This node script converts a base64-encoded ShadowSocks subscription string to a Surge proxies configuration.

ss_subscribe_to_surge.js

const querystring = require('querystring')

let args = process.argv.slice(2)

if (!args[0]) {
    console.error("Usage: node index.js [subscribe_list_base64_encoded]")
    process.exit(1)
}

const base64Decode = (encoded) => {
    return Buffer.from(encoded, 'base64').toString()
}

let ssrLinks = base64Decode(args[0]).trim().split("\n")
let hosts = []

ssrLinks.forEach(link => {
    let serverInfo = base64Decode(link.slice(6)).split(":")

    let host = serverInfo[0]
    let port = serverInfo[1]
    let protocol = serverInfo[2]
    let encoding = serverInfo[3]
    let obfs = serverInfo[4]
    
    let temp = serverInfo[5].split("/")
    let password = base64Decode(temp[0])

    let params = temp[1]

    if (params.slice(0, 1) === "?")
        params = params.slice(1)

    if (parseInt(port) == 0) return

    params = querystring.parse(params)

    Object.keys(params).forEach(property => {
        params[property] = base64Decode(params[property]).trim()
    })

    hosts.push({
        host: host.trim(),
        port: port.trim(),
        protocol: protocol.trim(),
        encoding: encoding.trim(),
        obfs: obfs.trim(),
        password: password.trim(),
        params: params
    })
}, this)

surgeList = hosts.map((el, idx) => {
    return `${el.params.remarks} = ss, ${el.host}, ${el.port}, encrypt-method=${el.encoding}, password=${el.password}`
})

surgeList.unshift("[Proxy]")
surgeList.push("")
surgeList.push("[Proxy Group]")
surgeList.push("PROXY = select, " + hosts.map(el => el.params.remarks).join(", "))

console.log(surgeList.join("\n"))