package org.lesscss;

import java.io.IOException;

import java.io.InputStream;

import java.net.URI;

import java.net.URISyntaxException;

import java.net.URL;

import java.net.URLConnection;

public class HttpResource implements Resource {

URI url;

public HttpResource(String url) throws URISyntaxException {

this.url = new URI( url );

}

public HttpResource(URI url) {

this.url = url;

}

public boolean exists() {

try {

URL u = url.toURL();

URLConnection connection = u.openConnection();

connection.connect();

return true;

} catch (IOException e) {

return false;

}

}

public long lastModified() {

try {

URL u = url.toURL();

URLConnection connection = u.openConnection();

return connection.getLastModified();

} catch( IOException e ) {

return 0;

}

}

public InputStream getInputStream() throws IOException {

return url.toURL().openStream();

}

public Resource createRelative(String relativeResourcePath) throws IOException {

try {

return new HttpResource(url.resolve(new URI(relativeResourcePath)));

} catch (URISyntaxException e) {

throw (IOException)new IOException( "Could not resolve " + url + " against " + relativeResourcePath ).initCause(e);

}

}

public String getName() {

return url.toASCIIString();

}

}