@angular/compiler/src/url_resolver.js

/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define("@angular/compiler/src/url_resolver", ["require", "exports"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    /**
     * Create a {@link UrlResolver} with no package prefix.
     */
    function createUrlResolverWithoutPackagePrefix() {
        return new exports.UrlResolver();
    }
    exports.createUrlResolverWithoutPackagePrefix = createUrlResolverWithoutPackagePrefix;
    function createOfflineCompileUrlResolver() {
        return new exports.UrlResolver('.');
    }
    exports.createOfflineCompileUrlResolver = createOfflineCompileUrlResolver;
    exports.UrlResolver = /** @class */ (function () {
        function UrlResolverImpl(_packagePrefix) {
            if (_packagePrefix === void 0) { _packagePrefix = null; }
            this._packagePrefix = _packagePrefix;
        }
        /**
         * Resolves the `url` given the `baseUrl`:
         * - when the `url` is null, the `baseUrl` is returned,
         * - if `url` is relative ('path/to/here', './path/to/here'), the resolved url is a combination of
         * `baseUrl` and `url`,
         * - if `url` is absolute (it has a scheme: 'http://', 'https://' or start with '/'), the `url` is
         * returned as is (ignoring the `baseUrl`)
         */
        UrlResolverImpl.prototype.resolve = function (baseUrl, url) {
            var resolvedUrl = url;
            if (baseUrl != null && baseUrl.length > 0) {
                resolvedUrl = _resolveUrl(baseUrl, resolvedUrl);
            }
            var resolvedParts = _split(resolvedUrl);
            var prefix = this._packagePrefix;
            if (prefix != null && resolvedParts != null &&
                resolvedParts[_ComponentIndex.Scheme] == 'package') {
                var path = resolvedParts[_ComponentIndex.Path];
                prefix = prefix.replace(/\/+$/, '');
                path = path.replace(/^\/+/, '');
                return prefix + "/" + path;
            }
            return resolvedUrl;
        };
        return UrlResolverImpl;
    }());
    /**
     * Extract the scheme of a URL.
     */
    function getUrlScheme(url) {
        var match = _split(url);
        return (match && match[_ComponentIndex.Scheme]) || '';
    }
    exports.getUrlScheme = getUrlScheme;
    // The code below is adapted from Traceur:
    // https://github.com/google/traceur-compiler/blob/9511c1dafa972bf0de1202a8a863bad02f0f95a8/src/runtime/url.js
    /**
     * Builds a URI string from already-encoded parts.
     *
     * No encoding is performed.  Any component may be omitted as either null or
     * undefined.
     *
     * @param opt_scheme The scheme such as 'http'.
     * @param opt_userInfo The user name before the '@'.
     * @param opt_domain The domain such as 'www.google.com', already
     *     URI-encoded.
     * @param opt_port The port number.
     * @param opt_path The path, already URI-encoded.  If it is not
     *     empty, it must begin with a slash.
     * @param opt_queryData The URI-encoded query data.
     * @param opt_fragment The URI-encoded fragment identifier.
     * @return The fully combined URI.
     */
    function _buildFromEncodedParts(opt_scheme, opt_userInfo, opt_domain, opt_port, opt_path, opt_queryData, opt_fragment) {
        var out = [];
        if (opt_scheme != null) {
            out.push(opt_scheme + ':');
        }
        if (opt_domain != null) {
            out.push('//');
            if (opt_userInfo != null) {
                out.push(opt_userInfo + '@');
            }
            out.push(opt_domain);
            if (opt_port != null) {
                out.push(':' + opt_port);
            }
        }
        if (opt_path != null) {
            out.push(opt_path);
        }
        if (opt_queryData != null) {
            out.push('?' + opt_queryData);
        }
        if (opt_fragment != null) {
            out.push('#' + opt_fragment);
        }
        return out.join('');
    }
    /**
     * A regular expression for breaking a URI into its component parts.
     *
     * {@link http://www.gbiv.com/protocols/uri/rfc/rfc3986.html#RFC2234} says
     * As the "first-match-wins" algorithm is identical to the "greedy"
     * disambiguation method used by POSIX regular expressions, it is natural and
     * commonplace to use a regular expression for parsing the potential five
     * components of a URI reference.
     *
     * The following line is the regular expression for breaking-down a
     * well-formed URI reference into its components.
     *
     * <pre>
     * ^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?
