mirror of
https://github.com/denoland/deno.git
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528 lines
14 KiB
TypeScript
528 lines
14 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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import { build } from "../build.ts";
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import { getRandomValues } from "../ops/get_random_values.ts";
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import { customInspect } from "./console.ts";
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import { urls } from "./url_search_params.ts";
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interface URLParts {
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protocol: string;
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username: string;
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password: string;
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hostname: string;
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port: string;
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path: string;
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query: string;
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hash: string;
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}
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const searchParamsMethods: Array<keyof URLSearchParams> = [
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"append",
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"delete",
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"set",
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];
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const specialSchemes = ["ftp", "file", "http", "https", "ws", "wss"];
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// https://url.spec.whatwg.org/#special-scheme
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const schemePorts: { [key: string]: string } = {
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ftp: "21",
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file: "",
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http: "80",
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https: "443",
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ws: "80",
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wss: "443",
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};
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const MAX_PORT = 2 ** 16 - 1;
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// Remove the part of the string that matches the pattern and return the
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// remainder (RHS) as well as the first captured group of the matched substring
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// (LHS). e.g.
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// takePattern("https://deno.land:80", /^([a-z]+):[/]{2}/)
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// = ["http", "deno.land:80"]
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// takePattern("deno.land:80", /^(\[[0-9a-fA-F.:]{2,}\]|[^:]+)/)
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// = ["deno.land", "80"]
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function takePattern(string: string, pattern: RegExp): [string, string] {
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let capture = "";
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const rest = string.replace(pattern, (_, capture_) => {
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capture = capture_;
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return "";
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});
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return [capture, rest];
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}
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function parse(url: string, isBase = true): URLParts | undefined {
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const parts: Partial<URLParts> = {};
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let restUrl;
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[parts.protocol, restUrl] = takePattern(url.trim(), /^([a-z]+):/);
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if (isBase && parts.protocol == "") {
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return undefined;
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}
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if (parts.protocol == "file") {
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parts.username = "";
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parts.password = "";
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[parts.hostname, restUrl] = takePattern(restUrl, /^[/\\]{2}([^/\\?#]*)/);
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parts.port = "";
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} else if (specialSchemes.includes(parts.protocol)) {
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let restAuthority;
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[restAuthority, restUrl] = takePattern(
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restUrl,
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/^[/\\]{2}[/\\]*([^/\\?#]+)/
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);
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if (isBase && restAuthority == "") {
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return undefined;
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}
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let restAuthentication;
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[restAuthentication, restAuthority] = takePattern(restAuthority, /^(.*)@/);
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[parts.username, restAuthentication] = takePattern(
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restAuthentication,
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/^([^:]*)/
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);
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parts.username = encodeUserinfo(parts.username);
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[parts.password] = takePattern(restAuthentication, /^:(.*)/);
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parts.password = encodeUserinfo(parts.password);
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[parts.hostname, restAuthority] = takePattern(
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restAuthority,
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/^(\[[0-9a-fA-F.:]{2,}\]|[^:]+)/
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);
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[parts.port] = takePattern(restAuthority, /^:(.*)/);
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if (!isValidPort(parts.port)) {
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return undefined;
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}
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} else {
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parts.username = "";
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parts.password = "";
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parts.hostname = "";
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parts.port = "";
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}
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try {
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const IPv6re = /^\[[0-9a-fA-F.:]{2,}\]$/;
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if (!IPv6re.test(parts.hostname)) {
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parts.hostname = encodeHostname(parts.hostname); // Non-IPv6 URLs
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}
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parts.hostname = parts.hostname.toLowerCase();
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} catch {
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return undefined;
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}
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[parts.path, restUrl] = takePattern(restUrl, /^([^?#]*)/);
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parts.path = encodePathname(parts.path.replace(/\\/g, "/"));
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[parts.query, restUrl] = takePattern(restUrl, /^(\?[^#]*)/);
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parts.query = encodeSearch(parts.query);
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[parts.hash] = takePattern(restUrl, /^(#.*)/);
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parts.hash = encodeHash(parts.hash);
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return parts as URLParts;
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}
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// Based on https://github.com/kelektiv/node-uuid
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// TODO(kevinkassimo): Use deno_std version once possible.
