| // 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, such as a URL. |
| * |
| * **See also:** |
| * |
| * * [URIs][uris] in the [library tour][libtour] |
| * * [RFC-3986](http://tools.ietf.org/html/rfc3986) |
| * |
| * [uris]: http://www.dartlang.org/docs/dart-up-and-running/contents/ch03.html#ch03-uri |
| * [libtour]: http://www.dartlang.org/docs/dart-up-and-running/contents/ch03.html |
| */ |
| class Uri { |
| /** |
| * The scheme component of the URI. |
| * |
| * Returns the empty string if there is no scheme component. |
| * |
| * A URI scheme is case insensitive. |
| * The returned scheme is canonicalized to lowercase letters. |
| */ |
| // We represent the missing scheme as an empty string. |
| // A valid scheme cannot be empty. |
| final String scheme; |
| |
| /** |
| * The user-info part of the authority. |
| * |
| * Does not distinguish between an empty user-info and an absent one. |
| * The value is always non-null. |
| * Is considered absent if [_host] is `null`. |
| */ |
| final String _userInfo; |
| |
| /** |
| * The host name of the URI. |
| * |
| * Set to `null` if there is no authority in the URI. |
| * The host name is the only mandatory part of an authority, so we use |
| * it to mark whether an authority part was present or not. |
| */ |
| final String _host; |
| |
| /** |
| * The port number part of the authority. |
| * |
| * The port. Set to null if there is no port. Normalized to null if |
| * the port is the default port for the scheme. |
| */ |
| int _port; |
| |
| /** |
| * The path of the URI. |
| * |
| * Always non-null. |
| */ |
| String _path; |
| |
| // The query content, or null if there is no query. |
| final String _query; |
| |
| // The fragment content, or null if there is no fragment. |
| final String _fragment; |
| |
| /** |
| * Cache the computed return value of [pathSegements]. |
| */ |
| List<String> _pathSegments; |
| |
| /** |
| * Cache the computed return value of [queryParameters]. |
| */ |
| Map<String, String> _queryParameters; |
| |
| /// Internal non-verifying constructor. Only call with validated arguments. |
| Uri._internal(this.scheme, |
| this._userInfo, |
| this._host, |
| this._port, |
| this._path, |
| this._query, |
| this._fragment); |
| |
| /** |
| * Creates a new URI from its components. |
| * |
| * Each component is set through a named argument. Any number of |
| * components can be provided. The [path] and [query] components can be set |
| * using either of two different named arguments. |
| * |
| * The scheme component is set through [scheme]. The scheme is |
| * normalized to all lowercase letters. If the scheme is omitted or empty, |
| * the URI will not have a scheme part. |
| * |
| * The user info part of the authority component is set through |
| * [userInfo]. It defaults to the empty string, which will be omitted |
| * from the string representation of the URI. |
| * |
| * The host part of the authority component is set through |
| * [host]. The host can either be a hostname, an IPv4 address or an |
| * IPv6 address, contained in '[' and ']'. If the host contains a |
| * ':' character, the '[' and ']' are added if not already provided. |
| * The host is normalized to all lowercase letters. |
| * |
| * The port part of the authority component is set through |
| * [port]. |
| * If [port] is omitted or `null`, it implies the default port for |
| * the URI's scheme, and is equivalent to passing that port explicitly. |
| * The recognized schemes, and their default ports, are "http" (80) and |
| * "https" (443). All other schemes are considered as having zero as the |
| * default port. |
| * |
| * If any of `userInfo`, `host` or `port` are provided, |
| * the URI will have an autority according to [hasAuthority]. |
| * |
| * The path component is set through either [path] or |
| * [pathSegments]. When [path] is used, it should be a valid URI path, |
| * but invalid characters, except the general delimiters ':/@[]?#', |
| * will be escaped if necessary. |
| * When [pathSegments] is used, each of the provided segments |
| * is first percent-encoded and then 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 should |
| * be a valid URI query, but invalid characters other than general delimiters, |
| * will be escaped if necessary. |
| * 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. |
| * If `query` is the empty string, it is equivalent to omitting it. |
| * To have an actual empty query part, |
| * use an empty list for `queryParameters`. |
| * If both `query` and `queryParameters` are omitted or `null`, the |
| * URI will have no query part. |
| * |
| * The fragment component is set through [fragment]. |
| * It should be a valid URI fragment, but invalid characters other than |
| * general delimiters, will be escaped if necessary. |
| * If `fragment` is omitted or `null`, the URI will have no fragment part. |
| */ |
| factory Uri({String scheme : "", |
| String userInfo : "", |
| String host, |
| int port, |
| String path, |
| Iterable<String> pathSegments, |
| String query, |
| Map<String, String> queryParameters, |
| String fragment}) { |
| scheme = _makeScheme(scheme, 0, _stringOrNullLength(scheme)); |
| userInfo = _makeUserInfo(userInfo, 0, _stringOrNullLength(userInfo)); |
| host = _makeHost(host, 0, _stringOrNullLength(host), false); |
| // Special case this constructor for backwards compatibility. |
| if (query == "") query = null; |
| query = _makeQuery(query, 0, _stringOrNullLength(query), queryParameters); |
| fragment = _makeFragment(fragment, 0, _stringOrNullLength(fragment)); |
| port = _makePort(port, scheme); |
| bool isFile = (scheme == "file"); |
| if (host == null && |
| (userInfo.isNotEmpty || port != null || isFile)) { |
| host = ""; |
| } |
| bool hasAuthority = (host != null); |
| path = _makePath(path, 0, _stringOrNullLength(path), pathSegments, |
| scheme, hasAuthority); |
| if (scheme.isEmpty && host == null && !path.startsWith('/')) { |
| path = _normalizeRelativePath(path); |
| } else { |
| path = _removeDotSegments(path); |
| } |
| return new Uri._internal(scheme, userInfo, host, port, |
| path, query, fragment); |
| } |
| |
| /** |
| * Creates a new `http` URI from authority, path and query. |
| * |
| * Examples: |
| * |
| * ``` |
| * // http://example.org/path?q=dart. |
| * new Uri.http("google.com", "/search", { "q" : "dart" }); |
| * |
| * // http://user:pass@localhost:8080 |
| * new Uri.http("user:pass@localhost:8080", ""); |
| * |
| * // http://example.org/a%20b |
| * new Uri.http("example.org", "a b"); |
| * |
| * // http://example.org/a%252F |
| * new Uri.http("example.org", "/a%2F"); |
| * ``` |
| * |
| * The `scheme` is always set to `http`. |
| * |
| * The `userInfo`, `host` and `port` components are set from the |
| * [authority] argument. If `authority` is `null` or empty, |
| * the created `Uri` will have no authority, and will not be directly usable |
| * as an HTTP URL, which must have a non-empty host. |
| * |
| * The `path` component is set from the [unencodedPath] |
| * argument. The path passed must not be encoded as this constructor |
| * encodes the path. |
| * |
| * The `query` component is set from the optional [queryParameters] |
| * argument. |
| */ |
| factory Uri.http(String authority, |
| String unencodedPath, |
| [Map<String, String> queryParameters]) { |
| return _makeHttpUri("http", authority, unencodedPath, queryParameters); |
| } |
| |
| /** |
| * Creates a new `https` URI from authority, path and query. |
| * |
| * This constructor is the same as [Uri.http] except for the scheme |
| * which is set to `https`. |
| */ |
| factory Uri.https(String authority, |
| String unencodedPath, |
| [Map<String, String> queryParameters]) { |
| return _makeHttpUri("https", authority, unencodedPath, queryParameters); |
| } |
| |
| /** |
| * 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. |
| */ |
| String get userInfo => _userInfo; |
| |
| /** |
| * Returns the host part of the authority component. |
| * |
| * Returns the empty string if there is no authority component and |
| * hence no host. |
| * |
| * If the host is an IP version 6 address, the surrounding `[` and `]` is |
| * removed. |
| * |
| * The host string is case-insensitive. |
| * The returned host name is canonicalized to lower-case |
| * with upper-case percent-escapes. |
| */ |
| String get host { |
| if (_host == null) return ""; |
| if (_host.startsWith('[')) { |
| return _host.substring(1, _host.length - 1); |
| } |
| return _host; |
| } |
| |
| /** |
| * Returns the port part of the authority component. |
| * |
| * Returns the defualt port if there is no port number in the authority |
| * component. That's 80 for http, 443 for https, and 0 for everything else. |
| */ |
| int get port { |
| if (_port == null) return _defaultPort(scheme); |
| return _port; |
| } |
| |
| // The default port for the scheme of this Uri.. |
| static int _defaultPort(String scheme) { |
| if (scheme == "http") return 80; |
| if (scheme == "https") return 443; |
| return 0; |
| } |
| |
| /** |
| * 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. |
