/**
* @param queryString a query string of the form n1=v1&n2=v2&... to decode. May be null.
* @param acceptAmp -> "&" if true, "&" if false
* @return a Map of String[] indexed by name, an empty Map if the query string was null
*/
public static Map<String, String[]> decodeQueryString(
final CharSequence queryString, final boolean acceptAmp) {
final Map<String, String[]> result = new TreeMap<String, String[]>();
if (queryString != null) {
final Matcher matcher =
acceptAmp ? PATTERN_AMP.matcher(queryString) : PATTERN_NO_AMP.matcher(queryString);
int matcherEnd = 0;
while (matcher.find()) {
matcherEnd = matcher.end();
try {
// Group 0 is the whole match, e.g. a=b, while group 1 is the first group
// denoted ( with parens ) in the expression. Hence we start with group 1.
final String name =
URLDecoder.decode(matcher.group(1), NetUtils.STANDARD_PARAMETER_ENCODING);
final String value =
URLDecoder.decode(matcher.group(2), NetUtils.STANDARD_PARAMETER_ENCODING);
StringUtils.addValueToStringArrayMap(result, name, value);
} catch (UnsupportedEncodingException e) {
// Should not happen as we are using a required encoding
throw new OXFException(e);
}
}
if (queryString.length() != matcherEnd) {
// There was garbage at the end of the query.
throw new OXFException("Malformed URL: " + queryString);
}
}
return result;
}
