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27 package org.apache.hc.client5.http.impl.cache;
28
29 import org.apache.hc.client5.http.cache.RequestCacheControl;
30 import org.apache.hc.core5.http.HttpRequest;
31 import org.apache.hc.core5.http.HttpVersion;
32 import org.apache.hc.core5.http.Method;
33 import org.apache.hc.core5.http.ProtocolVersion;
34 import org.slf4j.Logger;
35 import org.slf4j.LoggerFactory;
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39
40 class CacheableRequestPolicy {
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42 private static final Logger LOG = LoggerFactory.getLogger(CacheableRequestPolicy.class);
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51 public boolean canBeServedFromCache(final RequestCacheControl cacheControl, final HttpRequest request) {
52 final String method = request.getMethod();
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54 final ProtocolVersion pv = request.getVersion() != null ? request.getVersion() : HttpVersion.DEFAULT;
55 if (HttpVersion.HTTP_1_1.compareToVersion(pv) != 0) {
56 LOG.debug("non-HTTP/1.1 request cannot be served from cache");
57 return false;
58 }
59
60 if (!Method.GET.isSame(method) && !Method.HEAD.isSame(method)) {
61 if (LOG.isDebugEnabled()) {
62 LOG.debug("{} request cannot be served from cache", method);
63 }
64 return false;
65 }
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67 if (cacheControl.isNoStore()) {
68 LOG.debug("Request with no-store cannot be served from cache");
69 return false;
70 }
71 if (cacheControl.isNoCache()) {
72 LOG.debug("Request with no-cache cannot be served from cache");
73 return false;
74 }
75 LOG.debug("Request can be served from cache");
76 return true;
77 }
78
79 }