Fix unicode write file issue #73

src/android/src/main/java/com/RNFetchBlob/RNFetchBlobFS.java

                         }
                         FileInputStream fin = new FileInputStream(src);
                         byte [] buffer = new byte [10240];
-                        int read = fin.read(buffer);
-                        written = read;
-                        while(read > 0) {
+                        int read;
+                        written = 0;
+                        while((read = fin.read(buffer)) > 0) {
                             fout.write(buffer, 0, read);
-                            read = fin.read(buffer);
                             written += read;
                         }
                         fin.close();
             byte [] b = Base64.decode(data, Base64.NO_WRAP);
             if(encoding.toLowerCase().contains("urlencode")) {
                 try {
-                    b = URLDecoder.decode(new String(b), "UTF-8").getBytes();
-                } catch (UnsupportedEncodingException e) {
+                    String encoded = URLDecoder.decode(new String(b), "UTF-8");
+                    b = encoded.getBytes();
+                } catch (Exception e) {
                     e.printStackTrace();
                 }
             }

src/android/src/main/java/com/RNFetchBlob/RNFetchBlobReq.java

     public boolean reportUploadProgress = false;
 
     public RNFetchBlobReq(ReadableMap options, String taskId, String method, String url, ReadableMap headers, String body, ReadableArray arrayBody, final Callback callback) {
-        this.method = method;
+        this.method = method.toUpperCase();
         this.options = new RNFetchBlobConfig(options);
         this.taskId = taskId;
         this.url = url;
                         String dest = RNFetchBlobFS.getTmpPath(ctx, taskId);
                         InputStream ins = resp.body().byteStream();
                         FileOutputStream os = new FileOutputStream(new File(dest));
+                        int read;
                         byte [] buffer = new byte[10240];
-                        int read = ins.read(buffer);
-                        os.write(buffer,0,read);
-                        while(read > 0) {
-                            os.write(buffer,0,read);
-                            read = ins.read(buffer);
+                        while ((read = ins.read(buffer)) != -1) {
+                            os.write(buffer, 0, read);
                         }
                         ins.close();
+                        os.flush();
                         os.close();
                         callback.invoke(null, null, dest);
                     }

src/ios/RNFetchBlobFS.m

             if([encoding containsString:@"urlencode"])
             {
                 NSString * decode = [[[NSString alloc] initWithData:content encoding:NSUTF8StringEncoding] stringByRemovingPercentEncoding];
-                content = [decode dataUsingEncoding:NSUTF8StringEncoding];
+                if(decode != nil)
+                {
+                    content = [decode dataUsingEncoding:NSUTF8StringEncoding];
+                }
             }
         }
         else if([encoding isEqualToString:@"uri"]) {