@sentry/core/build/esm/utils/baggage.js

Base implementation for all Sentry JavaScript SDKs

import { DEBUG_BUILD } from '../debug-build.js';
import { debug } from './debug-logger.js';
import { isString } from './is.js';

const SENTRY_BAGGAGE_KEY_PREFIX = "sentry-";
const SENTRY_BAGGAGE_KEY_PREFIX_REGEX = /^sentry-/;
const MAX_BAGGAGE_STRING_LENGTH = 8192;
function baggageHeaderToDynamicSamplingContext(baggageHeader) {
  const baggageObject = parseBaggageHeader(baggageHeader);
  if (!baggageObject) {
    return void 0;
  }
  const dynamicSamplingContext = Object.entries(baggageObject).reduce((acc, [key, value]) => {
    if (key.startsWith(SENTRY_BAGGAGE_KEY_PREFIX)) {
      const nonPrefixedKey = key.slice(SENTRY_BAGGAGE_KEY_PREFIX.length);
      acc[nonPrefixedKey] = value;
    }
    return acc;
  }, {});
  if (Object.keys(dynamicSamplingContext).length > 0) {
    return dynamicSamplingContext;
  } else {
    return void 0;
  }
}
function dynamicSamplingContextToSentryBaggageHeader(dynamicSamplingContext) {
  if (!dynamicSamplingContext) {
    return void 0;
  }
  const sentryPrefixedDSC = Object.entries(dynamicSamplingContext).reduce(
    (acc, [dscKey, dscValue]) => {
      if (dscValue) {
        acc[`${SENTRY_BAGGAGE_KEY_PREFIX}${dscKey}`] = dscValue;
      }
      return acc;
    },
    {}
  );
  return objectToBaggageHeader(sentryPrefixedDSC);
}
function parseBaggageHeader(baggageHeader) {
  if (!baggageHeader || !isString(baggageHeader) && !Array.isArray(baggageHeader)) {
    return void 0;
  }
  if (Array.isArray(baggageHeader)) {
    return baggageHeader.reduce((acc, curr) => {
      const currBaggageObject = baggageHeaderToObject(curr);
      Object.entries(currBaggageObject).forEach(([key, value]) => {
        acc[key] = value;
      });
      return acc;
    }, {});
  }
  return baggageHeaderToObject(baggageHeader);
}
function baggageHeaderToObject(baggageHeader) {
  return baggageHeader.split(",").map((baggageEntry) => {
    const eqIdx = baggageEntry.indexOf("=");
    if (eqIdx === -1) {
      return [];
    }
    const key = baggageEntry.slice(0, eqIdx);
    const value = baggageEntry.slice(eqIdx + 1);
    return [key, value].map((keyOrValue) => {
      try {
        return decodeURIComponent(keyOrValue.trim());
      } catch {
        return;
      }
    });
  }).reduce((acc, [key, value]) => {
    if (key && value) {
      acc[key] = value;
    }
    return acc;
  }, {});
}
function objectToBaggageHeader(object) {
  if (Object.keys(object).length === 0) {
    return void 0;
  }
  return Object.entries(object).reduce((baggageHeader, [objectKey, objectValue], currentIndex) => {
    const baggageEntry = `${encodeURIComponent(objectKey)}=${encodeURIComponent(objectValue)}`;
    const newBaggageHeader = currentIndex === 0 ? baggageEntry : `${baggageHeader},${baggageEntry}`;
    if (newBaggageHeader.length > MAX_BAGGAGE_STRING_LENGTH) {
      DEBUG_BUILD && debug.warn(
        `Not adding key: ${objectKey} with val: ${objectValue} to baggage header due to exceeding baggage size limits.`
      );
      return baggageHeader;
    } else {
      return newBaggageHeader;
    }
  }, "");
}
function mergeBaggageHeaders(existing, incoming) {
  if (!existing) {
    return incoming;
  }
  const existingEntries = parseBaggageHeader(existing);
  const incomingEntries = parseBaggageHeader(incoming);
  if (!incomingEntries) {
    return existing;
  }
  const merged = {};
  let hasNewSentryEntries = false;
  const newSentryEntries = {};
  const newNonSentryEntries = {};
  for (const [key, value] of Object.entries(incomingEntries)) {
    if (key.startsWith(SENTRY_BAGGAGE_KEY_PREFIX)) {
      newSentryEntries[key] = value;
      hasNewSentryEntries = true;
    } else {
      newNonSentryEntries[key] = value;
    }
  }
  if (existingEntries) {
    for (const [key, value] of Object.entries(existingEntries)) {
      if (!hasNewSentryEntries || !key.startsWith(SENTRY_BAGGAGE_KEY_PREFIX)) {
        merged[key] = value;
      }
    }
  }
  if (hasNewSentryEntries) {
    Object.assign(merged, newSentryEntries);
  }
  for (const [key, value] of Object.entries(newNonSentryEntries)) {
    merged[key] ?? (merged[key] = value);
  }
  return objectToBaggageHeader(merged);
}

export { MAX_BAGGAGE_STRING_LENGTH, SENTRY_BAGGAGE_KEY_PREFIX, SENTRY_BAGGAGE_KEY_PREFIX_REGEX, baggageHeaderToDynamicSamplingContext, dynamicSamplingContextToSentryBaggageHeader, mergeBaggageHeaders, objectToBaggageHeader, parseBaggageHeader };
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