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HTML 5.2?

W3C 推出 HTML 5.2,新的 W3C Recommendation...

但網頁開發已經沒有人在管 W3C 的 HTML X.Y 了 (像是之前的 HTML 5.1),大家都是直接翻資料查某個 feature 的支援度來決定能不能用,像是翻 Can I use... 或是翻 MDN

就隨便看看吧... o_o

直接在網頁上使用 WebTorrent

看到 GitHub 上的「mikeal/webtorrent-component」這個專案,可以很方便直接嵌入 BitTorrent 的資源,像是這樣嵌:

<script src="https://cdn.jsdelivr.net/npm/webtorrent-component@latest/dist/webtorrent-component.min.js"></script>

<web-torrent src="magnet:?xt=urn:btih:08ada5a7a6183aae1e09d831df6748d566095a10&dn=Sintel&tr=wss%3A%2F%2Ftracker.btorrent.xyz&tr=wss%3A%2F%2Ftracker.fastcast.nz&tr=wss%3A%2F%2Ftracker.openwebtorrent.com&ws=https%3A%2F%2Fwebtorrent.io%2Ftorrents%2F&xs=https%3A%2F%2Fwebtorrent.io%2Ftorrents%2Fsintel.torrent" file="Sintel.mp4" />

如果拿來跟「Using BitTorrent with Amazon S3」用的話可以在量大的時候省一些頻寬,並且在量小的時候還是維持有 seed (透過 Amazon S3 的服務做)。

直接從 IMDb 編號看影片

看到「Now Anyone Can Embed a Pirate Movie in a Website」這邊介紹的東西,直接輸入 IMDb 的編號 (包括 tt 開頭的那串編號),他就自動拉出 embed code:

然後可以直接線上觀看:

然後還支援字幕 (唔):

Interestingly, should one of those sources be Google Video, Vodlocker says its player offers Chromecast and subtitle support.

官網有寫來源是到處找:

VoDLocker searches all general video hosters like youtube, google drive, openload...

看起來整塊技術其實都是現成的。透過 search engine 加上定期的檢查機制與回報機制就可以做完 @_@

Cloudbleed:Cloudflare 這次的安全問題

Cloudflare 把完整的時間軸與影響範圍都列出來了:「Incident report on memory leak caused by Cloudflare parser bug」。

出自於 2/18 時 GoogleTavis Ormandy 直接在 Twitter 上找 Cloudflare 的人:

Google 的 Project Zero 上的資料:「cloudflare: Cloudflare Reverse Proxies are Dumping Uninitialized Memory」。

起因在於 bug 造成有時候會送出不應該送的東西,可能包含了敏感資料:

It turned out that in some unusual circumstances, which I’ll detail below, our edge servers were running past the end of a buffer and returning memory that contained private information such as HTTP cookies, authentication tokens, HTTP POST bodies, and other sensitive data.

不過這邊不包括 SSL 的 key,主要是因為隔離開了:

For the avoidance of doubt, Cloudflare customer SSL private keys were not leaked. Cloudflare has always terminated SSL connections through an isolated instance of NGINX that was not affected by this bug.

不過由於這些敏感資料甚至還被 Google 收進 search engine,算是相當的嚴重,所以不只是 Cloudflare 得修好這個問題,還得跟眾多的 search engine 合作將這些資料移除:

Because of the seriousness of such a bug, a cross-functional team from software engineering, infosec and operations formed in San Francisco and London to fully understand the underlying cause, to understand the effect of the memory leakage, and to work with Google and other search engines to remove any cached HTTP responses.

bug 影響的時間從 2016/09/22 開始:

2016-09-22 Automatic HTTP Rewrites enabled
2017-01-30 Server-Side Excludes migrated to new parser
2017-02-13 Email Obfuscation partially migrated to new parser
2017-02-18 Google reports problem to Cloudflare and leak is stopped

而以 2/13 到 2/18 的流量反推估算,大約是 0.00003% 的 request 會可能產生這樣的問題:

The greatest period of impact was from February 13 and February 18 with around 1 in every 3,300,000 HTTP requests through Cloudflare potentially resulting in memory leakage (that’s about 0.00003% of requests).

不過不得不說 Tavis Ormandy 真的很硬,在沒有 source code 以及 Cloudflare 幫助的情況下直接打出可重製的步驟:

I worked with cloudflare over the weekend to help clean up where I could. I've verified that the original reproduction steps I sent cloudflare no longer work.

事發後完整的時間軸:

2017-02-18 0011 Tweet from Tavis Ormandy asking for Cloudflare contact information
2017-02-18 0032 Cloudflare receives details of bug from Google
2017-02-18 0040 Cross functional team assembles in San Francisco
2017-02-18 0119 Email Obfuscation disabled worldwide
2017-02-18 0122 London team joins
2017-02-18 0424 Automatic HTTPS Rewrites disabled worldwide
2017-02-18 0722 Patch implementing kill switch for cf-html parser deployed worldwide
2017-02-20 2159 SAFE_CHAR fix deployed globally
2017-02-21 1803 Automatic HTTPS Rewrites, Server-Side Excludes and Email Obfuscation re-enabled worldwide

另外在「List of Sites possibly affected by Cloudflare's #Cloudbleed HTTPS Traffic Leak」這邊有人整理出受影響的大站台有哪些 (小站台就沒列上去了)。

RFC 7763:text/markdown

Markdown 的 RFC:「The text/markdown Media Type」。

This document registers the text/markdown media type for use with Markdown, a family of plain-text formatting syntaxes that optionally can be converted to formal markup languages such as HTML.

雖然是 Category: Informational,但有個標準後是不是有機會在瀏覽器裡面原生支援?

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