Transferring sound file/blob from user interface to Servlet for storage on server

Question

Transferring sound file/blob from user interface to Servlet for storage on server

I am struggling to successfully send our audio file from the UI using the provided code snippet:

var url = (window.URL || window.webkitURL).createObjectURL(blob);
var link = document.getElementById("save");
link.href = url;
link.download = filename || 'output.wav';

var fd = new FormData();
fd.append('fname', 'sample1.wav');
fd.append('data', blob);
$.ajax({
    type: 'POST',
    url: 'AudioToText',
    data: fd,
    processData: false,
    contentType: "audio/wav"
});

We are facing difficulties in processing this on the servlet side. I would appreciate any assistance with JavaScript code for sending an audio file to a servlet, as well as the servlet code necessary to save that audio file on the server. Thank you in advance.

javascript java ajax servlets

Answer 1

Answer №1

Hello there!

If you're looking to enable file uploads on your website, consider using the plugin File Upload by Blueimp. You can find more information about it here.

For detailed instructions on how to integrate this plugin with Spring and AJAX, check out this resource: here (from the plugin's wiki).

Here's a quick tutorial to get you started:

<label>Name</label>
    <form name="fileupload" method="POST" class="newSongUpload" action="upload.new.song" id="uploadNewFile">
    <!--in action - your url --!>
                    <input type="text" name="songName">
                        <i class="glyphicon glyphicon-plus"></i>
                            <input type="file" name="files" id="upload-new-document" accept="your accept here">


         </form>
</div>

To integrate this in your project, use the following JS code:

$(function () {
            $('.newSongUpload').fileupload({
                multipart: true,
                dataType: 'json'//just add this line to make the plugin work
                //Customize the behavior after uploading in done:yourcode and define acceptable file types in accept:your types
            })
        });

And for handling the file upload in Java Spring, you can use this code snippet:

  @RequestMapping(value = {"/upload.new.song"}, method = RequestMethod.POST)
public @ResponseBody HashMap<String, String> uploadNewSong(HttpServletResponse response,
                                 @RequestParam("file") MultipartFile file){
//Your logic for handling the file, such as saving it to the database or file system using file.getBytes() function
}

I trust this information will be useful for you. Happy coding!

Answer 2

Hello there!

If you're looking to enable file uploads on your website, consider using the plugin File Upload by Blueimp. You can find more information about it here.

For detailed instructions on how to integrate this plugin with Spring and AJAX, check out this resource: here (from the plugin's wiki).

Here's a quick tutorial to get you started:

<label>Name</label>
    <form name="fileupload" method="POST" class="newSongUpload" action="upload.new.song" id="uploadNewFile">
    <!--in action - your url --!>
                    <input type="text" name="songName">
                        <i class="glyphicon glyphicon-plus"></i>
                            <input type="file" name="files" id="upload-new-document" accept="your accept here">


         </form>
</div>

To integrate this in your project, use the following JS code:

$(function () {
            $('.newSongUpload').fileupload({
                multipart: true,
                dataType: 'json'//just add this line to make the plugin work
                //Customize the behavior after uploading in done:yourcode and define acceptable file types in accept:your types
            })
        });

And for handling the file upload in Java Spring, you can use this code snippet:

  @RequestMapping(value = {"/upload.new.song"}, method = RequestMethod.POST)
public @ResponseBody HashMap<String, String> uploadNewSong(HttpServletResponse response,
                                 @RequestParam("file") MultipartFile file){
//Your logic for handling the file, such as saving it to the database or file system using file.getBytes() function
}

I trust this information will be useful for you. Happy coding!

Answer 3

Answer №2

In order to handle uploaded files in Servlet, the files need to be sent as a request attribute of "multipart/form-data" using the POST method.

For more information, you can check out the example provided by Oracle.

Reference : http://docs.oracle.com/javaee/6/tutorial/doc/glraq.html

Answer 4

In order to handle uploaded files in Servlet, the files need to be sent as a request attribute of "multipart/form-data" using the POST method.

For more information, you can check out the example provided by Oracle.

Reference : http://docs.oracle.com/javaee/6/tutorial/doc/glraq.html

Transferring sound file/blob from user interface to Servlet for storage on server

Answer №1

Answer №2

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