Better `node:url` polyfill

1 files changed, 807 insertions, 1 deletions

diff --git a/src/node-fallbacks/url.js b/src/node-fallbacks/url.js
index 6c5da9748..fcc8b4db4 100644
--- a/src/node-fallbacks/url.js
+++ b/src/node-fallbacks/url.js
@@ -1 +1,807 @@
-export * from "url";
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+"use strict";
+const { URL, URLSearchParams, [Symbol.for("Bun.lazy")]: lazy } = globalThis;
+
+function util_isString(arg) {
+  return typeof arg === "string";
+}
+function util_isObject(arg) {
+  return typeof arg === "object" && arg !== null;
+}
+function util_isNull(arg) {
+  return arg === null;
+}
+function util_isNullOrUndefined(arg) {
+  return arg == null;
+}
+function util_isUndefined(arg) {
+  return arg === void 0;
+}
+
+function Url() {
+  this.protocol = null;
+  this.slashes = null;
+  this.auth = null;
+  this.host = null;
+  this.port = null;
+  this.hostname = null;
+  this.hash = null;
+  this.search = null;
+  this.query = null;
+  this.pathname = null;
+  this.path = null;
+  this.href = null;
+}
+
+// Reference: RFC 3986, RFC 1808, RFC 2396
+
+// define these here so at least they only have to be
+// compiled once on the first module load.
+var protocolPattern = /^([a-z0-9.+-]+:)/i,
+  portPattern = /:[0-9]*$/,
+  // Special case for a simple path URL
+  simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/,
+  // RFC 2396: characters reserved for delimiting URLs.
+  // We actually just auto-escape these.
+  delims = ["<", ">", '"', "`", " ", "\r", "\n", "\t"],
+  // RFC 2396: characters not allowed for various reasons.
+  unwise = ["{", "}", "|", "\\", "^", "`"].concat(delims),
+  // Allowed by RFCs, but cause of XSS attacks.  Always escape these.
+  autoEscape = ["'"].concat(unwise),
+  // Characters that are never ever allowed in a hostname.
+  // Note that any invalid chars are also handled, but these
+  // are the ones that are *expected* to be seen, so we fast-path
+  // them.
+  nonHostChars = ["%", "/", "?", ";", "#"].concat(autoEscape),
+  hostEndingChars = ["/", "?", "#"],
+  hostnameMaxLen = 255,
+  hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,
+  hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,
+  // protocols that can allow "unsafe" and "unwise" chars.
+  unsafeProtocol = {
+    javascript: true,
+    "javascript:": true,
+  },
+  // protocols that never have a hostname.
+  hostlessProtocol = {
+    javascript: true,
+    "javascript:": true,
+  },
+  // protocols that always contain a // bit.
+  slashedProtocol = {
+    http: true,
+    https: true,
+    ftp: true,
+    gopher: true,
+    file: true,
+    "http:": true,
+    "https:": true,
+    "ftp:": true,
+    "gopher:": true,
+    "file:": true,
+  };
+
+// https://github.com/Cap32/tiny-querystring/blob/master/tiny-querystring.js
+var querystring = {
+  parse(str) {
+    var decode = decodeURIComponent;
+    return (str + "")
+      .replace(/\+/g, " ")
+      .split("&")
+      .filter(Boolean)
+      .reduce(function (obj, item, index) {
+        var ref = item.split("=");
+        var key = decode(ref[0] || "");
+        var val = decode(ref[1] || "");
+        var prev = obj[key];
+        obj[key] = prev === undefined ? val : [].concat(prev, val);
+        return obj;
+      }, {});
+  },
+  stringify(obj) {
+    var encode = encodeURIComponent;
+    return Object.keys(obj || {})
+      .reduce(function (arr, key) {
+        [].concat(obj[key]).forEach(function (v) {
+          arr.push(encode(key) + "=" + encode(v));
+        });
+        return arr;
+      }, [])
+      .join("&")
+      .replace(/\s/g, "+");
+  },
+};
+
+function urlParse(url, parseQueryString, slashesDenoteHost) {
+  if (url && util_isObject(url) && url instanceof Url) return url;
+
+  var u = new Url();
+  u.parse(url, parseQueryString, slashesDenoteHost);
+  return u;
+}
+
+Url.prototype.parse = function (url, parseQueryString, slashesDenoteHost) {
+  if (!isString(url)) {
+    throw new TypeError("Parameter 'url' must be a string, not " + typeof url);
+  }
+
+  // Copy chrome, IE, opera backslash-handling behavior.
