Java tutorial
/* * ==================================================================== * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. * */ package org.mcxiaoke.commons.http.util; import java.io.UnsupportedEncodingException; import java.net.URI; import java.net.URISyntaxException; import java.net.URLEncoder; import java.nio.ByteBuffer; import java.nio.CharBuffer; import java.nio.charset.Charset; import java.util.ArrayList; import java.util.BitSet; import java.util.Collection; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Scanner; import java.util.Stack; import org.apache.http.Header; import org.apache.http.HeaderElement; import org.apache.http.HttpEntity; import org.apache.http.HttpHost; import org.apache.http.NameValuePair; import org.apache.http.message.BasicHeaderValueParser; import org.apache.http.message.BasicNameValuePair; import org.apache.http.message.ParserCursor; import org.apache.http.util.CharArrayBuffer; import org.mcxiaoke.commons.util.StringUtils; /** * A collection of utilities for {@link URI URIs}, to workaround bugs within the * class or for ease-of-use features. * * @since 4.0 */ public class URIUtilsEx { /** * URL???Query? * * @param url * @param encoding * @return */ public static List<NameValuePair> getQueryParameters(String url, final String encoding) { if (StringUtils.isEmpty(url)) { return null; } try { return parse(new URI(url), encoding); } catch (URISyntaxException e) { e.printStackTrace(); } return null; } /** * URL???Query? * * @param url * @param encoding * @return */ public static Map<String, String> getQueryParameters2(String url, final String encoding) { if (StringUtils.isEmpty(url)) { return null; } try { return parse2(new URI(url), encoding); } catch (URISyntaxException e) { e.printStackTrace(); } return null; } /** * URL???Query? * * @param url * @param encoding * @return */ public static List<NameValuePair> getQueryParameters(final URI uri) { if (uri != null) { return parse(uri, ENCODING_UTF8); } return null; } /** * URL???Query? * * @param url * @param encoding * @return */ public static Map<String, String> getQueryParameters2(final URI uri) { if (uri != null) { return parse2(uri, ENCODING_UTF8); } return null; } /** * URL???Query? * * @param url * @param encoding * @return */ public static List<NameValuePair> getQueryParameters(final URI uri, final String encoding) { if (uri != null) { return parse(uri, encoding); } return null; } /** * URL???Query? * * @param url * @param encoding * @return */ public static Map<String, String> getQueryParameters2(final URI uri, final String encoding) { if (uri != null) { return parse2(uri, encoding); } return null; } /** * Query?? * * @param parameters * @param encoding * @return */ public static String getQueryString(List<NameValuePair> parameters) { if (parameters != null) { return format(parameters, ENCODING_UTF8); } return null; } /** * URLQuery?? * * @param url * @param parameters * @return */ public static String appendQueryParameters(String url, final Collection<? extends NameValuePair> parameters) { try { URIBuilderEx builder = new URIBuilderEx(url); builder.addParameters(parameters); return builder.build().toString(); } catch (URISyntaxException e) { e.printStackTrace(); } return null; } /** * URLQuery?? * * @param url * @param parameters * @return */ public static String appendQueryParameters(String url, final Map<String, String> parameters) { try { URIBuilderEx builder = new URIBuilderEx(url); builder.addParameters(parameters); return builder.build().toString(); } catch (URISyntaxException e) { e.printStackTrace(); } return null; } /** * URLQuery?? * * @param url * @param parameters * @return */ public static String appendQueryParameters2(String url, final Map<String, String> parameters) { final StringBuilder urlBuilder = new StringBuilder(); if (url == null || parameters == null || parameters.size() == 0) { return urlBuilder.toString(); } for (Map.Entry<String, String> entry : parameters.entrySet()) { if (urlBuilder.length() > 0) { urlBuilder.append(PARAMETER_SEPARATOR); } urlBuilder.append(encode(entry.getKey())); urlBuilder.append(NAME_VALUE_SEPARATOR); urlBuilder.append(encode(entry.getValue())); } if (url.indexOf("?") < 0) { urlBuilder.insert(0, "?"); } else { urlBuilder.insert(0, PARAMETER_SEPARATOR); } urlBuilder.insert(0, url); return urlBuilder.toString(); } /** * ?? * * @param text * @return */ public static String encode(String text) { if (StringUtils.isEmpty(text)) { return text; } try { text = URLEncoder.encode(text, ENCODING_UTF8); } catch (UnsupportedEncodingException e) { } return text; } /** * ??OAuth? * * @param value * @return */ public static String percentEncode(String value) { String encoded = null; try { encoded = URLEncoder.encode(value, ENCODING_UTF8); } catch (UnsupportedEncodingException ignore) { throw new RuntimeException(ignore); } StringBuilder sb = new StringBuilder(encoded.length()); char focus; for (int i = 0; i < encoded.length(); i++) { focus = encoded.charAt(i); if (focus == '*') { sb.append("%2A"); } else if (focus == '+') { sb.append("%20"); } else if (focus == '%' && (i + 1) < encoded.length() && encoded.charAt(i + 1) == '7' && encoded.charAt(i + 2) == 'E') { sb.append('~'); i += 2; } else { sb.append(focus); } } return sb.toString(); } /** * A convenience method for creating a new {@link URI} whose scheme, host * and port are taken from the target host, but whose path, query and * fragment are taken from the existing URI. The fragment is only used if * dropFragment is false. The path is set to "/" if not explicitly * specified. * * @param uri * Contains the path, query and fragment to use. * @param target * Contains the scheme, host and port to use. * @param dropFragment * True if the fragment should not be copied. * * @throws URISyntaxException * If the resulting URI is invalid. */ public static URI rewriteURI(final URI uri, final HttpHost target, boolean dropFragment) throws URISyntaxException { if (uri == null) { throw new IllegalArgumentException("URI may not be null"); } URIBuilderEx uribuilder = new URIBuilderEx(uri); if (target != null) { uribuilder.setScheme(target.getSchemeName()); uribuilder.setHost(target.getHostName()); uribuilder.setPort(target.getPort()); } else { uribuilder.setScheme(null); uribuilder.setHost(null); uribuilder.setPort(-1); } if (dropFragment) { uribuilder.setFragment(null); } if (uribuilder.getPath() == null || uribuilder.getPath().length() == 0) { uribuilder.setPath("/"); } return uribuilder.build(); } /** * A convenience method for * {@link URIUtilsEx#rewriteURI(URI, HttpHost, boolean)} that always keeps * the fragment. */ public static URI rewriteURI(final URI uri, final HttpHost target) throws URISyntaxException { return rewriteURI(uri, target, false); } /** * A convenience method that creates a new {@link URI} whose scheme, host, * port, path, query are taken from the existing URI, dropping any fragment * or user-information. The path is set to "/" if not explicitly specified. * The existing URI is returned unmodified if it has no fragment or * user-information and has a path. * * @param uri * original URI. * @throws URISyntaxException * If the resulting URI is invalid. */ public static URI rewriteURI(final URI uri) throws URISyntaxException { if (uri == null) { throw new IllegalArgumentException("URI may not be null"); } if (uri.getFragment() != null || uri.getUserInfo() != null || (uri.getPath() == null || uri.getPath().length() == 0)) { URIBuilderEx uribuilder = new URIBuilderEx(uri); uribuilder.setFragment(null).setUserInfo(null); if (uribuilder.getPath() == null || uribuilder.getPath().length() == 0) { uribuilder.setPath("/"); } return uribuilder.build(); } else { return uri; } } /** * Resolves a URI reference against a base URI. Work-around for bug in * java.net.URI * (<http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4708535>) * * @param baseURI * the base URI * @param reference * the URI reference * @return the resulting URI */ public static URI resolve(final URI baseURI, final String reference) { return URIUtilsEx.resolve(baseURI, URI.create(reference)); } /** * Resolves a URI reference against a base URI. Work-around for bugs in * java.net.URI (e.g. * <http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4708535>) * * @param baseURI * the base URI * @param reference * the URI reference * @return the resulting URI */ public static URI resolve(final URI baseURI, URI reference) { if (baseURI == null) { throw new IllegalArgumentException("Base URI may nor be null"); } if (reference == null) { throw new IllegalArgumentException("Reference URI may nor be null"); } String s = reference.toString(); if (s.startsWith("?")) { return resolveReferenceStartingWithQueryString(baseURI, reference); } boolean emptyReference = s.length() == 0; if (emptyReference) { reference = URI.create("#"); } URI resolved = baseURI.resolve(reference); if (emptyReference) { String resolvedString = resolved.toString(); resolved = URI.create(resolvedString.substring(0, resolvedString.indexOf('#'))); } return removeDotSegments(resolved); } /** * Resolves a reference starting with a query string. * * @param baseURI * the base URI * @param reference * the URI reference starting with a query string * @return the resulting URI */ private static URI resolveReferenceStartingWithQueryString(final URI baseURI, final URI reference) { String baseUri = baseURI.toString(); baseUri = baseUri.indexOf('?') > -1 ? baseUri.substring(0, baseUri.indexOf('?')) : baseUri; return URI.create(baseUri + reference.toString()); } /** * Removes dot segments according to RFC 3986, section 5.2.4 * * @param uri * the original URI * @return the URI without dot segments */ private static URI removeDotSegments(URI uri) { String path = uri.getPath(); if ((path == null) || (path.indexOf("/.") == -1)) { // No dot segments to remove return uri; } String[] inputSegments = path.split("/"); Stack<String> outputSegments = new Stack<String>(); for (int i = 0; i < inputSegments.length; i++) { if ((inputSegments[i].length() == 0) || (".".equals(inputSegments[i]))) { // Do nothing } else if ("..".equals(inputSegments[i])) { if (!outputSegments.isEmpty()) { outputSegments.pop(); } } else { outputSegments.push(inputSegments[i]); } } StringBuilder outputBuffer = new StringBuilder(); for (String outputSegment : outputSegments) { outputBuffer.append('/').append(outputSegment); } try { return new URI(uri.getScheme(), uri.getAuthority(), outputBuffer.toString(), uri.getQuery(), uri.getFragment()); } catch (URISyntaxException e) { throw new IllegalArgumentException(e); } } /** * Extracts target host from the given {@link URI}. * * @param uri * @return the target host if the URI is absolute or * <code>null</null> if the URI is * relative or does not contain a valid host name. * * @since 4.1 */ public static HttpHost extractHost(final URI uri) { if (uri == null) { return null; } HttpHost target = null; if (uri.isAbsolute()) { int port = uri.getPort(); // may be overridden later String host = uri.getHost(); if (host == null) { // normal parse failed; let's do it ourselves // authority does not seem to care about the valid character-set // for host names host = uri.getAuthority(); if (host != null) { // Strip off any leading user credentials int at = host.indexOf('@'); if (at >= 0) { if (host.length() > at + 1) { host = host.substring(at + 1); } else { host = null; // @ on its own } } // Extract the port suffix, if present if (host != null) { int colon = host.indexOf(':'); if (colon >= 0) { int pos = colon + 1; int len = 0; for (int i = pos; i < host.length(); i++) { if (Character.isDigit(host.charAt(i))) { len++; } else { break; } } if (len > 0) { try { port = Integer.parseInt(host.substring(pos, pos + len)); } catch (NumberFormatException ex) { } } host = host.substring(0, colon); } } } } String scheme = uri.getScheme(); if (host != null) { target = new HttpHost(host, port, scheme); } } return target; } /** * Returns a list of {@link NameValuePair NameValuePairs} as built from the * URI's query portion. For example, a URI of * http://example.org/path/to/file?a=1&b=2&c=3 would return a list of three * NameValuePairs, one for a=1, one for b=2, and one for c=3. * <p> * This is typically useful while parsing an HTTP PUT. * * @param uri * uri to parse * @param encoding * encoding to use while parsing the query */ public static List<NameValuePair> parse(final URI uri, final String encoding) { final String query = uri.getRawQuery(); if (query != null && query.length() > 0) { List<NameValuePair> result = new ArrayList<NameValuePair>(); Scanner scanner = new Scanner(query); parse(result, scanner, encoding); return result; } else { return null; } } /** * Returns a list of {@link NameValuePair NameValuePairs} as built from the * URI's query portion. For example, a URI of * http://example.org/path/to/file?a=1&b=2&c=3 would return a list of three * NameValuePairs, one for a=1, one for b=2, and one for c=3. * <p> * This is typically useful while parsing an HTTP PUT. * * @param uri * uri to parse * @param encoding * encoding to use while parsing the query */ public static Map<String, String> parse2(final URI uri, final String encoding) { final String query = uri.getRawQuery(); if (query != null && query.length() > 0) { Map<String, String> result = new HashMap<String, String>(); Scanner scanner = new Scanner(query); parse2(result, scanner, encoding); return result; } else { return null; } } /** * Returns true if the entity's Content-Type header is * <code>application/x-www-form-urlencoded</code>. */ public static boolean isEncoded(final HttpEntity entity) { Header h = entity.getContentType(); if (h != null) { HeaderElement[] elems = h.getElements(); if (elems.length > 0) { String contentType = elems[0].getName(); return contentType.equalsIgnoreCase(CONTENT_TYPE); } else { return false; } } else { return false; } } /** * Adds all parameters within the Scanner to the list of * <code>parameters</code>, as encoded by <code>encoding</code>. For * example, a scanner containing the string <code>a=1&b=2&c=3</code> would * add the {@link NameValuePair NameValuePairs} a=1, b=2, and c=3 to the * list of parameters. * * @param parameters * List to add parameters to. * @param scanner * Input that contains the parameters to parse. * @param charset * Encoding to use when decoding the parameters. */ public static void parse(final List<NameValuePair> parameters, final Scanner scanner, final String charset) { scanner.useDelimiter(PARAMETER_SEPARATOR); while (scanner.hasNext()) { String name = null; String value = null; String token = scanner.next(); int i = token.indexOf(NAME_VALUE_SEPARATOR); if (i != -1) { name = decodeFormFields(token.substring(0, i).trim(), charset); value = decodeFormFields(token.substring(i + 1).trim(), charset); } else { name = decodeFormFields(token.trim(), charset); } parameters.add(new BasicNameValuePair(name, value)); } } /** * Adds all parameters within the Scanner to the list of * <code>parameters</code>, as encoded by <code>encoding</code>. For * example, a scanner containing the string <code>a=1&b=2&c=3</code> would * add the {@link NameValuePair NameValuePairs} a=1, b=2, and c=3 to the * list of parameters. * * @param parameters * List to add parameters to. * @param scanner * Input that contains the parameters to parse. * @param charset * Encoding to use when decoding the parameters. */ public static void parse2(final Map<String, String> parameters, final Scanner scanner, final String charset) { scanner.useDelimiter(PARAMETER_SEPARATOR); while (scanner.hasNext()) { String key = null; String value = null; String token = scanner.next(); int