@datadog/browser-logs - npm Package Compare versions

Comparing version 4.1.0 to 4.2.0

bundle/datadog-logs.js

@@ -1,1 +0,1 @@
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0:e.id},Tt(),{view:{name:null,url:null,referrer:null}})}));var o,s=function(e,t,n){var r,i=((r={})[Le.error]=Ke(Le.error,t.eventRateLimiterThreshold,n),r[Le.warn]=Ke(Le.warn,t.eventRateLimiterThreshold,n),r[Le.info]=Ke(Le.info,t.eventRateLimiterThreshold,n),r[Le.debug]=Ke(Le.debug,t.eventRateLimiterThreshold,n),r.custom=Ke("custom",t.eventRateLimiterThreshold,n),r);return function(n,r){var o,s,u=n.date?n.date-he():void 0,a=e.findTrackedSession(u);if(a){var c=k({service:t.service,session_id:a.id},r,Tt(u),n);if(!1!==(null===(o=t.beforeSend)||void 0===o?void 0:o.call(t,c))&&!(null!==(s=i[c.status])&&void 0!==s?s:i.custom).isLimitReached())return c}}}(r,e,c);if(j()){var u=_();o=function(e){return u.send("log",e)}}else{var a=function(e){var t,n=r(e.logsEndpointBuilder);function r(t){return new P(new F(t,e.batchBytesLimit),e.maxBatchSize,e.batchBytesLimit,e.maxMessageSize,e.flushTimeout)}return void 0!==e.replica&&(t=r(e.replica.logsEndpointBuilder)),{add:function(e){n.add(e),t&&t.add(e)}}}(e);o=function(e){return a.add(e)}}function c(e){i.error(e.message,k({date:e.startClocks.timeStamp,error:{kind:e.type,origin:e.source,stack:e.stack}},e.resource?{http:{method:e.resource.method,status_code:e.resource.statusCode,url:e.resource.url}}:void 0))}return t.subscribe(c),function(e,t){var n=s(e,t);n&&o(n)}}(e,i,r,function(e){if(void 0===document.cookie||null===document.cookie)return!1;try{var t="dd_cookie_test_"+h(),r="test";ae(t,r,d,e);var i=ce(t)===r;return fe(t,e),i}catch(e){return n.error(e),!1}}(e.cookieOptions)&&!j()?Et(e):function(e){var t=kt(e)===St.TRACKED?{}:void 0;return{findTrackedSession:function(){return t}}}(e),t)}));Ot=function(){if("object"==typeof globalThis)return globalThis;Object.defineProperty(Object.prototype,"_dd_temp_",{get:function(){return this},configurable:!0});var e=_dd_temp_;return delete Object.prototype._dd_temp_,"object"!=typeof e&&(e="object"==typeof self?self:"object"==typeof window?window:{}),e}(),Rt=Mt,Lt=Ot[Ct="DD_LOGS"],Ot[Ct]=Rt,Lt&&Lt.q&&Lt.q.forEach((function(e){return ne(e,"onReady callback threw an error:")()}))}();

cjs/boot/buildEnv.d.ts

@@ -1,2 +0,2 @@
-import { BuildEnv } from '@datadog/browser-core';
+import type { BuildEnv } from '@datadog/browser-core';
 export declare const buildEnv: BuildEnv;

cjs/boot/buildEnv.js

@@ -6,4 +6,4 @@ "use strict";
     buildMode: 'release',
-    sdkVersion: '4.1.0',
+    sdkVersion: '4.2.0',
 };
 //# sourceMappingURL=buildEnv.js.map

cjs/boot/logsPublicApi.d.ts

@@ -1,5 +0,6 @@
-import { Context, InitConfiguration } from '@datadog/browser-core';
-import { LogsInitConfiguration } from '../domain/configuration';
-import { HandlerType, Logger, StatusType } from '../domain/logger';
-import { startLogs } from './startLogs';
+import type { Context, InitConfiguration } from '@datadog/browser-core';
+import type { LogsInitConfiguration } from '../domain/configuration';
+import type { HandlerType, StatusType } from '../domain/logger';
+import { Logger } from '../domain/logger';
+import type { startLogs } from './startLogs';
 export interface LoggerConfiguration {
@@ -6,0 +7,0 @@ level?: StatusType;

cjs/boot/startLogs.d.ts

@@ -1,7 +0,8 @@
-import { Context, InternalMonitoring, Observable, RawError } from '@datadog/browser-core';
-import { Logger, LogsMessage } from '../domain/logger';
-import { LogsSessionManager } from '../domain/logsSessionManager';
-import { LogsConfiguration } from '../domain/configuration';
+import type { Context, InternalMonitoring, RawError } from '@datadog/browser-core';
+import { Observable } from '@datadog/browser-core';
+import type { Logger, LogsMessage } from '../domain/logger';
+import type { LogsSessionManager } from '../domain/logsSessionManager';
+import type { LogsConfiguration } from '../domain/configuration';
 export declare function startLogs(configuration: LogsConfiguration, errorLogger: Logger): (message: LogsMessage, currentContext: Context) => void;
 export declare function doStartLogs(configuration: LogsConfiguration, errorObservable: Observable<RawError>, internalMonitoring: InternalMonitoring, sessionManager: LogsSessionManager, errorLogger: Logger): (message: LogsMessage, currentContext: Context) => void;
 export declare function buildAssemble(sessionManager: LogsSessionManager, configuration: LogsConfiguration, reportError: (error: RawError) => void): (message: LogsMessage, currentContext: Context) => Context | undefined;

cjs/domain/configuration.d.ts

@@ -1,3 +0,3 @@
-import { Configuration, InitConfiguration } from '@datadog/browser-core';
-import { LogsEvent } from '../logsEvent.types';
+import type { Configuration, InitConfiguration } from '@datadog/browser-core';
+import type { LogsEvent } from '../logsEvent.types';
 export interface LogsInitConfiguration extends InitConfiguration {
@@ -10,3 +10,8 @@ beforeSend?: ((event: LogsEvent) => void | boolean) | undefined;
     forwardErrorsToLogs: boolean;
+    requestErrorResponseLengthLimit: number;
 }
+/**
+ * arbitrary value, byte precision not needed
+ */
+export declare const DEFAULT_REQUEST_ERROR_RESPONSE_LENGTH_LIMIT: number;
 export declare function validateAndBuildLogsConfiguration(initConfiguration: LogsInitConfiguration): LogsConfiguration | undefined;

