Multi-Part Decoding Examples

Receiving an Uploaded File

Recieving a file from the web browser is fairly easy. There are two steps to adding the ability to upload a file in your web application. It requires properly formatting the HTML to add the file element, and it requires fetching the assosicated File out of the HTTPRequest.

    <form name="GZIPUpload" enctype="multipart/form-data" action="$$.ServletPath." method=POST>

    <input type=file name="GZIPFile">
    <input type=submit value="Test GZIP" name="Upload">
    </form>

    As you can see the encoding type on the form the FILE element is located in set to multi-part encoding. This is absolutely critical. If the encoding on the form is not set to multi-part encoding only the file name will be uploaded; and not the file itself.

    When the file is uploaded to Apollo, it will be decoded and stored in the HTTPRequest object by the name of the file element. Use the getFile(String) method of the HTTPRequest object to fetch the HTTPFile object. Each HTTPFile request object has three pieces of data in it, the File name of the file uploaded, the Mime-type of the file uploaded, and the file data itself. This data is set from what the browser transmits, and there is no guarantee that all three values will be available (however all browsers seem to send all three). The mime-type of the uploaded file is set by the browser, and not apollo. The uploaded file is stored in memory in a String. Large ungarbage collected files may adversely effect your memory management system; be sure to not allow lingering references so garbage collection can function properly.

 

Examples from demo Site:
GZIPBroker