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This commit is contained in:
lalBi94
350
node_modules/minipass-fetch/lib/body.js
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vendored
Normal file
350
node_modules/minipass-fetch/lib/body.js
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'use strict'
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const Minipass = require('minipass')
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const MinipassSized = require('minipass-sized')
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const Blob = require('./blob.js')
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const { BUFFER } = Blob
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const FetchError = require('./fetch-error.js')
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// optional dependency on 'encoding'
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let convert
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try {
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convert = require('encoding').convert
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} catch (e) {
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// defer error until textConverted is called
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}
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const INTERNALS = Symbol('Body internals')
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const CONSUME_BODY = Symbol('consumeBody')
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class Body {
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constructor (bodyArg, options = {}) {
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const { size = 0, timeout = 0 } = options
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const body = bodyArg === undefined || bodyArg === null ? null
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: isURLSearchParams(bodyArg) ? Buffer.from(bodyArg.toString())
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: isBlob(bodyArg) ? bodyArg
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: Buffer.isBuffer(bodyArg) ? bodyArg
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: Object.prototype.toString.call(bodyArg) === '[object ArrayBuffer]'
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? Buffer.from(bodyArg)
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: ArrayBuffer.isView(bodyArg)
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? Buffer.from(bodyArg.buffer, bodyArg.byteOffset, bodyArg.byteLength)
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: Minipass.isStream(bodyArg) ? bodyArg
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: Buffer.from(String(bodyArg))
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this[INTERNALS] = {
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body,
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disturbed: false,
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error: null,
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}
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this.size = size
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this.timeout = timeout
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if (Minipass.isStream(body)) {
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body.on('error', er => {
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const error = er.name === 'AbortError' ? er
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: new FetchError(`Invalid response while trying to fetch ${
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this.url}: ${er.message}`, 'system', er)
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this[INTERNALS].error = error
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})
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}
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}
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get body () {
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return this[INTERNALS].body
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}
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get bodyUsed () {
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return this[INTERNALS].disturbed
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}
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arrayBuffer () {
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return this[CONSUME_BODY]().then(buf =>
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buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength))
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}
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blob () {
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const ct = this.headers && this.headers.get('content-type') || ''
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return this[CONSUME_BODY]().then(buf => Object.assign(
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new Blob([], { type: ct.toLowerCase() }),
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{ [BUFFER]: buf }
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))
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}
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async json () {
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const buf = await this[CONSUME_BODY]()
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try {
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return JSON.parse(buf.toString())
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} catch (er) {
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throw new FetchError(
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`invalid json response body at ${this.url} reason: ${er.message}`,
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'invalid-json'
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)
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}
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}
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text () {
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return this[CONSUME_BODY]().then(buf => buf.toString())
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}
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buffer () {
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return this[CONSUME_BODY]()
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}
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textConverted () {
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return this[CONSUME_BODY]().then(buf => convertBody(buf, this.headers))
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}
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[CONSUME_BODY] () {
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if (this[INTERNALS].disturbed) {
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return Promise.reject(new TypeError(`body used already for: ${
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this.url}`))
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}
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this[INTERNALS].disturbed = true
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if (this[INTERNALS].error) {
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return Promise.reject(this[INTERNALS].error)
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}
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// body is null
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if (this.body === null) {
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return Promise.resolve(Buffer.alloc(0))
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}
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if (Buffer.isBuffer(this.body)) {
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return Promise.resolve(this.body)
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}
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const upstream = isBlob(this.body) ? this.body.stream() : this.body
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/* istanbul ignore if: should never happen */
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if (!Minipass.isStream(upstream)) {
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return Promise.resolve(Buffer.alloc(0))
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}
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const stream = this.size && upstream instanceof MinipassSized ? upstream
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: !this.size && upstream instanceof Minipass &&
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!(upstream instanceof MinipassSized) ? upstream
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: this.size ? new MinipassSized({ size: this.size })
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: new Minipass()
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// allow timeout on slow response body, but only if the stream is still writable. this
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// makes the timeout center on the socket stream from lib/index.js rather than the
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// intermediary minipass stream we create to receive the data
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const resTimeout = this.timeout && stream.writable ? setTimeout(() => {
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stream.emit('error', new FetchError(
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`Response timeout while trying to fetch ${
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this.url} (over ${this.timeout}ms)`, 'body-timeout'))
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}, this.timeout) : null
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// do not keep the process open just for this timeout, even
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// though we expect it'll get cleared eventually.
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if (resTimeout && resTimeout.unref) {
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resTimeout.unref()
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}
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// do the pipe in the promise, because the pipe() can send too much
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// data through right away and upset the MP Sized object
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return new Promise((resolve, reject) => {
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// if the stream is some other kind of stream, then pipe through a MP
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// so we can collect it more easily.
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if (stream !== upstream) {
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upstream.on('error', er => stream.emit('error', er))
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upstream.pipe(stream)
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}
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resolve()
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}).then(() => stream.concat()).then(buf => {
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clearTimeout(resTimeout)
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return buf
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}).catch(er => {
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clearTimeout(resTimeout)
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// request was aborted, reject with this Error
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if (er.name === 'AbortError' || er.name === 'FetchError') {
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throw er
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} else if (er.name === 'RangeError') {
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throw new FetchError(`Could not create Buffer from response body for ${
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this.url}: ${er.message}`, 'system', er)
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} else {
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// other errors, such as incorrect content-encoding or content-length
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throw new FetchError(`Invalid response body while trying to fetch ${
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this.url}: ${er.message}`, 'system', er)
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}
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})
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}
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static clone (instance) {
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if (instance.bodyUsed) {
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throw new Error('cannot clone body after it is used')
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}
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const body = instance.body
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// check that body is a stream and not form-data object
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// NB: can't clone the form-data object without having it as a dependency
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if (Minipass.isStream(body) && typeof body.getBoundary !== 'function') {
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// create a dedicated tee stream so that we don't lose data
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// potentially sitting in the body stream's buffer by writing it
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// immediately to p1 and not having it for p2.
