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1 files changed, 100 insertions, 0 deletions

diff --git a/node_modules/body-parser/lib/utils.js b/node_modules/body-parser/lib/utils.js
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+++ b/node_modules/body-parser/lib/utils.js
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+'use strict'
+
+/**
+ * Module dependencies.
+ */
+
+const bytes = require('bytes')
+const contentType = require('content-type')
+const typeis = require('type-is')
+
+/**
+ * Module exports.
+ */
+module.exports = {
+  getCharset,
+  normalizeOptions,
+  passthrough
+}
+
+/**
+ * Get the charset of a request.
+ *
+ * @param {Object} req
+ * @returns {string | undefined}
+ * @private
+ */
+function getCharset (req) {
+  const header = req.headers['content-type']
+  if (!header) return undefined
+  return contentType.parse(header).parameters.charset?.toLowerCase()
+}
+
+/**
+ * Get the simple type checker.
+ *
+ * @param {string | string[]} type
+ * @returns {Function}
+ * @private
+ */
+function typeChecker (type) {
+  return function checkType (req) {
+    return Boolean(typeis(req, type))
+  }
+}
+
+/**
+ * Normalizes the common options for all parsers.
+ *
+ * @param {Object} options options to normalize
+ * @param {string | string[] | Function} defaultType default content type(s) or a function to determine it
+ * @returns {Object}
+ * @private
+ */
+function normalizeOptions (options, defaultType) {
+  if (!defaultType) {
+    // Parsers must define a default content type
+    throw new TypeError('defaultType must be provided')
+  }
+
+  const inflate = options?.inflate !== false
+  const limit = typeof options?.limit === 'undefined' || options?.limit === null
+    ? 102400 // 100kb default
+    : bytes.parse(options.limit)
+  const type = options?.type || defaultType
+  const verify = options?.verify || false
+  const defaultCharset = options?.defaultCharset || 'utf-8'
+
+  if (limit === null) {
+    throw new TypeError(`option limit "${String(options.limit)}" is invalid`)
+  }
+
+  if (verify !== false && typeof verify !== 'function') {
+    throw new TypeError('option verify must be function')
+  }
+
+  // create the appropriate type checking function
+  const shouldParse = typeof type !== 'function'
+    ? typeChecker(type)
+    : type
+
+  return {
+    inflate,
+    limit,
+    verify,
+    defaultCharset,
+    shouldParse
+  }
+}
+
+/**
+ * Passthrough function that returns input unchanged.
+ * Used by parsers that don't need to transform the data.
+ *
+ * @param {*} value
+ * @returns {*}
+ * @private
+ */
+function passthrough (value) {
+  return value
+}