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732 lines
23 KiB
732 lines
23 KiB
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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'use strict';
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var punycode = require('punycode');
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var util = require('./util');
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exports.parse = urlParse;
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exports.resolve = urlResolve;
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exports.resolveObject = urlResolveObject;
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exports.format = urlFormat;
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exports.Url = Url;
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function Url() {
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this.protocol = null;
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this.slashes = null;
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this.auth = null;
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this.host = null;
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this.port = null;
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this.hostname = null;
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this.hash = null;
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this.search = null;
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this.query = null;
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this.pathname = null;
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this.path = null;
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this.href = null;
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}
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// Reference: RFC 3986, RFC 1808, RFC 2396
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// define these here so at least they only have to be
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// compiled once on the first module load.
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var protocolPattern = /^([a-z0-9.+-]+:)/i,
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portPattern = /:[0-9]*$/,
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// Special case for a simple path URL
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simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/,
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// RFC 2396: characters reserved for delimiting URLs.
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// We actually just auto-escape these.
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delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'],
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// RFC 2396: characters not allowed for various reasons.
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unwise = ['{', '}', '|', '\\', '^', '`'].concat(delims),
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// Allowed by RFCs, but cause of XSS attacks. Always escape these.
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autoEscape = ['\''].concat(unwise),
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// Characters that are never ever allowed in a hostname.
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// Note that any invalid chars are also handled, but these
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// are the ones that are *expected* to be seen, so we fast-path
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// them.
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nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),
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hostEndingChars = ['/', '?', '#'],
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hostnameMaxLen = 255,
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hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,
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hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,
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// protocols that can allow "unsafe" and "unwise" chars.
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unsafeProtocol = {
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'javascript': true,
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'javascript:': true
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},
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// protocols that never have a hostname.
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hostlessProtocol = {
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'javascript': true,
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'javascript:': true
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},
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// protocols that always contain a // bit.
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slashedProtocol = {
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'http': true,
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'https': true,
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'ftp': true,
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'gopher': true,
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'file': true,
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'http:': true,
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'https:': true,
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'ftp:': true,
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'gopher:': true,
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'file:': true
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},
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querystring = require('querystring');
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function urlParse(url, parseQueryString, slashesDenoteHost) {
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if (url && util.isObject(url) && url instanceof Url) return url;
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var u = new Url;
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u.parse(url, parseQueryString, slashesDenoteHost);
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return u;
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}
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Url.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
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if (!util.isString(url)) {
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throw new TypeError("Parameter 'url' must be a string, not " + typeof url);
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}
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// Copy chrome, IE, opera backslash-handling behavior.
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// Back slashes before the query string get converted to forward slashes
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// See: https://code.google.com/p/chromium/issues/detail?id=25916
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var queryIndex = url.indexOf('?'),
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splitter =
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(queryIndex !== -1 && queryIndex < url.indexOf('#')) ? '?' : '#',
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uSplit = url.split(splitter),
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slashRegex = /\\/g;
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uSplit[0] = uSplit[0].replace(slashRegex, '/');
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url = uSplit.join(splitter);
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var rest = url;
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// trim before proceeding.
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// This is to support parse stuff like " http://foo.com \n"
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rest = rest.trim();
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if (!slashesDenoteHost && url.split('#').length === 1) {
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// Try fast path regexp
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var simplePath = simplePathPattern.exec(rest);
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if (simplePath) {
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this.path = rest;
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this.href = rest;
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this.pathname = simplePath[1];
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if (simplePath[2]) {
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this.search = simplePath[2];
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if (parseQueryString) {
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this.query = querystring.parse(this.search.substr(1));
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} else {
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this.query = this.search.substr(1);
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}
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} else if (parseQueryString) {
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this.search = '';
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this.query = {};
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}
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return this;
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}
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}
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var proto = protocolPattern.exec(rest);
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if (proto) {
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proto = proto[0];
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var lowerProto = proto.toLowerCase();
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this.protocol = lowerProto;
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rest = rest.substr(proto.length);
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}
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// figure out if it's got a host
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// user@server is *always* interpreted as a hostname, and url
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// resolution will treat //foo/bar as host=foo,path=bar because that's
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// how the browser resolves relative URLs.
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if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
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var slashes = rest.substr(0, 2) === '//';
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if (slashes && !(proto && hostlessProtocol[proto])) {
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rest = rest.substr(2);
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this.slashes = true;
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}
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}
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if (!hostlessProtocol[proto] &&
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(slashes || (proto && !slashedProtocol[proto]))) {
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// there's a hostname.
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// the first instance of /, ?, ;, or # ends the host.
