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URLToolkit

Lightweight library to build an absolute URL from a base URL and a relative URL, written from the spec (RFC 1808)

Script này sẽ không được không được cài đặt trực tiếp. Nó là một thư viện cho các script khác để bao gồm các chỉ thị meta // @require https://update.greatest.deepsurf.us/scripts/382648/695476/URLToolkit.js 

// ==UserScript==
// @name           URLToolkit
// @namespace      https://greatest.deepsurf.us/users/136230
// @description    Lightweight library to build an absolute URL from a base URL and a relative URL, written from the spec (RFC 1808)
// @include        *://*
// @version        2.1.6
// @run-at         document-start
// @grant          none
// ==/UserScript==


// see https://tools.ietf.org/html/rfc1808

/* jshint ignore:start */
(function(root) { 
/* jshint ignore:end */

  var URL_REGEX = /^((?:[a-zA-Z0-9+\-.]+:)?)(\/\/[^\/?#]*)?((?:[^\/\?#]*\/)*.*?)??(;.*?)?(\?.*?)?(#.*?)?$/;
  var FIRST_SEGMENT_REGEX = /^([^\/?#]*)(.*)$/;
  var SLASH_DOT_REGEX = /(?:\/|^)\.(?=\/)/g;
  var SLASH_DOT_DOT_REGEX = /(?:\/|^)\.\.\/(?!\.\.\/).*?(?=\/)/g;

  var URLToolkit = { // jshint ignore:line
    // If opts.alwaysNormalize is true then the path will always be normalized even when it starts with / or //
    // E.g
    // With opts.alwaysNormalize = false (default, spec compliant)
    // http://a.com/b/cd + /e/f/../g => http://a.com/e/f/../g
    // With opts.alwaysNormalize = true (not spec compliant)
    // http://a.com/b/cd + /e/f/../g => http://a.com/e/g
    buildAbsoluteURL: function(baseURL, relativeURL, opts) {
      opts = opts || {};
      // remove any remaining space and CRLF
      baseURL = baseURL.trim();
      relativeURL = relativeURL.trim();
      if (!relativeURL) {
        // 2a) If the embedded URL is entirely empty, it inherits the
        // entire base URL (i.e., is set equal to the base URL)
        // and we are done.
        if (!opts.alwaysNormalize) {
          return baseURL;
        }
        var basePartsForNormalise = URLToolkit.parseURL(baseURL);
        if (!basePartsForNormalise) {
          throw new Error('Error trying to parse base URL.');
        }
        basePartsForNormalise.path = URLToolkit.normalizePath(basePartsForNormalise.path);
        return URLToolkit.buildURLFromParts(basePartsForNormalise);
      }
      var relativeParts = URLToolkit.parseURL(relativeURL);
      if (!relativeParts) {
        throw new Error('Error trying to parse relative URL.');
      }
      if (relativeParts.scheme) {
        // 2b) If the embedded URL starts with a scheme name, it is
        // interpreted as an absolute URL and we are done.
        if (!opts.alwaysNormalize) {
          return relativeURL;
        }
        relativeParts.path = URLToolkit.normalizePath(relativeParts.path);
        return URLToolkit.buildURLFromParts(relativeParts);
      }
      var baseParts = URLToolkit.parseURL(baseURL);
      if (!baseParts) {
        throw new Error('Error trying to parse base URL.');
      }
      if (!baseParts.netLoc && baseParts.path && baseParts.path[0] !== '/') {
        // If netLoc missing and path doesn't start with '/', assume everthing before the first '/' is the netLoc
        // This causes 'example.com/a' to be handled as '//example.com/a' instead of '/example.com/a'
        var pathParts = FIRST_SEGMENT_REGEX.exec(baseParts.path);
        baseParts.netLoc = pathParts[1];
        baseParts.path = pathParts[2];
      }
      if (baseParts.netLoc && !baseParts.path) {
        baseParts.path = '/';
      }
      var builtParts = {
        // 2c) Otherwise, the embedded URL inherits the scheme of
        // the base URL.
        scheme: baseParts.scheme,
        netLoc: relativeParts.netLoc,
        path: null,
        params: relativeParts.params,
        query: relativeParts.query,
        fragment: relativeParts.fragment
      };
      if (!relativeParts.netLoc) {
        // 3) If the embedded URL's <net_loc> is non-empty, we skip to
        // Step 7.  Otherwise, the embedded URL inherits the <net_loc>
        // (if any) of the base URL.
        builtParts.netLoc = baseParts.netLoc;
        // 4) If the embedded URL path is preceded by a slash "/", the
        // path is not relative and we skip to Step 7.
        if (relativeParts.path[0] !== '/') {
          if (!relativeParts.path) {
            // 5) If the embedded URL path is empty (and not preceded by a
            // slash), then the embedded URL inherits the base URL path
            builtParts.path = baseParts.path;
            // 5a) if the embedded URL's <params> is non-empty, we skip to
            // step 7; otherwise, it inherits the <params> of the base
            // URL (if any) and
            if (!relativeParts.params) {
              builtParts.params = baseParts.params;
              // 5b) if the embedded URL's <query> is non-empty, we skip to
              // step 7; otherwise, it inherits the <query> of the base
              // URL (if any) and we skip to step 7.
              if (!relativeParts.query) {
                builtParts.query = baseParts.query;
              }
            }
          } else {
            // 6) The last segment of the base URL's path (anything
            // following the rightmost slash "/", or the entire path if no
            // slash is present) is removed and the embedded URL's path is
            // appended in its place.
            var baseURLPath = baseParts.path;
            var newPath = baseURLPath.substring(0, baseURLPath.lastIndexOf('/') + 1) + relativeParts.path;
            builtParts.path = URLToolkit.normalizePath(newPath);
          }
        }
      }
      if (builtParts.path === null) {
        builtParts.path = opts.alwaysNormalize ? URLToolkit.normalizePath(relativeParts.path) : relativeParts.path;
      }
      return URLToolkit.buildURLFromParts(builtParts);
    },
    parseURL: function(url) {
      var parts = URL_REGEX.exec(url);
      if (!parts) {
        return null;
      }
      return {
        scheme: parts[1] || '',
        netLoc: parts[2] || '',
        path: parts[3] || '',
        params: parts[4] || '',
        query: parts[5] || '',
        fragment: parts[6] || ''
      };
    },
    normalizePath: function(path) {
      // The following operations are
      // then applied, in order, to the new path:
      // 6a) All occurrences of "./", where "." is a complete path
      // segment, are removed.
      // 6b) If the path ends with "." as a complete path segment,
      // that "." is removed.
      path = path.split('').reverse().join('').replace(SLASH_DOT_REGEX, '');
      // 6c) All occurrences of "<segment>/../", where <segment> is a
      // complete path segment not equal to "..", are removed.
      // Removal of these path segments is performed iteratively,
      // removing the leftmost matching pattern on each iteration,
      // until no matching pattern remains.
      // 6d) If the path ends with "<segment>/..", where <segment> is a
      // complete path segment not equal to "..", that
      // "<segment>/.." is removed.
      while (path.length !== (path = path.replace(SLASH_DOT_DOT_REGEX, '')).length) {} // jshint ignore:line
      return path.split('').reverse().join('');
    },
    buildURLFromParts: function(parts) {
      return parts.scheme + parts.netLoc + parts.path + parts.params + parts.query + parts.fragment;
    }
  };

/* jshint ignore:start */
  root["URLToolkit"] = URLToolkit;
})(window);
/* jshint ignore:end */