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/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package Parser;
import java.util.HashMap;
import javax.swing.JOptionPane;
/**
*
* @author sven
*/
public class UrlAnalyzer {
public static final String PROTOCOL_HTTP = "http";
public static final String PROTOCOL_HTTPS = "https";
public static final String PROTOCOL_FTP = "ftp";
public static final String PROTOCOL_FILE = "file";
public static final String NO_PROTOCOL = "NO_PROTOCOL";
public static final String NO_HOST = "NO_HOST";
public static final String NO_VALID_PATH = "NO_VALID_PATH";
public static final String NO_VALID_FILE = "NO_VALID_FILE";
public static final String PROTOCOL_SEPARATOR = "://";
public static final String PATH_SEPARATOR = "/";
public static final String PARAMS_INDICATOR = "?";
public static final String ANCHOR = "#";
public static final String PARAMS_SEPARATOR = "&";
public static final String PARAMS_ASSIGN = "=";
public static final String[] VALID_PROTOCOLS =
{PROTOCOL_HTTP,PROTOCOL_HTTPS,PROTOCOL_FTP,PROTOCOL_FILE};
public static final String NO_ANCHOR = "NO_ANCHOR";
public static HashMap<String, String> getParams(String url) {
HashMap<String,String> result = new HashMap<String,String>();
if(url!=null) {
String paramStr = url.substring(url.indexOf(PARAMS_INDICATOR)+1);
String[] params = paramStr.split(PARAMS_SEPARATOR);
for(String param : params) {
String[] paramKeyValue = param.split(PARAMS_ASSIGN);
if (paramKeyValue.length > 1) {
result.put(paramKeyValue[0], paramKeyValue[1]);
} else {
result.put(paramKeyValue[0],null);
}
}
}
return result;
}
public static final String getProtocol(final String url) {
if(url==null)
return NO_PROTOCOL;
for (String proto : VALID_PROTOCOLS) {
if (url.startsWith(proto)) {
return proto;
}
}
return new String(NO_PROTOCOL);
}
public static final String getHostname(final String url) {
if(url==null)
return NO_HOST;
if (!url.contains(PROTOCOL_SEPARATOR)) {
return NO_HOST;
}
int hostStart = url.indexOf(PROTOCOL_SEPARATOR)+PROTOCOL_SEPARATOR.length();
int hostEnd = url.indexOf(PATH_SEPARATOR, hostStart);
if ( hostEnd <= 1 ) {
return NO_HOST;
}
return url.substring(hostStart, hostEnd);
}
public static final String getFilename(final String url) {
if(url==null)
return "";
String rest = url;
if (url.contains(PROTOCOL_SEPARATOR)) {
int protoEnd = url.indexOf(PROTOCOL_SEPARATOR)+PROTOCOL_SEPARATOR.length();
rest = url.substring(protoEnd);
if ( (rest.indexOf(PATH_SEPARATOR)) == -1) {
return NO_VALID_FILE;
}
rest = url.substring(protoEnd);
}
int fileStart = rest.lastIndexOf(PATH_SEPARATOR);
String res = (fileStart != -1) ? rest.substring(fileStart+1) : rest;
if (hasParams(res)) {
res = res.substring(0, res.indexOf(PARAMS_INDICATOR));
}
if (hasAnchor(res)) {
res = res.substring(0, res.indexOf(ANCHOR));
}
return res;
}
public static final String getPath(String url) {
if(url==null)
return NO_VALID_PATH;
int pathStart = 0;
int pathEnd = url.lastIndexOf(PATH_SEPARATOR);
if (pathEnd < 1) {
// item at root level
// e. g. foobar.html oder cool.gifv
return PATH_SEPARATOR;
}
if (url.contains(PROTOCOL_SEPARATOR)) {
// we have a full url
// e.g. http://foo.bar.com/dir/subdir/index.html
pathStart = url.indexOf(PATH_SEPARATOR,url.indexOf(PROTOCOL_SEPARATOR)+PROTOCOL_SEPARATOR.length());
if (pathStart < 0) {
return NO_VALID_PATH;
}
} else {
// we have a relative path on site
// e. g.: img/coolimg.jpg
// or res/img/anotherimg.gif
pathStart = 0;
pathEnd = url.lastIndexOf(PATH_SEPARATOR);
}
return url.substring(pathStart,pathEnd)+PATH_SEPARATOR;
}
public static final String getAnchor(String url) {
if(url==null)
return NO_ANCHOR;
return (hasAnchor(url)) ? url.substring(url.indexOf(ANCHOR)+1) : null;
}
public static final boolean hasParams(String url) {
if(url==null)
return false;
return url.contains(PARAMS_INDICATOR);
}
public static final boolean hasAnchor(String url) {
if(url==null)
return false;
return url.contains(ANCHOR);
}
public static final String stripProtocol(String url) {
return url.substring(url.indexOf(PROTOCOL_SEPARATOR)+PROTOCOL_SEPARATOR.length());
}
public static final boolean validateURL(String url)
{
if( url.contains(PROTOCOL_HTTP) || url.contains(PROTOCOL_HTTPS) || url.contains(PROTOCOL_FTP) || url.contains(PROTOCOL_FILE) )
if(url.contains(PROTOCOL_SEPARATOR))
if(url.contains("."))
return true;
JOptionPane.showMessageDialog(null, "Falsche Url. Bitte geben Sie eine korrekte Url ein!");
return false;
}
}
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