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//
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// If there is an @ in the hostname, then non-host chars *are* allowed
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// to the left of the last @ sign, unless some host-ending character
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// comes *before* the @-sign.
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// URLs are obnoxious.
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//
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// ex:
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// http://a@b@c/ => user:a@b host:c
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// http://a@b?@c => user:a host:c path:/?@c
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// v0.12 TODO(isaacs): This is not quite how Chrome does things.
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// Review our test case against browsers more comprehensively.
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// find the first instance of any hostEndingChars
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var hostEnd = -1;
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for (var i = 0; i < hostEndingChars.length; i++) {
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var hec = rest.indexOf(hostEndingChars[i]);
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if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
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hostEnd = hec;
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}
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// at this point, either we have an explicit point where the
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// auth portion cannot go past, or the last @ char is the decider.
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var auth, atSign;
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if (hostEnd === -1) {
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// atSign can be anywhere.
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atSign = rest.lastIndexOf('@');
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} else {
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// atSign must be in auth portion.
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// http://a@b/c@d => host:b auth:a path:/c@d
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atSign = rest.lastIndexOf('@', hostEnd);
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}
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// Now we have a portion which is definitely the auth.
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// Pull that off.
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if (atSign !== -1) {
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auth = rest.slice(0, atSign);
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rest = rest.slice(atSign + 1);
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this.auth = decodeURIComponent(auth);
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}
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// the host is the remaining to the left of the first non-host char
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hostEnd = -1;
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for (var i = 0; i < nonHostChars.length; i++) {
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var hec = rest.indexOf(nonHostChars[i]);
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if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
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hostEnd = hec;
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}
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// if we still have not hit it, then the entire thing is a host.
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if (hostEnd === -1)
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hostEnd = rest.length;
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this.host = rest.slice(0, hostEnd);
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rest = rest.slice(hostEnd);
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// pull out port.
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this.parseHost();
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// we've indicated that there is a hostname,
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// so even if it's empty, it has to be present.
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this.hostname = this.hostname || '';
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// if hostname begins with [ and ends with ]
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// assume that it's an IPv6 address.
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var ipv6Hostname = this.hostname[0] === '[' &&
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this.hostname[this.hostname.length - 1] === ']';
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// validate a little.
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if (!ipv6Hostname) {
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var hostparts = this.hostname.split(/\./);
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for (var i = 0, l = hostparts.length; i < l; i++) {
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var part = hostparts[i];
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if (!part) continue;
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if (!part.match(hostnamePartPattern)) {
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var newpart = '';
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for (var j = 0, k = part.length; j < k; j++) {
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if (part.charCodeAt(j) > 127) {
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// we replace non-ASCII char with a temporary placeholder
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// we need this to make sure size of hostname is not
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// broken by replacing non-ASCII by nothing
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newpart += 'x';
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} else {
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newpart += part[j];
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}
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}
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// we test again with ASCII char only
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if (!newpart.match(hostnamePartPattern)) {
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var validParts = hostparts.slice(0, i);
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var notHost = hostparts.slice(i + 1);
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var bit = part.match(hostnamePartStart);
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if (bit) {
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validParts.push(bit[1]);
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notHost.unshift(bit[2]);
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}
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if (notHost.length) {
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rest = '/' + notHost.join('.') + rest;
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}
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this.hostname = validParts.join('.');
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break;
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}
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}
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}
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}
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if (this.hostname.length > hostnameMaxLen) {
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this.hostname = '';
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} else {
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// hostnames are always lower case.
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this.hostname = this.hostname.toLowerCase();
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}
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if (!ipv6Hostname) {
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// IDNA Support: Returns a punycoded representation of "domain".
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// It only converts parts of the domain name that
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// have non-ASCII characters, i.e. it doesn't matter if
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// you call it with a domain that already is ASCII-only.
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this.hostname = punycode.toASCII(this.hostname);
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}
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var p = this.port ? ':' + this.port : '';
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var h = this.hostname || '';
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this.host = h + p;
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this.href += this.host;
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// strip [ and ] from the hostname
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// the host field still retains them, though
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if (ipv6Hostname) {
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this.hostname = this.hostname.substr(1, this.hostname.length - 2);
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if (rest[0] !== '/') {
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rest = '/' + rest;
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}
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}
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}
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// now rest is set to the post-host stuff.
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// chop off any delim chars.
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if (!unsafeProtocol[lowerProto]) {
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// First, make 100% sure that any "autoEscape" chars get
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// escaped, even if encodeURIComponent doesn't think they
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// need to be.