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function generateUUID(): string {
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return "00000000-0000-4000-8000-000000000000".replace(/[0]/g, (): string =>
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// random integer from 0 to 15 as a hex digit.
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(getRandomValues(new Uint8Array(1))[0] % 16).toString(16)
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);
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}
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// Keep it outside of URL to avoid any attempts of access.
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export const blobURLMap = new Map<string, Blob>();
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function isAbsolutePath(path: string): boolean {
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return path.startsWith("/");
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}
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// Resolves `.`s and `..`s where possible.
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// Preserves repeating and trailing `/`s by design.
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// On Windows, drive letter paths will be given a leading slash, and also a
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// trailing slash if there are no other components e.g. "C:" -> "/C:/".
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function normalizePath(path: string, isFilePath = false): string {
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if (build.os == "windows" && isFilePath) {
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path = path.replace(/^\/*([A-Za-z]:)(\/|$)/, "/$1/");
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}
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const isAbsolute = isAbsolutePath(path);
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path = path.replace(/^\//, "");
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const pathSegments = path.split("/");
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const newPathSegments: string[] = [];
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for (let i = 0; i < pathSegments.length; i++) {
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const previous = newPathSegments[newPathSegments.length - 1];
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if (
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pathSegments[i] == ".." &&
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previous != ".." &&
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(previous != undefined || isAbsolute)
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) {
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newPathSegments.pop();
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} else if (pathSegments[i] != ".") {
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newPathSegments.push(pathSegments[i]);
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}
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}
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let newPath = newPathSegments.join("/");
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if (!isAbsolute) {
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if (newPathSegments.length == 0) {
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newPath = ".";
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}
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} else {
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newPath = `/${newPath}`;
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}
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return newPath;
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}
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// Standard URL basing logic, applied to paths.
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function resolvePathFromBase(
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path: string,
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basePath: string,
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isFilePath = false
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): string {
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let normalizedPath = normalizePath(path, isFilePath);
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let normalizedBasePath = normalizePath(basePath, isFilePath);
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let driveLetterPrefix = "";
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if (build.os == "windows" && isFilePath) {
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let driveLetter = "";
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let baseDriveLetter = "";
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[driveLetter, normalizedPath] = takePattern(
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normalizedPath,
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/^(\/[A-Za-z]:)(?=\/)/
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);
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[baseDriveLetter, normalizedBasePath] = takePattern(
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normalizedBasePath,
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/^(\/[A-Za-z]:)(?=\/)/
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);
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driveLetterPrefix = driveLetter || baseDriveLetter;
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}
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if (isAbsolutePath(normalizedPath)) {
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return `${driveLetterPrefix}${normalizedPath}`;
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}
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if (!isAbsolutePath(normalizedBasePath)) {
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throw new TypeError("Base path must be absolute.");
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}
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// Special case.
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if (path == "") {
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return `${driveLetterPrefix}${normalizedBasePath}`;
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}
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// Remove everything after the last `/` in `normalizedBasePath`.
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const prefix = normalizedBasePath.replace(/[^\/]*$/, "");
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// If `normalizedPath` ends with `.` or `..`, add a trailing slash.
