1 files changed, 129 insertions, 0 deletions
diff --git a/src/de/blinkt/openvpn/FileProvider.java b/src/de/blinkt/openvpn/FileProvider.java
new file mode 100644
index 00000000..1147ccf0
--- /dev/null
+++ b/src/de/blinkt/openvpn/FileProvider.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2011 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 de.blinkt.openvpn;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import android.content.ContentProvider;
+import android.content.ContentValues;
+import android.content.ContentProvider.PipeDataWriter;
+import android.content.res.AssetFileDescriptor;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+
+/**
+ * A very simple content provider that can serve arbitrary asset files from
+ * our .apk.
+ */
+public class FileProvider extends ContentProvider
+        implements PipeDataWriter<InputStream> {
+    @Override
+    public boolean onCreate() {
+        return true;
+    }
+
+    @Override
+    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
+            String sortOrder) {
+        // Don't support queries.
+        return null;
+    }
+
+    @Override
+    public Uri insert(Uri uri, ContentValues values) {
+        // Don't support inserts.
+        return null;
+    }
+
+    @Override
+    public int delete(Uri uri, String selection, String[] selectionArgs) {
+        // Don't support deletes.
+        return 0;
+    }
+
+    @Override
+    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
+        // Don't support updates.
+        return 0;
+    }
+
+    @Override
+    public String getType(Uri uri) {
+        // For this sample, assume all files are .apks.
+        return "application/octet-stream";
+    }
+
+    @Override
+    public AssetFileDescriptor openAssetFile(Uri uri, String mode) throws FileNotFoundException {
+        // Try to open an asset with the given name.
+    	String path = uri.getPath();
+    	if(path.startsWith("/"))
+    		path = path.replaceFirst("/", "");       
+    	
+    	// I think this already random enough, no need for magic secure cookies
+    	// 1f9563a4-a1f5-2165-255f2219-111823ef.dmp
+    	if (!path.matches("^[0-9a-z-.]*$"))
+    		throw new FileNotFoundException("url not in expect format " + uri);
+
+        try {
+        	
+        	File cachedir = getContext().getCacheDir();
+        	File dumpfile = new File(cachedir,path);
+            InputStream is = new FileInputStream(dumpfile);
+            // Start a new thread that pipes the stream data back to the caller.
+            return new AssetFileDescriptor(
+                    openPipeHelper(uri, null, null, is, this), 0,
+                    dumpfile.length());
+        } catch (IOException e) {
+            FileNotFoundException fnf = new FileNotFoundException("Unable to open minidump " + uri);
+            throw fnf;
+        }
+    }
+
+    @Override
+    public void writeDataToPipe(ParcelFileDescriptor output, Uri uri, String mimeType,
+            Bundle opts, InputStream args) {
+        // Transfer data from the asset to the pipe the client is reading.
+        byte[] buffer = new byte[8192];
+        int n;
+        FileOutputStream fout = new FileOutputStream(output.getFileDescriptor());
+        try {
+            while ((n=args.read(buffer)) >= 0) {
+                fout.write(buffer, 0, n);
+            }
+        } catch (IOException e) {
+            Log.i("OpenVPNFileProvider", "Failed transferring", e);
+        } finally {
+            try {
+                args.close();
+            } catch (IOException e) {
+            }
+            try {
+                fout.close();
+            } catch (IOException e) {
+            }
+        }
+    }
+}