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All rights reserved.\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\n\nimport * as Platform from '../../../core/platform/platform.js';\nimport * as Protocol from '../../../generated/protocol.js';\nimport * as Helpers from '../helpers/helpers.js';\nimport * as Types from '../types/types.js';\n\nimport * as HandlerHelpers from './helpers.js';\nimport {data as metaHandlerData} from './MetaHandler.js';\nimport type {HandlerName} from './types.js';\n\nconst MILLISECONDS_TO_MICROSECONDS = 1000;\nconst SECONDS_TO_MICROSECONDS = 1000000;\n\n// Network requests from traces are actually formed of 5 trace records.\n// This handler tracks all trace records based on the request ID, and\n// then creates a new synthetic trace event for those network requests.\n//\n// This interface, then, defines the shape of the object we intend to\n// keep for each request in the trace. In the finalize we will convert\n// these 5 types of trace records to a synthetic complete event that\n// represents a composite of these trace records.\nexport interface TraceEventsForNetworkRequest {\n changePriority?: Types.Events.ResourceChangePriority;\n willSendRequests?: Types.Events.ResourceWillSendRequest[];\n sendRequests?: Types.Events.ResourceSendRequest[];\n receiveResponse?: Types.Events.ResourceReceiveResponse;\n resourceFinish?: Types.Events.ResourceFinish;\n receivedData?: Types.Events.ResourceReceivedData[];\n resourceMarkAsCached?: Types.Events.ResourceMarkAsCached;\n}\n\nexport interface WebSocketTraceDataForFrame {\n frame: string;\n webSocketIdentifier: number;\n events: Types.Events.WebSocketEvent[];\n syntheticConnection: Types.Events.SyntheticWebSocketConnection|null;\n}\nexport interface WebSocketTraceDataForWorker {\n workerId: string;\n webSocketIdentifier: number;\n events: Types.Events.WebSocketEvent[];\n syntheticConnection: Types.Events.SyntheticWebSocketConnection|null;\n}\nexport type WebSocketTraceData = WebSocketTraceDataForFrame|WebSocketTraceDataForWorker;\n\nconst webSocketData = new Map();\nconst linkPreconnectEvents: Types.Events.LinkPreconnect[] = [];\n\ninterface NetworkRequestData {\n byId: Map;\n byOrigin: Map;\n byTime: Types.Events.SyntheticNetworkRequest[];\n eventToInitiator: Map;\n webSocket: WebSocketTraceData[];\n entityMappings: HandlerHelpers.EntityMappings;\n linkPreconnectEvents: Types.Events.LinkPreconnect[];\n}\n\nconst requestMap = new Map();\nconst requestsById = new Map();\nconst requestsByOrigin = new Map();\nconst requestsByTime: Types.Events.SyntheticNetworkRequest[] = [];\n\nconst networkRequestEventByInitiatorUrl = new Map();\nconst eventToInitiatorMap = new Map();\n\n/**\n * These are to store ThirdParty data relationships between entities and events. To reduce iterating through data\n * more than we have to, here we start building the caches. After this, the RendererHandler will update\n * the relationships. When handling ThirdParty references, use the one in the RendererHandler instead.\n */\nconst entityMappings: HandlerHelpers.EntityMappings = {\n eventsByEntity: new Map(),\n entityByEvent: new Map(),\n createdEntityCache: new Map(),\n};\n\nfunction storeTraceEventWithRequestId(\n requestId: string, key: K, value: TraceEventsForNetworkRequest[K]): void {\n if (!requestMap.has(requestId)) {\n requestMap.set(requestId, {});\n }\n\n const traceEvents = requestMap.get(requestId);\n if (!traceEvents) {\n throw new Error(`Unable to locate trace events for request ID ${requestId}`);\n }\n\n if (Array.isArray(traceEvents[key])) {\n const target = traceEvents[key] as Types.Events.Event[];\n const values = value as Types.Events.Event[];\n target.push(...values);\n } else {\n traceEvents[key] = value;\n }\n}\n\nfunction firstPositiveValueInList(entries: Array): number {\n for (const entry of entries) {\n if (entry && entry > 0) {\n return entry;\n }\n }\n\n // In the event we don't find a positive value, we return 0 so as to\n // be a mathematical noop. It's typically not correct to return – say –\n // a -1 here because it would affect the calculation of stats below.