Home | History | Annotate | Download | only in webkit 
      1 /*
      2  * Copyright (C) 2007 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.webkit;
     18 
     19 import android.net.http.EventHandler;
     20 
     21 import com.android.internal.R;
     22 
     23 import java.io.ByteArrayInputStream;
     24 
     25 import libcore.io.Base64;
     26 
     27 /**
     28  * This class is a concrete implementation of StreamLoader that uses the
     29  * content supplied as a URL as the source for the stream. The mimetype
     30  * optionally provided in the URL is extracted and inserted into the HTTP
     31  * response headers.
     32  */
     33 class DataLoader extends StreamLoader {
     34 
     35     /**
     36      * Constructor uses the dataURL as the source for an InputStream
     37      * @param dataUrl data: URL string optionally containing a mimetype
     38      * @param loadListener LoadListener to pass the content to
     39      */
     40     DataLoader(String dataUrl, LoadListener loadListener) {
     41         super(loadListener);
     42 
     43         String url = dataUrl.substring("data:".length());
     44         byte[] data = null;
     45         int commaIndex = url.indexOf(',');
     46         if (commaIndex != -1) {
     47             String contentType = url.substring(0, commaIndex);
     48             data = url.substring(commaIndex + 1).getBytes();
     49             loadListener.parseContentTypeHeader(contentType);
     50             if ("base64".equals(loadListener.transferEncoding())) {
     51                 data = Base64.decode(data);
     52             }
     53         } else {
     54             data = url.getBytes();
     55         }
     56         if (data != null) {
     57             mDataStream = new ByteArrayInputStream(data);
     58             mContentLength = data.length;
     59         }
     60     }
     61 
     62     @Override
     63     protected boolean setupStreamAndSendStatus() {
     64         if (mDataStream != null) {
     65             mLoadListener.status(1, 1, 200, "OK");
     66             return true;
     67         } else {
     68             mLoadListener.error(EventHandler.ERROR,
     69                     mContext.getString(R.string.httpError));
     70             return false;
     71         }
     72     }
     73 
     74     @Override
     75     protected void buildHeaders(android.net.http.Headers h) {
     76     }
     77 }
     78