overclaim 只是因为 S 先生还没有完全完成他的大业，而不是另有所图。","cooked":"

一个小插曲，笔者刚刚重新审视了 serde_yml，发现这玩意比较可疑。具体来讲，它干掉了 unsafe-libyaml 这个依赖，然后加上了一个 libyml。

unsafe-libyaml 和 serde_yaml 的作者是同一人，即放弃维护这些 YAML 相关项目的 dtolnay；libyml 和 serde_yml 的“作者”也是同一人，是 fork 了 dtolnay 这两个项目的 sebastienrousseau。后者的 id 也太长了，笔者暂且叫他 S 先生。

由于好奇，笔者 compare 了 unsafe-libyaml 和 libyml，先看看 Cargo.toml 都改了啥：

$\"Safe?$

这可太厉害了。对于一个 fork 来的项目，S 先生完全删掉了原作者，简直是厚颜无耻；对于一个仅仅是 c2rust 翻译过来的东西，S 先生大言不惭地 claim 它 \"safe and efficient\"，简直是精神错乱。

S 先生把原项目 fork 过来具体加了什么新的 features 笔者暂时不得而知，maybe just \"code refactoring and new unit tests\"。尽管如此，它在 crates.io 中 yaml 关键词下的最近下载排名已经到达了第四位，十分具有迷惑性。

$\"Oh,$

综合 S 先生的各种 overclaim，笔者做出了换回 serde_yaml 的决定。希望笔者今天所看到的这些 overclaim 只是因为 S 先生还没有完全完成他的大业，而不是另有所图。

\n","createdAt":"2024-12-06 19:06:48.297033","updatedAt":"2024-12-06 19:06:48.297033","replyToPostNumber":null,"replyCount":0,"likeCount":6,"wordCount":354,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"😰️","count":2,"users":[{"id":200,"username":"Srotseiticar","name":null},{"id":5151,"username":"Soyo34325","name":"Soyo34325"}],"hasReacted":false},{"reaction":"❤️","count":6,"users":[{"id":178,"username":"Hypocrisy","name":"rotartsinimdA"},{"id":200,"username":"Srotseiticar","name":null},{"id":2877,"username":"Zerick","name":null},{"id":4668,"username":"IO","name":null},{"id":5151,"username":"Soyo34325","name":"Soyo34325"},{"id":6205,"username":"uika_winwing","name":null}],"hasReacted":false}],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1277,"username":"ucw","name":null,"avatarUrl":"/uploads/image/03/ea/03eac2176be50969b549f432e72df28bd719033042da4c6c41c3fde705e8f13a.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":44364,"postNumber":7,"raw":"Day 9 启动！目前耗费时长最多、调试开销最大的挑战。一个 rate limiter，缝合奇妙单位换算。先放成功截图：\n\n![Day 9, Submissions|690x281](/uploads/image/96/8c/968c2df59afe0fc7033d70aeb1cc9f25940a6bf5e69ca9c945596f0c49d4005e.avif)\n\n要求给 endpoint 加 rate limit，每 5 秒允许 5 次，所谓的“漏桶算法”，用 `leaky-bucket` 即可实现。\n\n恶心就恶心在同一个 endpoint 有多种模式，JSON 的逻辑和不带 body 的逻辑完全不一样，却要共用路由；单位换算的公式也不给，只能自己查资料，查出巨量恶心小数。\n\nbonus part 要实现一个 refill 功能，`leaky-bucket` 本身没有这个功能，手搓不太可能，加 `Mutex` 用重初始化代替草草了事。\n\n哪怕是娱乐玩法，公式也是可以给一给的，笔者真的一点也不想知道 liters, gallons, litres, pints 这些单位之间的关系。\n\n![Day 9, Code snippet|523x500](/uploads/image/0a/3c/0a3c2d0efda0c35a38528c58fe3a66b1b48b0b26f2c5a983df76b0e698a7e698.avif)","cooked":"