i = token.indexOf(NAME_VALUE_SEPARATOR); if (i != -1) { key = decodeFormFields(token.substring(0, i).trim(), charset); value = decodeFormFields(token.substring(i + 1).trim(), charset); } else { key = decodeFormFields(token.trim(), charset); } parameters.put(key, value); } } private static final char[] DELIM = new char[] { '&' }; /** * Returns a list of {@link NameValuePair NameValuePairs} as parsed from the * given string using the given character encoding. * * @param s * text to parse. * @param charset * Encoding to use when decoding the parameters. * * @since 4.2 */ public static List<NameValuePair> parse(final String s, final Charset charset) { if (s == null) { return Collections.emptyList(); } BasicHeaderValueParser parser = BasicHeaderValueParser.DEFAULT; CharArrayBuffer buffer = new CharArrayBuffer(s.length()); buffer.append(s); ParserCursor cursor = new ParserCursor(0, buffer.length()); List<NameValuePair> list = new ArrayList<NameValuePair>(); while (!cursor.atEnd()) { NameValuePair nvp = parser.parseNameValuePair(buffer, cursor, DELIM); if (nvp.getName().length() > 0) { list.add(new BasicNameValuePair(decodeFormFields(nvp.getName(), charset), decodeFormFields(nvp.getValue(), charset))); } } return list; } /** * Returns a String that is suitable for use as an * <code>application/x-www-form-urlencoded</code> list of parameters in an * HTTP PUT or HTTP POST. * * @param parameters * The parameters to include. * @param encoding * The encoding to use. */ public static String format(final List<? extends NameValuePair> parameters, final String encoding) { final StringBuilder result = new StringBuilder(); for (final NameValuePair parameter : parameters) { final String encodedName = encodeFormFields(parameter.getName(), encoding); final String encodedValue = encodeFormFields(parameter.getValue(), encoding); if (result.length() > 0) { result.append(PARAMETER_SEPARATOR); } result.append(encodedName); if (encodedValue != null) { result.append(NAME_VALUE_SEPARATOR); result.append(encodedValue); } } return result.toString(); } /** * Returns a String that is suitable for use as an * <code>application/x-www-form-urlencoded</code> list of parameters in an * HTTP PUT or HTTP POST. * * @param parameters * The parameters to include. * @param charset * The encoding to use. * * @since 4.2 */ public static String format(final Iterable<? extends NameValuePair> parameters, final Charset charset) { final StringBuilder result = new StringBuilder(); for (final NameValuePair parameter : parameters) { final String encodedName = encodeFormFields(parameter.getName(), charset); final String encodedValue = encodeFormFields(parameter.getValue(), charset); if (result.length() > 0) { result.append(PARAMETER_SEPARATOR); } result.append(encodedName); if (encodedValue != null) { result.append(NAME_VALUE_SEPARATOR); result.append(encodedValue); } } return result.toString(); } /** * Emcode/escape a portion of a URL, to use with the query part ensure * {@code plusAsBlank} is true. * * @param content * the portion to decode * @param charset * the charset to use * @param blankAsPlus * if {@code true}, then convert space to '+' (e.g. for * www-url-form-encoded content), otherwise leave as is. * @return */ private static String urlencode(final String content, final Charset charset, final BitSet safechars, final boolean blankAsPlus) { if (content == null) { return null; } StringBuilder buf = new StringBuilder(); ByteBuffer bb = charset.encode(content); while (bb.hasRemaining()) { int b = bb.get() & 0xff; if (safechars.get(b)) { buf.append((char) b); } else if (blankAsPlus && b == ' ') { buf.append('+'); } else { buf.append("%"); char hex1 = Character.toUpperCase(Character.forDigit((b >> 4) & 0xF, RADIX)); char hex2 = Character.toUpperCase(Character.forDigit(b & 0xF, RADIX)); buf.append(hex1); buf.append(hex2); } } return buf.toString(); } /** * Decode/unescape a portion