INNER CODE UNIT · JavaScript

createJsonParser

expressjs/body-parser · lib/types/json.js:71

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 {}
      }

      if (body[0] !== '{' && body[0] !== '[') {
        const first = firstNonWhitespaceChar(body)
        if (first !== '{' && first !== '[') {
          debug('strict violation')
          throw createStrictSyntaxError(body, first)
        }

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