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const suffix = normalizedPath.replace(/(?<=(^|\/)(\.|\.\.))$/, "/");
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return `${driveLetterPrefix}${normalizePath(prefix + suffix)}`;
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}
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function isValidPort(value: string): boolean {
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// https://url.spec.whatwg.org/#port-state
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if (value === "") true;
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const port = Number(value);
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return Number.isInteger(port) && port >= 0 && port <= MAX_PORT;
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}
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/** @internal */
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export const parts = new WeakMap<URL, URLParts>();
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export class URLImpl implements URL {
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#searchParams!: URLSearchParams;
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[customInspect](): string {
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const keys = [
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"href",
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"origin",
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"protocol",
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"username",
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"password",
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"host",
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"hostname",
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"port",
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"pathname",
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"hash",
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"search",
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];
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const objectString = keys
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.map((key: string) => `${key}: "${this[key as keyof this] || ""}"`)
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.join(", ");
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return `URL { ${objectString} }`;
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}
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#updateSearchParams = (): void => {
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const searchParams = new URLSearchParams(this.search);
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for (const methodName of searchParamsMethods) {
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/* eslint-disable @typescript-eslint/no-explicit-any */
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const method: (...args: any[]) => any = searchParams[methodName];
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searchParams[methodName] = (...args: unknown[]): any => {
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method.apply(searchParams, args);
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this.search = searchParams.toString();
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};
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/* eslint-enable */
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}
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this.#searchParams = searchParams;
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urls.set(searchParams, this);
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};
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get hash(): string {
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return parts.get(this)!.hash;
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}
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set hash(value: string) {
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value = unescape(String(value));
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if (!value) {
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parts.get(this)!.hash = "";
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} else {
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if (value.charAt(0) !== "#") {
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value = `#${value}`;
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}
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// hashes can contain % and # unescaped
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parts.get(this)!.hash = encodeHash(value);
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}
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}
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get host(): string {
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return `${this.hostname}${this.port ? `:${this.port}` : ""}`;
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}
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set host(value: string) {
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value = String(value);
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const url = new URL(`http://${value}`);
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parts.get(this)!.hostname = url.hostname;
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parts.get(this)!.port = url.port;
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}
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get hostname(): string {
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return parts.get(this)!.hostname;
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}
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set hostname(value: string) {
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value = String(value);
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try {
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parts.get(this)!.hostname = encodeHostname(value);
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} catch {}
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}
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get href(): string {
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const authentication =
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this.username || this.password
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? `${this.username}${this.password ? ":" + this.password : ""}@`
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: "";
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let slash = "";
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if (this.host || this.protocol === "file:") {
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slash = "//";
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}
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return `${this.protocol}${slash}${authentication}${this.host}${this.pathname}${this.search}${this.hash}`;
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}
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set href(value: string) {
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value = String(value);
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if (value !== this.href) {
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const url = new URL(value);
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parts.set(this, { ...parts.get(url)! });
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this.#updateSearchParams();
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}
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}
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get origin(): string {
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if (this.host) {
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return `${this.protocol}//${this.host}`;
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}
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return "null";
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}
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get password(): string {
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return parts.get(this)!.password;
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}
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set password(value: string) {
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value = String(value);
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parts.get(this)!.password = encodeUserinfo(value);
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}
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get pathname(): string {
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return parts.get(this)?.path || "/";
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}
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set pathname(value: string) {
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value = unescape(String(value));
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if (!value || value.charAt(0) !== "/") {
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value = `/${value}`;
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}
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// paths can contain % unescaped
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parts.get(this)!.path = encodePathname(value);
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}
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get port(): string {
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const port = parts.get(this)!.port;
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if (schemePorts[parts.get(this)!.protocol] === port) {
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return "";
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}
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return port;
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}
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set port(value: string) {
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if (!isValidPort(value)) {
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return;
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}
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parts.get(this)!.port = value.toString();
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}
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get protocol(): string {
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return `${parts.get(this)!.protocol}:`;
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}
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set protocol(value: string) {
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value = String(value);
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if (value) {
