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"use strict";
module.exports = URL;
function URL(url) {
if (!url) return Object.create(URL.prototype);
// Can't use String.trim() since it defines whitespace differently than HTML
this.url = url.replace(/^[ \t\n\r\f]+|[ \t\n\r\f]+$/g, "");
// See http://tools.ietf.org/html/rfc3986#appendix-B
// and https://url.spec.whatwg.org/#parsing
var match = URL.pattern.exec(this.url);
if (match) {
if (match[2]) this.scheme = match[2];
if (match[4]) {
// parse username/password
var userinfo = match[4].match(URL.userinfoPattern);
if (userinfo) {
this.username = userinfo[1];
this.password = userinfo[3];
match[4] = match[4].substring(userinfo[0].length);
}
if (match[4].match(URL.portPattern)) {
var pos = match[4].lastIndexOf(':');
this.host = match[4].substring(0, pos);
this.port = match[4].substring(pos+1);
}
else {
this.host = match[4];
}
}
if (match[5]) this.path = match[5];
if (match[6]) this.query = match[7];
if (match[8]) this.fragment = match[9];
}
}
URL.pattern = /^(([^:\/?#]+):)?(\/\/([^\/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?$/;
URL.userinfoPattern = /^([^@:]*)(:([^@]*))?@/;
URL.portPattern = /:\d+$/;
URL.authorityPattern = /^[^:\/?#]+:\/\//;
URL.hierarchyPattern = /^[^:\/?#]+:\//;
// Return a percentEncoded version of s.
// S should be a single-character string
// XXX: needs to do utf-8 encoding?
URL.percentEncode = function percentEncode(s) {
var c = s.charCodeAt(0);
if (c < 256) return "%" + c.toString(16);
else throw Error("can't percent-encode codepoints > 255 yet");
};
URL.prototype = {
constructor: URL,
// XXX: not sure if this is the precise definition of absolute
isAbsolute: function() { return !!this.scheme; },
isAuthorityBased: function() {
return URL.authorityPattern.test(this.url);
},
isHierarchical: function() {
return URL.hierarchyPattern.test(this.url);
},
toString: function() {
var s = "";
if (this.scheme !== undefined) s += this.scheme + ":";
if (this.isAbsolute()) {
s += '//';
if (this.username || this.password) {
s += this.username || '';
if (this.password) {
s += ':' + this.password;
}
s += '@';
}
if (this.host) {
s += this.host;
}
}
if (this.port !== undefined) s += ":" + this.port;
if (this.path !== undefined) s += this.path;
if (this.query !== undefined) s += "?" + this.query;
if (this.fragment !== undefined) s += "#" + this.fragment;
return s;
},
// See: http://tools.ietf.org/html/rfc3986#section-5.2
// and https://url.spec.whatwg.org/#constructors
resolve: function(relative) {
var base = this; // The base url we're resolving against
var r = new URL(relative); // The relative reference url to resolve
var t = new URL(); // The absolute target url we will return
if (r.scheme !== undefined) {
t.scheme = r.scheme;
t.username = r.username;
t.password = r.password;
t.host = r.host;
t.port = r.port;
t.path = remove_dot_segments(r.path);
t.query = r.query;
}
else {
t.scheme = base.scheme;
if (r.host !== undefined) {
t.username = r.username;
t.password = r.password;
t.host = r.host;
t.port = r.port;
t.path = remove_dot_segments(r.path);
t.query = r.query;
}
else {
t.username = base.username;
t.password = base.password;
t.host = base.host;
t.port = base.port;
if (!r.path) { // undefined or empty
t.path = base.path;
if (r.query !== undefined)
t.query = r.query;
else
t.query = base.query;
}
else {
if (r.path.charAt(0) === "/") {
t.path = remove_dot_segments(r.path);
}
else {
t.path = merge(base.path, r.path);
t.path = remove_dot_segments(t.path);
}
t.query = r.query;
}
}
}
t.fragment = r.fragment;
return t.toString();
function merge(basepath, refpath) {
if (base.host !== undefined && !base.path)
return "/" + refpath;
var lastslash = basepath.lastIndexOf("/");
if (lastslash === -1)
return refpath;
else
return basepath.substring(0, lastslash+1) + refpath;
}
function remove_dot_segments(path) {
if (!path) return path; // For "" or undefined
var output = "";
while(path.length > 0) {
if (path === "." || path === "..") {
path = "";
break;
}
var twochars = path.substring(0,2);
var threechars = path.substring(0,3);
var fourchars = path.substring(0,4);
if (threechars === "../") {
path = path.substring(3);
}
else if (twochars === "./") {
path = path.substring(2);
}
else if (threechars === "/./") {
path = "/" + path.substring(3);
}
else if (twochars === "/." && path.length === 2) {
path = "/";
}
else if (fourchars === "/../" ||
(threechars === "/.." && path.length === 3)) {
path = "/" + path.substring(4);
output = output.replace(/\/?[^\/]*$/, "");
}
else {
var segment = path.match(/(\/?([^\/]*))/)[0];
output += segment;
path = path.substring(segment.length);
}
}
return output;
}
},
};
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