1 files changed, 138 insertions, 0 deletions
diff --git a/src/org/thialfihar/android/apg/provider/ApgServiceBlobProvider.java b/src/org/thialfihar/android/apg/provider/ApgServiceBlobProvider.java
new file mode 100644
index 000000000..fd4145f4c
--- /dev/null
+++ b/src/org/thialfihar/android/apg/provider/ApgServiceBlobProvider.java
@@ -0,0 +1,138 @@
+package org.thialfihar.android.apg.provider;
+
+import org.thialfihar.android.apg.ApgService;
+import org.thialfihar.android.apg.Constants;
+
+import android.content.ContentProvider;
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.List;
+import java.util.UUID;
+
+public class ApgServiceBlobProvider extends ContentProvider {
+    
+    private static final String TAG = "ApgServiceBlobProvider";
+    
+    public static final Uri CONTENT_URI = Uri.parse("content://org.thialfihar.android.apg.provider.apgserviceblobprovider");
+    
+    private static final String COLUMN_KEY = "key";
+    
+    private static final String STORE_PATH = Constants.path.app_dir+"/ApgServiceBlobs";
+    
+    private ApgServiceBlobDatabase mDb = null;
+
+    public ApgServiceBlobProvider() {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "Constructor called");
+        File dir = new File(STORE_PATH);
+        dir.mkdirs();
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "Constructor finished");
+    }
+
+    @Override
+    public int delete(Uri arg0, String arg1, String[] arg2) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "delete() called");
+        // TODO Auto-generated method stub
+        return 0;
+    }
+
+    @Override
+    public String getType(Uri arg0) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "getType() called");
+        // not needed for now
+        return null;
+    }
+
+    @Override
+    public Uri insert(Uri uri, ContentValues ignored) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "insert() called");
+        // ContentValues are actually ignored, because we want to store a blob with no more information 
+        // but have to create an record with the password generated here first
+        
+        ContentValues vals = new ContentValues();
+        
+        // Insert a random key in the database. This has to provided by the caller when updating or
+        // getting the blob
+        String password = UUID.randomUUID().toString();
+        vals.put(COLUMN_KEY, password);
+        
+        Uri insertedUri = mDb.insert(vals);
+        return Uri.withAppendedPath(insertedUri, password);
+    }
+
+    @Override
+    public boolean onCreate() {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "onCreate() called");
+        mDb = new ApgServiceBlobDatabase(getContext());
+        // TODO Auto-generated method stub
+        return true;
+    }
+
+    @Override
+    public Cursor query(Uri arg0, String[] arg1, String arg2, String[] arg3, String arg4) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "query() called");
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    @Override
+    public int update(Uri arg0, ContentValues arg1, String arg2, String[] arg3) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "update() called");
+        // TODO Auto-generated method stub
+        return 0;
+    }
+    
+    @Override
+    public ParcelFileDescriptor openFile(Uri uri, String mode) throws SecurityException, FileNotFoundException {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "openFile() called");
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "... with uri: "+uri.toString());
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "... with mode: "+mode);
+        
+        List<String> segments = uri.getPathSegments();
+        if(segments.size() < 2) {
+            throw new SecurityException("Password not found in URI");
+        }
+        String id = segments.get(0);
+        String key = segments.get(1);
+        
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "... got id: "+id);
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "... and key: "+key);
+
+        // get the data
+        Cursor result = mDb.query(id, key);
+        
+        if(result.getCount() == 0) {
+            // either the key is wrong or no id exists
+            throw new FileNotFoundException("No file found with that ID and/or password");
+        }
+        
+        File targetFile = new File(STORE_PATH, id);
+        if(mode.equals("w")) {
+            if(ApgService.LOCAL_LOGD) Log.d(TAG, "... will try to open file w");
+            if( !targetFile.exists() ) {
+                try {
+                    targetFile.createNewFile();
+                } catch (IOException e) {
+                    Log.e(TAG, "... got IEOException on creating new file", e);
+                    throw new FileNotFoundException("Could not create file to write to");
+                }
+            }
+            return ParcelFileDescriptor.open(targetFile, ParcelFileDescriptor.MODE_WRITE_ONLY | ParcelFileDescriptor.MODE_TRUNCATE );
+        } else if(mode.equals("r")) {
+            if(ApgService.LOCAL_LOGD) Log.d(TAG, "... will try to open file r");
+            if( !targetFile.exists() ) {
+                throw new FileNotFoundException("Error: Could not find the file requested");
+            }
+            return ParcelFileDescriptor.open(targetFile, ParcelFileDescriptor.MODE_READ_ONLY);
+        }
+
+        return null;
+    }
+
+}