/** @see Service#service(nextapp.echo.webcontainer.Connection) */
@Override
public final void service(Connection conn) throws IOException {
/*
* Apply our specific cache seconds value if it has been specified
* using the system property.
*/
if (StringVersionService.Manager.cacheSeconds != -1l) {
conn.getResponse()
.setHeader(
"Cache-Control",
"max-age=" + String.valueOf(StringVersionService.Manager.cacheSeconds) + ", public");
conn.getResponse()
.setDateHeader(
"Expires",
System.currentTimeMillis() + (StringVersionService.Manager.cacheSeconds * 1000));
}
String userAgent = conn.getRequest().getHeader("user-agent");
if (!StringVersionService.Manager.allowIEcompression
&& (userAgent == null || userAgent.indexOf("MSIE") != -1)) {
// Due to behavior detailed Microsoft Knowledge Base Article Id 312496,
// all HTTP compression support is disabled for this browser.
// Due to the fact that ClientProperties information is not necessarily
// available at this stage, browsers which provide deceitful user-agent
// headers will also be affected.
servicePlain(conn);
} else {
String acceptEncoding = conn.getRequest().getHeader("accept-encoding");
if (acceptEncoding != null && acceptEncoding.indexOf("gzip") != -1) {
serviceGZipCompressed(conn);
} else {
servicePlain(conn);
}
}
}
/**
* Renders the resource WITHOUT using GZip encoding.
*
* @param conn the relevant <code>Connection</code>
*/
private void servicePlain(Connection conn) throws IOException {
conn.getResponse().setContentType(getContnentType().getMimeType());
conn.getWriter().print(content);
}
/**
* Renders the resource using GZip encoding.
*
* @param conn the relevant <code>Connection</code>
*/
private void serviceGZipCompressed(Connection conn) throws IOException {
conn.getResponse().setContentType(getContnentType().getMimeType());
conn.getResponse().setHeader("Content-Encoding", "gzip");
conn.getOutputStream().write(gzipContent);
}