130 lines
4.6 KiB
Java
130 lines
4.6 KiB
Java
/*
|
|
* 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.
|
|
*/
|
|
|
|
package javax.xml.parsers;
|
|
|
|
class FilePathToURI {
|
|
|
|
// which ASCII characters need to be escaped
|
|
private static boolean gNeedEscaping[] = new boolean[128];
|
|
// the first hex character if a character needs to be escaped
|
|
private static char[] gAfterEscaping1 = new char[128];
|
|
// the second hex character if a character needs to be escaped
|
|
private static char[] gAfterEscaping2 = new char[128];
|
|
private static char[] gHexChs = {'0', '1', '2', '3', '4', '5', '6', '7',
|
|
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
|
|
// initialize the above 3 arrays
|
|
static {
|
|
for (int i = 0; i <= 0x1f; i++) {
|
|
gNeedEscaping[i] = true;
|
|
gAfterEscaping1[i] = gHexChs[i >> 4];
|
|
gAfterEscaping2[i] = gHexChs[i & 0xf];
|
|
}
|
|
gNeedEscaping[0x7f] = true;
|
|
gAfterEscaping1[0x7f] = '7';
|
|
gAfterEscaping2[0x7f] = 'F';
|
|
char[] escChs = {' ', '<', '>', '#', '%', '"', '{', '}',
|
|
'|', '\\', '^', '~', '[', ']', '`'};
|
|
int len = escChs.length;
|
|
char ch;
|
|
for (int i = 0; i < len; i++) {
|
|
ch = escChs[i];
|
|
gNeedEscaping[ch] = true;
|
|
gAfterEscaping1[ch] = gHexChs[ch >> 4];
|
|
gAfterEscaping2[ch] = gHexChs[ch & 0xf];
|
|
}
|
|
}
|
|
|
|
// To escape a file path to a URI, by using %HH to represent
|
|
// special ASCII characters: 0x00~0x1F, 0x7F, ' ', '<', '>', '#', '%'
|
|
// and '"' and non-ASCII characters (whose value >= 128).
|
|
public static String filepath2URI(String path){
|
|
// return null if path is null.
|
|
if (path == null)
|
|
return null;
|
|
|
|
char separator = java.io.File.separatorChar;
|
|
path = path.replace(separator, '/');
|
|
|
|
int len = path.length(), ch;
|
|
StringBuilder buffer = new StringBuilder(len*3);
|
|
buffer.append("file://");
|
|
// change C:/blah to /C:/blah
|
|
if (len >= 2 && path.charAt(1) == ':') {
|
|
ch = Character.toUpperCase(path.charAt(0));
|
|
if (ch >= 'A' && ch <= 'Z') {
|
|
buffer.append('/');
|
|
}
|
|
}
|
|
|
|
// for each character in the path
|
|
int i = 0;
|
|
for (; i < len; i++) {
|
|
ch = path.charAt(i);
|
|
// if it's not an ASCII character, break here, and use UTF-8 encoding
|
|
if (ch >= 128)
|
|
break;
|
|
if (gNeedEscaping[ch]) {
|
|
buffer.append('%');
|
|
buffer.append(gAfterEscaping1[ch]);
|
|
buffer.append(gAfterEscaping2[ch]);
|
|
// record the fact that it's escaped
|
|
}
|
|
else {
|
|
buffer.append((char)ch);
|
|
}
|
|
}
|
|
|
|
// we saw some non-ascii character
|
|
if (i < len) {
|
|
// get UTF-8 bytes for the remaining sub-string
|
|
byte[] bytes = null;
|
|
byte b;
|
|
try {
|
|
bytes = path.substring(i).getBytes("UTF-8");
|
|
} catch (java.io.UnsupportedEncodingException e) {
|
|
// should never happen
|
|
return path;
|
|
}
|
|
len = bytes.length;
|
|
|
|
// for each byte
|
|
for (i = 0; i < len; i++) {
|
|
b = bytes[i];
|
|
// for non-ascii character: make it positive, then escape
|
|
if (b < 0) {
|
|
ch = b + 256;
|
|
buffer.append('%');
|
|
buffer.append(gHexChs[ch >> 4]);
|
|
buffer.append(gHexChs[ch & 0xf]);
|
|
}
|
|
else if (gNeedEscaping[b]) {
|
|
buffer.append('%');
|
|
buffer.append(gAfterEscaping1[b]);
|
|
buffer.append(gAfterEscaping2[b]);
|
|
}
|
|
else {
|
|
buffer.append((char)b);
|
|
}
|
|
}
|
|
}
|
|
|
|
return buffer.toString();
|
|
}
|
|
|
|
}//FilePathToURI
|