     *  12            3  4          5       6  7        8 9
     * </pre>
     *
     * The numbers in the second line above are only to assist readability; they
     * indicate the reference points for each subexpression (i.e., each paired
     * parenthesis). We refer to the value matched for subexpression <n> as $<n>.
     * For example, matching the above expression to
     * <pre>
     *     http://www.ics.uci.edu/pub/ietf/uri/#Related
     * </pre>
     * results in the following subexpression matches:
     * <pre>
     *    $1 = http:
     *    $2 = http
     *    $3 = //www.ics.uci.edu
     *    $4 = www.ics.uci.edu
     *    $5 = /pub/ietf/uri/
     *    $6 = <undefined>
     *    $7 = <undefined>
     *    $8 = #Related
     *    $9 = Related
     * </pre>
     * where <undefined> indicates that the component is not present, as is the
     * case for the query component in the above example. Therefore, we can
     * determine the value of the five components as
     * <pre>
     *    scheme    = $2
     *    authority = $4
     *    path      = $5
     *    query     = $7
     *    fragment  = $9
     * </pre>
     *
     * The regular expression has been modified slightly to expose the
     * userInfo, domain, and port separately from the authority.
     * The modified version yields
     * <pre>
     *    $1 = http              scheme
     *    $2 = <undefined>       userInfo -\
     *    $3 = www.ics.uci.edu   domain     | authority
     *    $4 = <undefined>       port     -/
     *    $5 = /pub/ietf/uri/    path
     *    $6 = <undefined>       query without ?
     *    $7 = Related           fragment without #
     * </pre>
     * @internal
     */
    var _splitRe = new RegExp('^' +
        '(?:' +
        '([^:/?#.]+)' + // scheme - ignore special characters
        // used by other URL parts such as :,
        // ?, /, #, and .
        ':)?' +
        '(?://' +
        '(?:([^/?#]*)@)?' + // userInfo
        '([\\w\\d\\-\\u0100-\\uffff.%]*)' + // domain - restrict to letters,
        // digits, dashes, dots, percent
        // escapes, and unicode characters.
        '(?::([0-9]+))?' + // port
        ')?' +
        '([^?#]+)?' + // path
        '(?:\\?([^#]*))?' + // query
        '(?:#(.*))?' + // fragment
        '$');
    /**
     * The index of each URI component in the return value of goog.uri.utils.split.
     * @enum {number}
     */
    var _ComponentIndex;
    (function (_ComponentIndex) {
        _ComponentIndex[_ComponentIndex["Scheme"] = 1] = "Scheme";
        _ComponentIndex[_ComponentIndex["UserInfo"] = 2] = "UserInfo";
        _ComponentIndex[_ComponentIndex["Domain"] = 3] = "Domain";
        _ComponentIndex[_ComponentIndex["Port"] = 4] = "Port";
        _ComponentIndex[_ComponentIndex["Path"] = 5] = "Path";
        _ComponentIndex[_ComponentIndex["QueryData"] = 6] = "QueryData";
        _ComponentIndex[_ComponentIndex["Fragment"] = 7] = "Fragment";
    })(_ComponentIndex || (_ComponentIndex = {}));
    /**
     * Splits a URI into its component parts.
     *
     * Each component can be accessed via the component indices; for example:
     * <pre>
     * goog.uri.utils.split(someStr)[goog.uri.utils.CompontentIndex.QUERY_DATA];
     * </pre>
     *
     * @param uri The URI string to examine.
     * @return Each component still URI-encoded.
     *     Each component that is present will contain the encoded value, whereas
     *     components that are not present will be undefined or empty, depending
     *     on the browser's regular expression implementation.  Never null, since
     *     arbitrary strings may still look like path names.
     */
    function _split(uri) {
        return uri.match(_splitRe);
    }
    /**
      * Removes dot segments in given path component, as described in
      * RFC 3986, section 5.2.4.
      *
      * @param path A non-empty path component.
      * @return Path component with removed dot segments.
      */
    function _removeDotSegments(path) {
        if (path == '/')
            return '/';
        var leadingSlash = path[0] == '/' ? '/' : '';
        var trailingSlash = path[path.length - 1] === '/' ? '/' : '';
        var segments = path.split('/');
        var out = [];
        var up = 0;
        for (var pos = 0; pos < segments.length; pos++) {
            var segment = segments[pos];
            switch (segment) {
                case '':
                case '.':
                    break;
                case '..':
                    if (out.length > 0) {
                        out.pop();
                    }
                    else {
                        up++;
                    }
                    break;
                default:
                    out.push(segment);
            }
        }
        if (leadingSlash == '') {
            while (up-- > 0) {
                out.unshift('..');
            }
            if (out.length === 0)
                out.push('.');
        }
        return leadingSlash + out.join('/') + trailingSlash;
    }
    /**
     * Takes an array of the parts from split and canonicalizes the path part
     * and then joins all the parts.
