* This is typically useful while parsing an HTTP PUT.
*
* This API is currently only used for testing.
*
* @param uri
* URI to parse
* @param charset
* Charset to use while parsing the query
* @return a list of {@link NameValuePair} as built from the URI's query portion.
*
* @since 4.5
*/
public static List
* This list is the same as the {@code unreserved} list in
* RFC 2396
*/
private static final BitSet UNRESERVED = new BitSet(256);
/**
* Punctuation characters: , ; : $ & + =
*
* These are the additional characters allowed by userinfo.
*/
private static final BitSet PUNCT = new BitSet(256);
/** Characters which are safe to use in userinfo,
* i.e. {@link #UNRESERVED} plus {@link #PUNCT}uation */
private static final BitSet USERINFO = new BitSet(256);
/** Characters which are safe to use in a path,
* i.e. {@link #UNRESERVED} plus {@link #PUNCT}uation plus / @ */
private static final BitSet PATHSAFE = new BitSet(256);
/** Characters which are safe to use in a query or a fragment,
* i.e. {@link #RESERVED} plus {@link #UNRESERVED} */
private static final BitSet URIC = new BitSet(256);
/**
* Reserved characters, i.e. {@code ;/?:@&=+$,[]}
*
* This list is the same as the {@code reserved} list in
* RFC 2396
* as augmented by
* RFC 2732
*/
private static final BitSet RESERVED = new BitSet(256);
/**
* Safe characters for x-www-form-urlencoded data, as per java.net.URLEncoder and browser behaviour,
* i.e. alphanumeric plus {@code "-", "_", ".", "*"}
*/
private static final BitSet URLENCODER = new BitSet(256);
static {
// unreserved chars
// alpha characters
for (int i = 'a'; i <= 'z'; i++) {
UNRESERVED.set(i);
}
for (int i = 'A'; i <= 'Z'; i++) {
UNRESERVED.set(i);
}
// numeric characters
for (int i = '0'; i <= '9'; i++) {
UNRESERVED.set(i);
}
UNRESERVED.set('_'); // these are the charactes of the "mark" list
UNRESERVED.set('-');
UNRESERVED.set('.');
UNRESERVED.set('*');
URLENCODER.or(UNRESERVED); // skip remaining unreserved characters
UNRESERVED.set('!');
UNRESERVED.set('~');
UNRESERVED.set('\'');
UNRESERVED.set('(');
UNRESERVED.set(')');
// punct chars
PUNCT.set(',');
PUNCT.set(';');
PUNCT.set(':');
PUNCT.set('$');
PUNCT.set('&');
PUNCT.set('+');
PUNCT.set('=');
// Safe for userinfo
USERINFO.or(UNRESERVED);
USERINFO.or(PUNCT);
// URL path safe
PATHSAFE.or(UNRESERVED);
PATHSAFE.set('/'); // segment separator
PATHSAFE.set(';'); // param separator
PATHSAFE.set(':'); // rest as per list in 2396, i.e. : @ & = + $ ,
PATHSAFE.set('@');
PATHSAFE.set('&');
PATHSAFE.set('=');
PATHSAFE.set('+');
PATHSAFE.set('$');
PATHSAFE.set(',');
RESERVED.set(';');
RESERVED.set('/');
RESERVED.set('?');
RESERVED.set(':');
RESERVED.set('@');
RESERVED.set('&');
RESERVED.set('=');
RESERVED.set('+');
RESERVED.set('$');
RESERVED.set(',');
RESERVED.set('['); // added by RFC 2732
RESERVED.set(']'); // added by RFC 2732
URIC.or(RESERVED);
URIC.or(UNRESERVED);
}
private static final int RADIX = 16;
private static String urlEncode(
final String content,
final Charset charset,
final BitSet safechars,
final boolean blankAsPlus) {
if (content == null) {
return null;
}
final StringBuilder buf = new StringBuilder();
final ByteBuffer bb = charset.encode(content);
while (bb.hasRemaining()) {
final int b = bb.get() & 0xff;
if (safechars.get(b)) {
buf.append((char) b);
} else if (blankAsPlus && b == ' ') {
buf.append('+');
} else {
buf.append("%");
final char hex1 = Character.toUpperCase(Character.forDigit((b >> 4) & 0xF, RADIX));
final char hex2 = Character.toUpperCase(Character.forDigit(b & 0xF, RADIX));
buf.append(hex1);
buf.append(hex2);
}
}
return buf.toString();
}
/**
* Decode/unescape a portion of a URL, to use with the query part ensure {@code plusAsBlank} is true.
*
* @param content the portion to decode
* @param charset the charset to use
* @param plusAsBlank if {@code true}, then convert '+' to space (e.g. for www-url-form-encoded content), otherwise leave as is.
* @return encoded string
*/
private static String urlDecode(
final String content,
final Charset charset,
final boolean plusAsBlank) {
if (content == null) {
return null;
}
final ByteBuffer bb = ByteBuffer.allocate(content.length());
final CharBuffer cb = CharBuffer.wrap(content);
while (cb.hasRemaining()) {
final char c = cb.get();
if (c == '%' && cb.remaining() >= 2) {
final char uc = cb.get();
final char lc = cb.get();
final int u = Character.digit(uc, 16);
final int l = Character.digit(lc, 16);
if (u != -1 && l != -1) {
bb.put((byte) ((u << 4) + l));
} else {
bb.put((byte) '%');
bb.put((byte) uc);
bb.put((byte) lc);
}
} else if (plusAsBlank && c == '+') {
bb.put((byte) ' ');
} else {
bb.put((byte) c);
}
}
bb.flip();
return charset.decode(bb).toString();
}
/**
* Decode/unescape www-url-form-encoded content.
*
* @param content the content to decode, will decode '+' as space
* @param charset the charset to use
* @return encoded string
*/
private static String decodeFormFields (final String content, final Charset charset) {
if (content == null) {
return null;
}
return urlDecode(content, charset != null ? charset : StandardCharsets.UTF_8, true);
}
/**
* Encode/escape www-url-form-encoded content.
*
* Uses the {@link #URLENCODER} set of characters, rather than
* the {@link #UNRESERVED} set; this is for compatibilty with previous
* releases, URLEncoder.encode() and most browsers.
*
* @param content the content to encode, will convert space to '+'
* @param charset the charset to use
* @return encoded string
*/
private static String encodeFormFields (final String content, final Charset charset) {
if (content == null) {
return null;
}
return urlEncode(content, charset != null ? charset : StandardCharsets.UTF_8, URLENCODER, true);
}
/**
* Encode a String using the {@link #USERINFO} set of characters.
*
* Used by URIBuilder to encode the userinfo segment.
*
* @param content the string to encode, does not convert space to '+'
* @param charset the charset to use
* @return the encoded string
*/
static String encUserInfo(final String content, final Charset charset) {
return urlEncode(content, charset, USERINFO, false);
}
/**
* Encode a String using the {@link #URIC} set of characters.
*
* Used by URIBuilder to encode the query and fragment segments.
*
* @param content the string to encode, does not convert space to '+'
* @param charset the charset to use
* @return the encoded string
*/
static String encUric(final String content, final Charset charset) {
return urlEncode(content, charset, URIC, false);
}
/**
* Encode a String using the {@link #PATHSAFE} set of characters.
*
* Used by URIBuilder to encode path segments.
*
* @param content the string to encode, does not convert space to '+'
* @param charset the charset to use
* @return the encoded string
*/
static String encPath(final String content, final Charset charset) {
return urlEncode(content, charset, PATHSAFE, false);
}
}