com.rabbitmq.http.client.Utils Maven / Gradle / Ivy
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/*
* Copyright 2018 the original author or authors.
*
* Licensed 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 com.rabbitmq.http.client;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.util.BitSet;
/**
*
*/
class Utils {
private static final Charset CHARSET_UTF8 = Charset.forName("UTF-8");
/* from https://github.com/apache/httpcomponents-client/commit/b58e7d46d75e1d3c42f5fd6db9bd45f32a49c639#diff-a74b24f025e68ec11e4550b42e9f807d */
static String encodePath(String content, Charset charset) {
final StringBuilder buf = new StringBuilder();
final ByteBuffer bb = charset.encode(content);
while (bb.hasRemaining()) {
final int b = bb.get() & 0xff;
if (PATHSAFE.get(b)) {
buf.append((char) b);
} 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();
}
static String encode(String content) {
return encodePath(content, CHARSET_UTF8);
}
private static final int RADIX = 16;
/**
* Unreserved characters, i.e. alphanumeric, plus: {@code _ - ! . ~ ' ( ) *}
*
* 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);
// here we want to encode the segment separator, because we encode segment by segment
// 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);
}
/* end of from https://github.com/apache/httpcomponents-client/commit/b58e7d46d75e1d3c42f5fd6db9bd45f32a49c639#diff-a74b24f025e68ec11e4550b42e9f807d */
}