| */ |
| String get query => (_query == null) ? "" : _query; |
| |
| /** |
| * Returns the fragment identifier component. |
| * |
| * Returns the empty string if there is no fragment identifier |
| * component. |
| */ |
| String get fragment => (_fragment == null) ? "" : _fragment; |
| |
| /** |
| * Creates a new `Uri` object by parsing a URI string. |
| * |
| * If [start] and [end] are provided, only the substring from `start` |
| * to `end` is parsed as a URI. |
| * |
| * If the string is not valid as a URI or URI reference, |
| * a [FormatException] is thrown. |
| */ |
| static Uri parse(String uri, [int start = 0, int end]) { |
| // This parsing will not validate percent-encoding, IPv6, etc. |
| // When done splitting into parts, it will call, e.g., [_makeFragment] |
| // to do the final parsing. |
| // |
| // Important parts of the RFC 3986 used here: |
| // URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ] |
| // |
| // hier-part = "//" authority path-abempty |
| // / path-absolute |
| // / path-rootless |
| // / path-empty |
| // |
| // URI-reference = URI / relative-ref |
| // |
| // absolute-URI = scheme ":" hier-part [ "?" query ] |
| // |
| // relative-ref = relative-part [ "?" query ] [ "#" fragment ] |
| // |
| // relative-part = "//" authority path-abempty |
| // / path-absolute |
| // / path-noscheme |
| // / path-empty |
| // |
| // scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) |
| // |
| // authority = [ userinfo "@" ] host [ ":" port ] |
| // userinfo = *( unreserved / pct-encoded / sub-delims / ":" ) |
| // host = IP-literal / IPv4address / reg-name |
| // port = *DIGIT |
| // reg-name = *( unreserved / pct-encoded / sub-delims ) |
| // |
| // path = path-abempty ; begins with "/" or is empty |
| // / path-absolute ; begins with "/" but not "//" |
| // / path-noscheme ; begins with a non-colon segment |
| // / path-rootless ; begins with a segment |
| // / path-empty ; zero characters |
| // |
| // path-abempty = *( "/" segment ) |
| // path-absolute = "/" [ segment-nz *( "/" segment ) ] |
| // path-noscheme = segment-nz-nc *( "/" segment ) |
| // path-rootless = segment-nz *( "/" segment ) |
| // path-empty = 0<pchar> |
| // |
| // segment = *pchar |
| // segment-nz = 1*pchar |
| // segment-nz-nc = 1*( unreserved / pct-encoded / sub-delims / "@" ) |
| // ; non-zero-length segment without any colon ":" |
| // |
| // pchar = unreserved / pct-encoded / sub-delims / ":" / "@" |
| // |
| // query = *( pchar / "/" / "?" ) |
| // |
| // fragment = *( pchar / "/" / "?" ) |
| bool isRegName(int ch) { |
| return ch < 128 && ((_regNameTable[ch >> 4] & (1 << (ch & 0x0f))) != 0); |
| } |
| const int EOI = -1; |
| |
| String scheme = ""; |
| String userinfo = ""; |
| String host = null; |
| int port = null; |
| String path = null; |
| String query = null; |
| String fragment = null; |
| if (end == null) end = uri.length; |
| |
| int index = start; |
| int pathStart = start; |
| // End of input-marker. |
| int char = EOI; |
| |
| void parseAuth() { |
| if (index == end) { |
| char = EOI; |
| return; |
| } |
| int authStart = index; |
| int lastColon = -1; |
| int lastAt = -1; |
| char = uri.codeUnitAt(index); |
| while (index < end) { |
| char = uri.codeUnitAt(index); |
| if (char == _SLASH || char == _QUESTION || char == _NUMBER_SIGN) { |
| break; |
| } |
| if (char == _AT_SIGN) { |
| lastAt = index; |
| lastColon = -1; |
| } else if (char == _COLON) { |
| lastColon = index; |
| } else if (char == _LEFT_BRACKET) { |
| lastColon = -1; |
| int endBracket = uri.indexOf(']', index + 1); |
| if (endBracket == -1) { |
| index = end; |
| char = EOI; |
| break; |
| } else { |
| index = endBracket; |
| } |
| } |
| index++; |
| char = EOI; |
| } |
| int hostStart = authStart; |
| int hostEnd = index; |
| if (lastAt >= 0) { |
| userinfo = _makeUserInfo(uri, authStart, lastAt); |
| hostStart = lastAt + 1; |
| } |
| if (lastColon >= 0) { |
| int portNumber; |
| if (lastColon + 1 < index) { |
| portNumber = 0; |
| for (int i = lastColon + 1; i < index; i++) { |
| int digit = uri.codeUnitAt(i); |
| if (_ZERO > digit || _NINE < digit) { |
| _fail(uri, i, "Invalid port number"); |
| } |
| portNumber = portNumber * 10 + (digit - _ZERO); |
| } |
| } |
| port = _makePort(portNumber, scheme); |
| hostEnd = lastColon; |
| } |
| host = _makeHost(uri, hostStart, hostEnd, true); |
| if (index < end) { |
| char = uri.codeUnitAt(index); |
| } |
| } |
| |
| // When reaching path parsing, the current character is known to not |
| // be part of the path. |
| const int NOT_IN_PATH = 0; |
| // When reaching path parsing, the current character is part |
| // of the a non-empty path. |
| const int IN_PATH = 1; |
| // When reaching authority parsing, authority is possible. |
| // This is only true at start or right after scheme. |
| const int ALLOW_AUTH = 2; |
| |
| // Current state. |
| // Initialized to the default value that is used when exiting the |
| // scheme loop by reaching the end of input. |
| // All other breaks set their own state. |
| int state = NOT_IN_PATH; |
| int i = index; // Temporary alias for index to avoid bug 19550 in dart2js. |
| while (i < end) { |
| char = uri.codeUnitAt(i); |
| if (char == _QUESTION || char == _NUMBER_SIGN) { |
| state = NOT_IN_PATH; |
| break; |
| } |
| if (char == _SLASH) { |
| state = (i == start) ? ALLOW_AUTH : IN_PATH; |
| break; |
| } |
| if (char == _COLON) { |
| if (i == start) _fail(uri, start, "Invalid empty scheme"); |
| scheme = _makeScheme(uri, start, i); |
| i++; |
| pathStart = i; |
| if (i == end) { |
| char = EOI; |
| state = NOT_IN_PATH; |
| } else { |
| char = uri.codeUnitAt(i); |
| if (char == _QUESTION || char == _NUMBER_SIGN) { |
| state = NOT_IN_PATH; |
| } else if (char == _SLASH) { |
| state = ALLOW_AUTH; |
| } else { |
| state = IN_PATH; |
| } |
| } |
| break; |
| } |
| i++; |
| char = EOI; |
| } |
| index = i; // Remove alias when bug is fixed. |
| |
| if (state == ALLOW_AUTH) { |
| assert(char == _SLASH); |
| // Have seen one slash either at start or right after scheme. |
| // If two slashes, it's an authority, otherwise it's just the path. |
| index++; |
| if (index == end) { |
| char = EOI; |
| state = NOT_IN_PATH; |
| } else { |
| char = uri.codeUnitAt(index); |
| if (char == _SLASH) { |
| index++; |
| parseAuth(); |
| pathStart = index; |
| } |
| if (char == _QUESTION || char == _NUMBER_SIGN || char == EOI) { |
| state = NOT_IN_PATH; |
| } else { |
| state = IN_PATH; |
| } |
| } |
| } |
| |
| assert(state == IN_PATH || state == NOT_IN_PATH); |
| if (state == IN_PATH) { |
| // Characters from pathStart to index (inclusive) are known |
| // to be part of the path. |
| while (++index < end) { |
| char = uri.codeUnitAt(index); |
| if (char == _QUESTION || char == _NUMBER_SIGN) { |
| break; |
| } |
| char = EOI; |
| } |
| state = NOT_IN_PATH; |
| } |
| |
| assert(state == NOT_IN_PATH); |
| bool hasAuthority = (host != null); |
| path = _makePath(uri, pathStart, index, null, scheme, hasAuthority); |
| |
| if (char == _QUESTION) { |
| int numberSignIndex = -1; |
| for (int i = index + 1; i < end; i++) { |
| if (uri.codeUnitAt(i) == _NUMBER_SIGN) { |
| numberSignIndex = i; |
| break; |
| } |
| } |
| if (numberSignIndex < 0) { |
| query = _makeQuery(uri, index + 1, end, null); |
| } else { |
| query = _makeQuery(uri, index + 1, numberSignIndex, null); |
| fragment = _makeFragment(uri, numberSignIndex + 1, end); |
| } |
| } else if (char == _NUMBER_SIGN) { |
| fragment = _makeFragment(uri, index + 1, end); |
| } |
| return new Uri._internal(scheme, |
| userinfo, |
| host, |
| port, |
| path, |
| query, |
| fragment); |
| } |
| |
| // Report a parse failure. |
| static void _fail(String uri, int index, String message) { |
| throw new FormatException(message, uri, index); |
| } |
| |
| static Uri _makeHttpUri(String scheme, |
| String authority, |
| String unencodedPath, |
| Map<String, String> queryParameters) { |
| var userInfo = ""; |
| var host = null; |
| var port = null; |
| |
| if (authority != null && authority.isNotEmpty) { |
| var hostStart = 0; |
| // Split off the user info. |
| bool hasUserInfo = false; |
| for (int i = 0; i < authority.length; i++) { |
| if (authority.codeUnitAt(i) == _AT_SIGN) { |
| hasUserInfo = true; |
| userInfo = authority.substring(0, i); |
| hostStart = i + 1; |
| break; |
| } |
| } |
| var hostEnd = hostStart; |
| if (hostStart < authority.length && |
| authority.codeUnitAt(hostStart) == _LEFT_BRACKET) { |
| // IPv6 host. |
| for (; hostEnd < authority.length; hostEnd++) { |
| if (authority.codeUnitAt(hostEnd) == _RIGHT_BRACKET) break; |
| } |
| if (hostEnd == authority.length) { |
| throw new FormatException("Invalid IPv6 host entry.", |
| authority, hostStart); |
| } |
| parseIPv6Address(authority, hostStart + 1, hostEnd); |
| hostEnd++; // Skip the closing bracket. |
| if (hostEnd != authority.length && |
| authority.codeUnitAt(hostEnd) != _COLON) { |
| throw new FormatException("Invalid end of authority", |
| authority, hostEnd); |
| } |
| } |
| // Split host and port. |
