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'use strict'
const util = require('../core/util')
const { InvalidArgumentError, RequestAbortedError } = require('../core/errors')
const DecoratorHandler = require('../handler/decorator-handler')
class DumpHandler extends DecoratorHandler {
#maxSize = 1024 * 1024
#abort = null
#dumped = false
#aborted = false
#size = 0
#reason = null
#handler = null
constructor ({ maxSize }, handler) {
super(handler)
if (maxSize != null && (!Number.isFinite(maxSize) || maxSize < 1)) {
throw new InvalidArgumentError('maxSize must be a number greater than 0')
}
this.#maxSize = maxSize ?? this.#maxSize
this.#handler = handler
}
onConnect (abort) {
this.#abort = abort
this.#handler.onConnect(this.#customAbort.bind(this))
}
#customAbort (reason) {
this.#aborted = true
this.#reason = reason
}
// TODO: will require adjustment after new hooks are out
onHeaders (statusCode, rawHeaders, resume, statusMessage) {
const headers = util.parseHeaders(rawHeaders)
const contentLength = headers['content-length']
if (contentLength != null && contentLength > this.#maxSize) {
throw new RequestAbortedError(
`Response size (${contentLength}) larger than maxSize (${
this.#maxSize
})`
)
}
if (this.#aborted) {
return true
}
return this.#handler.onHeaders(
statusCode,
rawHeaders,
resume,
statusMessage
)
}
onError (err) {
if (this.#dumped) {
return
}
err = this.#reason ?? err
this.#handler.onError(err)
}
onData (chunk) {
this.#size = this.#size + chunk.length
if (this.#size >= this.#maxSize) {
this.#dumped = true
if (this.#aborted) {
this.#handler.onError(this.#reason)
} else {
this.#handler.onComplete([])
}
}
return true
}
onComplete (trailers) {
if (this.#dumped) {
return
}
if (this.#aborted) {
this.#handler.onError(this.reason)
return
}
this.#handler.onComplete(trailers)
}
}
function createDumpInterceptor (
{ maxSize: defaultMaxSize } = {
maxSize: 1024 * 1024
}
) {
return dispatch => {
return function Intercept (opts, handler) {
const { dumpMaxSize = defaultMaxSize } =
opts
const dumpHandler = new DumpHandler(
{ maxSize: dumpMaxSize },
handler
)
return dispatch(opts, dumpHandler)
}
}
}
module.exports = createDumpInterceptor
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