626 lines
20 KiB
JavaScript
626 lines
20 KiB
JavaScript
// 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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var punycode = require('punycode');
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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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// 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]*$/,
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// RFC 2396: characters reserved for delimiting URLs.
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// We actually just auto-escape these.
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delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'],
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// RFC 2396: characters not allowed for various reasons.
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unwise = ['{', '}', '|', '\\', '^', '~', '`'].concat(delims),
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// Allowed by RFCs, but cause of XSS attacks. Always escape these.
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autoEscape = ['\''].concat(delims),
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// Characters that are never ever allowed in a hostname.
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// Note that any invalid chars are also handled, but these
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// are the ones that are *expected* to be seen, so we fast-path
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// them.
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nonHostChars = ['%', '/', '?', ';', '#']
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.concat(unwise).concat(autoEscape),
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nonAuthChars = ['/', '@', '?', '#'].concat(delims),
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hostnameMaxLen = 255,
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hostnamePartPattern = /^[a-zA-Z0-9][a-z0-9A-Z_-]{0,62}$/,
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hostnamePartStart = /^([a-zA-Z0-9][a-z0-9A-Z_-]{0,62})(.*)$/,
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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 have a path component.
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pathedProtocol = {
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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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'ftp:': true,
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'gopher:': true,
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'file:': 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 && typeof(url) === 'object' && url.href) return url;
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if (typeof url !== 'string') {
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throw new TypeError("Parameter 'url' must be a string, not " + typeof url);
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}
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var out = {},
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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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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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out.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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out.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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// don't enforce full RFC correctness, just be unstupid about it.
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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 first @ sign, unless some non-auth character
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// comes *before* the @-sign.
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// URLs are obnoxious.
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var atSign = rest.indexOf('@');
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if (atSign !== -1) {
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var auth = rest.slice(0, atSign);
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// there *may be* an auth
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var hasAuth = true;
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for (var i = 0, l = nonAuthChars.length; i < l; i++) {
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if (auth.indexOf(nonAuthChars[i]) !== -1) {
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// not a valid auth. Something like http://foo.com/bar@baz/
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hasAuth = false;
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break;
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}
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}
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if (hasAuth) {
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// pluck off the auth portion.
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out.auth = decodeURIComponent(auth);
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rest = rest.substr(atSign + 1);
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}
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}
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var firstNonHost = -1;
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for (var i = 0, l = nonHostChars.length; i < l; i++) {
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var index = rest.indexOf(nonHostChars[i]);
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if (index !== -1 &&
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(firstNonHost < 0 || index < firstNonHost)) firstNonHost = index;
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}
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if (firstNonHost !== -1) {
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out.host = rest.substr(0, firstNonHost);
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rest = rest.substr(firstNonHost);
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} else {
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out.host = rest;
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rest = '';
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}
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// pull out port.
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var p = parseHost(out.host);
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var keys = Object.keys(p);
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for (var i = 0, l = keys.length; i < l; i++) {
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var key = keys[i];
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out[key] = p[key];
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}
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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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out.hostname = out.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 = out.hostname[0] === '[' &&
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out.hostname[out.hostname.length - 1] === ']';
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// validate a little.
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if (out.hostname.length > hostnameMaxLen) {
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out.hostname = '';
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} else if (!ipv6Hostname) {
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var hostparts = out.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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out.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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// hostnames are always lower case.
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out.hostname = out.hostname.toLowerCase();
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if (!ipv6Hostname) {
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// IDNA Support: Returns a puny coded representation of "domain".
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// It only converts the part of the domain name that
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// has non ASCII characters. I.e. it dosent matter if
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// you call it with a domain that already is in ASCII.
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var domainArray = out.hostname.split('.');
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var newOut = [];
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for (var i = 0; i < domainArray.length; ++i) {
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var s = domainArray[i];
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newOut.push(s.match(/[^A-Za-z0-9_-]/) ?