Day 9 启动！目前耗费时长最多、调试开销最大的挑战。一个 rate limiter，缝合奇妙单位换算。先放成功截图：

$\"Day$

要求给 endpoint 加 rate limit，每 5 秒允许 5 次，所谓的“漏桶算法”，用 leaky-bucket 即可实现。

恶心就恶心在同一个 endpoint 有多种模式，JSON 的逻辑和不带 body 的逻辑完全不一样，却要共用路由；单位换算的公式也不给，只能自己查资料，查出巨量恶心小数。

bonus part 要实现一个 refill 功能，leaky-bucket 本身没有这个功能，手搓不太可能，加 Mutex 用重初始化代替草草了事。

哪怕是娱乐玩法，公式也是可以给一给的，笔者真的一点也不想知道 liters, gallons, litres, pints 这些单位之间的关系。

$\"Day$

\n","createdAt":"2024-12-09 18:15:37.420342","updatedAt":"2024-12-09 18:15:37.420342","replyToPostNumber":null,"replyCount":2,"likeCount":3,"wordCount":234,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"wave_gif","count":1,"users":[{"id":200,"username":"Srotseiticar","name":null}],"hasReacted":false},{"reaction":"❤️","count":3,"users":[{"id":178,"username":"Hypocrisy","name":"rotartsinimdA"},{"id":200,"username":"Srotseiticar","name":null},{"id":6205,"username":"uika_winwing","name":null}],"hasReacted":false}],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1277,"username":"ucw","name":null,"avatarUrl":"/uploads/image/03/ea/03eac2176be50969b549f432e72df28bd719033042da4c6c41c3fde705e8f13a.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":44368,"postNumber":8,"raw":"牛逼","cooked":"

牛逼

\n","createdAt":"2024-12-10 03:20:05.193697","updatedAt":"2024-12-10 03:20:05.193697","replyToPostNumber":7,"replyCount":0,"likeCount":1,"wordCount":2,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"hugging_face_cat","count":1,"users":[{"id":1277,"username":"ucw","name":null}],"hasReacted":false},{"reaction":"❤️","count":1,"users":[{"id":1277,"username":"ucw","name":null}],"hasReacted":false}],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":178,"username":"Hypocrisy","name":"rotartsinimdA","avatarUrl":"/uploads/image/ce/f3/cef3773e378e161524cc7523c8a63dff0698d22802b0c1ab669894d395ee36a3.avif","admin":false,"moderator":true,"signatureRaw":null,"signatureCooked":null}},{"id":44536,"postNumber":9,"raw":"Day 12: *Connect 4* 小游戏，一张有意思的视觉图：\n\n![Day 12, Subject|500x500, 75%](/uploads/image/be/03/be034e9c3a385642676af83f993be2deea9d83fdaa3acbc2b056a024b609357c.avif)\n\n玩法就是有 4x4 的格子，每一方可以选择（未满的）某一列，在该列的顶上放上 :cookie: 或者 :glass_of_milk: 。大概像这样：\n\n![Day 12, Task|225x379](/uploads/image/59/ec/59eca3f605a9a831b8d8cee0613f6697b0f894c62f43b833a9bed010c860ad83.avif)\n\n比前一次好得多的一个挑战。一顿狂写之后解决。笔者现在已经把至今为止的 solutions 全部 push 到 GitHub 上，欢迎感兴趣的朋友们来交流：\n\nhttps://github.com/wuxianucw/shuttlings-cch24\n\n最后仍然是一如既往的通关证明，生活中需要正反馈：\n\n![Day 12, Submissions|690x264](/uploads/image/76/c5/76c57fb9f24a3bde130e16d02b2c3210285d0e7e278c1598d5714218fc4387ba.avif)","cooked":"

