com.jfrog.bintray.client.impl.util.URI Maven / Gradle / Ivy
/*
* $HeadURL: https://svn.apache.org/repos/asf/jakarta/httpcomponents/oac.hc3x/tags/HTTPCLIENT_3_1/src/java/org/apache/commons/httpclient/URI.java $
* $Revision: 564973 $
* $Date: 2007-08-11 22:51:47 +0200 (Sat, 11 Aug 2007) $
*
* ====================================================================
*
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
*
* URI character sequence: char
* octet sequence: byte
* original character sequence: String
*
*
* So, a URI is a sequence of characters as an array of a char type, which
* is not always represented as a sequence of octets as an array of byte.
*
*
* URI Syntactic Components
*
* - In general, written as follows:
* Absolute URI = <scheme>:<scheme-specific-part>
* Generic URI = <scheme>://<authority><path>?<query>
*
* - Syntax
* absoluteURI = scheme ":" ( hier_part | opaque_part )
* hier_part = ( net_path | abs_path ) [ "?" query ]
* net_path = "//" authority [ abs_path ]
* abs_path = "/" path_segments
*
*
* The following examples illustrate URI that are in common use.
*
* ftp://ftp.is.co.za/rfc/rfc1808.txt
* -- ftp scheme for File Transfer Protocol services
* gopher://spinaltap.micro.umn.edu/00/Weather/California/Los%20Angeles
* -- gopher scheme for Gopher and Gopher+ Protocol services
* http://www.math.uio.no/faq/compression-faq/part1.html
* -- http scheme for Hypertext Transfer Protocol services
* mailto:[email protected]
* -- mailto scheme for electronic mail addresses
* news:comp.infosystems.www.servers.unix
* -- news scheme for USENET news groups and articles
* telnet://melvyl.ucop.edu/
* -- telnet scheme for interactive services via the TELNET Protocol
*
* Please, notice that there are many modifications from URL(RFC 1738) and
* relative URL(RFC 1808).
*
* The expressions for a URI
*
* For escaped URI forms
* - URI(char[]) // constructor
* - char[] getRawXxx() // method
* - String getEscapedXxx() // method
* - String toString() // method
*
* For unescaped URI forms
* - URI(String) // constructor
* - String getXXX() // method
*
*
* @author Sung-Gu
* @author Mike Bowler
* @version $Revision: 564973 $ $Date: 2002/03/14 15:14:01
*/
public class URI {
/**
* BitSet for within the userinfo component like user and password.
*/
public static final BitSet within_userinfo = new BitSet(256);
/**
* BitSet for control.
*/
public static final BitSet control = new BitSet(256);
/**
* BitSet for space.
*/
public static final BitSet space = new BitSet(256);
/**
* BitSet for delims.
*/
public static final BitSet delims = new BitSet(256);
/**
* BitSet for unwise.
*/
public static final BitSet unwise = new BitSet(256);
/**
* Disallowed rel_path before escaping.
*/
public static final BitSet disallowed_rel_path = new BitSet(256);
/**
* Disallowed opaque_part before escaping.
*/
public static final BitSet disallowed_opaque_part = new BitSet(256);
/**
* Those characters that are allowed for the authority component.
*/
public static final BitSet allowed_authority = new BitSet(256);
/**
* Those characters that are allowed for the opaque_part.
*/
public static final BitSet allowed_opaque_part = new BitSet(256);
/**
* Those characters that are allowed for the reg_name.
*/
public static final BitSet allowed_reg_name = new BitSet(256);
/**
* Those characters that are allowed for the userinfo component.
*/
public static final BitSet allowed_userinfo = new BitSet(256);
/**
* Those characters that are allowed for within the userinfo component.
*/
public static final BitSet allowed_within_userinfo = new BitSet(256);
/**
* Those characters that are allowed for the IPv6reference component.
* The characters '[', ']' in IPv6reference should be excluded.
*/
public static final BitSet allowed_IPv6reference = new BitSet(256);
/**
* Those characters that are allowed for the host component.
* The characters '[', ']' in IPv6reference should be excluded.
*/
public static final BitSet allowed_host = new BitSet(256);
/**
* Those characters that are allowed for the authority component.
*/
public static final BitSet allowed_within_authority = new BitSet(256);
/**
* Those characters that are allowed for the abs_path.
