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Diffstat (limited to 'g4f/Provider/npm/node_modules/undici/lib/fetch/index.js')
| -rw-r--r-- | g4f/Provider/npm/node_modules/undici/lib/fetch/index.js | 2145 |
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diff --git a/g4f/Provider/npm/node_modules/undici/lib/fetch/index.js b/g4f/Provider/npm/node_modules/undici/lib/fetch/index.js new file mode 100644 index 00000000..298b3ddb --- /dev/null +++ b/g4f/Provider/npm/node_modules/undici/lib/fetch/index.js @@ -0,0 +1,2145 @@ +// https://github.com/Ethan-Arrowood/undici-fetch + +'use strict' + +const { + Response, + makeNetworkError, + makeAppropriateNetworkError, + filterResponse, + makeResponse +} = require('./response') +const { Headers } = require('./headers') +const { Request, makeRequest } = require('./request') +const zlib = require('zlib') +const { + bytesMatch, + makePolicyContainer, + clonePolicyContainer, + requestBadPort, + TAOCheck, + appendRequestOriginHeader, + responseLocationURL, + requestCurrentURL, + setRequestReferrerPolicyOnRedirect, + tryUpgradeRequestToAPotentiallyTrustworthyURL, + createOpaqueTimingInfo, + appendFetchMetadata, + corsCheck, + crossOriginResourcePolicyCheck, + determineRequestsReferrer, + coarsenedSharedCurrentTime, + createDeferredPromise, + isBlobLike, + sameOrigin, + isCancelled, + isAborted, + isErrorLike, + fullyReadBody, + readableStreamClose, + isomorphicEncode, + urlIsLocal, + urlIsHttpHttpsScheme, + urlHasHttpsScheme +} = require('./util') +const { kState, kHeaders, kGuard, kRealm } = require('./symbols') +const assert = require('assert') +const { safelyExtractBody } = require('./body') +const { + redirectStatusSet, + nullBodyStatus, + safeMethodsSet, + requestBodyHeader, + subresourceSet, + DOMException +} = require('./constants') +const { kHeadersList } = require('../core/symbols') +const EE = require('events') +const { Readable, pipeline } = require('stream') +const { addAbortListener, isErrored, isReadable, nodeMajor, nodeMinor } = require('../core/util') +const { dataURLProcessor, serializeAMimeType } = require('./dataURL') +const { TransformStream } = require('stream/web') +const { getGlobalDispatcher } = require('../global') +const { webidl } = require('./webidl') +const { STATUS_CODES } = require('http') +const GET_OR_HEAD = ['GET', 'HEAD'] + +/** @type {import('buffer').resolveObjectURL} */ +let resolveObjectURL +let ReadableStream = globalThis.ReadableStream + +class Fetch extends EE { + constructor (dispatcher) { + super() + + this.dispatcher = dispatcher + this.connection = null + this.dump = false + this.state = 'ongoing' + // 2 terminated listeners get added per request, + // but only 1 gets removed. If there are 20 redirects, + // 21 listeners will be added. + // See https://github.com/nodejs/undici/issues/1711 + // TODO (fix): Find and fix root cause for leaked listener. + this.setMaxListeners(21) + } + + terminate (reason) { + if (this.state !== 'ongoing') { + return + } + + this.state = 'terminated' + this.connection?.destroy(reason) + this.emit('terminated', reason) + } + + // https://fetch.spec.whatwg.org/#fetch-controller-abort + abort (error) { + if (this.state !== 'ongoing') { + return + } + + // 1. Set controller’s state to "aborted". + this.state = 'aborted' + + // 2. Let fallbackError be an "AbortError" DOMException. + // 3. Set error to fallbackError if it is not given. + if (!error) { + error = new DOMException('The operation was aborted.', 'AbortError') + } + + // 4. Let serializedError be StructuredSerialize(error). + // If that threw an exception, catch it, and let + // serializedError be StructuredSerialize(fallbackError). + + // 5. Set controller’s serialized abort reason to serializedError. + this.serializedAbortReason = error + + this.connection?.destroy(error) + this.emit('terminated', error) + } +} + +// https://fetch.spec.whatwg.org/#fetch-method +function fetch (input, init = {}) { + webidl.argumentLengthCheck(arguments, 1, { header: 'globalThis.fetch' }) + + // 1. Let p be a new promise. + const p = createDeferredPromise() + + // 2. Let requestObject be the result of invoking the initial value of + // Request as constructor with input and init as arguments. If this throws + // an exception, reject p with it and return p. + let requestObject + + try { + requestObject = new Request(input, init) + } catch (e) { + p.reject(e) + return p.promise + } + + // 3. Let request be requestObject’s request. + const request = requestObject[kState] + + // 4. If requestObject’s signal’s aborted flag is set, then: + if (requestObject.signal.aborted) { + // 1. Abort the fetch() call with p, request, null, and + // requestObject’s signal’s abort reason. + abortFetch(p, request, null, requestObject.signal.reason) + + // 2. Return p. + return p.promise + } + + // 5. Let globalObject be request’s client’s global object. + const globalObject = request.client.globalObject + + // 6. If globalObject is a ServiceWorkerGlobalScope object, then set + // request’s service-workers mode to "none". + if (globalObject?.constructor?.name === 'ServiceWorkerGlobalScope') { + request.serviceWorkers = 'none' + } + + // 7. Let responseObject be null. + let responseObject = null + + // 8. Let relevantRealm be this’s relevant Realm. + const relevantRealm = null + + // 9. Let locallyAborted be false. + let locallyAborted = false + + // 10. Let controller be null. + let controller = null + + // 11. Add the following abort steps to requestObject’s signal: + addAbortListener( + requestObject.signal, + () => { + // 1. Set locallyAborted to true. + locallyAborted = true + + // 2. Assert: controller is non-null. + assert(controller != null) + + // 3. Abort controller with requestObject’s signal’s abort reason. + controller.abort(requestObject.signal.reason) + + // 4. Abort the fetch() call with p, request, responseObject, + // and requestObject’s signal’s abort reason. + abortFetch(p, request, responseObject, requestObject.signal.reason) + } + ) + + // 12. Let handleFetchDone given response response be to finalize and + // report timing with response, globalObject, and "fetch". + const handleFetchDone = (response) => + finalizeAndReportTiming(response, 'fetch') + + // 13. Set controller to the result of calling fetch given request, + // with processResponseEndOfBody set to handleFetchDone, and processResponse + // given response being these substeps: + + const processResponse = (response) => { + // 1. If locallyAborted is true, terminate these substeps. + if (locallyAborted) { + return Promise.resolve() + } + + // 2. If response’s aborted flag is set, then: + if (response.aborted) { + // 1. Let deserializedError be the result of deserialize a serialized + // abort reason given controller’s serialized abort reason and + // relevantRealm. + + // 2. Abort the fetch() call with p, request, responseObject, and + // deserializedError. + + abortFetch(p, request, responseObject, controller.serializedAbortReason) + return Promise.resolve() + } + + // 3. If response is a network error, then reject p with a TypeError + // and terminate these substeps. + if (response.type === 'error') { + p.reject( + Object.assign(new TypeError('fetch failed'), { cause: response.error }) + ) + return Promise.resolve() + } + + // 4. Set responseObject to the result of creating a Response object, + // given response, "immutable", and relevantRealm. + responseObject = new Response() + responseObject[kState] = response + responseObject[kRealm] = relevantRealm + responseObject[kHeaders][kHeadersList] = response.headersList + responseObject[kHeaders][kGuard] = 'immutable' + responseObject[kHeaders][kRealm] = relevantRealm + + // 5. Resolve p with responseObject. + p.resolve(responseObject) + } + + controller = fetching({ + request, + processResponseEndOfBody: handleFetchDone, + processResponse, + dispatcher: init.dispatcher ?? getGlobalDispatcher() // undici + }) + + // 14. Return p. + return p.promise +} + +// https://fetch.spec.whatwg.org/#finalize-and-report-timing +function finalizeAndReportTiming (response, initiatorType = 'other') { + // 1. If response is an aborted network error, then return. + if (response.type === 'error' && response.aborted) { + return + } + + // 2. If response’s URL list is null or empty, then return. + if (!response.urlList?.length) { + return + } + + // 3. Let originalURL be response’s URL list[0]. + const originalURL = response.urlList[0] + + // 4. Let timingInfo be response’s timing info. + let timingInfo = response.timingInfo + + // 5. Let cacheState be response’s cache state. + let cacheState = response.cacheState + + // 6. If originalURL’s scheme is not an HTTP(S) scheme, then return. + if (!urlIsHttpHttpsScheme(originalURL)) { + return + } + + // 7. If timingInfo is null, then return. + if (timingInfo === null) { + return + } + + // 8. If response’s