J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000-2001 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package com.sun.jndi.toolkit.url; |
| 27 | |
| 28 | |
| 29 | import java.net.MalformedURLException; |
| 30 | |
| 31 | |
| 32 | /** |
| 33 | * A Uri object represents an absolute Uniform Resource Identifier |
| 34 | * (URI) as defined by RFC 2396 and updated by RFC 2373 and RFC 2732. |
| 35 | * The most commonly used form of URI is the Uniform Resource Locator (URL). |
| 36 | * |
| 37 | * <p> The java.net.URL class cannot be used to parse URIs since it |
| 38 | * requires the installation of URL stream handlers that may not be |
| 39 | * available. The hack of getting around this by temporarily |
| 40 | * replacing the scheme part of a URI is not appropriate here: JNDI |
| 41 | * service providers must work on older Java platforms, and we want |
| 42 | * new features and bug fixes that are not available in old versions |
| 43 | * of the URL class. |
| 44 | * |
| 45 | * <p> It may be appropriate to drop this code in favor of the |
| 46 | * java.net.URI class. The changes would need to be written so as to |
| 47 | * still run on pre-1.4 platforms not containing that class. |
| 48 | * |
| 49 | * <p> The format of an absolute URI (see the RFCs mentioned above) is: |
| 50 | * <p><blockquote><pre> |
| 51 | * absoluteURI = scheme ":" ( hier_part | opaque_part ) |
| 52 | * |
| 53 | * scheme = alpha *( alpha | digit | "+" | "-" | "." ) |
| 54 | * |
| 55 | * hier_part = ( net_path | abs_path ) [ "?" query ] |
| 56 | * opaque_part = uric_no_slash *uric |
| 57 | * |
| 58 | * net_path = "//" authority [ abs_path ] |
| 59 | * abs_path = "/" path_segments |
| 60 | * |
| 61 | * authority = server | reg_name |
| 62 | * reg_name = 1*( unreserved | escaped | "$" | "," | |
| 63 | * ";" | ":" | "@" | "&" | "=" | "+" ) |
| 64 | * server = [ [ userinfo "@" ] hostport ] |
| 65 | * userinfo = *( unreserved | escaped | |
| 66 | * ";" | ":" | "&" | "=" | "+" | "$" | "," ) |
| 67 | * |
| 68 | * hostport = host [ ":" port ] |
| 69 | * host = hostname | IPv4address | IPv6reference |
| 70 | * port = *digit |
| 71 | * |
| 72 | * IPv6reference = "[" IPv6address "]" |
| 73 | * IPv6address = hexpart [ ":" IPv4address ] |
| 74 | * IPv4address = 1*3digit "." 1*3digit "." 1*3digit "." 1*3digit |
| 75 | * hexpart = hexseq | hexseq "::" [ hexseq ] | "::" [ hexseq ] |
| 76 | * hexseq = hex4 *( ":" hex4) |
| 77 | * hex4 = 1*4hex |
| 78 | * |
| 79 | * path = [ abs_path | opaque_part ] |
| 80 | * path_segments = segment *( "/" segment ) |
| 81 | * segment = *pchar *( ";" param ) |
| 82 | * param = *pchar |
| 83 | * pchar = unreserved | escaped | |
| 84 | * ":" | "@" | "&" | "=" | "+" | "$" | "," |
| 85 | * |
| 86 | * query = *uric |
| 87 | * |
| 88 | * uric = reserved | unreserved | escaped |
| 89 | * uric_no_slash = unreserved | escaped | ";" | "?" | ":" | "@" | |
| 90 | * "&" | "=" | "+" | "$" | "," |
| 91 | * reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" | |
| 92 | * "$" | "," | "[" | "]" |
| 93 | * unreserved = alphanum | mark |
| 94 | * mark = "-" | "_" | "." | "!" | "~" | "*" | "'" | "(" | ")" |
| 95 | * escaped = "%" hex hex |
| 96 | * unwise = "{" | "}" | "|" | "\" | "^" | "`" |
| 97 | * </pre></blockquote> |
| 98 | * |
| 99 | * <p> Currently URIs containing <tt>userinfo</tt> or <tt>reg_name</tt> |
| 100 | * are not supported. |
| 101 | * The <tt>opaque_part</tt> of a non-hierarchical URI is treated as if |
| 102 | * if were a <tt>path</tt> without a leading slash. |
| 103 | */ |
| 104 | |
| 105 | |
| 106 | public class Uri { |
| 107 | |
| 108 | protected String uri; |
| 109 | protected String scheme; |
| 110 | protected String host = null; |
| 111 | protected int port = -1; |
| 112 | protected boolean hasAuthority; |
| 113 | protected String path; |
| 114 | protected String query = null; |
| 115 | |
| 116 | |
| 117 | /** |
| 118 | * Creates a Uri object given a URI string. |
| 119 | */ |
| 120 | public Uri(String uri) throws MalformedURLException { |
| 121 | init(uri); |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Creates an uninitialized Uri object. The init() method must |
| 126 | * be called before any other Uri methods. |
| 127 | */ |
| 128 | protected Uri() { |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Initializes a Uri object given a URI string. |