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const tee = new Minipass()
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const p1 = new Minipass()
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const p2 = new Minipass()
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tee.on('error', er => {
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p1.emit('error', er)
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p2.emit('error', er)
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})
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body.on('error', er => tee.emit('error', er))
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tee.pipe(p1)
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tee.pipe(p2)
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body.pipe(tee)
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// set instance body to one fork, return the other
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instance[INTERNALS].body = p1
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return p2
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} else {
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return instance.body
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}
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}
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static extractContentType (body) {
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return body === null || body === undefined ? null
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: typeof body === 'string' ? 'text/plain;charset=UTF-8'
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: isURLSearchParams(body)
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? 'application/x-www-form-urlencoded;charset=UTF-8'
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: isBlob(body) ? body.type || null
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: Buffer.isBuffer(body) ? null
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: Object.prototype.toString.call(body) === '[object ArrayBuffer]' ? null
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: ArrayBuffer.isView(body) ? null
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: typeof body.getBoundary === 'function'
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? `multipart/form-data;boundary=${body.getBoundary()}`
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: Minipass.isStream(body) ? null
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: 'text/plain;charset=UTF-8'
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}
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static getTotalBytes (instance) {
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const { body } = instance
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return (body === null || body === undefined) ? 0
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: isBlob(body) ? body.size
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: Buffer.isBuffer(body) ? body.length
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: body && typeof body.getLengthSync === 'function' && (
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// detect form data input from form-data module
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body._lengthRetrievers &&
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/* istanbul ignore next */ body._lengthRetrievers.length === 0 || // 1.x
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body.hasKnownLength && body.hasKnownLength()) // 2.x
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? body.getLengthSync()
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: null
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}
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static writeToStream (dest, instance) {
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const { body } = instance
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if (body === null || body === undefined) {
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dest.end()
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} else if (Buffer.isBuffer(body) || typeof body === 'string') {
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dest.end(body)
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} else {
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// body is stream or blob
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const stream = isBlob(body) ? body.stream() : body
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stream.on('error', er => dest.emit('error', er)).pipe(dest)
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}
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return dest
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}
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}
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Object.defineProperties(Body.prototype, {
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body: { enumerable: true },
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bodyUsed: { enumerable: true },
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arrayBuffer: { enumerable: true },
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blob: { enumerable: true },
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json: { enumerable: true },
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text: { enumerable: true },
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})
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const isURLSearchParams = obj =>
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// Duck-typing as a necessary condition.
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(typeof obj !== 'object' ||
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typeof obj.append !== 'function' ||
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typeof obj.delete !== 'function' ||
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typeof obj.get !== 'function' ||
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typeof obj.getAll !== 'function' ||
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typeof obj.has !== 'function' ||
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typeof obj.set !== 'function') ? false
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// Brand-checking and more duck-typing as optional condition.
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: obj.constructor.name === 'URLSearchParams' ||
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Object.prototype.toString.call(obj) === '[object URLSearchParams]' ||
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typeof obj.sort === 'function'
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const isBlob = obj =>
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typeof obj === 'object' &&
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typeof obj.arrayBuffer === 'function' &&
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typeof obj.type === 'string' &&
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typeof obj.stream === 'function' &&
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typeof obj.constructor === 'function' &&
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typeof obj.constructor.name === 'string' &&
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/^(Blob|File)$/.test(obj.constructor.name) &&
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/^(Blob|File)$/.test(obj[Symbol.toStringTag])
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const convertBody = (buffer, headers) => {
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/* istanbul ignore if */
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if (typeof convert !== 'function') {
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throw new Error('The package `encoding` must be installed to use the textConverted() function')
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}
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const ct = headers && headers.get('content-type')
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let charset = 'utf-8'
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let res
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// header
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if (ct) {
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res = /charset=([^;]*)/i.exec(ct)
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}
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// no charset in content type, peek at response body for at most 1024 bytes
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const str = buffer.slice(0, 1024).toString()
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// html5
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if (!res && str) {
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res = /<meta.+?charset=(['"])(.+?)\1/i.exec(str)
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}
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// html4
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if (!res && str) {
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res = /<meta[\s]+?http-equiv=(['"])content-type\1[\s]+?content=(['"])(.+?)\2/i.exec(str)
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if (!res) {
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res = /<meta[\s]+?content=(['"])(.+?)\1[\s]+?http-equiv=(['"])content-type\3/i.exec(str)
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if (res) {
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res.pop()
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} // drop last quote
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}
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if (res) {
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res = /charset=(.*)/i.exec(res.pop())
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}
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}
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// xml
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if (!res && str) {
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res = /<\?xml.+?encoding=(['"])(.+?)\1/i.exec(str)
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}
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// found charset
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if (res) {
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charset = res.pop()
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// prevent decode issues when sites use incorrect encoding
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// ref: https://hsivonen.fi/encoding-menu/
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if (charset === 'gb2312' || charset === 'gbk') {
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charset = 'gb18030'
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}
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}
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// turn raw buffers into a single utf-8 buffer
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return convert(
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buffer,
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'UTF-8',
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charset
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).toString()
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}
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module.exports = Body
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