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http.ts
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http.ts
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import type { Hub } from '@sentry/core';
import { getCurrentHub, getDynamicSamplingContextFromClient } from '@sentry/core';
import type {
DynamicSamplingContext,
EventProcessor,
Integration,
SanitizedRequestData,
TracePropagationTargets,
} from '@sentry/types';
import {
dynamicSamplingContextToSentryBaggageHeader,
fill,
generateSentryTraceHeader,
logger,
stringMatchesSomePattern,
} from '@sentry/utils';
import type * as http from 'http';
import type * as https from 'https';
import { LRUMap } from 'lru_map';
import type { NodeClient } from '../client';
import { NODE_VERSION } from '../nodeVersion';
import type { RequestMethod, RequestMethodArgs, RequestOptions } from './utils/http';
import { cleanSpanDescription, extractRawUrl, extractUrl, isSentryRequest, normalizeRequestArgs } from './utils/http';
interface TracingOptions {
/**
* List of strings/regex controlling to which outgoing requests
* the SDK will attach tracing headers.
*
* By default the SDK will attach those headers to all outgoing
* requests. If this option is provided, the SDK will match the
* request URL of outgoing requests against the items in this
* array, and only attach tracing headers if a match was found.
*
* @deprecated Use top level `tracePropagationTargets` option instead.
* ```
* Sentry.init({
* tracePropagationTargets: ['api.site.com'],
* })
*/
tracePropagationTargets?: TracePropagationTargets;
/**
* Function determining whether or not to create spans to track outgoing requests to the given URL.
* By default, spans will be created for all outgoing requests.
*/
shouldCreateSpanForRequest?: (url: string) => boolean;
}
interface HttpOptions {
/**
* Whether breadcrumbs should be recorded for requests
* Defaults to true
*/
breadcrumbs?: boolean;
/**
* Whether tracing spans should be created for requests
* Defaults to false
*/
tracing?: TracingOptions | boolean;
}
/**
* The http module integration instruments Node's internal http module. It creates breadcrumbs, transactions for outgoing
* http requests and attaches trace data when tracing is enabled via its `tracing` option.
*/
export class Http implements Integration {
/**
* @inheritDoc
*/
public static id: string = 'Http';
/**
* @inheritDoc
*/
public name: string = Http.id;
private readonly _breadcrumbs: boolean;
private readonly _tracing: TracingOptions | undefined;
/**
* @inheritDoc
*/
public constructor(options: HttpOptions = {}) {
this._breadcrumbs = typeof options.breadcrumbs === 'undefined' ? true : options.breadcrumbs;
this._tracing = !options.tracing ? undefined : options.tracing === true ? {} : options.tracing;
}
/**
* @inheritDoc
*/
public setupOnce(
_addGlobalEventProcessor: (callback: EventProcessor) => void,
setupOnceGetCurrentHub: () => Hub,
): void {
// No need to instrument if we don't want to track anything
if (!this._breadcrumbs && !this._tracing) {
return;
}
const clientOptions = setupOnceGetCurrentHub().getClient<NodeClient>()?.getOptions();
// Do not auto-instrument for other instrumenter
if (clientOptions && clientOptions.instrumenter !== 'sentry') {
__DEBUG_BUILD__ && logger.log('HTTP Integration is skipped because of instrumenter configuration.');
return;
}
const shouldCreateSpanForRequest =
// eslint-disable-next-line deprecation/deprecation
this._tracing?.shouldCreateSpanForRequest || clientOptions?.shouldCreateSpanForRequest;
// eslint-disable-next-line deprecation/deprecation
const tracePropagationTargets = clientOptions?.tracePropagationTargets || this._tracing?.tracePropagationTargets;
// eslint-disable-next-line @typescript-eslint/no-var-requires
const httpModule = require('http');
const wrappedHttpHandlerMaker = _createWrappedRequestMethodFactory(
httpModule,
this._breadcrumbs,
shouldCreateSpanForRequest,
tracePropagationTargets,
);
fill(httpModule, 'get', wrappedHttpHandlerMaker);
fill(httpModule, 'request', wrappedHttpHandlerMaker);
// NOTE: Prior to Node 9, `https` used internals of `http` module, thus we don't patch it.
