org.apache.myfaces.shared_tomahawk.resource.ResourceValidationUtils Maven / Gradle / Ivy
/*
* 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 org.apache.myfaces.shared_tomahawk.resource;
public class ResourceValidationUtils
{
public static boolean isValidResourceName(String resourceName)
{
return validateResourceName(resourceName, true);
}
public static boolean isValidLibraryName(String libraryName)
{
return validate(libraryName, false);
}
public static boolean isValidLibraryName(String libraryName, boolean allowSlash)
{
return validate(libraryName, allowSlash);
}
public static boolean isValidLocalePrefix(String localePrefix)
{
for (int i = 0; i < localePrefix.length(); i++)
{
char c = localePrefix.charAt(i);
if ( (c >='A' && c <='Z') || c == '_' || (c >='a' && c <='z') || (c >='0' && c <='9') )
{
continue;
}
else
{
return false;
}
}
return true;
}
private static boolean validate(String expression, boolean allowSlash)
{
if (expression.length() == 2 &&
expression.charAt(0) == '.' &&
expression.charAt(1) == '.')
{
return false;
}
for (int i = 0; i < expression.length(); i++)
{
char c = expression.charAt(i);
// Enforce NameChar convention as specified
// http://www.w3.org/TR/REC-xml/#NT-NameChar
// Valid characters for NameChar
// ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] |
// [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] |
// [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF]
// | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
// "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
// Excluding ":"
if ( (c >='A' && c <='Z') || c == '_' || (c >='a' && c <='z') ||
(c >=0xC0 && c <=0xD6) || (c >=0xD8 && c <=0xF6) ||
(c >=0xF8 && c <=0x2FF) || (c >=0x370 && c <=0x37D) ||
(c >=0x37F && c <=0x1FFF) || (c >=0x200C && c <=0x200D) ||
(c >=0x2070 && c <=0x218F) || (c >=0x2C00 && c <=0x2FEF) ||
(c >=0x3001 && c <=0xD7FF) || (c >=0xF900 && c <=0xFDCF) ||
(c >=0xFDF0 && c <=0xFFFD) || (c >=0x10000 && c <=0xEFFFF) ||
c == '-' || (c >='0' && c <='9') || c == 0xB7 || (c >=0x300 && c <=0x36F) ||
(c >=0x203F && c <=0x2040) || (allowSlash && c == '/')
)
{
continue;
}
else if (c == '.')
{
if (i+2 < expression.length())
{
char c1 = expression.charAt(i+1);
char c2 = expression.charAt(i+2);
if (c == c1 && (c2 == '/' || c2 == '\\' ) )
{
return false;
}
}
continue;
}
else
{
return false;
}
}
if (expression.length() >= 3)
{
int length = expression.length();
if ( (expression.charAt(length-3) == '/' || expression.charAt(length-3) == '\\' ) &&
expression.charAt(length-2) == '.' &&
expression.charAt(length-1) == '.' )
{
return false;
}
}
return true;
}
private static boolean validateResourceName(String expression, boolean allowSlash)
{
if (expression.length() == 2 &&
expression.charAt(0) == '.' &&
expression.charAt(1) == '.')
{
return false;
}
for (int i = 0; i < expression.length(); i++)
{
char c = expression.charAt(i);
// Enforce NameChar convention as specified
// http://www.w3.org/TR/REC-xml/#NT-NameChar
// Valid characters for NameChar
// ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] |
// [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] |
// [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF]
// | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
// "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
// Excluding ":"
// Forbidden chars by win
// < (less than)
// > (greater than)
// : (colon)
// " (double quote)
// / (forward slash)
// \ (backslash)
// | (vertical bar or pipe)
// ? (question mark)
// * (asterisk)
// Do not use chars in UNIX because they have special meaning
// *&%$|^/\~
if ( (c >='A' && c <='Z') || c == '_' || (c >='a' && c <='z') ||
(c >=0xC0 && c <=0xD6) || (c >=0xD8 && c <=0xF6) ||
(c >=0xF8 && c <=0x2FF) || (c >=0x370 && c <=0x37D) ||
(c >=0x37F && c <=0x1FFF) || (c >=0x200C && c <=0x200D) ||
(c >=0x2070 && c <=0x218F) || (c >=0x2C00 && c <=0x2FEF) ||
(c >=0x3001 && c <=0xD7FF) || (c >=0xF900 && c <=0xFDCF) ||
(c >=0xFDF0 && c <=0xFFFD) || (c >=0x10000 && c <=0xEFFFF) ||
(c == '-') || (c >='0' && c <='9') || c == 0xB7 || (c >=0x300 && c <=0x36F) ||
(c >=0x203F && c <=0x2040) || (allowSlash && c == '/') ||
(c == '!') || (c == '#') || (c == '\'') || (c == '(') || (c == ')') ||
(c == '+') || (c == ',') || (c == ';' ) || (c == '=') ||
(c == '@') || (c == '[') || (c == ']' ) || (c == '{') || (c == '}'))
{
continue;
}
else if (c == '.')
{
if (i+2 < expression.length())
{
char c1 = expression.charAt(i+1);
char c2 = expression.charAt(i+2);
if (c == c1 && (c2 == '/' || c2 == '\\' ) )
{
return false;
}
}
continue;
}
else
{
return false;
}
}
if (expression.length() >= 3)
{
int length = expression.length();
if ( (expression.charAt(length-3) == '/' || expression.charAt(length-3) == '\\' ) &&
expression.charAt(length-2) == '.' &&
expression.charAt(length-1) == '.' )
{
return false;
}
}
return true;
}
}