    001// Copyright 2010-2013 The Apache Software Foundation
    002//
    003// Licensed under the Apache License, Version 2.0 (the "License");
    004// you may not use this file except in compliance with the License.
    005// You may obtain a copy of the License at
    006//
    007// http://www.apache.org/licenses/LICENSE-2.0
    008//
    009// Unless required by applicable law or agreed to in writing, software
    010// distributed under the License is distributed on an "AS IS" BASIS,
    011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012// See the License for the specific language governing permissions and
    013// limitations under the License.
    014
    015package org.apache.tapestry5.internal.services.assets;
    016
    017import org.apache.tapestry5.SymbolConstants;
    018import org.apache.tapestry5.http.services.BaseURLSource;
    019import org.apache.tapestry5.http.services.Request;
    020import org.apache.tapestry5.ioc.annotations.Symbol;
    021import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    022import org.apache.tapestry5.services.AssetPathConverter;
    023import org.apache.tapestry5.services.PathConstructor;
    024import org.apache.tapestry5.services.assets.AssetPathConstructor;
    025import org.apache.tapestry5.services.assets.CompressionStatus;
    026import org.apache.tapestry5.services.assets.StreamableResource;
    027
    028import java.io.IOException;
    029
    030public class AssetPathConstructorImpl implements AssetPathConstructor
    031{
    032    private final Request request;
    033
    034    private final String prefix;
    035
    036    private final BaseURLSource baseURLSource;
    037
    038    private final AssetPathConverter pathConverter;
    039
    040    private final boolean fullyQualified;
    041
    042    public AssetPathConstructorImpl(Request request,
    043                                    BaseURLSource baseURLSource,
    044
    045                                    @Symbol(SymbolConstants.ASSET_URL_FULL_QUALIFIED)
    046                                    boolean fullyQualified,
    047
    048                                    @Symbol(SymbolConstants.ASSET_PATH_PREFIX)
    049                                    String uncompressedAssetPrefix,
    050
    051                                    PathConstructor pathConstructor,
    052
    053                                    AssetPathConverter pathConverter)
    054    {
    055        this.request = request;
    056        this.baseURLSource = baseURLSource;
    057
    058        this.fullyQualified = fullyQualified;
    059        this.pathConverter = pathConverter;
    060
    061        prefix = pathConstructor.constructClientPath(uncompressedAssetPrefix, "");
    062    }
    063
    064    public String constructAssetPath(String virtualFolder, String path, StreamableResource resource) throws IOException
    065    {
    066        assert InternalUtils.isNonBlank(path);
    067
    068        assert InternalUtils.isNonBlank(virtualFolder);
    069
    070        StringBuilder builder = new StringBuilder();
    071
    072        if (fullyQualified)
    073        {
    074            builder.append(baseURLSource.getBaseURL(request.isSecure()));
    075        }
    076
    077        builder.append(prefix);
    078        builder.append(virtualFolder);
    079        builder.append('/');
    080
    081        // The 'z' prefix indicates a compressed resource.
    082
    083        if (resource.getCompression() == CompressionStatus.COMPRESSED)
    084        {
    085            builder.append('z');
    086        }
    087
    088        builder.append(resource.getChecksum());
    089        builder.append('/');
    090        builder.append(path);
    091
    092        return pathConverter.convertAssetPath(builder.toString());
    093    }
    094
    095}