*/
public static final BitSet allowed_abs_path = new BitSet(256);
/**
* Those characters that are allowed for the rel_path.
*/
public static final BitSet allowed_rel_path = new BitSet(256);
/**
* Those characters that are allowed within the path.
*/
public static final BitSet allowed_within_path = new BitSet(256);
/**
* Those characters that are allowed for the query component.
*/
public static final BitSet allowed_query = new BitSet(256);
/**
* Those characters that are allowed within the query component.
*/
public static final BitSet allowed_within_query = new BitSet(256);
/**
* Those characters that are allowed for the fragment component.
*/
public static final BitSet allowed_fragment = new BitSet(256);
/**
* The percent "%" character always has the reserved purpose of being the
* escape indicator, it must be escaped as "%25" in order to be used as
* data within a URI.
*/
protected static final BitSet percent = new BitSet(256);
/**
* BitSet for digit.
*
* digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" |
* "8" | "9"
*
*/
protected static final BitSet digit = new BitSet(256);
/**
* BitSet for alpha.
*
* alpha = lowalpha | upalpha
*
*/
protected static final BitSet alpha = new BitSet(256);
/**
* BitSet for alphanum (join of alpha & digit).
*
* alphanum = alpha | digit
*
*/
protected static final BitSet alphanum = new BitSet(256);
/**
* BitSet for hex.
*
* hex = digit | "A" | "B" | "C" | "D" | "E" | "F" |
* "a" | "b" | "c" | "d" | "e" | "f"
*
*/
protected static final BitSet hex = new BitSet(256);
/**
* BitSet for escaped.
*
* escaped = "%" hex hex
*
*/
protected static final BitSet escaped = new BitSet(256);
/**
* BitSet for mark.
*
* mark = "-" | "_" | "." | "!" | "~" | "*" | "'" |
* "(" | ")"
*
*/
protected static final BitSet mark = new BitSet(256);
/**
* Data characters that are allowed in a URI but do not have a reserved
* purpose are called unreserved.
*
* unreserved = alphanum | mark
*
*/
protected static final BitSet unreserved = new BitSet(256);
/**
* BitSet for reserved.
*
* reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" |
* "$" | ","
*
*/
protected static final BitSet reserved = new BitSet(256);
/**
* BitSet for uric.
*
* uric = reserved | unreserved | escaped
*
*/
protected static final BitSet uric = new BitSet(256);
/**
* BitSet for fragment (alias for uric).
*
* fragment = *uric
*
*/
protected static final BitSet fragment = uric;
/**
* BitSet for query (alias for uric).
*
* query = *uric
*
*/
protected static final BitSet query = uric;
/**
* BitSet for pchar.
*
* pchar = unreserved | escaped |
* ":" | "@" | "&" | "=" | "+" | "$" | ","
*
*/
protected static final BitSet pchar = new BitSet(256);
/**
* BitSet for param (alias for pchar).
*
* param = *pchar
*
*/
protected static final BitSet param = pchar;
/**
* BitSet for segment.
*
* segment = *pchar *( ";" param )
*
*/
protected static final BitSet segment = new BitSet(256);
/**
* BitSet for path segments.
*
* path_segments = segment *( "/" segment )
*
*/
protected static final BitSet path_segments = new BitSet(256);
/**
* URI absolute path.
*
* abs_path = "/" path_segments
*
*/
protected static final BitSet abs_path = new BitSet(256);
/**
* URI bitset for encoding typical non-slash characters.
*
* uric_no_slash = unreserved | escaped | ";" | "?" | ":" | "@" |
* "&" | "=" | "+" | "$" | ","
*
*/
protected static final BitSet uric_no_slash = new BitSet(256);
/**
* URI bitset that combines uric_no_slash and uric.
*
* opaque_part = uric_no_slash *uric
*
*/
protected static final BitSet opaque_part = new BitSet(256);
/**
* URI bitset that combines absolute path and opaque part.
*
* path = [ abs_path | opaque_part ]
*
*/
protected static final BitSet path = new BitSet(256);
/**
* Port, a logical alias for digit.
*/
protected static final BitSet port = digit;
/**
* Bitset that combines digit and dot fo IPv$address.
*
* IPv4address = 1*digit "." 1*digit "." 1*digit "." 1*digit
*
*/
protected static final BitSet IPv4address = new BitSet(256);
/**
* RFC 2373.
