javascript – 将音频文件保存在rails中

我有简单的rails应用程序,我使用 HTML5音频web api与recorder.js录制语音,然后将其保存在应用程序服务器上.录音发生很好,我可以重播录音和听到声音,但当我在服务器上发布时,我的音频文件是空白的.

html / js代码

function stopRecording() {
            recorder.stop();
            recorder.exportWAV(function(s) {
                audio.src = window.URL.createObjectURL(s);
                sendWaveToPost(s);                  
            });
        }

function sendWaveToPost1(blob) {
            alert('in');
        var data = new FormData();

            data.append("audio",blob,(new Date()).getTime() + ".wav");

            var oReq = new XMLHttpRequest();
            oReq.open("POST","/audio/save_file");
            oReq.send(data);
            oReq.onload = function(oEvent) {
                if (oReq.status == 200) {
                    console.log("Uploaded");
                } else {
                    console.log("Error " + oReq.status + " occurred uploading your file.");
                }
            };
        }

控制器代码

def save_file
    audio = params[:audio]
    save_path = Rails.root.join("public/#{audio.original_filename}")

      # Open and write the file to file system.
      File.open(save_path,'wb') do |f|
        f.write params[:audio].read
      end

    render :text=> 'hi'
end

控制台日志

Parameters: {"audio"=>#<ActionDispatch::Http::UploadedFile:0xb61fea30   
@original_filename="1379157692066.wav",@content_type="audio/wav",@headers="Content-  
Disposition: form-data; name=\"audio\"; filename=\"1379157692066.wav\"\r\nContent-Type: 
audio/wav\r\n",@tempfile=#<File:/tmp/RackMultipart20130914-3587-tgwevx>>}

audio.rewind
        # Open and write the file to file system.
      File.open(save_path,'wb') do |f|
        f.write audio.read
      end