cjs/domain/configuration.js

 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.validateAndBuildLogsConfiguration = void 0;
+exports.validateAndBuildLogsConfiguration = exports.DEFAULT_REQUEST_ERROR_RESPONSE_LENGTH_LIMIT = void 0;
 var tslib_1 = require("tslib");
 var browser_core_1 = require("@datadog/browser-core");
 var buildEnv_1 = require("../boot/buildEnv");
+/**
+ * arbitrary value, byte precision not needed
+ */
+exports.DEFAULT_REQUEST_ERROR_RESPONSE_LENGTH_LIMIT = 32 * browser_core_1.ONE_KILO_BYTE;
 function validateAndBuildLogsConfiguration(initConfiguration) {
@@ -12,5 +16,5 @@ var baseConfiguration = browser_core_1.validateAndBuildConfiguration(initConfiguration, buildEnv_1.buildEnv);
     }
-    return tslib_1.__assign(tslib_1.__assign({}, baseConfiguration), { forwardErrorsToLogs: !!initConfiguration.forwardErrorsToLogs });
+    return tslib_1.__assign(tslib_1.__assign({}, baseConfiguration), { forwardErrorsToLogs: !!initConfiguration.forwardErrorsToLogs, requestErrorResponseLengthLimit: exports.DEFAULT_REQUEST_ERROR_RESPONSE_LENGTH_LIMIT });
 }
 exports.validateAndBuildLogsConfiguration = validateAndBuildLogsConfiguration;
 //# sourceMappingURL=configuration.js.map

cjs/domain/logger.d.ts

@@ -1,2 +0,2 @@
-import { Context, ContextValue, TimeStamp } from '@datadog/browser-core';
+import type { Context, ContextValue, TimeStamp } from '@datadog/browser-core';
 export declare const StatusType: {
@@ -3,0 +3,0 @@ readonly debug: "debug";

cjs/domain/logsSessionManager.d.ts

@@ -1,3 +0,3 @@
-import { RelativeTime } from '@datadog/browser-core';
-import { LogsConfiguration } from './configuration';
+import type { RelativeTime } from '@datadog/browser-core';
+import type { LogsConfiguration } from './configuration';
 export declare const LOGS_SESSION_KEY = "logs";
@@ -4,0 +4,0 @@ export interface LogsSessionManager {

cjs/domain/trackNetworkError.d.ts

@@ -1,5 +0,8 @@
-import { Observable, RawError } from '@datadog/browser-core';
-import { LogsConfiguration } from './configuration';
+import type { Observable, RawError } from '@datadog/browser-core';
+import type { LogsConfiguration } from './configuration';
 export declare function trackNetworkError(configuration: LogsConfiguration, errorObservable: Observable<RawError>): {
     stop: () => void;
 };
+export declare function computeXhrResponseData(xhr: XMLHttpRequest, configuration: LogsConfiguration, callback: (responseData: unknown) => void): void;
+export declare function computeFetchErrorText(error: Error, configuration: LogsConfiguration, callback: (errorText: string) => void): void;
+export declare function computeFetchResponseText(response: Response, configuration: LogsConfiguration, callback: (responseText?: string) => void): void;

cjs/domain/trackNetworkError.js

 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.trackNetworkError = void 0;
+exports.computeFetchResponseText = exports.computeFetchErrorText = exports.computeXhrResponseData = exports.trackNetworkError = void 0;
 var browser_core_1 = require("@datadog/browser-core");
@@ -18,2 +18,13 @@ function trackNetworkError(configuration, errorObservable) {
         if (!configuration.isIntakeUrl(request.url) && (isRejected(request) || isServerError(request))) {
+            if ('xhr' in request) {
+                computeXhrResponseData(request.xhr, configuration, onResponseDataAvailable);
+            }
+            else if (request.response) {
+                computeFetchResponseText(request.response, configuration, onResponseDataAvailable);
+            }
+            else if (request.error) {
+                computeFetchErrorText(request.error, configuration, onResponseDataAvailable);
+            }
+        }
+        function onResponseDataAvailable(responseData) {
             errorObservable.notify({
@@ -27,3 +38,3 @@ message: format(type) + " error " + request.method + " " + request.url,
                 source: browser_core_1.ErrorSource.NETWORK,
-                stack: truncateResponseText(request.responseText, configuration) || 'Failed to load',
+                stack: responseData || 'Failed to load',
                 startClocks: request.startClocks,
@@ -41,2 +52,69 @@ });
 exports.trackNetworkError = trackNetworkError;
+// TODO: ideally, computeXhrResponseData should always call the callback with a string instead of
+// `unknown`. But to keep backward compatibility, in the case of XHR with a `responseType` different
+// than "text", the response data should be whatever `xhr.response` is. This is a bit confusing as
+// Logs event 'stack' is expected to be a string. This should be changed in a future major version
+// as it could be a breaking change.
+function computeXhrResponseData(xhr, configuration, callback) {
+    if (typeof xhr.response === 'string') {
+        callback(truncateResponseText(xhr.response, configuration));
+    }
+    else {
+        callback(xhr.response);
+    }
+}
+exports.computeXhrResponseData = computeXhrResponseData;
+function computeFetchErrorText(error, configuration, callback) {
+    callback(truncateResponseText(browser_core_1.toStackTraceString(browser_core_1.computeStackTrace(error)), configuration));
+}
+exports.computeFetchErrorText = computeFetchErrorText;
+function computeFetchResponseText(response, configuration, callback) {
+    if (!window.TextDecoder) {
+        // If the browser doesn't support TextDecoder, let's read the whole response then truncate it.
+        //
+        // This should only be the case on early versions of Edge (before they migrated to Chromium).
+        // Even if it could be possible to implement a workaround for the missing TextDecoder API (using
+        // a Blob and FileReader), we found another issue preventing us from reading only the first
+        // bytes from the response: contrary to other browsers, when reading from the cloned response,
+        // if the original response gets canceled, the cloned response is also canceled and we can't
+        // know about it.  In the following illustration, the promise returned by `reader.read()` may
+        // never be fulfilled:
+        //
+        // fetch('/').then((response) => {
+        //   const reader = response.clone().body.getReader()
+        //   readMore()
+        //   function readMore() {
+        //     reader.read().then(
+        //       (result) => {
+        //         if (result.done) {
+        //           console.log('done')
+        //         } else {
+        //           readMore()
+        //         }
+        //       },
+        //       () => console.log('error')
+        //     )
+        //   }
+        //   response.body.getReader().cancel()
+        // })
+        response
+            .clone()
+            .text()
+            .then(browser_core_1.monitor(function (text) { return callback(truncateResponseText(text, configuration)); }), browser_core_1.monitor(function (error) { return callback("Unable to retrieve response: " + error); }));
+    }
+    else if (!response.body) {
+        callback();
+    }
+    else {
+        truncateResponseStream(response.clone().body, configuration.requestErrorResponseLengthLimit, function (error, responseText) {
+            if (error) {
+                callback("Unable to retrieve response: " + error);
+            }
+            else {
+                callback(responseText);
+            }
+        });
+    }
+}
+exports.computeFetchResponseText = computeFetchResponseText;
 function isRejected(request) {
@@ -49,3 +127,3 @@ return request.status === 0 && request.responseType !== 'opaque';
 function truncateResponseText(responseText, configuration) {
-    if (responseText && responseText.length > configuration.requestErrorResponseLengthLimit) {
+    if (responseText.length > configuration.requestErrorResponseLengthLimit) {
         return responseText.substring(0, configuration.requestErrorResponseLengthLimit) + "...";
@@ -61,2 +139,65 @@ }
 }
+function truncateResponseStream(stream, limit, callback) {
+    readLimitedAmountOfBytes(stream, limit, function (error, bytes, limitExceeded) {
+        if (error) {
+            callback(error);
+        }
+        else {
+            var responseText = new TextDecoder().decode(bytes);
+            if (limitExceeded) {
+                responseText += '...';
+            }
+            callback(undefined, responseText);
+        }
+    });
+}
+/**
+ * Read bytes from a ReadableStream until at least `limit` bytes have been read (or until the end of
+ * the stream). The callback is invoked with the at most `limit` bytes, and indicates that the limit
+ * has been exceeded if more bytes were available.
+ */
+function readLimitedAmountOfBytes(stream, limit, callback) {
+    var reader = stream.getReader();
+    var chunks = [];
+    var readBytesCount = 0;
+    readMore();
+    function readMore() {
+        reader.read().then(browser_core_1.monitor(function (result) {
+            if (result.done) {
+                onDone();
+                return;
+            }
+            chunks.push(result.value);
+            readBytesCount += result.value.length;
+            if (readBytesCount > limit) {
+                onDone();
+            }
+            else {
+                readMore();
+            }
+        }), browser_core_1.monitor(function (error) { return callback(error); }));
+    }
+    function onDone() {
+        reader.cancel().catch(
+        // we don't care if cancel fails, but we still need to catch the error to avoid reporting it
+        // as an unhandled rejection
+        browser_core_1.noop);
+        var completeBuffer;
+        if (chunks.length === 1) {
+            // optim: if the response is small enough to fit in a single buffer (provided by the browser), just
+            // use it directly.
+            completeBuffer = chunks[0];
+        }
+        else {
+            // else, we need to copy buffers into a larger buffer to concatenate them.
+            completeBuffer = new Uint8Array(readBytesCount);
+            var offset_1 = 0;
+            chunks.forEach(function (chunk) {
+                completeBuffer.set(chunk, offset_1);
+                offset_1 += chunk.length;
+            });
+        }
+        callback(undefined, completeBuffer.slice(0, limit), completeBuffer.length > limit);
+    }
+}
 //# sourceMappingURL=trackNetworkError.js.map