*
* IPv6address = hexpart [ ":" IPv4address ]
*
*/
protected static final BitSet IPv6address = new BitSet(256);
/**
* RFC 2732, 2373.
*
* IPv6reference = "[" IPv6address "]"
*
*/
protected static final BitSet IPv6reference = new BitSet(256);
/**
* BitSet for toplabel.
*
* toplabel = alpha | alpha *( alphanum | "-" ) alphanum
*
*/
protected static final BitSet toplabel = new BitSet(256);
/**
* BitSet for hostname.
*
* hostname = *( domainlabel "." ) toplabel [ "." ]
*
*/
protected static final BitSet hostname = new BitSet(256);
/**
* BitSet for host.
*
* host = hostname | IPv4address | IPv6reference
*
*/
protected static final BitSet host = new BitSet(256);
/**
* BitSet for hostport.
*
* hostport = host [ ":" port ]
*
*/
protected static final BitSet hostport = new BitSet(256);
/**
* Bitset for userinfo.
*
* userinfo = *( unreserved | escaped |
* ";" | ":" | "&" | "=" | "+" | "$" | "," )
*
*/
protected static final BitSet userinfo = new BitSet(256);
/**
* Bitset for server.
*
* server = [ [ userinfo "@" ] hostport ]
*
*/
protected static final BitSet server = new BitSet(256);
/**
* BitSet for reg_name.
*
* reg_name = 1*( unreserved | escaped | "$" | "," |
* ";" | ":" | "@" | "&" | "=" | "+" )
*
*/
protected static final BitSet reg_name = new BitSet(256);
/**
* BitSet for authority.
*
* authority = server | reg_name
*
*/
protected static final BitSet authority = new BitSet(256);
/**
* BitSet for scheme.
*
* scheme = alpha *( alpha | digit | "+" | "-" | "." )
*
*/
protected static final BitSet scheme = new BitSet(256);
/**
* BitSet for rel_segment.
*
* rel_segment = 1*( unreserved | escaped |
* ";" | "@" | "&" | "=" | "+" | "$" | "," )
*
*/
protected static final BitSet rel_segment = new BitSet(256);
/**
* BitSet for rel_path.
*
* rel_path = rel_segment [ abs_path ]
*
*/
protected static final BitSet rel_path = new BitSet(256);
/**
* BitSet for net_path.
*
* net_path = "//" authority [ abs_path ]
*
*/
protected static final BitSet net_path = new BitSet(256);
/**
* BitSet for hier_part.
*
* hier_part = ( net_path | abs_path ) [ "?" query ]
*
*/
protected static final BitSet hier_part = new BitSet(256);
/**
* BitSet for relativeURI.
*
* relativeURI = ( net_path | abs_path | rel_path ) [ "?" query ]
*
*/
protected static final BitSet relativeURI = new BitSet(256);
/**
* BitSet for absoluteURI.
*
* absoluteURI = scheme ":" ( hier_part | opaque_part )
*
*/
protected static final BitSet absoluteURI = new BitSet(256);
/**
* BitSet for URI-reference.
