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Refactor homeserver lookup code
continuous-integration/drone/push Build was killed Details

This commit is contained in:
Bad 2020-10-21 21:11:45 +02:00
parent f1b75f5e10
commit 6f67ddbce5
1 changed files with 51 additions and 31 deletions
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82
src/js/login.js
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@ -71,46 +71,23 @@ class Form extends ElemJS {
this.on("submit", this.submit.bind(this))
}
async submit() {
if (this.processing) return
this.processing = true
if (!username.isValid()) return this.cancel("Username is not valid.")
// Resolve homeserver address
let currentAddress = homeserver.value
let ok = false
while (!ok) {
if (!currentAddress.match(/^https?:\/\//)) {
console.warn(`${currentAddress} doesn't specify the protocol, assuming https`)
currentAddress = "https://" + currentAddress
}
currentAddress = currentAddress.replace(/\/*$/, "")
this.status(`Looking up homeserver... trying ${currentAddress}`)
try {
// check if we found the actual matrix server
try {
const versions = await fetch(`${currentAddress}/_matrix/client/versions`).then(res => res.json())
if (Array.isArray(versions.versions)) {
ok = true
break
}
} catch (e) {}
// find the next matrix server in the chain
const root = await fetch(`${currentAddress}/.well-known/matrix/client`).then(res => res.json())
let nextAddress = root["m.homeserver"].base_url
nextAddress = nextAddress.replace(/\/*$/, "")
if (currentAddress === nextAddress) {
ok = true
}
currentAddress = nextAddress
} catch (e) {
return this.cancel(`Failed to look up server ${currentAddress}`)
}
let domain
try {
domain = await this.findHomeserver(homeserver.value)
} catch(e) {
return this.cancel(e.message)
}
// Request access token
this.status("Logging in...")
const root = await fetch(`${currentAddress}/_matrix/client/r0/login`, {
const root = await fetch(`${domain}/_matrix/client/r0/login`, {
method: "POST",
body: JSON.stringify({
type: "m.login.password",
@ -130,12 +107,52 @@ class Form extends ElemJS {
}
localStorage.setItem("mx_user_id", root.user_id)
localStorage.setItem("domain", currentAddress)
localStorage.setItem("domain", domain)
localStorage.setItem("access_token", root.access_token)
location.assign("../")
}
async findHomeserver(address, maxDepth = 5) {
//Protects us from servers sending us on a redirect loop
maxDepth--
if(maxDepth<=0) throw new Error(`Failed to look up homeserver, maximum search depth reached`)
if (!address.match(/^https?:\/\//)) {
console.warn(`${address} doesn't specify the protocol, assuming https`)
address = "https://" + address
}
address = address.replace(/\/*$/, "")
this.status(`Looking up homeserver... trying ${address}`)
// check if we found the actual matrix server
const versionsReq = await fetch(`${address}/_matrix/client/versions`).catch(()=>{});
if(versionsReq?.ok) {
const versions = await versionsReq.json().catch(()=>{})
if (Array.isArray(versions.versions)) {
return address
}
}
// find the next matrix server in the chain
const root = await fetch(`${address}/.well-known/matrix/client`).then(res => res.json()).catch(e => {
console.error(e)
throw new Error(`Failed to look up server ${address}`)
})
let nextAddress = root["m.homeserver"].base_url
nextAddress = nextAddress.replace(/\/*$/, "")
if (address === nextAddress) {
throw new Error(`Failed to look up server ${address}, /.well-known/matrix/client found a redirect loop`);
}
return this.findHomeserver(nextAddress, maxDepth)
}
status(message) {
feedback.setLoading(true)
feedback.message(message)
@ -149,3 +166,6 @@ class Form extends ElemJS {
}
const form = new Form()