of a URL, to use with the query part ensure * {@code plusAsBlank} is true. * * @param content * the portion to decode * @param charset * the charset to use * @param plusAsBlank * if {@code true}, then convert '+' to space (e.g. for * www-url-form-encoded content), otherwise leave as is. * @return */ private static String urldecode(final String content, final Charset charset, final boolean plusAsBlank) { if (content == null) { return null; } ByteBuffer bb = ByteBuffer.allocate(content.length()); CharBuffer cb = CharBuffer.wrap(content); while (cb.hasRemaining()) { char c = cb.get(); if (c == '%' && cb.remaining() >= 2) { char uc = cb.get(); char lc = cb.get(); int u = Character.digit(uc, 16); int l = Character.digit(lc, 16); if (u != -1 && l != -1) { bb.put((byte) ((u << 4) + l)); } else { bb.put((byte) '%'); bb.put((byte) uc); bb.put((byte) lc); } } else if (plusAsBlank && c == '+') { bb.put((byte) ' '); } else { bb.put((byte) c); } } bb.flip(); return charset.decode(bb).toString(); } /** * Decode/unescape www-url-form-encoded content. * * @param content * the content to decode, will decode '+' as space * @param charset * the charset to use * @return */ private static String decodeFormFields(final String content, final String charset) { if (content == null) { return null; } return urldecode(content, charset != null ? Charset.forName(charset) : UTF_8, true); } /** * Decode/unescape www-url-form-encoded content. * * @param content * the content to decode, will decode '+' as space * @param charset * the charset to use * @return */ private static String decodeFormFields(final String content, final Charset charset) { if (content == null) { return null; } return urldecode(content, charset != null ? charset : UTF_8, true); } /** * Encode/escape www-url-form-encoded content. * <p> * Uses the {@link #URLENCODER} set of characters, rather than the * {@link #UNRSERVED} set; this is for compatibilty with previous releases, * URLEncoder.encode() and most browsers. * * @param content * the content to encode, will convert space to '+' * @param charset * the charset to use * @return */ private static String encodeFormFields(final String content, final String charset) { if (content == null) { return null; } return urlencode(content, charset != null ? Charset.forName(charset) : UTF_8, URLENCODER, true); } /** * Encode/escape www-url-form-encoded content. * <p> * Uses the {@link #URLENCODER} set of characters, rather than the * {@link #UNRSERVED} set; this is for compatibilty with previous releases, * URLEncoder.encode() and most browsers. * * @param content * the content to encode, will convert space to '+' * @param charset * the charset to use * @return */ private static String encodeFormFields(final String content, final Charset charset) { if (content == null) { return null; } return urlencode(content, charset != null ? charset : UTF_8, URLENCODER, true); } /** * Encode a String using the {@link #USERINFO} set of characters. * <p> * Used by URIBuilder to encode the userinfo segment. * * @param content * the string to encode, does not convert space to '+' * @param charset * the charset to use * @return the encoded string */ static String encUserInfo(final String content, final Charset charset) { return urlencode(content, charset, USERINFO, false); } /** * Encode a String using the {@link #FRAGMENT} set of characters. * <p> * Used by URIBuilder to encode the userinfo segment. * * @param content * the string to encode, does not convert space to '+' * @param charset * the charset to use * @return the encoded string */ static String encFragment(final String content, final Charset charset) { return urlencode(content, charset, FRAGMENT, false); } /** * Encode a String using the {@link #PATHSAFE} set of characters. * <p> * Used by URIBuilder to encode path segments. * * @param content * the string to encode, does not convert space to '+' * @param charset * the