org.usergrid.services.assets.data.AssetUtils.java Source code

Introduction

Here is the source code for org.usergrid.services.assets.data.AssetUtils.java

Source

package org.usergrid.services.assets.data;

import java.text.ParseException;
import java.util.Date;
import java.util.UUID;

import org.apache.commons.lang.time.DateUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.usergrid.persistence.entities.Asset;
import org.usergrid.utils.StringUtils;

import com.google.common.base.Preconditions;

/**
 * @author zznate
 */
public class AssetUtils {
    private static Logger logger = LoggerFactory.getLogger(AssetUtils.class);

    public static final String CONTENT_TYPE = "content-type";
    public static final String CONTENT_LENGTH = "content-length";
    public static final String CONTENT_DISPOSITION = "content-disposition";
    public static final String E_TAG = "etag";
    public static final String CHECKSUM = "checksum";

    /**
     * Returns the key for the bucket in the following form:
     * [appId]/[{@link org.usergrid.persistence.entities.Asset#getPath()}
     * @param appId
     * @param asset
     * @return
     */
    public static String buildAssetKey(UUID appId, Asset asset) {
        Preconditions.checkArgument(asset.getUuid() != null, "The asset provided to buildAssetKey had a null UUID");
        Preconditions.checkArgument(appId != null, "The appId provided to buildAssetKey was null");
        return appId.toString().concat("/").concat(asset.getUuid().toString());
    }

    /**
     * Attempt to parse the Date from a Date-based header, primarily If-Modified-Since
     * @param headerValue
     * @return
     */
    public static Date fromIfModifiedSince(String headerValue) {
        Date moded = null;
        if (!StringUtils.isEmpty(headerValue)) {
            try {
                moded = DateUtils.parseDate(headerValue, DEFAULT_PATTERNS);
            } catch (ParseException pe) {
                logger.error("Could not parse date format from If-Modified-Since header: " + headerValue);
            }
        }
        return moded;
    }

    /***
     * The following yanked from org.apache.http.impl.cookie.DateUtils, Apache 2.0 License
     ***/

    /**
     * Date format pattern used to parse HTTP date headers in RFC 1123 format.
     */
    public static final String PATTERN_RFC1123 = "EEE, dd MMM yyyy HH:mm:ss zzz";

    /**
     * Date format pattern used to parse HTTP date headers in RFC 1036 format.
     */
    public static final String PATTERN_RFC1036 = "EEEE, dd-MMM-yy HH:mm:ss zzz";

    /**
     * Date format pattern used to parse HTTP date headers in ANSI C
     * <code>asctime()</code> format.
     */
    public static final String PATTERN_ASCTIME = "EEE MMM d HH:mm:ss yyyy";

    public static final String[] DEFAULT_PATTERNS = new String[] { PATTERN_RFC1036, PATTERN_RFC1123,
            PATTERN_ASCTIME };
}