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