@angular/compiler
Version:
Angular - the compiler library
292 lines • 31.3 kB
JavaScript
/**
* @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
*/
/**
* Create a {@link UrlResolver} with no package prefix.
*/
export function createUrlResolverWithoutPackagePrefix() {
return new UrlResolver();
}
export function createOfflineCompileUrlResolver() {
return new UrlResolver('.');
}
export var 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.
*/
export function getUrlScheme(url) {
var match = _split(url);
return (match && match[_ComponentIndex.Scheme]) || '';
}
// 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"]}