\n return 0;\n}\n\nexport function reset(): void {\n requestsById.clear();\n requestsByOrigin.clear();\n requestMap.clear();\n requestsByTime.length = 0;\n networkRequestEventByInitiatorUrl.clear();\n eventToInitiatorMap.clear();\n webSocketData.clear();\n entityMappings.eventsByEntity.clear();\n entityMappings.entityByEvent.clear();\n entityMappings.createdEntityCache.clear();\n linkPreconnectEvents.length = 0;\n}\n\nexport function handleEvent(event: Types.Events.Event): void {\n if (Types.Events.isResourceChangePriority(event)) {\n storeTraceEventWithRequestId(event.args.data.requestId, 'changePriority', event);\n return;\n }\n\n if (Types.Events.isResourceWillSendRequest(event)) {\n storeTraceEventWithRequestId(event.args.data.requestId, 'willSendRequests', [event]);\n return;\n }\n\n if (Types.Events.isResourceSendRequest(event)) {\n storeTraceEventWithRequestId(event.args.data.requestId, 'sendRequests', [event]);\n return;\n }\n\n if (Types.Events.isResourceReceiveResponse(event)) {\n storeTraceEventWithRequestId(event.args.data.requestId, 'receiveResponse', event);\n return;\n }\n\n if (Types.Events.isResourceReceivedData(event)) {\n storeTraceEventWithRequestId(event.args.data.requestId, 'receivedData', [event]);\n return;\n }\n\n if (Types.Events.isResourceFinish(event)) {\n storeTraceEventWithRequestId(event.args.data.requestId, 'resourceFinish', event);\n return;\n }\n\n if (Types.Events.isResourceMarkAsCached(event)) {\n storeTraceEventWithRequestId(event.args.data.requestId, 'resourceMarkAsCached', event);\n return;\n }\n\n if (Types.Events.isWebSocketCreate(event) || Types.Events.isWebSocketInfo(event) ||\n Types.Events.isWebSocketTransfer(event)) {\n const identifier = event.args.data.identifier;\n if (!webSocketData.has(identifier)) {\n if (event.args.data.frame) {\n webSocketData.set(identifier, {\n frame: event.args.data.frame,\n webSocketIdentifier: identifier,\n events: [],\n syntheticConnection: null,\n });\n } else if (event.args.data.workerId) {\n webSocketData.set(identifier, {\n workerId: event.args.data.workerId,\n webSocketIdentifier: identifier,\n events: [],\n syntheticConnection: null,\n });\n }\n }\n\n webSocketData.get(identifier)?.events.push(event);\n }\n\n if (Types.Events.isLinkPreconnect(event)) {\n linkPreconnectEvents.push(event);\n return;\n }\n}\n\nexport async function finalize(): Promise {\n const {rendererProcessesByFrame} = metaHandlerData();\n for (const [requestId, request] of requestMap.entries()) {\n // If we have an incomplete set of events here, we choose to drop the network\n // request rather than attempt to synthesize the missing data.\n if (!request.sendRequests) {\n continue;\n }\n\n // In the data we may get multiple willSendRequests and sendRequests, which\n // will indicate that there are redirects for a given (sub)resource. In the\n // case of a navigation, e.g., example.com/ we will get willSendRequests,\n // and we should use these to calculate time spent in redirects.\n // In the case of sub-resources, however, e.g., example.com/foo.js we will\n // *only* get sendRequests, and we use these instead of willSendRequests\n // to detect the time in redirects. We always use the sendRequest for the\n // url, priority etc since it contains those values, but we use the\n // willSendRequest (if it exists) to calculate the timestamp and durations\n // of redirects.\n const redirects: Types.Events.SyntheticNetworkRedirect[] = [];\n for (let i = 0; i < request.sendRequests.length - 1; i++) {\n const sendRequest = request.sendRequests[i];\n const nextSendRequest = request.sendRequests[i + 1];\n\n // Use the willSendRequests as the source for redirects if possible.\n // We default to those of the sendRequests, however, since willSendRequest\n // is not guaranteed to be present in the data for every request.