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- // Matches the scheme of a URL, eg "http://"
- const schemeRegex = /^[\w+.-]+:\/\//;
- /**
- * Matches the parts of a URL:
- * 1. Scheme, including ":", guaranteed.
- * 2. User/password, including "@", optional.
- * 3. Host, guaranteed.
- * 4. Port, including ":", optional.
- * 5. Path, including "/", optional.
- * 6. Query, including "?", optional.
- * 7. Hash, including "#", optional.
- */
- const urlRegex = /^([\w+.-]+:)\/\/([^@/#?]*@)?([^:/#?]*)(:\d+)?(\/[^#?]*)?(\?[^#]*)?(#.*)?/;
- /**
- * File URLs are weird. They dont' need the regular `//` in the scheme, they may or may not start
- * with a leading `/`, they can have a domain (but only if they don't start with a Windows drive).
- *
- * 1. Host, optional.
- * 2. Path, which may include "/", guaranteed.
- * 3. Query, including "?", optional.
- * 4. Hash, including "#", optional.
- */
- const fileRegex = /^file:(?:\/\/((?![a-z]:)[^/#?]*)?)?(\/?[^#?]*)(\?[^#]*)?(#.*)?/i;
- function isAbsoluteUrl(input) {
- return schemeRegex.test(input);
- }
- function isSchemeRelativeUrl(input) {
- return input.startsWith('//');
- }
- function isAbsolutePath(input) {
- return input.startsWith('/');
- }
- function isFileUrl(input) {
- return input.startsWith('file:');
- }
- function isRelative(input) {
- return /^[.?#]/.test(input);
- }
- function parseAbsoluteUrl(input) {
- const match = urlRegex.exec(input);
- return makeUrl(match[1], match[2] || '', match[3], match[4] || '', match[5] || '/', match[6] || '', match[7] || '');
- }
- function parseFileUrl(input) {
- const match = fileRegex.exec(input);
- const path = match[2];
- return makeUrl('file:', '', match[1] || '', '', isAbsolutePath(path) ? path : '/' + path, match[3] || '', match[4] || '');
- }
- function makeUrl(scheme, user, host, port, path, query, hash) {
- return {
- scheme,
- user,
- host,
- port,
- path,
- query,
- hash,
- type: 7 /* Absolute */,
- };
- }
- function parseUrl(input) {
- if (isSchemeRelativeUrl(input)) {
- const url = parseAbsoluteUrl('http:' + input);
- url.scheme = '';
- url.type = 6 /* SchemeRelative */;
- return url;
- }
- if (isAbsolutePath(input)) {
- const url = parseAbsoluteUrl('http://foo.com' + input);
- url.scheme = '';
- url.host = '';
- url.type = 5 /* AbsolutePath */;
- return url;
- }
- if (isFileUrl(input))
- return parseFileUrl(input);
- if (isAbsoluteUrl(input))
- return parseAbsoluteUrl(input);
- const url = parseAbsoluteUrl('http://foo.com/' + input);
- url.scheme = '';
- url.host = '';
- url.type = input
- ? input.startsWith('?')
- ? 3 /* Query */
- : input.startsWith('#')
- ? 2 /* Hash */
- : 4 /* RelativePath */
- : 1 /* Empty */;
- return url;
- }
- function stripPathFilename(path) {
- // If a path ends with a parent directory "..", then it's a relative path with excess parent
- // paths. It's not a file, so we can't strip it.
- if (path.endsWith('/..'))
- return path;
- const index = path.lastIndexOf('/');
- return path.slice(0, index + 1);
- }
- function mergePaths(url, base) {
- normalizePath(base, base.type);
- // If the path is just a "/", then it was an empty path to begin with (remember, we're a relative
- // path).
- if (url.path === '/') {
- url.path = base.path;
- }
- else {
- // Resolution happens relative to the base path's directory, not the file.
- url.path = stripPathFilename(base.path) + url.path;
- }
- }
- /**
- * The path can have empty directories "//", unneeded parents "foo/..", or current directory
- * "foo/.". We need to normalize to a standard representation.
