17b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira/** 27b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * Copyright (c) 2010, Google Inc. 37b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * 47b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * Licensed under the Apache License, Version 2.0 (the "License"); 57b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * you may not use this file except in compliance with the License. 67b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * You may obtain a copy of the License at 77b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * 87b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * http://www.apache.org/licenses/LICENSE-2.0 97b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * 107b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * Unless required by applicable law or agreed to in writing, software 117b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * distributed under the License is distributed on an "AS IS" BASIS, 127b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 137b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * See the License for the specific language governing permissions and 147b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * limitations under the License. 157b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira */ 1630e2c24b056542f3b1b438aeb798305d1226d0c8Andy Huangpackage com.android.mail.utils; 177b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira 187b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereiraimport android.content.Context; 197b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereiraimport android.content.Intent; 207b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereiraimport android.content.pm.PackageManager; 217b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereiraimport android.content.pm.ResolveInfo; 227b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereiraimport android.net.Uri; 23b5d3874d41da961fa58adbeb9e6ba171261472cePaul Westbrookimport android.text.TextUtils; 24b5d3874d41da961fa58adbeb9e6ba171261472cePaul Westbrookimport android.webkit.MimeTypeMap; 257b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira 267b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereiraimport com.google.common.annotations.VisibleForTesting; 27b5d3874d41da961fa58adbeb9e6ba171261472cePaul Westbrookimport com.google.common.collect.ImmutableSet; 287b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira 297b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereiraimport java.util.List; 307b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereiraimport java.util.Set; 317b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira 327b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira/** 3388fc42e48ee4e927eb77e5cab23f2f5151cac649Andy Huang * Utilities for working with different content types within Mail. 347b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira */ 357b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereirapublic class MimeType { 36b5d3874d41da961fa58adbeb9e6ba171261472cePaul Westbrook private static final String LOG_TAG = LogTag.getLogTag(); 37b5d3874d41da961fa58adbeb9e6ba171261472cePaul Westbrook 387b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira public static final String ANDROID_ARCHIVE = "application/vnd.android.package-archive"; 397b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira private static final String TEXT_PLAIN = "text/plain"; 407b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira @VisibleForTesting 417b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira static final String GENERIC_MIMETYPE = "application/octet-stream"; 427b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira 437b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira @VisibleForTesting 448d4791ce70b3f71cc90256bc4b5b236379b56331Andrew Sapperstein private static final Set<String> EML_ATTACHMENT_CONTENT_TYPES = ImmutableSet.of( 45376294bbb5ded471ad577fdb492875a837021d08Andrew Sapperstein "message/rfc822", "application/eml"); 46f86e023107de3647d6c862cc6d6b45a3d7887e77Andrew Sapperstein public static final String EML_ATTACHMENT_CONTENT_TYPE = "message/rfc822"; 477b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira private static final String NULL_ATTACHMENT_CONTENT_TYPE = "null"; 487b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira 497b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira /** 507b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * Returns whether or not an attachment of the specified type is installable (e.g. an apk). 517b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira */ 527b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira public static boolean isInstallable(String type) { 537b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira return ANDROID_ARCHIVE.equals(type); 547b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } 557b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira 567b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira /** 577b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * Returns whether or not an attachment of the specified type is viewable. 587b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira */ 598750066b10f80e2a8080016973b3296d76d18266Mark Wei public static boolean isViewable(Context context, Uri contentUri, String contentType) { 607b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira // The provider returns a contentType of "null" instead of null, when the 617b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira // content type is not known. Changing the provider to return null, 627b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira // breaks other areas that will need to be fixed in a later CL. 637b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira // Bug 2922948 has been written up to track this 647b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira if (contentType == null || contentType.length() == 0 || 657b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira NULL_ATTACHMENT_CONTENT_TYPE.equals(contentType)) { 66b5d3874d41da961fa58adbeb9e6ba171261472cePaul Westbrook LogUtils.d(LOG_TAG, "Attachment with null content type. '%s", contentUri); 677b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira return false; 687b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } 697b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira 70b5d3874d41da961fa58adbeb9e6ba171261472cePaul Westbrook final Intent mimetypeIntent = new Intent(Intent.ACTION_VIEW); 71b5d3874d41da961fa58adbeb9e6ba171261472cePaul Westbrook mimetypeIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION 72b5d3874d41da961fa58adbeb9e6ba171261472cePaul Westbrook | Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 73b5d3874d41da961fa58adbeb9e6ba171261472cePaul Westbrook 7422283e78ade4e89b5465fb6ed14774d90fd277b5Paul Westbrook if (contentUri != null) { 758750066b10f80e2a8080016973b3296d76d18266Mark Wei Utils.setIntentDataAndTypeAndNormalize(mimetypeIntent, contentUri, contentType); 7622283e78ade4e89b5465fb6ed14774d90fd277b5Paul Westbrook } else { 77127c9358332d7c3a9a2ead697c16b48641bf84f3Tony Mantler // Fake a reasonable looking URI so that intent filters that specify a scheme will match 78127c9358332d7c3a9a2ead697c16b48641bf84f3Tony Mantler final Uri dummyUri = Uri.parse("content://" + context.getPackageName()); 79127c9358332d7c3a9a2ead697c16b48641bf84f3Tony Mantler Utils.setIntentDataAndTypeAndNormalize(mimetypeIntent, dummyUri, contentType); 8022283e78ade4e89b5465fb6ed14774d90fd277b5Paul Westbrook } 817b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira 827b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira PackageManager manager; 837b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira // We need to catch the exception to make CanvasConversationHeaderView 847b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira // test pass. Bug: http://b/issue?id=3470653. 