     */
    function _joinAndCanonicalizePath(parts) {
        var path = parts[_ComponentIndex.Path];
        path = path == null ? '' : _removeDotSegments(path);
        parts[_ComponentIndex.Path] = path;
        return _buildFromEncodedParts(parts[_ComponentIndex.Scheme], parts[_ComponentIndex.UserInfo], parts[_ComponentIndex.Domain], parts[_ComponentIndex.Port], path, parts[_ComponentIndex.QueryData], parts[_ComponentIndex.Fragment]);
    }
    /**
     * Resolves a URL.
     * @param base The URL acting as the base URL.
     * @param to The URL to resolve.
     */
    function _resolveUrl(base, url) {
        var parts = _split(encodeURI(url));
        var baseParts = _split(base);
        if (parts[_ComponentIndex.Scheme] != null) {
            return _joinAndCanonicalizePath(parts);
        }
        else {
            parts[_ComponentIndex.Scheme] = baseParts[_ComponentIndex.Scheme];
        }
        for (var i = _ComponentIndex.Scheme; i <= _ComponentIndex.Port; i++) {
            if (parts[i] == null) {
                parts[i] = baseParts[i];
            }
        }
        if (parts[_ComponentIndex.Path][0] == '/') {
            return _joinAndCanonicalizePath(parts);
        }
        var path = baseParts[_ComponentIndex.Path];
        if (path == null)
            path = '/';
        var index = path.lastIndexOf('/');
        path = path.substring(0, index + 1) + parts[_ComponentIndex.Path];
        parts[_ComponentIndex.Path] = path;
        return _joinAndCanonicalizePath(parts);
    }
});
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* @license\n * Copyright Google Inc. All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Create a {@link UrlResolver} with no package prefix.\n */\nexport function createUrlResolverWithoutPackagePrefix(): UrlResolver {\n  return new UrlResolver();\n}\n\nexport function createOfflineCompileUrlResolver(): UrlResolver {\n  return new UrlResolver('.');\n}\n\n/**\n * Used by the {@link Compiler} when resolving HTML and CSS template URLs.\n *\n * This class can be overridden by the application developer to create custom behavior.\n *\n * See {@link Compiler}\n *\n * ## Example\n *\n * {@example compiler/ts/url_resolver/url_resolver.ts region='url_resolver'}\n *\n * @security  When compiling templates at runtime, you must\n * ensure that the entire template comes from a trusted source.\n * Attacker-controlled data introduced by a template could expose your\n * application to XSS risks. For more detail, see the [Security Guide](http://g.co/ng/security).\n */\nexport interface UrlResolver { resolve(baseUrl: string, url: string): string; }\n\nexport interface UrlResolverCtor { new (packagePrefix?: string|null): UrlResolver; }\n\nexport const UrlResolver: UrlResolverCtor = class UrlResolverImpl {\n  constructor(private _packagePrefix: string|null = null) {}\n\n  /**\n   * Resolves the `url` given the `baseUrl`:\n   * - when the `url` is null, the `baseUrl` is returned,\n   * - if `url` is relative ('path/to/here', './path/to/here'), the resolved url is a combination of\n   * `baseUrl` and `url`,\n   * - if `url` is absolute (it has a scheme: 'http://', 'https://' or start with '/'), the `url` is\n   * returned as is (ignoring the `baseUrl`)\n   */\n  resolve(baseUrl: string, url: string): string {\n    let resolvedUrl = url;\n    if (baseUrl != null && baseUrl.length > 0) {\n      resolvedUrl = _resolveUrl(baseUrl, resolvedUrl);\n    }\n    const resolvedParts = _split(resolvedUrl);\n    let prefix = this._packagePrefix;\n    if (prefix != null && resolvedParts != null &&\n        resolvedParts[_ComponentIndex.Scheme] == 'package') {\n      let path = resolvedParts[_ComponentIndex.Path];\n      prefix = prefix.replace(/\\/+$/, '');\n      path = path.replace(/^\\/+/, '');\n      return `${prefix}/${path}`;\n    }\n    return resolvedUrl;\n  }\n};\n\n/**\n * Extract the scheme of a URL.