| bool hasPort = false; |
| for (; hostEnd < authority.length; hostEnd++) { |
| if (authority.codeUnitAt(hostEnd) == _COLON) { |
| var portString = authority.substring(hostEnd + 1); |
| // We allow the empty port - falling back to initial value. |
| if (portString.isNotEmpty) port = int.parse(portString); |
| break; |
| } |
| } |
| host = authority.substring(hostStart, hostEnd); |
| } |
| return new Uri(scheme: scheme, |
| userInfo: userInfo, |
| host: host, |
| port: port, |
| pathSegments: unencodedPath.split("/"), |
| queryParameters: queryParameters); |
| } |
| |
| /** |
| * Creates a new file URI from an absolute or relative file path. |
| * |
| * The file path is passed in [path]. |
| * |
| * This path is interpreted using either Windows or non-Windows |
| * semantics. |
| * |
| * With non-Windows semantics the slash ("/") is used to separate |
| * path segments. |
| * |
| * With Windows semantics, backslash ("\") and forward-slash ("/") |
| * are used to separate path segments, except if the path starts |
| * with "\\?\" in which case, only backslash ("\") separates path |
| * segments. |
| * |
| * If the path starts with a path separator an absolute URI is |
| * created. Otherwise a relative URI is created. One exception from |
| * this rule is that when Windows semantics is used and the path |
| * starts with a drive letter followed by a colon (":") and a |
| * path separator then an absolute URI is created. |
| * |
| * The default for whether to use Windows or non-Windows semantics |
| * determined from the platform Dart is running on. When running in |
| * the standalone VM this is detected by the VM based on the |
| * operating system. When running in a browser non-Windows semantics |
| * is always used. |
| * |
| * To override the automatic detection of which semantics to use pass |
| * a value for [windows]. Passing `true` will use Windows |
| * semantics and passing `false` will use non-Windows semantics. |
| * |
| * Examples using non-Windows semantics: |
| * |
| * ``` |
| * // xxx/yyy |
| * new Uri.file("xxx/yyy", windows: false); |
| * |
| * // xxx/yyy/ |
| * new Uri.file("xxx/yyy/", windows: false); |
| * |
| * // file:///xxx/yyy |
| * new Uri.file("/xxx/yyy", windows: false); |
| * |
| * // file:///xxx/yyy/ |
| * new Uri.file("/xxx/yyy/", windows: false); |
| * |
| * // C: |
| * new Uri.file("C:", windows: false); |
| * ``` |
| * |
| * Examples using Windows semantics: |
| * |
| * ``` |
| * // xxx/yyy |
| * new Uri.file(r"xxx\yyy", windows: true); |
| * |
| * // xxx/yyy/ |
| * new Uri.file(r"xxx\yyy\", windows: true); |
| * |
| * file:///xxx/yyy |
| * new Uri.file(r"\xxx\yyy", windows: true); |
| * |
| * file:///xxx/yyy/ |
| * new Uri.file(r"\xxx\yyy/", windows: true); |
| * |
| * // file:///C:/xxx/yyy |
| * new Uri.file(r"C:\xxx\yyy", windows: true); |
| * |
| * // This throws an error. A path with a drive letter is not absolute. |
| * new Uri.file(r"C:", windows: true); |
| * |
| * // This throws an error. A path with a drive letter is not absolute. |
| * new Uri.file(r"C:xxx\yyy", windows: true); |
| * |
| * // file://server/share/file |
| * new Uri.file(r"\\server\share\file", windows: true); |
| * ``` |
| * |
| * If the path passed is not a legal file path [ArgumentError] is thrown. |
| */ |
| factory Uri.file(String path, {bool windows}) { |
| windows = (windows == null) ? Uri._isWindows : windows; |
| return windows ? _makeWindowsFileUrl(path, false) |
| : _makeFileUri(path, false); |
| } |
| |
| /** |
| * Like [Uri.file] except that a non-empty URI path ends in a slash. |
| * |
| * If [path] is not empty, and it doesn't end in a directory separator, |
| * then a slash is added to the returned URI's path. |
| * In all other cases, the result is the same as returned by `Uri.file`. |
| */ |
| factory Uri.directory(String path, {bool windows}) { |
| windows = (windows == null) ? Uri._isWindows : windows; |
| return windows ? _makeWindowsFileUrl(path, true) |
| : _makeFileUri(path, true); |
| } |
| |
| /** |
| * Returns the natural base URI for the current platform. |
| * |
| * When running in a browser this is the current URL (from |
| * `window.location.href`). |
| * |
| * When not running in a browser this is the file URI referencing |
| * the current working directory. |
| */ |
| external static Uri get base; |
| |
| external static bool get _isWindows; |
| |
| static _checkNonWindowsPathReservedCharacters(List<String> segments, |
| bool argumentError) { |
| segments.forEach((segment) { |
| if (segment.contains("/")) { |
| if (argumentError) { |
| throw new ArgumentError("Illegal path character $segment"); |
| } else { |
| throw new UnsupportedError("Illegal path character $segment"); |
| } |
| } |
| }); |
| } |
| |
| static _checkWindowsPathReservedCharacters(List<String> segments, |
| bool argumentError, |
| [int firstSegment = 0]) { |
| for (var segment in segments.skip(firstSegment)) { |
| if (segment.contains(new RegExp(r'["*/:<>?\\|]'))) { |
| if (argumentError) { |
| throw new ArgumentError("Illegal character in path"); |
| } else { |
| throw new UnsupportedError("Illegal character in path"); |
| } |
| } |
| } |
| } |
| |
| static _checkWindowsDriveLetter(int charCode, bool argumentError) { |
| if ((_UPPER_CASE_A <= charCode && charCode <= _UPPER_CASE_Z) || |
| (_LOWER_CASE_A <= charCode && charCode <= _LOWER_CASE_Z)) { |
| return; |
| } |
| if (argumentError) { |
| throw new ArgumentError("Illegal drive letter " + |
| new String.fromCharCode(charCode)); |
| } else { |
| throw new UnsupportedError("Illegal drive letter " + |
| new String.fromCharCode(charCode)); |
| } |
| } |
| |
| static _makeFileUri(String path, bool slashTerminated) { |
| const String sep = "/"; |
| var segments = path.split(sep); |
| if (slashTerminated && |
| segments.isNotEmpty && |
| segments.last.isNotEmpty) { |
| segments.add(""); // Extra separator at end. |
| } |
| if (path.startsWith(sep)) { |
| // Absolute file:// URI. |
| return new Uri(scheme: "file", pathSegments: segments); |
| } else { |
| // Relative URI. |
| return new Uri(pathSegments: segments); |
| } |
| } |
| |
| static _makeWindowsFileUrl(String path, bool slashTerminated) { |
| if (path.startsWith(r"\\?\")) { |
| if (path.startsWith(r"UNC\", 4)) { |
| path = path.replaceRange(0, 7, r'\'); |
| } else { |
| path = path.substring(4); |
| if (path.length < 3 || |
| path.codeUnitAt(1) != _COLON || |
| path.codeUnitAt(2) != _BACKSLASH) { |
| throw new ArgumentError( |
| r"Windows paths with \\?\ prefix must be absolute"); |
| } |
| } |
| } else { |
| path = path.replaceAll("/", r'\'); |
| } |
| const String sep = r'\'; |
| if (path.length > 1 && path.codeUnitAt(1) == _COLON) { |
| _checkWindowsDriveLetter(path.codeUnitAt(0), true); |
| if (path.length == 2 || path.codeUnitAt(2) != _BACKSLASH) { |
| throw new ArgumentError( |
| "Windows paths with drive letter must be absolute"); |
| } |
| // Absolute file://C:/ URI. |
| var pathSegments = path.split(sep); |
| if (slashTerminated && |
| pathSegments.last.isNotEmpty) { |
| pathSegments.add(""); // Extra separator at end. |
| } |
| _checkWindowsPathReservedCharacters(pathSegments, true, 1); |
| return new Uri(scheme: "file", pathSegments: pathSegments); |
| } |
| |
| if (path.startsWith(sep)) { |
| if (path.startsWith(sep, 1)) { |
| // Absolute file:// URI with host. |
| int pathStart = path.indexOf(r'\', 2); |
| String hostPart = |
| (pathStart < 0) ? path.substring(2) : path.substring(2, pathStart); |
| String pathPart = |
| (pathStart < 0) ? "" : path.substring(pathStart + 1); |
| var pathSegments = pathPart.split(sep); |
| _checkWindowsPathReservedCharacters(pathSegments, true); |
| if (slashTerminated && |
| pathSegments.last.isNotEmpty) { |
| pathSegments.add(""); // Extra separator at end. |
| } |
| return new Uri( |
| scheme: "file", host: hostPart, pathSegments: pathSegments); |
| } else { |
| // Absolute file:// URI. |
| var pathSegments = path.split(sep); |
| if (slashTerminated && |
| pathSegments.last.isNotEmpty) { |
| pathSegments.add(""); // Extra separator at end. |
| } |
| _checkWindowsPathReservedCharacters(pathSegments, true); |
| return new Uri(scheme: "file", pathSegments: pathSegments); |
| } |
| } else { |
| // Relative URI. |
| var pathSegments = path.split(sep); |
| _checkWindowsPathReservedCharacters(pathSegments, true); |
| if (slashTerminated && |
| pathSegments.isNotEmpty && |
| pathSegments.last.isNotEmpty) { |
| pathSegments.add(""); // Extra separator at end. |
| } |
| return new Uri(pathSegments: pathSegments); |
| } |
| } |
| |
| /** |
| * Returns a new `Uri` based on this one, but with some parts replaced. |
| * |
| * This method takes the same parameters as the [new Uri] constructor, |
| * and they have the same meaning. |
| * |
| * At most one of [path] and [pathSegments] must be provided. |
| * Likewise, at most one of [query] and [queryParameters] must be provided. |
| * |
| * Each part that is not provided will default to the corresponding |
| * value from this `Uri` instead. |
| * |
| * This method is different from [Uri.resolve] which overrides in a |
