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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.net;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author Simon Thoresen Hult
*/
public class Url {
private static final Pattern pattern = Pattern.compile(
//12 3 45 6 7 89 a b c d e f g h
// 2 1 5 76 4 a 9 cb 8 d fe hg
"^(([^:/?#]+):)?(//(([^:@/?#]+)(:([^@/?#]+))?@)?((\\[([^]]+)]|[^:/?#]+)(:([^/?#]+))?))?([^?#]+)?(\\?([^#]*))?(#(.*))?");
private final String image;
private final int schemeBegin;
private final int schemeEnd;
private final int userInfoBegin;
private final int userInfoEnd;
private final int passwordBegin;
private final int passwordEnd;
private final int hostBegin;
private final int hostEnd;
private final int portBegin;
private final int portEnd;
private final int pathBegin;
private final int pathEnd;
private final int queryBegin;
private final int queryEnd;
private final int fragmentBegin;
private final int fragmentEnd;
public Url(String scheme, String user, String password, String host, Integer port, String path, String query,
String fragment)
{
StringBuilder image = new StringBuilder();
schemeBegin = image.length();
if (scheme != null) {
image.append(scheme);
schemeEnd = image.length();
image.append(':');
} else {
schemeEnd = schemeBegin;
}
if (host != null) {
image.append("//");
}
userInfoBegin = image.length();
if (user != null) {
image.append(user);
userInfoEnd = image.length();
} else {
userInfoEnd = userInfoBegin;
}
if (password != null) {
image.append(':');
passwordBegin = image.length();
image.append(password);
passwordEnd = image.length();
} else {
passwordBegin = image.length();
passwordEnd = passwordBegin;
}
if (user != null || password != null) {
image.append('@');
}
if (host != null) {
boolean esc = host.indexOf(':') >= 0;
if (esc) {
image.append('[');
}
hostBegin = image.length();
image.append(host);
hostEnd = image.length();
if (esc) {
image.append(']');
}
} else {
hostBegin = image.length();
hostEnd = hostBegin;
}
if (port != null) {
image.append(':');
portBegin = image.length();
image.append(port);
portEnd = image.length();
} else {
portBegin = image.length();
portEnd = portBegin;
}
pathBegin = image.length();
if (path != null) {
image.append(path);
pathEnd = image.length();
} else {
pathEnd = pathBegin;
}
if (query != null) {
image.append('?');
queryBegin = image.length();
image.append(query);
queryEnd = image.length();
} else {
queryBegin = image.length();
queryEnd = queryBegin;
}
if (fragment != null) {
image.append("#");
fragmentBegin = image.length();
image.append(fragment);
fragmentEnd = image.length();
} else {
fragmentBegin = image.length();
fragmentEnd = fragmentBegin;
}
this.image = image.toString();
}
public static Url fromString(String image) {
Matcher matcher = pattern.matcher(image);
if (!matcher.matches()) {
throw new IllegalArgumentException("Malformed URL.");
}
String host = matcher.group(10);
if (host == null) {
host = matcher.group(9);
}
if (host == null) {
host = matcher.group(8);
}
String port = matcher.group(12);
return new Url(matcher.group(2), matcher.group(5), matcher.group(7), host,
port != null ? Integer.valueOf(port) : null, matcher.group(13), matcher.group(15),
matcher.group(17));
}
public int getSchemeBegin() {
return schemeBegin;
}
public int getSchemeEnd() {
return schemeEnd;
}
public int getUserInfoBegin() {
return userInfoBegin;
}
public int getUserInfoEnd() {
return userInfoEnd;
}
public int getPasswordBegin() {
return passwordBegin;
}
public int getPasswordEnd() {
return passwordEnd;
}
public int getHostBegin() {
return hostBegin;
}
public int getHostEnd() {
return hostEnd;
}
public int getPortBegin() {
return portBegin;
}
public int getPortEnd() {
return portEnd;
}
public int getPathBegin() {
return pathBegin;
}
public int getPathEnd() {
return pathEnd;
}
public int getQueryBegin() {
return queryBegin;
}
public int getQueryEnd() {
return queryEnd;
}
public int getFragmentBegin() {
return fragmentBegin;
}
public int getFragmentEnd() {
return fragmentEnd;
}
public String getScheme() {
return schemeBegin < schemeEnd ? image.substring(schemeBegin, schemeEnd) : null;
}
public String getUserInfo() {
return userInfoBegin < userInfoEnd ? image.substring(userInfoBegin, userInfoEnd) : null;
}
public String getPassword() {
return passwordBegin < passwordEnd ? image.substring(passwordBegin, passwordEnd) : null;
}
public String getHost() {
return hostBegin < hostEnd ? image.substring(hostBegin, hostEnd) : null;
}
public Integer getPort() {
String str = getPortString();
return str != null ? Integer.valueOf(str) : null;
}
public String getPortString() {
return portBegin < portEnd ? image.substring(portBegin, portEnd) : null;
}
public String getPath() {
return pathBegin < pathEnd ? image.substring(pathBegin, pathEnd) : null;
}
public String getQuery() {
return queryBegin < queryEnd ? image.substring(queryBegin, queryEnd) : null;
}
public String getFragment() {
return fragmentBegin < fragmentEnd ? image.substring(fragmentBegin, fragmentEnd) : null;
}
@Override
public int hashCode() {
return image.hashCode();
}
@Override
public boolean equals(Object obj) {
return (obj instanceof Url) && image.equals(((Url)obj).image);
}
@Override
public String toString() {
return image;
}
}
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