\n let ts = sendRequest.ts;\n let dur = Types.Timing.Micro(nextSendRequest.ts - sendRequest.ts);\n if (request.willSendRequests?.[i] && request.willSendRequests[i + 1]) {\n const willSendRequest = request.willSendRequests[i];\n const nextWillSendRequest = request.willSendRequests[i + 1];\n ts = willSendRequest.ts;\n dur = Types.Timing.Micro(nextWillSendRequest.ts - willSendRequest.ts);\n }\n\n redirects.push({\n url: sendRequest.args.data.url,\n priority: sendRequest.args.data.priority,\n requestMethod: sendRequest.args.data.requestMethod,\n ts,\n dur,\n });\n }\n\n const firstSendRequest = request.sendRequests[0];\n const finalSendRequest = request.sendRequests[request.sendRequests.length - 1];\n\n // We currently do not want to include data URI requests. We may revisit this in the future.\n if (finalSendRequest.args.data.url.startsWith('data:')) {\n continue;\n }\n\n // If a ResourceFinish event with an encoded data length is received,\n // then the resource was not cached; it was fetched before it was\n // requested, e.g. because it was pushed in this navigation.\n const isPushedResource = request.resourceFinish?.args.data.encodedDataLength !== 0;\n // This works around crbug.com/998397, which reports pushed resources, and resources served by a service worker as disk cached.\n const isDiskCached = !!request.receiveResponse && request.receiveResponse.args.data.fromCache &&\n !request.receiveResponse.args.data.fromServiceWorker && !isPushedResource;\n // If the request contains a resourceMarkAsCached event, it was served from memory cache.\n // The timing data returned is from the original (uncached) request, which\n // means that if we leave the above network record data as-is when the\n // request came from either the disk cache or memory cache, our calculations\n // will be incorrect.\n //\n // So we use this flag so when we calculate the timestamps of the various\n // events, we can overwrite them.\n // These timestamps may not be perfect (indeed they don't always match\n // the Network CDP domain exactly, which is likely an artifact of the way\n // the data is routed on the backend), but they're the closest we have.\n const isMemoryCached = request.resourceMarkAsCached !== undefined;\n // If a request has `resourceMarkAsCached` field, the `timing` field is not correct.\n // So let's discard it and override to 0 (which will be handled in later logic if timing field is undefined).\n const timing = isMemoryCached ? undefined : request.receiveResponse?.args.data.timing;\n // If a non-cached response has no |timing|, we ignore it. An example of this is chrome://new-page / about:blank.\n if (request.receiveResponse && !timing && !isMemoryCached) {\n continue;\n }\n\n const initialPriority = finalSendRequest.args.data.priority;\n let finalPriority = initialPriority;\n if (request.changePriority) {\n finalPriority = request.changePriority.args.data.priority;\n }\n\n // Network timings are complicated.\n // https://raw.githubusercontent.com/GoogleChrome/lighthouse/main/docs/Network-Timings.svg is generally correct, but.. less so for navigations/redirects/etc.\n\n // Start time\n // =======================\n // The time where the request started, which is either the first willSendRequest\n // event if there is one, or, if there is not, the sendRequest.\n const startTime = (request.willSendRequests?.length) ? Types.Timing.Micro(request.willSendRequests[0].ts) :\n Types.Timing.Micro(firstSendRequest.ts);\n\n // End redirect time\n // =======================\n // It's possible that when we start requesting data we will receive redirections.\n // Here we note the time of the *last* willSendRequest / sendRequest event,\n // which is used later on in the calculations for time queueing etc.\n const endRedirectTime = (request.willSendRequests?.length) ?