| * hierarchial manner, |
| * and can instead replace each part of a `Uri` individually. |
| * |
| * Example: |
| * |
| * Uri uri1 = Uri.parse("a://b@c:4/d/e?f#g"); |
| * Uri uri2 = uri1.replace(scheme: "A", path: "D/E/E", fragment: "G"); |
| * print(uri2); // prints "A://b@c:4/D/E/E/?f#G" |
| * |
| * This method acts similarly to using the `new Uri` constructor with |
| * some of the arguments taken from this `Uri` . Example: |
| * |
| * Uri uri3 = new Uri( |
| * scheme: "A", |
| * userInfo: uri1.userInfo, |
| * host: uri1.host, |
| * port: uri1.port, |
| * path: "D/E/E", |
| * query: uri1.query, |
| * fragment: "G"); |
| * print(uri3); // prints "A://b@c:4/D/E/E/?f#G" |
| * print(uri2 == uri3); // prints true. |
| * |
| * Using this method can be seen as a shorthand for the `Uri` constructor |
| * call above, but may also be slightly faster because the parts taken |
| * from this `Uri` need not be checked for validity again. |
| */ |
| Uri replace({String scheme, |
| String userInfo, |
| String host, |
| int port, |
| String path, |
| Iterable<String> pathSegments, |
| String query, |
| Map<String, String> queryParameters, |
| String fragment}) { |
| // Set to true if the scheme has (potentially) changed. |
| // In that case, the default port may also have changed and we need |
| // to check even the existing port. |
| bool schemeChanged = false; |
| if (scheme != null) { |
| scheme = _makeScheme(scheme, 0, scheme.length); |
| schemeChanged = true; |
| } else { |
| scheme = this.scheme; |
| } |
| bool isFile = (scheme == "file"); |
| if (userInfo != null) { |
| userInfo = _makeUserInfo(userInfo, 0, userInfo.length); |
| } else { |
| userInfo = this._userInfo; |
| } |
| if (port != null) { |
| port = _makePort(port, scheme); |
| } else { |
| port = this._port; |
| if (schemeChanged) { |
| // The default port might have changed. |
| port = _makePort(port, scheme); |
| } |
| } |
| if (host != null) { |
| host = _makeHost(host, 0, host.length, false); |
| } else if (this.hasAuthority) { |
| host = this._host; |
| } else if (userInfo.isNotEmpty || port != null || isFile) { |
| host = ""; |
| } |
| |
| bool hasAuthority = host != null; |
| if (path != null || pathSegments != null) { |
| path = _makePath(path, 0, _stringOrNullLength(path), pathSegments, |
| scheme, hasAuthority); |
| } else { |
| path = this._path; |
| if ((isFile || (hasAuthority && !path.isEmpty)) && |
| !path.startsWith('/')) { |
| path = "/" + path; |
| } |
| } |
| |
| if (query != null || queryParameters != null) { |
| query = _makeQuery(query, 0, _stringOrNullLength(query), queryParameters); |
| } else { |
| query = this._query; |
| } |
| |
| if (fragment != null) { |
| fragment = _makeFragment(fragment, 0, fragment.length); |
| } else { |
| fragment = this._fragment; |
| } |
| |
| return new Uri._internal( |
| scheme, userInfo, host, port, path, query, fragment); |
| } |
| |
| /** |
| * Returns a `Uri` that differs from this only in not having a fragment. |
| * |
| * If this `Uri` does not have a fragment, it is itself returned. |
| */ |
| Uri removeFragment() { |
| if (!this.hasFragment) return this; |
| return new Uri._internal(scheme, _userInfo, _host, _port, |
| _path, _query, null); |
| } |
| |
| /** |
| * 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 section 17.13.4] |
| * (http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.13.4 |
| * "HTML 4.01 section 17.13.4"). Each key and value in the returned map |
| * has been decoded. If there is no query the empty map is returned. |
| * |
| * Keys in the query string that have no value are mapped to the |
| * empty string. |
| * |
| * The returned map is unmodifiable and will throw [UnsupportedError] on any |
| * calls that would mutate it. |
| */ |
| Map<String, String> get queryParameters { |
| if (_queryParameters == null) { |
| _queryParameters = new UnmodifiableMapView(splitQueryString(query)); |
| } |
| return _queryParameters; |
| } |
| |
| /** |
| * Returns a URI where the path has been normalized. |
| * |
| * A normalized path does not contain `.` segments or non-leading `..` |
| * segments. |
| * Only a relative path with no scheme or authority may contain |
| * leading `..` segments, |
| * a path that starts with `/` will also drop any leading `..` segments. |
| * |
| * This uses the same normalization strategy as `new Uri().resolve(this)`. |
| * |
| * Does not change any part of the URI except the path. |
| * |
| * The default implementation of `Uri` always normalizes paths, so calling |
| * this function has no effect. |
| */ |
| Uri normalizePath() { |
| String path = _normalizePath(_path, scheme, hasAuthority); |
| if (identical(path, _path)) return this; |
| return this.replace(path: path); |
| } |
| |
| static int _makePort(int port, String scheme) { |
| // Perform scheme specific normalization. |
| if (port != null && port == _defaultPort(scheme)) return null; |
| return port; |
| } |
| |
| /** |
| * Check and normalize a host name. |
| * |
| * If the host name starts and ends with '[' and ']', it is considered an |
| * IPv6 address. If [strictIPv6] is false, the address is also considered |
| * an IPv6 address if it contains any ':' character. |
| * |
| * If it is not an IPv6 address, it is case- and escape-normalized. |
| * This escapes all characters not valid in a reg-name, |
| * and converts all non-escape upper-case letters to lower-case. |
| */ |
| static String _makeHost(String host, int start, int end, bool strictIPv6) { |
| // TODO(lrn): Should we normalize IPv6 addresses according to RFC 5952? |
| if (host == null) return null; |
| if (start == end) return ""; |
| // Host is an IPv6 address if it starts with '[' or contains a colon. |
| if (host.codeUnitAt(start) == _LEFT_BRACKET) { |
| if (host.codeUnitAt(end - 1) != _RIGHT_BRACKET) { |
| _fail(host, start, 'Missing end `]` to match `[` in host'); |
| } |
| parseIPv6Address(host, start + 1, end - 1); |
| // RFC 5952 requires hex digits to be lower case. |
| return host.substring(start, end).toLowerCase(); |
| } |
| if (!strictIPv6) { |
| // TODO(lrn): skip if too short to be a valid IPv6 address? |
| for (int i = start; i < end; i++) { |
| if (host.codeUnitAt(i) == _COLON) { |
| parseIPv6Address(host, start, end); |
| return '[$host]'; |
| } |
| } |
| } |
| return _normalizeRegName(host, start, end); |
| } |
| |
| static bool _isRegNameChar(int char) { |
| return char < 127 && (_regNameTable[char >> 4] & (1 << (char & 0xf))) != 0; |
| } |
| |
| /** |
| * Validates and does case- and percent-encoding normalization. |
| * |
| * The [host] must be an RFC3986 "reg-name". It is converted |
| * to lower case, and percent escapes are converted to either |
| * lower case unreserved characters or upper case escapes. |
| */ |
| static String _normalizeRegName(String host, int start, int end) { |
| StringBuffer buffer; |
| int sectionStart = start; |
| int index = start; |
| // Whether all characters between sectionStart and index are normalized, |
| bool isNormalized = true; |
| |
| while (index < end) { |
| int char = host.codeUnitAt(index); |
| if (char == _PERCENT) { |
| // The _regNameTable contains "%", so we check that first. |
| String replacement = _normalizeEscape(host, index, true); |
| if (replacement == null && isNormalized) { |
| index += 3; |
| continue; |
| } |
| if (buffer == null) buffer = new StringBuffer(); |
| String slice = host.substring(sectionStart, index); |
| if (!isNormalized) slice = slice.toLowerCase(); |
| buffer.write(slice); |
| int sourceLength = 3; |
| if (replacement == null) { |
| replacement = host.substring(index, index + 3); |
| } else if (replacement == "%") { |
| replacement = "%25"; |
| sourceLength = 1; |
| } |
| buffer.write(replacement); |
| index += sourceLength; |
| sectionStart = index; |
| isNormalized = true; |
| } else if (_isRegNameChar(char)) { |
| if (isNormalized && _UPPER_CASE_A <= char && _UPPER_CASE_Z >= char) { |
| // Put initial slice in buffer and continue in non-normalized mode |
| if (buffer == null) buffer = new StringBuffer(); |
| if (sectionStart < index) { |
| buffer.write(host.substring(sectionStart, index)); |
| sectionStart = index; |
| } |
| isNormalized = false; |
| } |
| index++; |
| } else if (_isGeneralDelimiter(char)) { |
| _fail(host, index, "Invalid character"); |
| } else { |
| int sourceLength = 1; |
| if ((char & 0xFC00) == 0xD800 && (index + 1) < end) { |
| int tail = host.codeUnitAt(index + 1); |
| if ((tail & 0xFC00) == 0xDC00) { |
| char = 0x10000 | ((char & 0x3ff) << 10) | (tail & 0x3ff); |
| sourceLength = 2; |
| } |
| } |
| if (buffer == null) buffer = new StringBuffer(); |
| String slice = host.substring(sectionStart, index); |
| if (!isNormalized) slice = slice.toLowerCase(); |
| buffer.write(slice); |
| buffer.write(_escapeChar(char)); |
| index += sourceLength; |
| sectionStart = index; |
| } |
| } |
| if (buffer == null) return host.substring(start, end); |
| if (sectionStart < end) { |
| String slice = host.substring(sectionStart, end); |
| if (!isNormalized) slice = slice.toLowerCase(); |
| buffer.write(slice); |
