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Auth.js
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Auth.js
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import {
verifyCheckCode, verifyParsedCheckCode,
generateCheckCode, generateLookupData,
parseCheckCode,
packDataArrayBuffer, parseDataArrayBuffer
} from 'source/common/module/TimedLookup.js'
import { createCacheMap } from 'source/common/data/CacheMap.js'
import { time, binary, prettyStringifyJSON } from 'source/common/format.js'
import { indentList } from 'source/common/string.js'
import { getEntityTagByContentHash } from 'source/node/module/EntityTag.js'
import { fetchLikeRequest } from 'source/node/net.js'
import { readArrayBuffer, writeArrayBuffer } from 'source/node/fs/File.js'
import { createPathPrefixLock } from 'source/node/fs/Path.js'
const saveAuthFile = async (pathFile, timedLookupData) => writeArrayBuffer(pathFile, packDataArrayBuffer(timedLookupData))
const loadAuthFile = async (pathFile) => parseDataArrayBuffer(await readArrayBuffer(pathFile))
const describeAuthFile = async (pathFile) => {
const { tag, size, tokenSize, timeGap, info, dataView } = await loadAuthFile(pathFile)
return indentList('[AuthFile]', [
`tag: ${tag}`,
`size: ${binary(size)}B`,
`tokenSize: ${tokenSize}B`,
`timeGap: ${time(timeGap * 1000)}`,
info && `info: ${prettyStringifyJSON(info)}`,
`dataViewEntityTag: ${getEntityTagByContentHash(Buffer.from(dataView.buffer))}`
].filter(Boolean))
}
const generateAuthFile = async (pathFile, { tag, size, tokenSize, timeGap, info }) => {
const timedLookupData = await generateLookupData({ tag, size, tokenSize, timeGap, info })
await saveAuthFile(pathFile, timedLookupData)
return timedLookupData
}
const generateAuthCheckCode = async (pathFile, timestamp) => generateCheckCode(await loadAuthFile(pathFile), timestamp)
const verifyAuthCheckCode = async (pathFile, checkCode, timestamp) => verifyCheckCode(await loadAuthFile(pathFile), checkCode, timestamp)
const DEFAULT_AUTH_KEY = 'auth-check-code' // TODO: NOTE: should match 'DEFAULT_AUTH_KEY' from `./html.js`
const AUTH_SKIP = 'auth-skip'
const AUTH_FILE = 'auth-file'
const AUTH_FILE_GROUP = 'auth-file-group'
const authFetchWrap = async (url, option = {}, timedLookupData, authKey) => {
const response = await fetchLikeRequest(url, {
...option,
headers: { [ authKey ]: generateCheckCode(timedLookupData), ...option.headers }
})
if (!response.ok) throw new Error(`[authFetch] status: ${response.status}`)
return response
}
const configureAuthSkip = async ({
authKey = DEFAULT_AUTH_KEY, log
}) => {
log && log('auth skip enabled')
return {
authMode: AUTH_SKIP,
authKey,
authFetch: fetchLikeRequest,
checkAuth: async () => 'auth-skip', // as a token / identity info if next responder need to use
generateAuthCheckCode: async () => 'auth-skip'
}
}
const configureAuthFile = async ({
authKey = DEFAULT_AUTH_KEY, log,
timedLookupData, // directly pass
authFile // file to load from
}) => {
if (!timedLookupData) {
timedLookupData = await loadAuthFile(authFile).catch(async (error) => {
log && log('missing auth file', error)
throw error
})
log && log('loaded auth file')
}
return {
authMode: AUTH_FILE,
authKey,
authFetch: async (url, option) => authFetchWrap(url, option, timedLookupData, authKey),
checkAuth: async (checkCode) => {
verifyCheckCode(timedLookupData, checkCode)
return timedLookupData.tag // as a token / identity info if next responder need to use
},
generateAuthCheckCode: async () => generateCheckCode(timedLookupData)
}
}
const AUTH_CACHE_EXPIRE_TIME = 5 * 60 * 1000 // 5min, in msec
const AUTH_CACHE_SIZE_SUM_MAX = 8 * 1024 * 1024 // 8MiB, in byte
const configureAuthFileGroup = async ({
authKey = DEFAULT_AUTH_KEY, log,
authFileGroupPath, // file name should match `getFileNameForTag` and `authFileGroupKeySuffix`
authFileGroupDefaultTag,
authFileGroupKeySuffix,
getFileNameForTag = authFileGroupKeySuffix ? (tag) => `${tag}${authFileGroupKeySuffix}` : (tag) => `${tag}.key`,
authCacheExpireTime = AUTH_CACHE_EXPIRE_TIME,
authCacheMap = createCacheMap({ valueSizeSumMax: AUTH_CACHE_SIZE_SUM_MAX, expireAfter: authCacheExpireTime, eventHub: null })
}) => {
const getPath = createPathPrefixLock(authFileGroupPath)
const getTimedLookupData = (tag) => authCacheMap.get(tag) || loadAuthFile(getPath(getFileNameForTag(tag))).then(
(timedLookupData) => {
authCacheMap.set(tag, timedLookupData, timedLookupData.dataView.byteLength)
log && log(`loaded auth file for tag: ${tag}`)
return timedLookupData
},
(error) => {
__DEV__ && console.log('getTimedLookupData failed', error)
log && log(`no auth file for tag: ${tag}`)
throw error
}
)
return {
authMode: AUTH_FILE_GROUP,
authKey,
authFetch: async (url, option, tag = authFileGroupDefaultTag) => authFetchWrap(url, option, await getTimedLookupData(tag), authKey),
checkAuth: async (checkCode) => {
const parsedCheckCode = parseCheckCode(checkCode)
const tag = parsedCheckCode[ 0 ]
const timedLookupData = await getTimedLookupData(tag)
verifyParsedCheckCode(timedLookupData, parsedCheckCode)
return timedLookupData.tag
},
generateAuthCheckCode: async (tag = authFileGroupDefaultTag) => generateCheckCode(await getTimedLookupData(tag))
}
}
const configureAuth = async ({
authKey = DEFAULT_AUTH_KEY, log,
authSkip = false,
authFile,
authFileGroupPath, authFileGroupDefaultTag, authFileGroupKeySuffix
}) => {
if (authSkip) return configureAuthSkip({ authKey, log })
if (authFile) return configureAuthFile({ authFile, authKey, log })
if (authFileGroupPath) return configureAuthFileGroup({ authFileGroupPath, authFileGroupDefaultTag, authFileGroupKeySuffix, authKey, log })
throw new Error('no auth mode option provided')
}
export {
saveAuthFile, loadAuthFile,
describeAuthFile, generateAuthFile,
generateAuthCheckCode, verifyAuthCheckCode,
DEFAULT_AUTH_KEY,
AUTH_SKIP,
AUTH_FILE,
AUTH_FILE_GROUP,
configureAuthSkip,
configureAuthFile,
configureAuthFileGroup,
configureAuth
}