// If we do, we'd get double breadcrumbs and double spans for `https` calls.
// It has been changed in Node 9, so for all versions equal and above, we patch `https` separately.
if (NODE_VERSION.major && NODE_VERSION.major > 8) {
// eslint-disable-next-line @typescript-eslint/no-var-requires
const httpsModule = require('https');
const wrappedHttpsHandlerMaker = _createWrappedRequestMethodFactory(
httpsModule,
this._breadcrumbs,
shouldCreateSpanForRequest,
tracePropagationTargets,
);
fill(httpsModule, 'get', wrappedHttpsHandlerMaker);
fill(httpsModule, 'request', wrappedHttpsHandlerMaker);
}
}
}
// for ease of reading below
type OriginalRequestMethod = RequestMethod;
type WrappedRequestMethod = RequestMethod;
type WrappedRequestMethodFactory = (original: OriginalRequestMethod) => WrappedRequestMethod;
/**
* Function which creates a function which creates wrapped versions of internal `request` and `get` calls within `http`
* and `https` modules. (NB: Not a typo - this is a creator^2!)
*
* @param breadcrumbsEnabled Whether or not to record outgoing requests as breadcrumbs
* @param tracingEnabled Whether or not to record outgoing requests as tracing spans
*
* @returns A function which accepts the exiting handler and returns a wrapped handler
*/
function _createWrappedRequestMethodFactory(
httpModule: typeof http | typeof https,
breadcrumbsEnabled: boolean,
shouldCreateSpanForRequest: ((url: string) => boolean) | undefined,
tracePropagationTargets: TracePropagationTargets | undefined,
): WrappedRequestMethodFactory {
// We're caching results so we don't have to recompute regexp every time we create a request.
const createSpanUrlMap = new LRUMap<string, boolean>(100);
const headersUrlMap = new LRUMap<string, boolean>(100);
const shouldCreateSpan = (url: string): boolean => {
if (shouldCreateSpanForRequest === undefined) {
return true;
}
const cachedDecision = createSpanUrlMap.get(url);
if (cachedDecision !== undefined) {
return cachedDecision;
}
const decision = shouldCreateSpanForRequest(url);
createSpanUrlMap.set(url, decision);
return decision;
};
const shouldAttachTraceData = (url: string): boolean => {
if (tracePropagationTargets === undefined) {
return true;
}
const cachedDecision = headersUrlMap.get(url);
if (cachedDecision !== undefined) {
return cachedDecision;
}
const decision = stringMatchesSomePattern(url, tracePropagationTargets);
headersUrlMap.set(url, decision);
return decision;
};
/**
* Captures Breadcrumb based on provided request/response pair
*/
function addRequestBreadcrumb(
event: string,
requestSpanData: SanitizedRequestData,
req: http.ClientRequest,
res?: http.IncomingMessage,
): void {
if (!getCurrentHub().getIntegration(Http)) {
return;
}
getCurrentHub().addBreadcrumb(
{
category: 'http',
data: {
status_code: res && res.statusCode,
...requestSpanData,
},
type: 'http',
},
{
event,
request: req,
response: res,
},
);
}
return function wrappedRequestMethodFactory(originalRequestMethod: OriginalRequestMethod): WrappedRequestMethod {
return function wrappedMethod(this: unknown, ...args: RequestMethodArgs): http.ClientRequest {
const requestArgs = normalizeRequestArgs(httpModule, args);
const requestOptions = requestArgs[0];
// eslint-disable-next-line deprecation/deprecation
const rawRequestUrl = extractRawUrl(requestOptions);
const requestUrl = extractUrl(requestOptions);
// we don't want to record requests to Sentry as either breadcrumbs or spans, so just use the original method
if (isSentryRequest(requestUrl)) {
return originalRequestMethod.apply(httpModule, requestArgs);
}
const hub = getCurrentHub();
const scope = hub.getScope();
const parentSpan = scope.getSpan();
const data = getRequestSpanData(requestUrl, requestOptions);
const requestSpan = shouldCreateSpan(rawRequestUrl)
? parentSpan?.startChild({
op: 'http.client',
description: `${data['http.method']} ${data.url}`,
data,