| } |
| return buffer.toString(); |
| } |
| |
| /** |
| * Validates scheme characters and does case-normalization. |
| * |
| * Schemes are converted to lower case. They cannot contain escapes. |
| */ |
| static String _makeScheme(String scheme, int start, int end) { |
| if (start == end) return ""; |
| final int firstCodeUnit = scheme.codeUnitAt(start); |
| if (!_isAlphabeticCharacter(firstCodeUnit)) { |
| _fail(scheme, start, "Scheme not starting with alphabetic character"); |
| } |
| bool containsUpperCase = false; |
| for (int i = start; i < end; i++) { |
| final int codeUnit = scheme.codeUnitAt(i); |
| if (!_isSchemeCharacter(codeUnit)) { |
| _fail(scheme, i, "Illegal scheme character"); |
| } |
| if (_UPPER_CASE_A <= codeUnit && codeUnit <= _UPPER_CASE_Z) { |
| containsUpperCase = true; |
| } |
| } |
| scheme = scheme.substring(start, end); |
| if (containsUpperCase) scheme = scheme.toLowerCase(); |
| return scheme; |
| } |
| |
| static String _makeUserInfo(String userInfo, int start, int end) { |
| if (userInfo == null) return ""; |
| return _normalize(userInfo, start, end, _userinfoTable); |
| } |
| |
| static String _makePath(String path, int start, int end, |
| Iterable<String> pathSegments, |
| String scheme, |
| bool hasAuthority) { |
| bool isFile = (scheme == "file"); |
| bool ensureLeadingSlash = isFile || hasAuthority; |
| if (path == null && pathSegments == null) return isFile ? "/" : ""; |
| if (path != null && pathSegments != null) { |
| throw new ArgumentError('Both path and pathSegments specified'); |
| } |
| var result; |
| if (path != null) { |
| result = _normalize(path, start, end, _pathCharOrSlashTable); |
| } else { |
| result = pathSegments.map((s) => _uriEncode(_pathCharTable, s)).join("/"); |
| } |
| if (result.isEmpty) { |
| if (isFile) return "/"; |
| } else if (ensureLeadingSlash && !result.startsWith('/')) { |
| result = "/" + result; |
| } |
| result = _normalizePath(result, scheme, hasAuthority); |
| return result; |
| } |
| |
| /// Performs path normalization (remove dot segments) on a path. |
| /// |
| /// If the URI has neither scheme nor authority, it's considered a |
| /// "pure path" and normalization won't remove leading ".." segments. |
| /// Otherwise it follows the RFC 3986 "remove dot segments" algorithm. |
| static String _normalizePath(String path, String scheme, bool hasAuthority) { |
| if (scheme.isEmpty && !hasAuthority && !path.startsWith('/')) { |
| return _normalizeRelativePath(path); |
| } |
| return _removeDotSegments(path); |
| } |
| |
| static String _makeQuery(String query, int start, int end, |
| Map<String, String> queryParameters) { |
| if (query == null && queryParameters == null) return null; |
| if (query != null && queryParameters != null) { |
| throw new ArgumentError('Both query and queryParameters specified'); |
| } |
| if (query != null) return _normalize(query, start, end, _queryCharTable); |
| |
| 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, int start, int end) { |
| if (fragment == null) return null; |
| return _normalize(fragment, start, end, _queryCharTable); |
| } |
| |
| static int _stringOrNullLength(String s) => (s == null) ? 0 : s.length; |
| |
| static bool _isHexDigit(int char) { |
| if (_NINE >= char) return _ZERO <= char; |
| char |= 0x20; |
| return _LOWER_CASE_A <= char && _LOWER_CASE_F >= char; |
| } |
| |
| static int _hexValue(int char) { |
| assert(_isHexDigit(char)); |
| if (_NINE >= char) return char - _ZERO; |
| char |= 0x20; |
| return char - (_LOWER_CASE_A - 10); |
| } |
| |
| /** |
| * Performs RFC 3986 Percent-Encoding Normalization. |
| * |
| * Returns a replacement string that should be replace the original escape. |
| * Returns null if no replacement is necessary because the escape is |
| * not for an unreserved character and is already non-lower-case. |
| * |
| * Returns "%" if the escape is invalid (not two valid hex digits following |
| * the percent sign). The calling code should replace the percent |
| * sign with "%25", but leave the following two characters unmodified. |
| * |
| * If [lowerCase] is true, a single character returned is always lower case, |
| */ |
| static String _normalizeEscape(String source, int index, bool lowerCase) { |
| assert(source.codeUnitAt(index) == _PERCENT); |
| if (index + 2 >= source.length) { |
| return "%"; // Marks the escape as invalid. |
| } |
| int firstDigit = source.codeUnitAt(index + 1); |
| int secondDigit = source.codeUnitAt(index + 2); |
| if (!_isHexDigit(firstDigit) || !_isHexDigit(secondDigit)) { |
| return "%"; // Marks the escape as invalid. |
| } |
| int value = _hexValue(firstDigit) * 16 + _hexValue(secondDigit); |
| if (_isUnreservedChar(value)) { |
| if (lowerCase && _UPPER_CASE_A <= value && _UPPER_CASE_Z >= value) { |
| value |= 0x20; |
| } |
| return new String.fromCharCode(value); |
| } |
| if (firstDigit >= _LOWER_CASE_A || secondDigit >= _LOWER_CASE_A) { |
| // Either digit is lower case. |
| return source.substring(index, index + 3).toUpperCase(); |
| } |
| // Escape is retained, and is already non-lower case, so return null to |
| // represent "no replacement necessary". |
| return null; |
| } |
| |
| static bool _isUnreservedChar(int ch) { |
| return ch < 127 && |
| ((_unreservedTable[ch >> 4] & (1 << (ch & 0x0f))) != 0); |
| } |
| |
| static String _escapeChar(char) { |
| assert(char <= 0x10ffff); // It's a valid unicode code point. |
| const hexDigits = "0123456789ABCDEF"; |
| List codeUnits; |
| if (char < 0x80) { |
| // ASCII, a single percent encoded sequence. |
| codeUnits = new List(3); |
| codeUnits[0] = _PERCENT; |
| codeUnits[1] = hexDigits.codeUnitAt(char >> 4); |
| codeUnits[2] = hexDigits.codeUnitAt(char & 0xf); |
| } else { |
| // Do UTF-8 encoding of character, then percent encode bytes. |
| int flag = 0xc0; // The high-bit markers on the first byte of UTF-8. |
| int encodedBytes = 2; |
| if (char > 0x7ff) { |
| flag = 0xe0; |
| encodedBytes = 3; |
| if (char > 0xffff) { |
| encodedBytes = 4; |
| flag = 0xf0; |
| } |
| } |
| codeUnits = new List(3 * encodedBytes); |
| int index = 0; |
| while (--encodedBytes >= 0) { |
| int byte = ((char >> (6 * encodedBytes)) & 0x3f) | flag; |
| codeUnits[index] = _PERCENT; |
| codeUnits[index + 1] = hexDigits.codeUnitAt(byte >> 4); |
| codeUnits[index + 2] = hexDigits.codeUnitAt(byte & 0xf); |
| index += 3; |
| flag = 0x80; // Following bytes have only high bit set. |
| } |
| } |
| return new String.fromCharCodes(codeUnits); |
| } |
| |
| /** |
| * Runs through component checking that each character is valid and |
| * normalize percent escapes. |
| * |
| * Uses [charTable] to check if a non-`%` character is allowed. |
| * Each `%` character must be followed by two hex digits. |
| * If the hex-digits are lower case letters, they are converted to |
| * upper case. |
| */ |
| static String _normalize(String component, int start, int end, |
| List<int> charTable) { |
| StringBuffer buffer; |
| int sectionStart = start; |
| int index = start; |
| // Loop while characters are valid and escapes correct and upper-case. |
| while (index < end) { |
| int char = component.codeUnitAt(index); |
| if (char < 127 && (charTable[char >> 4] & (1 << (char & 0x0f))) != 0) { |
| index++; |
| } else { |
| String replacement; |
| int sourceLength; |
| if (char == _PERCENT) { |
| replacement = _normalizeEscape(component, index, false); |
| // Returns null if we should keep the existing escape. |
| if (replacement == null) { |
| index += 3; |
| continue; |
| } |
| // Returns "%" if we should escape the existing percent. |
| if ("%" == replacement) { |
| replacement = "%25"; |
| sourceLength = 1; |
| } else { |
| sourceLength = 3; |
| } |
| } else if (_isGeneralDelimiter(char)) { |
| _fail(component, index, "Invalid character"); |
| } else { |
| sourceLength = 1; |
| if ((char & 0xFC00) == 0xD800) { |
| // Possible lead surrogate. |
| if (index + 1 < end) { |
| int tail = component.codeUnitAt(index + 1); |
| if ((tail & 0xFC00) == 0xDC00) { |
| // Tail surrogat. |
| sourceLength = 2; |
| char = 0x10000 | ((char & 0x3ff) << 10) | (tail & 0x3ff); |
| } |
| } |
| } |
| replacement = _escapeChar(char); |
| } |
| if (buffer == null) buffer = new StringBuffer(); |
| buffer.write(component.substring(sectionStart, index)); |
| buffer.write(replacement); |
| index += sourceLength; |
| sectionStart = index; |
| } |
| } |
| if (buffer == null) { |
| // Makes no copy if start == 0 and end == component.length. |
| return component.substring(start, end); |
| } |
| if (sectionStart < end) { |
| buffer.write(component.substring(sectionStart, end)); |
| } |
| return buffer.toString(); |
| } |
| |
| static bool _isSchemeCharacter(int ch) { |
| return ch < 128 && ((_schemeTable[ch >> 4] & (1 << (ch & 0x0f))) != 0); |
| } |
| |
| static bool _isGeneralDelimiter(int ch) { |
| return ch <= _RIGHT_BRACKET && |
| ((_genDelimitersTable[ch >> 4] & (1 << (ch & 0x0f))) != 0); |
| } |
| |
| /** |
| * Returns whether the URI is absolute. |
| */ |
| bool get isAbsolute => scheme != "" && fragment == ""; |
| |
