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'use strict'
const http = require('http')
const https = require('https')
const { URL } = require('url')
const isStream = require('is-stream')
const caseless = require('caseless')
const bytes = require('bytesish')
const bent = require('./core')
const zlib = require('zlib')
const { PassThrough } = require('stream')
const compression = {}
/* istanbul ignore else */
if (zlib.createBrotliDecompress) compression.br = () => zlib.createBrotliDecompress()
/* istanbul ignore else */
if (zlib.createGunzip) compression.gzip = () => zlib.createGunzip()
/* istanbul ignore else */
if (zlib.createInflate) compression.deflate = () => zlib.createInflate()
const acceptEncoding = Object.keys(compression).join(', ')
const getResponse = resp => {
const ret = new PassThrough()
ret.statusCode = resp.statusCode
ret.status = resp.statusCode
ret.statusMessage = resp.statusMessage
ret.headers = resp.headers
ret._response = resp
if (ret.headers['content-encoding']) {
const encodings = ret.headers['content-encoding'].split(', ').reverse()
while (encodings.length) {
const enc = encodings.shift()
if (compression[enc]) {
const decompress = compression[enc]()
decompress.on('error', (e) => ret.emit('error', new Error('ZBufError', e)))
resp = resp.pipe(decompress)
} else {
break
}
}
}
return resp.pipe(ret)
}
class StatusError extends Error {
constructor (res, ...params) {
super(...params)
Error.captureStackTrace(this, StatusError)
this.name = 'StatusError'
this.message = res.statusMessage
this.statusCode = res.statusCode
this.json = res.json
this.text = res.text
this.arrayBuffer = res.arrayBuffer
this.headers = res.headers
let buffer
const get = () => {
if (!buffer) buffer = this.arrayBuffer()
return buffer
}
Object.defineProperty(this, 'responseBody', { get })
}
}
const getBuffer = stream => new Promise((resolve, reject) => {
const parts = []
stream.on('error', reject)
stream.on('end', () => resolve(Buffer.concat(parts)))
stream.on('data', d => parts.push(d))
})
const decodings = res => {
let _buffer
res.arrayBuffer = () => {
if (!_buffer) {
_buffer = getBuffer(res)
return _buffer
} else {
throw new Error('body stream is locked')
}
}
res.text = () => res.arrayBuffer().then(buff => buff.toString())
res.json = async () => {
const str = await res.text()
try {
return JSON.parse(str)
} catch (e) {
e.message += `str"${str}"`
throw e
}
}
}
const mkrequest = (statusCodes, method, encoding, headers, baseurl) => (_url, body = null, _headers = {}) => {
_url = baseurl + (_url || '')
const parsed = new URL(_url)
let h
if (parsed.protocol === 'https:') {
h = https
} else if (parsed.protocol === 'http:') {
h = http
} else {
throw new Error(`Unknown protocol, ${parsed.protocol}`)
}
const request = {
path: parsed.pathname + parsed.search,
port: parsed.port,
method: method,
headers: { ...(headers || {}), ..._headers },
hostname: parsed.hostname
}
if (parsed.username || parsed.password) {
request.auth = [parsed.username, parsed.password].join(':')
}
const c = caseless(request.headers)
if (encoding === 'json') {
if (!c.get('accept')) {
c.set('accept', 'application/json')
}
}
if (!c.has('accept-encoding')) {
c.set('accept-encoding', acceptEncoding)
}
return new Promise((resolve, reject) => {
const req = h.request(request, async res => {
res = getResponse(res)
res.on('error', reject)
decodings(res)
res.status = res.statusCode
if (!statusCodes.has(res.statusCode)) {
return reject(new StatusError(res))
}
if (!encoding) return resolve(res)
else {
/* istanbul ignore else */
if (encoding === 'buffer') {
resolve(res.arrayBuffer())
} else if (encoding === 'json') {
resolve(res.json())
} else if (encoding === 'string') {
resolve(res.text())
}
}
})
req.on('error', reject)
if (body) {
if (body instanceof ArrayBuffer || ArrayBuffer.isView(body)) {
body = bytes.native(body)
}
if (Buffer.isBuffer(body)) {
// noop
} else if (typeof body === 'string') {
body = Buffer.from(body)
} else if (isStream(body)) {
body.pipe(req)
body = null
} else if (typeof body === 'object') {
if (!c.has('content-type')) {
req.setHeader('content-type', 'application/json')
}
body = Buffer.from(JSON.stringify(body))
} else {
reject(new Error('Unknown body type.'))
}
if (body) {
req.setHeader('content-length', body.length)
req.end(body)
}
} else {
req.end()
}
})
}
module.exports = bent(mkrequest)
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