charset to use * @return the encoded string */ static String encPath(final String content, final Charset charset) { return urlencode(content, charset, PATHSAFE, false); } /** * Unreserved characters, i.e. alphanumeric, plus: {@code _ - ! . ~ ' ( ) *} * <p> * This list is the same as the {@code unreserved} list in <a * href="http://www.ietf.org/rfc/rfc2396.txt">RFC 2396</a> */ private static final BitSet UNRESERVED = new BitSet(256); /** * Punctuation characters: , ; : $ & + = * <p> * These are the additional characters allowed by userinfo. */ private static final BitSet PUNCT = new BitSet(256); /** * Characters which are safe to use in userinfo, i.e. {@link #UNRESERVED} * plus {@link #PUNCT}uation */ private static final BitSet USERINFO = new BitSet(256); /** * Characters which are safe to use in a path, i.e. {@link #UNRESERVED} plus * {@link #PUNCT}uation plus / @ */ private static final BitSet PATHSAFE = new BitSet(256); /** * Characters which are safe to use in a fragment, i.e. {@link #RESERVED} * plus {@link #UNRESERVED} */ private static final BitSet FRAGMENT = new BitSet(256); /** * Reserved characters, i.e. {@code ;/?:@&=+$,[]} * <p> * This list is the same as the {@code reserved} list in <a * href="http://www.ietf.org/rfc/rfc2396.txt">RFC 2396</a> as augmented by * <a href="http://www.ietf.org/rfc/rfc2732.txt">RFC 2732</a> */ private static final BitSet RESERVED = new BitSet(256); /** * Safe characters for x-www-form-urlencoded data, as per * java.net.URLEncoder and browser behaviour, i.e. alphanumeric plus * {@code "-", "_", ".", "*"} */ private static final BitSet URLENCODER = new BitSet(256); static { // unreserved chars // alpha characters for (int i = 'a'; i <= 'z'; i++) { UNRESERVED.set(i); } for (int i = 'A'; i <= 'Z'; i++) { UNRESERVED.set(i); } // numeric characters for (int i = '0'; i <= '9'; i++) { UNRESERVED.set(i); } UNRESERVED.set('_'); // these are the charactes of the "mark" list UNRESERVED.set('-'); UNRESERVED.set('.'); UNRESERVED.set('*'); URLENCODER.or(UNRESERVED); // skip remaining unreserved characters UNRESERVED.set('!'); UNRESERVED.set('~'); UNRESERVED.set('\''); UNRESERVED.set('('); UNRESERVED.set(')'); // punct chars PUNCT.set(','); PUNCT.set(';'); PUNCT.set(':'); PUNCT.set('$'); PUNCT.set('&'); PUNCT.set('+'); PUNCT.set('='); // Safe for userinfo USERINFO.or(UNRESERVED); USERINFO.or(PUNCT); // URL path safe PATHSAFE.or(UNRESERVED); PATHSAFE.set('/'); // segment separator PATHSAFE.set(';'); // param separator PATHSAFE.set(':'); // rest as per list in 2396, i.e. : @ & = + $ , PATHSAFE.set('@'); PATHSAFE.set('&'); PATHSAFE.set('='); PATHSAFE.set('+'); PATHSAFE.set('$'); PATHSAFE.set(','); RESERVED.set(';'); RESERVED.set('/'); RESERVED.set('?'); RESERVED.set(':'); RESERVED.set('@'); RESERVED.set('&'); RESERVED.set('='); RESERVED.set('+'); RESERVED.set('$'); RESERVED.set(','); RESERVED.set('['); // added by RFC 2732 RESERVED.set(']'); // added by RFC 2732 FRAGMENT.or(RESERVED); FRAGMENT.or(UNRESERVED); } private static final int RADIX = 16; public static final int CR = 13; // <US-ASCII CR, carriage return (13)> public static final int LF = 10; // <US-ASCII LF, linefeed (10)> public static final int SP = 32; // <US-ASCII SP, space (32)> public static final int HT = 9; // <US-ASCII HT, horizontal-tab (9)> public static final String ENCODING_UTF8 = "UTF-8"; public static final Charset UTF_8 = Charset.forName("UTF-8"); public static final Charset ASCII = Charset.forName("US-ASCII"); public static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1"); private static final String CONTENT_TYPE = "application/x-www-form-urlencoded"; public static final String PARAMETER_SEPARATOR = "&"; public static final String NAME_VALUE_SEPARATOR = "="; public static final String QUERY_STRING_SEPARATOR = "?"; public static final String EMPTY_STRING = ""; /** * This class should not be instantiated. */ private URIUtilsEx() { } }