| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| part of dart.core; |
| |
| /** |
| * A parsed URI, as specified by RFC-3986, http://tools.ietf.org/html/rfc3986. |
| */ |
| class Uri { |
| int _port; |
| String _path; |
| |
| /** |
| * Returns the scheme component. |
| * |
| * Returns the empty string if there is no scheme component. |
| */ |
| final String scheme; |
| |
| /** |
| * Returns the authority component. |
| * |
| * The authority is formatted from the [userInfo], [host] and [port] |
| * parts. |
| * |
| * Returns the empty string if there is no authority component. |
| */ |
| String get authority { |
| if (!hasAuthority) return ""; |
| var sb = new StringBuffer(); |
| _writeAuthority(sb); |
| return sb.toString(); |
| } |
| |
| /** |
| * Returns the user info part of the authority component. |
| * |
| * Returns the empty string if there is no user info in the |
| * authority component. |
| */ |
| final String userInfo; |
| |
| /** |
| * Returns the host part of the authority component. |
| * |
| * Returns the empty string if there is no authority component and |
| * hence no host. |
| */ |
| final String host; |
| |
| /** |
| * Returns the port part of the authority component. |
| * |
| * Returns 0 if there is no port in the authority component. |
| */ |
| int get port => _port; |
| |
| /** |
| * Returns the path component. |
| * |
| * The returned path is encoded. To get direct access to the decoded |
| * path use [pathSegments]. |
| * |
| * Returns the empty string if there is no path component. |
| */ |
| String get path => _path; |
| |
| /** |
| * Returns the query component. The returned query is encoded. To get |
| * direct access to the decoded query use [queryParameters]. |
| * |
| * Returns the empty string if there is no query component. |
| */ |
| final String query; |
| |
| /** |
| * Returns the fragment identifier component. |
| * |
| * Returns the empty string if there is no fragment identifier |
| * component. |
| */ |
| final String fragment; |
| |
| /** |
| * Cache the computed return value of [pathSegements]. |
| */ |
| List<String> _pathSegments; |
| |
| /** |
| * Cache the computed return value of [queryParameters]. |
| */ |
| Map<String, String> _queryParameters; |
| |
| /** |
| * Creates a new URI object by parsing a URI string. |
| */ |
| static Uri parse(String uri) => new Uri._fromMatch(_splitRe.firstMatch(uri)); |
| |
| Uri._fromMatch(Match m) : |
| this(scheme: _emptyIfNull(m[_COMPONENT_SCHEME]), |
| userInfo: _emptyIfNull(m[_COMPONENT_USER_INFO]), |
| host: _eitherOf( |
| m[_COMPONENT_HOST], m[_COMPONENT_HOST_IPV6]), |
| port: _parseIntOrZero(m[_COMPONENT_PORT]), |
| path: _emptyIfNull(m[_COMPONENT_PATH]), |
| query: _emptyIfNull(m[_COMPONENT_QUERY_DATA]), |
| fragment: _emptyIfNull(m[_COMPONENT_FRAGMENT])); |
| |
| /* |
| * Create a new URI from its components. |
| * |
| * Each component is set through a named argument. Any number of |
| * components can be provided. The default value for the components |
| * not provided is the empry string, except for [port] which has a |
| * default value of 0. The [path] and [query] components can be set |
| * using two different named arguments. |
| * |
| * The scheme component is set through [scheme]. The scheme is |
| * normalized to all lowercase letters. |
| * |
| * The user info part of the authority component is set through |
| * [userInfo]. |
| * |
| * The host part of the authority component is set through |
| * [host]. The host can either be a hostname, a IPv4 address or an |
| * IPv6 address, contained in '[' and ']'. If the host contains a |
| * ':' character, the '[' and ']' are added if not already provided. |
| * |
| * The port part of the authority component is set through |
| * [port]. The port is normalized for scheme http and https where |
| * port 80 and port 443 respectively is set. |
| * |
| * The path component is set through either [path] or |
| * [pathSegments]. When [path] is used, the provided string is |
