package br.com.caelum.vraptor.dash.uristats;
import java.util.Enumeration;
import javax.inject.Inject;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import br.com.caelum.vraptor.Accepts;
import br.com.caelum.vraptor.AroundCall;
import br.com.caelum.vraptor.Intercepts;
import br.com.caelum.vraptor.controller.ControllerMethod;
import br.com.caelum.vraptor.dash.cache.ObservableResponse;
import br.com.caelum.vraptor.http.VRaptorResponse;
import br.com.caelum.vraptor.interceptor.SimpleInterceptorStack;
import br.com.caelum.vraptor.ioc.Container;
/**
* Saves all request information as statistics
*
* @author guilherme silveira
*/
@Intercepts
public class BaseURIStatInterceptor {
private static final Logger LOG = LoggerFactory.getLogger(BaseURIStatInterceptor.class);
private final HttpServletRequest request;
private final Container container;
private final HttpServletResponse response;
private final ControllerMethod method;
@Inject
public BaseURIStatInterceptor(Container container,
HttpServletRequest request, HttpServletResponse response,
ControllerMethod method) {
this.container = container;
this.request = request;
this.response = response;
this.method = method;
}
/**
* @deprecated CDI eyes only
*/
protected BaseURIStatInterceptor() {
this(null, null, null, null);
}
@Accepts
public boolean accepts(ControllerMethod method) {
return !method.getController().getType().isAnnotationPresent(NoURIStats.class);
}
@AroundCall
public void intercept(SimpleInterceptorStack stack) {
long before = System.currentTimeMillis();
stack.next();
try {
long time = System.currentTimeMillis() - before;
String key = userKey(container);
String resource = method.getController().getType().getName();
String methodName = method.getMethod().getName();
String etag = "";
String cacheControl = "";
String hadEtag = "unknown";
long size = 0;
int status = 200;
if (response instanceof VRaptorResponse) {
VRaptorResponse r = (VRaptorResponse) response;
ServletResponse sr = r.getResponse();
if(sr instanceof ObservableResponse) {
ObservableResponse resp = (ObservableResponse) sr;
etag = resp.getEtagHeader();
if(etag.equals("")) {
etag = resp.getMd5();
hadEtag = "false";
} else {
hadEtag = "true";
}
size = resp.size();
cacheControl = resp.getCacheControlHeader();
status = resp.getGivenStatus();
}
}
String queryString = extractQueryString(request.getMethod());
Stat stat = new Stat(key, request.getRequestURI(), queryString, time,
request.getMethod(), resource, methodName,
etag, status, hadEtag,
cacheControl, size);
saveStat(stat);
} catch (Exception ex) {
LOG.error("Unable to prepare stat to save:", ex);
}
}
private String extractQueryString(String method) {
// security, do not log parameters on passwords and so on
if(!method.equalsIgnoreCase("GET")) return "";
String queryString = "";
Enumeration<String> paramNames = request.getParameterNames();
boolean hadParameter = false;
while(paramNames.hasMoreElements()) {
if(hadParameter) {
queryString += "&";
}
String name = paramNames.nextElement();
queryString += name + "=" + request.getParameter(name);
hadParameter = true;
}
return queryString;
}
/**
* Saves this stat where you want
* @param stat
*/
protected void saveStat(Stat stat) {
stat.log();
}
public static String userKey(Container container) {
String key = "";
try {
IdeableUser user = container.instanceFor(IdeableUser.class);
key = user.getId().toString();
} catch (Exception e) {
key = "";
}
return key;
}
}