})
: undefined;
if (shouldAttachTraceData(rawRequestUrl)) {
if (requestSpan) {
const sentryTraceHeader = requestSpan.toTraceparent();
const dynamicSamplingContext = requestSpan?.transaction?.getDynamicSamplingContext();
addHeadersToRequestOptions(requestOptions, requestUrl, sentryTraceHeader, dynamicSamplingContext);
} else {
const client = hub.getClient();
const { traceId, sampled, dsc } = scope.getPropagationContext();
const sentryTraceHeader = generateSentryTraceHeader(traceId, undefined, sampled);
const dynamicSamplingContext =
dsc || (client ? getDynamicSamplingContextFromClient(traceId, client, scope) : undefined);
addHeadersToRequestOptions(requestOptions, requestUrl, sentryTraceHeader, dynamicSamplingContext);
}
} else {
__DEBUG_BUILD__ &&
logger.log(
`[Tracing] Not adding sentry-trace header to outgoing request (${requestUrl}) due to mismatching tracePropagationTargets option.`,
);
}
// eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
return originalRequestMethod
.apply(httpModule, requestArgs)
.once('response', function (this: http.ClientRequest, res: http.IncomingMessage): void {
// eslint-disable-next-line @typescript-eslint/no-this-alias
const req = this;
if (breadcrumbsEnabled) {
addRequestBreadcrumb('response', data, req, res);
}
if (requestSpan) {
if (res.statusCode) {
requestSpan.setHttpStatus(res.statusCode);
}
requestSpan.description = cleanSpanDescription(requestSpan.description, requestOptions, req);
requestSpan.finish();
}
})
.once('error', function (this: http.ClientRequest): void {
// eslint-disable-next-line @typescript-eslint/no-this-alias
const req = this;
if (breadcrumbsEnabled) {
addRequestBreadcrumb('error', data, req);
}
if (requestSpan) {
requestSpan.setHttpStatus(500);
requestSpan.description = cleanSpanDescription(requestSpan.description, requestOptions, req);
requestSpan.finish();
}
});
};
};
}
function addHeadersToRequestOptions(
requestOptions: RequestOptions,
requestUrl: string,
sentryTraceHeader: string,
dynamicSamplingContext: Partial<DynamicSamplingContext> | undefined,
): void {
__DEBUG_BUILD__ &&
logger.log(`[Tracing] Adding sentry-trace header ${sentryTraceHeader} to outgoing request to "${requestUrl}": `);
const sentryBaggage = dynamicSamplingContextToSentryBaggageHeader(dynamicSamplingContext);
const sentryBaggageHeader = normalizeBaggageHeader(requestOptions, sentryBaggage);
requestOptions.headers = {
...requestOptions.headers,
'sentry-trace': sentryTraceHeader,
// Setting a header to `undefined` will crash in node so we only set the baggage header when it's defined
...(sentryBaggageHeader && { baggage: sentryBaggageHeader }),
};
}
function getRequestSpanData(requestUrl: string, requestOptions: RequestOptions): SanitizedRequestData {
const method = requestOptions.method || 'GET';
const data: SanitizedRequestData = {
url: requestUrl,
'http.method': method,
};
if (requestOptions.hash) {
// strip leading "#"
data['http.fragment'] = requestOptions.hash.substring(1);
}
if (requestOptions.search) {
// strip leading "?"
data['http.query'] = requestOptions.search.substring(1);
}
return data;
}
function normalizeBaggageHeader(
requestOptions: RequestOptions,
sentryBaggageHeader: string | undefined,
): string | string[] | undefined {
if (!requestOptions.headers || !requestOptions.headers.baggage) {
return sentryBaggageHeader;
} else if (!sentryBaggageHeader) {
return requestOptions.headers.baggage as string | string[];
} else if (Array.isArray(requestOptions.headers.baggage)) {
return [...requestOptions.headers.baggage, sentryBaggageHeader];
}
// Type-cast explanation:
// Technically this the following could be of type `(number | string)[]` but for the sake of simplicity
// we say this is undefined behaviour, since it would not be baggage spec conform if the user did this.
return [requestOptions.headers.baggage, sentryBaggageHeader] as string[];
}