| * expected to be fully percent-encoded, and is used in its literal |
| * form. When [pathSegments] is used, each of the provided segments |
| * is percent-encoded and joined using the forward slash |
| * separator. The percent-encoding of the path segments encodes all |
| * characters except for the unreserved characters and the following |
| * list of characters: `!$&'()*+,;=:@`. If the other components |
| * calls for an absolute path a leading slash `/` is prepended if |
| * not already there. |
| * |
| * The query component is set through either [query] or |
| * [queryParameters]. When [query] is used the provided string is |
| * expected to be fully percent-encoded and is used in its literal |
| * form. When [queryParameters] is used the query is built from the |
| * provided map. Each key and value in the map is percent-encoded |
| * and joined using equal and ampersand characters. The |
| * percent-encoding of the keys and values encodes all characters |
| * except for the unreserved characters. |
| * |
| * The fragment component is set through [fragment]. |
| */ |
| Uri({scheme, |
| this.userInfo: "", |
| this.host: "", |
| port: 0, |
| String path, |
| List<String> pathSegments, |
| String query, |
| Map<String, String> queryParameters, |
| fragment: ""}) : |
| scheme = _makeScheme(scheme), |
| query = _makeQuery(query, queryParameters), |
| fragment = _makeFragment(fragment) { |
| // Perform scheme specific normalization. |
| if (scheme == "http" && port == 80) { |
| _port = 0; |
| } else if (scheme == "https" && port == 443) { |
| _port = 0; |
| } else { |
| _port = port; |
| } |
| // Fill the path. |
| _path = _makePath(path, pathSegments); |
| } |
| |
| /* |
| * Returns the URI path split into its segments. Each of the |
| * segments in the returned list have been decoded. If the path is |
| * empty the empty list will be returned. A leading slash `/` does |
| * not affect the segments returned. |
| * |
| * The returned list is unmodifiable and will throw [UnsupportedError] on any |
| * calls that would mutate it. |
| */ |
| List<String> get pathSegments { |
| if (_pathSegments == null) { |
| var pathToSplit = !path.isEmpty && path.codeUnitAt(0) == _SLASH |
| ? path.substring(1) |
| : path; |
| _pathSegments = new UnmodifiableListView( |
| pathToSplit == "" ? const<String>[] |
| : pathToSplit.split("/") |
| .map(Uri.decodeComponent) |
| .toList(growable: false)); |
| } |
| return _pathSegments; |
| } |
| |
| /* |
| * Returns the URI query split into a map according to the rules |
| * specified for FORM post in the HTML 4.01 specification. Each key |
| * and value in the returned map have been decoded. If there is no |
| * query the empty map will be returned. |
| * |
| * The returned map is unmodifiable and will throw [UnsupportedError] on any |
| * calls that would mutate it. |
| */ |
| Map<String, String> get queryParameters { |
| if (_queryParameters == null) { |
| var map; |
| map = query.split("&").fold({}, (map, element) { |
| int index = element.indexOf("="); |
| if (index == -1) { |
| if (!element.isEmpty) map[decodeQueryComponent(element)] = ""; |
| } else if (index != 0) { |
| var key = element.substring(0, index); |
| var value = element.substring(index + 1); |
| map[Uri.decodeQueryComponent(key)] = decodeQueryComponent(value); |
| } |
| return map; |
| }); |
| _queryParameters = new _UnmodifiableMap(map); |
| } |
| return _queryParameters; |
| } |
| |
| static String _makeScheme(String scheme) { |
| bool isSchemeLowerCharacter(int ch) { |
| return ch < 128 && |
| ((_schemeLowerTable[ch >> 4] & (1 << (ch & 0x0f))) != 0); |
| } |
| |
| bool isSchemeCharacter(int ch) { |
| return ch < 128 && ((_schemeTable[ch >> 4] & (1 << (ch & 0x0f))) != 0); |
| } |
| |
| if (scheme == null) return ""; |
| bool allLowercase = true; |
| int length = scheme.length; |
| for (int i = 0; i < length; i++) { |
| int codeUnit = scheme.codeUnitAt(i); |
| if (!isSchemeLowerCharacter(codeUnit)) { |
| if (isSchemeCharacter(codeUnit)) { |