\n */\nexport function getUrlScheme(url: string): string {\n  const match = _split(url);\n  return (match && match[_ComponentIndex.Scheme]) || '';\n}\n\n// The code below is adapted from Traceur:\n// https://github.com/google/traceur-compiler/blob/9511c1dafa972bf0de1202a8a863bad02f0f95a8/src/runtime/url.js\n\n/**\n * Builds a URI string from already-encoded parts.\n *\n * No encoding is performed.  Any component may be omitted as either null or\n * undefined.\n *\n * @param opt_scheme The scheme such as 'http'.\n * @param opt_userInfo The user name before the '@'.\n * @param opt_domain The domain such as 'www.google.com', already\n *     URI-encoded.\n * @param opt_port The port number.\n * @param opt_path The path, already URI-encoded.  If it is not\n *     empty, it must begin with a slash.\n * @param opt_queryData The URI-encoded query data.\n * @param opt_fragment The URI-encoded fragment identifier.\n * @return The fully combined URI.\n */\nfunction _buildFromEncodedParts(\n    opt_scheme?: string, opt_userInfo?: string, opt_domain?: string, opt_port?: string,\n    opt_path?: string, opt_queryData?: string, opt_fragment?: string): string {\n  const out: string[] = [];\n\n  if (opt_scheme != null) {\n    out.push(opt_scheme + ':');\n  }\n\n  if (opt_domain != null) {\n    out.push('//');\n\n    if (opt_userInfo != null) {\n      out.push(opt_userInfo + '@');\n    }\n\n    out.push(opt_domain);\n\n    if (opt_port != null) {\n      out.push(':' + opt_port);\n    }\n  }\n\n  if (opt_path != null) {\n    out.push(opt_path);\n  }\n\n  if (opt_queryData != null) {\n    out.push('?' + opt_queryData);\n  }\n\n  if (opt_fragment != null) {\n    out.push('#' + opt_fragment);\n  }\n\n  return out.join('');\n}\n\n/**\n * A regular expression for breaking a URI into its component parts.\n *\n * {@link http://www.gbiv.com/protocols/uri/rfc/rfc3986.html#RFC2234} says\n * As the \"first-match-wins\" algorithm is identical to the \"greedy\"\n * disambiguation method used by POSIX regular expressions, it is natural and\n * commonplace to use a regular expression for parsing the potential five\n * components of a URI reference.\n *\n * The following line is the regular expression for breaking-down a\n * well-formed URI reference into its components.\n *\n * <pre>\n * ^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\\?([^#]*))?(#(.*))?\n *  12            3  4          5       6  7        8 9\n * </pre>\n *\n * The numbers in the second line above are only to assist readability; they\n * indicate the reference points for each subexpression (i.e., each paired\n * parenthesis). We refer to the value matched for subexpression <n> as $<n>.\n * For example, matching the above expression to\n * <pre>\n *     http://www.ics.uci.edu/pub/ietf/uri/#Related\n * </pre>\n * results in the following subexpression matches:\n * <pre>\n *    $1 = http:\n *    $2 = http\n *    $3 = //www.ics.uci.edu\n *    $4 = www.ics.uci.edu\n *    $5 = /pub/ietf/uri/\n *    $6 = <undefined>\n *    $7 = <undefined>\n *    $8 = #Related\n *    $9 = Related\n * </pre>\n * where <undefined> indicates that the component is not present, as is the\n * case for the query component in the above example. Therefore, we can\n * determine the value of the five components as\n * <pre>\n *    scheme    = $2\n *    authority = $4\n *    path      = $5\n *    query     = $7\n *    fragment  = $9\n * </pre>\n *\n * The regular expression has been modified slightly to expose the\n * userInfo, domain, and port separately from the authority.\n * The modified version yields\n * <pre>\n *    $1 = http              scheme\n *    $2 = <undefined>       userInfo -\\\n *    $3 = www.ics.uci.edu   domain     | authority\n *    $4 = <undefined>       port     -/\n *    $5 = /pub/ietf/uri/    path\n *    $6 = <undefined>       query without ?\n *    $7 = Related           fragment without #\n * </pre>\n * @internal\n */\nconst _splitRe = new RegExp(\n    '^' +\n    '(?:' +\n    '([^:/?#.]+)' +  // scheme - ignore special characters\n                     // used by other URL parts such as :,\n                     // ?, /, #, and .