+  // Back slashes before the query string get converted to forward slashes
+  // See: https://code.google.com/p/chromium/issues/detail?id=25916
+  var queryIndex = url.indexOf("?"),
+    splitter = queryIndex !== -1 && queryIndex < url.indexOf("#") ? "?" : "#",
+    uSplit = url.split(splitter),
+    slashRegex = /\\/g;
+  uSplit[0] = uSplit[0].replace(slashRegex, "/");
+  url = uSplit.join(splitter);
+
+  var rest = url;
+
+  // trim before proceeding.
+  // This is to support parse stuff like "  http://foo.com  \n"
+  rest = rest.trim();
+
+  if (!slashesDenoteHost && url.split("#").length === 1) {
+    // Try fast path regexp
+    var simplePath = simplePathPattern.exec(rest);
+    if (simplePath) {
+      this.path = rest;
+      this.href = rest;
+      this.pathname = simplePath[1];
+      if (simplePath[2]) {
+        this.search = simplePath[2];
+        if (parseQueryString) {
+          this.query = querystring.parse(this.search.substr(1));
+        } else {
+          this.query = this.search.substr(1);
+        }
+      } else if (parseQueryString) {
+        this.search = "";
+        this.query = {};
+      }
+      return this;
+    }
+  }
+
+  var proto = protocolPattern.exec(rest);
+  if (proto) {
+    proto = proto[0];
+    var lowerProto = proto.toLowerCase();
+    this.protocol = lowerProto;
+    rest = rest.substr(proto.length);
+  }
+
+  // figure out if it's got a host
+  // user@server is *always* interpreted as a hostname, and url
+  // resolution will treat //foo/bar as host=foo,path=bar because that's
+  // how the browser resolves relative URLs.
+  if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
+    var slashes = rest.substr(0, 2) === "//";
+    if (slashes && !(proto && hostlessProtocol[proto])) {
+      rest = rest.substr(2);
+      this.slashes = true;
+    }
+  }
+
+  if (
+    !hostlessProtocol[proto] &&
+    (slashes || (proto && !slashedProtocol[proto]))
+  ) {
+    // there's a hostname.
+    // the first instance of /, ?, ;, or # ends the host.
+    //
+    // If there is an @ in the hostname, then non-host chars *are* allowed
+    // to the left of the last @ sign, unless some host-ending character
+    // comes *before* the @-sign.
+    // URLs are obnoxious.
+    //
+    // ex:
+    // http://a@b@c/ => user:a@b host:c
+    // http://a@b?@c => user:a host:c path:/?@c
+
+    // v0.12 TODO(isaacs): This is not quite how Chrome does things.
+    // Review our test case against browsers more comprehensively.
+
+    // find the first instance of any hostEndingChars
+    var hostEnd = -1;
+    for (var i = 0; i < hostEndingChars.length; i++) {
+      var hec = rest.indexOf(hostEndingChars[i]);
+      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd)) hostEnd = hec;
+    }
+
+    // at this point, either we have an explicit point where the
+    // auth portion cannot go past, or the last @ char is the decider.
+    var auth, atSign;
+    if (hostEnd === -1) {
+      // atSign can be anywhere.
+      atSign = rest.lastIndexOf("@");
+    } else {
+      // atSign must be in auth portion.
+      // http://a@b/c@d => host:b auth:a path:/c@d
+      atSign = rest.lastIndexOf("@", hostEnd);
+    }
+
+    // Now we have a portion which is definitely the auth.
+    // Pull that off.
+    if (atSign !== -1) {
+      auth = rest.slice(0, atSign);
+      rest = rest.slice(atSign + 1);
+      this.auth = decodeURIComponent(auth);
+    }
+
+    // the host is the remaining to the left of the first non-host char
+    hostEnd = -1;
+    for (var i = 0; i < nonHostChars.length; i++) {
+      var hec = rest.indexOf(nonHostChars[i]);
+      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd)) hostEnd = hec;
+    }
+    // if we still have not hit it, then the entire thing is a host.
+    if (hostEnd === -1) hostEnd = rest.length;
+
+    this.host = rest.slice(0, hostEnd);
+    rest = rest.slice(hostEnd);
+
+    // pull out port.
+    this.parseHost();
+
+    // we've indicated that there is a hostname,
+    // so even if it's empty, it has to be present.
+    this.hostname = this.hostname || "";
+
+    // if hostname begins with [ and ends with ]
+    // assume that it's an IPv6 address.
+    var ipv6Hostname =
+      this.hostname[0] === "[" &&
+      this.hostname[this.hostname.length - 1] === "]";
+
+    // validate a little.