| allLowercase = false; |
| } else { |
| throw new ArgumentError('Illegal scheme: $scheme'); |
| } |
| } |
| } |
| |
| return allLowercase ? scheme : scheme.toLowerCase(); |
| } |
| |
| String _makePath(String path, List<String> pathSegments) { |
| if (path == null && pathSegments == null) return ""; |
| if (path != null && pathSegments != null) { |
| throw new ArgumentError('Both path and pathSegments specified'); |
| } |
| var result; |
| if (path != null) { |
| result = _normalize(path); |
| } else { |
| result = pathSegments.map((s) => _uriEncode(_pathCharTable, s)).join("/"); |
| } |
| if ((hasAuthority || (scheme == "file")) && |
| result.isNotEmpty && !result.startsWith("/")) { |
| return "/$result"; |
| } |
| return result; |
| } |
| |
| static String _makeQuery(String query, Map<String, String> queryParameters) { |
| if (query == null && queryParameters == null) return ""; |
| if (query != null && queryParameters != null) { |
| throw new ArgumentError('Both query and queryParameters specified'); |
| } |
| if (query != null) return _normalize(query); |
| |
| var result = new StringBuffer(); |
| var first = true; |
| queryParameters.forEach((key, value) { |
| if (!first) { |
| result.write("&"); |
| } |
| first = false; |
| result.write(Uri.encodeQueryComponent(key)); |
| if (value != null && !value.isEmpty) { |
| result.write("="); |
| result.write(Uri.encodeQueryComponent(value)); |
| } |
| }); |
| return result.toString(); |
| } |
| |
| static String _makeFragment(String fragment) { |
| if (fragment == null) return ""; |
| return _normalize(fragment); |
| } |
| |
| static String _normalize(String component) { |
| bool isNormalizedHexDigit(int digit) { |
| return (_ZERO <= digit && digit <= _NINE) || |
| (_UPPER_CASE_A <= digit && digit <= _UPPER_CASE_F); |
| } |
| |
| bool isLowerCaseHexDigit(int digit) { |
| return _LOWER_CASE_A <= digit && digit <= _LOWER_CASE_F; |
| } |
| |
| bool isUnreserved(int ch) { |
| return ch < 128 && |
| ((_unreservedTable[ch >> 4] & (1 << (ch & 0x0f))) != 0); |
| } |
| |
| int normalizeHexDigit(int index) { |
| var codeUnit = component.codeUnitAt(index); |
| if (isLowerCaseHexDigit(codeUnit)) { |
| return codeUnit - 0x20; |
| } else if (!isNormalizedHexDigit(codeUnit)) { |
| throw new ArgumentError("Invalid URI component: $component"); |
| } else { |
| return codeUnit; |
| } |
| } |
| |
| int decodeHexDigitPair(int index) { |
| int byte = 0; |
| for (int i = 0; i < 2; i++) { |
| var codeUnit = component.codeUnitAt(index + i); |
| if (_ZERO <= codeUnit && codeUnit <= _NINE) { |
| byte = byte * 16 + codeUnit - _ZERO; |
| } else { |
| // Check ranges A-F (0x41-0x46) and a-f (0x61-0x66). |
| codeUnit |= 0x20; |
| if (_LOWER_CASE_A <= codeUnit && |
| codeUnit <= _LOWER_CASE_F) { |
| byte = byte * 16 + codeUnit - _LOWER_CASE_A + 10; |
| } else { |
| throw new ArgumentError( |
| "Invalid percent-encoding in URI component: $component"); |
| } |
| } |
| } |
| return byte; |
| } |
| |
| // Start building the normalized component string. |
| StringBuffer result; |
| int length = component.length; |
| int index = 0; |
| int prevIndex = 0; |
| |
| // Copy a part of the component string to the result. |
| void fillResult() { |
| if (result == null) { |
| assert(prevIndex == 0); |
| result = new StringBuffer(component.substring(prevIndex, index)); |
| } else { |
| result.write(component.substring(prevIndex, index)); |
| } |
| } |
| |
| while (index < length) { |
| |
| // Normalize percent encoding to uppercase and don't encode |
| // unreserved characters. |
| if (component.codeUnitAt(index) == _PERCENT) { |
| if (length < index + 2) { |
| throw new ArgumentError( |
| "Invalid percent-encoding in URI component: $component"); |
| } |
| |
| var codeUnit1 = component.codeUnitAt(index + 1); |
| var codeUnit2 = component.codeUnitAt(index + 2); |
| var decodedCodeUnit = decodeHexDigitPair(index + 1); |
| if (isNormalizedHexDigit(codeUnit1) && |
| isNormalizedHexDigit(codeUnit2) && |
