org.eclipse.aether.transport.file.PathUtils Maven / Gradle / Ivy
/*
* 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.
*/
package org.eclipse.aether.transport.file;
/**
* URL handling for file URLs. Based on org.apache.maven.wagon.PathUtils.
*/
final class PathUtils {
private PathUtils() {}
/**
* Return the protocol name.
* E.g: for input http://www.codehause.org this method will return http
*
* @param url the url
* @return the host name
*/
public static String protocol(final String url) {
final int pos = url.indexOf(":");
if (pos == -1) {
return "";
}
return url.substring(0, pos).trim();
}
/**
* Derive the path portion of the given URL.
*
* @param url the file-repository URL
* @return the basedir of the repository
*/
public static String basedir(String url) {
String protocol = PathUtils.protocol(url);
String retValue = null;
if (protocol.length() > 0) {
retValue = url.substring(protocol.length() + 1);
} else {
retValue = url;
}
retValue = decode(retValue);
// special case: if omitted // on protocol, keep path as is
if (retValue.startsWith("//")) {
retValue = retValue.substring(2);
if (retValue.length() >= 2 && (retValue.charAt(1) == '|' || retValue.charAt(1) == ':')) {
// special case: if there is a windows drive letter, then keep the original return value
retValue = retValue.charAt(0) + ":" + retValue.substring(2);
} else {
// Now we expect the host
int index = retValue.indexOf("/");
if (index >= 0) {
retValue = retValue.substring(index + 1);
}
// special case: if there is a windows drive letter, then keep the original return value
if (retValue.length() >= 2 && (retValue.charAt(1) == '|' || retValue.charAt(1) == ':')) {
retValue = retValue.charAt(0) + ":" + retValue.substring(2);
} else if (index >= 0) {
// leading / was previously stripped
retValue = "/" + retValue;
}
}
}
// special case: if there is a windows drive letter using |, switch to :
if (retValue.length() >= 2 && retValue.charAt(1) == '|') {
retValue = retValue.charAt(0) + ":" + retValue.substring(2);
}
return retValue.trim();
}
/**
* Decodes the specified (portion of a) URL. Note: This decoder assumes that ISO-8859-1 is used to
* convert URL-encoded octets to characters.
*
* @param url The URL to decode, may be null.
* @return The decoded URL or null if the input was null.
*/
static String decode(String url) {
String decoded = url;
if (url != null) {
int pos = -1;
while ((pos = decoded.indexOf('%', pos + 1)) >= 0) {
if (pos + 2 < decoded.length()) {
String hexStr = decoded.substring(pos + 1, pos + 3);
char ch = (char) Integer.parseInt(hexStr, 16);
decoded = decoded.substring(0, pos) + ch + decoded.substring(pos + 3);
}
}
}
return decoded;
}
}