| 133 | * This method must be called exactly once, and before any other Uri |
| 134 | * methods. |
| 135 | */ |
| 136 | protected void init(String uri) throws MalformedURLException { |
| 137 | this.uri = uri; |
| 138 | parse(uri); |
| 139 | } |
| 140 | |
| 141 | /** |
| 142 | * Returns the URI's scheme. |
| 143 | */ |
| 144 | public String getScheme() { |
| 145 | return scheme; |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Returns the host from the URI's authority part, or null |
| 150 | * if no host is provided. If the host is an IPv6 literal, the |
| 151 | * delimiting brackets are part of the returned value (see |
| 152 | * {@link java.net.URI#getHost}). |
| 153 | */ |
| 154 | public String getHost() { |
| 155 | return host; |
| 156 | } |
| 157 | |
| 158 | /** |
| 159 | * Returns the port from the URI's authority part, or -1 if |
| 160 | * no port is provided. |
| 161 | */ |
| 162 | public int getPort() { |
| 163 | return port; |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * Returns the URI's path. The path is never null. Note that a |
| 168 | * slash following the authority part (or the scheme if there is |
| 169 | * no authority part) is part of the path. For example, the path |
| 170 | * of "http://host/a/b" is "/a/b". |
| 171 | */ |
| 172 | public String getPath() { |
| 173 | return path; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Returns the URI's query part, or null if no query is provided. |
| 178 | * Note that a query always begins with a leading "?". |
| 179 | */ |
| 180 | public String getQuery() { |
| 181 | return query; |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * Returns the URI as a string. |
| 186 | */ |
| 187 | public String toString() { |
| 188 | return uri; |
| 189 | } |
| 190 | |
| 191 | /* |
| 192 | * Parses a URI string and sets this object's fields accordingly. |
| 193 | */ |
| 194 | private void parse(String uri) throws MalformedURLException { |
| 195 | int i; // index into URI |
| 196 | |
| 197 | i = uri.indexOf(':'); // parse scheme |
| 198 | if (i < 0) { |
| 199 | throw new MalformedURLException("Invalid URI: " + uri); |
| 200 | } |
| 201 | scheme = uri.substring(0, i); |
| 202 | i++; // skip past ":" |
| 203 | |
| 204 | hasAuthority = uri.startsWith("//", i); |
| 205 | if (hasAuthority) { // parse "//host:port" |
| 206 | i += 2; // skip past "//" |
| 207 | int slash = uri.indexOf('/', i); |
| 208 | if (slash < 0) { |
| 209 | slash = uri.length(); |
| 210 | } |
| 211 | if (uri.startsWith("[", i)) { // at IPv6 literal |
| 212 | int brac = uri.indexOf(']', i + 1); |
| 213 | if (brac < 0 || brac > slash) { |
| 214 | throw new MalformedURLException("Invalid URI: " + uri); |
| 215 | } |
| 216 | host = uri.substring(i, brac + 1); // include brackets |
| 217 | i = brac + 1; // skip past "[...]" |
| 218 | } else { // at host name or IPv4 |
| 219 | int colon = uri.indexOf(':', i); |
| 220 | int hostEnd = (colon < 0 || colon > slash) |
| 221 | ? slash |
| 222 | : colon; |
| 223 | if (i < hostEnd) { |
| 224 | host = uri.substring(i, hostEnd); |
| 225 | } |
| 226 | i = hostEnd; // skip past host |
| 227 | } |
| 228 | |
| 229 | if ((i + 1 < slash) && |
| 230 | uri.startsWith(":", i)) { // parse port |
| 231 | i++; // skip past ":" |
| 232 | port = Integer.parseInt(uri.substring(i, slash)); |
| 233 | } |
| 234 | i = slash; // skip to path |
| 235 | } |
| 236 | int qmark = uri.indexOf('?', i); // look for query |
| 237 | if (qmark < 0) { |
| 238 | path = uri.substring(i); |
| 239 | } else { |
| 240 | path = uri.substring(i, qmark); |
| 241 | query = uri.substring(qmark); |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | /* |
| 246 | // Debug |
| 247 | public static void main(String args[]) throws MalformedURLException { |
| 248 | for (int i = 0; i < args.length; i++) { |
| 249 | Uri uri = new Uri(args[i]); |
| 250 | |
| 251 | String h = (uri.getHost() != null) ? uri.getHost() : ""; |
| 252 | String p = (uri.getPort() != -1) ? (":" + uri.getPort()) : ""; |
| 253 | String a = uri.hasAuthority ? ("//" + h + p) : ""; |
| 254 | String q = (uri.getQuery() != null) ? uri.getQuery() : ""; |
| 255 | |
| 256 | String str = uri.getScheme() + ":" + a + uri.getPath() + q; |
| 257 | if (! uri.toString().equals(str)) { |
| 258 | System.out.println(str); |
| 259 | } |
| 260 | System.out.println(h); |
| 261 | } |
| 262 | } |
| 263 | */ |
| 264 | } |