| !isUnreserved(decodedCodeUnit)) { |
| index += 3; |
| } else { |
| fillResult(); |
| if (isUnreserved(decodedCodeUnit)) { |
| result.writeCharCode(decodedCodeUnit); |
| } else { |
| result.write("%"); |
| result.writeCharCode(normalizeHexDigit(index + 1)); |
| result.writeCharCode(normalizeHexDigit(index + 2)); |
| } |
| index += 3; |
| prevIndex = index; |
| } |
| } else { |
| index++; |
| } |
| } |
| if (result != null && prevIndex != index) fillResult(); |
| assert(index == length); |
| |
| if (result == null) return component; |
| return result.toString(); |
| } |
| |
| static String _emptyIfNull(String val) => val != null ? val : ''; |
| |
| static int _parseIntOrZero(String val) { |
| if (val != null && val != '') { |
| return int.parse(val); |
| } else { |
| return 0; |
| } |
| } |
| |
| static String _eitherOf(String val1, String val2) { |
| if (val1 != null) return val1; |
| if (val2 != null) return val2; |
| return ''; |
| } |
| |
| // NOTE: This code was ported from: closure-library/closure/goog/uri/utils.js |
| static final RegExp _splitRe = new RegExp( |
| '^' |
| '(?:' |
| '([^:/?#.]+)' // scheme - ignore special characters |
| // used by other URL parts such as :, |
| // ?, /, #, and . |
| ':)?' |
| '(?://' |
| '(?:([^/?#]*)@)?' // userInfo |
| '(?:' |
| r'([\w\d\-\u0100-\uffff.%]*)' |
| // host - restrict to letters, |
| // digits, dashes, dots, percent |
| // escapes, and unicode characters. |
| '|' |
| // TODO(ajohnsen): Only allow a max number of parts? |
| r'\[([A-Fa-f0-9:.]*)\])' |
| // IPv6 host - restrict to hex, |
| // dot and colon. |
| '(?::([0-9]+))?' // port |
| ')?' |
| r'([^?#[]+)?' // path |
| r'(?:\?([^#]*))?' // query |
| '(?:#(.*))?' // fragment |
| r'$'); |
| |
| static const _COMPONENT_SCHEME = 1; |
| static const _COMPONENT_USER_INFO = 2; |
| static const _COMPONENT_HOST = 3; |
| static const _COMPONENT_HOST_IPV6 = 4; |
| static const _COMPONENT_PORT = 5; |
| static const _COMPONENT_PATH = 6; |
| static const _COMPONENT_QUERY_DATA = 7; |
| static const _COMPONENT_FRAGMENT = 8; |
| |
| /** |
| * Returns whether the URI is absolute. |
| */ |
| bool get isAbsolute => scheme != "" && fragment == ""; |
| |
| String _merge(String base, String reference) { |
| if (base == "") return "/$reference"; |
| return "${base.substring(0, base.lastIndexOf("/") + 1)}$reference"; |
| } |
| |
| bool _hasDotSegments(String path) { |
| if (path.length > 0 && path.codeUnitAt(0) == _COLON) return true; |
| int index = path.indexOf("/."); |
| return index != -1; |
| } |
| |
| String _removeDotSegments(String path) { |
| if (!_hasDotSegments(path)) return path; |
| List<String> output = []; |
| bool appendSlash = false; |
| for (String segment in path.split("/")) { |
| appendSlash = false; |
| if (segment == "..") { |
| if (!output.isEmpty && |
| ((output.length != 1) || (output[0] != ""))) output.removeLast(); |
| appendSlash = true; |
| } else if ("." == segment) { |
| appendSlash = true; |
| } else { |
| output.add(segment); |
| } |
| } |
| if (appendSlash) output.add(""); |
| return output.join("/"); |
| } |
| |
| Uri resolve(String uri) { |
| return resolveUri(Uri.parse(uri)); |
| } |
| |
| Uri resolveUri(Uri reference) { |
| // From RFC 3986. |
| String targetScheme; |
| String targetUserInfo; |
| String targetHost; |
| int targetPort; |
| String targetPath; |
| String targetQuery; |
| if (reference.scheme != "") { |
| targetScheme = reference.scheme; |
| targetUserInfo = reference.userInfo; |
| targetHost = reference.host; |
| targetPort = reference.port; |
| targetPath = _removeDotSegments(reference.path); |
| targetQuery = reference.query; |
| } else { |
| if (reference.hasAuthority) { |
| targetUserInfo = reference.userInfo; |
| targetHost = reference.host; |
| targetPort = reference.port; |
| targetPath = _removeDotSegments(reference.path); |
| targetQuery = reference.query; |
| } else { |
| if (reference.path == "") { |
| targetPath = this.path; |
| if (reference.query != "") { |
| targetQuery = reference.query; |