\n Types.Timing.Micro(request.willSendRequests[request.willSendRequests.length - 1].ts) :\n Types.Timing.Micro(finalSendRequest.ts);\n\n // Finish time and end time\n // =======================\n // The finish time and the end time are subtly different.\n // - Finish time: records the point at which the network stack stopped receiving the data\n // - End time: the timestamp of the finish event itself (if one exists)\n //\n // The end time, then, will be slightly after the finish time.\n const endTime = request.resourceFinish ? request.resourceFinish.ts : endRedirectTime;\n const finishTime = request.resourceFinish?.args.data.finishTime ?\n Types.Timing.Micro(request.resourceFinish.args.data.finishTime * SECONDS_TO_MICROSECONDS) :\n Types.Timing.Micro(endTime);\n\n // Network duration\n // =======================\n // Time spent on the network.\n const networkDuration = Types.Timing.Micro(timing ? (finishTime || endRedirectTime) - endRedirectTime : 0);\n\n // Processing duration\n // =======================\n // Time spent from start to end.\n const processingDuration = Types.Timing.Micro(endTime - (finishTime || endTime));\n\n // Redirection duration\n // =======================\n // Time between the first willSendRequest / sendRequest and last. This we place in *front* of the\n // queueing, since the queueing time that we know about from the trace data is only the last request,\n // i.e., the one that occurs after all the redirects.\n const redirectionDuration = Types.Timing.Micro(endRedirectTime - startTime);\n\n // Queueing\n // =======================\n // The amount of time queueing is the time between the request's start time to the requestTime\n // arg recorded in the receiveResponse event. In the cases where the recorded start time is larger\n // that the requestTime we set queueing time to zero.\n const queueingFromTraceData = timing ? timing.requestTime * SECONDS_TO_MICROSECONDS - endRedirectTime : 0;\n const queueing = Types.Timing.Micro(Platform.NumberUtilities.clamp(queueingFromTraceData, 0, Number.MAX_VALUE));\n\n // Stalled\n // =======================\n // If the request is cached, the amount of time stalled is the time between the start time and\n // receiving a response.\n // Otherwise it is whichever positive number comes first from the following timing info:\n // DNS start, Connection start, Send Start, or the time duration between our start time and\n // receiving a response.\n const stalled = timing ?\n Types.Timing.Micro(firstPositiveValueInList([\n timing.dnsStart * MILLISECONDS_TO_MICROSECONDS,\n timing.connectStart * MILLISECONDS_TO_MICROSECONDS,\n timing.sendStart * MILLISECONDS_TO_MICROSECONDS,\n request.receiveResponse ? (request.receiveResponse.ts - endRedirectTime) : null,\n ])) :\n (request.receiveResponse ? Types.Timing.Micro(request.receiveResponse.ts - startTime) : Types.Timing.Micro(0));\n\n // Sending HTTP request\n // =======================\n // Time when the HTTP request is sent.\n const sendStartTime = timing ?\n Types.Timing.Micro(\n timing.requestTime * SECONDS_TO_MICROSECONDS + timing.sendStart * MILLISECONDS_TO_MICROSECONDS) :\n startTime;\n\n // Waiting\n // =======================\n // Time from when the send finished going to when the headers were received.\n const waiting = timing ?\n Types.Timing.Micro((timing.receiveHeadersEnd - timing.sendEnd) * MILLISECONDS_TO_MICROSECONDS) :\n Types.Timing.Micro(0);\n\n // Download\n // =======================\n // Time from receipt of headers to the finish time.\n const downloadStart = timing ?\n Types.Timing.Micro(\n timing.requestTime * SECONDS_TO_MICROSECONDS + timing.receiveHeadersEnd * MILLISECONDS_TO_MICROSECONDS) :\n startTime;\n const download = timing ? Types.Timing.Micro(((finishTime || downloadStart) - downloadStart)) :\n request.receiveResponse ? Types.Timing.Micro(endTime - request.receiveResponse.ts) :\n Types.Timing.Micro(0);\n\n const totalTime = Types.Timing.Micro(networkDuration + processingDuration);\n\n // Collect a few values from the timing info.