cjs/transport/startLoggerBatch.d.ts

@@ -1,5 +0,5 @@
-import { Context } from '@datadog/browser-core';
-import { LogsConfiguration } from '../domain/configuration';
+import type { Context } from '@datadog/browser-core';
+import type { LogsConfiguration } from '../domain/configuration';
 export declare function startLoggerBatch(configuration: LogsConfiguration): {
     add(message: Context): void;
 };

esm/boot/buildEnv.d.ts

@@ -1,2 +0,2 @@
-import { BuildEnv } from '@datadog/browser-core';
+import type { BuildEnv } from '@datadog/browser-core';
 export declare const buildEnv: BuildEnv;

esm/boot/buildEnv.js

 export var buildEnv = {
     buildMode: 'release',
-    sdkVersion: '4.1.0',
+    sdkVersion: '4.2.0',
 };
 //# sourceMappingURL=buildEnv.js.map

esm/boot/logsPublicApi.d.ts

@@ -1,5 +0,6 @@
-import { Context, InitConfiguration } from '@datadog/browser-core';
-import { LogsInitConfiguration } from '../domain/configuration';
-import { HandlerType, Logger, StatusType } from '../domain/logger';
-import { startLogs } from './startLogs';
+import type { Context, InitConfiguration } from '@datadog/browser-core';
+import type { LogsInitConfiguration } from '../domain/configuration';
+import type { HandlerType, StatusType } from '../domain/logger';
+import { Logger } from '../domain/logger';
+import type { startLogs } from './startLogs';
 export interface LoggerConfiguration {
@@ -6,0 +7,0 @@ level?: StatusType;

esm/boot/startLogs.d.ts

@@ -1,7 +0,8 @@
-import { Context, InternalMonitoring, Observable, RawError } from '@datadog/browser-core';
-import { Logger, LogsMessage } from '../domain/logger';
-import { LogsSessionManager } from '../domain/logsSessionManager';
-import { LogsConfiguration } from '../domain/configuration';
+import type { Context, InternalMonitoring, RawError } from '@datadog/browser-core';
+import { Observable } from '@datadog/browser-core';
+import type { Logger, LogsMessage } from '../domain/logger';
+import type { LogsSessionManager } from '../domain/logsSessionManager';
+import type { LogsConfiguration } from '../domain/configuration';
 export declare function startLogs(configuration: LogsConfiguration, errorLogger: Logger): (message: LogsMessage, currentContext: Context) => void;
 export declare function doStartLogs(configuration: LogsConfiguration, errorObservable: Observable<RawError>, internalMonitoring: InternalMonitoring, sessionManager: LogsSessionManager, errorLogger: Logger): (message: LogsMessage, currentContext: Context) => void;
 export declare function buildAssemble(sessionManager: LogsSessionManager, configuration: LogsConfiguration, reportError: (error: RawError) => void): (message: LogsMessage, currentContext: Context) => Context | undefined;

esm/domain/configuration.d.ts

@@ -1,3 +0,3 @@
-import { Configuration, InitConfiguration } from '@datadog/browser-core';
-import { LogsEvent } from '../logsEvent.types';
+import type { Configuration, InitConfiguration } from '@datadog/browser-core';
+import type { LogsEvent } from '../logsEvent.types';
 export interface LogsInitConfiguration extends InitConfiguration {
@@ -10,3 +10,8 @@ beforeSend?: ((event: LogsEvent) => void | boolean) | undefined;
     forwardErrorsToLogs: boolean;
+    requestErrorResponseLengthLimit: number;
 }
+/**
+ * arbitrary value, byte precision not needed
+ */
+export declare const DEFAULT_REQUEST_ERROR_RESPONSE_LENGTH_LIMIT: number;
 export declare function validateAndBuildLogsConfiguration(initConfiguration: LogsInitConfiguration): LogsConfiguration | undefined;

esm/domain/configuration.js

 import { __assign } from "tslib";
-import { validateAndBuildConfiguration } from '@datadog/browser-core';
+import { ONE_KILO_BYTE, validateAndBuildConfiguration } from '@datadog/browser-core';
 import { buildEnv } from '../boot/buildEnv';
+/**
+ * arbitrary value, byte precision not needed
+ */
+export var DEFAULT_REQUEST_ERROR_RESPONSE_LENGTH_LIMIT = 32 * ONE_KILO_BYTE;
 export function validateAndBuildLogsConfiguration(initConfiguration) {
@@ -9,4 +13,4 @@ var baseConfiguration = validateAndBuildConfiguration(initConfiguration, buildEnv);
     }
-    return __assign(__assign({}, baseConfiguration), { forwardErrorsToLogs: !!initConfiguration.forwardErrorsToLogs });
+    return __assign(__assign({}, baseConfiguration), { forwardErrorsToLogs: !!initConfiguration.forwardErrorsToLogs, requestErrorResponseLengthLimit: DEFAULT_REQUEST_ERROR_RESPONSE_LENGTH_LIMIT });
 }
 //# sourceMappingURL=configuration.js.map