| } else { |
| targetQuery = this.query; |
| } |
| } else { |
| if (reference.path.startsWith("/")) { |
| targetPath = _removeDotSegments(reference.path); |
| } else { |
| targetPath = _removeDotSegments(_merge(this.path, reference.path)); |
| } |
| targetQuery = reference.query; |
| } |
| targetUserInfo = this.userInfo; |
| targetHost = this.host; |
| targetPort = this.port; |
| } |
| targetScheme = this.scheme; |
| } |
| return new Uri(scheme: targetScheme, |
| userInfo: targetUserInfo, |
| host: targetHost, |
| port: targetPort, |
| path: targetPath, |
| query: targetQuery, |
| fragment: reference.fragment); |
| } |
| |
| bool get hasAuthority => host != ""; |
| |
| /** |
| * Returns the origin of the URI in the form scheme://host:port for the |
| * schemes http and https. |
| * |
| * It is an error if the scheme is not "http" or "https". |
| * |
| * See: http://www.w3.org/TR/2011/WD-html5-20110405/origin-0.html#origin |
| */ |
| String get origin { |
| if (scheme == "" || host == null || host == "") { |
| throw new StateError("Cannot use origin without a scheme: $this"); |
| } |
| if (scheme != "http" && scheme != "https") { |
| throw new StateError( |
| "Origin is only applicable schemes http and https: $this"); |
| } |
| if (port == 0) return "$scheme://$host"; |
| return "$scheme://$host:$port"; |
| } |
| |
| void _writeAuthority(StringSink ss) { |
| _addIfNonEmpty(ss, userInfo, userInfo, "@"); |
| ss.write(host == null ? "null" : |
| host.contains(':') ? '[$host]' : host); |
| if (port != 0) { |
| ss.write(":"); |
| ss.write(port.toString()); |
| } |
| } |
| |
| String toString() { |
| StringBuffer sb = new StringBuffer(); |
| _addIfNonEmpty(sb, scheme, scheme, ':'); |
| if (hasAuthority || (scheme == "file")) { |
| sb.write("//"); |
| _writeAuthority(sb); |
| } |
| sb.write(path); |
| _addIfNonEmpty(sb, query, "?", query); |
| _addIfNonEmpty(sb, fragment, "#", fragment); |
| return sb.toString(); |
| } |
| |
| bool operator==(other) { |
| if (other is! Uri) return false; |
| Uri uri = other; |
| return scheme == uri.scheme && |
| userInfo == uri.userInfo && |
| host == uri.host && |
| port == uri.port && |
| path == uri.path && |
| query == uri.query && |
| fragment == uri.fragment; |
| } |
| |
| int get hashCode { |
| int combine(part, current) { |
| // The sum is truncated to 30 bits to make sure it fits into a Smi. |
| return (current * 31 + part.hashCode) & 0x3FFFFFFF; |
| } |
| return combine(scheme, combine(userInfo, combine(host, combine(port, |
| combine(path, combine(query, combine(fragment, 1))))))); |
| } |
| |
| static void _addIfNonEmpty(StringBuffer sb, String test, |
| String first, String second) { |
| if ("" != test) { |
| sb.write(first); |
| sb.write(second); |
| } |
| } |
| |
| /** |
| * Encode the string [component] using percent-encoding to make it |
| * safe for literal use as a URI component. |
| * |
| * All characters except uppercase and lowercase letters, digits and |
| * the characters `!$&'()*+,;=:@` are percent-encoded. This is the |
| * set of characters specified in RFC 2396 and the which is |
| * specified for the encodeUriComponent in ECMA-262 version 5.1. |
| * |
| * When manually encoding path segments or query components remember |
| * to encode each part separately before building the path or query |
| * string. |
| * |
| * For encoding the query part consider using |
| * [encodeQueryComponent]. |
| * |
| * To avoid the need for explicitly encoding use the [pathSegments] |
| * and [queryParameters] optional named arguments when constructing |
| * a [Uri]. |
| */ |
| static String encodeComponent(String component) { |
| return _uriEncode(_unreserved2396Table, component); |
| } |
| |
| /* |
| * Encode the string [component] according to the HTML 4.01 rules |
| * for encoding the posting of a HTML form as a query string |
| * component. |
| * |
| * Spaces will be replaced with plus and all characters except for |
| * uppercase and lowercase letters, decimal digits and the |
