Function createJsonParser

lib/types/json.js:71–118

* Create a JSON parse function * * @param {object} [options] * @return {function} * @private

(options)

 * @private
 */
function createJsonParser (options) {
  const reviver = options?.reviver
  const strict = options?.strict !== false

  if (strict) {
    return function parse (body) {
      if (body.length === 0) {
        // special-case empty json body, as it's a common client-side mistake
        // TODO: maybe make this configurable or part of "strict" option
        return {}
      }

      const first = firstchar(body)
      if (first !== '{' && first !== '[') {
        debug('strict violation')
        throw createStrictSyntaxError(body, first)
      }

      try {
        debug('parse json')
        return JSON.parse(body, reviver)
      } catch (e) {
        throw normalizeJsonSyntaxError(e, {
          message: e.message,
          stack: e.stack
        })
      }
    }
  }

  return function parse (body) {
    if (body.length === 0) {
      // special-case empty json body, as it's a common client-side mistake
      // TODO: maybe make this configurable or part of "strict" option
      return {}
    }

    try {
      debug('parse json')
      return JSON.parse(body, reviver)
    } catch (e) {
      throw normalizeJsonSyntaxError(e, {
        message: e.message,
        stack: e.stack
      })
    }
  }
}

/**
 * Create strict violation syntax error matching native error.