timing allow passed flag is not set, then: + if (!timingInfo.timingAllowPassed) { + // 1. Set timingInfo to a the result of creating an opaque timing info for timingInfo. + timingInfo = createOpaqueTimingInfo({ + startTime: timingInfo.startTime + }) + + // 2. Set cacheState to the empty string. + cacheState = '' + } + + // 9. Set timingInfo’s end time to the coarsened shared current time + // given global’s relevant settings object’s cross-origin isolated + // capability. + // TODO: given global’s relevant settings object’s cross-origin isolated + // capability? + timingInfo.endTime = coarsenedSharedCurrentTime() + + // 10. Set response’s timing info to timingInfo. + response.timingInfo = timingInfo + + // 11. Mark resource timing for timingInfo, originalURL, initiatorType, + // global, and cacheState. + markResourceTiming( + timingInfo, + originalURL, + initiatorType, + globalThis, + cacheState + ) +} + +// https://w3c.github.io/resource-timing/#dfn-mark-resource-timing +function markResourceTiming (timingInfo, originalURL, initiatorType, globalThis, cacheState) { + if (nodeMajor > 18 || (nodeMajor === 18 && nodeMinor >= 2)) { + performance.markResourceTiming(timingInfo, originalURL.href, initiatorType, globalThis, cacheState) + } +} + +// https://fetch.spec.whatwg.org/#abort-fetch +function abortFetch (p, request, responseObject, error) { + // Note: AbortSignal.reason was added in node v17.2.0 + // which would give us an undefined error to reject with. + // Remove this once node v16 is no longer supported. + if (!error) { + error = new DOMException('The operation was aborted.', 'AbortError') + } + + // 1. Reject promise with error. + p.reject(error) + + // 2. If request’s body is not null and is readable, then cancel request’s + // body with error. + if (request.body != null && isReadable(request.body?.stream)) { + request.body.stream.cancel(error).catch((err) => { + if (err.code === 'ERR_INVALID_STATE') { + // Node bug? + return + } + throw err + }) + } + + // 3. If responseObject is null, then return. + if (responseObject == null) { + return + } + + // 4. Let response be responseObject’s response. + const response = responseObject[kState] + + // 5. If response’s body is not null and is readable, then error response’s + // body with error. + if (response.body != null && isReadable(response.body?.stream)) { + response.body.stream.cancel(error).catch((err) => { + if (err.code === 'ERR_INVALID_STATE') { + // Node bug? + return + } + throw err + }) + } +} + +// https://fetch.spec.whatwg.org/#fetching +function fetching ({ + request, + processRequestBodyChunkLength, + processRequestEndOfBody, + processResponse, + processResponseEndOfBody, + processResponseConsumeBody, + useParallelQueue = false, + dispatcher // undici +}) { + // 1. Let taskDestination be null. + let taskDestination = null + + // 2. Let crossOriginIsolatedCapability be false. + let crossOriginIsolatedCapability = false + + // 3. If request’s client is non-null, then: + if (request.client != null) { + // 1. Set taskDestination to request’s client’s global object. + taskDestination = request.client.globalObject + + // 2. Set crossOriginIsolatedCapability to request’s client’s cross-origin + // isolated capability. + crossOriginIsolatedCapability = + request.client.crossOriginIsolatedCapability + } + + // 4. If useParallelQueue is true, then set taskDestination to the result of + // starting a new parallel queue. + // TODO + + // 5. Let timingInfo be a new fetch timing info whose start time and + // post-redirect start time are the coarsened shared current time given + // crossOriginIsolatedCapability. + const currenTime = coarsenedSharedCurrentTime(crossOriginIsolatedCapability) + const timingInfo = createOpaqueTimingInfo({ + startTime: currenTime + }) + + // 6. Let fetchParams be a new fetch params whose + // request is request, + // timing info is timingInfo, + // process request body chunk length is processRequestBodyChunkLength, + // process request end-of-body is processRequestEndOfBody, + // process response is processResponse, + // process response consume body is processResponseConsumeBody, + // process response end-of-body is processResponseEndOfBody, + // task destination is taskDestination, + // and cross-origin isolated capability is crossOriginIsolatedCapability. + const fetchParams = { + controller: new Fetch(dispatcher), + request, + timingInfo, + processRequestBodyChunkLength, + processRequestEndOfBody, + processResponse, + processResponseConsumeBody, + processResponseEndOfBody, + taskDestination, + crossOriginIsolatedCapability + } + + // 7. If request’s body is a byte sequence, then set request’s body to + // request’s body as a body. + // NOTE: Since fetching is only called from fetch, body should already be + // extracted. + assert(!request.body || request.body.stream) + + // 8. If request’s window is "client", then set request’s window to request’s + // client, if request’s client’s global object is a Window object; otherwise + // "no-window". + if (request.window === 'client') { + // TODO: What if request.client is null? + request.window = + request.client?.globalObject?.constructor?.name === 'Window' + ? request.client + : 'no-window' + } + + // 9. If request’s origin is "client", then set request’s origin to request’s + // client’s origin. + if (request.origin === 'client') { + // TODO: What if request.client is null? + request.origin = request.client?.origin + } + + // 10. If all of the following conditions are true: + // TODO + + // 11. If request’s policy container is "client", then: + if (request.policyContainer === 'client') { + // 1. If request’s client is non-null, then set request’s policy + // container to a clone of request’s client’s policy container. [HTML] + if (request.client != null) { + request.policyContainer = clonePolicyContainer( + request.client.policyContainer + ) + } else { + // 2. Otherwise, set request’s policy container to a new policy + // container. + request.policyContainer = makePolicyContainer() + } + } + + // 12. If request’s header list does not contain `Accept`, then: + if (!request.headersList.contains('accept')) { + // 1. Let value be `*/*`. + const value = '*/*' + + // 2. A user agent should set value to the first matching statement, if + // any, switching on request’s destination: + // "document" + // "frame" + // "iframe" + // `text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8` + // "image" + // `image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5` + // "style" + // `text/css,*/*;q=0.1` + // TODO + + // 3. Append `Accept`/value to request’s header list. + request.headersList.append('accept', value) + } + + // 13. If request’s header list does not contain `Accept-Language`, then + // user agents should append `Accept-Language`/an appropriate value to + // request’s header list. + if (!request.headersList.contains('accept-language')) { + request.headersList.append('accept-language', '*') + } + + // 14. If request’s priority is null, then use request’s initiator and + // destination appropriately in setting request’s priority to a + // user-agent-defined object. + if (request.priority === null) { + // TODO + } + + // 15. If request is a subresource request, then: + if (subresourceSet.has(request.destination)) { + // TODO + } + + // 16. Run main fetch given fetchParams. + mainFetch(fetchParams) + .catch(err => { + fetchParams.controller.terminate(err) + }) + + // 17. Return fetchParam's controller + return fetchParams.controller +} + +// https://fetch.spec.whatwg.org/#concept-main-fetch +async function mainFetch (fetchParams, recursive = false) { + // 1. Let request be fetchParams’s request. + const request = fetchParams.request + + // 2. Let response be null. + let response = null + + // 3. If request’s local-URLs-only flag is set and request’s current URL is + // not local, then set response to a network error. + if (request.localURLsOnly && !urlIsLocal(requestCurrentURL(request))) { + response = makeNetworkError('local URLs only') + } + + // 4. Run report Content Security Policy violations for request. + // TODO + + // 5. Upgrade request to a potentially trustworthy URL, if appropriate. + tryUpgradeRequestToAPotentiallyTrustworthyURL(request) + + // 6. If should request be blocked due to a bad port, should fetching request + // be blocked as mixed content, or should request be blocked by Content + // Security Policy returns blocked, then set response to a network error. + if (requestBadPort(request) === 'blocked') { + response = makeNetworkError('bad port') + } + // TODO: should fetching request be blocked as mixed content? + // TODO: should request be blocked by Content Security Policy? + + // 7. If request’s referrer policy is the empty string, then set request’s + // referrer policy to request’s policy container’s referrer policy. + if (request.referrerPolicy === '') { + request.referrerPolicy = request.policyContainer.referrerPolicy + } + + // 8. If request’s referrer is not "no-referrer", then set request’s + // referrer to the result of invoking determine request’s referrer. + if (request.referrer !