slash.navigation.rest.ReadRequest.java Source code

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Here is the source code for slash.navigation.rest.ReadRequest.java

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/*
This file is part of RouteConverter.
    
RouteConverter is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
    
RouteConverter is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with RouteConverter; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    
Copyright (C) 2007 Christian Pesch. All Rights Reserved.
*/
package slash.navigation.rest;

import org.apache.http.client.methods.HttpRequestBase;

import java.io.IOException;
import java.text.ParseException;
import java.util.Calendar;

import static org.apache.http.HttpHeaders.*;
import static slash.common.io.Transfer.parseLong;
import static slash.navigation.rest.RFC2616.formatDate;
import static slash.navigation.rest.RFC2616.parseDate;

/**
 * Wrapper for a HTTP HEAD or GET Request.
 *
 * @author Christian Pesch
 */

abstract class ReadRequest extends HttpRequest {
    public ReadRequest(HttpRequestBase method) {
        super(method);
    }

    public boolean getAcceptByteRanges() throws IOException {
        return "bytes".equals(getHeader(ACCEPT_RANGES));
    }

    public Long getContentLength() throws IOException {
        return parseLong(getHeader(CONTENT_LENGTH));
    }

    public Long getLastModified() throws IOException {
        String lastModified = getHeader(LAST_MODIFIED);
        if (lastModified == null)
            return null;

        try {
            Calendar calendar = parseDate(lastModified);
            return calendar.getTimeInMillis();
        } catch (ParseException e) {
            throw new IOException("Cannot parse last modified: " + lastModified, e);
        }
    }

    public String getETag() throws IOException {
        return getHeader(ETAG);
    }

    public void setIfModifiedSince(long modifiedSince) {
        String ifModifiedSince = formatDate(modifiedSince);
        setHeader(IF_MODIFIED_SINCE, ifModifiedSince);
    }

    public void setIfNoneMatch(String eTag) {
        setHeader(IF_NONE_MATCH, eTag);
    }
}