| /* |
| * 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.android.browser; |
| |
| import java.net.HttpURLConnection; |
| import java.net.URL; |
| |
| import android.app.DownloadManager; |
| import android.content.Context; |
| import android.os.Environment; |
| import android.util.Log; |
| import android.webkit.MimeTypeMap; |
| import android.webkit.URLUtil; |
| |
| import java.io.IOException; |
| |
| /** |
| * 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. |
| * 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 Thread { |
| |
| private final static String LOGTAG = "FetchUrlMimeType"; |
| |
| private Context mContext; |
| private DownloadManager.Request mRequest; |
| private String mUri; |
| private String mCookies; |
| private String mUserAgent; |
| |
| public FetchUrlMimeType(Context context, DownloadManager.Request request, |
| String uri, String cookies, String userAgent) { |
| mContext = context.getApplicationContext(); |
| mRequest = request; |
| mUri = uri; |
| mCookies = cookies; |
| mUserAgent = userAgent; |
| } |
| |
| @Override |
| public void run() { |
| String mimeType = null; |
| String contentDisposition = null; |
| HttpURLConnection connection = null; |
| try { |
| URL url = new URL(mUri); |
| connection = (HttpURLConnection) url.openConnection(); |
| connection.setRequestMethod("HEAD"); |
| |
| if (mUserAgent != null) { |
| connection.addRequestProperty("User-Agent", mUserAgent); |
| } |
| |
| if (mCookies != null && mCookies.length() > 0) { |
| connection.addRequestProperty("Cookie", mCookies); |
| } |
| |
| if (connection.getResponseCode() == 200) { |
| mimeType = connection.getContentType(); |
| if (mimeType != null) { |
| final int semicolonIndex = mimeType.indexOf(';'); |
| if (semicolonIndex != -1) { |
| mimeType = mimeType.substring(0, semicolonIndex); |
| } |
| } |
| |
| contentDisposition = connection.getHeaderField("Content-Disposition"); |
| } |
| } catch (IOException ioe) { |
| Log.e(LOGTAG,"Download failed: " + ioe); |
| } finally { |
| if (connection != null) { |
| connection.disconnect(); |
| } |
| } |
| |
| if (mimeType != null) { |
| if (mimeType.equalsIgnoreCase("text/plain") || |
| mimeType.equalsIgnoreCase("application/octet-stream")) { |
| String newMimeType = |
| MimeTypeMap.getSingleton().getMimeTypeFromExtension( |
| MimeTypeMap.getFileExtensionFromUrl(mUri)); |
| if (newMimeType != null) { |
| mimeType = newMimeType; |
| mRequest.setMimeType(newMimeType); |
| } |
| } |
| String filename = URLUtil.guessFileName(mUri, contentDisposition, |
| mimeType); |
| mRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, filename); |
| } |
| |
| // Start the download |
| DownloadManager manager = (DownloadManager) mContext.getSystemService( |
| Context.DOWNLOAD_SERVICE); |
| manager.enqueue(mRequest); |
| } |
| |
| } |