== 'no-referrer') { + request.referrer = determineRequestsReferrer(request) + } + + // 9. Set request’s current URL’s scheme to "https" if all of the following + // conditions are true: + // - request’s current URL’s scheme is "http" + // - request’s current URL’s host is a domain + // - Matching request’s current URL’s host per Known HSTS Host Domain Name + // Matching results in either a superdomain match with an asserted + // includeSubDomains directive or a congruent match (with or without an + // asserted includeSubDomains directive). [HSTS] + // TODO + + // 10. If recursive is false, then run the remaining steps in parallel. + // TODO + + // 11. If response is null, then set response to the result of running + // the steps corresponding to the first matching statement: + if (response === null) { + response = await (async () => { + const currentURL = requestCurrentURL(request) + + if ( + // - request’s current URL’s origin is same origin with request’s origin, + // and request’s response tainting is "basic" + (sameOrigin(currentURL, request.url) && request.responseTainting === 'basic') || + // request’s current URL’s scheme is "data" + (currentURL.protocol === 'data:') || + // - request’s mode is "navigate" or "websocket" + (request.mode === 'navigate' || request.mode === 'websocket') + ) { + // 1. Set request’s response tainting to "basic". + request.responseTainting = 'basic' + + // 2. Return the result of running scheme fetch given fetchParams. + return await schemeFetch(fetchParams) + } + + // request’s mode is "same-origin" + if (request.mode === 'same-origin') { + // 1. Return a network error. + return makeNetworkError('request mode cannot be "same-origin"') + } + + // request’s mode is "no-cors" + if (request.mode === 'no-cors') { + // 1. If request’s redirect mode is not "follow", then return a network + // error. + if (request.redirect !== 'follow') { + return makeNetworkError( + 'redirect mode cannot be "follow" for "no-cors" request' + ) + } + + // 2. Set request’s response tainting to "opaque". + request.responseTainting = 'opaque' + + // 3. Return the result of running scheme fetch given fetchParams. + return await schemeFetch(fetchParams) + } + + // request’s current URL’s scheme is not an HTTP(S) scheme + if (!urlIsHttpHttpsScheme(requestCurrentURL(request))) { + // Return a network error. + return makeNetworkError('URL scheme must be a HTTP(S) scheme') + } + + // - request’s use-CORS-preflight flag is set + // - request’s unsafe-request flag is set and either request’s method is + // not a CORS-safelisted method or CORS-unsafe request-header names with + // request’s header list is not empty + // 1. Set request’s response tainting to "cors". + // 2. Let corsWithPreflightResponse be the result of running HTTP fetch + // given fetchParams and true. + // 3. If corsWithPreflightResponse is a network error, then clear cache + // entries using request. + // 4. Return corsWithPreflightResponse. + // TODO + + // Otherwise + // 1. Set request’s response tainting to "cors". + request.responseTainting = 'cors' + + // 2. Return the result of running HTTP fetch given fetchParams. + return await httpFetch(fetchParams) + })() + } + + // 12. If recursive is true, then return response. + if (recursive) { + return response + } + + // 13. If response is not a network error and response is not a filtered + // response, then: + if (response.status !== 0 && !response.internalResponse) { + // If request’s response tainting is "cors", then: + if (request.responseTainting === 'cors') { + // 1. Let headerNames be the result of extracting header list values + // given `Access-Control-Expose-Headers` and response’s header list. + // TODO + // 2. If request’s credentials mode is not "include" and headerNames + // contains `*`, then set response’s CORS-exposed header-name list to + // all unique header names in response’s header list. + // TODO + // 3. Otherwise, if headerNames is not null or failure, then set + // response’s CORS-exposed header-name list to headerNames. + // TODO + } + + // Set response to the following filtered response with response as its + // internal response, depending on request’s response tainting: + if (request.responseTainting === 'basic') { + response = filterResponse(response, 'basic') + } else if (request.responseTainting === 'cors') { + response = filterResponse(response, 'cors') + } else if (request.responseTainting === 'opaque') { + response = filterResponse(response, 'opaque') + } else { + assert(false) + } + } + + // 14. Let internalResponse be response, if response is a network error, + // and response’s internal response otherwise. + let internalResponse = + response.status === 0 ? response : response.internalResponse + + // 15. If internalResponse’s URL list is empty, then set it to a clone of + // request’s URL list. + if (internalResponse.urlList.length === 0) { + internalResponse.urlList.push(...request.urlList) + } + + // 16. If request’s timing allow failed flag is unset, then set + // internalResponse’s timing allow passed flag. + if (!request.timingAllowFailed) { + response.timingAllowPassed = true + } + + // 17. If response is not a network error and any of the following returns + // blocked + // - should internalResponse to request be blocked as mixed content + // - should internalResponse to request be blocked by Content Security Policy + // - should internalResponse to request be blocked due to its MIME type + // - should internalResponse to request be blocked due to nosniff + // TODO + + // 18. If response’s type is "opaque", internalResponse’s status is 206, + // internalResponse’s range-requested flag is set, and request’s header + // list does not contain `Range`, then set response and internalResponse + // to a network error. + if ( + response.type === 'opaque' && + internalResponse.status === 206 && + internalResponse.rangeRequested && + !request.headers.contains('range') + ) { + response = internalResponse = makeNetworkError() + } + + // 19. If response is not a network error and either request’s method is + // `HEAD` or `CONNECT`, or internalResponse’s status is a null body status, + // set internalResponse’s body to null and disregard any enqueuing toward + // it (if any). + if ( + response.status !== 0 && + (request.method === 'HEAD' || + request.method === 'CONNECT' || + nullBodyStatus.includes(internalResponse.status)) + ) { + internalResponse.body = null + fetchParams.controller.dump = true + } + + // 20. If request’s integrity metadata is not the empty string, then: + if (request.integrity) { + // 1. Let processBodyError be this step: run fetch finale given fetchParams + // and a network error. + const processBodyError = (reason) => + fetchFinale(fetchParams, makeNetworkError(reason)) + + // 2. If request’s response tainting is "opaque", or response’s body is null, + // then run processBodyError and abort these steps. + if (request.responseTainting === 'opaque' || response.body == null) { + processBodyError(response.error) + return + } + + // 3. Let processBody given bytes be these steps: + const processBody = (bytes) => { + // 1. If bytes do not match request’s integrity metadata, + // then run processBodyError and abort these steps. [SRI] + if (!bytesMatch(bytes, request.integrity)) { + processBodyError('integrity mismatch') + return + } + + // 2. Set response’s body to bytes as a body. + response.body = safelyExtractBody(bytes)[0] + + // 3. Run fetch finale given fetchParams and response. + fetchFinale(fetchParams, response) + } + + // 4. Fully read response’s body given processBody and processBodyError. + await fullyReadBody(response.body, processBody, processBodyError) + } else { + // 21. Otherwise, run fetch finale given fetchParams and response. + fetchFinale(fetchParams, response) + } +} + +// https://fetch.spec.whatwg.org/#concept-scheme-fetch +// given a fetch params fetchParams +function schemeFetch (fetchParams) { + // Note: since the connection is destroyed on redirect, which sets fetchParams to a + // cancelled state, we do not want this condition to trigger *unless* there have been + // no redirects. See https://github.com/nodejs/undici/issues/1776 + // 1. If fetchParams is canceled, then return the appropriate network error for fetchParams. + if (isCancelled(fetchParams) && fetchParams.request.redirectCount === 0) { + return Promise.resolve(makeAppropriateNetworkError(fetchParams)) + } + + // 2. Let request be fetchParams’s request. + const { request } = fetchParams + + const { protocol: scheme } = requestCurrentURL(request) + + // 3. Switch on request’s current URL’s scheme and run the associated steps: + switch (scheme) { + case 'about:': { + // If request’s current URL’s path is the string "blank", then return a new response + // whose status message is `OK`, header list is « (`Content-Type`, `text/html;charset=utf-8`) », + // and body is the empty byte sequence as a body. + + // Otherwise, return a network error. + return Promise.resolve(makeNetworkError('about scheme is not supported')) + } + case 'blob:': { + if (!resolveObjectURL) { + resolveObjectURL = require('buffer').resolveObjectURL + } + + // 1. Let blobURLEntry be request’s current URL’s blob URL entry. + const blobURLEntry = requestCurrentURL(request) + + // https://github.com/web-platform-tests/wpt/blob/7b0ebaccc62b566a1965396e5be7bb2bc06f841f/FileAPI/url/resources/fetch-tests.js#L52-L56 + // Buffer.resolveObjectURL does not ignore URL queries. + if (blobURLEntry.search.length !