private static string percentDecode(string str, string encoding)
{
int len=str.Length;
bool percent=false;
for(int i=0;i<len;i++){
char c=str[i];
if(c=='%') {
percent=true;
} else if(c>=0x80) // Non-ASCII characters not allowed
return null;
}
if(!percent)return str;
ITextDecoder decoder=TextEncoding.getDecoder(encoding);
ByteList mos=new ByteList();
for(int i=0;i<len;i++){
int c=str[i];
if(c=='%'){
if(i+2<len){
int a=toHexNumber(str[i+1]);
int b=toHexNumber(str[i+2]);
if(a>=0 && b>=0){
mos.append((byte) (a*16+b));
i+=2;
continue;
}
}
}
mos.append((byte) (c&0xFF));
}
return TextEncoding.decodeString(mos.toInputStream(),
decoder, TextEncoding.ENCODING_ERROR_REPLACE);
}
private static byte[] getDataURLBytesInternal(string dataPath)
{
// assumes "data" consists of just the path extracted from a URL/URI
int index=HeaderParser.skipDataUrlContentType(dataPath, 0,dataPath.Length,null);
bool base64=false;
if(com.upokecenter.util.StringUtility.startsWith(dataPath,";base64,",index)){
index+=7;
base64=true;
}
if(index<dataPath.Length && dataPath[index]==','){
index++;
ByteList mos=new ByteList();
int len=dataPath.Length;
for(int j=index;j<len;j++){
int c=dataPath[j];
// matches productions "unreserved" and
// "reserved" of RFC2396, including
// '?' (even though it delimits
// a query _string, which is allowed in all
// URIs as of RFC3986)
if(!((c&0x7F)==c && "-_.!~*'();/:@&=+$,?".IndexOf((char)c)>=0) &&
!(c>='A' && c<='Z') &&
!(c>='a' && c<='z') &&
!(c>='0' && c<='9'))
return null;
// matches percent-encoded characters
// (production "escaped" of RFC2396)
if(c=='%'){
if(index+2<len){
int a=HeaderParser.toHexNumber(dataPath[index+1]);
int b=HeaderParser.toHexNumber(dataPath[index+2]);
if(a>=0 && b>=0){
mos.append((byte) (a*16+b));
index+=2;
continue;
}
}
}
mos.append((byte) (c&0xFF));
}
byte[] retval=mos.toByteArray();
if(base64){
try {
return Base64.decode(retval);
} catch(IOException){
return null;
}
}
return retval;
} else
return null;
}
