javalite Activeweb如何在HttpSupportFilter中获取用于记录目的的响应正文字符串

Question

How to get responseBody string for logging purpose in HttpSupportFilter ?

Common log solution is create wrapper and insert it to the standar filter

If we use standar filter we cannot access activejdbc db connection layer

I tried to apply wrapper but it does not work, the string is still empty

public class HTTPLogFilter extends HttpSupportFilter {

    private static ThreadLocal<Long> start = new ThreadLocal<>();
    
    @Override
    public void before() {
        start.set(System.currentTimeMillis());
    }

    @Override
    public void after() {

        if(Configuration.HTTPLOGS_ENABLE) {

            Registry.instance().getStatisticsQueue().enqueue(
                    new QueryExecutionEvent(getRoute().getController().getClass().getName() +
                            "#" + getRoute().getActionName() + ":" + method(), System.currentTimeMillis() - start.get()));

            HttpLog httpLog = new HttpLog();

            String username ="TEST";

            Map request = new HashMap<String, Object>();
            request.put("requestUrl", url());
            request.put("contextPath", context());
            request.put("uriFullPath", uri());
            request.put("uriPath", path());
            request.put("method", method());
            request.put("requestHeaders", headers());
            request.put("requestParams", params());
            request.put("queryString", queryString());
            request.put("requestBody", getRequestString());

            Map response = new HashMap<String, Object>();
            response.put("responseHeaders", getResponseHeaders());
            try {
                // BUG ! this responseBody still empty
                response.put("responseBody", getHttpServletResponse().getWriter().toString());
            } catch (IOException e) {
                e.printStackTrace();
            }

            httpLog.setCreatedby(username);
            httpLog.setCreateddt(new Date());
            httpLog.setUsername(username);
            String remoteAddr = ipForwardedFor() != null ? ipForwardedFor() : remoteAddress();
            httpLog.setIpaddress(remoteAddr );
            httpLog.setUseragent(userAgent());
            httpLog.setControllername(getRoute().getController().getClass().getName() + "." + getRoute().getActionName());
            httpLog.setHttpmethod(method());
            httpLog.setHttpexceptions("");
            httpLog.setExecutiondt(new Date(start.get()));
            httpLog.setExecutiondur(System.currentTimeMillis() - start.get());
            httpLog.setHttpurl(url());
            httpLog.setHttprequest(JsonHelper.toJson(request));
            httpLog.setHttpresponse(JsonHelper.toJson(response));
            httpLog.setHttpstatuscode(getHttpServletResponse().getStatus());
            httpLog.saveIt();
        }
    }

}

Answer 1

generally, you are on the right path. It is my understanding that HttpLog is a model, and you want to store the request values that to database, correct?

You write:

if we use standar filter we cannot access activejdbc db connection layer

So, the ActiveWeb filters have ordering, which is documented here: https://javalite.io/controller_filters#filter-ordering

This means that if you want a database connection available in the HTTPLogFilter , you have to register the DBConnectionFilter before the HTTPLogFilter , example:

public class AppControllerConfig extends AbstractControllerConfig {
    public void init(AppContext appContext) {
        add(new DBConnectionFilter(), new HTTPLogFilter());
    }
}

This way, the DBConnectionFilter.before() will be called before the HTTPLogFilter.before() and will open a DB connection accordingly.

On the side note: you will be filling your database pretty quickly, and a recommendation is to simply log all this data to a log file and use a log analyzer like Splunk or Graylog.