Day 12: Connect 4 小游戏，一张有意思的视觉图：

$\"Day$

玩法就是有 4x4 的格子，每一方可以选择（未满的）某一列，在该列的顶上放上 🍪 或者 🥛 。大概像这样：

$\"Day$

比前一次好得多的一个挑战。一顿狂写之后解决。笔者现在已经把至今为止的 solutions 全部 push 到 GitHub 上，欢迎感兴趣的朋友们来交流：

\n\n

最后仍然是一如既往的通关证明，生活中需要正反馈：

$\"Day$

\n","createdAt":"2024-12-12 19:14:45.561659","updatedAt":"2024-12-12 19:15:18.475609","replyToPostNumber":null,"replyCount":2,"likeCount":6,"wordCount":153,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"wave_gif","count":2,"users":[{"id":30,"username":"一只玉米人","name":"玉米🌽"},{"id":200,"username":"Srotseiticar","name":null}],"hasReacted":false},{"reaction":"❤️","count":6,"users":[{"id":30,"username":"一只玉米人","name":"玉米🌽"},{"id":200,"username":"Srotseiticar","name":null},{"id":1411,"username":"lwe","name":null},{"id":1929,"username":"Quit","name":"Qwen"},{"id":4668,"username":"IO","name":null},{"id":6205,"username":"uika_winwing","name":null}],"hasReacted":false}],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1277,"username":"ucw","name":null,"avatarUrl":"/uploads/image/03/ea/03eac2176be50969b549f432e72df28bd719033042da4c6c41c3fde705e8f13a.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":44538,"postNumber":10,"raw":"我小学时候玩过类似的玩具，可能是 6 $\\times$ 6 的或者 8 $\\times$ 8 的 :grinning_cat_with_closed_eyes: 规则好像是四子棋（五子棋的简略版）不知道你的这个游戏是否有斜向获胜这个赢法","cooked":"

我小学时候玩过类似的玩具，可能是 6 $\\times$ 6 的或者 8 $\\times$ 8 的 😸 规则好像是四子棋（五子棋的简略版）不知道你的这个游戏是否有斜向获胜这个赢法

\n","createdAt":"2024-12-13 01:36:25.405808","updatedAt":"2024-12-13 01:37:12.816665","replyToPostNumber":9,"replyCount":1,"likeCount":1,"wordCount":64,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"❤️","count":1,"users":[{"id":4113,"username":"filehelper","name":"文件传输助手"}],"hasReacted":false}],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":30,"username":"一只玉米人","name":"玉米🌽","avatarUrl":"/uploads/blob/14/96/14961aeaa46ccbb75a61eec0c27b26e74fb5d1c00ccdcbbe898ca9ea37087dd6.svg","admin":false,"moderator":true,"signatureRaw":"*年月擦身过，暂且问，会更好吗？*","signatureCooked":"

年月擦身过，暂且问，会更好吗？

\n"}},{"id":44540,"postNumber":11,"raw":"[quote=\"ucw, post:9, topic:13977\"]\n一张有意思的视觉图\n[/quote]\n\n确实好有意思，感觉像是早八套餐，上面是奶糖，下面是小面包，迟到了就抓起一包拿到教室吃……","cooked":"

\n\t\t\t\t\t\t\t

\n\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\t\t\t\tucw:\n\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\t\t

\n
一张有意思的视觉图
\n

\n\t\t\t\t\t\t

确实好有意思，感觉像是早八套餐，上面是奶糖，下面是小面包，迟到了就抓起一包拿到教室吃……

\n","createdAt":"2024-12-13 02:44:46.910854","updatedAt":"2024-12-13 02:44:46.910854","replyToPostNumber":9,"replyCount":0,"likeCount":2,"wordCount":56,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"👍️","count":1,"users":[{"id":1277,"username":"ucw","name":null}],"hasReacted":false},{"reaction":"hugging_face_exploding_head","count":1,"users":[{"id":1929,"username":"Quit","name":"Qwen"}],"hasReacted":false},{"reaction":"❤️","count":2,"users":[{"id":1277,"username":"ucw","name":null},{"id":1929,"username":"Quit","name":"Qwen"}],"hasReacted":false}],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":5905,"username":"PipaQinse233","name":"PipaQinse233","avatarUrl":"/uploads/image/f7/1b/f71bbda87a32de08df517fe7ee4a14e3f63bfd1b2105d3ddb8ba1f4c2eaa1c29.avif","admin":false,"moderator":false,"signatureRaw":"[right]——發自我的手機[/right]","signatureCooked":"

——發自我的手機

"}},{"id":44546,"postNumber":12,"raw":"是有的，你说的游戏我也玩过 :hugging_face_cat:\n\n![diagonal|183x157](/uploads/image/e1/ce/e1ce2fccb7e91acbb60319d6b375d8c28b99f82325a487bdcd48e8e166953aa6.avif)","cooked":"