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'xn--' + punycode.encode(s) : s);
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}
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out.hostname = newOut.join('.');
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}
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out.host = (out.hostname || '') +
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((out.port) ? ':' + out.port : '');
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out.href += out.host;
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// strip [ and ] from the hostname
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if (ipv6Hostname) {
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out.hostname = out.hostname.substr(1, out.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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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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out.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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out.search = rest.substr(qm);
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out.query = rest.substr(qm + 1);
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if (parseQueryString) {
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out.query = querystring.parse(out.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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out.search = '';
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out.query = {};
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}
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if (rest) out.pathname = rest;
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if (slashedProtocol[proto] &&
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out.hostname && !out.pathname) {
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out.pathname = '/';
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}
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//to support http.request
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if (out.pathname || out.search) {
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out.path = (out.pathname ? out.pathname : '') +
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(out.search ? out.search : '');
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}
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// finally, reconstruct the href based on what has been validated.
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out.href = urlFormat(out);
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return out;
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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 (typeof(obj) === 'string') obj = urlParse(obj);
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var auth = obj.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 = obj.protocol || '',
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pathname = obj.pathname || '',
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hash = obj.hash || '',
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host = false,
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query = '';
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if (obj.host !== undefined) {
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host = auth + obj.host;
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} else if (obj.hostname !== undefined) {
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host = auth + (obj.hostname.indexOf(':') === -1 ?
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obj.hostname :
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'[' + obj.hostname + ']');
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if (obj.port) {
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host += ':' + obj.port;
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}
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}
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if (obj.query && typeof obj.query === 'object' &&
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Object.keys(obj.query).length) {
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query = querystring.stringify(obj.query);
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}
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var search = obj.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 (obj.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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return protocol + host + pathname + search + hash;
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}
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function urlResolve(source, relative) {
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return urlFormat(urlResolveObject(source, relative));
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}
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function urlResolveObject(source, relative) {
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if (!source) return relative;
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source = urlParse(urlFormat(source), false, true);
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relative = urlParse(urlFormat(relative), false, true);
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// hash is always overridden, no matter what.
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source.hash = relative.hash;
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if (relative.href === '') {
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source.href = urlFormat(source);
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return source;
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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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relative.protocol = source.protocol;
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//urlParse appends trailing / to urls like http://www.example.com
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if (slashedProtocol[relative.protocol] &&
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relative.hostname && !relative.pathname) {
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relative.path = relative.pathname = '/';
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}
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relative.href = urlFormat(relative);
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return relative;
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}
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if (relative.protocol && relative.protocol !== source.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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relative.href = urlFormat(relative);
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return relative;
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}
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source.protocol = relative.protocol;
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if (!relative.host && !hostlessProtocol[relative.protocol]) {
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var relPath = (relative.pathname || '').split('/');
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while (relPath.length && !(relative.host = relPath.shift()));
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if (!relative.host) relative.host = '';
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if (!relative.hostname) relative.hostname = '';
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if (relPath[0] !== '') relPath.unshift('');
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if (relPath.length < 2) relPath.unshift('');
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relative.pathname = relPath.join('/');
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}
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source.pathname = relative.pathname;
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source.search = relative.search;
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source.query = relative.query;
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source.host = relative.host || '';
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source.auth = relative.auth;
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source.hostname = relative.hostname || relative.host;
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source.port = relative.port;
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//to support http.request
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if (source.pathname !== undefined || source.search !== undefined) {
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source.path = (source.pathname ? source.pathname : '') +
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(source.search ? source.search : '');
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}
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source.slashes = source.slashes || relative.slashes;
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source.href = urlFormat(source);
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return source;
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}
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var isSourceAbs = (source.pathname && source.pathname.charAt(0) === '/'),
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isRelAbs = (
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relative.host !== undefined ||
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relative.pathname && relative.pathname.charAt(0) === '/'
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),
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mustEndAbs = (isRelAbs || isSourceAbs ||
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(source.host && relative.pathname)),
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removeAllDots = mustEndAbs,
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srcPath = source.pathname && source.pathname.split('/') || [],
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relPath = relative.pathname && relative.pathname.split('/') || [],
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psychotic = source.protocol &&
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!slashedProtocol[source.protocol];
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// if the url is a non-slashed url, then relative
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// links like ../.. should be able
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// to crawl up to the hostname, as well. This is strange.
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// source.protocol has already been set by now.
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// Later on, put the first path part into the host field.
