Java CacheControl.noCache方法代码示例

import org.springframework.http.CacheControl; //导入方法依赖的package包/类
private CacheControl createCacheConfig(long maxAgeSeconds) {
    if (maxAgeSeconds < 0) {
        return CacheControl.noCache();
    } else {
        return CacheControl.maxAge(maxAgeSeconds, TimeUnit.SECONDS);
    }
}
 

import org.springframework.http.CacheControl; //导入方法依赖的package包/类
/**
 * Apply the given cache seconds and generate corresponding HTTP headers,
 * i.e. allow caching for the given number of seconds in case of a positive
 * value, prevent caching if given a 0 value, do nothing else.
 * Does not tell the browser to revalidate the resource.
 * @param response current HTTP response
 * @param cacheSeconds positive number of seconds into the future that the
 * response should be cacheable for, 0 to prevent caching
 */
@SuppressWarnings("deprecation")
protected final void applyCacheSeconds(HttpServletResponse response, int cacheSeconds) {
	if (this.useExpiresHeader || !this.useCacheControlHeader) {
		// Deprecated HTTP 1.0 cache behavior, as in previous Spring versions
		if (cacheSeconds > 0) {
			cacheForSeconds(response, cacheSeconds);
		}
		else if (cacheSeconds == 0) {
			preventCaching(response);
		}
	}
	else {
		CacheControl cControl;
		if (cacheSeconds > 0) {
			cControl = CacheControl.maxAge(cacheSeconds, TimeUnit.SECONDS);
			if (this.alwaysMustRevalidate) {
				cControl = cControl.mustRevalidate();
			}
		}
		else if (cacheSeconds == 0) {
			cControl = (this.useCacheControlNoStore ? CacheControl.noStore() : CacheControl.noCache());
		}
		else {
			cControl = CacheControl.empty();
		}
		applyCacheControl(response, cControl);
	}
}
 

import org.springframework.http.CacheControl; //导入方法依赖的package包/类
private CacheControl parseCacheControl(Element element) {
	CacheControl cacheControl = CacheControl.empty();
	if ("true".equals(element.getAttribute("no-cache"))) {
		cacheControl = CacheControl.noCache();
	}
	else if ("true".equals(element.getAttribute("no-store"))) {
		cacheControl = CacheControl.noStore();
	}
	else if (element.hasAttribute("max-age")) {
		cacheControl = CacheControl.maxAge(Long.parseLong(element.getAttribute("max-age")), TimeUnit.SECONDS);
	}
	if ("true".equals(element.getAttribute("must-revalidate"))) {
		cacheControl = cacheControl.mustRevalidate();
	}
	if ("true".equals(element.getAttribute("no-transform"))) {
		cacheControl = cacheControl.noTransform();
	}
	if ("true".equals(element.getAttribute("cache-public"))) {
		cacheControl = cacheControl.cachePublic();
	}
	if ("true".equals(element.getAttribute("cache-private"))) {
		cacheControl = cacheControl.cachePrivate();
	}
	if ("true".equals(element.getAttribute("proxy-revalidate"))) {
		cacheControl = cacheControl.proxyRevalidate();
	}
	if (element.hasAttribute("s-maxage")) {
		cacheControl = cacheControl.sMaxAge(Long.parseLong(element.getAttribute("s-maxage")), TimeUnit.SECONDS);
	}
	return cacheControl;
}
 

import org.springframework.http.CacheControl; //导入方法依赖的package包/类
public CacheControl toCacheControl() {
    if (Boolean.TRUE.equals(this.noStore)) {
        return CacheControl.noStore();
    }
    if (Boolean.TRUE.equals(this.noCache)) {
        return CacheControl.noCache();
    }
    if (this.maxAge != null) {
        return CacheControl.maxAge(this.maxAge.getSeconds(), TimeUnit.SECONDS);
    }
    return CacheControl.empty();
}
 

import org.springframework.http.CacheControl; //导入方法依赖的package包/类
public void configureResponse( HttpServletResponse response, String contentType, CacheStrategy cacheStrategy,
    String filename, boolean attachment )
{
    CacheControl cacheControl;

    if ( contentType != null )
    {
        response.setContentType( contentType );
    }

    if ( CacheStrategy.RESPECT_SYSTEM_SETTING.equals( cacheStrategy ) )
    {
        String strategy = trimToNull( (String) systemSettingManager.getSystemSetting( SettingKey.CACHE_STRATEGY ) );

        cacheStrategy = strategy != null ? CacheStrategy.valueOf( strategy ) : CacheStrategy.NO_CACHE;
    }

    if ( CacheStrategy.CACHE_15_MINUTES.equals( cacheStrategy ) )
    {
        cacheControl = CacheControl.maxAge( 15, TimeUnit.MINUTES );
    }
    else if ( CacheStrategy.CACHE_30_MINUTES.equals( cacheStrategy ) )
    {
        cacheControl = CacheControl.maxAge( 30, TimeUnit.MINUTES );
    }
    else if ( CacheStrategy.CACHE_1_HOUR.equals( cacheStrategy ) )
    {
        cacheControl = CacheControl.maxAge( 1, TimeUnit.HOURS );
    }
    else if ( CacheStrategy.CACHE_6AM_TOMORROW.equals( cacheStrategy ) )
    {
        cacheControl = CacheControl.maxAge( getSecondsUntilTomorrow( 6 ), TimeUnit.SECONDS );
    }
    else if ( CacheStrategy.CACHE_TWO_WEEKS.equals( cacheStrategy ) )
    {
        cacheControl = CacheControl.maxAge( 14, TimeUnit.DAYS );
    }
    else
    {
        cacheControl = CacheControl.noCache();
    }

    if ( cacheStrategy != null && cacheStrategy != CacheStrategy.NO_CACHE )
    {
        Cacheability cacheability = (Cacheability) systemSettingManager.getSystemSetting( SettingKey.CACHEABILITY );

        if ( cacheability.equals( Cacheability.PUBLIC ) )
        {
            cacheControl.cachePublic();
        }
        else if ( cacheability.equals( Cacheability.PRIVATE ) )
        {
            cacheControl.cachePrivate();
        }
    }

    response.setHeader( HEADER_CACHE_CONTROL, cacheControl.getHeaderValue() );

    if ( filename != null )
    {
        String type = attachment ? "attachment" : "inline";

        response.setHeader( HEADER_CONTENT_DISPOSITION, type + "; filename=\"" + filename + "\"" );
    }
}