esm/domain/logger.d.ts

@@ -1,2 +0,2 @@
-import { Context, ContextValue, TimeStamp } from '@datadog/browser-core';
+import type { Context, ContextValue, TimeStamp } from '@datadog/browser-core';
 export declare const StatusType: {
@@ -3,0 +3,0 @@ readonly debug: "debug";

esm/domain/logger.js

 var _a;
 import { __assign, __decorate } from "tslib";
-import { combine, createContextManager, ErrorSource, includes, monitored, display, } from '@datadog/browser-core';
+import { combine, createContextManager, ErrorSource, includes, monitored, display } from '@datadog/browser-core';
 export var StatusType = {
@@ -5,0 +5,0 @@ debug: 'debug',

esm/domain/logsSessionManager.d.ts

@@ -1,3 +0,3 @@
-import { RelativeTime } from '@datadog/browser-core';
-import { LogsConfiguration } from './configuration';
+import type { RelativeTime } from '@datadog/browser-core';
+import type { LogsConfiguration } from './configuration';
 export declare const LOGS_SESSION_KEY = "logs";
@@ -4,0 +4,0 @@ export interface LogsSessionManager {

esm/domain/trackNetworkError.d.ts

@@ -1,5 +0,8 @@
-import { Observable, RawError } from '@datadog/browser-core';
-import { LogsConfiguration } from './configuration';
+import type { Observable, RawError } from '@datadog/browser-core';
+import type { LogsConfiguration } from './configuration';
 export declare function trackNetworkError(configuration: LogsConfiguration, errorObservable: Observable<RawError>): {
     stop: () => void;
 };
+export declare function computeXhrResponseData(xhr: XMLHttpRequest, configuration: LogsConfiguration, callback: (responseData: unknown) => void): void;
+export declare function computeFetchErrorText(error: Error, configuration: LogsConfiguration, callback: (errorText: string) => void): void;
+export declare function computeFetchResponseText(response: Response, configuration: LogsConfiguration, callback: (responseText?: string) => void): void;

esm/domain/trackNetworkError.js

@@ -1,2 +0,2 @@
-import { ErrorSource, initXhrObservable, RequestType, initFetchObservable, } from '@datadog/browser-core';
+import { ErrorSource, initXhrObservable, RequestType, initFetchObservable, computeStackTrace, toStackTraceString, monitor, noop, } from '@datadog/browser-core';
 export function trackNetworkError(configuration, errorObservable) {
@@ -15,2 +15,13 @@ var xhrSubscription = initXhrObservable().subscribe(function (context) {
         if (!configuration.isIntakeUrl(request.url) && (isRejected(request) || isServerError(request))) {
+            if ('xhr' in request) {
+                computeXhrResponseData(request.xhr, configuration, onResponseDataAvailable);
+            }
+            else if (request.response) {
+                computeFetchResponseText(request.response, configuration, onResponseDataAvailable);
+            }
+            else if (request.error) {
+                computeFetchErrorText(request.error, configuration, onResponseDataAvailable);
+            }
+        }
+        function onResponseDataAvailable(responseData) {
             errorObservable.notify({
@@ -24,3 +35,3 @@ message: format(type) + " error " + request.method + " " + request.url,
                 source: ErrorSource.NETWORK,
-                stack: truncateResponseText(request.responseText, configuration) || 'Failed to load',
+                stack: responseData || 'Failed to load',
                 startClocks: request.startClocks,
@@ -37,2 +48,66 @@ });
 }
+// TODO: ideally, computeXhrResponseData should always call the callback with a string instead of
+// `unknown`. But to keep backward compatibility, in the case of XHR with a `responseType` different
+// than "text", the response data should be whatever `xhr.response` is. This is a bit confusing as
+// Logs event 'stack' is expected to be a string. This should be changed in a future major version
+// as it could be a breaking change.
+export function computeXhrResponseData(xhr, configuration, callback) {
+    if (typeof xhr.response === 'string') {
+        callback(truncateResponseText(xhr.response, configuration));
+    }
+    else {
+        callback(xhr.response);
+    }
+}
+export function computeFetchErrorText(error, configuration, callback) {
+    callback(truncateResponseText(toStackTraceString(computeStackTrace(error)), configuration));
+}
+export function computeFetchResponseText(response, configuration, callback) {
+    if (!window.TextDecoder) {
+        // If the browser doesn't support TextDecoder, let's read the whole response then truncate it.
+        //
+        // This should only be the case on early versions of Edge (before they migrated to Chromium).
+        // Even if it could be possible to implement a workaround for the missing TextDecoder API (using
+        // a Blob and FileReader), we found another issue preventing us from reading only the first
+        // bytes from the response: contrary to other browsers, when reading from the cloned response,
+        // if the original response gets canceled, the cloned response is also canceled and we can't
+        // know about it.  In the following illustration, the promise returned by `reader.read()` may
+        // never be fulfilled:
+        //
+        // fetch('/').then((response) => {
+        //   const reader = response.clone().body.getReader()
+        //   readMore()
+        //   function readMore() {
+        //     reader.read().then(
+        //       (result) => {
+        //         if (result.done) {
+        //           console.log('done')
+        //         } else {
+        //           readMore()
+        //         }
+        //       },
+        //       () => console.log('error')
+        //     )
+        //   }
+        //   response.body.getReader().cancel()
+        // })
+        response
+            .clone()
+            .text()
+            .then(monitor(function (text) { return callback(truncateResponseText(text, configuration)); }), monitor(function (error) { return callback("Unable to retrieve response: " + error); }));
+    }
+    else if (!response.body) {
+        callback();
+    }
+    else {
+        truncateResponseStream(response.clone().body, configuration.requestErrorResponseLengthLimit, function (error, responseText) {
+            if (error) {
+                callback("Unable to retrieve response: " + error);
+            }
+            else {
+                callback(responseText);
+            }
+        });
+    }
+}
 function isRejected(request) {
@@ -45,3 +120,3 @@ return request.status === 0 && request.responseType !== 'opaque';
 function truncateResponseText(responseText, configuration) {
-    if (responseText && responseText.length > configuration.requestErrorResponseLengthLimit) {
+    if (responseText.length > configuration.requestErrorResponseLengthLimit) {
         return responseText.substring(0, configuration.requestErrorResponseLengthLimit) + "...";
@@ -57,2 +132,65 @@ }
 }
+function truncateResponseStream(stream, limit, callback) {
+    readLimitedAmountOfBytes(stream, limit, function (error, bytes, limitExceeded) {
+        if (error) {
+            callback(error);
+        }
+        else {
+            var responseText = new TextDecoder().decode(bytes);
+            if (limitExceeded) {
+                responseText += '...';
+            }
+            callback(undefined, responseText);
+        }
+    });
+}
+/**
+ * Read bytes from a ReadableStream until at least `limit` bytes have been read (or until the end of
+ * the stream). The callback is invoked with the at most `limit` bytes, and indicates that the limit
+ * has been exceeded if more bytes were available.
+ */
+function readLimitedAmountOfBytes(stream, limit, callback) {
+    var reader = stream.getReader();
+    var chunks = [];
+    var readBytesCount = 0;
+    readMore();
+    function readMore() {
+        reader.read().then(monitor(function (result) {
+            if (result.done) {
+                onDone();
+                return;
+            }
+            chunks.push(result.value);
+            readBytesCount += result.value.length;
+            if (readBytesCount > limit) {
+                onDone();
+            }
+            else {
+                readMore();
+            }
+        }), monitor(function (error) { return callback(error); }));
+    }
+    function onDone() {
+        reader.cancel().catch(
+        // we don't care if cancel fails, but we still need to catch the error to avoid reporting it
+        // as an unhandled rejection
+        noop);
+        var completeBuffer;
+        if (chunks.length === 1) {
+            // optim: if the response is small enough to fit in a single buffer (provided by the browser), just
+            // use it directly.
+            completeBuffer = chunks[0];
+        }
+        else {
+            // else, we need to copy buffers into a larger buffer to concatenate them.
+            completeBuffer = new Uint8Array(readBytesCount);
+            var offset_1 = 0;
+            chunks.forEach(function (chunk) {
+                completeBuffer.set(chunk, offset_1);
+                offset_1 += chunk.length;
+            });
+        }
+        callback(undefined, completeBuffer.slice(0, limit), completeBuffer.length > limit);
+    }
+}
 //# sourceMappingURL=trackNetworkError.js.map