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for (var i = 0, l = autoEscape.length; i < l; i++) {
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var ae = autoEscape[i];
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if (rest.indexOf(ae) === -1)
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continue;
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var esc = encodeURIComponent(ae);
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if (esc === ae) {
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esc = escape(ae);
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}
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rest = rest.split(ae).join(esc);
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}
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}
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// chop off from the tail first.
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var hash = rest.indexOf('#');
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if (hash !== -1) {
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// got a fragment string.
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this.hash = rest.substr(hash);
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rest = rest.slice(0, hash);
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}
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var qm = rest.indexOf('?');
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if (qm !== -1) {
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this.search = rest.substr(qm);
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this.query = rest.substr(qm + 1);
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if (parseQueryString) {
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this.query = querystring.parse(this.query);
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}
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rest = rest.slice(0, qm);
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} else if (parseQueryString) {
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// no query string, but parseQueryString still requested
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this.search = '';
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this.query = {};
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}
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if (rest) this.pathname = rest;
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if (slashedProtocol[lowerProto] &&
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this.hostname && !this.pathname) {
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this.pathname = '/';
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}
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//to support http.request
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if (this.pathname || this.search) {
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var p = this.pathname || '';
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var s = this.search || '';
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this.path = p + s;
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}
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// finally, reconstruct the href based on what has been validated.
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this.href = this.format();
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return this;
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};
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// format a parsed object into a url string
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function urlFormat(obj) {
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// ensure it's an object, and not a string url.
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// If it's an obj, this is a no-op.
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// this way, you can call url_format() on strings
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// to clean up potentially wonky urls.
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if (util.isString(obj)) obj = urlParse(obj);
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if (!(obj instanceof Url)) return Url.prototype.format.call(obj);
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return obj.format();
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}
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Url.prototype.format = function() {
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var auth = this.auth || '';
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if (auth) {
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auth = encodeURIComponent(auth);
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auth = auth.replace(/%3A/i, ':');
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auth += '@';
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}
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var protocol = this.protocol || '',
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pathname = this.pathname || '',
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hash = this.hash || '',
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host = false,
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query = '';
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if (this.host) {
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host = auth + this.host;
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} else if (this.hostname) {
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host = auth + (this.hostname.indexOf(':') === -1 ?
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this.hostname :
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'[' + this.hostname + ']');
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if (this.port) {
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host += ':' + this.port;
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}
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}
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if (this.query &&
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util.isObject(this.query) &&
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Object.keys(this.query).length) {
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query = querystring.stringify(this.query);
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}
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var search = this.search || (query && ('?' + query)) || '';
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if (protocol && protocol.substr(-1) !== ':') protocol += ':';
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// only the slashedProtocols get the //. Not mailto:, xmpp:, etc.
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// unless they had them to begin with.
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if (this.slashes ||
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(!protocol || slashedProtocol[protocol]) && host !== false) {
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host = '//' + (host || '');
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if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;
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} else if (!host) {
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host = '';
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}
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if (hash && hash.charAt(0) !== '#') hash = '#' + hash;
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if (search && search.charAt(0) !== '?') search = '?' + search;
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pathname = pathname.replace(/[?#]/g, function(match) {
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return encodeURIComponent(match);
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});
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search = search.replace('#', '%23');
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return protocol + host + pathname + search + hash;
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};
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function urlResolve(source, relative) {
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return urlParse(source, false, true).resolve(relative);
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}
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Url.prototype.resolve = function(relative) {
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return this.resolveObject(urlParse(relative, false, true)).format();
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};
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function urlResolveObject(source, relative) {
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if (!source) return relative;
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return urlParse(source, false, true).resolveObject(relative);
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}
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Url.prototype.resolveObject = function(relative) {
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if (util.isString(relative)) {
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var rel = new Url();
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rel.parse(relative, false, true);
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relative = rel;
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}
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var result = new Url();
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var tkeys = Object.keys(this);
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for (var tk = 0; tk < tkeys.length; tk++) {
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var tkey = tkeys[tk];
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result[tkey] = this[tkey];
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}
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// hash is always overridden, no matter what.
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// even href="" will remove it.
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result.hash = relative.hash;
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// if the relative url is empty, then there's nothing left to do here.
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if (relative.href === '') {
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result.href = result.format();
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return result;
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}
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// hrefs like //foo/bar always cut to the protocol.