*
* URI-reference = [ absoluteURI | relativeURI ] [ "#" fragment ]
*
*/
protected static final BitSet URI_reference = new BitSet(256);
// Static initializer for percent
static {
percent.set('%');
}
// Static initializer for digit
static {
for (int i = '0'; i <= '9'; i++) {
digit.set(i);
}
}
// Static initializer for alpha
static {
for (int i = 'a'; i <= 'z'; i++) {
alpha.set(i);
}
for (int i = 'A'; i <= 'Z'; i++) {
alpha.set(i);
}
}
// Static initializer for alphanum
static {
alphanum.or(alpha);
alphanum.or(digit);
}
// Static initializer for hex
static {
hex.or(digit);
for (int i = 'a'; i <= 'f'; i++) {
hex.set(i);
}
for (int i = 'A'; i <= 'F'; i++) {
hex.set(i);
}
}
// Static initializer for escaped
static {
escaped.or(percent);
escaped.or(hex);
}
// Static initializer for mark
static {
mark.set('-');
mark.set('_');
mark.set('.');
mark.set('!');
mark.set('~');
mark.set('*');
mark.set('\'');
mark.set('(');
mark.set(')');
}
// Static initializer for unreserved
static {
unreserved.or(alphanum);
unreserved.or(mark);
}
// Static initializer for reserved
static {
reserved.set(';');
reserved.set('/');
reserved.set('?');
reserved.set(':');
reserved.set('@');
reserved.set('&');
reserved.set('=');
reserved.set('+');
reserved.set('$');
reserved.set(',');
}
// Static initializer for uric
static {
uric.or(reserved);
uric.or(unreserved);
uric.or(escaped);
}
// Static initializer for pchar
static {
pchar.or(unreserved);
pchar.or(escaped);
pchar.set(':');
pchar.set('@');
pchar.set('&');
pchar.set('=');
pchar.set('+');
pchar.set('$');
pchar.set(',');
}
// Static initializer for segment
static {
segment.or(pchar);
segment.set(';');
segment.or(param);
}
// Static initializer for path_segments
static {
path_segments.set('/');
path_segments.or(segment);
}
// Static initializer for abs_path
static {
abs_path.set('/');
abs_path.or(path_segments);
}
// Static initializer for uric_no_slash
static {
uric_no_slash.or(unreserved);
uric_no_slash.or(escaped);
uric_no_slash.set(';');
uric_no_slash.set('?');
uric_no_slash.set(';');
uric_no_slash.set('@');
uric_no_slash.set('&');
uric_no_slash.set('=');
uric_no_slash.set('+');
uric_no_slash.set('$');
uric_no_slash.set(',');
}
// Static initializer for opaque_part
static {
// it's generous. because first character must not include a slash
opaque_part.or(uric_no_slash);
opaque_part.or(uric);
}
// Static initializer for path
static {
path.or(abs_path);
path.or(opaque_part);
}
// ---------------------------- Characters disallowed within the URI syntax
// Excluded US-ASCII Characters are like control, space, delims and unwise
// Static initializer for IPv4address
static {
IPv4address.or(digit);
IPv4address.set('.');
}
// Static initializer for IPv6address reference
static {
IPv6address.or(hex); // hexpart
IPv6address.set(':');
IPv6address.or(IPv4address);
}
// Static initializer for IPv6reference
static {
IPv6reference.set('[');
IPv6reference.or(IPv6address);
IPv6reference.set(']');
}
// Static initializer for toplabel
static {
toplabel.or(alphanum);
toplabel.set('-');
}
// Static initializer for hostname
static {
hostname.or(toplabel);
// hostname.or(domainlabel);
hostname.set('.');
}
// Static initializer for host
static {
host.or(hostname);
// host.or(IPv4address);
host.or(IPv6reference); // IPv4address
}
// Static initializer for hostport
static {
hostport.or(host);
hostport.set(':');
hostport.or(port);
}
// Static initializer for userinfo
static {
userinfo.or(unreserved);
userinfo.or(escaped);
userinfo.set(';');
userinfo.set(':');
userinfo.set('&');
userinfo.set('=');
userinfo.set('+');
userinfo.set('$');
userinfo.set(',');
}
// Static initializer for within_userinfo
static {
within_userinfo.or(userinfo);
within_userinfo.clear(';'); // reserved within authority
within_userinfo.clear(':');
within_userinfo.clear('@');
within_userinfo.clear('?');
within_userinfo.clear('/');
}
// Static initializer for server
static {
server.or(userinfo);
server.set('@');
server.or(hostport);
}
// Static initializer for reg_name
static {
reg_name.or(unreserved);
reg_name.or(escaped);
reg_name.set('$');
reg_name.set(',');
reg_name.set(';');
reg_name.set(':');
reg_name.set('@');
reg_name.set('&');
reg_name.set('=');
reg_name.set('+');
}
// Static initializer for authority
static {
authority.or(server);
authority.or(reg_name);
}
// ----------------------- Characters allowed within and for each component