\n // If the Network request is cached, these fields will be zero, so the minus will zero out them.\n const dnsLookup = timing ? Types.Timing.Micro((timing.dnsEnd - timing.dnsStart) * MILLISECONDS_TO_MICROSECONDS) :\n Types.Timing.Micro(0);\n const ssl = timing ? Types.Timing.Micro((timing.sslEnd - timing.sslStart) * MILLISECONDS_TO_MICROSECONDS) :\n Types.Timing.Micro(0);\n const proxyNegotiation = timing ?\n Types.Timing.Micro((timing.proxyEnd - timing.proxyStart) * MILLISECONDS_TO_MICROSECONDS) :\n Types.Timing.Micro(0);\n const requestSent = timing ?\n Types.Timing.Micro((timing.sendEnd - timing.sendStart) * MILLISECONDS_TO_MICROSECONDS) :\n Types.Timing.Micro(0);\n const initialConnection = timing ?\n Types.Timing.Micro((timing.connectEnd - timing.connectStart) * MILLISECONDS_TO_MICROSECONDS) :\n Types.Timing.Micro(0);\n\n // Finally get some of the general data from the trace events.\n const {frame, url, renderBlocking} = finalSendRequest.args.data;\n const {encodedDataLength, decodedBodyLength} =\n request.resourceFinish ? request.resourceFinish.args.data : {encodedDataLength: 0, decodedBodyLength: 0};\n const parsedUrl = new URL(url);\n const isHttps = parsedUrl.protocol === 'https:';\n const requestingFrameUrl =\n Helpers.Trace.activeURLForFrameAtTime(frame, finalSendRequest.ts, rendererProcessesByFrame) || '';\n // Construct a synthetic trace event for this network request.\n const networkEvent =\n Helpers.SyntheticEvents.SyntheticEventsManager.registerSyntheticEvent({\n rawSourceEvent: finalSendRequest,\n args: {\n data: {\n // All data we create from trace events should be added to |syntheticData|.\n syntheticData: {\n dnsLookup,\n download,\n downloadStart,\n finishTime,\n initialConnection,\n isDiskCached,\n isHttps,\n isMemoryCached,\n isPushedResource,\n networkDuration,\n processingDuration,\n proxyNegotiation,\n queueing,\n redirectionDuration,\n requestSent,\n sendStartTime,\n ssl,\n stalled,\n totalTime,\n waiting,\n },\n // All fields below are from TraceEventsForNetworkRequest.\n decodedBodyLength,\n encodedDataLength,\n frame,\n fromServiceWorker: request.receiveResponse?.args.data.fromServiceWorker,\n isLinkPreload: finalSendRequest.args.data.isLinkPreload || false,\n mimeType: request.receiveResponse?.args.data.mimeType ?? '',\n priority: finalPriority,\n initialPriority,\n protocol: request.receiveResponse?.args.data.protocol ?? 'unknown',\n redirects,\n // In the event the property isn't set, assume non-blocking.\n renderBlocking: renderBlocking ?? 'non_blocking',\n requestId,\n requestingFrameUrl,\n requestMethod: finalSendRequest.args.data.requestMethod,\n resourceType: finalSendRequest.args.data.resourceType ?? Protocol.Network.ResourceType.Other,\n statusCode: request.receiveResponse?.args.data.statusCode ?? 0,\n responseHeaders: request.receiveResponse?.args.data.headers ?? null,\n fetchPriorityHint: finalSendRequest.args.data.fetchPriorityHint ?? 'auto',\n initiator: finalSendRequest.args.data.initiator,\n stackTrace: finalSendRequest.args.data.stackTrace,\n timing,\n url,\n failed: request.resourceFinish?.args.data.didFail ?? false,\n finished: Boolean(request.resourceFinish),\n hasResponse: Boolean(request.receiveResponse),\n connectionId: request.receiveResponse?.args.data.connectionId,\n connectionReused: request.receiveResponse?.args.data.connectionReused,\n },\n },\n cat: 'loading',\n name: Types.Events.Name.SYNTHETIC_NETWORK_REQUEST,\n ph: Types.Events.Phase.COMPLETE,\n dur: Types.Timing.Micro(endTime - startTime),\n tdur: Types.Timing.Micro(endTime - startTime),\n ts: Types.Timing.Micro(startTime),\n tts: Types.Timing.Micro(startTime),\n pid: finalSendRequest.pid,\n tid: finalSendRequest.tid,\n });\n\n const requests = Platform.MapUtilities.getWithDefault(requestsByOrigin, parsedUrl.host, () => {\n return {\n renderBlocking: [],\n nonRenderBlocking: [],\n all: [],\n };\n });\n\n // For ease of rendering we sometimes want to differentiate between\n // render-blocking and non-render-blocking, so we divide the data here.