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if (relative.slashes && !relative.protocol) {
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// take everything except the protocol from relative
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var rkeys = Object.keys(relative);
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for (var rk = 0; rk < rkeys.length; rk++) {
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var rkey = rkeys[rk];
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if (rkey !== 'protocol')
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result[rkey] = relative[rkey];
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}
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//urlParse appends trailing / to urls like http://www.example.com
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if (slashedProtocol[result.protocol] &&
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result.hostname && !result.pathname) {
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result.path = result.pathname = '/';
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}
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result.href = result.format();
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return result;
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}
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if (relative.protocol && relative.protocol !== result.protocol) {
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// if it's a known url protocol, then changing
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// the protocol does weird things
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// first, if it's not file:, then we MUST have a host,
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// and if there was a path
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// to begin with, then we MUST have a path.
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// if it is file:, then the host is dropped,
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// because that's known to be hostless.
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// anything else is assumed to be absolute.
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if (!slashedProtocol[relative.protocol]) {
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var keys = Object.keys(relative);
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for (var v = 0; v < keys.length; v++) {
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var k = keys[v];
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result[k] = relative[k];
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}
|
|
result.href = result.format();
|
|
return result;
|
|
}
|
|
|
|
result.protocol = relative.protocol;
|
|
if (!relative.host && !hostlessProtocol[relative.protocol]) {
|
|
var relPath = (relative.pathname || '').split('/');
|
|
while (relPath.length && !(relative.host = relPath.shift()));
|
|
if (!relative.host) relative.host = '';
|
|
if (!relative.hostname) relative.hostname = '';
|
|
if (relPath[0] !== '') relPath.unshift('');
|
|
if (relPath.length < 2) relPath.unshift('');
|
|
result.pathname = relPath.join('/');
|
|
} else {
|
|
result.pathname = relative.pathname;
|
|
}
|
|
result.search = relative.search;
|
|
result.query = relative.query;
|
|
result.host = relative.host || '';
|
|
result.auth = relative.auth;
|
|
result.hostname = relative.hostname || relative.host;
|
|
result.port = relative.port;
|
|
// to support http.request
|
|
if (result.pathname || result.search) {
|
|
var p = result.pathname || '';
|
|
var s = result.search || '';
|
|
result.path = p + s;
|
|
}
|
|
result.slashes = result.slashes || relative.slashes;
|
|
result.href = result.format();
|
|
return result;
|
|
}
|
|
|
|
var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),
|
|
isRelAbs = (
|
|
relative.host ||
|
|
relative.pathname && relative.pathname.charAt(0) === '/'
|
|
),
|
|
mustEndAbs = (isRelAbs || isSourceAbs ||
|
|
(result.host && relative.pathname)),
|
|
removeAllDots = mustEndAbs,
|
|
srcPath = result.pathname && result.pathname.split('/') || [],
|
|
relPath = relative.pathname && relative.pathname.split('/') || [],
|
|
psychotic = result.protocol && !slashedProtocol[result.protocol];
|
|
|
|
// if the url is a non-slashed url, then relative
|
|
// links like ../.. should be able
|
|
// to crawl up to the hostname, as well. This is strange.
|
|
// result.protocol has already been set by now.
|
|
// Later on, put the first path part into the host field.
|
|
if (psychotic) {
|
|
result.hostname = '';
|
|
result.port = null;
|
|
if (result.host) {
|
|
if (srcPath[0] === '') srcPath[0] = result.host;
|
|
else srcPath.unshift(result.host);
|
|
}
|
|
result.host = '';
|
|
if (relative.protocol) {
|
|
relative.hostname = null;
|
|
relative.port = null;
|
|
if (relative.host) {
|
|
if (relPath[0] === '') relPath[0] = relative.host;
|
|
else relPath.unshift(relative.host);
|
|
}
|
|
relative.host = null;
|
|
}
|
|
mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');
|
|
}
|
|
|
|
if (isRelAbs) {
|
|
// it's absolute.
|
|
result.host = (relative.host || relative.host === '') ?
|
|
relative.host : result.host;
|
|
result.hostname = (relative.hostname || relative.hostname === '') ?
|
|
relative.hostname : result.hostname;
|
|
result.search = relative.search;
|
|
result.query = relative.query;
|
|
srcPath = relPath;
|
|
// fall through to the dot-handling below.
|
|
} else if (relPath.length) {
|
|
// it's relative
|
|
// throw away the existing file, and take the new path instead.
|
|
if (!srcPath) srcPath = [];
|
|
srcPath.pop();
|
|
srcPath = srcPath.concat(relPath);
|
|
result.search = relative.search;
|
|
result.query = relative.query;
|
|
} else if (!util.isNullOrUndefined(relative.search)) {
|
|
// just pull out the search.
|
|
// like href='?foo'.
|
|
// Put this after the other two cases because it simplifies the booleans
|
|
if (psychotic) {
|
|
result.hostname = result.host = srcPath.shift();
|
|
//occationaly the auth can get stuck only in host
|
|
//this especially happens in cases like
|
|
//url.resolveObject('mailto:local1@domain1', 'local2@domain2')
|
|
var authInHost = result.host && result.host.indexOf('@') > 0 ?