// Static initializer for scheme
static {
scheme.or(alpha);
scheme.or(digit);
scheme.set('+');
scheme.set('-');
scheme.set('.');
}
// Static initializer for rel_segment
static {
rel_segment.or(unreserved);
rel_segment.or(escaped);
rel_segment.set(';');
rel_segment.set('@');
rel_segment.set('&');
rel_segment.set('=');
rel_segment.set('+');
rel_segment.set('$');
rel_segment.set(',');
}
// Static initializer for rel_path
static {
rel_path.or(rel_segment);
rel_path.or(abs_path);
}
// Static initializer for net_path
static {
net_path.set('/');
net_path.or(authority);
net_path.or(abs_path);
}
// Static initializer for hier_part
static {
hier_part.or(net_path);
hier_part.or(abs_path);
// hier_part.set('?'); aleady included
hier_part.or(query);
}
// Static initializer for relativeURI
static {
relativeURI.or(net_path);
relativeURI.or(abs_path);
relativeURI.or(rel_path);
// relativeURI.set('?'); aleady included
relativeURI.or(query);
}
// Static initializer for absoluteURI
static {
absoluteURI.or(scheme);
absoluteURI.set(':');
absoluteURI.or(hier_part);
absoluteURI.or(opaque_part);
}
// Static initializer for URI_reference
static {
URI_reference.or(absoluteURI);
URI_reference.or(relativeURI);
URI_reference.set('#');
URI_reference.or(fragment);
}
// Static initializer for control
static {
for (int i = 0; i <= 0x1F; i++) {
control.set(i);
}
control.set(0x7F);
}
// Static initializer for space
static {
space.set(0x20);
}
// Static initializer for delims
static {
delims.set('<');
delims.set('>');
delims.set('#');
delims.set('%');
delims.set('"');
}
// Static initializer for unwise
static {
unwise.set('{');
unwise.set('}');
unwise.set('|');
unwise.set('\\');
unwise.set('^');
unwise.set('[');
unwise.set(']');
unwise.set('`');
}
// Static initializer for disallowed_rel_path
static {
disallowed_rel_path.or(uric);
disallowed_rel_path.andNot(rel_path);
}
// Static initializer for disallowed_opaque_part
static {
disallowed_opaque_part.or(uric);
disallowed_opaque_part.andNot(opaque_part);
}
// Static initializer for allowed_authority
static {
allowed_authority.or(authority);
allowed_authority.clear('%');
}
// Static initializer for allowed_opaque_part
static {
allowed_opaque_part.or(opaque_part);
allowed_opaque_part.clear('%');
}
// Static initializer for allowed_reg_name
static {
allowed_reg_name.or(reg_name);
// allowed_reg_name.andNot(percent);
allowed_reg_name.clear('%');
}
// Static initializer for allowed_userinfo
static {
allowed_userinfo.or(userinfo);
// allowed_userinfo.andNot(percent);
allowed_userinfo.clear('%');
}
// Static initializer for allowed_within_userinfo
static {
allowed_within_userinfo.or(within_userinfo);
allowed_within_userinfo.clear('%');
}
// Static initializer for allowed_IPv6reference
static {
allowed_IPv6reference.or(IPv6reference);
// allowed_IPv6reference.andNot(unwise);
allowed_IPv6reference.clear('[');
allowed_IPv6reference.clear(']');
}
// Static initializer for allowed_host
static {
allowed_host.or(hostname);
allowed_host.or(allowed_IPv6reference);
}
// Static initializer for allowed_within_authority
static {
allowed_within_authority.or(server);
allowed_within_authority.or(reg_name);
allowed_within_authority.clear(';');
allowed_within_authority.clear(':');
allowed_within_authority.clear('@');
allowed_within_authority.clear('?');
allowed_within_authority.clear('/');
}
// Static initializer for allowed_abs_path
static {
allowed_abs_path.or(abs_path);
// allowed_abs_path.set('/'); // aleady included
allowed_abs_path.andNot(percent);
allowed_abs_path.clear('+');
}
// Static initializer for allowed_rel_path
static {
allowed_rel_path.or(rel_path);
allowed_rel_path.clear('%');
allowed_rel_path.clear('+');
}
// Static initializer for allowed_within_path
static {
allowed_within_path.or(abs_path);
allowed_within_path.clear('/');
allowed_within_path.clear(';');
allowed_within_path.clear('=');
allowed_within_path.clear('?');
}
// Static initializer for allowed_query
static {
allowed_query.or(uric);
allowed_query.clear('%');
}
// Static initializer for allowed_within_query
static {
allowed_within_query.or(allowed_query);
allowed_within_query.andNot(reserved); // excluded 'reserved'
}
// Static initializer for allowed_fragment
static {
allowed_fragment.or(uric);
allowed_fragment.clear('%');
}
// ------------------------------------------ Character and escape encoding
/**
* Encodes URI string.