== 0) { + return Promise.resolve(makeNetworkError('NetworkError when attempting to fetch resource.')) + } + + const blobURLEntryObject = resolveObjectURL(blobURLEntry.toString()) + + // 2. If request’s method is not `GET`, blobURLEntry is null, or blobURLEntry’s + // object is not a Blob object, then return a network error. + if (request.method !== 'GET' || !isBlobLike(blobURLEntryObject)) { + return Promise.resolve(makeNetworkError('invalid method')) + } + + // 3. Let bodyWithType be the result of safely extracting blobURLEntry’s object. + const bodyWithType = safelyExtractBody(blobURLEntryObject) + + // 4. Let body be bodyWithType’s body. + const body = bodyWithType[0] + + // 5. Let length be body’s length, serialized and isomorphic encoded. + const length = isomorphicEncode(`${body.length}`) + + // 6. Let type be bodyWithType’s type if it is non-null; otherwise the empty byte sequence. + const type = bodyWithType[1] ?? '' + + // 7. Return a new response whose status message is `OK`, header list is + // « (`Content-Length`, length), (`Content-Type`, type) », and body is body. + const response = makeResponse({ + statusText: 'OK', + headersList: [ + ['content-length', { name: 'Content-Length', value: length }], + ['content-type', { name: 'Content-Type', value: type }] + ] + }) + + response.body = body + + return Promise.resolve(response) + } + case 'data:': { + // 1. Let dataURLStruct be the result of running the + // data: URL processor on request’s current URL. + const currentURL = requestCurrentURL(request) + const dataURLStruct = dataURLProcessor(currentURL) + + // 2. If dataURLStruct is failure, then return a + // network error. + if (dataURLStruct === 'failure') { + return Promise.resolve(makeNetworkError('failed to fetch the data URL')) + } + + // 3. Let mimeType be dataURLStruct’s MIME type, serialized. + const mimeType = serializeAMimeType(dataURLStruct.mimeType) + + // 4. Return a response whose status message is `OK`, + // header list is « (`Content-Type`, mimeType) », + // and body is dataURLStruct’s body as a body. + return Promise.resolve(makeResponse({ + statusText: 'OK', + headersList: [ + ['content-type', { name: 'Content-Type', value: mimeType }] + ], + body: safelyExtractBody(dataURLStruct.body)[0] + })) + } + case 'file:': { + // For now, unfortunate as it is, file URLs are left as an exercise for the reader. + // When in doubt, return a network error. + return Promise.resolve(makeNetworkError('not implemented... yet...')) + } + case 'http:': + case 'https:': { + // Return the result of running HTTP fetch given fetchParams. + + return httpFetch(fetchParams) + .catch((err) => makeNetworkError(err)) + } + default: { + return Promise.resolve(makeNetworkError('unknown scheme')) + } + } +} + +// https://fetch.spec.whatwg.org/#finalize-response +function finalizeResponse (fetchParams, response) { + // 1. Set fetchParams’s request’s done flag. + fetchParams.request.done = true + + // 2, If fetchParams’s process response done is not null, then queue a fetch + // task to run fetchParams’s process response done given response, with + // fetchParams’s task destination. + if (fetchParams.processResponseDone != null) { + queueMicrotask(() => fetchParams.processResponseDone(response)) + } +} + +// https://fetch.spec.whatwg.org/#fetch-finale +function fetchFinale (fetchParams, response) { + // 1. If response is a network error, then: + if (response.type === 'error') { + // 1. Set response’s URL list to « fetchParams’s request’s URL list[0] ». + response.urlList = [fetchParams.request.urlList[0]] + + // 2. Set response’s timing info to the result of creating an opaque timing + // info for fetchParams’s timing info. + response.timingInfo = createOpaqueTimingInfo({ + startTime: fetchParams.timingInfo.startTime + }) + } + + // 2. Let processResponseEndOfBody be the following steps: + const processResponseEndOfBody = () => { + // 1. Set fetchParams’s request’s done flag. + fetchParams.request.done = true + + // If fetchParams’s process response end-of-body is not null, + // then queue a fetch task to run fetchParams’s process response + // end-of-body given response with fetchParams’s task destination. + if (fetchParams.processResponseEndOfBody != null) { + queueMicrotask(() => fetchParams.processResponseEndOfBody(response)) + } + } + + // 3. If fetchParams’s process response is non-null, then queue a fetch task + // to run fetchParams’s process response given response, with fetchParams’s + // task destination. + if (fetchParams.processResponse != null) { + queueMicrotask(() => fetchParams.processResponse(response)) + } + + // 4. If response’s body is null, then run processResponseEndOfBody. + if (response.body == null) { + processResponseEndOfBody() + } else { + // 5. Otherwise: + + // 1. Let transformStream be a new a TransformStream. + + // 2. Let identityTransformAlgorithm be an algorithm which, given chunk, + // enqueues chunk in transformStream. + const identityTransformAlgorithm = (chunk, controller) => { + controller.enqueue(chunk) + } + + // 3. Set up transformStream with transformAlgorithm set to identityTransformAlgorithm + // and flushAlgorithm set to processResponseEndOfBody. + const transformStream = new TransformStream({ + start () {}, + transform: identityTransformAlgorithm, + flush: processResponseEndOfBody + }, { + size () { + return 1 + } + }, { + size () { + return 1 + } + }) + + // 4. Set response’s body to the result of piping response’s body through transformStream. + response.body = { stream: response.body.stream.pipeThrough(transformStream) } + } + + // 6. If fetchParams’s process response consume body is non-null, then: + if (fetchParams.processResponseConsumeBody != null) { + // 1. Let processBody given nullOrBytes be this step: run fetchParams’s + // process response consume body given response and nullOrBytes. + const processBody = (nullOrBytes) => fetchParams.processResponseConsumeBody(response, nullOrBytes) + + // 2. Let processBodyError be this step: run fetchParams’s process + // response consume body given response and failure. + const processBodyError = (failure) => fetchParams.processResponseConsumeBody(response, failure) + + // 3. If response’s body is null, then queue a fetch task to run processBody + // given null, with fetchParams’s task destination. + if (response.body == null) { + queueMicrotask(() => processBody(null)) + } else { + // 4. Otherwise, fully read response’s body given processBody, processBodyError, + // and fetchParams’s task destination. + return fullyReadBody(response.body, processBody, processBodyError) + } + return Promise.resolve() + } +} + +// https://fetch.spec.whatwg.org/#http-fetch +async function httpFetch (fetchParams) { + // 1. Let request be fetchParams’s request. + const request = fetchParams.request + + // 2. Let response be null. + let response = null + + // 3. Let actualResponse be null. + let actualResponse = null + + // 4. Let timingInfo be fetchParams’s timing info. + const timingInfo = fetchParams.timingInfo + + // 5. If request’s service-workers mode is "all", then: + if (request.serviceWorkers === 'all') { + // TODO + } + + // 6. If response is null, then: + if (response === null) { + // 1. If makeCORSPreflight is true and one of these conditions is true: + // TODO + + // 2. If request’s redirect mode is "follow", then set request’s + // service-workers mode to "none". + if (request.redirect === 'follow') { + request.serviceWorkers = 'none' + } + + // 3. Set response and actualResponse to the result of running + // HTTP-network-or-cache fetch given fetchParams. + actualResponse = response = await httpNetworkOrCacheFetch(fetchParams) + + // 4. If request’s response tainting is "cors" and a CORS check + // for request and response returns failure, then return a network error. + if ( + request.responseTainting === 'cors' && + corsCheck(request, response) === 'failure' + ) { + return makeNetworkError('cors failure') + } + + // 5. If the TAO check for request and response returns failure, then set + // request’s timing allow failed flag. + if (TAOCheck(request, response) === 'failure') { + request.timingAllowFailed = true + } + } + + // 7. If either request’s response tainting or response’s type + // is "opaque", and the cross-origin resource policy check with + // request’s origin, request’s client, request’s destination, + // and actualResponse returns blocked, then return a network error. + if ( + (request.responseTainting === 'opaque' || response.type === 'opaque') && + crossOriginResourcePolicyCheck( + request.origin, + request.client, + request.destination, + actualResponse + ) === 'blocked' + ) { + return makeNetworkError('blocked') + } + + // 8. If actualResponse’s status is a redirect status, then: + if (redirectStatusSet.has(actualResponse.status)) { + // 1. If actualResponse’s status is not 303, request’s body is not null, + // and the connection uses HTTP/2, then user agents may, and are even + // encouraged to, transmit an RST_STREAM frame. + // See, https://github.com/whatwg/fetch/issues/1288 + if (request.redirect !