+    if (!ipv6Hostname) {
+      var hostparts = this.hostname.split(/\./);
+      for (var i = 0, l = hostparts.length; i < l; i++) {
+        var part = hostparts[i];
+        if (!part) continue;
+        if (!part.match(hostnamePartPattern)) {
+          var newpart = "";
+          for (var j = 0, k = part.length; j < k; j++) {
+            if (part.charCodeAt(j) > 127) {
+              // we replace non-ASCII char with a temporary placeholder
+              // we need this to make sure size of hostname is not
+              // broken by replacing non-ASCII by nothing
+              newpart += "x";
+            } else {
+              newpart += part[j];
+            }
+          }
+          // we test again with ASCII char only
+          if (!newpart.match(hostnamePartPattern)) {
+            var validParts = hostparts.slice(0, i);
+            var notHost = hostparts.slice(i + 1);
+            var bit = part.match(hostnamePartStart);
+            if (bit) {
+              validParts.push(bit[1]);
+              notHost.unshift(bit[2]);
+            }
+            if (notHost.length) {
+              rest = "/" + notHost.join(".") + rest;
+            }
+            this.hostname = validParts.join(".");
+            break;
+          }
+        }
+      }
+    }
+
+    if (this.hostname.length > hostnameMaxLen) {
+      this.hostname = "";
+    } else {
+      // hostnames are always lower case.
+      this.hostname = this.hostname.toLowerCase();
+    }
+
+    if (!ipv6Hostname) {
+      // IDNA Support: Returns a punycoded representation of "domain".
+      // It only converts parts of the domain name that
+      // have non-ASCII characters, i.e. it doesn't matter if
+      // you call it with a domain that already is ASCII-only.
+      this.hostname = new URL(`https://${this.hostname}`).hostname;
+    }
+
+    var p = this.port ? ":" + this.port : "";
+    var h = this.hostname || "";
+    this.host = h + p;
+    this.href += this.host;
+
+    // strip [ and ] from the hostname
+    // the host field still retains them, though
+    if (ipv6Hostname) {
+      this.hostname = this.hostname.substr(1, this.hostname.length - 2);
+      if (rest[0] !== "/") {
+        rest = "/" + rest;
+      }
+    }
+  }
+
+  // now rest is set to the post-host stuff.
+  // chop off any delim chars.
+  if (!unsafeProtocol[lowerProto]) {
+    // First, make 100% sure that any "autoEscape" chars get
+    // escaped, even if encodeURIComponent doesn't think they
+    // need to be.
+    for (var i = 0, l = autoEscape.length; i < l; i++) {
+      var ae = autoEscape[i];
+      if (rest.indexOf(ae) === -1) continue;
+      var esc = encodeURIComponent(ae);
+      if (esc === ae) {
+        esc = escape(ae);
+      }
+      rest = rest.split(ae).join(esc);
+    }
+  }
+
+  // chop off from the tail first.
+  var hash = rest.indexOf("#");
+  if (hash !== -1) {
+    // got a fragment string.
+    this.hash = rest.substr(hash);
+    rest = rest.slice(0, hash);
+  }
+  var qm = rest.indexOf("?");
+  if (qm !== -1) {
+    this.search = rest.substr(qm);
+    this.query = rest.substr(qm + 1);
+    if (parseQueryString) {
+      this.query = querystring.parse(this.query);
+    }
+    rest = rest.slice(0, qm);
+  } else if (parseQueryString) {
+    // no query string, but parseQueryString still requested
+    this.search = "";
+    this.query = {};
+  }
+  if (rest) this.pathname = rest;
+  if (slashedProtocol[lowerProto] && this.hostname && !this.pathname) {
+    this.pathname = "/";
+  }
+
+  //to support http.request
+  if (this.pathname || this.search) {
+    var p = this.pathname || "";
+    var s = this.search || "";
+    this.path = p + s;
+  }
+
+  // finally, reconstruct the href based on what has been validated.
+  this.href = this.format();
+  return this;
+};
+
+// format a parsed object into a url string
+function urlFormat(obj) {
+  // ensure it's an object, and not a string url.
+  // If it's an obj, this is a no-op.
+  // this way, you can call url_format() on strings
+  // to clean up potentially wonky urls.
