Package org.apache.http.impl.client.cache

Class ResponseCachingPolicy

  • @Contract(threading=IMMUTABLE)
class ResponseCachingPolicy
extends java.lang.Object
    Determines if an HttpResponse can be cached.
    Since:
    4.1

    • Field Detail

      • AUTH_CACHEABLE_PARAMS

        private static final java.lang.String[] AUTH_CACHEABLE_PARAMS

      • maxObjectSizeBytes

        private final long maxObjectSizeBytes

      • sharedCache

        private final boolean sharedCache

      • neverCache1_0ResponsesWithQueryString

        private final boolean neverCache1_0ResponsesWithQueryString

      • log

        private final org.apache.commons.logging.Log log

      • cacheableStatuses

        private static final java.util.Set<java.lang.Integer> cacheableStatuses

      • uncacheableStatuses

        private final java.util.Set<java.lang.Integer> uncacheableStatuses

    • Constructor Detail

      • ResponseCachingPolicy

        public ResponseCachingPolicy​(long maxObjectSizeBytes,
                             boolean sharedCache,
                             boolean neverCache1_0ResponsesWithQueryString,
                             boolean allow303Caching)
        Define a cache policy that limits the size of things that should be stored in the cache to a maximum of HttpResponse bytes in size.
        Parameters:
        maxObjectSizeBytes - the size to limit items into the cache
        sharedCache - whether to behave as a shared cache (true) or a non-shared/private cache (false)
        neverCache1_0ResponsesWithQueryString - true to never cache HTTP 1.0 responses with a query string, false to cache if explicit cache headers are found.
        allow303Caching - if this policy is permitted to cache 303 response

    • Method Detail

      • isResponseCacheable

        public boolean isResponseCacheable​(java.lang.String httpMethod,
                                   org.apache.http.HttpResponse response)
        Determines if an HttpResponse can be cached.
        Parameters:
        httpMethod - What type of request was this, a GET, PUT, other?
        response - The origin response
        Returns:
        true if response is cacheable

      • unknownStatusCode

        private boolean unknownStatusCode​(int status)

      • isExplicitlyNonCacheable

        protected boolean isExplicitlyNonCacheable​(org.apache.http.HttpResponse response)

      • hasCacheControlParameterFrom

        protected boolean hasCacheControlParameterFrom​(org.apache.http.HttpMessage msg,
                                               java.lang.String[] params)

      • isExplicitlyCacheable

        protected boolean isExplicitlyCacheable​(org.apache.http.HttpResponse response)

      • isResponseCacheable

        public boolean isResponseCacheable​(org.apache.http.HttpRequest request,
                                   org.apache.http.HttpResponse response)
        Determine if the HttpResponse gotten from the origin is a cacheable response.
        Parameters:
        request - the HttpRequest that generated an origin hit
        response - the HttpResponse from the origin
        Returns:
        true if response is cacheable

      • expiresHeaderLessOrEqualToDateHeaderAndNoCacheControl

        private boolean expiresHeaderLessOrEqualToDateHeaderAndNoCacheControl​(org.apache.http.HttpResponse response)

      • from1_0Origin

        private boolean from1_0Origin​(org.apache.http.HttpResponse response)

      • requestProtocolGreaterThanAccepted

        private boolean requestProtocolGreaterThanAccepted​(org.apache.http.HttpRequest req)