added download() to the filetransfer

framework/assets/js/filetransfer.js

@@ -83,6 +83,17 @@ FileTransfer.prototype.upload = function(filePath, server, successCallback, erro
     PhoneGap.exec(successCallback, errorCallback, 'FileTransfer', 'upload', [filePath, server, fileKey, fileName, mimeType, params, debug, chunkedMode]);
 };
 
+/**
+ * Downloads a file form a given URL and saves it to the specified directory.
+ * @param sourceUrl {String}          URL of the server to receive the file
+ * @param targetFile {String}         Full path of the file on the device
+ * @param successCallback (Function}  Callback to be invoked when upload has completed
+ * @param errorCallback {Function}    Callback to be invoked upon error
+ */
+FileTransfer.prototype.download = function(sourceUrl, targetFile, successCallback, errorCallback) {
+    PhoneGap.exec(successCallback, errorCallback, 'FileTransfer', 'download', [targetFile, sourceUrl]);
+};
+
 /**
  * Options to customize the HTTP request used to upload files.
  * @constructor

framework/src/com/phonegap/FileTransfer.java

@@ -20,8 +20,10 @@ package com.phonegap;
 
 import java.io.DataInputStream;
 import java.io.DataOutputStream;
+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 java.net.HttpURLConnection;
@@ -80,6 +82,8 @@ public class FileTransfer extends Plugin {
             return new PluginResult(PluginResult.Status.JSON_EXCEPTION, "Missing filename or server name");
         }
 
+        try {
+            if (action.equals("upload")) {
                 // Setup the options
                 String fileKey = null;
                 String fileName = null;
@@ -88,16 +92,16 @@ public class FileTransfer extends Plugin {
                 fileKey = getArgument(args, 2, "file");
                 fileName = getArgument(args, 3, "image.jpg");
                 mimeType = getArgument(args, 4, "image/jpeg");
-
-		try {
                 JSONObject params = args.optJSONObject(5);
                 boolean trustEveryone = args.optBoolean(6);
                 boolean chunkedMode = args.getBoolean(7);
-
-			if (action.equals("upload")) {
                 FileUploadResult r = upload(file, server, fileKey, fileName, mimeType, params, trustEveryone, chunkedMode);
                 Log.d(LOG_TAG, "****** About to return a result from upload");
                 return new PluginResult(PluginResult.Status.OK, r.toJSONObject());
+            } else if (action.equals("download")) {
+                String r = download(file, server);
+                Log.d(LOG_TAG, "****** About to return a result from download");
+                return new PluginResult(PluginResult.Status.OK, r);
             } else {
                 return new PluginResult(PluginResult.Status.INVALID_ACTION);
             }
@@ -362,6 +366,47 @@ public class FileTransfer extends Plugin {
         return result;
     }
 
+    /**
+     * Downloads a file form a given URL and saves it to the specified directory.
+     *
+     * @param server        URL of the server to receive the file
+     * @param file      	Full path of the file on the file system
+     * @return String 		containing the path to the downloaded file
+     */
+    public String download(String filePath, String sourceUrl) throws IOException {
+        try {
+            File file = new File(filePath);
+            file.getParentFile().mkdirs();
+
+            URL url = new URL(sourceUrl);
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            connection.setRequestMethod("GET");
+            connection.setDoOutput(true);
+            connection.connect();
+
+            Log.d(LOG_TAG, "Download file:" + url);
+
+            InputStream inputStream = connection.getInputStream();
+            byte[] buffer = new byte[1024];
+            int len1 = 0;
+
+            FileOutputStream outputStream = new FileOutputStream(file);
+
+            while ( (len1 = inputStream.read(buffer)) > 0 ) {
+                outputStream.write(buffer,0, len1);
+            }
+
+            outputStream.close();
+
+            Log.d(LOG_TAG, "Saved file: " + filePath);
+        } catch (IOException e) {
+            Log.d(LOG_TAG, e.getMessage(), e);
+            throw new IOException("Error while downloading");
+        }
+
+        return filePath;
+    }
+
     /**
      * Get an input stream based on file path or content:// uri
      *