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Add option to override fetch implementation #90

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merged 2 commits into from
May 20, 2022
Merged

Add option to override fetch implementation #90

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41ef9c9
Add option to override fetch implementation
wereHamster May 19, 2022
f1954e0
Add site_name to open_graph type
wereHamster May 20, 2022
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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,7 @@ type Metadata = {
}[]
description?: string
determiner?: string
site_name?: string
locale: string
locale_alt: string
videos: {
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30 changes: 18 additions & 12 deletions src/index.ts
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Expand Up @@ -30,7 +30,7 @@ function unfurl (url: string, opts?: Opts): Promise<Metadata> {
Number.isInteger(opts.size) || (opts.size = 0)

const ctx: {
url?: string;
url: string;
oembedUrl?: string;
} = {
url
Expand All @@ -42,17 +42,23 @@ function unfurl (url: string, opts?: Opts): Promise<Metadata> {
.then(parse(ctx))
}

async function getPage (url, opts: Opts) {
const res = await fetch(new URL(url), {
headers: {
Accept: 'text/html, application/xhtml+xml',
'User-Agent': opts.userAgent
},
// @ts-ignore
size: opts.size,
follow: opts.follow,
timeout: opts.timeout
})
async function getPage (url: string, opts: Opts) {
const res = await (() => {
if (opts.fetch) {
return opts.fetch(url)
} else {
return fetch(new URL(url), {
headers: {
Accept: 'text/html, application/xhtml+xml',
'User-Agent': opts.userAgent
},
// @ts-ignore
size: opts.size,
follow: opts.follow,
timeout: opts.timeout
})
}
})()

const buf = Buffer.from(await res.arrayBuffer())
const contentType = res.headers.get('Content-Type')
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3 changes: 3 additions & 0 deletions src/types.ts
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Expand Up @@ -11,6 +11,8 @@ export type Opts = {
size?: number
/** User-Agent string is often used for content negotiation */
userAgent?: string
/** Custom fetch implementation */
fetch?: (url: string) => Promise<any /* Response */>
}

export type Metadata = {
Expand Down Expand Up @@ -87,6 +89,7 @@ export type Metadata = {
}[]
description?: string
determiner?: string
site_name?: string
locale: string
locale_alt: string
videos: {
Expand Down