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if (value.charAt(value.length - 1) === ":") {
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value = value.slice(0, -1);
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}
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parts.get(this)!.protocol = encodeURIComponent(value);
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}
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}
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get search(): string {
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return parts.get(this)!.query;
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}
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set search(value: string) {
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value = String(value);
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const query = value == "" || value.charAt(0) == "?" ? value : `?${value}`;
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parts.get(this)!.query = encodeSearch(query);
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this.#updateSearchParams();
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}
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get username(): string {
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return parts.get(this)!.username;
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}
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set username(value: string) {
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value = String(value);
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parts.get(this)!.username = encodeUserinfo(value);
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}
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get searchParams(): URLSearchParams {
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return this.#searchParams;
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}
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constructor(url: string | URL, base?: string | URL) {
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let baseParts: URLParts | undefined;
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if (base) {
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baseParts = typeof base === "string" ? parse(base) : parts.get(base);
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if (baseParts == undefined) {
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throw new TypeError("Invalid base URL.");
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}
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}
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const urlParts =
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typeof url === "string" ? parse(url, !baseParts) : parts.get(url);
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if (urlParts == undefined) {
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throw new TypeError("Invalid URL.");
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}
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if (urlParts.protocol) {
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urlParts.path = normalizePath(urlParts.path, urlParts.protocol == "file");
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parts.set(this, urlParts);
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} else if (baseParts) {
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parts.set(this, {
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protocol: baseParts.protocol,
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username: baseParts.username,
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password: baseParts.password,
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hostname: baseParts.hostname,
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port: baseParts.port,
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path: resolvePathFromBase(
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urlParts.path,
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baseParts.path || "/",
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baseParts.protocol == "file"
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),
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query: urlParts.query,
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hash: urlParts.hash,
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});
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} else {
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throw new TypeError("Invalid URL.");
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}
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this.#updateSearchParams();
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}
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toString(): string {
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return this.href;
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}
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toJSON(): string {
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return this.href;
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}
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// TODO(kevinkassimo): implement MediaSource version in the future.
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static createObjectURL(b: Blob): string {
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const origin = "http://deno-opaque-origin";
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const key = `blob:${origin}/${generateUUID()}`;
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blobURLMap.set(key, b);
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return key;
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}
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static revokeObjectURL(url: string): void {
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let urlObject;
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try {
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urlObject = new URL(url);
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} catch {
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throw new TypeError("Provided URL string is not valid");
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}
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if (urlObject.protocol !== "blob:") {
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return;
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}
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// Origin match check seems irrelevant for now, unless we implement
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// persisten storage for per globalThis.location.origin at some point.
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blobURLMap.delete(url);
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}
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}
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function charInC0ControlSet(c: string): boolean {
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return c >= "\u0000" && c <= "\u001F";
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}
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function charInSearchSet(c: string): boolean {
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// prettier-ignore
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return charInC0ControlSet(c) || ["\u0020", "\u0022", "\u0023", "\u0027", "\u003C", "\u003E"].includes(c) || c > "\u007E";
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}
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function charInFragmentSet(c: string): boolean {
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// prettier-ignore
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return charInC0ControlSet(c) || ["\u0020", "\u0022", "\u003C", "\u003E", "\u0060"].includes(c);
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}
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function charInPathSet(c: string): boolean {
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// prettier-ignore
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return charInFragmentSet(c) || ["\u0023", "\u003F", "\u007B", "\u007D"].includes(c);
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}
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function charInUserinfoSet(c: string): boolean {
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// "\u0027" ("'") seemingly isn't in the spec, but matches Chrome and Firefox.
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// prettier-ignore
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return charInPathSet(c) || ["\u0027", "\u002F", "\u003A", "\u003B", "\u003D", "\u0040", "\u005B", "\u005C", "\u005D", "\u005E", "\u007C"].includes(c);
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}
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function encodeChar(c: string): string {
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return `%${c.charCodeAt(0).toString(16)}`.toUpperCase();
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}
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function encodeUserinfo(s: string): string {
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return [...s].map((c) => (charInUserinfoSet(c) ? encodeChar(c) : c)).join("");
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}
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function encodeHostname(s: string): string {
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// FIXME: https://url.spec.whatwg.org/#idna
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if (s.includes(":")) {
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throw new TypeError("Invalid hostname.");
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}
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return encodeURIComponent(s);
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}
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function encodePathname(s: string): string {
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return [...s].map((c) => (charInPathSet(c) ? encodeChar(c) : c)).join("");
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}
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function encodeSearch(s: string): string {
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return [...s].map((c) => (charInSearchSet(c) ? encodeChar(c) : c)).join("");
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}
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function encodeHash(s: string): string {
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return [...s].map((c) => (charInFragmentSet(c) ? encodeChar(c) : c)).join("");
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}
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