1 | 'use strict';
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2 |
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3 | var utils = require('./utils');
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4 | var formats = require('./formats');
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5 | var has = Object.prototype.hasOwnProperty;
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6 |
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7 | var arrayPrefixGenerators = {
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8 | brackets: function brackets(prefix) {
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9 | return prefix + '[]';
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10 | },
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11 | comma: 'comma',
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12 | indices: function indices(prefix, key) {
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13 | return prefix + '[' + key + ']';
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14 | },
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15 | repeat: function repeat(prefix) {
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16 | return prefix;
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17 | }
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18 | };
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19 |
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20 | var isArray = Array.isArray;
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21 | var push = Array.prototype.push;
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22 | var pushToArray = function (arr, valueOrArray) {
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23 | push.apply(arr, isArray(valueOrArray) ? valueOrArray : [valueOrArray]);
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24 | };
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25 |
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26 | var toISO = Date.prototype.toISOString;
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27 |
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28 | var defaultFormat = formats['default'];
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29 | var defaults = {
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30 | addQueryPrefix: false,
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31 | allowDots: false,
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32 | charset: 'utf-8',
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33 | charsetSentinel: false,
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34 | delimiter: '&',
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35 | encode: true,
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36 | encoder: utils.encode,
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37 | encodeValuesOnly: false,
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38 | format: defaultFormat,
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39 | formatter: formats.formatters[defaultFormat],
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40 |
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41 | indices: false,
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42 | serializeDate: function serializeDate(date) {
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43 | return toISO.call(date);
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44 | },
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45 | skipNulls: false,
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46 | strictNullHandling: false
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47 | };
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48 |
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49 | var isNonNullishPrimitive = function isNonNullishPrimitive(v) {
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50 | return typeof v === 'string'
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51 | || typeof v === 'number'
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52 | || typeof v === 'boolean'
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53 | || typeof v === 'symbol'
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54 | || typeof v === 'bigint';
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55 | };
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56 |
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57 | var stringify = function stringify(
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58 | object,
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59 | prefix,
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60 | generateArrayPrefix,
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61 | strictNullHandling,
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62 | skipNulls,
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63 | encoder,
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64 | filter,
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65 | sort,
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66 | allowDots,
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67 | serializeDate,
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68 | formatter,
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69 | encodeValuesOnly,
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70 | charset
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71 | ) {
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72 | var obj = object;
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73 | if (typeof filter === 'function') {
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74 | obj = filter(prefix, obj);
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75 | } else if (obj instanceof Date) {
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76 | obj = serializeDate(obj);
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77 | } else if (generateArrayPrefix === 'comma' && isArray(obj)) {
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78 | obj = utils.maybeMap(obj, function (value) {
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79 | if (value instanceof Date) {
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80 | return serializeDate(value);
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81 | }
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82 | return value;
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83 | }).join(',');
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84 | }
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85 |
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86 | if (obj === null) {
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87 | if (strictNullHandling) {
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88 | return encoder && !encodeValuesOnly ? encoder(prefix, defaults.encoder, charset, 'key') : prefix;
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89 | }
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90 |
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91 | obj = '';
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92 | }
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93 |
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94 | if (isNonNullishPrimitive(obj) || utils.isBuffer(obj)) {
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95 | if (encoder) {
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96 | var keyValue = encodeValuesOnly ? prefix : encoder(prefix, defaults.encoder, charset, 'key');
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97 | return [formatter(keyValue) + '=' + formatter(encoder(obj, defaults.encoder, charset, 'value'))];
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98 | }
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99 | return [formatter(prefix) + '=' + formatter(String(obj))];
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100 | }
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101 |
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102 | var values = [];
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103 |
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104 | if (typeof obj === 'undefined') {
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105 | return values;
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106 | }
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107 |
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108 | var objKeys;
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109 | if (isArray(filter)) {
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110 | objKeys = filter;
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111 | } else {
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112 | var keys = Object.keys(obj);
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113 | objKeys = sort ? keys.sort(sort) : keys;
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114 | }
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115 |
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116 | for (var i = 0; i < objKeys.length; ++i) {
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117 | var key = objKeys[i];
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118 | var value = obj[key];
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119 |
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120 | if (skipNulls && value === null) {
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121 | continue;
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122 | }
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123 |
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124 | var keyPrefix = isArray(obj)
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125 | ? typeof generateArrayPrefix === 'function' ? generateArrayPrefix(prefix, key) : prefix
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126 | : prefix + (allowDots ? '.' + key : '[' + key + ']');
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127 |
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128 | pushToArray(values, stringify(
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129 | value,
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130 | keyPrefix,
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131 | generateArrayPrefix,
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132 | strictNullHandling,
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133 | skipNulls,
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134 | encoder,
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135 | filter,
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136 | sort,
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137 | allowDots,
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138 | serializeDate,
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139 | formatter,
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140 | encodeValuesOnly,
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141 | charset
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142 | ));