| * characters `-._~`. Note that the set of characters encoded is a |
| * superset of what HTML 4.01 says as it refers to RFC 1738 for |
| * reserved characters. |
| * |
| * When manually encoding query components remember to encode each |
| * part separately before building the query string. |
| * |
| * To avoid the need for explicitly encoding the query use the |
| * [queryParameters] optional named arguments when constructing a |
| * [Uri]. |
| * |
| * See http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.2 for more |
| * details. |
| */ |
| static String encodeQueryComponent(String component) { |
| return _uriEncode(_unreservedTable, component, spaceToPlus: true); |
| } |
| |
| /** |
| * Decodes the percent-encoding in [encodedComponent]. |
| * |
| * Note that decoding a URI component might change its meaning as |
| * some of the decoded characters could be characters with are |
| * delimiters for a given URI componene type. Always split a URI |
| * component using the delimiters for the component before decoding |
| * the individual parts. |
| * |
| * For handling the [path] and [query] components consider using |
| * [pathSegments] and [queryParameters] to get the separated and |
| * decoded component. |
| */ |
| static String decodeComponent(String encodedComponent) { |
| return _uriDecode(encodedComponent); |
| } |
| |
| static String decodeQueryComponent(String encodedComponent) { |
| return _uriDecode(encodedComponent, plusToSpace: true); |
| } |
| |
| /** |
| * Encode the string [uri] using percent-encoding to make it |
| * safe for literal use as a full URI. |
| * |
| * All characters except uppercase and lowercase letters, digits and |
| * the characters `!#$&'()*+,-./:;=?@_~` are percent-encoded. This |
| * is the set of characters specified in in ECMA-262 version 5.1 for |
| * the encodeURI function . |
| */ |
| static String encodeFull(String uri) { |
| return _uriEncode(_encodeFullTable, uri); |
| } |
| |
| /** |
| * Decodes the percent-encoding in [uri]. |
| * |
| * Note that decoding a full URI might change its meaning as some of |
| * the decoded characters could be reserved characters. In most |
| * cases an encoded URI should be parsed into components using |
| * [Uri.parse] before decoding the separate components. |
| */ |
| static String decodeFull(String uri) { |
| return _uriDecode(uri); |
| } |
| |
| // Frequently used character codes. |
| static const int _PERCENT = 0x25; |
| static const int _PLUS = 0x2B; |
| static const int _SLASH = 0x2F; |
| static const int _ZERO = 0x30; |
| static const int _NINE = 0x39; |
| static const int _COLON = 0x3A; |
| static const int _UPPER_CASE_A = 0x41; |
| static const int _UPPER_CASE_F = 0x46; |
| static const int _LOWER_CASE_A = 0x61; |
| static const int _LOWER_CASE_F = 0x66; |
| |
| /** |
| * This is the internal implementation of JavaScript's encodeURI function. |
| * It encodes all characters in the string [text] except for those |
| * that appear in [canonicalTable], and returns the escaped string. |
| */ |
| static String _uriEncode(List<int> canonicalTable, |
| String text, |
| {bool spaceToPlus: false}) { |
| byteToHex(int v) { |
| final String hex = '0123456789ABCDEF'; |
| return '%${hex[v >> 4]}${hex[v & 0x0f]}'; |
| } |
| |
| StringBuffer result = new StringBuffer(); |
| for (int i = 0; i < text.length; i++) { |
| int ch = text.codeUnitAt(i); |
| if (ch < 128 && ((canonicalTable[ch >> 4] & (1 << (ch & 0x0f))) != 0)) { |
| result.write(text[i]); |
| } else if (spaceToPlus && text[i] == " ") { |
| result.write("+"); |
| } else { |
| if (ch >= 0xD800 && ch < 0xDC00) { |
| // Low surrogate. We expect a next char high surrogate. |
| ++i; |
| int nextCh = text.length == i ? 0 : text.codeUnitAt(i); |
| if (nextCh >= 0xDC00 && nextCh < 0xE000) { |
| // convert the pair to a U+10000 codepoint |
| ch = 0x10000 + ((ch - 0xD800) << 10) + (nextCh - 0xDC00); |
| } else { |
| throw new ArgumentError('Malformed URI'); |
| } |
| } |
