com.marvin.webvox.FetchUrlMimeType.java Source code

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Here is the source code for com.marvin.webvox.FetchUrlMimeType.java

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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.marvin.webvox;

import android.content.ContentValues;
import android.net.Uri;
//import android.net.http.AndroidHttpClient;

import org.apache.http.HttpResponse;
import org.apache.http.Header;
import org.apache.http.client.methods.HttpHead;

import java.io.IOException;

import android.os.AsyncTask;
//import android.provider.Downloads;
import android.webkit.MimeTypeMap;
import android.webkit.URLUtil;

/**
 * This class is used to pull down the http headers of a given URL so that
 * we can analyse the mimetype and make any correction needed before we give
 * the URL to the download manager. The ContentValues class holds the
 * content that would be provided to the download manager, so that on
 * completion of checking the mimetype, we can issue the download to
 * the download manager.
 * This operation is needed when the user long-clicks on a link or image and
 * we don't know the mimetype. If the user just clicks on the link, we will
 * do the same steps of correcting the mimetype down in
 * android.os.webkit.LoadListener rather than handling it here.
 *
 */
class FetchUrlMimeType extends AsyncTask<ContentValues, String, String> {

    BrowserActivity mActivity;
    ContentValues mValues;

    public FetchUrlMimeType(BrowserActivity activity) {
        mActivity = activity;
    }

    @Override
    public String doInBackground(ContentValues... values) {
        mValues = values[0];
        /*
                // Check to make sure we have a URI to download
                String uri = mValues.getAsString(Downloads.COLUMN_URI);
                if (uri == null || uri.length() == 0) {
        return null;
                }
            
                // User agent is likely to be null, though the AndroidHttpClient
                // seems ok with that.
                AndroidHttpClient client = AndroidHttpClient.newInstance(
            mValues.getAsString(Downloads.COLUMN_USER_AGENT));
                HttpHead request = new HttpHead(uri);
            
                String cookie = mValues.getAsString(Downloads.COLUMN_COOKIE_DATA);
                if (cookie != null && cookie.length() > 0) {
        request.addHeader("Cookie", cookie);
                }
            
                String referer = mValues.getAsString(Downloads.COLUMN_REFERER);
                if (referer != null && referer.length() > 0) {
        request.addHeader("Referer", referer);
                }
            
                HttpResponse response;
                String mimeType = null;
                try {
        response = client.execute(request);
        // We could get a redirect here, but if we do lets let
        // the download manager take care of it, and thus trust that
        // the server sends the right mimetype
        if (response.getStatusLine().getStatusCode() == 200) {
            Header header = response.getFirstHeader("Content-Type");
            if (header != null) {
                mimeType = header.getValue();
                final int semicolonIndex = mimeType.indexOf(';');
                if (semicolonIndex != -1) {
                    mimeType = mimeType.substring(0, semicolonIndex);
                }
            }
        }
                } catch (IllegalArgumentException ex) {
        request.abort();
                } catch (IOException ex) {
        request.abort();
                } finally {
        client.close();
                }
            
                return mimeType;
        */
        return "";
    }

    @Override
    public void onPostExecute(String mimeType) {
        /*       
               if (mimeType != null) {
                   String url = mValues.getAsString(Downloads.COLUMN_URI);
                   if (mimeType.equalsIgnoreCase("text/plain") ||
               mimeType.equalsIgnoreCase("application/octet-stream")) {
           String newMimeType =
                   MimeTypeMap.getSingleton().getMimeTypeFromExtension(
                       MimeTypeMap.getFileExtensionFromUrl(url));
           if (newMimeType != null) {
               mValues.put(Downloads.COLUMN_MIME_TYPE, newMimeType);
           }
                   }
                   String filename = URLUtil.guessFileName(url,
               null, mimeType);
                   mValues.put(Downloads.COLUMN_FILE_NAME_HINT, filename);
               }
            
               // Start the download
               final Uri contentUri =
                   mActivity.getContentResolver().insert(Downloads.CONTENT_URI, mValues);
               mActivity.viewDownloads(contentUri);
        */
    }

}