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if (psychotic) {
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delete source.hostname;
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delete source.port;
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if (source.host) {
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if (srcPath[0] === '') srcPath[0] = source.host;
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else srcPath.unshift(source.host);
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}
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delete source.host;
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if (relative.protocol) {
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delete relative.hostname;
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delete relative.port;
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if (relative.host) {
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if (relPath[0] === '') relPath[0] = relative.host;
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else relPath.unshift(relative.host);
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}
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delete relative.host;
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}
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mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');
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}
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if (isRelAbs) {
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// it's absolute.
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source.host = (relative.host || relative.host === '') ?
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relative.host : source.host;
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source.hostname = (relative.hostname || relative.hostname === '') ?
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relative.hostname : source.hostname;
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source.search = relative.search;
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source.query = relative.query;
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srcPath = relPath;
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// fall through to the dot-handling below.
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} else if (relPath.length) {
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// it's relative
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// throw away the existing file, and take the new path instead.
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if (!srcPath) srcPath = [];
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srcPath.pop();
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srcPath = srcPath.concat(relPath);
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source.search = relative.search;
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source.query = relative.query;
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} else if ('search' in relative) {
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// just pull out the search.
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// like href='?foo'.
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// Put this after the other two cases because it simplifies the booleans
|
|
if (psychotic) {
|
|
source.hostname = source.host = srcPath.shift();
|
|
//occationaly the auth can get stuck only in host
|
|
//this especialy happens in cases like
|
|
//url.resolveObject('mailto:local1@domain1', 'local2@domain2')
|
|
var authInHost = source.host && source.host.indexOf('@') > 0 ?
|
|
source.host.split('@') : false;
|
|
if (authInHost) {
|
|
source.auth = authInHost.shift();
|
|
source.host = source.hostname = authInHost.shift();
|
|
}
|
|
}
|
|
source.search = relative.search;
|
|
source.query = relative.query;
|
|
//to support http.request
|
|
if (source.pathname !== undefined || source.search !== undefined) {
|
|
source.path = (source.pathname ? source.pathname : '') +
|
|
(source.search ? source.search : '');
|
|
}
|
|
source.href = urlFormat(source);
|
|
return source;
|
|
}
|
|
if (!srcPath.length) {
|
|
// no path at all. easy.
|
|
// we've already handled the other stuff above.
|
|
delete source.pathname;
|
|
//to support http.request
|
|
if (!source.search) {
|
|
source.path = '/' + source.search;
|
|
} else {
|
|
delete source.path;
|
|
}
|
|
source.href = urlFormat(source);
|
|
return source;
|
|
}
|
|
// 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 = (
|
|
(source.host || relative.host) && (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) {
|
|
source.hostname = source.host = isAbsolute ? '' :
|
|
srcPath.length ? srcPath.shift() : '';
|
|
//occationaly the auth can get stuck only in host
|
|
//this especialy happens in cases like
|
|
//url.resolveObject('mailto:local1@domain1', 'local2@domain2')
|
|
var authInHost = source.host && source.host.indexOf('@') > 0 ?
|
|
source.host.split('@') : false;
|
|
if (authInHost) {
|
|
source.auth = authInHost.shift();
|
|
source.host = source.hostname = authInHost.shift();
|
|
}
|
|
}
|
|
|
|
mustEndAbs = mustEndAbs || (source.host && srcPath.length);
|
|
|
|
if (mustEndAbs && !isAbsolute) {
|
|
srcPath.unshift('');
|
|
}
|
|
|
|
source.pathname = srcPath.join('/');
|
|
//to support request.http
|
|
if (source.pathname !== undefined || source.search !== undefined) {
|
|
source.path = (source.pathname ? source.pathname : '') +
|
|
(source.search ? source.search : '');
|
|
}
|
|
source.auth = relative.auth || source.auth;
|
|
source.slashes = source.slashes || relative.slashes;
|
|
source.href = urlFormat(source);
|
|
return source;
|
|
}
|
|
|
|
function parseHost(host) {
|
|
var out = {};
|
|
var port = portPattern.exec(host);
|
|
if (port) {
|
|
port = port[0];
|
|
if (port !== ':') {
|
|
out.port = port.substr(1);
|
|
}
|
|
host = host.substr(0, host.length - port.length);
|
|
}
|
|
if (host) out.hostname = host;
|
|
return out;
|
|
}
|