\n    ':)?' +\n    '(?://' +\n    '(?:([^/?#]*)@)?' +                  // userInfo\n    '([\\\\w\\\\d\\\\-\\\\u0100-\\\\uffff.%]*)' +  // domain - restrict to letters,\n                                         // digits, dashes, dots, percent\n                                         // escapes, and unicode characters.\n    '(?::([0-9]+))?' +                   // port\n    ')?' +\n    '([^?#]+)?' +        // path\n    '(?:\\\\?([^#]*))?' +  // query\n    '(?:#(.*))?' +       // fragment\n    '$');\n\n/**\n * The index of each URI component in the return value of goog.uri.utils.split.\n * @enum {number}\n */\nenum _ComponentIndex {\n  Scheme = 1,\n  UserInfo,\n  Domain,\n  Port,\n  Path,\n  QueryData,\n  Fragment\n}\n\n/**\n * Splits a URI into its component parts.\n *\n * Each component can be accessed via the component indices; for example:\n * <pre>\n * goog.uri.utils.split(someStr)[goog.uri.utils.CompontentIndex.QUERY_DATA];\n * </pre>\n *\n * @param uri The URI string to examine.\n * @return Each component still URI-encoded.\n *     Each component that is present will contain the encoded value, whereas\n *     components that are not present will be undefined or empty, depending\n *     on the browser's regular expression implementation.  Never null, since\n *     arbitrary strings may still look like path names.\n */\nfunction _split(uri: string): Array<string|any> {\n  return uri.match(_splitRe) !;\n}\n\n/**\n  * Removes dot segments in given path component, as described in\n  * RFC 3986, section 5.2.4.\n  *\n  * @param path A non-empty path component.\n  * @return Path component with removed dot segments.\n  */\nfunction _removeDotSegments(path: string): string {\n  if (path == '/') return '/';\n\n  const leadingSlash = path[0] == '/' ? '/' : '';\n  const trailingSlash = path[path.length - 1] === '/' ? '/' : '';\n  const segments = path.split('/');\n\n  const out: string[] = [];\n  let up = 0;\n  for (let pos = 0; pos < segments.length; pos++) {\n    const segment = segments[pos];\n    switch (segment) {\n      case '':\n      case '.':\n        break;\n      case '..':\n        if (out.length > 0) {\n          out.pop();\n        } else {\n          up++;\n        }\n        break;\n      default:\n        out.push(segment);\n    }\n  }\n\n  if (leadingSlash == '') {\n    while (up-- > 0) {\n      out.unshift('..');\n    }\n\n    if (out.length === 0) out.push('.');\n  }\n\n  return leadingSlash + out.join('/') + trailingSlash;\n}\n\n/**\n * Takes an array of the parts from split and canonicalizes the path part\n * and then joins all the parts.\n */\nfunction _joinAndCanonicalizePath(parts: any[]): string {\n  let path = parts[_ComponentIndex.Path];\n  path = path == null ? '' : _removeDotSegments(path);\n  parts[_ComponentIndex.Path] = path;\n\n  return _buildFromEncodedParts(\n      parts[_ComponentIndex.Scheme], parts[_ComponentIndex.UserInfo], parts[_ComponentIndex.Domain],\n      parts[_ComponentIndex.Port], path, parts[_ComponentIndex.QueryData],\n      parts[_ComponentIndex.Fragment]);\n}\n\n/**\n * Resolves a URL.\n * @param base The URL acting as the base URL.\n * @param to The URL to resolve.\n */\nfunction _resolveUrl(base: string, url: string): string {\n  const parts = _split(encodeURI(url));\n  const baseParts = _split(base);\n\n  if (parts[_ComponentIndex.Scheme] != null) {\n    return _joinAndCanonicalizePath(parts);\n  } else {\n    parts[_ComponentIndex.Scheme] = baseParts[_ComponentIndex.Scheme];\n  }\n\n  for (let i = _ComponentIndex.Scheme; i <= _ComponentIndex.Port; i++) {\n    if (parts[i] == null) {\n      parts[i] = baseParts[i];\n    }\n  }\n\n  if (parts[_ComponentIndex.Path][0] == '/') {\n    return _joinAndCanonicalizePath(parts);\n  }\n\n  let path = baseParts[_ComponentIndex.Path];\n  if (path == null) path = '/';\n  const index = path.lastIndexOf('/');\n  path = path.substring(0, index + 1) + parts[_ComponentIndex.Path];\n  parts[_ComponentIndex.Path] = path;\n  return _joinAndCanonicalizePath(parts);\n}\n"]}