== 'manual') { + fetchParams.controller.connection.destroy() + } + + // 2. Switch on request’s redirect mode: + if (request.redirect === 'error') { + // Set response to a network error. + response = makeNetworkError('unexpected redirect') + } else if (request.redirect === 'manual') { + // Set response to an opaque-redirect filtered response whose internal + // response is actualResponse. + // NOTE(spec): On the web this would return an `opaqueredirect` response, + // but that doesn't make sense server side. + // See https://github.com/nodejs/undici/issues/1193. + response = actualResponse + } else if (request.redirect === 'follow') { + // Set response to the result of running HTTP-redirect fetch given + // fetchParams and response. + response = await httpRedirectFetch(fetchParams, response) + } else { + assert(false) + } + } + + // 9. Set response’s timing info to timingInfo. + response.timingInfo = timingInfo + + // 10. Return response. + return response +} + +// https://fetch.spec.whatwg.org/#http-redirect-fetch +function httpRedirectFetch (fetchParams, response) { + // 1. Let request be fetchParams’s request. + const request = fetchParams.request + + // 2. Let actualResponse be response, if response is not a filtered response, + // and response’s internal response otherwise. + const actualResponse = response.internalResponse + ? response.internalResponse + : response + + // 3. Let locationURL be actualResponse’s location URL given request’s current + // URL’s fragment. + let locationURL + + try { + locationURL = responseLocationURL( + actualResponse, + requestCurrentURL(request).hash + ) + + // 4. If locationURL is null, then return response. + if (locationURL == null) { + return response + } + } catch (err) { + // 5. If locationURL is failure, then return a network error. + return Promise.resolve(makeNetworkError(err)) + } + + // 6. If locationURL’s scheme is not an HTTP(S) scheme, then return a network + // error. + if (!urlIsHttpHttpsScheme(locationURL)) { + return Promise.resolve(makeNetworkError('URL scheme must be a HTTP(S) scheme')) + } + + // 7. If request’s redirect count is 20, then return a network error. + if (request.redirectCount === 20) { + return Promise.resolve(makeNetworkError('redirect count exceeded')) + } + + // 8. Increase request’s redirect count by 1. + request.redirectCount += 1 + + // 9. If request’s mode is "cors", locationURL includes credentials, and + // request’s origin is not same origin with locationURL’s origin, then return + // a network error. + if ( + request.mode === 'cors' && + (locationURL.username || locationURL.password) && + !sameOrigin(request, locationURL) + ) { + return Promise.resolve(makeNetworkError('cross origin not allowed for request mode "cors"')) + } + + // 10. If request’s response tainting is "cors" and locationURL includes + // credentials, then return a network error. + if ( + request.responseTainting === 'cors' && + (locationURL.username || locationURL.password) + ) { + return Promise.resolve(makeNetworkError( + 'URL cannot contain credentials for request mode "cors"' + )) + } + + // 11. If actualResponse’s status is not 303, request’s body is non-null, + // and request’s body’s source is null, then return a network error. + if ( + actualResponse.status !== 303 && + request.body != null && + request.body.source == null + ) { + return Promise.resolve(makeNetworkError()) + } + + // 12. If one of the following is true + // - actualResponse’s status is 301 or 302 and request’s method is `POST` + // - actualResponse’s status is 303 and request’s method is not `GET` or `HEAD` + if ( + ([301, 302].includes(actualResponse.status) && request.method === 'POST') || + (actualResponse.status === 303 && + !GET_OR_HEAD.includes(request.method)) + ) { + // then: + // 1. Set request’s method to `GET` and request’s body to null. + request.method = 'GET' + request.body = null + + // 2. For each headerName of request-body-header name, delete headerName from + // request’s header list. + for (const headerName of requestBodyHeader) { + request.headersList.delete(headerName) + } + } + + // 13. If request’s current URL’s origin is not same origin with locationURL’s + // origin, then for each headerName of CORS non-wildcard request-header name, + // delete headerName from request’s header list. + if (!sameOrigin(requestCurrentURL(request), locationURL)) { + // https://fetch.spec.whatwg.org/#cors-non-wildcard-request-header-name + request.headersList.delete('authorization') + + // "Cookie" and "Host" are forbidden request-headers, which undici doesn't implement. + request.headersList.delete('cookie') + request.headersList.delete('host') + } + + // 14. If request’s body is non-null, then set request’s body to the first return + // value of safely extracting request’s body’s source. + if (request.body != null) { + assert(request.body.source != null) + request.body = safelyExtractBody(request.body.source)[0] + } + + // 15. Let timingInfo be fetchParams’s timing info. + const timingInfo = fetchParams.timingInfo + + // 16. Set timingInfo’s redirect end time and post-redirect start time to the + // coarsened shared current time given fetchParams’s cross-origin isolated + // capability. + timingInfo.redirectEndTime = timingInfo.postRedirectStartTime = + coarsenedSharedCurrentTime(fetchParams.crossOriginIsolatedCapability) + + // 17. If timingInfo’s redirect start time is 0, then set timingInfo’s + // redirect start time to timingInfo’s start time. + if (timingInfo.redirectStartTime === 0) { + timingInfo.redirectStartTime = timingInfo.startTime + } + + // 18. Append locationURL to request’s URL list. + request.urlList.push(locationURL) + + // 19. Invoke set request’s referrer policy on redirect on request and + // actualResponse. + setRequestReferrerPolicyOnRedirect(request, actualResponse) + + // 20. Return the result of running main fetch given fetchParams and true. + return mainFetch(fetchParams, true) +} + +// https://fetch.spec.whatwg.org/#http-network-or-cache-fetch +async function httpNetworkOrCacheFetch ( + fetchParams, + isAuthenticationFetch = false, + isNewConnectionFetch = false +) { + // 1. Let request be fetchParams’s request. + const request = fetchParams.request + + // 2. Let httpFetchParams be null. + let httpFetchParams = null + + // 3. Let httpRequest be null. + let httpRequest = null + + // 4. Let response be null. + let response = null + + // 5. Let storedResponse be null. + // TODO: cache + + // 6. Let httpCache be null. + const httpCache = null + + // 7. Let the revalidatingFlag be unset. + const revalidatingFlag = false + + // 8. Run these steps, but abort when the ongoing fetch is terminated: + + // 1. If request’s window is "no-window" and request’s redirect mode is + // "error", then set httpFetchParams to fetchParams and httpRequest to + // request. + if (request.window === 'no-window' && request.redirect === 'error') { + httpFetchParams = fetchParams + httpRequest = request + } else { + // Otherwise: + + // 1. Set httpRequest to a clone of request. + httpRequest = makeRequest(request) + + // 2. Set httpFetchParams to a copy of fetchParams. + httpFetchParams = { ...fetchParams } + + // 3. Set httpFetchParams’s request to httpRequest. + httpFetchParams.request = httpRequest + } + + // 3. Let includeCredentials be true if one of + const includeCredentials = + request.credentials === 'include' || + (request.credentials === 'same-origin' && + request.responseTainting === 'basic') + + // 4. Let contentLength be httpRequest’s body’s length, if httpRequest’s + // body is non-null; otherwise null. + const contentLength = httpRequest.body ? httpRequest.body.length : null + + // 5. Let contentLengthHeaderValue be null. + let contentLengthHeaderValue = null + + // 