是有的，你说的游戏我也玩过 $\":hugging_face_cat:\"$

$\"diagonal\"$

\n","createdAt":"2024-12-13 08:18:35.766174","updatedAt":"2024-12-13 08:21:02.781574","replyToPostNumber":10,"replyCount":0,"likeCount":1,"wordCount":15,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"wave_gif","count":1,"users":[{"id":30,"username":"一只玉米人","name":"玉米🌽"}],"hasReacted":false},{"reaction":"❤️","count":1,"users":[{"id":30,"username":"一只玉米人","name":"玉米🌽"}],"hasReacted":false}],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1277,"username":"ucw","name":null,"avatarUrl":"/uploads/image/03/ea/03eac2176be50969b549f432e72df28bd719033042da4c6c41c3fde705e8f13a.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":44726,"postNumber":13,"raw":"Day 16 太累了，且有别的优先级更高的事，所以没有当天立即开。现在补上。\n\n这次的 Tasks 出奇简单，就是 JWT，纯送。笔者作为万年互联网搬砖调包侠，做这种既不恶心人又没有很多流程的题就是随便写写的事。\n\n今天写代码有 buff 加成：室友剩了小半瓶二锅头，可以先喝再写甚至边喝边写，如有神助。如图。\n\n![Day 16, Buff|375x500](/uploads/image/a7/bd/a7bd2a45a94f3ed2aafbd25ff52e5d3ddc5d336585c65b3b6736b6ff833c331d.avif)\n\n看瓶子上写的 42%vol，感觉已经不低了。写代码而言的话，笔者更喜欢配不超过 15%vol 的酒，能够喝得相对频繁一点也不上头。\n\nDay 16 挑战的 bouns task 给了 200 分，比前几天的 75 更上了一个档次，实际上难度也确实提高了。题目没有把所有的细节说清楚，而是需要一定的探索。给了一个额外的 PEM 文件作为解码 JWT 的 key，但是没有具体说使用什么算法。当然这也构不成什么阻碍，一通调试也就搞定了。\n\n最后仍然是通关证明：\n\n![Day 16, Submissions|690x253](/uploads/image/b4/7f/b47ff4e629c3ca5e607b93a6b30c2de0ff4add5b8fd341ee2068ce2a754ab55c.avif)","cooked":"

Day 16 太累了，且有别的优先级更高的事，所以没有当天立即开。现在补上。

这次的 Tasks 出奇简单，就是 JWT，纯送。笔者作为万年互联网搬砖调包侠，做这种既不恶心人又没有很多流程的题就是随便写写的事。

今天写代码有 buff 加成：室友剩了小半瓶二锅头，可以先喝再写甚至边喝边写，如有神助。如图。

$\"Day$

看瓶子上写的 42%vol，感觉已经不低了。写代码而言的话，笔者更喜欢配不超过 15%vol 的酒，能够喝得相对频繁一点也不上头。

Day 16 挑战的 bouns task 给了 200 分，比前几天的 75 更上了一个档次，实际上难度也确实提高了。题目没有把所有的细节说清楚，而是需要一定的探索。给了一个额外的 PEM 文件作为解码 JWT 的 key，但是没有具体说使用什么算法。当然这也构不成什么阻碍，一通调试也就搞定了。

最后仍然是通关证明：

$\"Day$

\n","createdAt":"2024-12-17 19:21:21.459203","updatedAt":"2024-12-17 19:21:21.459203","replyToPostNumber":null,"replyCount":1,"likeCount":4,"wordCount":313,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"💯️","count":1,"users":[{"id":5151,"username":"Soyo34325","name":"Soyo34325"}],"hasReacted":false},{"reaction":"❤️","count":4,"users":[{"id":4668,"username":"IO","name":null},{"id":5151,"username":"Soyo34325","name":"Soyo34325"},{"id":5905,"username":"PipaQinse233","name":"PipaQinse233"},{"id":6205,"username":"uika_winwing","name":null}],"hasReacted":false}],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1277,"username":"ucw","name":null,"avatarUrl":"/uploads/image/03/ea/03eac2176be50969b549f432e72df28bd719033042da4c6c41c3fde705e8f13a.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":44981,"postNumber":14,"raw":"蹲一个开奖","cooked":"