esm/transport/startLoggerBatch.d.ts

@@ -1,5 +0,5 @@
-import { Context } from '@datadog/browser-core';
-import { LogsConfiguration } from '../domain/configuration';
+import type { Context } from '@datadog/browser-core';
+import type { LogsConfiguration } from '../domain/configuration';
 export declare function startLoggerBatch(configuration: LogsConfiguration): {
     add(message: Context): void;
 };

package.json

 {
   "name": "@datadog/browser-logs",
-  "version": "4.1.0",
+  "version": "4.2.0",
   "license": "Apache-2.0",
@@ -16,3 +16,3 @@ "main": "cjs/entries/main.js",
   "dependencies": {
-    "@datadog/browser-core": "4.1.0",
+    "@datadog/browser-core": "4.2.0",
     "tslib": "^1.10.0"
@@ -29,3 +29,3 @@ },
   },
-  "gitHead": "27c7b4c01354dd77116f5bfb6eef370d4e2585bd"
+  "gitHead": "caceec86d8039d63ae5c176ba82e35e466e6cec7"
 }

src/boot/buildEnv.ts

@@ -1,2 +0,2 @@
-import { BuildEnv, BuildMode } from '@datadog/browser-core'
+import type { BuildEnv, BuildMode } from '@datadog/browser-core'
 
@@ -3,0 +3,0 @@ export const buildEnv: BuildEnv = {

src/boot/logsPublicApi.spec.ts

@@ -0,3 +1,3 @@
+import type { Context } from '@datadog/browser-core'
 import {
-  Context,
   monitor,
@@ -9,7 +9,10 @@ ONE_SECOND,
 } from '@datadog/browser-core'
-import { Clock, deleteEventBridgeStub, initEventBridgeStub, mockClock } from '../../../core/test/specHelper'
-import { HybridInitConfiguration, LogsInitConfiguration } from '../domain/configuration'
+import type { Clock } from '../../../core/test/specHelper'
+import { deleteEventBridgeStub, initEventBridgeStub, mockClock } from '../../../core/test/specHelper'
+import type { HybridInitConfiguration, LogsInitConfiguration } from '../domain/configuration'
 
-import { HandlerType, LogsMessage, StatusType } from '../domain/logger'
-import { LogsPublicApi, makeLogsPublicApi, StartLogs } from './logsPublicApi'
+import type { LogsMessage } from '../domain/logger'
+import { HandlerType, StatusType } from '../domain/logger'
+import type { LogsPublicApi, StartLogs } from './logsPublicApi'
+import { makeLogsPublicApi } from './logsPublicApi'
 
@@ -16,0 +19,0 @@ const DEFAULT_INIT_CONFIGURATION = { clientToken: 'xxx' }

src/boot/logsPublicApi.ts

@@ -0,5 +1,5 @@
+import type { Context, InitConfiguration } from '@datadog/browser-core'
 import {
   BoundedBuffer,
   combine,
-  Context,
   createContextManager,
@@ -10,8 +10,9 @@ makePublicApi,
   deepClone,
-  InitConfiguration,
   canUseEventBridge,
 } from '@datadog/browser-core'
-import { LogsInitConfiguration, validateAndBuildLogsConfiguration } from '../domain/configuration'
-import { HandlerType, Logger, LogsMessage, StatusType } from '../domain/logger'
-import { startLogs } from './startLogs'
+import type { LogsInitConfiguration } from '../domain/configuration'
+import { validateAndBuildLogsConfiguration } from '../domain/configuration'
+import type { HandlerType, LogsMessage, StatusType } from '../domain/logger'
+import { Logger } from '../domain/logger'
+import type { startLogs } from './startLogs'
 
@@ -18,0 +19,0 @@ export interface LoggerConfiguration {

src/boot/startLogs.spec.ts

@@ -0,3 +1,3 @@
+import type { Context, RawError, RelativeTime, TimeStamp } from '@datadog/browser-core'
 import {
-  Context,
   ErrorSource,
@@ -7,6 +7,3 @@ noop,
   ONE_MINUTE,
-  RawError,
-  RelativeTime,
   resetExperimentalFeatures,
-  TimeStamp,
   updateExperimentalFeatures,
@@ -16,4 +13,4 @@ getTimeStamp,
 import sinon from 'sinon'
+import type { Clock } from '../../../core/test/specHelper'
 import {
-  Clock,
   deleteEventBridgeStub,
@@ -24,7 +21,9 @@ initEventBridgeStub,
 } from '../../../core/test/specHelper'
-import { LogsConfiguration, validateAndBuildLogsConfiguration } from '../domain/configuration'
+import type { LogsConfiguration } from '../domain/configuration'
+import { validateAndBuildLogsConfiguration } from '../domain/configuration'
 
