private static HttpResponse addEtag(
HttpRequest nettyRequest, HttpResponse httpResponse, File file) {
if (Play.mode == Play.Mode.DEV) {
httpResponse.setHeader(CACHE_CONTROL, "no-cache");
} else {
String maxAge = Play.configuration.getProperty("http.cacheControl", "3600");
if (maxAge.equals("0")) {
httpResponse.setHeader(CACHE_CONTROL, "no-cache");
} else {
httpResponse.setHeader(CACHE_CONTROL, "max-age=" + maxAge);
}
}
boolean useEtag = Play.configuration.getProperty("http.useETag", "true").equals("true");
long last = file.lastModified();
final String etag = "\"" + last + "-" + file.hashCode() + "\"";
if (!isModified(etag, last, nettyRequest)) {
if (nettyRequest.getMethod().equals(HttpMethod.GET)) {
httpResponse.setStatus(HttpResponseStatus.NOT_MODIFIED);
}
if (useEtag) {
httpResponse.setHeader(ETAG, etag);
}
} else {
httpResponse.setHeader(LAST_MODIFIED, Utils.getHttpDateFormatter().format(new Date(last)));
if (useEtag) {
httpResponse.setHeader(ETAG, etag);
}
}
return httpResponse;
}
public static boolean isModified(String etag, long last, HttpRequest nettyRequest) {
if (nettyRequest.containsHeader(IF_NONE_MATCH)) {
final String browserEtag = nettyRequest.getHeader(IF_NONE_MATCH);
if (browserEtag.equals(etag)) {
return false;
}
return true;
}
if (nettyRequest.containsHeader(IF_MODIFIED_SINCE)) {
final String ifModifiedSince = nettyRequest.getHeader(IF_MODIFIED_SINCE);
if (!StringUtils.isEmpty(ifModifiedSince)) {
try {
Date browserDate = Utils.getHttpDateFormatter().parse(ifModifiedSince);
if (browserDate.getTime() >= last) {
return false;
}
} catch (ParseException ex) {
Logger.warn("Can't parse HTTP date", ex);
}
return true;
}
}
return true;
}
private static boolean isValidTimeStamp(long last, String dateString) {
try {
long browserDate = Utils.getHttpDateFormatter().parse(dateString).getTime();
return browserDate >= last;
} catch (ParseException e) {
Logger.error("Can't parse date", e);
return false;
}
}
public void serveStatic(
HttpServletResponse servletResponse,
HttpServletRequest servletRequest,
RenderStatic renderStatic)
throws IOException {
VirtualFile file = Play.getVirtualFile(renderStatic.file);
if (file == null || file.isDirectory() || !file.exists()) {
serve404(
servletRequest,
servletResponse,
new NotFound("The file " + renderStatic.file + " does not exist"));
} else {
servletResponse.setContentType(MimeTypes.getContentType(file.getName()));
boolean raw = false;
for (PlayPlugin plugin : Play.plugins) {
if (plugin.serveStatic(file, Request.current(), Response.current())) {
raw = true;
break;
}
}
if (raw) {
copyResponse(Request.current(), Response.current(), servletRequest, servletResponse);
} else {
if (Play.mode == Play.Mode.DEV) {
servletResponse.setHeader("Cache-Control", "no-cache");
servletResponse.setHeader("Content-Length", String.valueOf(file.length()));
if (!servletRequest.getMethod().equals("HEAD")) {
copyStream(servletResponse, file.inputstream());
} else {
copyStream(servletResponse, new ByteArrayInputStream(new byte[0]));
}
} else {
long last = file.lastModified();
String etag = "\"" + last + "-" + file.hashCode() + "\"";
if (!isModified(etag, last, servletRequest)) {
servletResponse.setHeader("Etag", etag);
servletResponse.setStatus(304);
} else {
servletResponse.setHeader(
"Last-Modified", Utils.getHttpDateFormatter().format(new Date(last)));
servletResponse.setHeader(
"Cache-Control",
"max-age=" + Play.configuration.getProperty("http.cacheControl", "3600"));
servletResponse.setHeader("Etag", etag);
copyStream(servletResponse, file.inputstream());
}
}
}
}
}
public static boolean isModified(String etag, long last, HttpServletRequest request) {
if (!(request.getHeader("If-None-Match") == null
&& request.getHeaders("If-Modified-Since") == null)) {
return true;
} else {
String browserEtag = request.getHeader("If-None-Match");
if (!browserEtag.equals(etag)) {
return true;
} else {
try {
Date browserDate =
Utils.getHttpDateFormatter().parse(request.getHeader("If-Modified-Since"));
if (browserDate.getTime() >= last) {
return false;
}
} catch (ParseException ex) {
Logger.error("Can't parse date", ex);
}
return true;
}
}
}