6. If httpRequest’s body is null and httpRequest’s method is `POST` or + // `PUT`, then set contentLengthHeaderValue to `0`. + if ( + httpRequest.body == null && + ['POST', 'PUT'].includes(httpRequest.method) + ) { + contentLengthHeaderValue = '0' + } + + // 7. If contentLength is non-null, then set contentLengthHeaderValue to + // contentLength, serialized and isomorphic encoded. + if (contentLength != null) { + contentLengthHeaderValue = isomorphicEncode(`${contentLength}`) + } + + // 8. If contentLengthHeaderValue is non-null, then append + // `Content-Length`/contentLengthHeaderValue to httpRequest’s header + // list. + if (contentLengthHeaderValue != null) { + httpRequest.headersList.append('content-length', contentLengthHeaderValue) + } + + // 9. If contentLengthHeaderValue is non-null, then append (`Content-Length`, + // contentLengthHeaderValue) to httpRequest’s header list. + + // 10. If contentLength is non-null and httpRequest’s keepalive is true, + // then: + if (contentLength != null && httpRequest.keepalive) { + // NOTE: keepalive is a noop outside of browser context. + } + + // 11. If httpRequest’s referrer is a URL, then append + // `Referer`/httpRequest’s referrer, serialized and isomorphic encoded, + // to httpRequest’s header list. + if (httpRequest.referrer instanceof URL) { + httpRequest.headersList.append('referer', isomorphicEncode(httpRequest.referrer.href)) + } + + // 12. Append a request `Origin` header for httpRequest. + appendRequestOriginHeader(httpRequest) + + // 13. Append the Fetch metadata headers for httpRequest. [FETCH-METADATA] + appendFetchMetadata(httpRequest) + + // 14. If httpRequest’s header list does not contain `User-Agent`, then + // user agents should append `User-Agent`/default `User-Agent` value to + // httpRequest’s header list. + if (!httpRequest.headersList.contains('user-agent')) { + httpRequest.headersList.append('user-agent', typeof esbuildDetection === 'undefined' ? 'undici' : 'node') + } + + // 15. If httpRequest’s cache mode is "default" and httpRequest’s header + // list contains `If-Modified-Since`, `If-None-Match`, + // `If-Unmodified-Since`, `If-Match`, or `If-Range`, then set + // httpRequest’s cache mode to "no-store". + if ( + httpRequest.cache === 'default' && + (httpRequest.headersList.contains('if-modified-since') || + httpRequest.headersList.contains('if-none-match') || + httpRequest.headersList.contains('if-unmodified-since') || + httpRequest.headersList.contains('if-match') || + httpRequest.headersList.contains('if-range')) + ) { + httpRequest.cache = 'no-store' + } + + // 16. If httpRequest’s cache mode is "no-cache", httpRequest’s prevent + // no-cache cache-control header modification flag is unset, and + // httpRequest’s header list does not contain `Cache-Control`, then append + // `Cache-Control`/`max-age=0` to httpRequest’s header list. + if ( + httpRequest.cache === 'no-cache' && + !httpRequest.preventNoCacheCacheControlHeaderModification && + !httpRequest.headersList.contains('cache-control') + ) { + httpRequest.headersList.append('cache-control', 'max-age=0') + } + + // 17. If httpRequest’s cache mode is "no-store" or "reload", then: + if (httpRequest.cache === 'no-store' || httpRequest.cache === 'reload') { + // 1. If httpRequest’s header list does not contain `Pragma`, then append + // `Pragma`/`no-cache` to httpRequest’s header list. + if (!httpRequest.headersList.contains('pragma')) { + httpRequest.headersList.append('pragma', 'no-cache') + } + + // 2. If httpRequest’s header list does not contain `Cache-Control`, + // then append `Cache-Control`/`no-cache` to httpRequest’s header list. + if (!httpRequest.headersList.contains('cache-control')) { + httpRequest.headersList.append('cache-control', 'no-cache') + } + } + + // 18. If httpRequest’s header list contains `Range`, then append + // `Accept-Encoding`/`identity` to httpRequest’s header list. + if (httpRequest.headersList.contains('range')) { + httpRequest.headersList.append('accept-encoding', 'identity') + } + + // 19. Modify httpRequest’s header list per HTTP. Do not append a given + // header if httpRequest’s header list contains that header’s name. + // TODO: https://github.com/whatwg/fetch/issues/1285#issuecomment-896560129 + if (!httpRequest.headersList.contains('accept-encoding')) { + if (urlHasHttpsScheme(requestCurrentURL(httpRequest))) { + httpRequest.headersList.append('accept-encoding', 'br, gzip, deflate') + } else { + httpRequest.headersList.append('accept-encoding', 'gzip, deflate') + } + } + + httpRequest.headersList.delete('host') + + // 20. If includeCredentials is true, then: + if (includeCredentials) { + // 1. If the user agent is not configured to block cookies for httpRequest + // (see section 7 of [COOKIES]), then: + // TODO: credentials + // 2. If httpRequest’s header list does not contain `Authorization`, then: + // TODO: credentials + } + + // 21. If there’s a proxy-authentication entry, use it as appropriate. + // TODO: proxy-authentication + + // 22. Set httpCache to the result of determining the HTTP cache + // partition, given httpRequest. + // TODO: cache + + // 23. If httpCache is null, then set httpRequest’s cache mode to + // "no-store". + if (httpCache == null) { + httpRequest.cache = 'no-store' + } + + // 24. If httpRequest’s cache mode is neither "no-store" nor "reload", + // then: + if (httpRequest.mode !== 'no-store' && httpRequest.mode !== 'reload') { + // TODO: cache + } + + // 9. If aborted, then return the appropriate network error for fetchParams. + // TODO + + // 10. If response is null, then: + if (response == null) { + // 1. If httpRequest’s cache mode is "only-if-cached", then return a + // network error. + if (httpRequest.mode === 'only-if-cached') { + return makeNetworkError('only if cached') + } + + // 2. Let forwardResponse be the result of running HTTP-network fetch + // given httpFetchParams, includeCredentials, and isNewConnectionFetch. + const forwardResponse = await httpNetworkFetch( + httpFetchParams, + includeCredentials, + isNewConnectionFetch + ) + + // 3. If httpRequest’s method is unsafe and forwardResponse’s status is + // in the range 200 to 399, inclusive, invalidate appropriate stored + // responses in httpCache, as per the "Invalidation" chapter of HTTP + // Caching, and set storedResponse to null. [HTTP-CACHING] + if ( + !safeMethodsSet.has(httpRequest.method) && + forwardResponse.status >= 200 && + forwardResponse.status <= 399 + ) { + // TODO: cache + } + + // 4. If the revalidatingFlag is set and forwardResponse’s status is 304, + // then: + if (revalidatingFlag && forwardResponse.status === 304) { + // TODO: cache + } + + // 5. If response is null, then: + if (response == null) { + // 1. Set response to forwardResponse. + response = forwardResponse + + // 2. Store httpRequest and forwardResponse in httpCache, as per the + // "Storing Responses in Caches" chapter of HTTP Caching. [HTTP-CACHING] + // TODO: cache + } + } + + // 11. Set response’s URL list to a clone of httpRequest’s URL list. + response.urlList = [...httpRequest.urlList] + + // 12. If httpRequest’s header list contains `Range`, then set response’s + // range-requested flag. + if (httpRequest.headersList.contains('range')) { + response.rangeRequested = true + } + + // 13. Set response’s request-includes-credentials to includeCredentials. + response.requestIncludesCredentials = includeCredentials + + // 14. If response’s status is 401, httpRequest’s response tainting is not + // "cors", includeCredentials is true, and request’s window is an environment + // settings object, then: + // TODO + + // 15. If response’s status is 407, then: + if (response.status === 407) { + // 1. If request’s window is "no-window", then return a network error. + if (request.window === 'no-window') { + return makeNetworkError() + } + + // 2. ??? + + // 3. If fetchParams is canceled, then return the appropriate network error for fetchParams. + if (isCancelled(fetchParams)) { + return makeAppropriateNetworkError(fetchParams) + } + + // 4. Prompt the end user as appropriate in request’s window and store + // the result as a proxy-authentication entry. [HTTP-AUTH] + // TODO: Invoke some kind of callback? + + // 5. Set response to the result of running HTTP-network-or-cache fetch given + // fetchParams. + // TODO + return makeNetworkError('proxy authentication required') + } + + // 16. If all of the following are true + if ( + // response’s status is 421 + response.status === 421 && + // isNewConnectionFetch is false + !isNewConnectionFetch && + // request’s body is null, or request’s body is non-null and request’s body’s source is non-null + (request.body == null || request.body.source != null) + ) { + // then: + + // 1. If fetchParams is canceled, then return the appropriate network error for fetchParams. + if (isCancelled(fetchParams)) { + return makeAppropriateNetworkError(fetchParams) + } + + // 2. Set response to the result of running HTTP-network-or-cache + // fetch given fetchParams, isAuthenticationFetch, and true. + + // TODO (spec): The spec doesn't specify this but we need to cancel + // the active response before we can start a new one. + // https://github.com/whatwg/fetch/issues/1293 + fetchParams.controller.connection.destroy() + + response = await httpNetworkOrCacheFetch( + fetchParams, + isAuthenticationFetch, + true + ) + } + + // 17. If isAuthenticationFetch is true, then create an authentication entry + if (isAuthenticationFetch) { + // TODO + } + + // 18. Return response. + return response +} + +// https://fetch.spec.whatwg.org/#http-network-fetch +async function httpNetworkFetch ( + fetchParams, + includeCredentials = false, + forceNewConnection = false +) { + assert(!fetchParams.controller.connection || fetchParams.controller.connection.destroyed) + + fetchParams.controller.connection = { + abort: null, + destroyed: false, + destroy (err) { + if (!this.destroyed) { + this.destroyed = true + this.abort?.