[Simpleweb-Support] HTTP Compression

[Carfield Y. <car...@ca...>]

Try to implement HTTP compression, it work fine at all browser I've
accessable: safari, firefox, opera, internet explorer. However, there
are still socket exception and I don't know why:


java.io.IOException: Stream closed
       at simple.http.MonitoredOutputStream.ensureOpen(Unknown Source)
       at simple.http.MonitoredOutputStream.write(Unknown Source)
       at simple.http.ResponseStream.write(Unknown Source)
       at java.util.zip.GZIPOutputStream.finish(GZIPOutputStream.java:95)
       at java.util.zip.DeflaterOutputStream.close(DeflaterOutputStream.jav=
a:141)
       at hk.com.carfield.web.simple.Controller.rawDisplay(Controller.java:=
126)
       at hk.com.carfield.web.simple.Controller.handleRequest(Controller.ja=
va:64)
       at hk.com.carfield.web.simple.Controller.process(Controller.java:137=
)
       at simple.http.serve.BasicResource.handle(Unknown Source)
       at simple.http.serve.ResourceProcessor.handle(Unknown Source)
       at simple.http.Dispatcher.run(Unknown Source)
       at simple.util.process.Daemon.execute(Unknown Source)
       at simple.util.process.Daemon.run(Unknown Source)

And method rawDisplay is just a method to show the file content directly:


=09private void rawDisplay(Response res, File location) throws IOException,
=09=09=09FileNotFoundException {
=09=09res.set("Content-Encoding", "gzip");
=09=09res.set("Vary", "Accept-Encoding");
=09=09if (location.isFile()) {
=09=09=09final InputStream is =3D new FileInputStream(location);
=09=09=09final OutputStream os =3D res.getOutputStream();
=09=09=09OutputStream gos =3D null;
=09=09=09try {
=09=09=09=09gos =3D new GZIPOutputStream(os);
=09=09=09=09final String mime =3D context.getMimeType(location.getName());
=09=09=09=09res.set("Content-Type", mime);
=09=09=09=09IOUtils.copy(is, gos);
=09=09=09} finally {
=09=09=09=09is.close();
=09=09=09=09if(gos !=3D null)
=09=09=09=09=09gos.close();
=09=09=09=09else
=09=09=09=09=09os.close();
=09=09=09}
=09=09}
=09}


The other exception is:

java.lang.RuntimeException: java.io.IOException: Stream closed
       at hk.com.carfield.web.simple.Controller.setDocument(Controller.java=
:100)
       at hk.com.carfield.web.simple.Controller.handleRequest(Controller.ja=
va:69)
       at hk.com.carfield.web.simple.Controller.process(Controller.java:137=
)
       at simple.http.serve.BasicResource.handle(Unknown Source)
       at simple.http.serve.ResourceProcessor.handle(Unknown Source)
       at simple.http.Dispatcher.run(Unknown Source)
       at simple.util.process.Daemon.execute(Unknown Source)
       at simple.util.process.Daemon.run(Unknown Source)
Caused by: java.io.IOException: Stream closed
       at simple.http.MonitoredOutputStream.ensureOpen(Unknown Source)
       at simple.http.MonitoredOutputStream.write(Unknown Source)
       at simple.http.ResponseStream.write(Unknown Source)
       at java.io.OutputStream.write(OutputStream.java:58)
       at java.util.zip.GZIPOutputStream.writeHeader(GZIPOutputStream.java:=
123)
       at java.util.zip.GZIPOutputStream.<init>(GZIPOutputStream.java:48)
       at java.util.zip.GZIPOutputStream.<init>(GZIPOutputStream.java:58)
       at hk.com.carfield.web.simple.Controller.setDocument(Controller.java=
:97)
       ... 7 more


=09private void setDocument(Response response,
=09=09=09Document document) throws IOException {
=09=09res.set("Content-Encoding", "gzip");
=09=09res.set("Vary", "Accept-Encoding");
=09=09final OutputStream os =3D response.getOutputStream();
=09=09OutputStream gos =3D null;
=09=09try {
=09=09=09gos =3D new GZIPOutputStream(os);
=09=09=09document.write(gos);
=09=09} catch (Exception e) {
=09=09=09throw new RuntimeException(e);
=09=09} finally {
=09=09=09if(gos !=3D null)
=09=09=09=09gos.close();
=09=09=09else
=09=09=09=09os.close();
=09=09}
=09}

Anyone have any idea?