Response 304. But chrome can't Parse.

[hanxi]

I use webserver in android 4.3 . In index.html include some css and js file. When refresh browser, some request css and js file are response 304 and the response text are not normal, They are begin some binary bytes with http header.

[ritchieGitHub]

we need more details to be able to help you. What does the webserver log say? did you trace the communication using a sniffer? (wireshark)

[hanxi]

I use SimpleWebServer with this in android.

mHTTPSrv = new SimpleWebServer(null, port, wwwRoot, true, "*");

Then in PC Chrome visit this webserver, and refresh twice. the console error is this:

And response is this:

trace is this:

12-21 14:02:06.367 27723-29409/info.hanxi.phoneservice E/fi.iki.elonen.NanoHTTPD: Could not send response to the client
                                                                                  java.net.SocketException: sendto failed: EPIPE (Broken pipe)
                                                                                      at libcore.io.IoBridge.maybeThrowAfterSendto(IoBridge.java:510)
                                                                                      at libcore.io.IoBridge.sendto(IoBridge.java:479)
                                                                                      at java.net.PlainSocketImpl.write(PlainSocketImpl.java:508)
                                                                                      at java.net.PlainSocketImpl.access$100(PlainSocketImpl.java:46)
                                                                                      at java.net.PlainSocketImpl$PlainSocketOutputStream.write(PlainSocketImpl.java:270)
                                                                                      at java.io.OutputStream.write(OutputStream.java:82)
                                                                                      at fi.iki.elonen.NanoHTTPD$Response$ChunkedOutputStream.write(NanoHTTPD.java:1261)
                                                                                      at fi.iki.elonen.NanoHTTPD$Response$ChunkedOutputStream.write(NanoHTTPD.java:1247)
                                                                                      at java.util.zip.GZIPOutputStream.writeLong(GZIPOutputStream.java:112)
                                                                                      at java.util.zip.GZIPOutputStream.finish(GZIPOutputStream.java:95)
                                                                                      at fi.iki.elonen.NanoHTTPD$Response.sendBodyWithCorrectEncoding(NanoHTTPD.java:1451)
                                                                                      at fi.iki.elonen.NanoHTTPD$Response.sendBodyWithCorrectTransferAndEncoding(NanoHTTPD.java:1440)
                                                                                      at fi.iki.elonen.NanoHTTPD$Response.send(NanoHTTPD.java:1429)
                                                                                      at fi.iki.elonen.NanoHTTPD$HTTPSession.execute(NanoHTTPD.java:852)
                                                                                      at fi.iki.elonen.NanoHTTPD$ClientHandler.run(NanoHTTPD.java:189)
                                                                                      at java.lang.Thread.run(Thread.java:841)
                                                                                   Caused by: libcore.io.ErrnoException: sendto failed: EPIPE (Broken pipe)
                                                                                      at libcore.io.Posix.sendtoBytes(Native Method)
                                                                                      at libcore.io.Posix.sendto(Posix.java:155)
                                                                                      at libcore.io.BlockGuardOs.sendto(BlockGuardOs.java:177)
                                                                                      at libcore.io.IoBridge.sendto(IoBridge.java:477)
                                                                                      at java.net.PlainSocketImpl.write(PlainSocketImpl.java:508) 
                                                                                      at java.net.PlainSocketImpl.access$100(PlainSocketImpl.java:46) 
                                                                                      at java.net.PlainSocketImpl$PlainSocketOutputStream.write(PlainSocketImpl.java:270) 
                                                                                      at java.io.OutputStream.write(OutputStream.java:82) 
                                                                                      at fi.iki.elonen.NanoHTTPD$Response$ChunkedOutputStream.write(NanoHTTPD.java:1261) 
                                                                                      at fi.iki.elonen.NanoHTTPD$Response$ChunkedOutputStream.write(NanoHTTPD.java:1247) 
                                                                                      at java.util.zip.GZIPOutputStream.writeLong(GZIPOutputStream.java:112) 
                                                                                      at java.util.zip.GZIPOutputStream.finish(GZIPOutputStream.java:95) 
                                                                                      at fi.iki.elonen.NanoHTTPD$Response.sendBodyWithCorrectEncoding(NanoHTTPD.java:1451) 
                                                                                      at fi.iki.elonen.NanoHTTPD$Response.sendBodyWithCorrectTransferAndEncoding(NanoHTTPD.java:1440) 
                                                                                      at fi.iki.elonen.NanoHTTPD$Response.send(NanoHTTPD.java:1429) 
                                                                                      at fi.iki.elonen.NanoHTTPD$HTTPSession.execute(NanoHTTPD.java:852) 
                                                                                      at fi.iki.elonen.NanoHTTPD$ClientHandler.run(NanoHTTPD.java:189) 
                                                                                      at java.lang.Thread.run(Thread.java:841) 

[giridharkannan]

This issue happens because Transfer-Encoding: chunked is set, which is because Content-Encoding: gzip is set for 304 response.
For time being your could override useGzipWhenAccepted method to solve this issue.

    @Override
    protected boolean useGzipWhenAccepted(Response r) {
        return super.useGzipWhenAccepted(r) && r.getStatus() != Response.Status.NOT_MODIFIED;
    }

[hanxi]

@giridharkannan Thanks a lot! It solved my problem.

// SimpleWebServer.java
...
public class SimpleWebServer extends NanoHTTPD {

    @Override
    protected boolean useGzipWhenAccepted(Response r) {
        return super.useGzipWhenAccepted(r) && r.getStatus() != Response.Status.NOT_MODIFIED;
    }
...