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21 |
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22 | "use strict";
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23 |
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24 | Object.defineProperty(exports, "__esModule", {
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25 | value: true
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26 | });
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27 | exports.getFilenameFromContentDispositionHeader = getFilenameFromContentDispositionHeader;
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28 |
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29 | function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }
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30 |
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31 | function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance"); }
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32 |
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33 | function _iterableToArrayLimit(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
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34 |
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35 | function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
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36 |
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37 | function getFilenameFromContentDispositionHeader(contentDisposition) {
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38 | var needsEncodingFixup = true;
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39 | var tmp = toParamRegExp('filename\\*', 'i').exec(contentDisposition);
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40 |
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41 | if (tmp) {
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42 | tmp = tmp[1];
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43 | var filename = rfc2616unquote(tmp);
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44 | filename = unescape(filename);
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45 | filename = rfc5987decode(filename);
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46 | filename = rfc2047decode(filename);
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47 | return fixupEncoding(filename);
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48 | }
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49 |
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50 | tmp = rfc2231getparam(contentDisposition);
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51 |
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52 | if (tmp) {
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53 | var _filename = rfc2047decode(tmp);
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54 |
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55 | return fixupEncoding(_filename);
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56 | }
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57 |
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58 | tmp = toParamRegExp('filename', 'i').exec(contentDisposition);
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59 |
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60 | if (tmp) {
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61 | tmp = tmp[1];
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62 |
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63 | var _filename2 = rfc2616unquote(tmp);
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64 |
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65 | _filename2 = rfc2047decode(_filename2);
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66 | return fixupEncoding(_filename2);
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67 | }
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68 |
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69 | function toParamRegExp(attributePattern, flags) {
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70 | return new RegExp('(?:^|;)\\s*' + attributePattern + '\\s*=\\s*' + '(' + '[^";\\s][^;\\s]*' + '|' + '"(?:[^"\\\\]|\\\\"?)+"?' + ')', flags);
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71 | }
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72 |
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73 | function textdecode(encoding, value) {
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74 | if (encoding) {
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75 | if (!/^[\x00-\xFF]+$/.test(value)) {
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76 | return value;
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77 | }
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78 |
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79 | try {
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80 | var decoder = new TextDecoder(encoding, {
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81 | fatal: true
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82 | });
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83 | var bytes = Array.from(value, function (ch) {
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84 | return ch.charCodeAt(0) & 0xFF;
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85 | });
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86 | value = decoder.decode(new Uint8Array(bytes));
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87 | needsEncodingFixup = false;
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88 | } catch (e) {
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89 | if (/^utf-?8$/i.test(encoding)) {
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90 | try {
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91 | value = decodeURIComponent(escape(value));
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92 | needsEncodingFixup = false;
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93 | } catch (err) {}
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94 | }
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95 | }
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96 | }
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97 |
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98 | return value;
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99 | }
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100 |
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101 | function fixupEncoding(value) {
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102 | if (needsEncodingFixup && /[\x80-\xff]/.test(value)) {
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103 | value = textdecode('utf-8', value);
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104 |
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105 | if (needsEncodingFixup) {
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106 | value = textdecode('iso-8859-1', value);
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107 | }
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108 | }
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109 |
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110 | return value;
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111 | }
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112 |
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113 | function rfc2231getparam(contentDisposition) {
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114 | var matches = [],
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115 | match;
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116 | var iter = toParamRegExp('filename\\*((?!0\\d)\\d+)(\\*?)', 'ig');
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117 |
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118 | while ((match = iter.exec(contentDisposition)) !== null) {
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119 | var _match = match,
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120 | _match2 = _slicedToArray(_match, 4),
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121 | n = _match2[1],
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122 | quot = _match2[2],
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123 | part = _match2[3];
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124 |
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125 | n = parseInt(n, 10);
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126 |
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127 | if (n in matches) {
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128 | if (n === 0) {
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129 | break;
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130 | }
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131 |
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132 | continue;
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133 | }
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134 |
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135 | matches[n] = [quot, part];
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136 | }
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137 |
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138 | var parts = [];
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139 |
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140 | for (var n = 0; n < matches.length; ++n) {
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141 | if (!(n in matches)) {
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142 | break;
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143 | }
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144 |
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145 | var _matches$n = _slicedToArray(matches[n], 2),
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146 | quot = _matches$n[0],
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147 | part = _matches$n[1];
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148 |
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149 | part = rfc2616unquote(part);
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150 |
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151 | if (quot) {
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152 | part = unescape(part);
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153 |
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154 | if (n === 0) {
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155 | part = rfc5987decode(part);
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156 | }
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157 | }
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158 |
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159 | parts.push(part);
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160 | }
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161 |
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162 | return parts.join('');
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163 | }
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164 |
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165 | function rfc2616unquote(value) {
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166 | if (value.startsWith('"')) {
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167 | var parts = value.slice(1).split('\\"');
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168 |
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169 | for (var i = 0; i < parts.length; ++i) {
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170 | var quotindex = parts[i].indexOf('"');
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171 |
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172 | if (quotindex !== -1) {
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173 | parts[i] = parts[i].slice(0, quotindex);
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174 | parts.length = i + 1;
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175 | }
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176 |
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177 | parts[i] = parts[i].replace(/\\(.)/g, '$1');
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178 | }
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179 |
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180 | value = parts.join('"');
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181 | }
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182 |
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183 | return value;
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184 | }
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185 |
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186 | function rfc5987decode(extvalue) {
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187 | var encodingend = extvalue.indexOf('\'');
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188 |
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189 | if (encodingend === -1) {
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190 | return extvalue;
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191 | }
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192 |
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193 | var encoding = extvalue.slice(0, encodingend);
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194 | var langvalue = extvalue.slice(encodingend + 1);
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195 | var value = langvalue.replace(/^[^']*'/, '');
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196 | return textdecode(encoding, value);
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197 | }
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198 |
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199 | function rfc2047decode(value) {
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200 | if (!value.startsWith('=?') || /[\x00-\x19\x80-\xff]/.test(value)) {
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201 | return value;
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202 | }
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203 |
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204 | return value.replace(/=\?([\w-]*)\?([QqBb])\?((?:[^?]|\?(?!=))*)\?=/g, function (_, charset, encoding, text) {
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205 | if (encoding === 'q' || encoding === 'Q') {
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206 | text = text.replace(/_/g, ' ');
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207 | text = text.replace(/=([0-9a-fA-F]{2})/g, function (_, hex) {
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208 | return String.fromCharCode(parseInt(hex, 16));
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209 | });
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210 | return textdecode(charset, text);
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211 | }
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212 |
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213 | try {
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214 | text = atob(text);
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215 | } catch (e) {}
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216 |
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217 | return textdecode(charset, text);
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218 | });
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219 | }
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220 |
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221 | return '';
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222 | } |
\ | No newline at end of file |