-import { Logger, LogsMessage, StatusType } from '../domain/logger'
-import { LogsSessionManager } from '../domain/logsSessionManager'
-import { LogsEvent } from '../logsEvent.types'
+import type { LogsMessage } from '../domain/logger'
+import { Logger, StatusType } from '../domain/logger'
+import type { LogsSessionManager } from '../domain/logsSessionManager'
+import type { LogsEvent } from '../logsEvent.types'
 import { buildAssemble, doStartLogs, startLogs as originalStartLogs } from './startLogs'
@@ -31,0 +30,0 @@

src/boot/startLogs.ts

@@ -0,10 +1,7 @@
+import type { Context, InternalMonitoring, RawError, RelativeTime } from '@datadog/browser-core'
 import {
   areCookiesAuthorized,
   combine,
-  Context,
   createEventRateLimiter,
-  InternalMonitoring,
   Observable,
-  RawError,
-  RelativeTime,
   trackRuntimeError,
@@ -18,6 +15,8 @@ trackConsoleError,
 import { trackNetworkError } from '../domain/trackNetworkError'
-import { Logger, LogsMessage, StatusType } from '../domain/logger'
-import { LogsSessionManager, startLogsSessionManager, startLogsSessionManagerStub } from '../domain/logsSessionManager'
+import type { Logger, LogsMessage } from '../domain/logger'
+import { StatusType } from '../domain/logger'
+import type { LogsSessionManager } from '../domain/logsSessionManager'
+import { startLogsSessionManager, startLogsSessionManagerStub } from '../domain/logsSessionManager'
 import { startLoggerBatch } from '../transport/startLoggerBatch'
-import { LogsConfiguration } from '../domain/configuration'
+import type { LogsConfiguration } from '../domain/configuration'
 
@@ -24,0 +23,0 @@ export function startLogs(configuration: LogsConfiguration, errorLogger: Logger) {

src/domain/configuration.ts

@@ -1,4 +0,5 @@
-import { Configuration, InitConfiguration, validateAndBuildConfiguration } from '@datadog/browser-core'
+import type { Configuration, InitConfiguration } from '@datadog/browser-core'
+import { ONE_KILO_BYTE, validateAndBuildConfiguration } from '@datadog/browser-core'
 import { buildEnv } from '../boot/buildEnv'
-import { LogsEvent } from '../logsEvent.types'
+import type { LogsEvent } from '../logsEvent.types'
 
@@ -14,4 +15,10 @@ export interface LogsInitConfiguration extends InitConfiguration {
   forwardErrorsToLogs: boolean
+  requestErrorResponseLengthLimit: number
 }
 
+/**
+ * arbitrary value, byte precision not needed
+ */
+export const DEFAULT_REQUEST_ERROR_RESPONSE_LENGTH_LIMIT = 32 * ONE_KILO_BYTE
+
 export function validateAndBuildLogsConfiguration(
@@ -29,3 +36,5 @@ initConfiguration: LogsInitConfiguration
     forwardErrorsToLogs: !!initConfiguration.forwardErrorsToLogs,
+
+    requestErrorResponseLengthLimit: DEFAULT_REQUEST_ERROR_RESPONSE_LENGTH_LIMIT,
   }
 }

src/domain/logger.spec.ts

 import { display } from '@datadog/browser-core'
-import { HandlerType, Logger, LogsMessage, STATUSES, StatusType } from './logger'
+import type { LogsMessage } from './logger'
+import { HandlerType, Logger, STATUSES, StatusType } from './logger'
 
@@ -4,0 +5,0 @@ describe('Logger', () => {

src/domain/logger.ts

@@ -1,12 +0,3 @@
-import {
-  combine,
-  Context,
-  ContextValue,
-  createContextManager,
-  ErrorSource,
-  includes,
-  monitored,
-  display,
-  TimeStamp,
-} from '@datadog/browser-core'
+import type { Context, ContextValue, TimeStamp } from '@datadog/browser-core'
+import { combine, createContextManager, ErrorSource, includes, monitored, display } from '@datadog/browser-core'
 
@@ -13,0 +4,0 @@ export const StatusType = {

src/domain/logsSessionManager.spec.ts

@@ -0,1 +1,2 @@
+import type { RelativeTime } from '@datadog/browser-core'
 import {
@@ -8,7 +9,7 @@ COOKIE_ACCESS_DELAY,
   ONE_SECOND,
-  RelativeTime,
 } from '@datadog/browser-core'
-import { Clock, mockClock } from '../../../core/test/specHelper'
+import type { Clock } from '../../../core/test/specHelper'
+import { mockClock } from '../../../core/test/specHelper'
 
-import { LogsConfiguration } from './configuration'
+import type { LogsConfiguration } from './configuration'
 import {
@@ -15,0 +16,0 @@ LOGS_SESSION_KEY,

src/domain/logsSessionManager.ts

@@ -1,3 +0,4 @@
-import { performDraw, startSessionManager, RelativeTime } from '@datadog/browser-core'
-import { LogsConfiguration } from './configuration'
+import type { RelativeTime } from '@datadog/browser-core'
+import { performDraw, startSessionManager } from '@datadog/browser-core'
+import type { LogsConfiguration } from './configuration'
 
@@ -4,0 +5,0 @@ export const LOGS_SESSION_KEY = 'logs'

src/domain/trackNetworkError.spec.ts

@@ -1,7 +0,19 @@
-import { isIE, Observable, RawError } from '@datadog/browser-core'
-import { FetchStub, FetchStubManager, SPEC_ENDPOINTS, stubFetch } from '../../../core/test/specHelper'
-import { LogsConfiguration } from './configuration'
+import type { RawError } from '@datadog/browser-core'
+import { isIE, Observable } from '@datadog/browser-core'
+import type { FetchStub, FetchStubManager } from '../../../core/test/specHelper'
+import { SPEC_ENDPOINTS, ResponseStub, stubFetch } from '../../../core/test/specHelper'
+import type { LogsConfiguration } from './configuration'
 
-import { trackNetworkError } from './trackNetworkError'
+import {
+  computeFetchErrorText,
+  computeFetchResponseText,
+  computeXhrResponseData,
+  trackNetworkError,
+} from './trackNetworkError'
 
+const CONFIGURATION = {
+  requestErrorResponseLengthLimit: 64,
+  ...SPEC_ENDPOINTS,
+} as LogsConfiguration
+
 describe('network error tracker', () => {
@@ -12,3 +24,2 @@ let errorObservableSpy: jasmine.Spy
   let stopNetworkErrorTracking: () => void
-  let configuration: LogsConfiguration
   let errorObservable: Observable<RawError>
@@ -31,9 +42,5 @@ const FAKE_URL = 'http://fake.com/'
     errorObservableSpy = spyOn(errorObservable, 'notify')
-    configuration = {
-      requestErrorResponseLengthLimit: 32,
-      ...SPEC_ENDPOINTS,
-    } as LogsConfiguration
 
     fetchStubManager = stubFetch()
-    ;({ stop: stopNetworkErrorTracking } = trackNetworkError(configuration, errorObservable))
+    ;({ stop: stopNetworkErrorTracking } = trackNetworkError(CONFIGURATION, errorObservable))
     fetchStub = window.fetch as FetchStub
@@ -111,4 +118,4 @@ })
 
-  it('should add a default error response text', (done) => {
-    fetchStub(FAKE_URL).resolveWith({ ...DEFAULT_REQUEST, responseText: undefined })
+  it('uses a fallback when the response text is empty', (done) => {
+    fetchStub(FAKE_URL).resolveWith({ ...DEFAULT_REQUEST, responseText: '' })
 
@@ -122,15 +129,145 @@ fetchStubManager.whenAllComplete(() => {
   })
+})
 
