You Have A Problem With Apache Gzip Servlet Filter

Over the past few weeks, some of our users have reported to us that they are encountering Apache’s gzip Servlet Filter.

How do I enable gzip on Tomcat?

In fact you will get the following response: Server: Apache-Coyote/1.1 Open a browser and open developer tools [CTRL]+[SHIFT]+i in different browsers. Then navigate to the Tomcat URL http://localhost:8080. As you can see, there is no content encoding response, and besides, the response size is still 32.8 KB.

The GZIP filter I use to enforce resource compression in my web applications:

public course CompressionFilter implements filters   destroy public void()        populace void doFilter(ServletRequest, ServletResponse, FilterChain string) throws IOException, ServletException        HttpServletRequest httpRequest = (HttpServletRequest) request;        HttpServletResponse httpResponse = (HttpServletResponse)Response;        line acceptEncoding = httpRequest.getHeader(HttpHeaders.ACCEPT_ENCODING);        accept (acceptEncoding != null)            once (acceptEncoding.indexOf("gzip") >= 0)                GZIPHttpServletResponseWrapper gzipResponse = new GZIPHttpServletResponseWrapper(httpResponse);                chain.doFilter(Request, gzipResponse);                gzip Answer. break();               come back to;                            chain.doFilter(request, response);        public arrest void init(FilterConfig filterConfig) throws ServletException    public shaping GZIPHttpServletResponseWrapper extends HttpServletResponseWrapper    private ServletResponseGZIPOutputStream gzipStream;    private output stream ServletOutputStream;    private printWriter printWriter;    public GZIPHttpServletResponseWrapper(HttpServletResponse response) throws IOException        very good answer)        response.addHeader(HttpHeaders.CONTENT_ENCODING, "gzip");        public void finish() throws an IOException        if (printWriter != null) printWriter.close();               if (output stream != null)            output stream.close();               if (gzipStream != null)            gzipStream.close();                @Crush    open void flushBuffer() throws an IOException        if (printWriter != null)            printWriter.flush();                if (output stream! is zero)            outputStream.flush();                super.flushBuffer();        @Crush    Manifest ServletOutputStream getOutputStream() throws IOException        although (printWriter != null)            throw the last IllegalStateException ("printWriter already defined");                once(zero output stream) ==            initializationGzip();            outputStream is equivalent to gzipStream;                keep returning outputStream;        @Crush    large public PrintWriter getWriter() throws IOException        just in case (outputStream != null)            throw clean IllegalStateException("printWriter already defined");                come to think of it (printWriter null) ==            initializationGzip();            printWriter means new PrintWriter(new OutputStreamWriter(gzipStream, getResponse().getCharacterEncoding()));                returns printWriter;        @Crush    public void setContentLength(int len)        private void initGzip() throws an IOException        gzipStream = ServletResponse for beginners GZIPOutputStream(getResponse().getOutputStream());    public category ServletResponseGZIPOutputStream extended ServletOutputStream {    GZIPOutputStream gzipStream;    last opened AtomicBoolean = new AtomicBoolean(true);    output stream;   Public ServletResponseGZIPOutputStream(output OutputStream) throws IOException        this.output implies output;        gzipStream = new GZIPOutputStream(Output);        @Crush    void public close() throws an IOException        the actual event that (open.compareAndSet(true, false))            gzipStream.close();                @Crush    public nullify flush() throws an IOException        gzipStream.flush();       @Crush     Arrest void write(byte[] b) throws IOException        write (b, 0, b.length);        @Crush    public useless entry(byte[] b, int off, int len) contains IOException {        if (!open.get()) {

How does the gzip Servlet Filter work?

When an HTTP request comes in with a servlet container designed for a filter, the filtering system intercepts the request before it is normally processed by a servlet, usually a JSP. to whom the request is addressed. The GZip servlet filter checks whether the client (browser) can compress GZip content. If so, in which compression is enabled, I would say the answer.

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