|
|
result.host.split('@') : false;
|
|
if (authInHost) {
|
|
result.auth = authInHost.shift();
|
|
result.host = result.hostname = authInHost.shift();
|
|
}
|
|
}
|
|
result.search = relative.search;
|
|
result.query = relative.query;
|
|
//to support http.request
|
|
if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
|
|
result.path = (result.pathname ? result.pathname : '') +
|
|
(result.search ? result.search : '');
|
|
}
|
|
result.href = result.format();
|
|
return result;
|
|
}
|
|
|
|
if (!srcPath.length) {
|
|
// no path at all. easy.
|
|
// we've already handled the other stuff above.
|
|
result.pathname = null;
|
|
//to support http.request
|
|
if (result.search) {
|
|
result.path = '/' + result.search;
|
|
} else {
|
|
result.path = null;
|
|
}
|
|
result.href = result.format();
|
|
return result;
|
|
}
|
|
|
|
// if a url ENDs in . or .., then it must get a trailing slash.
|
|
// however, if it ends in anything else non-slashy,
|
|
// then it must NOT get a trailing slash.
|
|
var last = srcPath.slice(-1)[0];
|
|
var hasTrailingSlash = (
|
|
(result.host || relative.host || srcPath.length > 1) &&
|
|
(last === '.' || last === '..') || last === '');
|
|
|
|
// strip single dots, resolve double dots to parent dir
|
|
// if the path tries to go above the root, `up` ends up > 0
|
|
var up = 0;
|
|
for (var i = srcPath.length; i >= 0; i--) {
|
|
last = srcPath[i];
|
|
if (last === '.') {
|
|
srcPath.splice(i, 1);
|
|
} else if (last === '..') {
|
|
srcPath.splice(i, 1);
|
|
up++;
|
|
} else if (up) {
|
|
srcPath.splice(i, 1);
|
|
up--;
|
|
}
|
|
}
|
|
|
|
// if the path is allowed to go above the root, restore leading ..s
|
|
if (!mustEndAbs && !removeAllDots) {
|
|
for (; up--; up) {
|
|
srcPath.unshift('..');
|
|
}
|
|
}
|
|
|
|
if (mustEndAbs && srcPath[0] !== '' &&
|
|
(!srcPath[0] || srcPath[0].charAt(0) !== '/')) {
|
|
srcPath.unshift('');
|
|
}
|
|
|
|
if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {
|
|
srcPath.push('');
|
|
}
|
|
|
|
var isAbsolute = srcPath[0] === '' ||
|
|
(srcPath[0] && srcPath[0].charAt(0) === '/');
|
|
|
|
// put the host back
|
|
if (psychotic) {
|
|
result.hostname = result.host = isAbsolute ? '' :
|
|
srcPath.length ? srcPath.shift() : '';
|
|
//occationaly the auth can get stuck only in host
|
|
//this especially happens in cases like
|
|
//url.resolveObject('mailto:local1@domain1', 'local2@domain2')
|
|
var authInHost = result.host && result.host.indexOf('@') > 0 ?
|
|
result.host.split('@') : false;
|
|
if (authInHost) {
|
|
result.auth = authInHost.shift();
|
|
result.host = result.hostname = authInHost.shift();
|
|
}
|
|
}
|
|
|
|
mustEndAbs = mustEndAbs || (result.host && srcPath.length);
|
|
|
|
if (mustEndAbs && !isAbsolute) {
|
|
srcPath.unshift('');
|
|
}
|
|
|
|
if (!srcPath.length) {
|
|
result.pathname = null;
|
|
result.path = null;
|
|
} else {
|
|
result.pathname = srcPath.join('/');
|
|
}
|
|
|
|
//to support request.http
|
|
if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
|
|
result.path = (result.pathname ? result.pathname : '') +
|
|
(result.search ? result.search : '');
|
|
}
|
|
result.auth = relative.auth || result.auth;
|
|
result.slashes = result.slashes || relative.slashes;
|
|
result.href = result.format();
|
|
return result;
|
|
};
|
|
|
|
Url.prototype.parseHost = function() {
|
|
var host = this.host;
|
|
var port = portPattern.exec(host);
|
|
if (port) {
|
|
port = port[0];
|
|
if (port !== ':') {
|
|
this.port = port.substr(1);
|
|
}
|
|
host = host.substr(0, host.length - port.length);
|
|
}
|
|
if (host) this.hostname = host;
|
|
};
|