蹲一个开奖

\n","createdAt":"2024-12-27 14:01:07.008507","updatedAt":"2024-12-27 14:01:07.008507","replyToPostNumber":1,"replyCount":0,"likeCount":0,"wordCount":5,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":4668,"username":"IO","name":null,"avatarUrl":"/uploads/image/86/f2/86f267c0aaa73835a999b7cc3a7e7a701605574eda9a2c2a56f5ddbbba64d1a9.avif","admin":true,"moderator":false,"signatureRaw":"","signatureCooked":null}},{"id":44982,"postNumber":15,"raw":"milk 可以接收 `payload: Result, JsonRejection<>>`\n\nJsonRejection 是个 enum，里面有一个 MissingContentTypeHeader，match 到这一分支就 acquire milk，match 到其他错误就 400 Bad Request。所以不用读 headers\n\n现代英制单位是拿公制单位定义的，所以可以精准换算，就是小数比较长（","cooked":"

milk 可以接收 payload: Result<Json<>, JsonRejection<>>

JsonRejection 是个 enum，里面有一个 MissingContentTypeHeader，match 到这一分支就 acquire milk，match 到其他错误就 400 Bad Request。所以不用读 headers

现代英制单位是拿公制单位定义的，所以可以精准换算，就是小数比较长（

\n","createdAt":"2024-12-27 15:12:14.885602","updatedAt":"2024-12-27 15:15:42.817983","replyToPostNumber":7,"replyCount":0,"likeCount":1,"wordCount":74,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"❤️","count":1,"users":[{"id":4668,"username":"IO","name":null}],"hasReacted":false}],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":6205,"username":"uika_winwing","name":null,"avatarUrl":"/uploads/image/76/3b/763b1e5ad8a424c4450bb26cea5ae532e7b1cd9da926ac5d99215d7123bf6002.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":45089,"postNumber":16,"raw":"怎么没后续了（\n今天至少把 core tasks 做完了，可以参与抽奖，赚到（\n\n\n![image|690x332](/uploads/image/7e/5f/7e5f15fa7d26088774e8a80819d1e04ae827f614561890fcc4139df754fc4d3b.avif)","cooked":"

怎么没后续了（
\n今天至少把 core tasks 做完了，可以参与抽奖，赚到（

$\"image\"$

\n","createdAt":"2024-12-31 14:38:41.855131","updatedAt":"2024-12-31 14:38:41.855131","replyToPostNumber":13,"replyCount":1,"likeCount":0,"wordCount":29,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":6205,"username":"uika_winwing","name":null,"avatarUrl":"/uploads/image/76/3b/763b1e5ad8a424c4450bb26cea5ae532e7b1cd9da926ac5d99215d7123bf6002.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":45215,"postNumber":17,"raw":"后续是去和女友玩了，烂尾","cooked":"

后续是去和女友玩了，烂尾

\n","createdAt":"2025-01-05 18:31:06.495983","updatedAt":"2025-01-05 18:31:06.495983","replyToPostNumber":16,"replyCount":1,"likeCount":3,"wordCount":12,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"rolling_on_the_floor_laughing_kissing_heart","count":1,"users":[{"id":200,"username":"Srotseiticar","name":null}],"hasReacted":false},{"reaction":"❤️","count":3,"users":[{"id":200,"username":"Srotseiticar","name":null},{"id":5905,"username":"PipaQinse233","name":"PipaQinse233"},{"id":6205,"username":"uika_winwing","name":null}],"hasReacted":false}],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1277,"username":"ucw","name":null,"avatarUrl":"/uploads/image/03/ea/03eac2176be50969b549f432e72df28bd719033042da4c6c41c3fde705e8f13a.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":45216,"postNumber":18,"raw":"草。","cooked":"

草。

\n","createdAt":"2025-01-05 18:57:50.776512","updatedAt":"2025-01-05 18:57:50.776512","replyToPostNumber":17,"replyCount":0,"likeCount":0,"wordCount":2,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":6205,"username":"uika_winwing","name":null,"avatarUrl":"/uploads/image/76/3b/763b1e5ad8a424c4450bb26cea5ae532e7b1cd9da926ac5d99215d7123bf6002.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}}],"hasMore":false,"lastReadPostNumber":5,"hasUrlPostNumber":true}