123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179 |
- 'use strict';
- var utils = require('../utils');
- var AxiosError = require('../core/AxiosError');
- var envFormData = require('../env/classes/FormData');
- function isVisitable(thing) {
- return utils.isPlainObject(thing) || utils.isArray(thing);
- }
- function removeBrackets(key) {
- return utils.endsWith(key, '[]') ? key.slice(0, -2) : key;
- }
- function renderKey(path, key, dots) {
- if (!path) return key;
- return path.concat(key).map(function each(token, i) {
- // eslint-disable-next-line no-param-reassign
- token = removeBrackets(token);
- return !dots && i ? '[' + token + ']' : token;
- }).join(dots ? '.' : '');
- }
- function isFlatArray(arr) {
- return utils.isArray(arr) && !arr.some(isVisitable);
- }
- var predicates = utils.toFlatObject(utils, {}, null, function filter(prop) {
- return /^is[A-Z]/.test(prop);
- });
- function isSpecCompliant(thing) {
- return thing && utils.isFunction(thing.append) && thing[Symbol.toStringTag] === 'FormData' && thing[Symbol.iterator];
- }
- /**
- * Convert a data object to FormData
- * @param {Object} obj
- * @param {?Object} [formData]
- * @param {?Object} [options]
- * @param {Function} [options.visitor]
- * @param {Boolean} [options.metaTokens = true]
- * @param {Boolean} [options.dots = false]
- * @param {?Boolean} [options.indexes = false]
- * @returns {Object}
- **/
- function toFormData(obj, formData, options) {
- if (!utils.isObject(obj)) {
- throw new TypeError('target must be an object');
- }
- // eslint-disable-next-line no-param-reassign
- formData = formData || new (envFormData || FormData)();
- // eslint-disable-next-line no-param-reassign
- options = utils.toFlatObject(options, {
- metaTokens: true,
- dots: false,
- indexes: false
- }, false, function defined(option, source) {
- // eslint-disable-next-line no-eq-null,eqeqeq
- return !utils.isUndefined(source[option]);
- });
- var metaTokens = options.metaTokens;
- // eslint-disable-next-line no-use-before-define
- var visitor = options.visitor || defaultVisitor;
- var dots = options.dots;
- var indexes = options.indexes;
- var _Blob = options.Blob || typeof Blob !== 'undefined' && Blob;
- var useBlob = _Blob && isSpecCompliant(formData);
- if (!utils.isFunction(visitor)) {
- throw new TypeError('visitor must be a function');
- }
- function convertValue(value) {
- if (value === null) return '';
- if (utils.isDate(value)) {
- return value.toISOString();
- }
- if (!useBlob && utils.isBlob(value)) {
- throw new AxiosError('Blob is not supported. Use a Buffer instead.');
- }
- if (utils.isArrayBuffer(value) || utils.isTypedArray(value)) {
- return useBlob && typeof Blob === 'function' ? new Blob([value]) : Buffer.from(value);
- }
- return value;
- }
- /**
- *
- * @param {*} value
- * @param {String|Number} key
- * @param {Array<String|Number>} path
- * @this {FormData}
- * @returns {boolean} return true to visit the each prop of the value recursively
- */
- function defaultVisitor(value, key, path) {
- var arr = value;
- if (value && !path && typeof value === 'object') {
- if (utils.endsWith(key, '{}')) {
- // eslint-disable-next-line no-param-reassign
- key = metaTokens ? key : key.slice(0, -2);
- // eslint-disable-next-line no-param-reassign
- value = JSON.stringify(value);
- } else if (
- (utils.isArray(value) && isFlatArray(value)) ||
- (utils.isFileList(value) || utils.endsWith(key, '[]') && (arr = utils.toArray(value))
- )) {
- // eslint-disable-next-line no-param-reassign
- key = removeBrackets(key);
- arr.forEach(function each(el, index) {
- !utils.isUndefined(el) && formData.append(
- // eslint-disable-next-line no-nested-ternary
- indexes === true ? renderKey([key], index, dots) : (indexes === null ? key : key + '[]'),
- convertValue(el)
- );
- });
- return false;
- }
- }
- if (isVisitable(value)) {
- return true;
- }
- formData.append(renderKey(path, key, dots), convertValue(value));
- return false;
- }
- var stack = [];
- var exposedHelpers = Object.assign(predicates, {
- defaultVisitor: defaultVisitor,
- convertValue: convertValue,
- isVisitable: isVisitable
- });
- function build(value, path) {
- if (utils.isUndefined(value)) return;
- if (stack.indexOf(value) !== -1) {
- throw Error('Circular reference detected in ' + path.join('.'));
- }
- stack.push(value);
- utils.forEach(value, function each(el, key) {
- var result = !utils.isUndefined(el) && visitor.call(
- formData, el, utils.isString(key) ? key.trim() : key, path, exposedHelpers
- );
- if (result === true) {
- build(el, path ? path.concat(key) : [key]);
- }
- });
- stack.pop();
- }
- if (!utils.isObject(obj)) {
- throw new TypeError('data must be an object');
- }
- build(obj);
- return formData;
- }
- module.exports = toFormData;
|