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util.js
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util.js
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'use strict'
const assert = require('assert')
const { kDestroyed } = require('./symbols')
const { IncomingMessage } = require('http')
const util = require('util')
const net = require('net')
const { InvalidArgumentError } = require('./errors')
function nop () {}
function isStream (body) {
return !!(body && typeof body.on === 'function')
}
function parseURL (url) {
if (typeof url === 'string') {
url = new URL(url)
}
if (!url || typeof url !== 'object') {
throw new InvalidArgumentError('invalid url')
}
if (url.port != null && url.port !== '' && !Number.isFinite(parseInt(url.port))) {
throw new InvalidArgumentError('invalid port')
}
if (url.hostname != null && typeof url.hostname !== 'string') {
throw new InvalidArgumentError('invalid hostname')
}
if (!/https?/.test(url.protocol)) {
throw new InvalidArgumentError('invalid protocol')
}
if (!(url instanceof URL)) {
const port = url.port || {
'http:': 80,
'https:': 443
}[url.protocol]
assert(port != null)
const path = url.path || `${url.pathname || '/'}${url.search || ''}`
url = new URL(`${url.protocol}//${url.hostname}:${port}${path}`)
}
return url
}
function parseOrigin (url) {
url = parseURL(url)
if (/\/.+/.test(url.pathname) || url.search || url.hash) {
throw new InvalidArgumentError('invalid url')
}
return url
}
function getServerName (host) {
if (!host) {
return null
}
let servername = host
if (servername.startsWith('[')) {
const idx = servername.indexOf(']')
servername = idx === -1 ? servername : servername.substr(1, idx - 1)
} else {
servername = servername.split(':', 1)[0]
}
if (net.isIP(servername)) {
servername = null
}
return servername
}
function bodyLength (body) {
if (body && typeof body.on === 'function') {
const state = body._readableState
return state && state.ended === true && Number.isFinite(state.length)
? state.length
: null
}
assert(!body || Number.isFinite(body.byteLength))
return body ? body.length : 0
}
function isDestroyed (stream) {
return !stream || !!(stream.destroyed || stream[kDestroyed])
}
function destroy (stream, err) {
if (!isStream(stream) || isDestroyed(stream)) {
return
}
if (typeof stream.destroy === 'function') {
if (err || Object.getPrototypeOf(stream).constructor !== IncomingMessage) {
stream.destroy(err)
}
} else if (err) {
// Node streams use nextTick.
process.nextTick((stream, err) => {
stream.emit('error', err)
}, stream, err)
}
if (stream.destroyed !== true) {
stream[kDestroyed] = true
}
}
const KEEPALIVE_TIMEOUT_EXPR = /timeout=(\d+)/
function parseKeepAliveTimeout (val) {
const m = val.match(KEEPALIVE_TIMEOUT_EXPR)
return m ? parseInt(m[1]) * 1000 : null
}
function parseHeaders (headers, obj = {}) {
for (let i = 0; i < headers.length; i += 2) {
const key = headers[i].toLowerCase()
let val = obj[key]
if (!val) {
obj[key] = headers[i + 1]
} else {
if (!Array.isArray(val)) {
val = [val]
obj[key] = val
}
val.push(headers[i + 1])
}
}
return obj
}
function isBuffer (buffer) {
// See, https://github.com/mcollina/undici/pull/319
return buffer instanceof Uint8Array || Buffer.isBuffer(buffer)
}
function errnoException (code, syscall) {
const name = util.getSystemErrorName(code)
const err = new Error(`${syscall} ${name}`)
err.errno = err
err.code = code
err.syscall = syscall
return err
}
module.exports = {
nop,
parseOrigin,
parseURL,
getServerName,
errnoException,
isStream,
isDestroyed,
parseHeaders,
parseKeepAliveTimeout,
destroy,
bodyLength,
isBuffer,
queueMicrotask: global.queueMicrotask || (cb => Promise.resolve()
.then(cb)
.catch(err => setTimeout(() => { throw err }, 0)))
}