private void parseCache(Request request, T object, String string, String mimeType)
throws UnsupportedEncodingException {
com.squareup.okhttp.CacheControl cacheControl = request.cacheControl();
if (cacheControl != null) {
if (!cacheControl.noCache() && !cacheControl.noStore()) {
if (object instanceof EAResult) {
EAResult kResult = (EAResult) object;
if (kResult != null && kResult.isSuccess()) {
long now = System.currentTimeMillis();
long maxAge = cacheControl.maxAgeSeconds();
long softExpire = now + maxAge * 1000;
System.out.println("缓存时长:" + (softExpire - now) / 1000 + "秒");
Cache.Entry entry = new Cache.Entry();
entry.softTtl = softExpire;
entry.ttl = entry.softTtl;
// entry.serverDate = serverDate;
// entry.responseHeaders = headers;
entry.mimeType = mimeType;
System.out.println("request.cacheControl()==" + request.cacheControl());
entry.data = string.getBytes(UTF8);
cache.put(request.urlString(), entry);
}
}
}
}
}
/**
* Returns a strategy to satisfy {@code request} using the a cached response {@code response}.
*/
public CacheStrategy get() {
CacheStrategy candidate = getCandidate();
if (candidate.networkRequest != null && request.cacheControl().onlyIfCached()) {
// We're forbidden from using the network and the cache is insufficient.
return new CacheStrategy(null, null);
}
return candidate;
}
/** Returns true if {@code response} can be stored to later serve another request. */
public static boolean isCacheable(Response response, Request request) {
// Always go to network for uncacheable response codes (RFC 7231 section 6.1),
// This implementation doesn't support caching partial content.
switch (response.code()) {
case HTTP_OK:
case HTTP_NOT_AUTHORITATIVE:
case HTTP_NO_CONTENT:
case HTTP_MULT_CHOICE:
case HTTP_MOVED_PERM:
case HTTP_NOT_FOUND:
case HTTP_BAD_METHOD:
case HTTP_GONE:
case HTTP_REQ_TOO_LONG:
case HTTP_NOT_IMPLEMENTED:
case HTTP_PERM_REDIRECT:
// These codes can be cached unless headers forbid it.
break;
case HTTP_MOVED_TEMP:
case HTTP_TEMP_REDIRECT:
// These codes can only be cached with the right response headers.
// http://tools.ietf.org/html/rfc7234#section-3
// s-maxage is not checked because OkHttp is a private cache that should ignore s-maxage.
if (response.header("Expires") != null
|| response.cacheControl().maxAgeSeconds() != -1
|| response.cacheControl().isPublic()
|| response.cacheControl().isPrivate()) {
break;
}
// Fall-through.
default:
// All other codes cannot be cached.
return false;
}
// A 'no-store' directive on request or response prevents the response from being cached.
return !response.cacheControl().noStore() && !request.cacheControl().noStore();
}
/** Returns a strategy to use assuming the request can use the network. */
private CacheStrategy getCandidate() {
// No cached response.
if (cacheResponse == null) {
return new CacheStrategy(request, null);
}
// Drop the cached response if it's missing a required handshake.
if (request.isHttps() && cacheResponse.handshake() == null) {
return new CacheStrategy(request, null);
}
// If this response shouldn't have been stored, it should never be used
// as a response source. This check should be redundant as long as the
// persistence store is well-behaved and the rules are constant.
if (!isCacheable(cacheResponse, request)) {
return new CacheStrategy(request, null);
}
CacheControl requestCaching = request.cacheControl();
if (requestCaching.noCache() || hasConditions(request)) {
return new CacheStrategy(request, null);
}
long ageMillis = cacheResponseAge();
long freshMillis = computeFreshnessLifetime();
if (requestCaching.maxAgeSeconds() != -1) {
freshMillis = Math.min(freshMillis, SECONDS.toMillis(requestCaching.maxAgeSeconds()));
}
long minFreshMillis = 0;
if (requestCaching.minFreshSeconds() != -1) {
minFreshMillis = SECONDS.toMillis(requestCaching.minFreshSeconds());
}
long maxStaleMillis = 0;
CacheControl responseCaching = cacheResponse.cacheControl();
if (!responseCaching.mustRevalidate() && requestCaching.maxStaleSeconds() != -1) {
maxStaleMillis = SECONDS.toMillis(requestCaching.maxStaleSeconds());
}
if (!responseCaching.noCache() && ageMillis + minFreshMillis < freshMillis + maxStaleMillis) {
Response.Builder builder = cacheResponse.newBuilder();
if (ageMillis + minFreshMillis >= freshMillis) {
builder.addHeader("Warning", "110 HttpURLConnection \"Response is stale\"");
}
long oneDayMillis = 24 * 60 * 60 * 1000L;
if (ageMillis > oneDayMillis && isFreshnessLifetimeHeuristic()) {
builder.addHeader("Warning", "113 HttpURLConnection \"Heuristic expiration\"");
}
return new CacheStrategy(null, builder.build());
}
Request.Builder conditionalRequestBuilder = request.newBuilder();
if (etag != null) {
conditionalRequestBuilder.header("If-None-Match", etag);
} else if (lastModified != null) {
conditionalRequestBuilder.header("If-Modified-Since", lastModifiedString);
} else if (servedDate != null) {
conditionalRequestBuilder.header("If-Modified-Since", servedDateString);
}
Request conditionalRequest = conditionalRequestBuilder.build();
return hasConditions(conditionalRequest)
? new CacheStrategy(conditionalRequest, cacheResponse)
: new CacheStrategy(conditionalRequest, null);
}