*
* This is a two mapping, one from original characters to octets, and
* subsequently a second from octets to URI characters:
*
* original character sequence->octet sequence->URI character sequence
*
*
* An escaped octet is encoded as a character triplet, consisting of the
* percent character "%" followed by the two hexadecimal digits
* representing the octet code. For example, "%20" is the escaped
* encoding for the US-ASCII space character.
*
* Conversion from the local filesystem character set to UTF-8 will
* normally involve a two step process. First convert the local character
* set to the UCS; then convert the UCS to UTF-8.
* The first step in the process can be performed by maintaining a mapping
* table that includes the local character set code and the corresponding
* UCS code.
* The next step is to convert the UCS character code to the UTF-8 encoding.
*
* Mapping between vendor codepages can be done in a very similar manner
* as described above.
*
* The only time escape encodings can allowedly be made is when a URI is
* being created from its component parts. The escape and validate methods
* are internally performed within this method.
*
* @param original the original character sequence
* @param allowed those characters that are allowed within a component
* @param charset the protocol charset
* @return URI character sequence
* @throws HttpException null component or unsupported character encoding
*/
protected static char[] encode(String original, BitSet allowed,
String charset) throws HttpException {
if (original == null) {
throw new IllegalArgumentException("Original string may not be null");
}
if (allowed == null) {
throw new IllegalArgumentException("Allowed bitset may not be null");
}
byte[] rawdata = URLCodec.encodeUrl(allowed, EncodingUtils.getBytes(original, charset));
return EncodingUtils.getAsciiString(rawdata).toCharArray();
}
/**
* Decodes URI encoded string.
*
* This is a two mapping, one from URI characters to octets, and
* subsequently a second from octets to original characters:
*
* URI character sequence->octet sequence->original character sequence
*
*
* A URI must be separated into its components before the escaped
* characters within those components can be allowedly decoded.
*
* Notice that there is a chance that URI characters that are non UTF-8
* may be parsed as valid UTF-8. A recent non-scientific analysis found
* that EUC encoded Japanese words had a 2.7% false reading; SJIS had a
* 0.0005% false reading; other encoding such as ASCII or KOI-8 have a 0%
* false reading.
*
* The percent "%" character always has the reserved purpose of being
* the escape indicator, it must be escaped as "%25" in order to be used
* as data within a URI.
*
* The unescape method is internally performed within this method.
*
* @param component the URI character sequence
* @param charset the protocol charset
* @return original character sequence
* @throws HttpException incomplete trailing escape pattern or unsupported
* character encoding
*/
protected static String decode(char[] component, String charset)
throws HttpException {
if (component == null) {
throw new IllegalArgumentException("Component array of chars may not be null");
}
return decode(new String(component), charset);
}
/**
* Decodes URI encoded string.
*
* This is a two mapping, one from URI characters to octets, and
* subsequently a second from octets to original characters:
*
* URI character sequence->octet sequence->original character sequence
*
*
* A URI must be separated into its components before the escaped
* characters within those components can be allowedly decoded.
*
* Notice that there is a chance that URI characters that are non UTF-8
* may be parsed as valid UTF-8. A recent non-scientific analysis found
* that EUC encoded Japanese words had a 2.7% false reading; SJIS had a
* 0.0005% false reading; other encoding such as ASCII or KOI-8 have a 0%
* false reading.
*
* The percent "%" character always has the reserved purpose of being
* the escape indicator, it must be escaped as "%25" in order to be used
* as data within a URI.
*
* The unescape method is internally performed within this method.
*
* @param component the URI character sequence
* @param charset the protocol charset
* @return original character sequence
* @throws HttpException incomplete trailing escape pattern or unsupported
* character encoding
* @since 3.0
*/
protected static String decode(String component, String charset)
throws HttpException {
if (component == null) {
throw new IllegalArgumentException("Component array of chars may not be null");
}
byte[] rawdata = null;
try {
rawdata = URLCodec.decodeUrl(EncodingUtils.getAsciiBytes(component));
} catch (DecoderException e) {
throw new HttpException(e.getMessage());
}
return EncodingUtils.getString(rawdata, charset);
}
}