-  it('should truncate error response text', (done) => {
-    fetchStub(FAKE_URL).resolveWith({
-      ...DEFAULT_REQUEST,
-      responseText: 'Lorem ipsum dolor sit amet orci aliquam.',
+describe('computeXhrResponseData', () => {
+  it('computes response text from XHR', (done) => {
+    const xhr = { response: 'foo' } as XMLHttpRequest
+    computeXhrResponseData(xhr, CONFIGURATION, (responseData) => {
+      expect(responseData).toBe('foo')
+      done()
     })
+  })
 
-    fetchStubManager.whenAllComplete(() => {
-      const stack = (errorObservableSpy.calls.mostRecent().args[0] as RawError).stack
-      expect(stack).toEqual('Lorem ipsum dolor sit amet orci ...')
+  it('return the response value directly if it is not a string', (done) => {
+    const xhr = { response: { foo: 'bar' } } as XMLHttpRequest
+    computeXhrResponseData(xhr, CONFIGURATION, (responseData) => {
+      expect(responseData).toEqual({ foo: 'bar' })
       done()
     })
   })
+
+  it('truncates xhr response text', (done) => {
+    const xhr = { response: 'Lorem ipsum dolor sit amet orci aliquam.' } as XMLHttpRequest
+    computeXhrResponseData(xhr, { ...CONFIGURATION, requestErrorResponseLengthLimit: 32 }, (responseData) => {
+      expect(responseData).toBe('Lorem ipsum dolor sit amet orci ...')
+      done()
+    })
+  })
 })
+
+describe('computeFetchResponseText', () => {
+  let onunhandledrejectionSpy: jasmine.Spy
+
+  beforeEach(() => {
+    if (isIE()) {
+      pending('IE does not support the fetch API')
+    }
+
+    onunhandledrejectionSpy = jasmine.createSpy()
+    window.onunhandledrejection = onunhandledrejectionSpy
+  })
+
+  afterEach(() => {
+    window.onunhandledrejection = null
+  })
+
+  it('computes response text from Response objects', (done) => {
+    computeFetchResponseText(new ResponseStub({ responseText: 'foo' }), CONFIGURATION, (responseText) => {
+      expect(responseText).toBe('foo')
+      done()
+    })
+  })
+
+  // https://fetch.spec.whatwg.org/#concept-body-consume-body
+  it('computes response text from Response objects failing to retrieve text', (done) => {
+    computeFetchResponseText(
+      new ResponseStub({ responseTextError: new Error('locked') }),
+      CONFIGURATION,
+      (responseText) => {
+        expect(responseText).toBe('Unable to retrieve response: Error: locked')
+        done()
+      }
+    )
+  })
+
+  it('does not consume the response body', (done) => {
+    const response = new ResponseStub({ responseText: 'foo' })
+    computeFetchResponseText(response, CONFIGURATION, () => {
+      expect(response.bodyUsed).toBe(false)
+      done()
+    })
+  })
+
+  it('reads a limited amount of bytes from the response', (done) => {
+    // Creates a response that stream "f" indefinitely, one byte at a time
+    const cancelSpy = jasmine.createSpy()
+    const pullSpy = jasmine.createSpy().and.callFake((controller: ReadableStreamDefaultController<Uint8Array>) => {
+      controller.enqueue(new TextEncoder().encode('f'))
+    })
+    const response = new ResponseStub({
+      body: new ReadableStream({
+        pull: pullSpy,
+        cancel: cancelSpy,
+      }),
+    })
+
+    computeFetchResponseText(response, CONFIGURATION, () => {
+      expect(pullSpy).toHaveBeenCalledTimes(
+        // readLimitedAmountOfBytes may read one more byte than necessary to make sure it exceeds the limit
+        CONFIGURATION.requestErrorResponseLengthLimit + 1
+      )
+      expect(cancelSpy).toHaveBeenCalledTimes(1)
+      done()
+    })
+  })
+
+  it('truncates the response if its size is greater than the limit', (done) => {
+    const text = 'foobar'
+    computeFetchResponseText(
+      new ResponseStub({ responseText: text }),
+      { ...CONFIGURATION, requestErrorResponseLengthLimit: text.length - 1 },
+      (responseData) => {
+        expect(responseData).toBe('fooba...')
+        done()
+      }
+    )
+  })
+
+  it('does not truncate the response if its size is equal to the limit', (done) => {
+    const text = 'foo'
+    computeFetchResponseText(
+      new ResponseStub({ responseText: text }),
+      { ...CONFIGURATION, requestErrorResponseLengthLimit: text.length },
+      (responseData) => {
+        expect(responseData).toBe(text)
+        done()
+      }
+    )
+  })
+
+  it('does not yield an unhandled rejection error if the cancel promise is rejected', (done) => {
+    // Creates a response that stream "f" indefinitely and fails to be canceled
+    const response = new ResponseStub({
+      body: new ReadableStream({
+        pull: (controller) => controller.enqueue(new TextEncoder().encode('f')),
+        cancel: () => Promise.reject(new Error('foo')),
+      }),
+    })
+
+    computeFetchResponseText(response, CONFIGURATION, () => {
+      setTimeout(() => {
+        expect(onunhandledrejectionSpy).not.toHaveBeenCalled()
+        done()
+      })
+    })
+  })
+})
+
+describe('computeFetchErrorText', () => {
+  it('computes response text from requests ending as an error', (done) => {
+    computeFetchErrorText(new Error('fetch error'), CONFIGURATION, (errorText) => {
+      expect(errorText).toContain('Error: fetch error')
+      done()
+    })
+  })
+})

src/domain/trackNetworkError.ts

@@ -0,12 +1,13 @@
+import type { FetchCompleteContext, Observable, RawError, XhrCompleteContext } from '@datadog/browser-core'
 import {
   ErrorSource,
-  FetchCompleteContext,
   initXhrObservable,
-  Observable,
-  RawError,
   RequestType,
   initFetchObservable,
-  XhrCompleteContext,
+  computeStackTrace,
+  toStackTraceString,
+  monitor,
+  noop,
 } from '@datadog/browser-core'
-import { LogsConfiguration } from './configuration'
+import type { LogsConfiguration } from './configuration'
 
@@ -27,2 +28,12 @@ export function trackNetworkError(configuration: LogsConfiguration, errorObservable: Observable<RawError>) {
     if (!configuration.isIntakeUrl(request.url) && (isRejected(request) || isServerError(request))) {
+      if ('xhr' in request) {
+        computeXhrResponseData(request.xhr, configuration, onResponseDataAvailable)
+      } else if (request.response) {
+        computeFetchResponseText(request.response, configuration, onResponseDataAvailable)
+      } else if (request.error) {
+        computeFetchErrorText(request.error, configuration, onResponseDataAvailable)
+      }
+    }
+
+    function onResponseDataAvailable(responseData: unknown) {
       errorObservable.notify({
@@ -36,3 +47,3 @@ message: `${format(type)} error ${request.method} ${request.url}`,
         source: ErrorSource.NETWORK,
-        stack: truncateResponseText(request.responseText, configuration) || 'Failed to load',
+        stack: (responseData as string) || 'Failed to load',
         startClocks: request.startClocks,
@@ -51,2 +62,84 @@ })
 
