public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest) request;
HttpServletResponse httpResponse = (HttpServletResponse) response;
// create input/output dir patterns
String contextPath = httpRequest.getContextPath();
if (this.inDirPattern == null) {
// NOTE: Have to do this here because the context path is not
// available in init().
this.inDirPattern =
Pattern.compile("^" + escape(contextPath) + escape(this.inDirName) + "/(.*)");
this.outDirPattern =
Pattern.compile("^" + escape(contextPath) + "/help/[a-z]{2}(?:_[A-Z]{2})?/.*");
if (ZimbraLog.webclient.isDebugEnabled()) {
ZimbraLog.webclient.debug("### indir pattern: " + this.inDirPattern.pattern());
ZimbraLog.webclient.debug("### outdir pattern: " + this.outDirPattern.pattern());
}
}
// check to see if we need to redirect this request
String requestUri = httpRequest.getRequestURI();
if (this.outDirPattern.matcher(requestUri).matches()) {
// allow it to go through
chain.doFilter(request, response);
return;
}
// make list of potential locales to check
Locale preferredLocale = getLocale(httpRequest);
String language = preferredLocale.getLanguage();
String country = preferredLocale.getCountry();
Locale[] locales = {preferredLocale, country != null ? new Locale(language) : null, Locale.US};
if (ZimbraLog.webclient.isDebugEnabled()) {
for (Locale locale : locales) {
ZimbraLog.webclient.debug("locale: " + locale);
}
}
// find out which version of the requested file exists
Locale actualLocale = preferredLocale;
Matcher matcher = this.inDirPattern.matcher(requestUri);
if (!matcher.matches()) {
httpResponse.sendError(
HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Help URL doesn't match input pattern.");
return;
}
if (ZimbraLog.webclient.isDebugEnabled()) {
ZimbraLog.webclient.debug("### filename: " + matcher.group(1));
}
String filename = decode(matcher.group(1)).replace('/', File.separatorChar);
if (ZimbraLog.webclient.isDebugEnabled()) {
ZimbraLog.webclient.debug("### filename: " + filename);
}
File baseDir = new File(this.context.getRealPath("/"));
if (ZimbraLog.webclient.isDebugEnabled()) {
ZimbraLog.webclient.debug("### basedir: " + baseDir);
}
for (Locale locale : locales) {
if (locale == null) continue;
File file =
new File(
baseDir,
this.outDirName.replaceAll("\\{locale\\}", locale.toString())
+ File.separatorChar
+ filename);
if (file.exists()) {
actualLocale = locale;
break;
}
}
// redirect
String redirectUrl =
contextPath
+ this.outDirName.replaceAll("\\{locale\\}", actualLocale.toString())
+ "/"
+ filename;
if (ZimbraLog.webclient.isDebugEnabled()) {
ZimbraLog.webclient.debug("redirecting to: " + redirectUrl);
}
httpResponse.sendRedirect(redirectUrl);
}
