access local file from webview

Is it possible to upload a audio file recorded by native AVAudioRecorder in a webView?

Here is what I want to do:

1. send the audio file path to js:

NSString *path = audioFilePath;// like  
[jsContext evaluateScript:[NSString stringWithFormat:@"window.audioPath=%@", path]];

2. upload audio file to server in webView

Can I access the audio file in WebView?