summaly

Installation

npm install @misskey-dev/summaly

Usage

As a function:

import { summaly } from 'summaly';

summaly(url[, opts])

As Fastify plugin: (will listen GET of /)

import Summaly from 'summaly';

fastify.register(Summaly[, opts])

Run the server:

git clone https://github.com/misskey-dev/summaly.git
cd summaly
NODE_ENV=development npm install
npm run build
npm run serve

opts (SummalyOptions)

Property	Type	Description	Default
lang	string	Accept-Language for the request	null
followRedirects	boolean	Whether follow redirects	true
plugins	plugin[] (see below)	Custom plugins	null
agent	Got.Agents	Custom HTTP agent (see below)	null
userAgent	string	User-Agent for the request	SummalyBot/[version]
responseTimeout	number	Set timeouts for each phase, such as host name resolution and socket communication.	20000
operationTimeout	number	Set the timeout from the start to the end of the request.	60000
contentLengthLimit	number	If set to true, an error will occur if the content-length value returned from the other server is larger than this parameter (or if the received body size exceeds this parameter).	10485760
contentLengthRequired	boolean	If set to true, it will be an error if the other server does not return content-length.	false

Plugin

interface SummalyPlugin {
	test: (url: URL) => boolean;
	summarize: (url: URL) => Promise<Summary>;
}

urls are WHATWG URL since v4.

Custom HTTP agent for proxy

You can specify agents to be passed to Got for proxy use, etc.
https://github.com/sindresorhus/got/blob/v12.6.0/documentation/tips.md#proxying

⚠️If you set some agent, local IP rejecting will not work.⚠️
(Summaly usually rejects local IPs.)

(Summaly currently does not support http2.)

Returns

A Promise of an Object that contains properties below:

※ Almost all values are nullable. player should not be null.

SummalyResult

Property	Type	Description
title	string | null	The title of the web page
icon	string | null	The url of the icon of the web page
description	string | null	The description of the web page
thumbnail	string | null	The url of the thumbnail of the web page
sitename	string | null	The name of the web site
player	Player	The player of the web page
sensitive	boolean	Whether the url is sensitive
activityPub	string | null	The url of the ActivityPub representation of that web page
url	string	The url of the web page

Summary

Omit<SummalyResult, "url">

Player

Property	Type	Description
url	string | null	The url of the player
width	number | null	The width of the player
height	number | null	The height of the player
allow	string[]	The names of the allowed permissions for iframe

Currently the possible items in allow are:

• autoplay
• clipboard-write
• fullscreen
• encrypted-media
• picture-in-picture
• web-share

See Permissions Policy in MDN for details of them.

Example

import { summaly } from 'summaly';

const summary = await summaly('https://www.youtube.com/watch?v=NMIEAhH_fTU');

console.log(summary);

will be ... ↓

{
	"title": "【アイドルマスター】「Stage Bye Stage」(歌：島村卯月、渋谷凛、本田未央)",
	"icon": "https://www.youtube.com/s/desktop/28b0985e/img/favicon.ico",
	"description": "Website▶https://columbia.jp/idolmaster/Playlist▶https://www.youtube.com/playlist?list=PL83A2998CF3BBC86D2018年7月18日発売予定THE IDOLM@STER CINDERELLA GIRLS CG STAR...",
	"thumbnail": "https://i.ytimg.com/vi/NMIEAhH_fTU/maxresdefault.jpg",
	"player": {
		"url": "https://www.youtube.com/embed/NMIEAhH_fTU?feature=oembed",
		"width": 200,
		"height": 113,
		"allow": [
			"autoplay",
			"clipboard-write",
			"encrypted-media",
			"picture-in-picture",
			"web-share",
			"fullscreen",
		]
	},
	"sitename": "YouTube",
	"sensitive": false,
	"activityPub": null,
	"url": "https://www.youtube.com/watch?v=NMIEAhH_fTU"
}

Testing

npm run test

License

MIT