\n if (!Helpers.Network.isSyntheticNetworkRequestEventRenderBlocking(networkEvent)) {\n requests.nonRenderBlocking.push(networkEvent);\n } else {\n requests.renderBlocking.push(networkEvent);\n }\n\n // However, there are also times where we just want to loop through all\n // the captured requests, so here we store all of them together.\n requests.all.push(networkEvent);\n requestsByTime.push(networkEvent);\n requestsById.set(networkEvent.args.data.requestId, networkEvent);\n\n // Update entity relationships for network events\n HandlerHelpers.addNetworkRequestToEntityMapping(networkEvent, entityMappings, request);\n\n // Establish initiator relationships\n const initiatorUrl = networkEvent.args.data.initiator?.url ||\n Helpers.Trace.getZeroIndexedStackTraceInEventPayload(networkEvent)?.at(0)?.url;\n if (initiatorUrl) {\n const events = networkRequestEventByInitiatorUrl.get(initiatorUrl) ?? [];\n events.push(networkEvent);\n networkRequestEventByInitiatorUrl.set(initiatorUrl, events);\n }\n }\n\n for (const request of requestsByTime) {\n const initiatedEvents = networkRequestEventByInitiatorUrl.get(request.args.data.url);\n\n if (initiatedEvents) {\n for (const initiatedEvent of initiatedEvents) {\n eventToInitiatorMap.set(initiatedEvent, request);\n }\n }\n }\n finalizeWebSocketData();\n}\n\nexport function data(): NetworkRequestData {\n return {\n byId: requestsById,\n byOrigin: requestsByOrigin,\n byTime: requestsByTime,\n eventToInitiator: eventToInitiatorMap,\n webSocket: [...webSocketData.values()],\n entityMappings: {\n entityByEvent: new Map(entityMappings.entityByEvent),\n eventsByEntity: new Map(entityMappings.eventsByEntity),\n createdEntityCache: new Map(entityMappings.createdEntityCache),\n },\n linkPreconnectEvents,\n };\n}\n\nexport function deps(): HandlerName[] {\n return ['Meta'];\n}\n\nfunction finalizeWebSocketData(): void {\n // for each WebSocketTraceData in webSocketData map, we create a synthetic event\n // to represent the entire WebSocket connection. This is done by finding the start and end event\n // if they exist, and if they don't, we use the first event in the list for start, and the traceBounds.max\n // for the end. So each WebSocketTraceData will have\n // {\n // events: the list of WebSocket events\n // syntheticConnection: the synthetic event representing the entire WebSocket connection\n // }\n webSocketData.forEach(data => {\n let startEvent: Types.Events.WebSocketEvent|null = null;\n let endEvent: Types.Events.WebSocketDestroy|null = null;\n for (const event of data.events) {\n if (Types.Events.isWebSocketCreate(event)) {\n startEvent = event;\n }\n if (Types.Events.isWebSocketDestroy(event)) {\n endEvent = event;\n }\n }\n data.syntheticConnection = createSyntheticWebSocketConnection(startEvent, endEvent, data.events[0]);\n });\n}\n\nfunction createSyntheticWebSocketConnection(\n startEvent: Types.Events.WebSocketCreate|null, endEvent: Types.Events.WebSocketDestroy|null,\n firstRecordedEvent: Types.Events.WebSocketEvent): Types.Events.SyntheticWebSocketConnection {\n const {traceBounds} = metaHandlerData();\n const startTs = startEvent ? startEvent.ts : traceBounds.min;\n const endTs = endEvent ? endEvent.ts : traceBounds.max;\n const duration = endTs - startTs;\n const mainEvent = startEvent || endEvent || firstRecordedEvent;\n return {\n name: 'SyntheticWebSocketConnection',\n cat: mainEvent.cat,\n ph: Types.Events.Phase.COMPLETE,\n ts: startTs,\n dur: duration as Types.Timing.Micro,\n pid: mainEvent.pid,\n tid: mainEvent.tid,\n s: mainEvent.s,\n rawSourceEvent: mainEvent,\n _tag: 'SyntheticEntryTag',\n args: {\n data: {\n identifier: mainEvent.args.data.identifier,\n priority: Protocol.Network.ResourcePriority.Low,\n url: mainEvent.args.data.url || '',\n },\n },\n };\n}\n"]}