(err ?? new DOMException('The operation was aborted.', 'AbortError')) + } + } + } + + // 1. Let request be fetchParams’s request. + const request = fetchParams.request + + // 2. Let response be null. + let response = null + + // 3. Let timingInfo be fetchParams’s timing info. + const timingInfo = fetchParams.timingInfo + + // 4. Let httpCache be the result of determining the HTTP cache partition, + // given request. + // TODO: cache + const httpCache = null + + // 5. If httpCache is null, then set request’s cache mode to "no-store". + if (httpCache == null) { + request.cache = 'no-store' + } + + // 6. Let networkPartitionKey be the result of determining the network + // partition key given request. + // TODO + + // 7. Let newConnection be "yes" if forceNewConnection is true; otherwise + // "no". + const newConnection = forceNewConnection ? 'yes' : 'no' // eslint-disable-line no-unused-vars + + // 8. Switch on request’s mode: + if (request.mode === 'websocket') { + // Let connection be the result of obtaining a WebSocket connection, + // given request’s current URL. + // TODO + } else { + // Let connection be the result of obtaining a connection, given + // networkPartitionKey, request’s current URL’s origin, + // includeCredentials, and forceNewConnection. + // TODO + } + + // 9. Run these steps, but abort when the ongoing fetch is terminated: + + // 1. If connection is failure, then return a network error. + + // 2. Set timingInfo’s final connection timing info to the result of + // calling clamp and coarsen connection timing info with connection’s + // timing info, timingInfo’s post-redirect start time, and fetchParams’s + // cross-origin isolated capability. + + // 3. If connection is not an HTTP/2 connection, request’s body is non-null, + // and request’s body’s source is null, then append (`Transfer-Encoding`, + // `chunked`) to request’s header list. + + // 4. Set timingInfo’s final network-request start time to the coarsened + // shared current time given fetchParams’s cross-origin isolated + // capability. + + // 5. Set response to the result of making an HTTP request over connection + // using request with the following caveats: + + // - Follow the relevant requirements from HTTP. [HTTP] [HTTP-SEMANTICS] + // [HTTP-COND] [HTTP-CACHING] [HTTP-AUTH] + + // - If request’s body is non-null, and request’s body’s source is null, + // then the user agent may have a buffer of up to 64 kibibytes and store + // a part of request’s body in that buffer. If the user agent reads from + // request’s body beyond that buffer’s size and the user agent needs to + // resend request, then instead return a network error. + + // - Set timingInfo’s final network-response start time to the coarsened + // shared current time given fetchParams’s cross-origin isolated capability, + // immediately after the user agent’s HTTP parser receives the first byte + // of the response (e.g., frame header bytes for HTTP/2 or response status + // line for HTTP/1.x). + + // - Wait until all the headers are transmitted. + + // - Any responses whose status is in the range 100 to 199, inclusive, + // and is not 101, are to be ignored, except for the purposes of setting + // timingInfo’s final network-response start time above. + + // - If request’s header list contains `Transfer-Encoding`/`chunked` and + // response is transferred via HTTP/1.0 or older, then return a network + // error. + + // - If the HTTP request results in a TLS client certificate dialog, then: + + // 1. If request’s window is an environment settings object, make the + // dialog available in request’s window. + + // 2. Otherwise, return a network error. + + // To transmit request’s body body, run these steps: + let requestBody = null + // 1. If body is null and fetchParams’s process request end-of-body is + // non-null, then queue a fetch task given fetchParams’s process request + // end-of-body and fetchParams’s task destination. + if (request.body == null && fetchParams.processRequestEndOfBody) { + queueMicrotask(() => fetchParams.processRequestEndOfBody()) + } else if (request.body != null) { + // 2. Otherwise, if body is non-null: + + // 1. Let processBodyChunk given bytes be these steps: + const processBodyChunk = async function * (bytes) { + // 1. If the ongoing fetch is terminated, then abort these steps. + if (isCancelled(fetchParams)) { + return + } + + // 2. Run this step in parallel: transmit bytes. + yield bytes + + // 3. If fetchParams’s process request body is non-null, then run + // fetchParams’s process request body given bytes’s length. + fetchParams.processRequestBodyChunkLength?.(bytes.byteLength) + } + + // 2. Let processEndOfBody be these steps: + const processEndOfBody = () => { + // 1. If fetchParams is canceled, then abort these steps. + if (isCancelled(fetchParams)) { + return + } + + // 2. If fetchParams’s process request end-of-body is non-null, + // then run fetchParams’s process request end-of-body. + if (fetchParams.processRequestEndOfBody) { + fetchParams.processRequestEndOfBody() + } + } + + // 3. Let processBodyError given e be these steps: + const processBodyError = (e) => { + // 1. If fetchParams is canceled, then abort these steps. + if (isCancelled(fetchParams)) { + return + } + + // 2. If e is an "AbortError" DOMException, then abort fetchParams’s controller. + if (e.name === 'AbortError') { + fetchParams.controller.abort() + } else { + fetchParams.controller.terminate(e) + } + } + + // 4. Incrementally read request’s body given processBodyChunk, processEndOfBody, + // processBodyError, and fetchParams’s task destination. + requestBody = (async function * () { + try { + for await (const bytes of request.body.stream) { + yield * processBodyChunk(bytes) + } + processEndOfBody() + } catch (err) { + processBodyError(err) + } + })() + } + + try { + // socket is only provided for websockets + const { body, status, statusText, headersList, socket } = await dispatch({ body: requestBody }) + + if (socket) { + response = makeResponse({ status, statusText, headersList, socket }) + } else { + const iterator = body[Symbol.asyncIterator]() + fetchParams.controller.next = () => iterator.next() + + response = makeResponse({ status, statusText, headersList }) + } + } catch (err) { + // 10. If aborted, then: + if (err.name === 'AbortError') { + // 1. If connection uses HTTP/2, then transmit an RST_STREAM frame. + fetchParams.controller.connection.destroy() + + // 2. Return the appropriate network error for fetchParams. + return makeAppropriateNetworkError(fetchParams, err) + } + + return makeNetworkError(err) + } + + // 11. Let pullAlgorithm be an action that resumes the ongoing fetch + // if it is suspended. + const pullAlgorithm = () => { + fetchParams.controller.resume() + } + + // 12. Let cancelAlgorithm be an algorithm that aborts fetchParams’s + // controller with reason, given reason. + const cancelAlgorithm = (reason) => { + fetchParams.controller.abort(reason) + } + + // 13. Let highWaterMark be a non-negative, non-NaN number, chosen by + // the user agent. + // TODO + + // 14. Let sizeAlgorithm be an algorithm that accepts a chunk object + // and returns a non-negative, non-NaN, non-infinite number, chosen by the user agent. + // TODO + + // 15. Let stream be a new ReadableStream. + // 16. Set up stream with pullAlgorithm set to pullAlgorithm, + // cancelAlgorithm set to cancelAlgorithm, highWaterMark set to + // highWaterMark, and sizeAlgorithm set to sizeAlgorithm. + if (!ReadableStream) { + ReadableStream = require('stream/web').ReadableStream + } + + const stream = new ReadableStream( + { + async start (controller) { + fetchParams.controller.controller = controller + }, + async pull (controller) { + await pullAlgorithm(controller) + }, + async