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12 KiB
1 line
12 KiB
2 years ago
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{"version":3,"file":"resolve-uri.mjs","sources":["../src/resolve-uri.ts"],"sourcesContent":["// Matches the scheme of a URL, eg \"http://\"\nconst schemeRegex = /^[\\w+.-]+:\\/\\//;\n\n/**\n * Matches the parts of a URL:\n * 1. Scheme, including \":\", guaranteed.\n * 2. User/password, including \"@\", optional.\n * 3. Host, guaranteed.\n * 4. Port, including \":\", optional.\n * 5. Path, including \"/\", optional.\n */\nconst urlRegex = /^([\\w+.-]+:)\\/\\/([^@/#?]*@)?([^:/#?]*)(:\\d+)?(\\/[^#?]*)?/;\n\n/**\n * File URLs are weird. They dont' need the regular `//` in the scheme, they may or may not start\n * with a leading `/`, they can have a domain (but only if they don't start with a Windows drive).\n *\n * 1. Host, optional.\n * 2. Path, which may inclue \"/\", guaranteed.\n */\nconst fileRegex = /^file:(?:\\/\\/((?![a-z]:)[^/]*)?)?(\\/?.*)/i;\n\ntype Url = {\n scheme: string;\n user: string;\n host: string;\n port: string;\n path: string;\n relativePath: boolean;\n};\n\nfunction isAbsoluteUrl(input: string): boolean {\n return schemeRegex.test(input);\n}\n\nfunction isSchemeRelativeUrl(input: string): boolean {\n return input.startsWith('//');\n}\n\nfunction isAbsolutePath(input: string): boolean {\n return input.startsWith('/');\n}\n\nfunction isFileUrl(input: string): boolean {\n return input.startsWith('file:');\n}\n\nfunction parseAbsoluteUrl(input: string): Url {\n const match = urlRegex.exec(input)!;\n return makeUrl(match[1], match[2] || '', match[3], match[4] || '', match[5] || '/');\n}\n\nfunction parseFileUrl(input: string): Url {\n const match = fileRegex.exec(input)!;\n const path = match[2];\n return makeUrl('file:', '', match[1] || '', '', isAbsolutePath(path) ? path : '/' + path);\n}\n\nfunction makeUrl(scheme: string, user: string, host: string, port: string, path: string): Url {\n return {\n scheme,\n user,\n host,\n port,\n path,\n relativePath: false,\n };\n}\n\nfunction parseUrl(input: string): Url {\n if (isSchemeRelativeUrl(input)) {\n const url = parseAbsoluteUrl('http:' + input);\n url.scheme = '';\n return url;\n }\n\n if (isAbsolutePath(input)) {\n const url = parseAbsoluteUrl('http://foo.com' + input);\n url.scheme = '';\n url.host = '';\n return url;\n }\n\n if (isFileUrl(input)) return parseFileUrl(input);\n\n if (isAbsoluteUrl(input)) return parseAbsoluteUrl(input);\n\n const url = parseAbsoluteUrl('http://foo.com/' + input);\n url.scheme = '';\n url.host = '';\n url.relativePath = true;\n return url;\n}\n\nfunction stripPathFilename(path: string): string {\n // If a path ends with a parent directory \"..\", then it's a relative path with excess parent\n // paths. It's not a file, so we can't strip it.\n if (path.endsWith('/..')) return path;\n const index = path.lastIndexOf('/');\n return path.slice(0, index + 1);\n}\n\nfunction mergePaths(url: Url, base: Url) {\n // If we're not a relative path, then we're an absolute path, and it doesn't matter what base is.\n if (!url.relativePath) return;\n\n normalizePath(base);\n\n // If the path is just a \"/\", then it was an empty path to begin with (remember, we're a relative\n // path).\n if (url.path === '/') {\n url.path = base.path;\n } else {\n // Resolution happens relative to the base path's directory, not the file.\n url.path = stripPathFilename(base.path) + url.path;\n }\n\n // If the base path is absolute, then our path is now absolute too.\n url.relativePath = base.relativePath;\n}\n\n/**\n * The path can have empty directories \"//\", unneeded parents \"foo/..\", or current directory\n * \"foo/.\". We need to normalize to a standard representation.\n */\nfunction normalizePath(url: Url) {\n const { relativePath } = url;\n const pieces = url.path.split('/');\n\n // We need to preserve the first piece always, so that we output a leading slash. The item at\n // pieces[0] is an empty string.\n let pointer = 1;\n\n // Positive is the number of real directories we've output, used for popping a parent directory.\n // Eg, \"foo/bar/..\" wil
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