67 lines
1.7 KiB
JavaScript
67 lines
1.7 KiB
JavaScript
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/**
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* Module dependencies.
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*/
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var sep = require('path').sep || '/';
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/**
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* Module exports.
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*/
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module.exports = fileUriToPath;
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/**
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* File URI to Path function.
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*
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* @param {String} uri
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* @return {String} path
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* @api public
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*/
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function fileUriToPath (uri) {
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if ('string' != typeof uri ||
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uri.length <= 7 ||
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'file://' != uri.substring(0, 7)) {
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throw new TypeError('must pass in a file:// URI to convert to a file path');
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}
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var rest = decodeURI(uri.substring(7));
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var firstSlash = rest.indexOf('/');
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var host = rest.substring(0, firstSlash);
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var path = rest.substring(firstSlash + 1);
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// 2. Scheme Definition
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// As a special case, <host> can be the string "localhost" or the empty
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// string; this is interpreted as "the machine from which the URL is
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// being interpreted".
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if ('localhost' == host) host = '';
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if (host) {
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host = sep + sep + host;
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}
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// 3.2 Drives, drive letters, mount points, file system root
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// Drive letters are mapped into the top of a file URI in various ways,
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// depending on the implementation; some applications substitute
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// vertical bar ("|") for the colon after the drive letter, yielding
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// "file:///c|/tmp/test.txt". In some cases, the colon is left
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// unchanged, as in "file:///c:/tmp/test.txt". In other cases, the
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// colon is simply omitted, as in "file:///c/tmp/test.txt".
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path = path.replace(/^(.+)\|/, '$1:');
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// for Windows, we need to invert the path separators from what a URI uses
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if (sep == '\\') {
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path = path.replace(/\//g, '\\');
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}
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if (/^.+\:/.test(path)) {
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// has Windows drive at beginning of path
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} else {
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// unix path…
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path = sep + path;
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}
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return host + path;
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}
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