cancel (reason) { + await cancelAlgorithm(reason) + } + }, + { + highWaterMark: 0, + size () { + return 1 + } + } + ) + + // 17. Run these steps, but abort when the ongoing fetch is terminated: + + // 1. Set response’s body to a new body whose stream is stream. + response.body = { stream } + + // 2. If response is not a network error and request’s cache mode is + // not "no-store", then update response in httpCache for request. + // TODO + + // 3. If includeCredentials is true and the user agent is not configured + // to block cookies for request (see section 7 of [COOKIES]), then run the + // "set-cookie-string" parsing algorithm (see section 5.2 of [COOKIES]) on + // the value of each header whose name is a byte-case-insensitive match for + // `Set-Cookie` in response’s header list, if any, and request’s current URL. + // TODO + + // 18. If aborted, then: + // TODO + + // 19. Run these steps in parallel: + + // 1. Run these steps, but abort when fetchParams is canceled: + fetchParams.controller.on('terminated', onAborted) + fetchParams.controller.resume = async () => { + // 1. While true + while (true) { + // 1-3. See onData... + + // 4. Set bytes to the result of handling content codings given + // codings and bytes. + let bytes + let isFailure + try { + const { done, value } = await fetchParams.controller.next() + + if (isAborted(fetchParams)) { + break + } + + bytes = done ? undefined : value + } catch (err) { + if (fetchParams.controller.ended && !timingInfo.encodedBodySize) { + // zlib doesn't like empty streams. + bytes = undefined + } else { + bytes = err + + // err may be propagated from the result of calling readablestream.cancel, + // which might not be an error. https://github.com/nodejs/undici/issues/2009 + isFailure = true + } + } + + if (bytes === undefined) { + // 2. Otherwise, if the bytes transmission for response’s message + // body is done normally and stream is readable, then close + // stream, finalize response for fetchParams and response, and + // abort these in-parallel steps. + readableStreamClose(fetchParams.controller.controller) + + finalizeResponse(fetchParams, response) + + return + } + + // 5. Increase timingInfo’s decoded body size by bytes’s length. + timingInfo.decodedBodySize += bytes?.byteLength ?? 0 + + // 6. If bytes is failure, then terminate fetchParams’s controller. + if (isFailure) { + fetchParams.controller.terminate(bytes) + return + } + + // 7. Enqueue a Uint8Array wrapping an ArrayBuffer containing bytes + // into stream. + fetchParams.controller.controller.enqueue(new Uint8Array(bytes)) + + // 8. If stream is errored, then terminate the ongoing fetch. + if (isErrored(stream)) { + fetchParams.controller.terminate() + return + } + + // 9. If stream doesn’t need more data ask the user agent to suspend + // the ongoing fetch. + if (!fetchParams.controller.controller.desiredSize) { + return + } + } + } + + // 2. If aborted, then: + function onAborted (reason) { + // 2. If fetchParams is aborted, then: + if (isAborted(fetchParams)) { + // 1. Set response’s aborted flag. + response.aborted = true + + // 2. If stream is readable, then error stream with the result of + // deserialize a serialized abort reason given fetchParams’s + // controller’s serialized abort reason and an + // implementation-defined realm. + if (isReadable(stream)) { + fetchParams.controller.controller.error( + fetchParams.controller.serializedAbortReason + ) + } + } else { + // 3. Otherwise, if stream is readable, error stream with a TypeError. + if (isReadable(stream)) { + fetchParams.controller.controller.error(new TypeError('terminated', { + cause: isErrorLike(reason) ? reason : undefined + })) + } + } + + // 4. If connection uses HTTP/2, then transmit an RST_STREAM frame. + // 5. Otherwise, the user agent should close connection unless it would be bad for performance to do so. + fetchParams.controller.connection.destroy() + } + + // 20. Return response. + return response + + async function dispatch ({ body }) { + const url = requestCurrentURL(request) + /** @type {import('../..').Agent} */ + const agent = fetchParams.controller.dispatcher + + return new Promise((resolve, reject) => agent.dispatch( + { + path: url.pathname + url.search, + origin: url.origin, + method: request.method, + body: fetchParams.controller.dispatcher.isMockActive ? request.body && request.body.source : body, + headers: request.headersList.entries, + maxRedirections: 0, + upgrade: request.mode === 'websocket' ? 'websocket' : undefined + }, + { + body: null, + abort: null, + + onConnect (abort) { + // TODO (fix): Do we need connection here? + const { connection } = fetchParams.controller + + if (connection.destroyed) { + abort(new DOMException('The operation was aborted.', 'AbortError')) + } else { + fetchParams.controller.on('terminated', abort) + this.abort = connection.abort = abort + } + }, + + onHeaders (status, headersList, resume, statusText) { + if (status < 200) { + return + } + + let codings = [] + let location = '' + + const headers = new Headers() + + // For H2, the headers are a plain JS object + // We distinguish between them and iterate accordingly + if (Array.isArray(headersList)) { + for (let n = 0; n < headersList.length; n += 2) { + const key = headersList[n + 0].toString('latin1') + const val = headersList[n + 1].toString('latin1') + if (key.toLowerCase() === 'content-encoding') { + // https://www.rfc-editor.org/rfc/rfc7231#section-3.1.2.1 + // "All content-coding values are case-insensitive..." + codings = val.toLowerCase().split(',').map((x) => x.trim()) + } else if (key.toLowerCase() === 'location') { + location = val + } + + headers.append(key, val) + } + } else { + const keys = Object.keys(headersList) + for (const key of keys) { + const val = headersList[key] + if (key.toLowerCase() === 'content-encoding') { + // https://www.rfc-editor.org/rfc/rfc7231#section-3.1.2.1 + // "All content-coding values are case-insensitive..." + codings = val.toLowerCase().split(',').map((x) => x.trim()).reverse() + } else if (key.toLowerCase() === 'location') { + location = val + } + + headers.append(key, val) + } + } + + this.body = new Readable({ read: resume }) + + const decoders = [] + + const willFollow = request.redirect === 'follow' && + location && + redirectStatusSet.has(status) + + // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Encoding + if (request.method !== 'HEAD' && request.method !== 'CONNECT' && !nullBodyStatus.includes(status) && !willFollow) { + for (const coding of codings) { + // https://www.rfc-editor.org/rfc/rfc9112.html#section-7.2 + if (coding === 'x-gzip' || coding === 'gzip') { + decoders.push(zlib.createGunzip({ + // Be less strict when decoding compressed responses, since sometimes + // servers send slightly invalid responses that are still accepted + // by common browsers. + // Always using Z_SYNC_FLUSH is what cURL does. + flush: zlib.constants.Z_SYNC_FLUSH, + finishFlush: zlib.constants.Z_SYNC_FLUSH + })) + } else if (coding === 'deflate') { + decoders.push(zlib.createInflate()) + } else if (coding === 'br') { + decoders.push(zlib.createBrotliDecompress()) + } else { + decoders.length = 0 + break + } + } + } + + resolve({ + status, + statusText, + headersList: headers[kHeadersList], + body: decoders.length + ? pipeline(this.body, ...decoders, () => { }) + : this.body.on('error', () => {}) + }) + + return true + }, + + onData (chunk) { + if (fetchParams.controller.dump) { + return + } + + // 1. If one or more bytes have been transmitted from response’s + // message body, then: + + // 1. Let bytes be the transmitted bytes. + const bytes = chunk + + // 2. Let codings be the result of extracting header list values + // given `Content-Encoding` and response’s header list. + // See pullAlgorithm. + + // 3. Increase timingInfo’s encoded body size by bytes’s length. + timingInfo.encodedBodySize += bytes.byteLength + + // 4. See pullAlgorithm... + + return this.body.push(bytes) + }, + + onComplete () { + if (this.abort) { + fetchParams.controller.off('terminated', this.abort) + } + + fetchParams.controller.ended = true + + this.body.push(null) + }, + + onError (error) { + if (this.abort) { + fetchParams.controller.off('terminated', this.abort) + } + + this.body?.destroy(error) + + fetchParams.controller.terminate(error) + + reject(error) + }, + + onUpgrade (status, headersList, socket) { + if (status !== 101) { + return + } + + const headers = new Headers() + + for (let n = 0; n < headersList.length; n += 2) { + const key = headersList[n + 0].toString('latin1') + const val = headersList[n + 1].toString('latin1') + + headers.append(key, val) + } + + resolve({ + status, + statusText: STATUS_CODES[status], + headersList: headers[kHeadersList], + socket + }) + + return true + } + } + )) + } +} + +module.exports = { + fetch, + Fetch, + fetching, + finalizeAndReportTiming +} |