+// TODO: ideally, computeXhrResponseData should always call the callback with a string instead of
+// `unknown`. But to keep backward compatibility, in the case of XHR with a `responseType` different
+// than "text", the response data should be whatever `xhr.response` is. This is a bit confusing as
+// Logs event 'stack' is expected to be a string. This should be changed in a future major version
+// as it could be a breaking change.
+export function computeXhrResponseData(
+  xhr: XMLHttpRequest,
+  configuration: LogsConfiguration,
+  callback: (responseData: unknown) => void
+) {
+  if (typeof xhr.response === 'string') {
+    callback(truncateResponseText(xhr.response, configuration))
+  } else {
+    callback(xhr.response)
+  }
+}
+
+export function computeFetchErrorText(
+  error: Error,
+  configuration: LogsConfiguration,
+  callback: (errorText: string) => void
+) {
+  callback(truncateResponseText(toStackTraceString(computeStackTrace(error)), configuration))
+}
+
+export function computeFetchResponseText(
+  response: Response,
+  configuration: LogsConfiguration,
+  callback: (responseText?: string) => void
+) {
+  if (!window.TextDecoder) {
+    // If the browser doesn't support TextDecoder, let's read the whole response then truncate it.
+    //
+    // This should only be the case on early versions of Edge (before they migrated to Chromium).
+    // Even if it could be possible to implement a workaround for the missing TextDecoder API (using
+    // a Blob and FileReader), we found another issue preventing us from reading only the first
+    // bytes from the response: contrary to other browsers, when reading from the cloned response,
+    // if the original response gets canceled, the cloned response is also canceled and we can't
+    // know about it.  In the following illustration, the promise returned by `reader.read()` may
+    // never be fulfilled:
+    //
+    // fetch('/').then((response) => {
+    //   const reader = response.clone().body.getReader()
+    //   readMore()
+    //   function readMore() {
+    //     reader.read().then(
+    //       (result) => {
+    //         if (result.done) {
+    //           console.log('done')
+    //         } else {
+    //           readMore()
+    //         }
+    //       },
+    //       () => console.log('error')
+    //     )
+    //   }
+    //   response.body.getReader().cancel()
+    // })
+    response
+      .clone()
+      .text()
+      .then(
+        monitor((text) => callback(truncateResponseText(text, configuration))),
+        monitor((error) => callback(`Unable to retrieve response: ${error as string}`))
+      )
+  } else if (!response.body) {
+    callback()
+  } else {
+    truncateResponseStream(
+      response.clone().body!,
+      configuration.requestErrorResponseLengthLimit,
+      (error, responseText) => {
+        if (error) {
+          callback(`Unable to retrieve response: ${(error as unknown) as string}`)
+        } else {
+          callback(responseText)
+        }
+      }
+    )
+  }
+}
+
 function isRejected(request: { status: number; responseType?: string }) {
@@ -60,4 +153,4 @@ return request.status === 0 && request.responseType !== 'opaque'
 
-function truncateResponseText(responseText: string | undefined, configuration: LogsConfiguration) {
-  if (responseText && responseText.length > configuration.requestErrorResponseLengthLimit) {
+function truncateResponseText(responseText: string, configuration: LogsConfiguration) {
+  if (responseText.length > configuration.requestErrorResponseLengthLimit) {
     return `${responseText.substring(0, configuration.requestErrorResponseLengthLimit)}...`
@@ -74,1 +167,82 @@ }
 }
+
+function truncateResponseStream(
+  stream: ReadableStream<Uint8Array>,
+  limit: number,
+  callback: (error?: Error, responseText?: string) => void
+) {
+  readLimitedAmountOfBytes(stream, limit, (error, bytes, limitExceeded) => {
+    if (error) {
+      callback(error)
+    } else {
+      let responseText = new TextDecoder().decode(bytes)
+      if (limitExceeded) {
+        responseText += '...'
+      }
+      callback(undefined, responseText)
+    }
+  })
+}
+
+/**
+ * Read bytes from a ReadableStream until at least `limit` bytes have been read (or until the end of
+ * the stream). The callback is invoked with the at most `limit` bytes, and indicates that the limit
+ * has been exceeded if more bytes were available.
+ */
+function readLimitedAmountOfBytes(
+  stream: ReadableStream<Uint8Array>,
+  limit: number,
+  callback: (error?: Error, bytes?: Uint8Array, limitExceeded?: boolean) => void
+) {
+  const reader = stream.getReader()
+  const chunks: Uint8Array[] = []
+  let readBytesCount = 0
+
+  readMore()
+
+  function readMore() {
+    reader.read().then(
+      monitor((result: ReadableStreamReadResult<Uint8Array>) => {
+        if (result.done) {
+          onDone()
+          return
+        }
+
+        chunks.push(result.value)
+        readBytesCount += result.value.length
+
+        if (readBytesCount > limit) {
+          onDone()
+        } else {
+          readMore()
+        }
+      }),
+      monitor((error) => callback(error))
+    )
+  }
+
+  function onDone() {
+    reader.cancel().catch(
+      // we don't care if cancel fails, but we still need to catch the error to avoid reporting it
+      // as an unhandled rejection
+      noop
+    )
+
+    let completeBuffer: Uint8Array
+    if (chunks.length === 1) {
+      // optim: if the response is small enough to fit in a single buffer (provided by the browser), just
+      // use it directly.
+      completeBuffer = chunks[0]
+    } else {
+      // else, we need to copy buffers into a larger buffer to concatenate them.
+      completeBuffer = new Uint8Array(readBytesCount)
+      let offset = 0
+      chunks.forEach((chunk) => {
+        completeBuffer.set(chunk, offset)
+        offset += chunk.length
+      })
+    }
+
+    callback(undefined, completeBuffer.slice(0, limit), completeBuffer.length > limit)
+  }
+}

src/entries/main.ts

 import { defineGlobal, getGlobalObject } from '@datadog/browser-core'
-import { LogsPublicApi, makeLogsPublicApi } from '../boot/logsPublicApi'
+import type { LogsPublicApi } from '../boot/logsPublicApi'
+import { makeLogsPublicApi } from '../boot/logsPublicApi'
 import { startLogs } from '../boot/startLogs'
@@ -4,0 +5,0 @@

src/transport/startLoggerBatch.ts

@@ -1,3 +0,4 @@
-import { Batch, Context, HttpRequest, EndpointBuilder } from '@datadog/browser-core'
-import { LogsConfiguration } from '../domain/configuration'
+import type { Context, EndpointBuilder } from '@datadog/browser-core'
+import { Batch, HttpRequest } from '@datadog/browser-core'
+import type { LogsConfiguration } from '../domain/configuration'
 
@@ -4,0 +5,0 @@ export function startLoggerBatch(configuration: LogsConfiguration) {

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increased by15.09%

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increased by21.54%

Dependency changes

• + Added@datadog/browser-core@4.2.0(transitive)

• - Removed@datadog/browser-core@4.1.0(transitive)

• Updated@datadog/browser-core@4.2.0