| String _mergePaths(String base, String reference) { |
| // Optimize for the case: absolute base, reference beginning with "../". |
| int backCount = 0; |
| int refStart = 0; |
| // Count number of "../" at beginning of reference. |
| while (reference.startsWith("../", refStart)) { |
| refStart += 3; |
| backCount++; |
| } |
| |
| // Drop last segment - everything after last '/' of base. |
| int baseEnd = base.lastIndexOf('/'); |
| // Drop extra segments for each leading "../" of reference. |
| while (baseEnd > 0 && backCount > 0) { |
| int newEnd = base.lastIndexOf('/', baseEnd - 1); |
| if (newEnd < 0) { |
| break; |
| } |
| int delta = baseEnd - newEnd; |
| // If we see a "." or ".." segment in base, stop here and let |
| // _removeDotSegments handle it. |
| if ((delta == 2 || delta == 3) && |
| base.codeUnitAt(newEnd + 1) == _DOT && |
| (delta == 2 || base.codeUnitAt(newEnd + 2) == _DOT)) { |
| break; |
| } |
| baseEnd = newEnd; |
| backCount--; |
| } |
| return base.replaceRange(baseEnd + 1, null, |
| reference.substring(refStart - 3 * backCount)); |
| } |
| |
| /// Make a guess at whether a path contains a `..` or `.` segment. |
| /// |
| /// This is a primitive test that can cause false positives. |
| /// It's only used to avoid a more expensive operation in the case where |
| /// it's not necessary. |
| static bool _mayContainDotSegments(String path) { |
| if (path.startsWith('.')) return true; |
| int index = path.indexOf("/."); |
| return index != -1; |
| } |
| |
| /// Removes '.' and '..' segments from a path. |
| /// |
| /// Follows the RFC 2986 "remove dot segments" algorithm. |
| /// This algorithm is only used on paths of URIs with a scheme, |
| /// and it treats the path as if it is absolute (leading '..' are removed). |
| static String _removeDotSegments(String path) { |
| if (!_mayContainDotSegments(path)) return path; |
| assert(path.isNotEmpty); // An empty path would not have dot segments. |
| List<String> output = []; |
| bool appendSlash = false; |
| for (String segment in path.split("/")) { |
| appendSlash = false; |
| if (segment == "..") { |
| if (output.isNotEmpty) { |
| output.removeLast(); |
| if (output.isEmpty) { |
| output.add(""); |
| } |
| } |
| appendSlash = true; |
| } else if ("." == segment) { |
| appendSlash = true; |
| } else { |
| output.add(segment); |
| } |
| } |
| if (appendSlash) output.add(""); |
| return output.join("/"); |
| } |
| |
| /// Removes all `.` segments and any non-leading `..` segments. |
| /// |
| /// Removing the ".." from a "bar/foo/.." sequence results in "bar/" |
| /// (trailing "/"). If the entire path is removed (because it contains as |
| /// many ".." segments as real segments), the result is "./". |
| /// This is different from an empty string, which represents "no path", |
| /// when you resolve it against a base URI with a path with a non-empty |
| /// final segment. |
| static String _normalizeRelativePath(String path) { |
| assert(!path.startsWith('/')); // Only get called for relative paths. |
| if (!_mayContainDotSegments(path)) return path; |
| assert(path.isNotEmpty); // An empty path would not have dot segments. |
| List<String> output = []; |
| bool appendSlash = false; |
| for (String segment in path.split("/")) { |
| appendSlash = false; |
| if (".." == segment) { |
| if (!output.isEmpty && output.last != "..") { |
| output.removeLast(); |
| appendSlash = true; |
| } else { |
| output.add(".."); |
| } |
| } else if ("." == segment) { |
| appendSlash = true; |
| } else { |
| output.add(segment); |
| } |
| } |
| if (output.isEmpty || (output.length == 1 && output[0].isEmpty)) { |
| return "./"; |
| } |
| if (appendSlash || output.last == '..') output.add(""); |
| return output.join("/"); |
| } |
| |
| /** |
| * Resolve [reference] as an URI relative to `this`. |
| * |
| * First turn [reference] into a URI using [Uri.parse]. Then resolve the |
| * resulting URI relative to `this`. |
| * |
| * Returns the resolved URI. |
| * |
| * See [resolveUri] for details. |
| */ |
| Uri resolve(String reference) { |
| return resolveUri(Uri.parse(reference)); |
| } |
| |
| /** |
| * Resolve [reference] as an URI relative to `this`. |
| * |
| * Returns the resolved URI. |
| * |
| * The algorithm "Transform Reference" for resolving a reference is |
| * described in [RFC-3986 Section 5] |
| * (http://tools.ietf.org/html/rfc3986#section-5 "RFC-1123"). |
| * |
| * Updated to handle the case where the base URI is just a relative path - |
| * that is: when it has no scheme or authority and the path does not start |
| * with a slash. |
| * In that case, the paths are combined without removing leading "..", and |
| * an empty path is not converted to "/". |
| */ |
| Uri resolveUri(Uri reference) { |
| // From RFC 3986. |
| String targetScheme; |
| String targetUserInfo = ""; |
| String targetHost; |
| int targetPort; |
| String targetPath; |
| String targetQuery; |
| if (reference.scheme.isNotEmpty) { |
| targetScheme = reference.scheme; |
| if (reference.hasAuthority) { |
| targetUserInfo = reference.userInfo; |
| targetHost = reference.host; |
| targetPort = reference.hasPort ? reference.port : null; |
| } |
| targetPath = _removeDotSegments(reference.path); |
| if (reference.hasQuery) { |
| targetQuery = reference.query; |
| } |
| } else { |
| targetScheme = this.scheme; |
| if (reference.hasAuthority) { |
| targetUserInfo = reference.userInfo; |
| targetHost = reference.host; |
| targetPort = _makePort(reference.hasPort ? reference.port : null, |
| targetScheme); |
| targetPath = _removeDotSegments(reference.path); |
| if (reference.hasQuery) targetQuery = reference.query; |
| } else { |
| targetUserInfo = this._userInfo; |
| targetHost = this._host; |
| targetPort = this._port; |
| if (reference.path == "") { |
| targetPath = this._path; |
| if (reference.hasQuery) { |
| targetQuery = reference.query; |
| } else { |
| targetQuery = this._query; |
| } |
| } else { |
| if (reference.hasAbsolutePath) { |
| targetPath = _removeDotSegments(reference.path); |
| } else { |
| // This is the RFC 3986 behavior for merging. |
| if (this.hasEmptyPath) { |
| if (!this.hasScheme && !this.hasAuthority) { |
| // Keep the path relative if no scheme or authority. |
| targetPath = reference.path; |
| } else { |
| // Add path normalization on top of RFC algorithm. |
| targetPath = _removeDotSegments("/" + reference.path); |
| } |
| } else { |
| var mergedPath = _mergePaths(this._path, reference.path); |
| if (this.hasScheme || this.hasAuthority || this.hasAbsolutePath) { |
| targetPath = _removeDotSegments(mergedPath); |
| } else { |
| // Non-RFC 3986 beavior. If both base and reference are relative |
| // path, allow the merged path to start with "..". |
| // The RFC only specifies the case where the base has a scheme. |
| targetPath = _normalizeRelativePath(mergedPath); |
| } |
| } |
| } |
| if (reference.hasQuery) targetQuery = reference.query; |
| } |
| } |
| } |
| String fragment = reference.hasFragment ? reference.fragment : null; |
| return new Uri._internal(targetScheme, |
| targetUserInfo, |
| targetHost, |
| targetPort, |
| targetPath, |
| targetQuery, |
| fragment); |
| } |
| |
| /** |
| * Returns whether the URI has a [scheme] component. |
| */ |
| bool get hasScheme => scheme.isNotEmpty; |
| |
| /** |
| * Returns whether the URI has an [authority] component. |
| */ |
| bool get hasAuthority => _host != null; |
| |
| /** |
| * Returns whether the URI has an explicit port. |
| * |
| * If the port number is the default port number |
| * (zero for unrecognized schemes, with http (80) and https (443) being |
| * recognized), |
| * then the port is made implicit and omitted from the URI. |
| */ |
| bool get hasPort => _port != null; |
| |
| /** |
| * Returns whether the URI has a query part. |
| */ |
| bool get hasQuery => _query != null; |
| |
| /** |
| * Returns whether the URI has a fragment part. |
| */ |
| bool get hasFragment => _fragment != null; |
| |
| /** |
| * Returns whether the URI has an empty path. |
| */ |
| bool get hasEmptyPath => _path.isEmpty; |
| |
| /** |
| * Returns whether the URI has an absolute path (starting with '/'). |
| */ |
| bool get hasAbsolutePath => _path.startsWith('/'); |
| |
| /** |
| * 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: $this"); |
| } |
| if (_port == null) return "$scheme://$_host"; |
| return "$scheme://$_host:$_port"; |
| } |
| |
| /** |
| * Returns the file path from a file URI. |
| * |
| * The returned path has either Windows or non-Windows |
| * semantics. |
| * |
| * For non-Windows semantics the slash ("/") is used to separate |
| * path segments. |
| * |
| * For Windows semantics the backslash ("\") separator is used to |
| * separate path segments. |
| * |
| * If the URI is absolute the path starts with a path separator |
| * unless Windows semantics is used and the first path segment is a |
| * drive letter. When Windows semantics is used a host component in |
| * the uri in interpreted as a file server and a UNC path is |
| * returned. |
| * |
| * The default for whether to use Windows or non-Windows semantics |