- */
- function normalizePath(url, type) {
- const rel = type <= 4 /* RelativePath */;
- const pieces = url.path.split('/');
- // We need to preserve the first piece always, so that we output a leading slash. The item at
- // pieces[0] is an empty string.
- let pointer = 1;
- // Positive is the number of real directories we've output, used for popping a parent directory.
- // Eg, "foo/bar/.." will have a positive 2, and we can decrement to be left with just "foo".
- let positive = 0;
- // We need to keep a trailing slash if we encounter an empty directory (eg, splitting "foo/" will
- // generate `["foo", ""]` pieces). And, if we pop a parent directory. But once we encounter a
- // real directory, we won't need to append, unless the other conditions happen again.
- let addTrailingSlash = false;
- for (let i = 1; i < pieces.length; i++) {
- const piece = pieces[i];
- // An empty directory, could be a trailing slash, or just a double "//" in the path.
- if (!piece) {
- addTrailingSlash = true;
- continue;
- }
- // If we encounter a real directory, then we don't need to append anymore.
- addTrailingSlash = false;
- // A current directory, which we can always drop.
- if (piece === '.')
- continue;
- // A parent directory, we need to see if there are any real directories we can pop. Else, we
- // have an excess of parents, and we'll need to keep the "..".
- if (piece === '..') {
- if (positive) {
- addTrailingSlash = true;
- positive--;
- pointer--;
- }
- else if (rel) {
- // If we're in a relativePath, then we need to keep the excess parents. Else, in an absolute
- // URL, protocol relative URL, or an absolute path, we don't need to keep excess.
- pieces[pointer++] = piece;
- }
- continue;
- }
- // We've encountered a real directory. Move it to the next insertion pointer, which accounts for
- // any popped or dropped directories.
- pieces[pointer++] = piece;
- positive++;
- }
- let path = '';
- for (let i = 1; i < pointer; i++) {
- path += '/' + pieces[i];
- }
- if (!path || (addTrailingSlash && !path.endsWith('/..'))) {
- path += '/';
- }
- url.path = path;
- }
- /**
- * Attempts to resolve `input` URL/path relative to `base`.
- */
- function resolve(input, base) {
- if (!input && !base)
- return '';
- const url = parseUrl(input);
- let inputType = url.type;
- if (base && inputType !== 7 /* Absolute */) {
- const baseUrl = parseUrl(base);
- const baseType = baseUrl.type;
- switch (inputType) {
- case 1 /* Empty */:
- url.hash = baseUrl.hash;
- // fall through
- case 2 /* Hash */:
- url.query = baseUrl.query;
- // fall through
- case 3 /* Query */:
- case 4 /* RelativePath */:
- mergePaths(url, baseUrl);
- // fall through
- case 5 /* AbsolutePath */:
- // The host, user, and port are joined, you can't copy one without the others.
- url.user = baseUrl.user;
- url.host = baseUrl.host;
- url.port = baseUrl.port;
- // fall through
- case 6 /* SchemeRelative */:
- // The input doesn't have a schema at least, so we need to copy at least that over.
- url.scheme = baseUrl.scheme;
- }
- if (baseType > inputType)
- inputType = baseType;
- }
- normalizePath(url, inputType);
- const queryHash = url.query + url.hash;
- switch (inputType) {
- // This is impossible, because of the empty checks at the start of the function.
- // case UrlType.Empty:
- case 2 /* Hash */:
- case 3 /* Query */:
- return queryHash;
- case 4 /* RelativePath */: {
- // The first char is always a "/", and we need it to be relative.
- const path = url.path.slice(1);
- if (!path)
- return queryHash || '.';
- if (isRelative(base || input) && !isRelative(path)) {
- // If base started with a leading ".", or there is no base and input started with a ".",
- // then we need to ensure that the relative path starts with a ".". We don't know if
- // relative starts with a "..", though, so check before prepending.
- return './' + path + queryHash;
- }
- return path + queryHash;
- }
- case 5 /* AbsolutePath */:
- return url.path + queryHash;
- default:
- return url.scheme + '//' + url.user + url.host + url.port + url.path + queryHash;
- }
- }
- export { resolve as default };
- //# sourceMappingURL=resolve-uri.mjs.map
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