js-multiaddr-to-uri/index.js
Marcin Rataj adda9366c1 feat: assume HTTP when multiaddr ends with /tcp (#7)
This makes multiaddrs ending with `/tcp/8080` to default to HTTP unless
an explicit assumeHttp: false is passed.

We also skip default ports for HTTP and HTTPS in the URL.

Motivation:
https://github.com/ipfs/js-ipfs/pull/2358#issue-307463029

License: MIT
Signed-off-by: Marcin Rataj <lidel@lidel.org>
2019-08-21 11:09:35 +01:00

59 lines
1.9 KiB
JavaScript

const Multiaddr = require('multiaddr')
const reduceValue = (_, v) => v
const tcpUri = (str, port, parts, opts) => {
// return tcp when explicitly requested
if (opts && opts.assumeHttp === false) return `tcp://${str}:${port}`
// check if tcp is the last protocol in multiaddr
let protocol = 'tcp'
let explicitPort = `:${port}`
const last = parts[parts.length - 1]
if (last.protocol === 'tcp') {
// assume http and produce clean urls
protocol = port === 443 ? 'https' : 'http'
explicitPort = port === 443 || port === 80 ? '' : explicitPort
}
return `${protocol}://${str}${explicitPort}`
}
const Reducers = {
ip4: reduceValue,
ip6: (str, content, i, parts) => (
parts.length === 1 && parts[0].protocol === 'ip6'
? content
: `[${content}]`
),
tcp: (str, content, i, parts, opts) => (
parts.some(p => ['http', 'https', 'ws', 'wss'].includes(p.protocol))
? `${str}:${content}`
: tcpUri(str, content, parts, opts)
),
udp: (str, content) => `udp://${str}:${content}`,
dnsaddr: reduceValue,
dns4: reduceValue,
dns6: reduceValue,
ipfs: (str, content) => `${str}/ipfs/${content}`,
p2p: (str, content) => `${str}/p2p/${content}`,
http: str => `http://${str}`,
https: str => `https://${str}`,
ws: str => `ws://${str}`,
wss: str => `wss://${str}`,
'p2p-websocket-star': str => `${str}/p2p-websocket-star`,
'p2p-webrtc-star': str => `${str}/p2p-webrtc-star`,
'p2p-webrtc-direct': str => `${str}/p2p-webrtc-direct`
}
module.exports = (multiaddr, opts) => (
Multiaddr(multiaddr)
.stringTuples()
.map(tuple => ({
protocol: Multiaddr.protocols.codes[tuple[0]].name,
content: tuple[1]
}))
.reduce((str, part, i, parts) => {
const reduce = Reducers[part.protocol]
if (!reduce) throw new Error(`Unsupported protocol ${part.protocol}`)
return reduce(str, part.content, i, parts, opts)
}, '')
)