Examples of com.gargoylesoftware.htmlunit.Cache

com.gargoylesoftware.htmlunit.Cache

Simple cache implementation which caches compiled JavaScript files and parsed CSS snippets. Caching compiled JavaScript files avoids unnecessary web requests and additional compilation overhead, while caching parsed CSS snippets avoids very expensive CSS parsing.
@version $Revision: 5301 $ @author Marc Guillemot @author Daniel Gredler

                final String referer = page.getWebResponse().getRequestSettings().getUrl().toExternalForm();
                request.setAdditionalHeader("Referer", referer);
            }


            uri = request.getUrl().toExternalForm();
            final Cache cache = client.getCache();
            final Object fromCache = cache.getCachedObject(request);
            if (fromCache != null && fromCache instanceof CSSStyleSheet) {
                sheet = new Stylesheet(element, (CSSStyleSheet) fromCache, uri);
            }
            else {
                final WebResponse response = client.loadWebResponse(request);
                uri = response.getRequestSettings().getUrl().toExternalForm();
                client.printContentIfNecessary(response);
                client.throwFailingHttpStatusCodeExceptionIfNecessary(response);
                // CSS content must have downloaded OK; go ahead and build the corresponding stylesheet.
                final String css = response.getContentAsString();
                final InputSource source = new InputSource(new StringReader(css));
                sheet = new Stylesheet(element, source, uri);
                cache.cacheIfPossible(request, response, sheet.getWrappedSheet());
            }
        }
        catch (final FailingHttpStatusCodeException e) {
            // Got a 404 response or something like that; behave nicely.
            LOG.error(e.getMessage());

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        String scriptEncoding = charset;
        final String pageEncoding = getPageEncoding();
        final WebRequestSettings referringRequest = getWebResponse().getRequestSettings();


        final WebClient client = getWebClient();
        final Cache cache = client.getCache();


        final WebRequestSettings request = new WebRequestSettings(url);
        request.setAdditionalHeaders(new HashMap<String, String>(referringRequest.getAdditionalHeaders()));
        request.setAdditionalHeader("Referer", referringRequest.getUrl().toString());


        final Object cachedScript = cache.getCachedObject(request);
        if (cachedScript instanceof Script) {
            return (Script) cachedScript;
        }


        final WebResponse response = client.loadWebResponse(request);
        client.printContentIfNecessary(response);
        client.throwFailingHttpStatusCodeExceptionIfNecessary(response);


        final int statusCode = response.getStatusCode();
        final boolean successful = (statusCode >= HttpStatus.SC_OK && statusCode < HttpStatus.SC_MULTIPLE_CHOICES);
        final boolean noContent = (statusCode == HttpStatus.SC_NO_CONTENT);
        if (!successful || noContent) {
            throw new IOException("Unable to download JavaScript from '" + url + "' (status " + statusCode + ").");
        }


        //http://www.ietf.org/rfc/rfc4329.txt
        final String contentType = response.getContentType();
        if (!contentType.equalsIgnoreCase("application/javascript")
            && !contentType.equalsIgnoreCase("application/ecmascript")) {
            if (contentType.equals("text/javascript") || contentType.equals("text/ecmascript")) {
                getWebClient().getIncorrectnessListener().notify(
                    "Obsolete content type encountered: '" + contentType + "'.", this);
            }
            else {
                getWebClient().getIncorrectnessListener().notify(
                        "Expected content type of 'application/javascript' or 'application/ecmascript' for "
                        + "remotely loaded JavaScript element at '" + url + "', "
                        + "but got '" + contentType + "'.", this);
            }
        }


        if (StringUtils.isEmpty(scriptEncoding)) {
            final String contentCharset = response.getContentCharset();
            if (!contentCharset.equals(TextUtil.DEFAULT_CHARSET)) {
                scriptEncoding = contentCharset;
            }
            else if (!pageEncoding.equals(TextUtil.DEFAULT_CHARSET)) {
                scriptEncoding = pageEncoding;
            }
            else {
                scriptEncoding = TextUtil.DEFAULT_CHARSET;
            }
        }


        final String scriptCode = response.getContentAsString(scriptEncoding);
        final JavaScriptEngine javaScriptEngine = client.getJavaScriptEngine();
        final Script script = javaScriptEngine.compile(this, scriptCode, url.toExternalForm(), 1);
        if (script != null) {
            cache.cacheIfPossible(request, response, script);
        }


        return script;
    }

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        }


        final HtmlStyle style = (HtmlStyle) getDomNodeOrDie();
        final String css = style.getTextContent();


        final Cache cache = getWindow().getWebWindow().getWebClient().getCache();
        final CSSStyleSheet cached = cache.getCachedStyleSheet(css);
        final String uri = getDomNodeOrDie().getPage().getWebResponse().getRequestSettings()
        .getUrl().toExternalForm();
        if (cached != null) {
            sheet_ = new Stylesheet(this, cached, uri);
        }
        else {
            final InputSource source = new InputSource(new StringReader(css));
            sheet_ = new Stylesheet(this, source, uri);
            cache.cache(css, sheet_.getWrappedSheet());
        }


        return sheet_;
    }

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