| * determined from the platform Dart is running on. When running in |
| * the standalone VM this is detected by the VM based on the |
| * operating system. When running in a browser non-Windows semantics |
| * is always used. |
| * |
| * To override the automatic detection of which semantics to use pass |
| * a value for [windows]. Passing `true` will use Windows |
| * semantics and passing `false` will use non-Windows semantics. |
| * |
| * If the URI ends with a slash (i.e. the last path component is |
| * empty) the returned file path will also end with a slash. |
| * |
| * With Windows semantics URIs starting with a drive letter cannot |
| * be relative to the current drive on the designated drive. That is |
| * for the URI `file:///c:abc` calling `toFilePath` will throw as a |
| * path segment cannot contain colon on Windows. |
| * |
| * Examples using non-Windows semantics (resulting of calling |
| * toFilePath in comment): |
| * |
| * Uri.parse("xxx/yyy"); // xxx/yyy |
| * Uri.parse("xxx/yyy/"); // xxx/yyy/ |
| * Uri.parse("file:///xxx/yyy"); // /xxx/yyy |
| * Uri.parse("file:///xxx/yyy/"); // /xxx/yyy/ |
| * Uri.parse("file:///C:"); // /C: |
| * Uri.parse("file:///C:a"); // /C:a |
| * |
| * Examples using Windows semantics (resulting URI in comment): |
| * |
| * Uri.parse("xxx/yyy"); // xxx\yyy |
| * Uri.parse("xxx/yyy/"); // xxx\yyy\ |
| * Uri.parse("file:///xxx/yyy"); // \xxx\yyy |
| * Uri.parse("file:///xxx/yyy/"); // \xxx\yyy/ |
| * Uri.parse("file:///C:/xxx/yyy"); // C:\xxx\yyy |
| * Uri.parse("file:C:xxx/yyy"); // Throws as a path segment |
| * // cannot contain colon on Windows. |
| * Uri.parse("file://server/share/file"); // \\server\share\file |
| * |
| * If the URI is not a file URI calling this throws |
| * [UnsupportedError]. |
| * |
| * If the URI cannot be converted to a file path calling this throws |
| * [UnsupportedError]. |
| */ |
| String toFilePath({bool windows}) { |
| if (scheme != "" && scheme != "file") { |
| throw new UnsupportedError( |
| "Cannot extract a file path from a $scheme URI"); |
| } |
| if (query != "") { |
| throw new UnsupportedError( |
| "Cannot extract a file path from a URI with a query component"); |
| } |
| if (fragment != "") { |
| throw new UnsupportedError( |
| "Cannot extract a file path from a URI with a fragment component"); |
| } |
| if (windows == null) windows = _isWindows; |
| return windows ? _toWindowsFilePath() : _toFilePath(); |
| } |
| |
| String _toFilePath() { |
| if (host != "") { |
| throw new UnsupportedError( |
| "Cannot extract a non-Windows file path from a file URI " |
| "with an authority"); |
| } |
| _checkNonWindowsPathReservedCharacters(pathSegments, false); |
| var result = new StringBuffer(); |
| if (_isPathAbsolute) result.write("/"); |
| result.writeAll(pathSegments, "/"); |
| return result.toString(); |
| } |
| |
| String _toWindowsFilePath() { |
| bool hasDriveLetter = false; |
| var segments = pathSegments; |
| if (segments.length > 0 && |
| segments[0].length == 2 && |
| segments[0].codeUnitAt(1) == _COLON) { |
| _checkWindowsDriveLetter(segments[0].codeUnitAt(0), false); |
| _checkWindowsPathReservedCharacters(segments, false, 1); |
| hasDriveLetter = true; |
| } else { |
| _checkWindowsPathReservedCharacters(segments, false); |
| } |
| var result = new StringBuffer(); |
| if (_isPathAbsolute && !hasDriveLetter) result.write("\\"); |
| if (host != "") { |
| result.write("\\"); |
| result.write(host); |
| result.write("\\"); |
| } |
| result.writeAll(segments, "\\"); |
| if (hasDriveLetter && segments.length == 1) result.write("\\"); |
| return result.toString(); |
| } |
| |
| bool get _isPathAbsolute { |
| if (path == null || path.isEmpty) return false; |
| return path.startsWith('/'); |
| } |
| |
| void _writeAuthority(StringSink ss) { |
| if (_userInfo.isNotEmpty) { |
| ss.write(_userInfo); |
| ss.write("@"); |
| } |
| if (_host != null) ss.write(_host); |
| if (_port != null) { |
| ss.write(":"); |
| ss.write(_port); |
| } |
| } |
| |
| String toString() { |
| StringBuffer sb = new StringBuffer(); |
| _addIfNonEmpty(sb, scheme, scheme, ':'); |
| if (hasAuthority || path.startsWith("//") || (scheme == "file")) { |
| // File URIS always have the authority, even if it is empty. |
| // The empty URI means "localhost". |
| sb.write("//"); |
| _writeAuthority(sb); |
| } |
| sb.write(path); |
| if (_query != null) { sb..write("?")..write(_query); } |
| if (_fragment != null) { sb..write("#")..write(_fragment); } |
| return sb.toString(); |
| } |
| |
| bool operator==(other) { |
| if (other is! Uri) return false; |
| Uri uri = other; |
| return scheme == uri.scheme && |
| hasAuthority == uri.hasAuthority && |
| userInfo == uri.userInfo && |
| host == uri.host && |
| port == uri.port && |
| path == uri.path && |
| hasQuery == uri.hasQuery && |
| query == uri.query && |
| hasFragment == uri.hasFragment && |
| 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. |
| * |
| * Encode the string [component] according to the HTML 4.01 rules |
| * for encoding the posting of a HTML form as a query string |
| * component. |
| |
| * The component is first encoded to bytes using [encoding]. |
| * The default is to use [UTF8] encoding, which preserves all |
| * the characters that don't need encoding. |
| |
| * Then the resulting bytes are "percent-encoded". This transforms |
| * spaces (U+0020) to a plus sign ('+') and all bytes that are not |
| * the ASCII decimal digits, letters or one of '-._~' are written as |
| * a percent sign '%' followed by the two-digit hexadecimal |
| * representation of the byte. |
| |
| * Note that the set of characters which are percent-encoded is a |
| * superset of what HTML 4.01 requires, since 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, |
| {Encoding encoding: UTF8}) { |
| return _uriEncode( |
| _unreservedTable, component, encoding: encoding, 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); |
| } |
| |
| /** |
| * Decodes the percent-encoding in [encodedComponent], converting |
| * pluses to spaces. |
| * |
| * It will create a byte-list of the decoded characters, and then use |
| * [encoding] to decode the byte-list to a String. The default encoding is |
| * UTF-8. |
| */ |
| static String decodeQueryComponent( |
| String encodedComponent, |
| {Encoding encoding: UTF8}) { |
| return _uriDecode(encodedComponent, plusToSpace: true, encoding: encoding); |
| } |
| |
| /** |
| * 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); |
| } |
| |
| /** |
| * Returns the [query] split into a map according to the rules |
| * specified for FORM post in the |
| * [HTML 4.01 specification section 17.13.4] |
| * (http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.13.4 |
| * "HTML 4.01 section 17.13.4"). Each key and value in the returned |
| * map has been decoded. If the [query] |
| * is the empty string an empty map is returned. |
| * |
| * Keys in the query string that have no value are mapped to the |
| * empty string. |
| * |
| * Each query component will be decoded using [encoding]. The default encoding |
| * is UTF-8. |
| */ |
| static Map<String, String> splitQueryString(String query, |
| {Encoding encoding: UTF8}) { |
| return query.split("&").fold({}, (map, element) { |
| int index = element.indexOf("="); |
| if (index == -1) { |
| if (element != "") { |
| map[decodeQueryComponent(element, encoding: encoding)] = ""; |
| } |
| } else if (index != 0) { |
| var key = element.substring(0, index); |
| var value = element.substring(index + 1); |
| map[Uri.decodeQueryComponent(key, encoding: encoding)] = |
| decodeQueryComponent(value, encoding: encoding); |
| } |
| return map; |
| }); |
| } |
| |
| /** |
| * Parse the [host] as an IP version 4 (IPv4) address, returning the address |
| * as a list of 4 bytes in network byte order (big endian). |
| * |
| * Throws a [FormatException] if [host] is not a valid IPv4 address |
| * representation. |
| */ |
| static List<int> parseIPv4Address(String host) { |
| void error(String msg) { |
| throw new FormatException('Illegal IPv4 address, $msg'); |
| } |
| var bytes = host.split('.'); |
| if (bytes.length != 4) { |
| error('IPv4 address should contain exactly 4 parts'); |
| } |
| // TODO(ajohnsen): Consider using Uint8List. |
| return bytes |
| .map((byteString) { |
| int byte = int.parse(byteString); |
| if (byte < 0 || byte > 255) { |
| error('each part must be in the range of `0..255`'); |
| } |
| return byte; |
| }) |
| .toList(); |
| } |
| |
| /** |
| * Parse the [host] as an IP version 6 (IPv6) address, returning the address |
| * as a list of 16 bytes in network byte order (big endian). |
| * |
| * Throws a [FormatException] if [host] is not a valid IPv6 address |
| * representation. |
| * |
| * Acts on the substring from [start] to [end]. If [end] is omitted, it |
| * defaults ot the end of the string. |
| * |
| * Some examples of IPv6 addresses: |
| * * ::1 |
| * * FEDC:BA98:7654:3210:FEDC:BA98:7654:3210 |
| * * 3ffe:2a00:100:7031::1 |
| * * ::FFFF:129.144.52.38 |
| * * 2010:836B:4179::836B:4179 |
| */ |