| for (int codepoint in codepointsToUtf8([ch])) { |
| result.write(byteToHex(codepoint)); |
| } |
| } |
| } |
| return result.toString(); |
| } |
| |
| /** |
| * Convert a byte (2 character hex sequence) in string [s] starting |
| * at position [pos] to its ordinal value |
| */ |
| static int _hexCharPairToByte(String s, int pos) { |
| int byte = 0; |
| for (int i = 0; i < 2; i++) { |
| var charCode = s.codeUnitAt(pos + i); |
| if (0x30 <= charCode && charCode <= 0x39) { |
| byte = byte * 16 + charCode - 0x30; |
| } else { |
| // Check ranges A-F (0x41-0x46) and a-f (0x61-0x66). |
| charCode |= 0x20; |
| if (0x61 <= charCode && charCode <= 0x66) { |
| byte = byte * 16 + charCode - 0x57; |
| } else { |
| throw new ArgumentError("Invalid URL encoding"); |
| } |
| } |
| } |
| return byte; |
| } |
| |
| /** |
| * A JavaScript-like decodeURI function. It unescapes the string [text] and |
| * returns the unescaped string. |
| */ |
| static String _uriDecode(String text, {bool plusToSpace: false}) { |
| StringBuffer result = new StringBuffer(); |
| List<int> codepoints = new List<int>(); |
| for (int i = 0; i < text.length;) { |
| int ch = text.codeUnitAt(i); |
| if (ch != _PERCENT) { |
| if (plusToSpace && ch == _PLUS) { |
| result.write(" "); |
| } else { |
| result.writeCharCode(ch); |
| } |
| i++; |
| } else { |
| codepoints.clear(); |
| while (ch == _PERCENT) { |
| if (++i > text.length - 2) { |
| throw new ArgumentError('Truncated URI'); |
| } |
| codepoints.add(_hexCharPairToByte(text, i)); |
| i += 2; |
| if (i == text.length) break; |
| ch = text.codeUnitAt(i); |
| } |
| result.write(decodeUtf8(codepoints)); |
| } |
| } |
| return result.toString(); |
| } |
| |
| // Tables of char-codes organized as a bit vector of 128 bits where |
| // each bit indicate whether a character code on the 0-127 needs to |
| // be escaped or not. |
| |
| // The unreserved characters of RFC 3986. |
| static const _unreservedTable = const [ |
| // LSB MSB |
| // | | |
| 0x0000, // 0x00 - 0x0f 0000000000000000 |
| 0x0000, // 0x10 - 0x1f 0000000000000000 |
| // -. |
| 0x6000, // 0x20 - 0x2f 0000000000000110 |
| // 0123456789 |
| 0x03ff, // 0x30 - 0x3f 1111111111000000 |
| // ABCDEFGHIJKLMNO |
| 0xfffe, // 0x40 - 0x4f 0111111111111111 |
| // PQRSTUVWXYZ _ |
| 0x87ff, // 0x50 - 0x5f 1111111111100001 |
| // abcdefghijklmno |
| 0xfffe, // 0x60 - 0x6f 0111111111111111 |
| // pqrstuvwxyz ~ |
| 0x47ff]; // 0x70 - 0x7f 1111111111100010 |
| |
| // The unreserved characters of RFC 2396. |
| static const _unreserved2396Table = const [ |
| // LSB MSB |
| // | | |
| 0x0000, // 0x00 - 0x0f 0000000000000000 |
| 0x0000, // 0x10 - 0x1f 0000000000000000 |
| // ! '()* -. |
| 0x6782, // 0x20 - 0x2f 0100000111100110 |
| // 0123456789 |
| 0x03ff, // 0x30 - 0x3f 1111111111000000 |
| // ABCDEFGHIJKLMNO |
| 0xfffe, // 0x40 - 0x4f 0111111111111111 |
| // PQRSTUVWXYZ _ |
| 0x87ff, // 0x50 - 0x5f 1111111111100001 |
| // abcdefghijklmno |
| 0xfffe, // 0x60 - 0x6f 0111111111111111 |
| // pqrstuvwxyz ~ |
| 0x47ff]; // 0x70 - 0x7f 1111111111100010 |
| |
| // Table of reserved characters specified by ECMAScript 5. |
| static const _encodeFullTable = const [ |
| // LSB MSB |
| // | | |
| 0x0000, // 0x00 - 0x0f 0000000000000000 |
| 0x0000, // 0x10 - 0x1f 0000000000000000 |
| // ! #$ &'()*+,-./ |
| 0xf7da, // 0x20 - 0x2f 0101101111101111 |
| // 0123456789:; = ? |
| 0xafff, // 0x30 - 0x3f 1111111111110101 |
| // @ABCDEFGHIJKLMNO |
| 0xffff, // 0x40 - 0x4f 1111111111111111 |
| // PQRSTUVWXYZ _ |
| 0x87ff, // 0x50 - 0x5f 1111111111100001 |
| // abcdefghijklmno |
| 0xfffe, // 0x60 - 0x6f 0111111111111111 |
| // pqrstuvwxyz ~ |
| 0x47ff]; // 0x70 - 0x7f 1111111111100010 |
| |
| // Characters allowed in the scheme. |
| static const _schemeTable = const [ |
| // LSB MSB |
| // | | |
| 0x0000, // 0x00 - 0x0f 0000000000000000 |
| 0x0000, // 0x10 - 0x1f 0000000000000000 |
| // + -. |
| 0x6800, // 0x20 - 0x2f 0000000000010110 |
| // 0123456789 |
| 0x03ff, // 0x30 - 0x3f 1111111111000000 |
| // ABCDEFGHIJKLMNO |
