| (function (global, factory) { |
| typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : |
| typeof define === 'function' && define.amd ? define(factory) : |
| (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.resolveURI = factory()); |
| })(this, (function () { 'use strict'; |
| |
| // 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; |
| var UrlType; |
| (function (UrlType) { |
| UrlType[UrlType["Empty"] = 1] = "Empty"; |
| UrlType[UrlType["Hash"] = 2] = "Hash"; |
| UrlType[UrlType["Query"] = 3] = "Query"; |
| UrlType[UrlType["RelativePath"] = 4] = "RelativePath"; |
| UrlType[UrlType["AbsolutePath"] = 5] = "AbsolutePath"; |
| UrlType[UrlType["SchemeRelative"] = 6] = "SchemeRelative"; |
| UrlType[UrlType["Absolute"] = 7] = "Absolute"; |
| })(UrlType || (UrlType = {})); |
| 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: UrlType.Absolute, |
| }; |
| } |
| function parseUrl(input) { |
| if (isSchemeRelativeUrl(input)) { |
| const url = parseAbsoluteUrl('http:' + input); |
| url.scheme = ''; |
| url.type = UrlType.SchemeRelative; |
| return url; |
| } |
| if (isAbsolutePath(input)) { |
| const url = parseAbsoluteUrl('http://foo.com' + input); |
| url.scheme = ''; |
| url.host = ''; |
| url.type = UrlType.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('?') |
| ? UrlType.Query |
| : input.startsWith('#') |
| ? UrlType.Hash |
| : UrlType.RelativePath |
| : UrlType.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 <= UrlType.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 !== UrlType.Absolute) { |
| const baseUrl = parseUrl(base); |
| const baseType = baseUrl.type; |
| switch (inputType) { |
| case UrlType.Empty: |
| url.hash = baseUrl.hash; |
| // fall through |
| case UrlType.Hash: |
| url.query = baseUrl.query; |
| // fall through |
| case UrlType.Query: |
| case UrlType.RelativePath: |
| mergePaths(url, baseUrl); |
| // fall through |
| case UrlType.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 UrlType.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 UrlType.Hash: |
| case UrlType.Query: |
| return queryHash; |
| case UrlType.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 UrlType.AbsolutePath: |
| return url.path + queryHash; |
| default: |
| return url.scheme + '//' + url.user + url.host + url.port + url.path + queryHash; |
| } |
| } |
| |
| return resolve; |
| |
| })); |
| //# sourceMappingURL=resolve-uri.umd.js.map |