| static List<int> parseIPv6Address(String host, [int start = 0, int end]) { |
| if (end == null) end = host.length; |
| // An IPv6 address consists of exactly 8 parts of 1-4 hex digits, seperated |
| // by `:`'s, with the following exceptions: |
| // |
| // - One (and only one) wildcard (`::`) may be present, representing a fill |
| // of 0's. The IPv6 `::` is thus 16 bytes of `0`. |
| // - The last two parts may be replaced by an IPv4 address. |
| void error(String msg, [position]) { |
| throw new FormatException('Illegal IPv6 address, $msg', host, position); |
| } |
| int parseHex(int start, int end) { |
| if (end - start > 4) { |
| error('an IPv6 part can only contain a maximum of 4 hex digits', start); |
| } |
| int value = int.parse(host.substring(start, end), radix: 16); |
| if (value < 0 || value > (1 << 16) - 1) { |
| error('each part must be in the range of `0x0..0xFFFF`', start); |
| } |
| return value; |
| } |
| if (host.length < 2) error('address is too short'); |
| List<int> parts = []; |
| bool wildcardSeen = false; |
| int partStart = start; |
| // Parse all parts, except a potential last one. |
| for (int i = start; i < end; i++) { |
| if (host.codeUnitAt(i) == _COLON) { |
| if (i == start) { |
| // If we see a `:` in the beginning, expect wildcard. |
| i++; |
| if (host.codeUnitAt(i) != _COLON) { |
| error('invalid start colon.', i); |
| } |
| partStart = i; |
| } |
| if (i == partStart) { |
| // Wildcard. We only allow one. |
| if (wildcardSeen) { |
| error('only one wildcard `::` is allowed', i); |
| } |
| wildcardSeen = true; |
| parts.add(-1); |
| } else { |
| // Found a single colon. Parse [partStart..i] as a hex entry. |
| parts.add(parseHex(partStart, i)); |
| } |
| partStart = i + 1; |
| } |
| } |
| if (parts.length == 0) error('too few parts'); |
| bool atEnd = (partStart == end); |
| bool isLastWildcard = (parts.last == -1); |
| if (atEnd && !isLastWildcard) { |
| error('expected a part after last `:`', end); |
| } |
| if (!atEnd) { |
| try { |
| parts.add(parseHex(partStart, end)); |
| } catch (e) { |
| // Failed to parse the last chunk as hex. Try IPv4. |
| try { |
| List<int> last = parseIPv4Address(host.substring(partStart, end)); |
| parts.add(last[0] << 8 | last[1]); |
| parts.add(last[2] << 8 | last[3]); |
| } catch (e) { |
| error('invalid end of IPv6 address.', partStart); |
| } |
| } |
| } |
| if (wildcardSeen) { |
| if (parts.length > 7) { |
| error('an address with a wildcard must have less than 7 parts'); |
| } |
| } else if (parts.length != 8) { |
| error('an address without a wildcard must contain exactly 8 parts'); |
| } |
| // TODO(ajohnsen): Consider using Uint8List. |
| List bytes = new List<int>(16); |
| for (int i = 0, index = 0; i < parts.length; i++) { |
| int value = parts[i]; |
| if (value == -1) { |
| int wildCardLength = 9 - parts.length; |
| for (int j = 0; j < wildCardLength; j++) { |
| bytes[index] = 0; |
| bytes[index + 1] = 0; |
| index += 2; |
| } |
| } else { |
| bytes[index] = value >> 8; |
| bytes[index + 1] = value & 0xff; |
| index += 2; |
| } |
| } |
| return bytes; |
| } |
| |
| // Frequently used character codes. |
| static const int _SPACE = 0x20; |
| static const int _DOUBLE_QUOTE = 0x22; |
| static const int _NUMBER_SIGN = 0x23; |
| static const int _PERCENT = 0x25; |
| static const int _ASTERISK = 0x2A; |
| static const int _PLUS = 0x2B; |
| static const int _DOT = 0x2E; |
| static const int _SLASH = 0x2F; |
| static const int _ZERO = 0x30; |
| static const int _NINE = 0x39; |
| static const int _COLON = 0x3A; |
| static const int _LESS = 0x3C; |
| static const int _GREATER = 0x3E; |
| static const int _QUESTION = 0x3F; |
| static const int _AT_SIGN = 0x40; |
| static const int _UPPER_CASE_A = 0x41; |
| static const int _UPPER_CASE_F = 0x46; |
| static const int _UPPER_CASE_Z = 0x5A; |
| static const int _LEFT_BRACKET = 0x5B; |
| static const int _BACKSLASH = 0x5C; |
| static const int _RIGHT_BRACKET = 0x5D; |
| static const int _LOWER_CASE_A = 0x61; |
| static const int _LOWER_CASE_F = 0x66; |
| static const int _LOWER_CASE_Z = 0x7A; |
| static const int _BAR = 0x7C; |
| |
| /** |
| * 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, |
| {Encoding encoding: UTF8, |
| bool spaceToPlus: false}) { |
| byteToHex(byte, buffer) { |
| const String hex = '0123456789ABCDEF'; |
| buffer.writeCharCode(hex.codeUnitAt(byte >> 4)); |
| buffer.writeCharCode(hex.codeUnitAt(byte & 0x0f)); |
| } |
| |
| // Encode the string into bytes then generate an ASCII only string |
| // by percent encoding selected bytes. |
| StringBuffer result = new StringBuffer(); |
| var bytes = encoding.encode(text); |
| for (int i = 0; i < bytes.length; i++) { |
| int byte = bytes[i]; |
| if (byte < 128 && |
| ((canonicalTable[byte >> 4] & (1 << (byte & 0x0f))) != 0)) { |
| result.writeCharCode(byte); |
| } else if (spaceToPlus && byte == _SPACE) { |
| result.writeCharCode(_PLUS); |
| } else { |
| result.writeCharCode(_PERCENT); |
| byteToHex(byte, result); |
| } |
| } |
| 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; |
| } |
| |
| /** |
| * Uri-decode a percent-encoded string. |
| * |
| * It unescapes the string [text] and returns the unescaped string. |
| * |
| * This function is similar to the JavaScript-function `decodeURI`. |
| * |
| * If [plusToSpace] is `true`, plus characters will be converted to spaces. |
| * |
| * The decoder will create a byte-list of the percent-encoded parts, and then |
| * decode the byte-list using [encoding]. The default encodingis UTF-8. |
| */ |
| static String _uriDecode(String text, |
| {bool plusToSpace: false, |
| Encoding encoding: UTF8}) { |
| // First check whether there is any characters which need special handling. |
| bool simple = true; |
| for (int i = 0; i < text.length && simple; i++) { |
| var codeUnit = text.codeUnitAt(i); |
| simple = codeUnit != _PERCENT && codeUnit != _PLUS; |
| } |
| List<int> bytes; |
| if (simple) { |
| if (encoding == UTF8 || encoding == LATIN1) { |
| return text; |
| } else { |
| bytes = text.codeUnits; |
| } |
| } else { |
| bytes = new List(); |
| for (int i = 0; i < text.length; i++) { |
| var codeUnit = text.codeUnitAt(i); |
| if (codeUnit > 127) { |
| throw new ArgumentError("Illegal percent encoding in URI"); |
| } |
| if (codeUnit == _PERCENT) { |
| if (i + 3 > text.length) { |
| throw new ArgumentError('Truncated URI'); |
| } |
| bytes.add(_hexCharPairToByte(text, i + 1)); |
| i += 2; |
| } else if (plusToSpace && codeUnit == _PLUS) { |
| bytes.add(_SPACE); |
| } else { |
| bytes.add(codeUnit); |
| } |
| } |
| } |
| return encoding.decode(bytes); |
| } |
| |
| static bool _isAlphabeticCharacter(int codeUnit) |
| => (codeUnit >= _LOWER_CASE_A && codeUnit <= _LOWER_CASE_Z) || |
| (codeUnit >= _UPPER_CASE_A && codeUnit <= _UPPER_CASE_Z); |
| |
| // 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 |
| // ! #$ &'()*+,-./ |
| 0xffda, // 0x20 - 0x2f 0101101111111111 |
| // 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 |
| |
| // General delimiter characters, RFC 3986 section 2.2. |
| // gen-delims = ":" / "/" / "?" / "#" / "[" / "]" / "@" |
| // |
| static const _genDelimitersTable = const [ |
| // LSB MSB |
| // | | |
| 0x0000, // 0x00 - 0x0f 0000000000000000 |
| 0x0000, // 0x10 - 0x1f 0000000000000000 |
| // # / |
| 0x8008, // 0x20 - 0x2f 0001000000000001 |
| // : ? |
| 0x8400, // 0x30 - 0x3f 0000000000100001 |
| // @ |
| 0x0001, // 0x40 - 0x4f 1000000000000000 |
| // [ ] |
| 0x2800, // 0x50 - 0x5f 0000000000010100 |
| // |
| 0x0000, // 0x60 - 0x6f 0000000000000000 |
| // |
| 0x0000]; // 0x70 - 0x7f 0000000000000000 |
| |
| // Characters allowed in the userinfo as of RFC 3986. |
| // RFC 3986 Apendix A |
| // userinfo = *( unreserved / pct-encoded / sub-delims / ':') |
| static const _userinfoTable = const [ |
| // LSB MSB |
| // | | |
| 0x0000, // 0x00 - 0x0f 0000000000000000 |
| 0x0000, // 0x10 - 0x1f 0000000000000000 |
| // ! $ &'()*+,-. |
| 0x7fd2, // 0x20 - 0x2f 0100101111111110 |
| // 0123456789:; = |
| 0x2fff, // 0x30 - 0x3f 1111111111110100 |
| // ABCDEFGHIJKLMNO |
| 0xfffe, // 0x40 - 0x4f 0111111111111111 |
| // PQRSTUVWXYZ _ |
| 0x87ff, // 0x50 - 0x5f 1111111111100001 |
| // abcdefghijklmno |
| 0xfffe, // 0x60 - 0x6f 0111111111111111 |
| // pqrstuvwxyz ~ |
| 0x47ff]; // 0x70 - 0x7f 1111111111100010 |
| |
| // Characters allowed in the reg-name as of RFC 3986. |
| // RFC 3986 Apendix A |
| // reg-name = *( unreserved / pct-encoded / sub-delims ) |
| static const _regNameTable = const [ |
| // LSB MSB |
| // | | |
| 0x0000, // 0x00 - 0x0f 0000000000000000 |
| 0x0000, // 0x10 - 0x1f 0000000000000000 |
| // ! $%&'()*+,-. |
| 0x7ff2, // 0x20 - 0x2f 0100111111111110 |
| // 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 path as of RFC 3986. |
| // RFC 3986 section 3.3 *and* slash. |
| static const _pathCharOrSlashTable = const [ |
| // LSB MSB |
| // | | |
| 0x0000, // 0x00 - 0x0f 0000000000000000 |
| 0x0000, // 0x10 - 0x1f 0000000000000000 |
| // ! $ &'()*+,-./ |
| 0xffd2, // 0x20 - 0x2f 0100101111111111 |
| // 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 |
| } |