Utility class for working with URIs and URLs.
| 28 | * Utility class for working with URIs and URLs. |
| 29 | */ |
| 30 | public final class UriUtil { |
| 31 | |
| 32 | private static final char[] HEX = |
| 33 | { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; |
| 34 | |
| 35 | private static final Pattern PATTERN_EXCLAMATION_MARK = Pattern.compile("!/"); |
| 36 | private static final Pattern PATTERN_ASTERISK = Pattern.compile("\\*/"); |
| 37 | private static final Pattern PATTERN_CUSTOM; |
| 38 | private static final String REPLACE_CUSTOM; |
| 39 | |
| 40 | private static final String WAR_SEPARATOR; |
| 41 | |
| 42 | static { |
| 43 | String custom = System.getProperty("org.apache.tomcat.util.buf.UriUtil.WAR_SEPARATOR"); |
| 44 | if (custom == null) { |
| 45 | WAR_SEPARATOR = "*/"; |
| 46 | PATTERN_CUSTOM = null; |
| 47 | REPLACE_CUSTOM = null; |
| 48 | } else { |
| 49 | WAR_SEPARATOR = custom + "/"; |
| 50 | PATTERN_CUSTOM = Pattern.compile(Pattern.quote(WAR_SEPARATOR)); |
| 51 | StringBuilder sb = new StringBuilder(custom.length() * 3); |
| 52 | // Deliberately use the platform's default encoding |
| 53 | byte[] ba = custom.getBytes(); |
| 54 | for (byte toEncode : ba) { |
| 55 | // Converting each byte in the buffer |
| 56 | sb.append('%'); |
| 57 | int low = toEncode & 0x0f; |
| 58 | int high = (toEncode & 0xf0) >> 4; |
| 59 | sb.append(HEX[high]); |
| 60 | sb.append(HEX[low]); |
| 61 | } |
| 62 | REPLACE_CUSTOM = sb.toString(); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | |
| 67 | private UriUtil() { |
| 68 | // Utility class. Hide default constructor |
| 69 | } |
| 70 | |
| 71 | |
| 72 | /** |
| 73 | * Determine if the character is allowed in the scheme of a URI. See RFC 2396, Section 3.1 |
| 74 | * |
| 75 | * @param c The character to test |
| 76 | * |
| 77 | * @return {@code true} if the character is allowed, otherwise {@code |
| 78 | * false} |
| 79 | */ |
| 80 | private static boolean isSchemeChar(char c) { |
| 81 | return Character.isLetterOrDigit(c) || c == '+' || c == '-' || c == '.'; |
| 82 | } |
| 83 | |
| 84 | |
| 85 | /** |
| 86 | * Determine if a URI string has a <code>scheme</code> component. |
| 87 | * |