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POHow to achieve mp3 stream using java Servlet
 

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  1. POHow to achieve mp3 stream using java Servlet
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    <p>Goal: build a servlet so that when I type <strong>http://xxx.com/servpage?a.mp3</strong> in browser, I can instantaneously start the playing of this mp3 file. Previously if I put the file on goDaddy as a static file, I can do that. My software can play it right away.</p> <p>Using Servlet, I can ignore what is after ?, just want this page to return the mp3 dynamically (because in the future I may return any other files). What I got is a long wait (>20 seconds), and then got the player to play it.</p> <p>I followed some examples, and noticed "attachment" in the example. However, if I remove it, the mp3 won't got played even. I am usign Google App Engine though, but just use the input/outputstream to return the http request. Anyone can help?</p> <pre><code>public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException ,IOException { res.setContentType("audio/mpeg3"); OutputStream os = res.getOutputStream(); res.setHeader("Content-Disposition", "attachment; filename="" + "a.mp3";"); res.setContentLength(1000000); FileService fileService = FileServiceFactory.getFileService(); boolean lockForRead = false; String filename = "/gs/" + BUCKETNAME + "/" + FILENAME; AppEngineFile readableFile = new AppEngineFile(filename); try{ FileReadChannel readChannel = fileService.openReadChannel(readableFile, lockForRead); InputStream is = Channels.newInputStream(readChannel); int BUFF_SIZE = 1024; byte[] buffer = new byte[BUFF_SIZE]; try { do { int byteCount = is.read(buffer); if (byteCount == -1) break; os.write(buffer, 0, byteCount); os.flush(); } while (true); } catch (Exception excp) { } finally { os.close(); is.close(); } readChannel.close(); } catch(Exception e){ } } </code></pre>
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