| 0xfffe, // 0x40 - 0x4f 0111111111111111 |
| // PQRSTUVWXYZ |
| 0x07ff, // 0x50 - 0x5f 1111111111100001 |
| // abcdefghijklmno |
| 0xfffe, // 0x60 - 0x6f 0111111111111111 |
| // pqrstuvwxyz |
| 0x07ff]; // 0x70 - 0x7f 1111111111100010 |
| |
| // Characters allowed in scheme except for upper case letters. |
| static const _schemeLowerTable = const [ |
| // LSB MSB |
| // | | |
| 0x0000, // 0x00 - 0x0f 0000000000000000 |
| 0x0000, // 0x10 - 0x1f 0000000000000000 |
| // + -. |
| 0x6800, // 0x20 - 0x2f 0000000000010110 |
| // 0123456789 |
| 0x03ff, // 0x30 - 0x3f 1111111111000000 |
| // |
| 0x0000, // 0x40 - 0x4f 0111111111111111 |
| // |
| 0x0000, // 0x50 - 0x5f 1111111111100001 |
| // abcdefghijklmno |
| 0xfffe, // 0x60 - 0x6f 0111111111111111 |
| // pqrstuvwxyz |
| 0x07ff]; // 0x70 - 0x7f 1111111111100010 |
| |
| // Sub delimiter characters combined with unreserved as of 3986. |
| // sub-delims = "!" / "$" / "&" / "'" / "(" / ")" |
| // / "*" / "+" / "," / ";" / "=" |
| // RFC 3986 section 2.3. |
| // unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~" |
| static const _subDelimitersTable = const [ |
| // LSB MSB |
| // | | |
| 0x0000, // 0x00 - 0x0f 0000000000000000 |
| 0x0000, // 0x10 - 0x1f 0000000000000000 |
| // ! $ &'()*+,-. |
| 0x7fd2, // 0x20 - 0x2f 0100101111111110 |
| // 0123456789 ; = |
| 0x2bff, // 0x30 - 0x3f 1111111111010100 |
| // ABCDEFGHIJKLMNO |
| 0xfffe, // 0x40 - 0x4f 0111111111111111 |
| // PQRSTUVWXYZ _ |
| 0x87ff, // 0x50 - 0x5f 1111111111100001 |
| // abcdefghijklmno |
| 0xfffe, // 0x60 - 0x6f 0111111111111111 |
| // pqrstuvwxyz ~ |
| 0x47ff]; // 0x70 - 0x7f 1111111111100010 |
| |
| // Characters allowed in the path as of RFC 3986. |
| // RFC 3986 section 3.3. |
| // pchar = unreserved / pct-encoded / sub-delims / ":" / "@" |
| static const _pathCharTable = const [ |
| // LSB MSB |
| // | | |
| 0x0000, // 0x00 - 0x0f 0000000000000000 |
| 0x0000, // 0x10 - 0x1f 0000000000000000 |
| // ! $ &'()*+,-. |
| 0x7fd2, // 0x20 - 0x2f 0100101111111110 |
| // 0123456789:; = |
| 0x2fff, // 0x30 - 0x3f 1111111111110100 |
| // @ABCDEFGHIJKLMNO |
| 0xffff, // 0x40 - 0x4f 1111111111111111 |
| // PQRSTUVWXYZ _ |
| 0x87ff, // 0x50 - 0x5f 1111111111100001 |
| // abcdefghijklmno |
| 0xfffe, // 0x60 - 0x6f 0111111111111111 |
| // pqrstuvwxyz ~ |
| 0x47ff]; // 0x70 - 0x7f 1111111111100010 |
| |
| // Characters allowed in the query as of RFC 3986. |
| // RFC 3986 section 3.4. |
| // query = *( pchar / "/" / "?" ) |
| static const _queryCharTable = const [ |
| // LSB MSB |
| // | | |
| 0x0000, // 0x00 - 0x0f 0000000000000000 |
| 0x0000, // 0x10 - 0x1f 0000000000000000 |
| // ! $ &'()*+,-./ |
| 0xffd2, // 0x20 - 0x2f 0100101111111111 |
| // 0123456789:; = ? |
| 0xafff, // 0x30 - 0x3f 1111111111110101 |
| // @ABCDEFGHIJKLMNO |
| 0xffff, // 0x40 - 0x4f 1111111111111111 |
| // PQRSTUVWXYZ _ |
| 0x87ff, // 0x50 - 0x5f 1111111111100001 |
| // abcdefghijklmno |
| 0xfffe, // 0x60 - 0x6f 0111111111111111 |
| // pqrstuvwxyz ~ |
| 0x47ff]; // 0x70 - 0x7f 1111111111100010 |
| } |
| |
| class _UnmodifiableMap<K, V> implements Map<K, V> { |
| final Map _map; |
| const _UnmodifiableMap(this._map); |
| |
| bool containsValue(V value) => _map.containsValue(value); |
| bool containsKey(K key) => _map.containsKey(key); |
| V operator [](K key) => _map[key]; |
| void operator []=(K key, V value) { |
| throw new UnsupportedError("Cannot modify an unmodifiable map"); |
| } |
| V putIfAbsent(K key, V ifAbsent()) { |
| throw new UnsupportedError("Cannot modify an unmodifiable map"); |
| } |
| V remove(K key) { |
| throw new UnsupportedError("Cannot modify an unmodifiable map"); |
| } |
| void clear() { |
| throw new UnsupportedError("Cannot modify an unmodifiable map"); |
| } |
| void forEach(void f(K key, V value)) => _map.forEach(f); |
| Iterable<K> get keys => _map.keys; |
| Iterable<V> get values => _map.values; |
| int get length => _map.length; |
| bool get isEmpty => _map.isEmpty; |
| bool get isNotEmpty => _map.isNotEmpty; |
| } |