+  if (isString(obj)) obj = urlParse(obj);
+  if (!(obj instanceof Url)) return Url.prototype.format.call(obj);
+  return obj.format();
+}
+
+Url.prototype.format = function () {
+  var auth = this.auth || "";
+  if (auth) {
+    auth = encodeURIComponent(auth);
+    auth = auth.replace(/%3A/i, ":");
+    auth += "@";
+  }
+
+  var protocol = this.protocol || "",
+    pathname = this.pathname || "",
+    hash = this.hash || "",
+    host = false,
+    query = "";
+
+  if (this.host) {
+    host = auth + this.host;
+  } else if (this.hostname) {
+    host =
+      auth +
+      (this.hostname.indexOf(":") === -1
+        ? this.hostname
+        : "[" + this.hostname + "]");
+    if (this.port) {
+      host += ":" + this.port;
+    }
+  }
+
+  if (
+    this.query &&
+    util_isObject(this.query) &&
+    Object.keys(this.query).length
+  ) {
+    query = querystring.stringify(this.query);
+  }
+
+  var search = this.search || (query && "?" + query) || "";
+
+  if (protocol && protocol.substr(-1) !== ":") protocol += ":";
+
+  // only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.
+  // unless they had them to begin with.
+  if (
+    this.slashes ||
+    ((!protocol || slashedProtocol[protocol]) && host !== false)
+  ) {
+    host = "//" + (host || "");
+    if (pathname && pathname.charAt(0) !== "/") pathname = "/" + pathname;
+  } else if (!host) {
+    host = "";
+  }
+
+  if (hash && hash.charAt(0) !== "#") hash = "#" + hash;
+  if (search && search.charAt(0) !== "?") search = "?" + search;
+
+  pathname = pathname.replace(/[?#]/g, function (match) {
+    return encodeURIComponent(match);
+  });
+  search = search.replace("#", "%23");
+
+  return protocol + host + pathname + search + hash;
+};
+
+function urlResolve(source, relative) {
+  return urlParse(source, false, true).resolve(relative);
+}
+
+Url.prototype.resolve = function (relative) {
+  return this.resolveObject(urlParse(relative, false, true)).format();
+};
+
+function urlResolveObject(source, relative) {
+  if (!source) return relative;
+  return urlParse(source, false, true).resolveObject(relative);
+}
+
+Url.prototype.resolveObject = function (relative) {
+  if (isString(relative)) {
+    var rel = new Url();
+    rel.parse(relative, false, true);
+    relative = rel;
+  }
+
+  var result = new Url();
+  var tkeys = Object.keys(this);
+  for (var tk = 0; tk < tkeys.length; tk++) {
+    var tkey = tkeys[tk];
+    result[tkey] = this[tkey];
+  }
+
+  // hash is always overridden, no matter what.
+  // even href="" will remove it.
+  result.hash = relative.hash;
+
+  // if the relative url is empty, then there's nothing left to do here.
+  if (relative.href === "") {
+    result.href = result.format();
+    return result;
+  }
+
+  // hrefs like //foo/bar always cut to the protocol.
+  if (relative.slashes && !relative.protocol) {
+    // take everything except the protocol from relative
+    var rkeys = Object.keys(relative);
+    for (var rk = 0; rk < rkeys.length; rk++) {
+      var rkey = rkeys[rk];
+      if (rkey !== "protocol") result[rkey] = relative[rkey];
+    }
+
+    //urlParse appends trailing / to urls like http://www.example.com
+    if (
+      slashedProtocol[result.protocol] &&
+      result.hostname &&
+      !result.pathname
+    ) {
+      result.path = result.pathname = "/";
+    }
+
+    result.href = result.format();
+    return result;
+  }
+
+  if (relative.protocol && relative.protocol !== result.protocol) {
+    // if it's a known url protocol, then changing
+    // the protocol does weird things
+    // first, if it's not file:, then we MUST have a host,
+    // and if there was a path
+    // to begin with, then we MUST have a path.
+    // if it is file:, then the host is dropped,
+    // because that's known to be hostless.
+    // anything else is assumed to be absolute.
+    if (!slashedProtocol[relative.protocol]) {
+      var keys = Object.keys(relative);
+      for (var v = 0; v < keys.length; v++) {
+        var k = keys[v];
+        result[k] = relative[k];
+      }
+      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;
+};
+
+export { URL, URLSearchParams };
+export { urlParse as parse };
+export { urlResolve as resolve };
+export { urlResolveObject as resolveObject };
+export { urlFormat as format };
+export { Url as Url };
+
+export var pathToFileURL;
+export var fileURLToPath;
+
+if (lazy) {
+  pathToFileURL = lazy("pathToFileURL");
+  fileURLToPath = lazy("fileURLToPath");
+}
+
+export default {
+  parse: urlParse,
+  resolve: urlResolve,
+  resolveObject: urlResolveObject,
+  format: urlFormat,
+  Url: Url,
+  pathToFileURL: pathToFileURL,
+  fileURLToPath: fileURLToPath,
+  URL,
+  URLSearchParams,
+};