857b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira try { 867b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira manager = context.getPackageManager(); 877b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } catch (UnsupportedOperationException e) { 887b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira return false; 897b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } 90b5d3874d41da961fa58adbeb9e6ba171261472cePaul Westbrook final List<ResolveInfo> list = manager.queryIntentActivities(mimetypeIntent, 91b5d3874d41da961fa58adbeb9e6ba171261472cePaul Westbrook PackageManager.MATCH_DEFAULT_ONLY); 929faf88ab9c0a36b097c671f8ab4154f8390742a7Paul Westbrook if (list.size() == 0) { 939faf88ab9c0a36b097c671f8ab4154f8390742a7Paul Westbrook // This logging will help track down bug 7092215. Once that bug is resolved, remove 949faf88ab9c0a36b097c671f8ab4154f8390742a7Paul Westbrook // this. 959faf88ab9c0a36b097c671f8ab4154f8390742a7Paul Westbrook LogUtils.w(LOG_TAG, "Unable to find supporting activity. " + 969faf88ab9c0a36b097c671f8ab4154f8390742a7Paul Westbrook "mime-type: %s, uri: %s, normalized mime-type: %s normalized uri: %s", 979faf88ab9c0a36b097c671f8ab4154f8390742a7Paul Westbrook contentType, contentUri, mimetypeIntent.getType(), mimetypeIntent.getData()); 989faf88ab9c0a36b097c671f8ab4154f8390742a7Paul Westbrook } 997b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira return list.size() > 0; 1007b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } 1017b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira 1027b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira /** 1037b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * Extract and return filename's extension, converted to lower case, and not including the "." 1047b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * 1057b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * @return extension, or null if not found (or null/empty filename) 1067b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira */ 1077b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira private static String getFilenameExtension(String fileName) { 1087b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira String extension = null; 1097b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira if (!TextUtils.isEmpty(fileName)) { 1107b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira int lastDot = fileName.lastIndexOf('.'); 1117b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira if ((lastDot > 0) && (lastDot < fileName.length() - 1)) { 1127b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira extension = fileName.substring(lastDot + 1).toLowerCase(); 1137b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } 1147b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } 1157b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira return extension; 1167b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } 1177b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira 1187b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira 1197b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira /** 1207b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * Returns the mime type of the attachment based on its name and 1217b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * original mime type. This is an workaround for bugs where Gmail 1227b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * server doesn't set content-type for certain types correctly. 123f86e023107de3647d6c862cc6d6b45a3d7887e77Andrew Sapperstein * 1) EML files -> "message/rfc822". 1247b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * @param name name of the attachment. 1257b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * @param mimeType original mime type of the attachment. 1267b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira * @return the inferred mime type of the attachment. 1277b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira */ 1287b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira public static String inferMimeType(String name, String mimeType) { 1297b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira final String extension = getFilenameExtension(name); 1307b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira if (TextUtils.isEmpty(extension)) { 1317b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira // Attachment doesn't have extension, just return original mime 1327b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira // type. 1337b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira return mimeType; 1347b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } else { 1357b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira final boolean isTextPlain = TEXT_PLAIN.equalsIgnoreCase(mimeType); 1367b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira final boolean isGenericType = 1377b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira isTextPlain || GENERIC_MIMETYPE.equalsIgnoreCase(mimeType); 1387b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira 1397b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira String type = null; 1407b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira if (isGenericType || TextUtils.isEmpty(mimeType)) { 1417b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira type = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension); 1427b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } 1437b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira if (!TextUtils.isEmpty(type)) { 1447b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira return type; 1457b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } if (extension.equals("eml")) { 146f86e023107de3647d6c862cc6d6b45a3d7887e77Andrew Sapperstein // Extension is ".eml", return mime type "message/rfc822" 1477b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira return EML_ATTACHMENT_CONTENT_TYPE; 1487b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } else { 1497b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira // Extension is not ".eml", just return original mime type. 1507b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira return !TextUtils.isEmpty(mimeType) ? mimeType : GENERIC_MIMETYPE; 1517b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } 1527b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } 1537b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira } 1548d4791ce70b3f71cc90256bc4b5b236379b56331Andrew Sapperstein 1558d4791ce70b3f71cc90256bc4b5b236379b56331Andrew Sapperstein /** 1568d4791ce70b3f71cc90256bc4b5b236379b56331Andrew Sapperstein * Checks the supplied mime type to determine if it is a valid eml file. 1578d4791ce70b3f71cc90256bc4b5b236379b56331Andrew Sapperstein * Valid mime types are "message/rfc822" and "application/eml". 1588d4791ce70b3f71cc90256bc4b5b236379b56331Andrew Sapperstein * @param mimeType the mime type to check 1598d4791ce70b3f71cc90256bc4b5b236379b56331Andrew Sapperstein * @return {@code true} if the mime type is one of the valid mime types. 1608d4791ce70b3f71cc90256bc4b5b236379b56331Andrew Sapperstein */ 1618d4791ce70b3f71cc90256bc4b5b236379b56331Andrew Sapperstein public static boolean isEmlMimeType(String mimeType) { 1628d4791ce70b3f71cc90256bc4b5b236379b56331Andrew Sapperstein return EML_ATTACHMENT_CONTENT_TYPES.contains(mimeType); 1638d4791ce70b3f71cc90256bc4b5b236379b56331Andrew Sapperstein } 1647b56a61174eeb202eea468b7f68b79729737ded2Mindy Pereira} 165