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143 | }
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144 |
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145 | return values;
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146 | };
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147 |
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148 | var normalizeStringifyOptions = function normalizeStringifyOptions(opts) {
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149 | if (!opts) {
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150 | return defaults;
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151 | }
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152 |
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153 | if (opts.encoder !== null && opts.encoder !== undefined && typeof opts.encoder !== 'function') {
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154 | throw new TypeError('Encoder has to be a function.');
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155 | }
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156 |
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157 | var charset = opts.charset || defaults.charset;
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158 | if (typeof opts.charset !== 'undefined' && opts.charset !== 'utf-8' && opts.charset !== 'iso-8859-1') {
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159 | throw new TypeError('The charset option must be either utf-8, iso-8859-1, or undefined');
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160 | }
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161 |
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162 | var format = formats['default'];
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163 | if (typeof opts.format !== 'undefined') {
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164 | if (!has.call(formats.formatters, opts.format)) {
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165 | throw new TypeError('Unknown format option provided.');
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166 | }
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167 | format = opts.format;
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168 | }
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169 | var formatter = formats.formatters[format];
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170 |
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171 | var filter = defaults.filter;
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172 | if (typeof opts.filter === 'function' || isArray(opts.filter)) {
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173 | filter = opts.filter;
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174 | }
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175 |
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176 | return {
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177 | addQueryPrefix: typeof opts.addQueryPrefix === 'boolean' ? opts.addQueryPrefix : defaults.addQueryPrefix,
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178 | allowDots: typeof opts.allowDots === 'undefined' ? defaults.allowDots : !!opts.allowDots,
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179 | charset: charset,
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180 | charsetSentinel: typeof opts.charsetSentinel === 'boolean' ? opts.charsetSentinel : defaults.charsetSentinel,
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181 | delimiter: typeof opts.delimiter === 'undefined' ? defaults.delimiter : opts.delimiter,
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182 | encode: typeof opts.encode === 'boolean' ? opts.encode : defaults.encode,
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183 | encoder: typeof opts.encoder === 'function' ? opts.encoder : defaults.encoder,
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184 | encodeValuesOnly: typeof opts.encodeValuesOnly === 'boolean' ? opts.encodeValuesOnly : defaults.encodeValuesOnly,
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185 | filter: filter,
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186 | formatter: formatter,
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187 | serializeDate: typeof opts.serializeDate === 'function' ? opts.serializeDate : defaults.serializeDate,
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188 | skipNulls: typeof opts.skipNulls === 'boolean' ? opts.skipNulls : defaults.skipNulls,
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189 | sort: typeof opts.sort === 'function' ? opts.sort : null,
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190 | strictNullHandling: typeof opts.strictNullHandling === 'boolean' ? opts.strictNullHandling : defaults.strictNullHandling
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191 | };
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192 | };
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193 |
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194 | module.exports = function (object, opts) {
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195 | var obj = object;
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196 | var options = normalizeStringifyOptions(opts);
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197 |
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198 | var objKeys;
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199 | var filter;
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200 |
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201 | if (typeof options.filter === 'function') {
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202 | filter = options.filter;
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203 | obj = filter('', obj);
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204 | } else if (isArray(options.filter)) {
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205 | filter = options.filter;
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206 | objKeys = filter;
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207 | }
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208 |
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209 | var keys = [];
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210 |
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211 | if (typeof obj !== 'object' || obj === null) {
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212 | return '';
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213 | }
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214 |
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215 | var arrayFormat;
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216 | if (opts && opts.arrayFormat in arrayPrefixGenerators) {
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217 | arrayFormat = opts.arrayFormat;
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218 | } else if (opts && 'indices' in opts) {
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219 | arrayFormat = opts.indices ? 'indices' : 'repeat';
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220 | } else {
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221 | arrayFormat = 'indices';
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222 | }
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223 |
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224 | var generateArrayPrefix = arrayPrefixGenerators[arrayFormat];
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225 |
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226 | if (!objKeys) {
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227 | objKeys = Object.keys(obj);
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228 | }
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229 |
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230 | if (options.sort) {
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231 | objKeys.sort(options.sort);
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232 | }
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233 |
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234 | for (var i = 0; i < objKeys.length; ++i) {
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235 | var key = objKeys[i];
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236 |
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237 | if (options.skipNulls && obj[key] === null) {
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238 | continue;
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239 | }
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240 | pushToArray(keys, stringify(
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241 | obj[key],
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242 | key,
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243 | generateArrayPrefix,
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244 | options.strictNullHandling,
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245 | options.skipNulls,
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246 | options.encode ? options.encoder : null,
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247 | options.filter,
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248 | options.sort,
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249 | options.allowDots,
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250 | options.serializeDate,
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251 | options.formatter,
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252 | options.encodeValuesOnly,
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253 | options.charset
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254 | ));
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255 | }
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256 |
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257 | var joined = keys.join(options.delimiter);
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258 | var prefix = options.addQueryPrefix === true ? '?' : '';
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259 |
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260 | if (options.charsetSentinel) {
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261 | if (options.charset === 'iso-8859-1') {
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262 |
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263 | prefix += 'utf8=%26%2310003%3B&';
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264 | } else {
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265 |
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266 | prefix += 'utf8=%E2%9C%93&';
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267 | }
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268 | }
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269 |
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270 | return joined.length > 0 ? prefix + joined : '';
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271 | };
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